学步园

本例效果图:

---

代码文件:

---

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  TForm1 = class(TForm)
    procedure FormPaint(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses GDIPOBJ, GDIPAPI;

procedure TForm1.FormPaint(Sender: TObject);
var
  g : TGPGraphics;
  path: TGPGraphicsPath;
  pb: TGPPathGradientBrush;
  rt: TGPRect;
const
  pts: array[0..2] of TGPPoint = ((X:90; Y:10), (X:10; Y:160), (X:160; Y:160));
  colors: array[0..2] of TGPColor = (aclGreen, aclAqua, aclBlue);
  pos: array[0..2] of Single = (0.0, 0.25, 1.0); {颜色位置需要 >=0、

窗体文件:

---

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 164
  ClientWidth = 491
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  Position = poDesktopCenter
  OnPaint = FormPaint
  PixelsPerInch = 96
  TextHeight = 13
end