本例效果图:
代码文件:unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ComCtrls, StdCtrls, ExtCtrls;
type
TForm1 = class(TForm)
Panel1: TPanel;
Button1: TButton;
TrackBar1: TTrackBar;
TrackBar2: TTrackBar;
TrackBar3: TTrackBar;
TrackBar4: TTrackBar;
TrackBar5: TTrackBar;
TrackBar6: TTrackBar;
PaintBox1: TPaintBox;
procedure FormCreate(Sender: TObject);
procedure TrackBar1Change(Sender: TObject);
procedure TrackBar2Change(Sender: TObject);
procedure TrackBar3Change(Sender: TObject);
procedure TrackBar4Change(Sender: TObject);
procedure TrackBar5Change(Sender: TObject);
procedure TrackBar6Change(Sender: TObject);
procedure PaintBox1Paint(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ, GDIPAPI;
procedure TForm1.FormCreate(Sender: TObject);
const
n = 40;
begin
TrackBar1.Min := -n;
TrackBar1.Max := n;
TrackBar2.Min := -n;
TrackBar2.Max := n;
TrackBar3.Min := -n;
TrackBar3.Max := n;
TrackBar4.Min := -n;
TrackBar4.Max := n;
TrackBar5.Min := -n;
TrackBar5.Max := n;
TrackBar6.Min := -n;
TrackBar6.Max := n;
TrackBar1.Position := 10;
TrackBar2.Position := 0;
TrackBar3.Position := 0;
TrackBar4.Position := 10;
TrackBar5.Position := 0;
TrackBar6.Position := 0;
Button1.OnClick := FormCreate;
end;
procedure TForm1.PaintBox1Paint(Sender: TObject);
var
g: TGPGraphics;
p: TGPPen;
b: TGPBrush;
path: TGPGraphicsPath;
matrix: TGPMatrix;
fontFamily: TGPFontFamily;
StringFormat: TGPStringFormat;
rect: TGPRect;
begin
rect := MakeRect(20, 20, 180, 120);
g := TGPGraphics.Create(PaintBox1.Canvas.Handle);
p := TGPPen.Create(aclYellowGreen, 1);
b := TGPHatchBrush.Create(HatchStyleSmallGrid, aclSilver, aclYellowGreen);
fontFamily := TGPFontFamily.Create('Arial Black');
StringFormat := TGPStringFormat.Create;
StringFormat.SetAlignment(StringAlignmentCenter);
StringFormat.SetLineAlignment(StringAlignmentCenter);
path := TGPGraphicsPath.Create;
path.AddRectangle(rect);
path.AddEllipse(rect);
path.AddString('ABC', -1, fontFamily, FontStyleRegular, 60, rect, StringFormat);
matrix := TGPMatrix.Create;
matrix.SetElements(TrackBar1.Position / 10,
TrackBar2.Position / 10,
TrackBar3.Position / 10,
TrackBar4.Position / 10,
TrackBar5.Position * 10,
TrackBar6.Position * 10);
path.Transform(matrix);
g.FillPath(b, path);
g.DrawPath(p, path);
path.Free;
StringFormat.Free;
fontFamily.Free;
b.Free;
p.Free;
g.Free;
end;
procedure TForm1.TrackBar1Change(Sender: TObject);
begin
PaintBox1.Repaint;
end;
procedure TForm1.TrackBar2Change(Sender: TObject);
begin
PaintBox1.Repaint;
end;
procedure TForm1.TrackBar3Change(Sender: TObject);
begin
PaintBox1.Repaint;
end;
procedure TForm1.TrackBar4Change(Sender: TObject);
begin
PaintBox1.Repaint;
end;
procedure TForm1.TrackBar5Change(Sender: TObject);
begin
PaintBox1.Repaint;
end;
procedure TForm1.TrackBar6Change(Sender: TObject);
begin
PaintBox1.Repaint;
end;
end.