func (mw *MainWindow) drawStuff(surface *drawing.Surface, updateBounds drawing.Rectangle) os.Error {
bmp := createBitmap()
defer bmp.Dispose()
bounds, err := mw.paintWidget.ClientBounds()
panicIfErr(err)
rectPen, err := drawing.NewCosmeticPen(drawing.PenSolid, drawing.RGB(255, 0, 0))
panicIfErr(err)
defer rectPen.Dispose()
panicIfErr(surface.DrawRectangle(rectPen, bounds))
ellipseBrush, err := drawing.NewHatchBrush(drawing.RGB(0, 255, 0), drawing.HatchCross)
panicIfErr(err)
defer ellipseBrush.Dispose()
panicIfErr(surface.FillEllipse(ellipseBrush, bounds))
linesBrush, err := drawing.NewSolidColorBrush(drawing.RGB(0, 0, 255))
panicIfErr(err)
defer linesBrush.Dispose()
linesPen, err := drawing.NewGeometricPen(drawing.PenDash, 8, linesBrush)
panicIfErr(err)
defer linesPen.Dispose()
panicIfErr(surface.DrawLine(linesPen, drawing.Point{bounds.X, bounds.Y}, drawing.Point{bounds.Width, bounds.Height}))
panicIfErr(surface.DrawLine(linesPen, drawing.Point{bounds.X, bounds.Height}, drawing.Point{bounds.Width, bounds.Y}))
bmpSize := bmp.Size()
panicIfErr(surface.DrawImage(bmp, drawing.Point{bounds.Width/2 - bmpSize.Width/2, bounds.Height/2 - bmpSize.Height/2}))
return nil
}
