Re: Multiple Monitors

[Oscar Lazzarino <oscar lazzarino i-m3d com>]

On 06/11/2010 02:07 PM, Talguy wrote:
> I would like to use my application with multiple monitors.  My app
> consist of two windows, from what I was reading in the documentation I
> would use gdk::screen to determine how many monitors there are and then
> move each window into its own monitor by determining the monitor
> rectangle and then use gtk::Window::move to move the window.  Once the
> window is in the proper monitor I can us the fullscreen command to set
> the window to fullscreen.
>
> Does this sound about right to create a two window fullscreen
> application for a dual monitor setup?
> Talguy

That's exactly the way we do.

Be aware that you can have one display with many screen, one for each 
monitor (multiple screens), or you can have one display with only one 
screen that can span many monitor (xinerama).

The attached code shoud work with both configs

Regards.

O.

#include <gtkmm.h>
#include <iostream>
#include <vector>

int main(int argc, char *argv[])
{
	Gtk::Main lKit(argc, argv);
	std::vector<Gtk::Window *> lWindows;

	Glib::RefPtr<Gdk::Display> lDisplay = Gdk::Display::get_default();
	int lScreenCount = lDisplay->get_n_screens();

	std::cout << "Display has " << lScreenCount << " screens\n";
	for (int s = 0; s < lScreenCount; s++)
	{
		Glib::RefPtr<Gdk::Screen> lScreen = lDisplay->get_screen(s);
		int lMonitorCount = lScreen->get_n_monitors();
		std::cout << "    Screen " << s << " has " << lMonitorCount << " monitors\n";
		for (int m = 0; m < lMonitorCount; m++)
		{
			std::cout << "        Opening window on Screen " << s << ", monitor " << m << std::endl;   
			Gtk::Window *lWindow = new Gtk::Window;
			lWindow->set_screen(lScreen);
			Gdk::Rectangle lMonitorRect;
			lScreen->get_monitor_geometry(m, lMonitorRect);
			lWindow->move(lMonitorRect.get_x(), lMonitorRect.get_y());
			lWindow->fullscreen();
			lWindow->show();

			lWindows.push_back(lWindow);

		}
	}

	Gtk::Main::run();
}