Drag&Drop von Dateien auf TrayIcon

[toms]

Zitat von der_kumpel:

Ich vermute mal, dass der wichtige Teil in der Drag-Drop.cpp steht,
allerdings versteh ich da kaum was.

Genau, dort befindet sich der HOOK.
Ist ein WH_GETMESSAGE Hook.

Probiere mal einige Funktionen zu übersetzen.
Diese sollte nicht allzu schwer sein.

Code:

BOOL FileDroppedAtIcon(const HWND a_hWndOwner, const int a_iButtonID, const PPOINT pPoint)
{
    HWND hWndTray = FindTrayToolbarWindow();

    //now we have to get an ID of the parent process for system tray
    DWORD dwTrayProcessID = -1;
    GetWindowThreadProcessId(hWndTray, &dwTrayProcessID);

    //here we get a handle to tray application process
    HANDLE hTrayProc = OpenProcess(PROCESS_ALL_ACCESS, 0, dwTrayProcessID);
 
    //now we check how many buttons is there - should be more than 0
    int iButtonsCount = SendMessage(hWndTray, TB_BUTTONCOUNT, 0, 0);

    //We want to get data from another process - it's not possible 
    //to just send messages like TB_GETBUTTON with a locally
    //allocated buffer for return data. Pointer to locally allocated 
    //data has no usefull meaning in a context of another
    //process (since Win95) - so we need 
    //to allocate some memory inside Tray process.
    //We allocate sizeof(TBBUTTON) bytes of memory - 
    //because TBBUTTON is the biggest structure we will fetch. 
    //But this buffer will be also used to get smaller 
    //pieces of data like RECT structures.
    LPVOID lpData = VirtualAllocEx(hTrayProc, NULL, 
                    sizeof(TBBUTTON), MEM_COMMIT, PAGE_READWRITE);

    BOOL bIconFound = FALSE;

    for(int iButton=0; iButton<iButtonsCount; iButton++)
    {
        //first let's read TBUTTON information 
        //about each button in a task bar of tray

        DWORD dwBytesRead = -1;
        TBBUTTON buttonData;
        SendMessage(hWndTray, TB_GETBUTTON, iButton, (LPARAM)lpData);

        //we filled lpData with details of iButton icon of toolbar 
        //- now let's copy this data from tray application
        //back to our process
        ReadProcessMemory(hTrayProc, lpData, &buttonData, sizeof(TBBUTTON), &dwBytesRead);

        //let's read extra data of each button: 
        //there will be a HWND of the window that 
        //created an icon and icon ID
        DWORD dwExtraData[2] = { 0,0 };
        ReadProcessMemory(hTrayProc, (LPVOID)buttonData.dwData,dwExtraData, sizeof(dwExtraData), &dwBytesRead);

        HWND hWndOfIconOwner = (HWND) dwExtraData[0];
        int  iIconId         = (int)  dwExtraData[1];

        if(hWndOfIconOwner != a_hWndOwner || iIconId != a_iButtonID)
        {
            continue;
        }

        //we found our icon - in WinXP it could be hidden - let's check it:
        if( buttonData.fsState & TBSTATE_HIDDEN )
        {
            break;
        }

        //now just ask a tool bar of rectangle of our icon
        RECT rcPosition = {0,0};
        SendMessage(hWndTray, TB_GETITEMRECT, iButton, (LPARAM)lpData);
       // ReadProcessMemory(hTrayProc, lpData, lprcPosition/*&rcPosition*/, sizeof(RECT), &dwBytesRead);
      ReadProcessMemory(hTrayProc, lpData, &rcPosition, sizeof(RECT), &dwBytesRead);

      MapWindowRect(hWndTray,NULL,&rcPosition);

      if (pPoint->x > rcPosition.left && pPoint->x < rcPosition.right &&
         pPoint->y > rcPosition.top && pPoint->y < rcPosition.bottom)
      {
         OutputDebugString("Stuff dropped at our icon...!!!");   

         bIconFound = TRUE;
         break;
      }

        break;
    }

    VirtualFreeEx(hTrayProc, lpData, NULL, MEM_RELEASE);
    CloseHandle(hTrayProc);

    return bIconFound;
}