在Delphi 7下要制作系统托盘，只能制作一个比较简单的系统托盘，因为ShellAPI文件定义的TNotifyIconData结构体是比较早的版本。定义如下：
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_NOTIFYICONDATAA = record cbSize: DWORD; Wnd: HWND; uID: UINT; uFlags: UINT; uCallbackMessage: UINT; hIcon: HICON; szTip: array [0..63] of AnsiChar; end; |
下面开始实现下最小化到系统托盘功能：
1.新建应用程序，然后在“菜单栏”→“Project”→“Options”→”Application“为程序设定下标题和图标，一定得设置图标，不让显示系统托盘的时候就会空白；
2.在窗体上放置一个右键菜单，添加两个菜单项，如下图所示：
3.窗体单元文件代码如下：
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unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ShellAPI, Menus; const WM_TRAYMSG = WM_USER + 101; //自定义托盘消息 type TForm1 = class(TForm) pm1: TPopupMenu; mniN1: TMenuItem; mniwo1: TMenuItem; procedure FormCreate(Sender: TObject); procedure FormDestroy(Sender: TObject); procedure mniN1Click(Sender: TObject); private procedure WMTrayMsg(var Msg: TMessage);message WM_TRAYMSG; //声明托盘消息 procedure WMSysCommand(var Msg: TMessage);message WM_SYSCOMMAND; public { Public declarations } end; var Form1: TForm1; NotifyIcon: TNotifyIconData; //定义托盘图标结构体 implementation {$R *.dfm} {------------------------------------------------------------------------------- Description: 窗体创建时，即创建托盘 -------------------------------------------------------------------------------} procedure TForm1.FormCreate(Sender: TObject); begin with NotifyIcon do begin cbSize := SizeOf(TNotifyIconData); Wnd := Self.Handle; uID := 1; uFlags := NIF_ICON + NIF_MESSAGE + NIF_TIP; //图标、消息、提示信息 uCallbackMessage := WM_TRAYMSG; hIcon := Application.Icon.Handle; szTip := '托盘测试'; end; Shell_NotifyIcon(NIM_ADD,@NotifyIcon); end; {------------------------------------------------------------------------------- Description: 窗体销毁时，卸载托盘 -------------------------------------------------------------------------------} procedure TForm1.FormDestroy(Sender: TObject); begin Shell_NotifyIcon(NIM_DELETE,@NotifyIcon); end; {------------------------------------------------------------------------------- Description: 截获窗体最小化消息，最小化到托盘 -------------------------------------------------------------------------------} procedure TForm1.WMSysCommand(var Msg: TMessage); begin if Msg.WParam = SC_ICON then Self.Visible := False else DefWindowProc(Self.Handle,Msg.Msg,Msg.WParam,Msg.LParam); end; {------------------------------------------------------------------------------- Description: 自定义的托盘消息 -------------------------------------------------------------------------------} procedure TForm1.WMTrayMsg(var Msg: TMessage); var p: TPoint; begin case Msg.LParam of WM_LBUTTONDOWN: Self.Visible := True; //显示窗体 WM_RBUTTONDOWN: begin SetForegroundWindow(Self.Handle); //把窗口提前 GetCursorPos(p); pm1.Popup(p.X,p.Y); end; end; end; {------------------------------------------------------------------------------- Description: 测试菜单项 -------------------------------------------------------------------------------} procedure TForm1.mniN1Click(Sender: TObject); begin ShowMessage('One'); end; end. |
4.运行结果如下：
参考MSDN（http://msdn.microsoft.com/en-us/library/bb773352(VS.85).aspx）对NOTIFYICONDATA结构体的介绍却是：
| typedef struct _NOTIFYICONDATA { DWORD cbSize; //结构体的大小，以字节为单位 HWND hWnd; //窗口的句柄 UINT uID; //应用程序定义的任务栏图标的标识符 UINT uFlags; //此成员表明具体哪些其他成员为合法数据 UINT uCallbackMessage; //应用程序定义的消息标示 HICON hIcon; //增加、修改或删除的图标的句柄 TCHAR szTip[64]; //指向一个以/0结束的字符串的指针 DWORD dwState; //Version 5.0，图标的状态 DWORD dwStateMask; //Version 5.0. 指明dwState成员的那些位可以被设置或者访问 TCHAR szInfo[256]; //指向一个以/0结束的字符串的指针,字符串的内容为气球提示内容 union { UINT uTimeout; //表示气球提示超时的时间，单位为毫秒，此时间后气球提示将消失 UINT uVersion; //用来设置使用Windows 95 还是 Windows 2000风格的图标消息接口 }; TCHAR szInfoTitle[64]; //指向一个以/0结束的字符串的指针。字符串的内容为气球提示的标题 DWORD dwInfoFlags; //设置此成员用来给气球提示框增加一个图标,增加的图标出现在气球提示标题的左侧 GUID guidItem; //保留 HICON hBalloonIcon; //用于Windows Vista或更高版本的自定义气球图标 } NOTIFYICONDATA, *PNOTIFYICONDATA; |
那么为了在Windows XP下也有气泡提示，那么我们手动添加几个类型，大概代码如下：
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unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ShellAPI, Menus; //---------------------开始：Delphi 7下添加此声明------------------------------- const NIF_INFO = $00000010; //气泡显示标志 NIIF_NONE = $00000000; //无图标 NIIF_INFO = $00000001; //信息图标 NIIF_WARNING = $00000002; //警告图标 NIIF_ERROR = $00000003; //错误图标 NIIF_USER = $00000004; //XP使用hIcon图标 type TNotifyIconDataEx = record cbSize: DWORD; Wnd: HWND; uID: UINT; uFlags: UINT; uCallbackMessage: UINT; hIcon: HICON; szTip: array [0..127] of AnsiChar; dwState: DWORD; dwStateMask: DWORD; szInfo: array [0..255] of AnsiChar; case Integer of 0: ( uTimeout: UINT); 1: (uVersion: UINT; szInfoTitle: array [0..63] of AnsiChar; dwInfoFlags: DWORD); end; //---------------------开始：Delphi 7下添加此声明------------------------------- const WM_TRAYMSG = WM_USER + 101; //自定义托盘消息 type TForm1 = class(TForm) pm1: TPopupMenu; mniN1: TMenuItem; mniwo1: TMenuItem; procedure FormCreate(Sender: TObject); procedure FormDestroy(Sender: TObject); procedure mniN1Click(Sender: TObject); private procedure WMTrayMsg(var Msg: TMessage);message WM_TRAYMSG; //声明托盘消息 procedure WMSysCommand(var Msg: TMessage);message WM_SYSCOMMAND; public { Public declarations } end; var Form1: TForm1; NotifyIcon: TNotifyIconDataEx; //定义托盘图标结构体 implementation {$R *.dfm} {------------------------------------------------------------------------------- Description: 窗体创建时，即创建托盘 -------------------------------------------------------------------------------} procedure TForm1.FormCreate(Sender: TObject); begin with NotifyIcon do begin cbSize := SizeOf(TNotifyIconDataEx); Wnd := Self.Handle; uID := 1; uFlags := NIF_ICON + NIF_MESSAGE + NIF_TIP + NIF_INFO; //图标、消息、提示信息 uCallbackMessage := WM_TRAYMSG; hIcon := Application.Icon.Handle; szTip := '托盘测试'; szInfo := '提示内容'; szInfoTitle := '气泡标题'; dwInfoFlags := NIIF_USER; end; Shell_NotifyIcon(NIM_ADD,@NotifyIcon); end; {------------------------------------------------------------------------------- ……以下代码与上面例子一样 -------------------------------------------------------------------------------} |
运行结果如下：
