通知图标接收WM_LBUTTONDBLCLK但不接收WM_CONTEXTMENU

时间:2011-12-06 17:54:24

标签: c++ visual-c++-2010 winapi

我在基于对话框的应用程序中添加了一个通知图标,当双击该图标时它收到了WM_LBUTTONDBLCLK,但是当右键单击图标或者用键盘和上下文突出显示图标时,它没有收到WM_CONTEXTMENU菜单键被按下。我根据Windows 7.1 SDK示例中的示例使用了通知图标。所以,我不知道我哪里出错了,或者为什么这不起作用。

注意:如果我将WM_CONTEXTMENU更改为WM_RBUTTONUP,它会收到事件,但光标坐标是错误的。

/******************************************************************************/
/* Menu Resource                                                              */
/******************************************************************************/
LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDR_TRAYMENU MENU
{
    POPUP ""
    {
        MENUITEM "&Show Status Window", IDM__SHOW_STATUS_WINDOW
        MENUITEM "&About", IDM__ABOUT
        MENUITEM SEPARATOR
        MENUITEM "&Exit", IDM__EXIT
    }
}

/******************************************************************************/
/* WinMain()                                                                  */
/******************************************************************************/
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{

    // ... code unrelated to icon

    // Enable Visual Styles
    InitCommonControls();

    // create the main dialog
    if( NULL == (hWnd=CreateDialog(hInstance,MAKEINTRESOURCE(IDD_MAINDLG),NULL,(DLGPROC)WndProc)) )
    {
        MessageBox( NULL, "Error creating the main dialog!", NULL, MB_OK | MB_ICONERROR );
        return -1;
    }

    // ... code unrelated to icon

    MSG msg;
    while( GetMessage(&msg,NULL,0,0) && IsWindow(hWnd) )
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0; 

}    
/******************************************************************************/
/* WndProc()                                                                  */
/******************************************************************************/
BOOL CALLBACK WndProc(HWND hWndDlg, UINT Message, WPARAM wParam, LPARAM lParam)
{

    switch(Message)
    {
        case WM_INITDIALOG:
        {

            // ... code unrelated to icon
            hIcon = (HICON)LoadImage( GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_DDCMP), IMAGE_ICON, 16, 16, LR_DEFAULTSIZE );

            // Setup the system tray icon
            memset( &nid, 0, sizeof(NOTIFYICONDATA) );
            nid.cbSize = sizeof(NOTIFYICONDATA);
            nid.hWnd = hWndDlg;
            nid.uID = 0xDDC;
            nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP | NIF_SHOWTIP;
            nid.uCallbackMessage = WM_APP + 0xDDC;
            nid.hIcon = hIcon;
            strcpy( nid.szTip, "DDCMP Driver" );
            Shell_NotifyIcon( NIM_ADD, &nid );

            // ... code unrelated to icon

            return true;
        } break;

        case WM_APP + 0xDDC:
        {
            switch( LOWORD(lParam) )
            {
                case WM_CONTEXTMENU:
                {
                    MessageBox( hWndDlg, "This message box never shows up.", NULL, MB_OK | MB_SYSTEMMODAL );
                    HMENU hMenu = LoadMenu(GetModuleHandle(NULL),MAKEINTRESOURCE(IDR_TRAYMENU));
                    if( hMenu )
                    {
                        HMENU hSubMenu = GetSubMenu(hMenu,0);
                        if( hSubMenu )
                        {
                            SetForegroundWindow( hWndDlg );
                            POINT pt = { LOWORD(wParam), HIWORD(wParam) };
                            UINT uFlags = TPM_RIGHTBUTTON;
                            if( 0 != GetSystemMetrics(SM_MENUDROPALIGNMENT) )
                                uFlags |= TPM_RIGHTALIGN;
                            else
                                uFlags |= TPM_LEFTALIGN;
                            TrackPopupMenuEx( hSubMenu, uFlags, pt.x, pt.y, hWndDlg, NULL );

                        }
                        DestroyMenu( hMenu );
                    }
                } break;
                case WM_LBUTTONDBLCLK:
                    if( IsWindowVisible(hWndDlg) )
                        ShowWindow( hWnd, SW_HIDE );
                    else
                        ShowWindow( hWnd, SW_SHOW );
                    break;
            }
            return true;
        } break;

        case WM_CLOSE:
            ShowWindow( hWndDlg, SW_HIDE );
            break;

        case WM_DESTROY:
        case WM_QUIT:
        {
            Shell_NotifyIcon( NIM_DELETE, &nid );

            // ... code unrelated to icon

            return true;
        } break;
    }

    return false;
}

这是Windows 7.1 SDK示例中的WndProc

    LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static HWND s_hwndFlyout = NULL;
    static BOOL s_fCanShowFlyout = TRUE;

    switch (message)
    {
    case WM_CREATE:
        // add the notification icon
        if (!AddNotificationIcon(hwnd))
        {
            MessageBox(hwnd,
                L"Please read the ReadMe.txt file for troubleshooting",
                L"Error adding icon", MB_OK);
            return -1;
        }
        break;
    case WM_COMMAND:
        {
            int const wmId = LOWORD(wParam);
            // Parse the menu selections:
            switch (wmId)
            {
            case IDM_LOWINK:
                ShowLowInkBalloon();
                break;

            case IDM_NOINK:
                ShowNoInkBalloon();
                break;

            case IDM_PRINTJOB:
                ShowPrintJobBalloon();
                break;

            case IDM_OPTIONS:
                // placeholder for an options dialog
                MessageBox(hwnd,  L"Display the options dialog here.", L"Options", MB_OK);
                break;

            case IDM_EXIT:
                DestroyWindow(hwnd);
                break;

            case IDM_FLYOUT:
                s_hwndFlyout = ShowFlyout(hwnd);
                break;

            default:
                return DefWindowProc(hwnd, message, wParam, lParam);
            }
        }
        break;

    case WMAPP_NOTIFYCALLBACK:
        switch (LOWORD(lParam))
        {
        case NIN_SELECT:
            // for NOTIFYICON_VERSION_4 clients, NIN_SELECT is prerable to listening to mouse clicks and key presses
            // directly.
            if (IsWindowVisible(s_hwndFlyout))
            {
                HideFlyout(hwnd, s_hwndFlyout);
                s_hwndFlyout = NULL;
                s_fCanShowFlyout = FALSE;
            }
            else if (s_fCanShowFlyout)
            {
                s_hwndFlyout = ShowFlyout(hwnd);
            }
            break;

        case NIN_BALLOONTIMEOUT:
            RestoreTooltip();
            break;

        case NIN_BALLOONUSERCLICK:
            RestoreTooltip();
            // placeholder for the user clicking on the balloon.
            MessageBox(hwnd, L"The user clicked on the balloon.", L"User click", MB_OK);
            break;


        // 
        //
        // As you can very plainly see, the Windows SDK Sample ONLY used WM_CONTEXTMNEU
        // 
        //

        case WM_CONTEXTMENU:
            {
                POINT const pt = { LOWORD(wParam), HIWORD(wParam) };
                ShowContextMenu(hwnd, pt);
            }
            break;
        }
        break;

    case WMAPP_HIDEFLYOUT:
        HideFlyout(hwnd, s_hwndFlyout);
        s_hwndFlyout = NULL;
        s_fCanShowFlyout = FALSE;
        break;

    case WM_TIMER:
        if (wParam == HIDEFLYOUT_TIMER_ID)
        {
            // please see the comment in HideFlyout() for an explanation of this code.
            KillTimer(hwnd, HIDEFLYOUT_TIMER_ID);
            s_fCanShowFlyout = TRUE;
        }
        break;
    case WM_DESTROY:
        DeleteNotificationIcon();
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}

2 个答案:

答案 0 :(得分:4)

我认为您应该尝试将uVersion结构的NOTIFYICONDATA成员更改为NOTIFYICON_VERSION_4documentation表示此成员的价值将告诉{{1}传递给回调函数时,将解释参数。

您还可以查看此内容:Basic use of Shell_NotifyIcon in Win32

我做了一些研究,以下内容适合你:

uCallbackMessage

NIM_SETVERSION(MSDN):

  

仅限Shell32.dll 5.0及更高版本。指示通知   区域根据中指定的版本号进行操作   lpdata指向的结构的uVersion成员。版本   number指定识别哪些成员。

答案 1 :(得分:3)

多年来,通知图标改变了行为。出于与预先存在的代码兼容的原因,您必须选择加入新行为。如果您不选择加入,则不会收到WM_CONTEXTMENU条消息。相反,您必须回复WM_RBUTTONUP。即使您从键盘调用上下文菜单,系统仍会发送WM_RBUTTONUP。您必须通过调用GetCursorPos获取光标位置,以便知道显示菜单的位置。

您可以documentation中的说明选择加入新行为(和WM_CONTEXTMENU),Shell_NotifyIcon致电后NIM_SETVERSION通过NIM_ADD 。据推测,您正在查看的SDK示例是在某处做的。我的猜测是你的代码中缺少的东西。

文档中的关键摘录位于备注部分:

  

从Windows 2000(Shell32.dll 5.0版)开始,Shell_NotifyIcon鼠标和键盘事件的处理方式与Microsoft Windows NT 4.0,Windows 95和Windows 98上的早期Shell版本的处理方式不同。差异包括:

     
      
  • 如果用户使用键盘选择通知图标的快捷菜单,则Shell现在会向关联的应用程序发送WM_CONTEXTMENU消息。早期版本发送WM_RBUTTONDOWN和WM_RBUTTONUP消息。
  •   
  • 如果用户使用键盘选择通知图标并使用空格键或ENTER键激活它,则5.0 Shell会向关联的应用程序发送NIN_KEYSELECT通知。早期版本发送WM_RBUTTONDOWN和WM_RBUTTONUP消息。
  •   
  • 如果用户使用鼠标选择通知图标并使用ENTER键激活它,则Shell现在会向关联的应用程序发送NIN_SELECT通知。早期版本发送WM_RBUTTONDOWN和WM_RBUTTONUP消息。
  •