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-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for Gtk+/Gnome --
-- --
-- Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet --
-- Copyright (C) 2000-2006 AdaCore --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public --
-- License as published by the Free Software Foundation; either --
-- version 2 of the License, or (at your option) any later version. --
-- --
-- This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public --
-- License along with this library; if not, write to the --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-----------------------------------------------------------------------
-- <description>
--
-- This widget provides an empty canvas on which the application can draw
-- anything.
-- Note that this widget is simply an empty space, and that you need to
-- connect it to events to make it useful. For instance, you might want to do
-- one of the following :
--
-- * Connect it to "expose_event": The handlers are called every time the
-- widget needs to be redrawn. You can then draw anything you want on the
-- canvas, after getting its associated window with a call to
-- Gtk.Widget.Get_Window. Note that the event mask is automatically set up
-- to accept expose_events.
--
-- * Connect it to "button_press_event" and "button_release_event" events,
-- when you want it to react to user input. Note that you need to set up the
-- event mask with a call to Gtk.Widget.Set_Events.
--
-- See also the Double_Buffer widget provided in the GtkAda examples for an
-- advanced example that demonstrates how to use double buffering, to avoid
-- flickering in your drawings.
--
-- </description>
-- <c_version>2.8.17</c_version>
-- <group>Drawing</group>
-- <testgtk>libart_demo.adb</testgtk>
with Gtk.Widget;
package Gtk.Drawing_Area is
type Gtk_Drawing_Area_Record is new
Gtk.Widget.Gtk_Widget_Record with private;
type Gtk_Drawing_Area is access all Gtk_Drawing_Area_Record'Class;
procedure Gtk_New (Drawing_Area : out Gtk_Drawing_Area);
-- Create a new blank Drawing_Area.
-- Note that the background of the widget is uninitialized, and that you
-- have to draw on it yourself.
procedure Initialize (Drawing_Area : access Gtk_Drawing_Area_Record'Class);
-- Internal initialization function.
-- See the section "Creating your own widgets" in the documentation.
function Get_Type return Gtk.Gtk_Type;
-- Return the internal value associated with a Gtk_Drawing_Area.
-----------------
-- Obsolescent --
-----------------
-- All subprograms below are now obsolescent in gtk+. They might be removed
-- from future versions of gtk+ (and therefore GtkAda).
-- To find out whether your code uses any of these, we recommend compiling
-- with the -gnatwj switch
-- <doc_ignore>
procedure Size
(Darea : access Gtk_Drawing_Area_Record;
Width : Gint;
Height : Gint);
pragma Obsolescent; -- Size
-- Request a new size for the area.
-- This queues a resize request for the area.
-- </doc_ignore>
----------------
-- Properties --
----------------
-- <properties>
-- The following properties are defined for this widget. See
-- Glib.Properties for more information on properties.
--
-- </properties>
-------------
-- Signals --
-------------
-- <signals>
-- The following new signals are defined for this widget:
-- </signals>
private
type Gtk_Drawing_Area_Record is new Gtk.Widget.Gtk_Widget_Record
with null record;
pragma Import (C, Get_Type, "gtk_drawing_area_get_type");
end Gtk.Drawing_Area;
|
