WinAPI: BeginPath、EndPath、StrokePath、FillPath、StrokeAndFillPath

BeginPath         {路徑開始}EndPath           {路徑結束}StrokePath        {繪製路徑}FillPath          {填充路徑}StrokeAndFillPath {繪製並填充路徑}//在路徑中可以使用的圖形命令有:AngleArcArcArcToChordCloseFigureEllipseExtTextOutLineToMoveToExPiePolyBezierPolyBezierToPolyDrawPolygonPolylinePolylineToPolyPolygonPolyPolylineRectangleRoundRectTextOut

本例:

代碼檔案:

unit Unit1;interfaceuses  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,  Dialogs, StdCtrls, ExtCtrls;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}procedure TForm1.FormCreate(Sender: TObject);begin  RadioGroup1.Items.CommaText := '繪製路徑,填充路徑,繪製並填充';  RadioGroup1.ItemIndex := 0;  RadioGroup1.Columns := RadioGroup1.Items.Count;end;procedure TForm1.FormPaint(Sender: TObject);begin  Canvas.Font.Size := 36;  Canvas.Font.Style := [fsBold];  SetBkMode(Canvas.Handle, TRANSPARENT);  BeginPath(Canvas.Handle);  Canvas.Rectangle(10,10,110,110);  Canvas.TextOut(20,30,'Delphi 2007');  EndPath(Canvas.Handle);  Canvas.Brush.Color := clYellow;  Canvas.Pen.Color := clRed;  case RadioGroup1.ItemIndex of    0: StrokePath(Canvas.Handle);    1: FillPath(Canvas.Handle);    2: StrokeAndFillPath(Canvas.Handle);  end;end;procedure TForm1.RadioGroup1Click(Sender: TObject);begin  Repaint;end;end.

表單設計:

object Form1: TForm1  Left = 373  Top = 260  Caption = 'Form1'  ClientHeight = 193  ClientWidth = 321  Color = clBtnFace  Font.Charset = DEFAULT_CHARSET  Font.Color = clWindowText  Font.Height = -11  Font.Name = 'Tahoma'  Font.Style = []  OldCreateOrder = False  Position = poDesigned  OnCreate = FormCreate  OnPaint = FormPaint  PixelsPerInch = 96  TextHeight = 13  object RadioGroup1: TRadioGroup    Left = 28    Top = 131    Width = 265    Height = 49    Caption = 'RadioGroup1'    TabOrder = 0    OnClick = RadioGroup1Click  endend