将最小化图标放入系统托盘的Windows API 在Delphi中的声明(50分)

Eliot · 2000-03-18

本人近日看杂志，突然想到此问题，还望各位大虾赐教！

gxg8816 · 2000-03-18

function Shell_NotifyIcon; external shell32 name 'Shell_NotifyIconA'; 在大富翁中搜索'托盘图标'或 'NotifyIcon',答案太多了.

wonday · 2000-03-18

看看这个控件的源码 { TTrayIcon VCL. Version 1.3   Requires:  Delphi 2.0 32 bit.   Function: Adds an icon to the Windows 95 Tool Tray and       has events to respond to mouse clicks.   This component is based on the TToolIcon VCL that was written by   Derek Stutsman (dereks@metronet.com).  He based his component on   TWinControl, so it showed up as a clear, blank, resizable window at   design time and also had more properties than the component actually   needed.  This made it really hard to find on a busy form sometimes.   I changed it so it would be based on TComponent so that it was readily   visible at design time and also did not cover anything at run-time.   The additional Top, left, width, etc. properties are also no longer   necessary.  I added a ShowDesigning property so that you could test   it at design time, but then turn it off so that TWO icons weren't shown   on the tool tray when developing and testing.   One strange anomaly that I worked around but don't know why it happens -   if a ToolTip is not specified, then at run-time the icon shows up as   blank.  If a ToolTip is specified, everything works fine.  To fix this,   I set up another windows message that set the tool tip if it was blank -   this ensures proper operation at all times, but I don't know why this   is necessary.  If you can figure it out, send me some mail and let me   know! (4/17/96 note - still no solution for this!)   This is freeware (as was the original).  If you make cool changes to it,   please send them to me.   Enjoy!   Pete Ness   Compuserve ID: 102347,710   Internet: 102347.710@compuserve.com   http://ourworld.compuserve.com/homepages/peteness   Release history:   3/8/96 - Version 1.0      Release by Derek Stutsman of TToolIcon version 1.0   3/12/96 - Version 1.1      Changed as outlined above by me (Pete Ness) and renamed to TTrayIcon.   3/29/96 - Version 1.2      Add default window handling to allow closing when Win95 shutdown.      Previously, you had to manually close your application before closing      Windows 95.   4/17/96 - Version 1.3      Added a PopupMenu property to automatically handle right clicking on      the tray icon.      Fixed bug that would not allow you to instantiate a TTrayIcon instance      at run-time.      Added an example program to show how to do some of the things I've      gotten the most questions on.      This version is available from my super lame web page - see above for      the address.   } unit TrayIcon; interface uses   SysUtils, Windows, Messages, Classes, Graphics, Controls, ShellAPI, Forms, menus; const WM_TOOLTRAYICON = WM_USER+1;       WM_RESETTOOLTIP = WM_USER+2; type   TTrayIcon = class(TComponent)   private   { Field Variables }     IconData: TNOTIFYICONDATA;     fIcon : TIcon;     fToolTip : String;     fWindowHandle : HWND;     fActive : boolean;     fShowDesigning : Boolean;   { Events }     fOnClick     : TNotifyEvent;     fOnDblClick  : TNotifyEvent;     fOnRightClick : TMouseEvent;     fPopupMenu   : TPopupMenu;     function AddIcon : boolean;     function ModifyIcon : boolean;     function DeleteIcon : boolean;     procedure SetActive(Value : boolean);     procedure SetShowDesigning(Value : boolean);     procedure SetIcon(Value : TIcon);     procedure SetToolTip(Value : String);     procedure WndProc(var msg : TMessage);     procedure FillDataStructure;     procedure DoRightClick( Sender : TObject );       protected   public     constructor create(aOwner : TComponent); override;     destructor destroy; override;   published     property Active : boolean read fActive write SetActive;     property ShowDesigning : boolean read fShowDesigning write SetShowDesigning;     property Icon : TIcon read fIcon write SetIcon;     property ToolTip : string read fTooltip write SetToolTip;     property OnClick     : TNotifyEvent read FOnClick write FOnClick;     property OnDblClick  : TNotifyEvent read FOnDblClick write FOnDblClick;     property OnRightClick : TMouseEvent  read FOnRightClick write FonRightClick;     property PopupMenu : TPopupMenu read fPopupMenu write fPopupMenu;   end; procedure Register; implementation {$R TrayIcon.res} procedure TTrayIcon.SetActive(Value : boolean); begin    if value <> fActive then begin      fActive := Value;      if not (csdesigning in ComponentState) then begin         if Value then begin            AddIcon;         end else begin            DeleteIcon;         end;      end;   end; end; procedure TTrayIcon.SetShowDesigning(Value : boolean); begin   if csdesigning in ComponentState then begin      if value <> fShowDesigning then begin         fShowDesigning := Value;         if Value then begin            AddIcon;         end else begin            DeleteIcon;         end;      end;   end; end; procedure TTrayIcon.SetIcon(Value : Ticon); begin   if Value <> fIcon then     begin       fIcon.Assign(value);       ModifyIcon;     end; end; procedure TTrayIcon.SetToolTip(Value : string); begin    // This routine ALWAYS re-sets the field value and re-loads the    // icon.  This is so the ToolTip can be set blank when the component    // is first loaded.  If this is changed, the icon will be blank on    // the tray when no ToolTip is specified.    if length( Value ) > 62 then       Value := copy(Value,1,62);    fToolTip := value;    ModifyIcon; end; constructor TTrayIcon.create(aOwner : Tcomponent); begin   inherited create(aOwner);   FWindowHandle := AllocateHWnd( WndProc );   FIcon := TIcon.Create; end; destructor TTrayIcon.destroy; begin   if (not (csDesigning in ComponentState) and fActive)      or ((csDesigning in ComponentState) and fShowDesigning) then         DeleteIcon;   FIcon.Free;   DeAllocateHWnd( FWindowHandle );   inherited destroy; end; procedure TTrayIcon.FillDataStructure; begin   with IconData do begin      cbSize := sizeof(TNOTIFYICONDATA);      wnd := FWindowHandle;      uID := 0; // is not passed in with message so make it 0      uFlags := NIF_MESSAGE + NIF_ICON + NIF_TIP;      hIcon := fIcon.Handle;      StrPCopy(szTip,fToolTip);      uCallbackMessage := WM_TOOLTRAYICON;   end; end; function TTrayIcon.AddIcon : boolean; begin    FillDataStructure;    result := Shell_NotifyIcon(NIM_ADD,@IconData);    // For some reason, if there is no tool tip set up, then the icon    // doesn't display.  This fixes that.    if fToolTip = '' then       PostMessage( fWindowHandle, WM_RESETTOOLTIP,0,0 ); end; function TTrayIcon.ModifyIcon : boolean; begin    FillDataStructure;    if fActive then       result := Shell_NotifyIcon(NIM_MODIFY,@IconData)    else       result := True; end; procedure TTrayIcon.DoRightClick( Sender : TObject ); var MouseCo: Tpoint; begin    GetCursorPos(MouseCo);    if assigned( fPopupMenu ) then begin       SetForegroundWindow( Application.Handle );       Application.ProcessMessages;       fPopupmenu.Popup( Mouseco.X, Mouseco.Y );    end;    if assigned( FOnRightClick ) then       begin          FOnRightClick(self,mbRight,[],MouseCo.x,MouseCo.y);       end; end; function TTrayIcon.DeleteIcon : boolean; begin    result := Shell_NotifyIcon(NIM_DELETE,@IconData); end; procedure TTrayIcon.WndProc(var msg : TMessage); begin    with msg do      if (msg = WM_RESETTOOLTIP) then         SetToolTip( fToolTip )      else if (msg = WM_TOOLTRAYICON) then begin         case lParam of            WM_LBUTTONDBLCLK   : if assigned (FOnDblClick) then FOnDblClick(self);            WM_LBUTTONUP       : if assigned(FOnClick)then FOnClick(self);            WM_RBUTTONUP       : DoRightClick(self);         end;      end      else // Handle all messages with the default handler         Result := DefWindowProc(FWindowHandle, Msg, wParam, lParam); end; procedure Register; begin   RegisterComponents('Win95', [TTrayIcon]); end; end.

Eliot · 2000-03-18

Thank you all very much!

Pipi. · 2000-03-18

声明在 shellapi uses shellapi  就可以了。

Eliot · 2000-03-28

很长时间没来了，前几日试了一下TTrayIcon，可能不符合我的要求，它 不能去掉任务栏的图标，不过还是很有意思的。

将最小化图标放入系统托盘的Windows API 在Delphi中的声明(50分)

Eliot

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gxg8816

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wonday

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Eliot

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Pipi.

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Eliot

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