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|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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Widgets
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<font color="#000000" size="2">GTK+ / Gnome Application
Development</font>
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</div>
<div class="SECT1">
<h1 class="SECT1">
<a name="Z207">Widgets</a>
</h1>
<p>
<i class="FIRSTTERM">Widgets</i> are the reason for GTK+'s
existence. Widgets are subclasses of <tt class="CLASSNAME">
GtkWidget</tt>, which is in turn a subclass of <span class=
"STRUCTNAME">GtkObject</span>. A widget represents a
rectangular region on the screen, and may be purely
decorative, an interactive control, or a container
controlling the arrangement of child widgets. <a href=
"cha-gtk.html">the chapter called <i>GTK+ Basics</i></a>
introduces GTK+ and thus widgets; <a href=
"cha-widget.html">the chapter called <i>Writing a <tt
class="CLASSNAME">GtkWidget</tt></i></a> covers widget
implementation and concepts in more detail.
</p>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z208"><tt class="CLASSNAME">GtkWidget</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z209">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z210">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkwidget.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z211">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkWidget</tt> is the parent
class of all widgets. Chapters <a href="cha-gtk.html">
the chapter called <i>GTK+ Basics</i></a> and <a href=
"cha-widget.html">the chapter called <i>Writing a <tt
class="CLASSNAME">GtkWidget</tt></i></a> describe
widgets in general terms.
</p>
<p>
<tt class="CLASSNAME">GtkWidget</tt> is an abstract
base class.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z212"><tt class="CLASSNAME">
GtkContainer</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z213">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z214">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcontainer.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z215">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkContainer</tt> is the abstract
base class for widgets that can contain other widgets.
<a href="sec-containers.html">the section called <i>
Containers And Widget Layout</i> in the chapter called
<i>GTK+ Basics</i></a> describes containers in some
detail; <a href="cha-widget.html">the chapter called
<i>Writing a <tt class="CLASSNAME">
GtkWidget</tt></i></a> includes information on
container widget implementation.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z216"><tt class="CLASSNAME">GtkBin</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z217">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z218">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkbin.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z219">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkBin</tt> is an abstract base
class for containers with one child. It provides
default implementions of the <tt class="CLASSNAME">
GtkContainer</tt> interface, so it is very easy to
subclass. <a href="cha-widget.html">the chapter called
<i>Writing a <tt class="CLASSNAME">
GtkWidget</tt></i></a> describes how to implement a <tt
class="CLASSNAME">GtkBin</tt> subclass.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z220"><tt class="CLASSNAME">GtkWindow</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z221">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z222">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkwindow.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z223">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkWindow</tt> represents a
toplevel dialog or application window. As the primary
toplevel widget in GTK+, it has many special
responsibilities; for example, it maintains the current
keyboard focus and determines its own size allocation
(rather than receiving one from a parent widget).
</p>
<p>
Gnome applications typically use <tt class="CLASSNAME">
GnomeApp</tt> for main application windows, to take
advantage of its added features; for dialogs, you
should use <tt class="CLASSNAME">GnomeDialog</tt> with
Gnome and <tt class="CLASSNAME">GtkDialog</tt> with
GTK+. Of course there are several specialized dialog
subclasses available as well. If none of <tt class=
"CLASSNAME">GtkWindow</tt>'s subclasses seem
appropriate to your application, <tt class="CLASSNAME">
GtkWindow</tt> can also be used directly.
</p>
<p>
A danger worthy of note: <tt class="CLASSNAME">
GtkWindow</tt> is automatically destroyed if it
receives a <span class="SYMBOL">"delete_event"</span>
signal. To prevent this, you must install the <i class=
"EMPHASIS">last</i> signal handler to run, and your
signal handler must return <span class="STRUCTNAME">
TRUE</span>. This is a very common GTK+ programming
mistake; see <a href=
"sec-gdkevent.html#SEC-WINDOWCHANGEEVENTS">the section
called <i>Window Change Events</i> in the chapter
called <i>GDK Basics</i></a> for details. <tt class=
"CLASSNAME">GnomeDialog</tt> will help you handle this
situation; see <a href="cha-dialogs.html">the chapter
called <i>User Communication: Dialogs</i></a>.
</p>
<p>
It is a good idea to make <tt class="CLASSNAME">
GtkWindow</tt> the last container you call <tt class=
"FUNCTION">gtk_widget_show()</tt> on. Most widgets are
not actually mapped (placed onscreen) until their
parent container is; but <tt class="CLASSNAME">
GtkWindow</tt> has no parent, and appears immediately.
So if you show its children after you've shown the
window, you will see some flicker.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z224"><tt class="CLASSNAME">GnomeDialog</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z225">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z226">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-dialog.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z227">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeDialog</tt> (or a subclass)
should be used for all dialogs in a Gnome program. <a
href="cha-dialogs.html">the chapter called <i>User
Communication: Dialogs</i></a> describes the <tt class=
"CLASSNAME">GnomeDialog</tt> interface.
</p>
<p>
If you aren't using Gnome, <tt class="CLASSNAME">
GnomeDialog</tt> is still useful --- because it
implements all the basic features a dialog really must
have. Studying the <tt class="CLASSNAME">
GnomeDialog</tt> source is highly recommended (you can
even cut-and-paste if your application is under the
GPL).
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z228"><tt class="CLASSNAME">GnomeAbout</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z229">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z230">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-about.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z231">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeAbout</tt> is an about
dialog, giving Gnome about dialogs a consistent
look-and-feel. <a href=
"cha-dialogs-special.html#SEC-GNOMEABOUT">the section
called <i><tt class="CLASSNAME">GnomeAbout</tt></i> in
the chapter called <i>User Communication:
Dialogs</i></a> covers the interface.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z232"><tt class="CLASSNAME">
GnomeMessageBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z233">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z234">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-messagebox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z235">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeMessageBox</tt> is simply a
<tt class="CLASSNAME">GnomeDialog</tt> with a label and
a small icon pre-packed inside. The icon corresponds to
a "message box type," such as a warning message, an
error, or a question. This helps users rapidly
determine the dialog's purpose. <a href=
"cha-dialogs-special.html#SEC-MESSAGEBOX">the section
called <i><tt class="CLASSNAME">
GnomeMessageBox</tt></i> in the chapter called <i>User
Communication: Dialogs</i></a> explains the use of this
widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z236"><tt class="CLASSNAME">
GnomePropertyBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z237">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z238">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gnome-propertybox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z239">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomePropertyBox</tt> is a dialog
for application preferences or the properties of some
user-visible object in your program. It has "apply",
"OK", "close", and "help" buttons; "OK" is equivalent
to "apply" followed by "close." <a href=
"cha-dialogs-special.html#SEC-PROPERTYBOX">the section
called <i><tt class="CLASSNAME">
GnomePropertyBox</tt></i> in the chapter called <i>User
Communication: Dialogs</i></a> describes it in more
detail.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z240"><tt class="CLASSNAME">GnomeScores</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z241">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z242">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-scores.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z243">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeScores</tt> keeps track of
and displays a high scores list. Most Gnome games use
it.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z244"><tt class="CLASSNAME">GnomeApp</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z245">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z246">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-app.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z247">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeApp</tt> is a <tt class=
"CLASSNAME">GtkWidget</tt> subclass specialized for
main application windows. It has spaces for an optional
toolbar, menubar, and statusbar. The application's
"document" goes in a special slot in the center of the
widget. <a href="cha-main.html#SEC-GNOMEAPP">the
section called <i>The <tt class="CLASSNAME">
GnomeApp</tt> Widget</i> in the chapter called <i>The
Main Window: <tt class="CLASSNAME">
GnomeApp</tt></i></a> describes this widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z248"><tt class="CLASSNAME">GtkDialog</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z249">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z250">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkdialog.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z251">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkDialog</tt> is a <tt class=
"CLASSNAME">GtkWindow</tt> with three widgets
pre-packed: a <tt class="CLASSNAME">GtkVBox</tt> for
the dialog contents, a <tt class="CLASSNAME">
GtkSeparator</tt>, and a <tt class="CLASSNAME">
GtkHBox</tt> for the dialog's buttons. <tt class=
"CLASSNAME">GtkDialog</tt> is not very useful; all
Gnome programs should use <tt class="CLASSNAME">
GnomeDialog</tt> instead.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z252"><tt class="CLASSNAME">
GnomeFontSelector</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z253">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z254">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gnome-font-selector.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z255">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeFontSelector</tt> is an
obsolete font selection dialog, replaced by <tt class=
"CLASSNAME">GtkFontSelectionDialog</tt>. <tt class=
"CLASSNAME">GtkFontSelectionDialog</tt> contains a <tt
class="CLASSNAME">GtkFontSelection</tt>. Gnome programs
should really use a <tt class="CLASSNAME">
GtkFontSelection</tt> inside a <tt class="CLASSNAME">
GnomeDialog</tt>, because <tt class="CLASSNAME">
GtkFontSelectionDialog</tt> does not use <tt class=
"CLASSNAME">GnomeDialog</tt> and thus its look-and-feel
is slightly wrong. <tt class="CLASSNAME">
GnomeFontSelector</tt> should not be used.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z256"><tt class="CLASSNAME">
GtkInputDialog</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z257">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z258">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkinputdialog.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z259">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkInputDialog</tt> is a dialog
for selecting and setting up devices that use the X
Input Extension (such as drawing tablets). It predates
Gnome and is not a <tt class="CLASSNAME">
GnomeDialog</tt> so it looks a little funny in Gnome
applications, but there is no reasonable workaround
without rewriting the widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z260"><tt class="CLASSNAME">
GtkColorSelectionDialog</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z261">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z262">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcolorsel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z263">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkColorSelectionDialog</tt> is a
dialog containing a <tt class="CLASSNAME">
GtkColorSelection</tt>. Gnome applications should
manually place the <tt class="CLASSNAME">
GtkColorSelection</tt> in a <tt class="CLASSNAME">
GnomeDialog</tt>, or use <tt class="CLASSNAME">
GnomeColorPicker</tt>.
</p>
<div class="FIGURE">
<a name="FIG-COLORSELDIALOG"></a>
<p>
<img src="figures/colorselectiondialog.png">
</p>
<p>
<b>Figure 1. <tt class="CLASSNAME">
GtkColorSelectionDialog</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z264"><tt class="CLASSNAME">
GtkFileSelection</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z265">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z266">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkfilesel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z267">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkFileSelection</tt> is a file
selection dialog (unlike most of the other widgets
ending in "<tt class="APPLICATION">Selection</tt>",
which are composite widgets meant to be placed inside a
dialog). Unfortunately, there is no Gnome replacement
for this dialog, so Gnome applications typically use
it, despite its somewhat inconsistent look.
</p>
<div class="FIGURE">
<a name="Z268"></a>
<p>
<img src="figures/fileselection.png">
</p>
<p>
<b>Figure 2. <tt class="CLASSNAME">
GtkFileSelection</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z269"><tt class="CLASSNAME">
GtkFontSelectionDialog</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z270">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z271">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkfontsel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z272">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkFontSelectionDialog</tt> is a
dialog containing a <tt class="CLASSNAME">
GtkFontSelection</tt>. Gnome applications should use a
<tt class="CLASSNAME">GnomeDialog</tt> containing a <tt
class="CLASSNAME">GtkFontSelection</tt> instead.
</p>
<div class="FIGURE">
<a name="Z273"></a>
<p>
<img src="figures/gtkfontselectiondialog.png">
</p>
<p>
<b>Figure 3. <tt class="CLASSNAME">
GtkFontSelectionDialog</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z274"><tt class="CLASSNAME">GtkPlug</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z275">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z276">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkplug.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z277">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkPlug</tt> is a toplevel window
that can be embedded in a <tt class="CLASSNAME">
GtkSocket</tt> widget running in a separate
application. In other words, <tt class="CLASSNAME">
GtkSocket</tt> is a "hole" in one process that can
contain a <tt class="CLASSNAME">GtkPlug</tt> widget
from another.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z278"><tt class="CLASSNAME">GtkButton</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z279">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z280">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkbutton.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z281">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkButton</tt> is a simple
rectangular button. It's a container with one child;
usually it contains text or a pixmap, but it can
contain any widget.
</p>
<div class="FIGURE">
<a name="Z282"></a>
<p>
<img src="figures/gtkbutton.png">
</p>
<p>
<b>Figure 4. A dialog filled with <tt class=
"CLASSNAME">GtkButton</tt>s</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z283"><tt class="CLASSNAME">
GnomeColorPicker</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z284">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z285">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gnome-color-picker.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z286">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeColorPicker</tt> is a button
containing a small colored square indicating the
currently selected color. When clicked, it creates a
color selection dialog to change the selected color.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z287"><tt class="CLASSNAME">
GnomeFontPicker</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z288">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z289">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gnome-font-picker.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z290">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeFontPicker</tt> is analagous
to <tt class="CLASSNAME">GnomeColorPicker</tt>; it's a
button showing the currently selected font, which pops
up a font selection dialog when clicked.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z291"><tt class="CLASSNAME">GnomeHRef</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z292">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z293">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-href.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z294">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeHRef</tt> is a borderless
button with a hyperlink displayed on it. When the
button is clicked, Gnome points the user's browser at
the hyperlink's target URL, or launches a new browser
instance. The command used to go to the URL is globally
configurable from the Gnome control center.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z295"><tt class="CLASSNAME">
GtkToggleButton</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z296">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z297">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktogglebutton.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z298">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkToggleButton</tt> looks much
like a regular <span class="STRUCTNAME">
GtkButton</span>. However, it is intended to reflect a
toggleable state; when the toggle is "active," the
button appears to be depressed. <tt class="CLASSNAME">
GtkCheckButton</tt> should often be used instead of the
toggle button; the check button usually looks nicer
than <tt class="CLASSNAME">GtkToggleButton</tt>, and
gives the user a better idea that the button represents
a toggleable state.
</p>
<div class="FIGURE">
<a name="Z299"></a>
<p>
<img src="figures/gtktogglebutton.png">
</p>
<p>
<b>Figure 5. Three <tt class="CLASSNAME">
GtkToggleButton</tt> widgets; the center one is
"active."</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z300"><tt class="CLASSNAME">
GtkCheckButton</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z301">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z302">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcheckbutton.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z303">Description</a>
</h3>
<p>
The <tt class="CLASSNAME">GtkCheckButton</tt> widget
works just like the <tt class="CLASSNAME">
GtkToggleButton</tt>, but looks different (it looks
like a label with a small button to the left). In most
cases, the check button is a better choice than the
toggle button, because the toggle button does not give
the user a visual hint that it represents a toggleable
state.
</p>
<div class="FIGURE">
<a name="Z304"></a>
<p>
<img src="figures/gtkcheckbutton.png">
</p>
<p>
<b>Figure 6. Three <tt class="CLASSNAME">
GtkCheckButton</tt> widgets; the center one is
"active."</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z305"><tt class="CLASSNAME">
GtkRadioButton</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z306">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z307">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkradiobutton.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z308">Description</a>
</h3>
<p>
A radio button represents one of several
mutually-exclusive options. Radio buttons are placed in
"groups"; only one button in a group can be active at a
given time. <tt class="CLASSNAME">GtkOptionMenu</tt>
can also be used to represent mutually exclusive
options; an option menu is typically a better choice if
there are more than a few options. A <tt class=
"CLASSNAME">GtkList</tt> or <tt class="CLASSNAME">
GtkCList</tt> might be appropriate if there are a truly
large number of options.
</p>
<div class="FIGURE">
<a name="Z309"></a>
<p>
<img src="figures/gtkradiobutton.png">
</p>
<p>
<b>Figure 7. A group of three <tt class="CLASSNAME">
GtkRadioButton</tt>s</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z310"><tt class="CLASSNAME">
GtkOptionMenu</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z311">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z312">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkoptionmenu.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z313">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkOptionMenu</tt> displays the
currently active item from among a number of options;
when clicked, it pops up a menu to allow the user to
make a new item active. The option menu is slightly
broken; it does not take the size of the menu items
into account when requesting its size. If you have menu
items containing labels in the option menu, the labels
will often be truncated. The best workaround is to give
the option menu more space than it requests, by setting
appropriate options on its parent container.
</p>
<div class="FIGURE">
<a name="Z314"></a>
<p>
<img src="figures/gtkoptionmenu.png">
</p>
<p>
<b>Figure 8. <tt class="CLASSNAME">
GtkOptionMenu</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z315"><tt class="CLASSNAME">
GnomeDockItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z316">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z317">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-dock-item.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z318">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeDockItem</tt> is a container
that allows its child to appear on a <tt class=
"CLASSNAME">GnomeDock</tt>. Dock items can be detached
from their parent window and placed anywhere on the
desktop; they can also be moved around within the dock.
<tt class="CLASSNAME">GnomeDock</tt> lets users
rearrange Gnome toolbars. <tt class="CLASSNAME">
GnomeDockItem</tt> provides the "handle" for dragging
its child. <tt class="CLASSNAME">GnomeApp</tt> uses <tt
class="CLASSNAME">GnomeDock</tt> internally, so Gnome
toolbars are all repositionable.
</p>
<div class="FIGURE">
<a name="Z319"></a>
<p>
<img src="figures/gnomedock.png">
</p>
<p>
<b>Figure 9. <tt class="CLASSNAME">GnomeDock</tt>,
with several <tt class="CLASSNAME">
GnomeDockItem</tt>s.</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z320"><tt class="CLASSNAME">
GtkAlignment</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z321">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z322">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkalignment.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z323">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkAlignment</tt> is an invisible
container used to align a child widget within some
space. It lets you set two factors, each in both the X
and Y direction; the <i class="FIRSTTERM">alignment</i>
is 0.0 for left-justified (or top-justified) and 1.0
for right-justified (or bottom-justified). An alignment
of 0.5 centers the child in that direction. The <i
class="FIRSTTERM">scale</i> factor determines how the
child fills extra space it did not request; if 0.0, the
child fills only its requisition. A scale of 1.0 means
that the child always expands to fill all the available
space. (Clearly, a 1.0 scale factor makes the alignment
factor irrelevant.)
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z324"><tt class="CLASSNAME">GtkFrame</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z325">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z326">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkframe.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z327">Description</a>
</h3>
<p>
The frame widget draws a decorative frame around its
child. It has an optional title describing the contents
of the frame. To turn off the title, set it to <span
class="STRUCTNAME">NULL</span>. It also has a
configurable shadow style; the four possibilities are
shown in <a href="z207.html#FIG-GTKFRAME">Figure
10</a>. <span class="STRUCTNAME">GTK_SHADOW_NONE</span>
is a fifth acceptable value for the shadow type; it
turns the shadow off.
</p>
<div class="FIGURE">
<a name="FIG-GTKFRAME"></a>
<p>
<img src="figures/gtkframe.png">
</p>
<p>
<b>Figure 10. <tt class="CLASSNAME">GtkFrame</tt>,
with the four shadow types.</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z328"><tt class="CLASSNAME">
GtkAspectFrame</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z329">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z330">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkaspectframe.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z331">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkAspectFrame</tt> is used to
control the aspect ratio of its child. It also allows
you to justify the child in both directions, similar to
<tt class="CLASSNAME">GtkAlignment</tt>. You can
specify an aspect ratio, or require that the ratio of
the child's size request be preserved. Visually, <tt
class="CLASSNAME">GtkAspectFrame</tt> looks exactly
like <tt class="CLASSNAME">GtkFrame</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z332"><tt class="CLASSNAME">GtkItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z333">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z334">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z335">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkItem</tt> is an abstract base
class for list items, tree items, and menu items. Items
are widgets that can be "selected," "deselected," and
"toggled."
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z336"><tt class="CLASSNAME">GtkMenuItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z337">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z338">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkmenuitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z339">Description</a>
</h3>
<p>
A menu item is an invisible container; it is the only
kind of widget that can appear in a <tt class=
"CLASSNAME">GtkMenu</tt>. Typically, a label or a label
and a pixmap are placed in the menu item to indicate
its function. If a menu item has no child widget, it
draws a separator line instead. This saves the overhead
of adding a <tt class="CLASSNAME">GtkSeparator</tt> to
the menu item.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z340"><tt class="CLASSNAME">
GtkCheckMenuItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z341">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z342">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcheckmenuitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z343">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkCheckMenuItem</tt> is a menu
item that works like a <tt class="CLASSNAME">
GtkCheckButton</tt>; it has a small button next to its
child widget, which is either "active" or "inactive."
Because it's a subclass of <tt class="CLASSNAME">
GtkMenuItem</tt>, it can appear in menus.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z344"><tt class="CLASSNAME">
GtkRadioMenuItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z345">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z346">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkradiomenuitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z347">Description</a>
</h3>
<p>
A radio menu item works like <tt class="CLASSNAME">
GtkRadioButton</tt>; it allows the user to choose from
a set of mutually exclusive options. Because it's a
subclass of <tt class="CLASSNAME">GtkMenuItem</tt>, it
can appear in menus.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z348"><tt class="CLASSNAME">
GtkPixmapMenuItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z349">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z350">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gtkpixmapmenuitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z351">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkPixmapMenuItem</tt> is a Gnome
widget despite its name. This widget solves a very
specific problem: namely, if a menu contains check or
radio menu items, GTK+ indents the child widget of all
the menu items in the menu to make room for the check
or radio buttons. Gnome uses pixmaps next to some menu
items; <tt class="CLASSNAME">GtkPixmapMenuItem</tt>
indents pixmaps in the same way GTK+ indents check or
radio buttons. If you simply added a pixmap and a label
to a <tt class="CLASSNAME">GtkMenuItem</tt>, the pixmap
would be incorrectly aligned with the plain labels in
other menu items. This widget is not really
pixmap-specific; any widget can be placed in the
unindented "pixmap" slot. Usually <tt class=
"CLASSNAME">GtkPixmapMenuItem</tt> is created
implicitly with the Gnome menu creation functions.
</p>
<div class="FIGURE">
<a name="Z352"></a>
<p>
<img src="figures/gtkpixmapmenuitem.png">
</p>
<p>
<b>Figure 11. <tt class="CLASSNAME">
GtkPixmapMenuItem</tt> correctly positions pixmaps in
a separate column to the left of the menu item
texts.</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z353"><tt class="CLASSNAME">
GtkTearoffMenuItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z354">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z355">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktearoffmenuitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z356">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkTearoffMenuItem</tt> is a
"perforation" representing a spot where a menu can be
"torn off" (kept visible in a toplevel window for easy
access). Gnome menus all include a tearoff menu item by
default, but users can globally disable them using the
Gnome control center.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z357"><tt class="CLASSNAME">GtkListItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z358">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z359">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtklistitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z360">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkListItem</tt> is an invisible
container that allows its child to appear in a <tt
class="CLASSNAME">GtkList</tt>. That is, only list
items can appear in a list.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z361"><tt class="CLASSNAME">GtkTreeItem</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z362">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z363">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktreeitem.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z364">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkTreeItem</tt> is an invisible
container that gives its child the ability to appear in
a <tt class="CLASSNAME">GtkTree</tt>. Only tree items
can be placed in the tree widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z365"><tt class="CLASSNAME">GtkEventBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z366">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z367">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkeventbox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z368">Description</a>
</h3>
<p>
The event box widget may be the simplest container in
GTK+; its only purpose is to have a <span class=
"STRUCTNAME">GdkWindow</span>. Certain operations only
work on widgets with windows (such as setting the
background color, or capturing events); if you want to
perform these operations on a windowless widget, you
can place the widget in an event box and perform the
operations on the event box, achieving much the same
effect.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z369"><tt class="CLASSNAME">
GtkHandleBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z370">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z371">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhandlebox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z372">Description</a>
</h3>
<p>
The handle box widget can be adds a handle to a child
widget; by dragging on the handle, the child can be
removed from the window and positioned elsewhere on the
user's desktop. The handle box is often used for
toolbars. <tt class="CLASSNAME">GnomeDock</tt> and <tt
class="CLASSNAME">GnomeDockItem</tt> offer a more
flexible (but more elaborate) alternative.
</p>
<div class="FIGURE">
<a name="Z373"></a>
<p>
<img src="figures/gtkhandlebox.png">
</p>
<p>
<b>Figure 12. A torn-off <tt class="CLASSNAME">
GtkHandleBox</tt> containing a toolbar, alongside its
original parent window.</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z374"><tt class="CLASSNAME">
GtkScrolledWindow</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z375">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z376">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkscrolledwindow.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z377">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkScrolledWindow</tt> provides
horizontal and vertical scrollbars for its child
widget. Optionally, the scrollbars are hidden when the
entire child is visible. If a child widget has a <span
class="STRUCTNAME">set_scroll_adjustments_signal</span>
in its <tt class="CLASSNAME">GtkWidgetClas</tt> (see <a
href="z144.html#SEC-OVERRIDESIGNALS">the section called
<i>Overridable Signals</i> in the chapter called <i>
Writing a <tt class="CLASSNAME">
GtkWidget</tt></i></a>), the scrolled window uses them
as the adjustments for the scrollbars. Otherwise, the
scrolled window scrolls the entire widget using a <tt
class="CLASSNAME">GtkViewport</tt>. (Consider <tt
class="CLASSNAME">GtkCList</tt> for example; the column
titles aren't scrolled, only the list contents. Thus
<tt class="CLASSNAME">GtkCList</tt> provides scroll
adjustment signals.)
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z378"><tt class="CLASSNAME">GtkViewport</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z379">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z380">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkviewport.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z381">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkViewport</tt> is more or less
an implementation detail of <tt class="CLASSNAME">
GtkScrolledWindow</tt>. It contains a widget that does
not provide a <span class="STRUCTNAME">
set_scroll_adjustments_signal</span>, and provides such
a signal on the child widget's behalf. See <tt class=
"CLASSNAME">GtkScrolledWindow</tt> for more details.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z382"><tt class="CLASSNAME">GtkBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z383">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z384">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkbox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z385">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkBox</tt> is an abstract base
class for <tt class="CLASSNAME">GtkVBox</tt>, <tt
class="CLASSNAME">GtkHBox</tt>, and <tt class=
"CLASSNAME">GtkButtonBox</tt>. It's an invisible layout
container; <a href="cha-gtk.html">the chapter called
<i>GTK+ Basics</i></a> describes it in some detail.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z386"><tt class="CLASSNAME">GtkHBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z387">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z388">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhbox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z389">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkHBox</tt> is a <tt class=
"CLASSNAME">GtkBox</tt> that packs widgets from left to
right. The left side is considered the "start" of the
box.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z390"><tt class="CLASSNAME">GnomeAppBar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z391">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z392">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-appbar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z393">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeAppBar</tt> is a simple
status bar with an optional progress meter. It does not
have "contexts" like <tt class="CLASSNAME">
GtkStatusbar</tt>. <a href="z91.html#SEC-APPBAR">the
section called <i><tt class="CLASSNAME">
GnomeAppBar</tt></i> in the chapter called <i>The Main
Window: <tt class="CLASSNAME">GnomeApp</tt></i></a>
gives more details.
</p>
<div class="FIGURE">
<a name="Z394"></a>
<p>
<img src="figures/gnomeappbar.png">
</p>
<p>
<b>Figure 13. <tt class="CLASSNAME">GnomeAppBar</tt>
with the optional progress bar turned on.</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z395"><tt class="CLASSNAME">
GnomeDateEdit</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z396">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z397">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-dateedit.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z398">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeDateEdit</tt> allows the
user to edit a date and time. The time-editing part can
be turned off if you are only interested in the date.
</p>
<div class="FIGURE">
<a name="Z399"></a>
<p>
<img src="figures/gnomedateedit.png">
</p>
<p>
<b>Figure 14. <tt class="CLASSNAME">
GnomeDateEdit</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z400"><tt class="CLASSNAME">GtkCombo</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z401">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z402">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcombo.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z403">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkCombo</tt> is a text entry box
with a drop-down menu "quick choices." If you want to
limit the user to a fixed set of options, a <tt class=
"CLASSNAME">GtkOptionMenu</tt> is more appropriate. <tt
class="CLASSNAME">GtkCombo</tt> allows the user to type
in anything, but offers some suggestions as well. <tt
class="CLASSNAME">GnomeEntry</tt> is a combo box that
adds items the user types in to the list of choices in
the drop-down menu, and automatically remembers the
list from session to session.
</p>
<div class="FIGURE">
<a name="Z404"></a>
<p>
<img src="figures/gtkcombo.png">
</p>
<p>
<b>Figure 15. <tt class="CLASSNAME">GtkCombo</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z405"><tt class="CLASSNAME">GnomeEntry</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z406">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z407">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-entry.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z408">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeEntry</tt> is a <tt class=
"CLASSNAME">GtkCombo</tt> extension that uses the
drop-down menu as a history. If the user types
something which isn't in the history already, <tt
class="CLASSNAME">GnomeEntry</tt> adds it and saves it
in a configuration file to be loaded next time the
application starts up.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z409"><tt class="CLASSNAME">
GnomeFileEntry</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z410">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z411">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-file-entry.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z412">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeFileEntry</tt> is a <tt
class="CLASSNAME">GnomeEntry</tt> that keeps file names
in its history. It also has a "Browse" button which
pops up a <tt class="CLASSNAME">GtkFileSelection</tt>.
It has a "directories only" mode as well.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z413"><tt class="CLASSNAME">
GnomeNumberEntry</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z414">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z415">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gnome-number-entry.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z416">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeNumberEntry</tt> allows the
user to enter a number; it keeps a history of numbers
entered in its drop-down menu. It also has a
"Calculator" button to pop up a <tt class="CLASSNAME">
GnomeCalculator</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z417"><tt class="CLASSNAME">
GnomeProcBar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z418">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z419">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-procbar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z420">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeProcBar</tt> is used in a
Gnome panel applet that displays CPU and memory load,
and in the GTop application (a graphical <tt class=
"APPLICATION">top</tt> clone). It displays a colored
bar that can change length; it could be used to display
any kind of constantly-changing value.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z421"><tt class="CLASSNAME">
GtkStatusbar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z422">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z423">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtk.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z424">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkStatusbar</tt> is described in
<a href="z91.html#SEC-GTKSTATUSBAR">the section called
<i><tt class="CLASSNAME">GtkStatusbar</tt></i> in the
chapter called <i>The Main Window: <tt class=
"CLASSNAME">GnomeApp</tt></i></a>. It's a status bar
widget; it displays a line of text at the bottom of a
window.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z425"><tt class="CLASSNAME">GtkVBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z426">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z427">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkvbox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z428">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkVBox</tt> is a <tt class=
"CLASSNAME">GtkBox</tt> that packs widgets from top to
bottom. The top is considered the "start" of the box.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z429"><tt class="CLASSNAME">
GnomeCalculator</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z430">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z431">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-calculator.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z432">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeCalculator</tt> is a simple
calculator, implemented as a <tt class="CLASSNAME">
GtkWidget</tt>.
</p>
<div class="FIGURE">
<a name="Z433"></a>
<p>
<img src="figures/gnomecalculator.png">
</p>
<p>
<b>Figure 16. <tt class="CLASSNAME">
GnomeCalculator</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z434"><tt class="CLASSNAME">GnomeGuru</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z435">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z436">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-guru.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z437">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeGuru</tt> was an attempt to
implement a "wizard" widget (a series of pages
representing steps in a task that the user can step
through). It is an immature interface and should not be
used; at press time, it appears that a new widget
called <tt class="CLASSNAME">GnomeDruid</tt> will
replace it in the next version of Gnome. <tt class=
"CLASSNAME">GnomeDruide</tt> will most likely be
available as an add-on module before that, so look for
it if you need a wizard widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z438"><tt class="CLASSNAME">
GnomeIconEntry</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z439">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z440">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-icon-entry.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z441">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeIconEntry</tt> is similar to
<tt class="CLASSNAME">GnomeColorPicker</tt> and <tt
class="CLASSNAME">GnomeFontPicker</tt>. It's a button
displaying a currently-selected icon; when the button
is clicked, an icon browser dialog allows the user to
set a new icon. The widget used to have a text entry
for typing an icon filename, thus it is called <tt
class="CLASSNAME">GnomeIconEntry</tt> rather than <tt
class="CLASSNAME">GnomeIconPicker</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z442"><tt class="CLASSNAME">
GnomeIconSelection</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z443">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z444">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-icon-sel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z445">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeIconSelection</tt> browses
icon files; it's used by <tt class="CLASSNAME">
GnomeIconEntry</tt> but can also be used directly.
</p>
<div class="FIGURE">
<a name="Z446"></a>
<p>
<img src="figures/gnomeiconselection.png">
</p>
<p>
<b>Figure 17. <tt class="CLASSNAME">
GnomeIconSelection</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z447"><tt class="CLASSNAME">GnomeLess</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z448">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z449">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-less.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z450">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeLess</tt> is a simple
extension of <tt class="CLASSNAME">GtkText</tt> that
loads text from a file or file descriptor and displays
it. It is probably a good idea to avoid this widget;
because it isn't very useful, it is likely to disappear
from future versions of Gnome.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z451"><tt class="CLASSNAME">
GnomePaperSelector</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z452">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z453">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gnome-paper-selector.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z454">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomePaperSelector</tt> is
another widget worth avoiding; in the 1.0 release, it
is strictly experimental. It allows the user to select
the paper size for printing.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z455"><tt class="CLASSNAME">
GnomePixmapEntry</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z456">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z457">Header File</a>
</h3>
<p>
<tt class="FILENAME">
libgnomeui/gnome-pixmap-entry.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z458">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomePixmapEntry</tt> has
essentially the same purpose as <tt class="CLASSNAME">
GnomeIconEntry</tt>; it allows the user to select a
pixmap. The only reason you might prefer one to the
other is that <tt class="CLASSNAME">GnomeIconEntry</tt>
scales images to the standard Gnome icon size.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z459"><tt class="CLASSNAME">GnomeSpell</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z460">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z461">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-spell.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z462">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeSpell</tt> is a
spell-checker interface; it uses the <tt class=
"APPLICATION">ispell</tt> program internally. This
widget should be considered experimental and avoided in
production code.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z463"><tt class="CLASSNAME">
GtkColorSelection</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z464">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z465">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcolorsel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z466">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkColorSelection</tt> allows the
user to specify a color, using a color wheel or
sliders. It makes up the contents of <tt class=
"CLASSNAME">GtkColorSelectionDialog</tt> (<a href=
"z207.html#FIG-COLORSELDIALOG">Figure 1 in the section
called <i>Description</i></a>).
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z467"><tt class="CLASSNAME">
GtkGammaCurve</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z468">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z469">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkgamma.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z470">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkGammaCurve</tt> allows the
user to edit a curve; it's a very specialized widget
used in the Gimp. Few applications will have a use for
it.
</p>
<div class="FIGURE">
<a name="Z471"></a>
<p>
<img src="figures/gtkgammacurve.png">
</p>
<p>
<b>Figure 18. <tt class="CLASSNAME">
GtkGammaCurve</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z472"><tt class="CLASSNAME">
GtkButtonBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z473">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z474">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkbbox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z475">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkButtonBox</tt> is a special
kind of <tt class="CLASSNAME">GtkBox</tt> designed to
store the buttons of a dialog. It has horizontal and
vertical variants. <tt class="CLASSNAME">
GnomeDialog</tt> creates a button box for you, so there
is no need to use this widget directly when programming
with Gnome.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z476"><tt class="CLASSNAME">
GtkHButtonBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z477">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z478">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhbbox.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z479">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkHButtonBox</tt> is the
horizontal variant of <tt class="CLASSNAME">
GtkButtonBox</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z480"><tt class="CLASSNAME">
GtkVButtonBox</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z481">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z482">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtk.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z483">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkVButtonBox</tt> is the
vertical variant of <tt class="CLASSNAME">
GtkButtonBox</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z484"><tt class="CLASSNAME">GtkLayout</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z485">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z486">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtklayout.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z487">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkLayout</tt> creates the
illusion of a container with infinite size. Because X
windows are limited to 32,768 pixels in size (2^15),
most widgets also have a 32,768-pixel size limit (and
child widgets must be positioned within the parent's X
window). Naive widgets scroll by simply moving their
<span class="STRUCTNAME">GdkWindow</span>. <tt class=
"CLASSNAME">GtkLayout</tt> is more intelligent about
this.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z488"><tt class="CLASSNAME">GnomeCanvas</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z489">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z490">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-canvas.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z491">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeCanvas</tt> is extensively
discussed in <a href="cha-canvas.html">the chapter
called <i><tt class="CLASSNAME">
GnomeCanvas</tt></i></a>. It renders flicker-free
structured graphics, and is ideal for custom displays.
</p>
<div class="FIGURE">
<a name="Z492"></a>
<p>
<img src="figures/gnomecanvas.png">
</p>
<p>
<b>Figure 19. <tt class="CLASSNAME">
GnomeCanvas</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z493"><tt class="CLASSNAME">
GnomeIconList</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z494">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z495">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-icon-list.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z496">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeIconList</tt> is used in the
Gnome file manager. It displays icons and their names;
users can select groups of icons by rubberbanding.
</p>
<div class="FIGURE">
<a name="Z497"></a>
<p>
<img src="figures/gnomeiconlist.png">
</p>
<p>
<b>Figure 20. Gnome file manager, demonstrating <tt
class="CLASSNAME">GnomeIconList</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z498"><tt class="CLASSNAME">
GnomeDockBand</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z499">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z500">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-dock-band.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z501">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeDockBand</tt> contains one
row or column of <tt class="CLASSNAME">
GnomeDockItem</tt>s; a <tt class="CLASSNAME">
GnomeDock</tt> in turn contains one or more <tt class=
"CLASSNAME">GnomeDockBand</tt>s. See the <tt class=
"CLASSNAME">GnomeDockItem</tt> entry for details and a
screenshot.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z502"><tt class="CLASSNAME">GnomeDock</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z503">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z504">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-dock.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z505">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeDock</tt> collects <tt
class="CLASSNAME">GnomeDockBand</tt>s which in turn
hold <tt class="CLASSNAME">GnomeDockItem</tt>s. <tt
class="CLASSNAME">GnomeDock</tt> allows users to
reposition toolbars and other application components.
See the <tt class="CLASSNAME">GnomeDockItem</tt> entry
for details and a screenshot.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z506"><tt class="CLASSNAME">GtkCList</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z507">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z508">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkclist.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z509">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkCList</tt> is a
list-with-columns widget; it is also the base class for
<tt class="CLASSNAME">GtkCTree</tt>. <tt class=
"CLASSNAME">GtkCList</tt> displays text and/or a pixmap
in each cell; it <i class="EMPHASIS">cannot</i> hold
child widgets in its cells. <tt class="CLASSNAME">
GtkCList</tt> is only a container because it uses
widgets for the column headings. You may prefer <tt
class="CLASSNAME">GtkList</tt>, which can have child
widgets as list items, but is less efficient and has a
maximum list size of 32,768 pixels.
</p>
<div class="FIGURE">
<a name="Z510"></a>
<p>
<img src="figures/gtkclist.png">
</p>
<p>
<b>Figure 21. The Gnome file manager's list view uses
<tt class="CLASSNAME">GtkCList</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z511"><tt class="CLASSNAME">GtkCTree</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z512">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z513">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkctree.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z514">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkCTree</tt> is similar to <tt
class="CLASSNAME">GtkCList</tt>, but (unsurprisingly)
displays a tree with expandable nodes instead of a
simple list. <tt class="CLASSNAME">GtkTree</tt> is a
more flexible tree widget (it can have arbitrary
widgets in the tree cells), but it is less efficient
and limited to 32,768 pixels.
</p>
<div class="FIGURE">
<a name="Z515"></a>
<p>
<img src="figures/gtkctree.png">
</p>
<p>
<b>Figure 22. <tt class="CLASSNAME">GtkCTree</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z516"><tt class="CLASSNAME">GtkFixed</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z517">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z518">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkfixed.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z519">Description</a>
</h3>
<p>
The <tt class="CLASSNAME">GtkFixed</tt> container
allows you to position child widgets at absolute
coordinates, and always gives child widgets exactly
their requested size. This widget is for masochists; it
doesn't do anything automatically. You should almost
always use another layout widget instead (if you think
you need the fixed widget, consider asking for help;
most likely a real layout widget can be made to work
better).
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z520"><tt class="CLASSNAME">GtkNotebook</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z521">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z522">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtknotebook.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z523">Description</a>
</h3>
<p>
A notebook widget presents the user with several
"pages"; the user can move a page to the top by
selecting its "tab." Each child added to <tt class=
"CLASSNAME">GtkNotebook</tt> becomes a page; you can
also specify widgets to use for the tab labels. It is
generally considered bad practice to have more than a
single row of tabs, but <tt class="CLASSNAME">
GtkNotebook</tt> does allow it. It is also possible to
position the tabs on the left, right, or bottom of the
notebook, but you should always leave them on top for
interface consistency.
</p>
<div class="FIGURE">
<a name="Z524"></a>
<p>
<img src="figures/gtknotebook.png">
</p>
<p>
<b>Figure 23. <tt class="CLASSNAME">
GtkNotebook</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z525"><tt class="CLASSNAME">
GtkFontSelection</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z526">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z527">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkfontsel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z528">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkFontSelection</tt> is a
composite widget that allows the user to select a font
from among the fonts available on the system. <tt
class="CLASSNAME">GtkFontSelectionDialog</tt> contains
an instance of <tt class="CLASSNAME">
GtkFontSelection</tt>. Gnome applications should place
a <tt class="CLASSNAME">GtkFontSelection</tt> in a <tt
class="CLASSNAME">GnomeDialog</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z529"><tt class="CLASSNAME">GtkPaned</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z530">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z531">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkpaned.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z532">Description</a>
</h3>
<p>
The <tt class="CLASSNAME">GtkPaned</tt> widget divides
an area into two user-resizable sections. It has
horizontal and vertical variants.
</p>
<div class="FIGURE">
<a name="Z533"></a>
<p>
<img src="figures/gtkpaned.png">
</p>
<p>
<b>Figure 24. Horizontal and vertical <tt class=
"CLASSNAME">GtkPaned</tt> widgets</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z534"><tt class="CLASSNAME">GtkHPaned</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z535">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z536">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhpaned.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z537">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkHPaned</tt> is the horizontal
variant of <tt class="CLASSNAME">GtkPaned</tt>; it
allows the user to divide a horizontal space between
the <tt class="CLASSNAME">GtkHPaned</tt>'s two child
widgets.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z538"><tt class="CLASSNAME">GtkVPaned</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z539">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z540">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkvpaned.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z541">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkVPaned</tt> is the vertical
variant of <tt class="CLASSNAME">GtkPaned</tt>; it
allows the user to divide a vertical space between the
<tt class="CLASSNAME">GtkVPaned</tt>'s two child
widgets.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z542"><tt class="CLASSNAME">GtkList</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z543">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z544">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtklist.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z545">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkList</tt> displays a list of
items. Each item is a <tt class="CLASSNAME">
GtkListItem</tt>; <tt class="CLASSNAME">
GtkListItem</tt> is a container that can hold any kind
of widget. The size of a <tt class="CLASSNAME">
GtkList</tt> is limited, because list items are placed
at fixed coordinates in the list's <span class=
"STRUCTNAME">GdkWindow</span>, and scrolling is
achieved by moving the <span class="STRUCTNAME">
GdkWindow</span>; <span class="STRUCTNAME">
GdkWindow</span> has a maximum size of 32,768 pixels,
and any list item positioned outside that range is
invisible. <tt class="CLASSNAME">GtkCList</tt>
overcomes this limitation, but is unable to contain
arbitrary widgets.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z546"><tt class="CLASSNAME">
GtkMenuShell</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z547">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z548">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkmenushell.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z549">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkMenuShell</tt> is an abstract
base class for widgets that contain <tt class=
"CLASSNAME">GtkMenuItem</tt>s. Its two subclasses are
<tt class="CLASSNAME">GtkMenu</tt> and <tt class=
"CLASSNAME">GtkMenuBar</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z550"><tt class="CLASSNAME">GtkMenuBar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z551">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z552">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkmenubar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z553">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkMenuBar</tt> is a menu bar. It
contains one or more menu items; normally, each menu
item will have a submenu (i.e., a <tt class=
"CLASSNAME">GtkMenu</tt> with more menu items). For
example, the menu bar might have a menu item called
"File," with a submenu containing the menu items "Open"
and "Quit."
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z554"><tt class="CLASSNAME">GtkMenu</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z555">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z556">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkmenu.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z557">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkMenu</tt> contains menu items.
<tt class="CLASSNAME">GtkMenu</tt> is unique because it
should not be shown (with <tt class="FUNCTION">
gtk_widget_show()</tt>) by the programmer; menus are
popped up in response to user actions.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z558"><tt class="CLASSNAME">GtkPacker</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z559">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z560">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkpacker.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z561">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkPacker</tt> is a layout
container inspired by the Tk toolkit. If you're
familiar with that toolkit, you may find it easier to
use than the standard GTK+ layout containers.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z562"><tt class="CLASSNAME">GtkSocket</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z563">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z564">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtksocket.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z565">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkSocket</tt> is a "hole" in one
application that allows a <tt class="CLASSNAME">
GtkPlug</tt> from a second application to be embedded.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z566"><tt class="CLASSNAME">GtkTable</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z567">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z568">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktable.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z569">Description</a>
</h3>
<p>
<a href="sec-containers.html#SEC-GTKTABLE">the section
called <i><tt class="CLASSNAME">GtkTable</tt></i> in
the chapter called <i>GTK+ Basics</i></a> desribes <tt
class="CLASSNAME">GtkTable</tt> in some detail. It's
one of the most important GTK+ layout widgets.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z570"><tt class="CLASSNAME">GtkTed</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z571">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z572">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gtk-ted.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z573">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkTed</tt> is a relic from the
early days of Gnome; "ted" stands for "table editor."
It's a kind of primitive GUI builder. There are at
least two advanced projects to write good GUI builders
(Glade and GLE), so this widget should be ignored and
will disappear in a future version of <tt class=
"APPLICATION">libgnomeui</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z574"><tt class="CLASSNAME">GtkToolbar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z575">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z576">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktoolbar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z577">Description</a>
</h3>
<p>
No surprises here: <tt class="CLASSNAME">
GtkToolbar</tt> is a toolbar widget. Gnome applications
will usually use the Gnome helper functions instead of
creating a toolbar directly, as described in <a href=
"cha-main.html">the chapter called <i>The Main Window:
<tt class="CLASSNAME">GnomeApp</tt></i></a>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z578"><tt class="CLASSNAME">GtkTree</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z579">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z580">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktree.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z581">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkTree</tt> is to <tt class=
"CLASSNAME">GtkCTree</tt> as <tt class="CLASSNAME">
GtkList</tt> is to <tt class="CLASSNAME">GtkCList</tt>.
That is, <tt class="CLASSNAME">GtkTree</tt> is more
flexible than <tt class="CLASSNAME">
GtkCTree</tt>---tree items can contain any widget---
but it's also a bit slower than <tt class="CLASSNAME">
GtkCTree</tt> and holds only a limited number of items.
The maximum number of items depends on the height of
the rows; the total row height must fit inside a <span
class="STRUCTNAME">GdkWindow</span>, which means 32,768
pixels.
</p>
<div class="FIGURE">
<a name="Z582"></a>
<p>
<img src="figures/gtktree.png">
</p>
<p>
<b>Figure 25. <tt class="CLASSNAME">GtkTree</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z583"><tt class="CLASSNAME">
GnomeAnimator</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z584">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z585">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-animator.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z586">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeAnimator</tt> displays a
series of images, creating an animation. It has a "loop
mode" and a "play once" mode. The <tt class=
"CLASSNAME">GnomeAnimator</tt> API is marked "immature"
in Gnome 1.0 and may change incompatibly in future
versions; this is an experimental widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z587"><tt class="CLASSNAME">GnomePixmap</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z588">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z589">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-pixmap.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z590">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomePixmap</tt> should be
preferred to <tt class="CLASSNAME">GtkPixmap</tt>,
though it has the same purpose. <tt class="CLASSNAME">
GnomePixmap</tt> is a bit smarter about visuals. It can
also load images from many different formats, using
Imlib, so it's more convenient to use.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z591"><tt class="CLASSNAME">GnomeStock</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z592">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z593">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gnome-stock.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z594">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GnomeStock</tt> is a container
that wraps a <tt class="CLASSNAME">GnomePixmap</tt>; it
automatically creates "insensitive" and "focused"
copies of the pixmap to reflect the widget state. It
can be set to one of the Gnome stock pixmap macros,
such as <tt class="FUNCTION">
GNOME_STOCK_PIXMAP_CUT</tt> (small picture of
scissors), <tt class="FUNCTION">
GNOME_STOCK_PIXMAP_PRINT</tt> (a little printer), etc.
You can also register new stock pixmaps specific to
your application at runtime. Gnome uses this widget
internally when creating menus and toolbars using a
<span class="STRUCTNAME">GnomeUIInfo</span> template
(see <a href="sec-gnomeuiinfo.html">the section called
<i>Menus and Toolbars with <span class="STRUCTNAME">
GnomeUIInfo</span></i> in the chapter called <i>The
Main Window: <tt class="CLASSNAME">
GnomeApp</tt></i></a>).
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z595"><tt class="CLASSNAME">GtkMisc</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z596">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z597">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkmisc.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z598">Description</a>
</h3>
<p>
The descriptively-named (or not) <tt class="CLASSNAME">
GtkMisc</tt> abstract base class allows you to set the
"alignment" and "padding" of its subclasses. <i class=
"FIRSTTERM">Alignment</i> is a float between 0.0 and
1.0, where 0.0 is left-justified, 0.5 is centered, and
1.0 is right-justified. Alignment only matters if a <tt
class="CLASSNAME">GtkMisc</tt> receives a size
allocation larger than its size request; the alignment
locates the natural bounding box of the widget within
its actual bounding box. <i class="FIRSTTERM">
Padding</i> is a number of pixels to add to the
widget's size request. The widget will then leave those
pixels blank.
</p>
<p>
Widgets that do not derive from <tt class="CLASSNAME">
GtkMisc</tt> can be made "alignable" in the same way by
placing them in a <tt class="CLASSNAME">
GtkAlignment</tt> container.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z599"><tt class="CLASSNAME">GtkLabel</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z600">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z601">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtklabel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z602">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkLabel</tt> simply displays a
text string. If the text string contains newlines, <tt
class="CLASSNAME">GtkLabel</tt> displays multiple
lines. Labels honor the alignment parameter from their
parent class (<tt class="CLASSNAME">GtkMisc</tt>); you
can use this to center the text, or move it to the left
or right. Alignment is not the same as justification.
Justification defines the position of multiple lines
with respect to each other. Left-justified means each
line starts in the same place, right-justified means
each ends in the same place, center-justified means
each is centered around the same imaginary line.
Justification has no meaning for one-line labels.
Alignment set with <tt class="FUNCTION">
gtk_misc_set_alignment()</tt> positions the entire
block of text within its size allocation; alignment
only matters if the label receives more space than it
requested (it will request just enough to hold the text
block). Labels are <span class="STRUCTNAME">
GTK_NO_WINDOW</span> widgets (which means they don't
receive events and draw on their parent's background).
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z603"><tt class="CLASSNAME">
GtkAccelLabel</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z604">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z605">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkaccellabel.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z606">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkAccelLabel</tt> is associated
with some other widget, and displays the accelerator
key for that widget as part of the label.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z607"><tt class="CLASSNAME">GtkClock</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z608">Library</a>
</h3>
<p>
Gnome
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z609">Header File</a>
</h3>
<p>
<tt class="FILENAME">libgnomeui/gtk-clock.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z610">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkClock</tt> is a label that
displays a time. It can optionally update the time
periodically (just like a clock!).
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z611"><tt class="CLASSNAME">
GtkTipsQuery</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z612">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z613">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktipsquery.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z614">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkTipsQuery</tt> is a label that
displays tooltips. It also has "What's This?"
functionality. You call <tt class="FUNCTION">
gtk_tips_query_start()</tt> to switch to "query mode."
In query mode, the cursor is changed to a question
mark; as the mouse moves over widgets in the
application, the <tt class="CLASSNAME">
GtkTipsQuery</tt> displays their tooltips. <tt class=
"CLASSNAME">GtkTipsQuery</tt> emits a <span class=
"SYMBOL">"widget_selected"</span> signal if the user
clicks on a widget; you can use this to display more
extensive help for that widget. You might store the
more extensive help as the "private" component of a
<span class="STRUCTNAME">GtkTooltip</span>, or you
might use <tt class="FUNCTION">
gtk_object_set_data()</tt> to store some kind of
application-specific help information.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z615"><tt class="CLASSNAME">GtkArrow</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z616">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z617">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkarrow.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z618">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkArrow</tt> displays an arrow.
It's a very simple <span class="STRUCTNAME">
GTK_NO_WINDOW</span> widget and doesn't even receive
events. In the default theme, an arrow is simply a
triangle.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z619"><tt class="CLASSNAME">GtkImage</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z620">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z621">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkimage.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z622">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkImage</tt> displays a <span
class="STRUCTNAME">GdkImage</span> in a widget. It's
only useful if you already have a <span class=
"STRUCTNAME">GdkImage</span>; to display a fixed image
you usually want <tt class="CLASSNAME">
GnomePixmap</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z623"><tt class="CLASSNAME">GtkPixmap</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z624">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z625">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkpixmap.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z626">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkPixmap</tt> displays a <span
class="STRUCTNAME">GdkPixmap</span>. If you're using
Gnome, prefer <tt class="CLASSNAME">GnomePixmap</tt>
for the reasons given in its description.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z627"><tt class="CLASSNAME">GtkCalendar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z628">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z629">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcalendar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z630">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkCalendar</tt> displays a
calendar page (one month). It allows users to select a
date. <tt class="CLASSNAME">GnomeDateEdit</tt> uses <tt
class="CLASSNAME">GtkCalendar</tt> in a popup menu.
</p>
<div class="FIGURE">
<a name="Z631"></a>
<p>
<img src="figures/gtkcalendar.png">
</p>
<p>
<b>Figure 26. <tt class="CLASSNAME">GtkCalendar</tt>
is Y2K compliant!</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z632"><tt class="CLASSNAME">
GtkDrawingArea</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z633">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z634">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkdrawingarea.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z635">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkDrawingArea</tt> is a thin
wrapper around <span class="STRUCTNAME">
GdkWindow</span>; it gives you a blank area to draw on.
Normally, you would connect to its <span class=
"SYMBOL">"configure_event"</span> signal to catch
changes in the size of the area, and do your drawing in
an <span class="SYMBOL">"expose_event"</span> handler.
To eliminate flicker, you might keep a <span class=
"STRUCTNAME">GdkPixmap</span> equal in size to the
drawing area, and draw to the pixmap; in your <span
class="SYMBOL">"expose_event"</span> handler, simply
copy the exposed region from the pixamp to the drawing
area.
</p>
<p>
For high-level graphics, <tt class="CLASSNAME">
GnomeCanvas</tt> can be much more convenient to use.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z636"><tt class="CLASSNAME">GtkCurve</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z637">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z638">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkcurve.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z639">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkCurve</tt> is used to display
the curve in the <tt class="CLASSNAME">
GtkGammaCurve</tt> widget. It's a drawing area
extension with curve-drawing abilities. Most likely you
won't find a use for this widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z640"><tt class="CLASSNAME">GtkDial</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z641">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z642">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkdial.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z643">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkDial</tt> is a "speedometer"
display. By default, the user can drag the "needle"
around, changing the dial's value. <tt class=
"CLASSNAME">GtkDial</tt> also has a "view only" mode.
</p>
<div class="FIGURE">
<a name="Z644"></a>
<p>
<img src="figures/gtkdial.png">
</p>
<p>
<b>Figure 27. The <tt class="CLASSNAME">GtkDial</tt>
widget</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z645"><tt class="CLASSNAME">GtkEditable</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z646">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z647">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkeditable.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z648">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkEditable</tt> is an abstract
base class for widgets that allow the user to edit
text. The base class interface allows cursor
positioning, retrieving characters, and so on. It also
includes the <span class="SYMBOL">"changed"</span>
signal, which you can use to detect user input.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z649"><tt class="CLASSNAME">GtkEntry</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z650">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z651">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkentry.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z652">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkEntry</tt> allows the user to
enter a single line of text. It has a "password" mode;
in "password" mode the text in the entry is replaced by
asterisks.
</p>
<div class="FIGURE">
<a name="Z653"></a>
<p>
<img src="figures/gtkentry.png">
</p>
<p>
<b>Figure 28. <tt class="CLASSNAME">GtkEntry</tt>
allows the user to enter a line of text</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z654"><tt class="CLASSNAME">
GtkSpinButton</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z655">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z656">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkspinbutton.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z657">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkSpinButton</tt> is a <tt
class="CLASSNAME">GtkEntry</tt> customized to allow the
user to enter a number. Spin buttons add up and down
arrows to the entry, so the user can rapidly spin
through the possible values.
</p>
<div class="FIGURE">
<a name="Z658"></a>
<p>
<img src="figures/gtkspinbutton.png">
</p>
<p>
<b>Figure 29. ><tt class=
"CLASSNAME">GtkSpinButton</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z659"><tt class="CLASSNAME">GtkText</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z660">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z661">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtktext.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z662">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkText</tt> is a text widget. It
can display text, and offers simple text-editing
facilities.
</p>
<p>
Two questions about the text widget are <i class=
"EMPHASIS">very</i> frequently asked on the GTK+
mailing lists. These are:
</p>
<ul>
<li>
<p>
Does the text widget support horizontal
scrolling?
</p>
</li>
<li>
<p>
The text widget doesn't seem to be very powerful.
Are there plans to replace it?
</p>
</li>
</ul>
<p>
The text widget does not support horizontal scrolling;
instead, it wraps lines. It is not very powerful, and
the code is difficult to maintain; it will most likely
be replaced in Gtk 1.4 as part of the move to Unicode.
</p>
<div class="FIGURE">
<a name="Z663"></a>
<p>
<img src="figures/gtktext.png">
</p>
<p>
<b>Figure 30. <tt class="CLASSNAME">GtkText</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z664"><tt class="CLASSNAME">GtkRuler</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z665">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z666">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkruler.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z667">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkRuler</tt> is an abstract base
class for the horizontal and vertical ruler widgets.
The ruler widgets are used in the GIMP to display image
dimensions.
</p>
<div class="FIGURE">
<a name="Z668"></a>
<p>
<img src="figures/ruler-gimp.png">
</p>
<p>
<b>Figure 31. <tt class="CLASSNAME">GtkHRuler</tt>
and <tt class="CLASSNAME">GtkVRuler</tt>, as used in
the GIMP</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z669"><tt class="CLASSNAME">GtkHRuler</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z670">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z671">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhruler.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z672">Description</a>
</h3>
<p>
Horizontal variant of <tt class="CLASSNAME">
GtkRuler</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z673"><tt class="CLASSNAME">GtkVRuler</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z674">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z675">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkvruler.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z676">Description</a>
</h3>
<p>
Vertical variant of <tt class="CLASSNAME">
GtkRuler</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z677"><tt class="CLASSNAME">GtkRange</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z678">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z679">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkrange.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z680">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkRange</tt> is an abstract base
class for "slider" widgets. These widgets modify some
numeric value as a "slider" is moved in a "trough." The
two subclasses of <tt class="CLASSNAME">GtkRange</tt>
are <tt class="CLASSNAME">GtkScale</tt>, used to allow
the user to enter a numeric value, and <tt class=
"CLASSNAME">GtkScrollbar</tt>, the GTK+ scrollbar
widget.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z681"><tt class="CLASSNAME">GtkScale</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z682">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z683">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkscale.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z684">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkScale</tt> allows the user to
enter a numeric value by moving a slider. It can
display the current value above the slider; you can
turn this off if the exact value isn't relevant, or you
want to provide feedback in some other way. <tt class=
"CLASSNAME">GtkScale</tt> is an abstract base class;
you must instantiate its vertical or horizontal
variant.
</p>
<div class="FIGURE">
<a name="Z685"></a>
<p>
<img src="figures/gtkscale.png">
</p>
<p>
<b>Figure 32. The <tt class="CLASSNAME">GtkScale</tt>
widget</b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z686"><tt class="CLASSNAME">GtkHScale</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z687">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z688">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhscale.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z689">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkHScale</tt> is the horizontal
variant of <tt class="CLASSNAME">GtkScale</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z690"><tt class="CLASSNAME">GtkVScale</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z691">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z692">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkvscale.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z693">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkVScale</tt> is the vertical
variant of <tt class="CLASSNAME">GtkScale</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z694"><tt class="CLASSNAME">
GtkScrollbar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z695">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z696">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkscrollbar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z697">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkScrollbar</tt> is an abstract
base class, giving horizontal and vertical scrollbars a
common interface.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z698"><tt class="CLASSNAME">
GtkHScrollbar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z699">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z700">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhscrollbar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z701">Description</a>
</h3>
<p>
A horizontal scrollbar.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z702"><tt class="CLASSNAME">
GtkVScrollbar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z703">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z704">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkvscrollbar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z705">Description</a>
</h3>
<p>
A vertical scrollbar.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z706"><tt class="CLASSNAME">
GtkSeparator</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z707">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z708">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkseparator.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z709">Description</a>
</h3>
<p>
The <tt class="CLASSNAME">GtkSeparator</tt> widget is a
divider line you can use to make your interface more
attractive. For example, a <tt class="CLASSNAME">
GtkHSeparator</tt> is used to divide the contents of a
<tt class="CLASSNAME">GnomeDialog</tt> from its
buttons.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z710"><tt class="CLASSNAME">
GtkHSeparator</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z711">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z712">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkhseparator.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z713">Description</a>
</h3>
<p>
Horizontal <tt class="CLASSNAME">GtkSeparator</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z714"><tt class="CLASSNAME">
GtkVSeparator</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z715">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z716">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkvseparator.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z717">Description</a>
</h3>
<p>
Vertical <tt class="CLASSNAME">GtkSeparator</tt>.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z718"><tt class="CLASSNAME">GtkPreview</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z719">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z720">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkpreview.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z721">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkPreview</tt> displays an RGB
image; the GIMP uses it to display a preview of the
effects of an image transformation.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z722"><tt class="CLASSNAME">GtkProgress</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z723">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z724">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkprogress.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z725">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkProgress</tt> is an abstract
base class for progress displays. In GTK+ 1.2 only one
concrete subclass exists (<tt class=
"CLASSNAME">GtkProgressBar</tt>). Future versions of
GTK+ may add additional progress widgets.
</p>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z726"><tt class="CLASSNAME">
GtkProgressBar</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z727">Library</a>
</h3>
<p>
GTK+
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z728">Header File</a>
</h3>
<p>
<tt class="FILENAME">gtk/gtkprogressbar.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z729">Description</a>
</h3>
<p>
<tt class="CLASSNAME">GtkProgressBar</tt> is a flexible
progress bar widget. It can display text over the
progress bar, and has an "activity" mode to indicate
"activity, but unknown total task size." In "activity"
mode a small block moves back and forth. <tt class=
"CLASSNAME">GtkProgressBar</tt> is probably excessively
configurable; you should try to use its default
look-and-feel, for consistency with other applications.
</p>
<div class="FIGURE">
<a name="Z730"></a>
<p>
<img src="figures/gtkprogressbar.png">
</p>
<p>
<b>Figure 33. <tt class="CLASSNAME">
GtkProgressBar</tt></b>
</p>
</div>
</div>
</div>
<div class="SECT2">
<h2 class="SECT2">
<a name="Z731"><tt class="CLASSNAME">ZvtTerm</tt></a>
</h2>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z732">Library</a>
</h3>
<p>
Zvt
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z733">Header File</a>
</h3>
<p>
<tt class="FILENAME">zvt/zvtterm.h</tt>
</p>
</div>
<div class="SECT3">
<h3 class="SECT3">
<a name="Z734">Description</a>
</h3>
<p>
<tt class="CLASSNAME">ZvtTerm</tt> comes with <tt
class="APPLICATION">gnome-libs</tt> but is not in <tt
class="APPLICATION">libgnomeui</tt>. It's in a separate
<tt class="APPLICATION">libzvt</tt>. <tt class=
"CLASSNAME">ZvtTerm</tt> is simply a terminal emulator;
you can spawn a child process to run inside the widget
and interact with the user. <tt class="CLASSNAME">
ZvtTerm</tt> provides all the functionality of the <tt
class="APPLICATION">gnome-terminal</tt> program that
comes with the Gnome desktop environment.
</p>
<div class="FIGURE">
<a name="Z735"></a>
<p>
<img src="figures/gnome-terminal.png">
</p>
<p>
<b>Figure 34. <tt class="APPLICATION">
gnome-terminal</tt> uses the <tt class="CLASSNAME">
ZvtTerm</tt> widget</b>
</p>
</div>
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