procedure TForm1.Button1Click(Sender: TObject); begin with PaintBox1 do begin Canvas.MoveTo(0,0); Canvas.LineTo(Width, Height); end; end;procedure TForm1.Button2Click(Sender: TObject); var R : TRect; begin R := PaintBox1.BoundsRect; R.Top := R.Top + PaintBox1.Height div 2; InvalidateRect(Handle,@R,True); end;
begin
with PaintBox1 do
begin
Canvas.MoveTo(0,0);
Canvas.LineTo(Width, Height);
end;
end;procedure TForm1.Button2Click(Sender: TObject);
var
R : TRect;
begin
R := PaintBox1.BoundsRect;
R.Top := R.Top + PaintBox1.Height div 2;
InvalidateRect(Handle,@R,True);
end;
上面的是一个,下面的是一个,在ONPaint事件里加载这二个图片;
你可以分开控制每个BitMap的图象,