cannot draw green rectangle on GdkWindow(GtkDrawingArea.window)

[Todong Ma <gbstack08 gmail com>]

Hi,everyone.I want to draw green rectangle on a drawable,following is my
code:


*import gobject
import gtk
import pygtk

def expose(widget,event):
  x,y,width,height = event.area
  green = gtk.gdk.Color(0,10000,0)
  gc = gtk.gdk.GC(widget.window)
  gc.set_foreground(green)
  gc2 = widget.window.new_gc(green)

widget.window.draw_rectangle(widget.get_style().white_gc,True,0,0,width,height)
  widget.window.draw_rectangle(gc,True,100,100,30,30)
  widget.window.draw_rectangle(gc2,True,30,30,30,30)

w = gtk.Window(gtk.WINDOW_TOPLEVEL)
canvas = gtk.DrawingArea()

w.resize(300,300)

w.add(canvas)
canvas.connect('expose_event',expose)

gtk.Widget.show_all(w)

gtk.main()*



I have invoked gtk.gdk.GC.set_foreground() to set the foreground color for
gc,but what I see is only two BLACK rectangles...
what should I do to solve this problem?

Any suggestion is appreciated.:)