How to launch a window as a function of the size of the screen?

Question

I am trying to find a solution to launch a window as a function of the size of the screen. I know there is the method resize() of the Gtk::Window but it is only pixels and not percent that's the problem.

Thank you !

Answer 1

You can get the screen width and height in pixels in a quick and dirty way like this:

#include <Windows.h>    // Need this to get the screen resolution.

// Get the horizontal and vertical screen sizes in pixels:
static void GetDesktopResolution(int& horizontal, int& vertical) {
    SetProcessDPIAware();

    horizontal = GetSystemMetrics(SM_CXVIRTUALSCREEN);
    vertical =   GetSystemMetrics(SM_CYVIRTUALSCREEN);
}

For more advanced functionality, like dealing with multiple monitors, check out the link from the first comment on your question. The answers there are not just for OpenGL.