本例效果圖:
代碼文件:unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls, CheckLst;
type
TForm1 = class(TForm)
RadioGroup1: TRadioGroup;
procedure FormCreate(Sender: TObject);
procedure FormPaint(Sender: TObject);
procedure RadioGroup1Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ,GDIPAPI;
procedure TForm1.FormCreate(Sender: TObject);
begin
RadioGroup1.Caption := '選擇畫刷';
RadioGroup1.Items.CommaText := '實心畫刷,陰影畫刷,紋理畫刷,漸變畫刷';
RadioGroup1.ItemIndex := 0;
end;
procedure TForm1.FormPaint(Sender: TObject);
var
g: TGPGraphics;
font: TGPFont;
img: TGPImage;
b: TGPBrush;
begin
g := TGPGraphics.Create(Canvas.Handle);
img := TGPImage.Create('c:\temp\small.jpg'); {文件要存在}
case RadioGroup1.ItemIndex of
0: b := TGPSolidBrush.Create(aclRed);
1: b := TGPHatchBrush.Create(HatchStyleCross, aclSilver, aclRed);
2: b := TGPTextureBrush.Create(img);
3: b := TGPLinearGradientBrush.Create(
MakePoint(0,0),
MakePoint(ClientWidth - RadioGroup1.Width, ClientHeight),
aclYellow,
aclRed
);
end;
font := TGPFont.Create('Arial Black', 60, FontStyleBold);
g.DrawString('Delphi', -1, font, MakePoint(0.0,0), b);
img.Free;
b.Free;
font.Free;
g.Free;
end;
procedure TForm1.RadioGroup1Click(Sender: TObject);
begin
Repaint;
end;
end.
