def OnPaint(self):
if not self._win_paint_broken:
try:
win = self._win
dc, ps = win.BeginPaint()
try:
win_update_rect = ps[2]
if not empty_rect(win_update_rect):
#print "DrawableContainer.OnPaint: win_update_rect =", win_update_rect ###
scroll_offset = self._win_scroll_offset()
view_update_rect = offset_rect(win_update_rect, scroll_offset)
if self._double_buffer:
dx, dy = rect_topleft(view_update_rect)
width, height = rect_size(view_update_rect)
buffer = gdi.Bitmap(width, height)
canvas = Canvas._from_win_image(buffer)
canvas.translate(-dx, -dy)
self.draw(canvas, view_update_rect)
graphics = gdi.Graphics.from_dc(dc)
src_rect = (0, 0, width, height)
graphics.DrawImage_rr(buffer, win_update_rect, src_rect)
else:
self._win_prepare_dc(dc)
canvas = Canvas._from_win_dc(dc)
self.draw(canvas, view_update_rect)
finally:
win.EndPaint(ps)
except Exception:
self._win_paint_broken = True
raise
def with_canvas(self, proc):
proc(Canvas._from_win_image(self._win_image))