gtk.DrawingArea类

hitguy

最近用到了这个，特意把这个粘下来。
gtk.DrawingArea
gtk.DrawingArea — a widget for custom user interface elements.
Synopsis
class gtk.DrawingArea(
gtk.Widget
):
   
gtk.DrawingArea
()
Ancestry+-- gobject.GObject
  +--
gtk.Object
    +--
gtk.Widget
      +--
gtk.DrawingArea
Implemented Interfaces
gtk.DrawingArea
implements
gtk.Buildable

gtk.DrawingArea Properties
gtk.Object Properties
gtk.Widget Properties
gtk.DrawingArea Style Properties
gtk.Widget Style Properties
gtk.DrawingArea Signal Prototypes
gobject.GObject Signal Prototypes
gtk.Object Signal Prototypes
gtk.Widget Signal Prototypes
Description
The
gtk.DrawingArea
widget is used for creating custom user interface elements. It's essentially a blank widget containing a
gtk.gdk.Window
that you can draw on. The contained
gtk.gdk.Window
is accessed using the
gtk.Widget
"window" attribute as:
  gdkwindow = drawingarea.window
Since a
gtk.gdk.Window
is a subclass of
gtk.gdk.Drawable
, all of the
gtk.gdk.Drawable
methods are available for drawing on the
gtk.DrawingArea
's gdkwindow.
After creating a drawing area, the application may want to connect to:

Mouse and button press signals to respond to input from the user. Use the
gtk.Widget.add_events()
method to enable events you wish to receive. To receive keyboard events, you will need to set the gtk.CAN_FOCUS flag on the drawing area

The "realize" signal to take any necessary actions when the widget is instantiated on a particular display.

The "configure_event" signal to take any necessary actions when the widget changes size.

The "expose_event" signal to handle redrawing the contents of the widget when a drawing area first comes on screen, or when it's covered by another window and then uncovered (exposed). You can also force an expose event by adding to the "damage region" of the drawing area's window using the
gtk.Widget.queue_draw_area()
method.

See the
Drawing Area
chapter in the tutorial for more information on using a
gtk.DrawingArea
.
Sometimes a
gtk.Image
is a useful alternative to a drawing area. You can put a
gtk.gdk.Pixmap
in the
gtk.Image
and draw to the
gtk.gdk.Pixmap
, calling the
gtk.Widget.queue_draw()
method on the
gtk.Image
when you want to refresh to the screen.
Constructor    gtk.DrawingArea()
Returns :
a new drawingarea widget

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u1/48817/showart_722845.html