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一个简单的菜单按钮的实现 (转)

原创 IT综合 作者:worldblog 时间:2007-12-11 13:55:40 0 删除 编辑
一个简单的菜单按钮的实现 (转)[@more@]

  使用过速达2000的朋友都知道,其基本资料的浏览界面中有一种按钮,点击后会弹出一个和按钮对得很整齐的菜单.用Delphi制作一个类似的控件十分容易,代码如下:

unit MenuBtnVCL;

interface

uses
  windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  Buttons, CommCtrl,
  ExtCtrls,Menus;

type
  TMenuBtn = class(TBitBtn)
  protected
  procedure DoEnter;override;
  procedure DoExit;override;
  { Protected declarations }
  public
  constructor Create(AOwner: TComponent); override;
  procedure Click; override;
  { Public declarations }
  published
  { AL: }
  { Published declarations }
  end;

procedure Register;

implementation

procedure Register;
begin
  RegisterComponents('Samples', [TMenuBtn]);
end;


constructor TMenuBtn.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  layout:=blGlyphRight;
  Font.Charset := GB2312_CHARSET;
  Font.Color := clWindowText;
  Font.Height := -12;
  Font.Name := '宋体';
end;

procedure TMenuBtn.Click;
var tmp:TPoint;
begin
  inherited Click;

  if Assigned(PopUpMenu) then
  begin
  { calc where to put menu }
  tmp := ClientToScreen(Point(0, Height));
  PopUpMenu.Popup(tmp.X, tmp.Y);
  end;
end;

procedure TMenuBtn.DoEnter;
begin
  Font.Style := [fsBold];
  inherited DoEnter;
end;

procedure TMenuBtn.DoExit ;
begin
  Font.Style := [];
  inherited DoExit;
end;

end.

 


来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/10752043/viewspace-991429/,如需转载,请注明出处,否则将追究法律责任。

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