Delphi控件源码

开发平台：

Delphi

ubgradient.pas：源码内容

							unit ubgradient;
interface
uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ExtCtrls, ComCtrls, VrTypes, VrClasses, VrControls, VrSysUtils,
  VrGradient, VrHyperLink, VrBlotter, VrLcd;
type
  TForm1 = class(TForm)
    VrGradient1: TVrGradient;
    ColorDialog1: TColorDialog;
    VrBlotter1: TVrBlotter;
    VrHyperLink1: TVrHyperLink;
    VrHyperLink2: TVrHyperLink;
    VrHyperLink3: TVrHyperLink;
    VrNum1: TVrNum;
    VrHyperLink4: TVrHyperLink;
    UpDown2: TUpDown;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure VrHyperLink3Click(Sender: TObject);
    procedure UpDown2Click(Sender: TObject; Button: TUDBtnType);
  private
    procedure WMEraseBkgnd(var Message: TWMEraseBkgnd); message WM_ERASEBKGND;
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.FormCreate(Sender: TObject);
begin
  Caption := Application.Title;
end;
procedure TForm1.WMEraseBkgnd(var Message: TWMEraseBkgnd);
begin
  Message.Result := 1;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
  ColorDialog1.Color := VrGradient1.StartColor;
  if ColorDialog1.Execute then
    VrGradient1.StartColor := ColorDialog1.Color;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
  ColorDialog1.Color := VrGradient1.EndColor;
  if ColorDialog1.Execute then
    VrGradient1.EndColor := ColorDialog1.Color;
end;
procedure TForm1.VrHyperLink3Click(Sender: TObject);
begin
  if VrGradient1.Direction = High(TVrGradDirection) then
   VrGradient1.Direction := Low(TVrGradDirection)
  else VrGradient1.Direction := TVrGradDirection(ord(VrGradient1.Direction)+1);
end;
procedure TForm1.UpDown2Click(Sender: TObject; Button: TUDBtnType);
begin
  VrNum1.Value := UpDown2.Position;
  VrGradient1.ColorWidth := VrNum1.Value;
end;
end.

						