Support WM_XBUTTONUP WM_XBUTTONDOWN

[frederich]

ImGui_ImplWin32_WndProcHandler doesn't handle WM_XBUTTONUP WM_XBUTTONDOWN, therefore io.MouseDown[3] and [4] doesn't work.

Version: newest
Branch: master

[ocornut]

Hello Frederich,
That’s correct.
Happy to see a pull request for it!

[frederich]

case WM_XBUTTONDOWN: case WM_XBUTTONDBLCLK:
{
int button = 1;
if (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONDBLCLK) button = GET_XBUTTON_WPARAM(wParam);

    if (!ImGui::IsAnyMouseDown() && ::GetCapture() == NULL)
        ::SetCapture(hwnd);
    button += 2;
    io.MouseDown[button] = true;
    return 0;
}
case WM_XBUTTONUP:
{
    int button = 1;
    if (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONDBLCLK) button = GET_XBUTTON_WPARAM(wParam);

    button += 2;
    io.MouseDown[button] = false;
    if (!ImGui::IsAnyMouseDown() && ::GetCapture() == hwnd)
        ::ReleaseCapture();
    return 0;
}

[ocornut]

Added the proper code to handle XBUTTON 4 and 5 now.