#!/usr/bin/env python#this is a simple translation of the scribble example that comes with GTK+import gtkpixmap = Nonedef configure_event(widget, event):    global pixmap    win = widget.window    width, height = win.get_size()    pixmap = gtk.gdk.Pixmap(win, width, height)    pixmap.draw_rectangle(widget.get_style().white_gc, True,                          0, 0, width, height)    return Truedef expose_event(widget, event):    x, y, width, height = event.area    gc = widget.get_style().fg_gc[gtk.STATE_NORMAL]    widget.window.draw_drawable(gc, pixmap, x, y, x, y, width, height)    return Falsedef draw_brush(widget, x, y):    x, y = int(x), int(y)    pixmap.draw_rectangle(widget.get_style().black_gc, True,                          x-5, y-5, 10, 10)    widget.queue_draw()def button_press_event(widget, event):    if event.button == 1 and pixmap != None:        draw_brush(widget, event.x, event.y)    return Truedef motion_notify_event(widget, event):    if event.is_hint:        x, y, state = event.window.get_pointer()    else:        x = event.x; y = event.y        state = event.state    if state & gtk.gdk.BUTTON1_MASK and pixmap != None:        draw_brush(widget, x, y)    return Truedef main():    win = gtk.Window()    win.set_name("Test Input")    win.connect("destroy", lambda w: gtk.main_quit())    win.set_border_width(5)    vbox = gtk.VBox(spacing=3)    win.add(vbox)    vbox.show()    drawing_area = gtk.DrawingArea()    drawing_area.set_size_request(200, 200)    vbox.pack_start(drawing_area)    drawing_area.show()    drawing_area.connect("expose_event", expose_event)    drawing_area.connect("configure_event", configure_event)    drawing_area.connect("motion_notify_event", motion_notify_event)    drawing_area.connect("button_press_event", button_press_event)    drawing_area.set_events(gtk.gdk.EXPOSURE_MASK |                            gtk.gdk.LEAVE_NOTIFY_MASK |                            gtk.gdk.BUTTON_PRESS_MASK |                            gtk.gdk.POINTER_MOTION_MASK |                            gtk.gdk.POINTER_MOTION_HINT_MASK)    button = gtk.Button(stock=gtk.STOCK_QUIT)    vbox.pack_start(button, expand=False, fill=False)    button.connect("clicked", lambda widget, win=win: win.destroy())    button.show()    win.show()    gtk.main()if __name__ == '__main__':    main()