Making a custom titlebar

support
3

If you know Win32 code it is possible to alter GLFW to get borderless with snapping to work, but you’ll need to implement your own move and size controls.

See:

The basic changes in win32_window.c were:

static DWORD getWindowStyle(const _GLFWwindow* window)
{
    DWORD style = WS_CLIPSIBLINGS | WS_CLIPCHILDREN;

    if (window->monitor)
        style |= WS_POPUP;
    else
    {
        style |= WS_SYSMENU | WS_MINIMIZEBOX;

        if (window->decorated)
        {
            style |= WS_CAPTION;

            if (window->resizable)
                style |= WS_MAXIMIZEBOX | WS_THICKFRAME;
        }
        else
            style |= WS_POPUP | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_CAPTION;
    }

    return style;
}

and also add the following on lines 1118 in win32_window.c just before the case WM_PAINT line.

        case WM_NCCALCSIZE:
        if (!window->decorated) {
            return 0;
        }
        break;

This maximizes slightly weirdly for me so it may need some further work.