winapi - 丰富的编辑控件 - 如何使用上下文菜单粘贴文本

Question

I create an edit window this way:

hwndEdit = CreateWindowEx(
   0, 
   MSFTEDIT_CLASS, 
   TEXT("EDIT"),
   WS_BORDER | WS_CHILD | ES_LEFT,
   20, 
   20, 
   100,
   30,
   gHwnd, 
   NULL, 
   hInst, 
   NULL);

I can paste a text using a keyboard shortcut (ctrl + v) but when I use a right mouse button a context menu is not displayed (for a standard edit control it works). I couldn't find any c/c++ example code. How to enable/implement a context menu for a rich edit control ?

Answer 1

It seems that you have created a custom edit window.

You can handle right click on the edit window via checking for WM_CONTEXTMENU in your WndProc.

Grab the handle to the window via the wParam parameter, compare it to your edit window to see if the user right clicked the edit window.

From there, create the popupmenu via CreatePopupMenu() .

Insert/Append into the menu via InsertMenu() / AppendMenu() .

Finally, call TrackPopupMenu() .

Code:

#define IDC_PASTE 102

case WM_CONTEXTMENU:
        if ((HWND)wParam == hwndEdit) 
        {
            m_hMenu = CreatePopupMenu();
            InsertMenu(m_hMenu, 0, MF_BYCOMMAND | MF_STRING | MF_ENABLED, IDC_PASTE, L"Paste");
            TrackPopupMenu(m_hMenu, TPM_TOPALIGN | TPM_LEFTALIGN, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), 0, hWnd, NULL);
    }

Next you need to handle the paste message. As can be seen from the problem, your paste shortcut is still useful, so you can use SendInput to simulate paste.

Code:

 case WM_COMMAND:
        {
            int wmId = LOWORD(wParam);
            // Parse the menu selections:
            switch (wmId)
            {
            case IDC_PASTE:
            {
                SetForegroundWindow(hwndEdit);
                INPUT ip;
                ip.type = INPUT_KEYBOARD;
                ip.ki.wScan = 0;
                ip.ki.time = 0;
                ip.ki.dwExtraInfo = 0;
                // Press the "Ctrl" key
                ip.ki.wVk = VK_CONTROL;
                ip.ki.dwFlags = 0; // 0 for key press
                SendInput(1, &ip, sizeof(INPUT));

                // Press the "V" key
                ip.ki.wVk = 'V';
                ip.ki.dwFlags = 0; // 0 for key press
                SendInput(1, &ip, sizeof(INPUT));

                // Release the "V" key
                ip.ki.wVk = 'V';
                ip.ki.dwFlags = KEYEVENTF_KEYUP;
                SendInput(1, &ip, sizeof(INPUT));

                // Release the "Ctrl" key
                ip.ki.wVk = VK_CONTROL;
                ip.ki.dwFlags = KEYEVENTF_KEYUP;
                SendInput(1, &ip, sizeof(INPUT));
            }
            break;
            ...