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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 再學 GDI+[21]: TGPTextureBrush 與 TGPMatrix

再學 GDI+[21]: TGPTextureBrush 與 TGPMatrix

編輯:Delphi

本例效果圖:

再學 GDI+[21]: TGPTextureBrush 與 TGPMatrix

  代碼文件: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;
  procedure FormCreate(Sender: TObject);
  procedure FormPaint(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);
 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.FormPaint(Sender: TObject);
var
 g: TGPGraphics;
 img: TGPImage;
 tb: TGPTextureBrush;
 matrix: TGPMatrix;
 m11, m12, m21, m22, dx, dy: Single;
begin
 g := TGPGraphics.Create(Canvas.Handle);
 img := TGPImage.Create('c:tempsmall.png');
 tb := TGPTextureBrush.Create(img);
 m11 := TrackBar1.Position / 10;
 m12 := TrackBar2.Position / 10;
 m21 := TrackBar3.Position / 10;
 m22 := TrackBar4.Position / 10;
 dx := TrackBar5.Position * 10;
 dy := TrackBar6.Position * 10;
 matrix := TGPMatrix.Create(m11, m12, m21, m22, dx, dy);
 tb.SetTransform(matrix);
 g.FillRectangle(tb, 0, 0, ClientWidth - Panel1.Width, ClIEntHeight);
 matrix.Free;
 img.Free;
 tb.Free;
 g.Free;
end;
procedure TForm1.TrackBar1Change(Sender: TObject);
begin
 Repaint;
end;
procedure TForm1.TrackBar2Change(Sender: TObject);
begin
 Repaint;
end;
procedure TForm1.TrackBar3Change(Sender: TObject);
begin
 Repaint;
end;
procedure TForm1.TrackBar4Change(Sender: TObject);
begin
 Repaint;
end;
procedure TForm1.TrackBar5Change(Sender: TObject);
begin
 Repaint;
end;
procedure TForm1.TrackBar6Change(Sender: TObject);
begin
 Repaint;
end;
end.
窗體文件:object Form1: TForm1
 Left = 0
 Top = 0
 Caption = 'Form1'
 ClIEntHeight = 170
 ClIEntWidth = 324
 Color = clBtnFace
 Font.Charset = DEFAULT_CHARSET
 Font.Color = clWindowText
 Font.Height = -11
 Font.Name = 'Tahoma'
 Font.Style = []
 OldCreateOrder = False
 Position = poDesktopCenter
 OnCreate = FormCreate
 OnPaint = FormPaint
 PixelsPerInch = 96
 TextHeight = 13
 object Panel1: TPanel
  Left = 225
  Top = 0
  Width = 99
  Height = 170
  Align = alRight
  TabOrder = 0
  ExplicitLeft = 288
  ExplicitHeight = 213
  object Button1: TButton
   Left = 14
   Top = 8
   Width = 75
   Height = 25
   Caption = #21021#22987#21270
   TabOrder = 0
  end
  object TrackBar1: TTrackBar
   Left = 0
   Top = 34
   Width = 100
   Height = 20
   ShowSelRange = False
   TabOrder = 1
   OnChange = TrackBar1Change
  end
  object TrackBar2: TTrackBar
   Left = 0
   Top = 56
   Width = 100
   Height = 20
   ShowSelRange = False
   TabOrder = 2
   OnChange = TrackBar2Change
  end
  object TrackBar3: TTrackBar
   Left = 0
   Top = 78
   Width = 100
   Height = 20
   ShowSelRange = False
   TabOrder = 3
   OnChange = TrackBar3Change
  end
  object TrackBar4: TTrackBar
   Left = 0
   Top = 100
   Width = 100
   Height = 20
   ShowSelRange = False
   TabOrder = 4
   OnChange = TrackBar4Change
  end
  object TrackBar5: TTrackBar
   Left = 0
   Top = 122
   Width = 100
   Height = 20
   ShowSelRange = False
   TabOrder = 5
   OnChange = TrackBar5Change
  end
  object TrackBar6: TTrackBar
   Left = 0
   Top = 144
   Width = 100
   Height = 20
   ShowSelRange = False
   TabOrder = 6
   OnChange = TrackBar6Change
  end
 end
end


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