在 StringGrid 上画线时, 使用 GDI+ 以消除锯齿 - 回复 "gsjn_8888_6666" 的问题

问题来源: http://www.cnblogs.com/del/archive/2009/12/24/1631729.html#2097194

GDI+ 接口: http://www.cnblogs.com/del/archive/2009/12/11/1621790.html

示例代码:

uses GdiPlus;

procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer; Rect: TRect;
  State: TGridDrawState);
var
  Graphics: IGPGraphics;
  Pen: IGPPen;
begin
  //获取绘图表面
  Graphics := TGPGraphics.Create(TWinControl(Sender).Handle);
  //设置绘图质量以消除锯齿
  Graphics.SmoothingMode := SmoothingModeHighQuality;
  //画笔
  Pen := TGPPen.Create(TGPColor.Red, 1);
  //随便画了两条线
  Graphics.DrawLine(Pen, Rect.Left, Rect.Top, Rect.Right, Rect.Bottom);
  Graphics.DrawLine(Pen, Rect.Right, Rect.Top, Rect.Left, Rect.Bottom);
end;