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<html>
<head>
<meta name="description" content="Pmw - a toolkit for building high-level compound widgets in Python">
<meta name="content" content="python, megawidget, mega widget, compound widget, gui, tkinter">
<title>Pmw.HistoryText reference manual</title>
</head>
<body bgcolor="#ffffff" text="#000000" link="#0000ee"
vlink="551a8b" alink="ff0000">
<h1 ALIGN="CENTER">Pmw.HistoryText</h1>
<p>
<dl>
<dt> <h3>Name</h3><dd>
<p>Pmw.HistoryText() - ...</p>
<dt> <h3>Inherits</h3><dd>
<a href="ScrolledText.html">Pmw.ScrolledText</a><br>
<dt> <h3>Description</h3><dd>
<p>...</p>
<dt> <h3>Options</h3><dd>
Options for this megawidget and its base
classes are described below.<p>
<a name=option.borderframe></a>
<dl><dt> <strong>borderframe
</strong><dd>
Initialisation option. If true, the <strong>borderframe</strong> component will be created. The default is <strong>0</strong>.</p>
</dt></dl>
<a name=option.hscrollmode></a>
<dl><dt> <strong>hscrollmode
</strong><dd>
The horizontal scroll mode. If <strong>'none'</strong>, the horizontal scrollbar
will never be displayed. If <strong>'static'</strong>, the scrollbar will always
be displayed. If <strong>'dynamic'</strong>, the scrollbar will be displayed
only if necessary. The default is <strong>'dynamic'</strong>.</p>
</dt></dl>
<a name=option.labelmargin></a>
<dl><dt> <strong>labelmargin
</strong><dd>
Initialisation option. If the <strong>labelpos</strong> option is not <strong>None</strong>, this specifies the
distance between the <strong>label</strong> component and the rest of the
megawidget. The default is <strong>0</strong>.</p>
</dt></dl>
<a name=option.labelpos></a>
<dl><dt> <strong>labelpos
</strong><dd>
Initialisation option. Specifies where to place the <strong>label</strong> component. If not
<strong>None</strong>, it should be a concatenation of one or two of the
letters <strong>'n'</strong>, <strong>'s'</strong>, <strong>'e'</strong> and <strong>'w'</strong>. The first letter
specifies on which side of the megawidget to place the label.
If a second letter is specified, it indicates where on that
side to place the label. For example, if <strong>labelpos</strong> is <strong>'w'</strong>,
the label is placed in the center of the left hand side; if
it is <strong>'wn'</strong>, the label is placed at the top of the left
hand side; if it is <strong>'ws'</strong>, the label is placed at the
bottom of the left hand side.</p>
<p> If <strong>None</strong>, a label component is not created. The default is <strong>None</strong>.</p>
</dt></dl>
<a name=option.scrollmargin></a>
<dl><dt> <strong>scrollmargin
</strong><dd>
Initialisation option. The distance between the scrollbars and the text widget. The default is <strong>2</strong>.</p>
</dt></dl>
<a name=option.statechangecmd></a>
<dl><dt> <strong>statechangecmd
</strong><dd>
The default is <strong>None</strong>.</p>
</dt></dl>
<a name=option.usehullsize></a>
<dl><dt> <strong>usehullsize
</strong><dd>
Initialisation option. If true, the size of the megawidget is determined solely by the
width and height options of the <strong>hull</strong> component.</p>
<p> Otherwise, the size of the megawidget is determined by the width
and height of the <strong>text</strong> component, along with the size and/or
existence of the other components, such as the label, the
scrollbars and the scrollmargin option. All these affect the
overall size of the megawidget. The default is <strong>0</strong>.</p>
</dt></dl>
<a name=option.vscrollmode></a>
<dl><dt> <strong>vscrollmode
</strong><dd>
The vertical scroll mode. If <strong>'none'</strong>, the vertical scrollbar
will never be displayed. If <strong>'static'</strong>, the scrollbar will always
be displayed. If <strong>'dynamic'</strong>, the scrollbar will be displayed
only if necessary. The default is <strong>'dynamic'</strong>.</p>
</dt></dl>
<dt> <h3>Components</h3><dd>
Components created by this megawidget and its base
classes are described below.<p>
<a name=component.borderframe></a>
<dl><dt> <strong>borderframe
</strong><dd>
A frame widget which snuggly fits around the text widget, to give
the appearance of a text border. It is created with a border so
that the text widget, which is created without a border, looks
like it has a border. By default, this component is a Tkinter.Frame.</p>
</dt></dl>
<a name=component.horizscrollbar></a>
<dl><dt> <strong>horizscrollbar
</strong><dd>
The horizontal scrollbar. By default, this component is a Tkinter.Scrollbar. Its component group is <strong>Scrollbar</strong>.</p>
</dt></dl>
<a name=component.hull></a>
<dl><dt> <strong>hull
</strong><dd>
This acts as the body for the entire megawidget. Other components
are created as children of the hull to further specialise the
widget. By default, this component is a Tkinter.Frame.</p>
</dt></dl>
<a name=component.label></a>
<dl><dt> <strong>label
</strong><dd>
If the <strong>labelpos</strong> option is not <strong>None</strong>, this component is
created as a text label for the megawidget. See the
<strong>labelpos</strong> option for details. Note that to set, for example,
the <strong>text</strong> option of the label, you need to use the <strong>label_text</strong>
component option. By default, this component is a Tkinter.Label.</p>
</dt></dl>
<a name=component.text></a>
<dl><dt> <strong>text
</strong><dd>
The text widget which is scrolled by the scrollbars. If the
<strong>borderframe</strong> option is true, this is created with a borderwidth
of <strong>0</strong> to overcome a known problem with text widgets: if a widget
inside a text widget extends across one of the edges of the text
widget, then the widget obscures the border of the text widget.
Therefore, if the text widget has no border, then this overlapping
does not occur. By default, this component is a Tkinter.Text.</p>
</dt></dl>
<a name=component.vertscrollbar></a>
<dl><dt> <strong>vertscrollbar
</strong><dd>
The vertical scrollbar. By default, this component is a Tkinter.Scrollbar. Its component group is <strong>Scrollbar</strong>.</p>
</dt></dl>
<a name=methods></a>
<dt> <h3>Methods</h3><dd>
Only methods specific to this megawidget are described below.
For a description of its inherited methods, see the
manuals for its base classes.
<p>
<a name=method.addhistory></a>
<dl><dt> <strong>addhistory</strong>()<dd>
<p></p>
</dt></dl>
<a name=method.gethistory></a>
<dl><dt> <strong>gethistory</strong>()<dd>
<p></p>
</dt></dl>
<a name=method.next></a>
<dl><dt> <strong>next</strong>()<dd>
<p></p>
</dt></dl>
<a name=method.prev></a>
<dl><dt> <strong>prev</strong>()<dd>
<p></p>
</dt></dl>
<a name=method.redo></a>
<dl><dt> <strong>redo</strong>()<dd>
<p></p>
</dt></dl>
<a name=method.undo></a>
<dl><dt> <strong>undo</strong>()<dd>
<p></p>
</dt></dl>
<dt> <h3>Example</h3><dd>
Example code using Pmw.HistoryText.<p>
<pre>
class Demo:
def __init__(self, parent):
# Create and pack the PanedWidget to hold the query and result
# windows.
# !! panedwidget should automatically size to requested size
panedWidget = Pmw.PanedWidget(parent,
orient = 'vertical',
hull_height = 400,
hull_width = 450)
panedWidget.add('query', min = 0.05, size = 0.2)
panedWidget.add('buttons', min = 0.1, max = 0.1)
panedWidget.add('results', min = 0.05)
panedWidget.pack(fill = 'both', expand = 1)
# Create and pack the HistoryText.
self.historyText = Pmw.HistoryText(panedWidget.pane('query'),
text_wrap = 'none',
text_width = 60,
text_height = 10,
statechangecmd = self.statechange,
)
self.historyText.pack(fill = 'both', expand = 1)
self.historyText.statechangecmd = self.statechange
self.historyText.component('text').focus()
buttonList = (
['Prev', self.historyText.prev],
['Next', self.historyText.next],
['Search', Pmw.busycallback(self.search)],
['Clear', self.clear],
['Undo', self.historyText.undo],
['Redo', self.historyText.redo],
)
self.buttonDict = {}
for text, cmd in buttonList:
button = Tkinter.Button(panedWidget.pane('buttons'),
text = text, command = cmd)
button.pack(side = 'left')
self.buttonDict[text] = button
for text in ('Prev', 'Next'):
self.buttonDict[text].configure(state = 'disabled')
self.results = Pmw.ScrolledText(panedWidget.pane('results'), text_wrap = 'none')
self.results.pack(fill = 'both', expand = 1)
def statechange(self, prevstate, nextstate):
self.buttonDict['Prev'].configure(state = prevstate)
self.buttonDict['Next'].configure(state = nextstate)
def clear(self):
self.historyText.delete('1.0', 'end')
def addnewlines(self, text):
if len(text) == 1:
text = text + '\n'
if text[-1] != '\n':
text = text + '\n'
if text[-2] != '\n':
text = text + '\n'
return text
def search(self):
sql = self.historyText.get()
self.results.insert('end', self.addnewlines(sql))
self.results.see('end')
self.results.update_idletasks()
self.historyText.addhistory()
deleteSemiColon = '[\n;]+$'
results = 'foo'
if len(results) > 0:
self.results.insert('end', self.addnewlines(results))
self.results.see('end')
</pre>
</dl>
<center><P ALIGN="CENTER">
<IMG SRC = blue_line.gif ALT = "" WIDTH=320 HEIGHT=5>
</p></center>
<font size=-1>
<center><P ALIGN="CENTER">
<a href="index.html">Home</a>.
Pmw 0.8.5
Maintainer
<a href="mailto:gregm@iname.com">gregm@iname.com</a>.
9 Feb 2001
</p></center>
</font>
</body>
</html>
|
