libs/canvas/test/gtk_many.cc


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#include <iostream>
#include <gtkmm.h>
#include "canvas/canvas.h"
#include "canvas/rectangle.h"

using namespace std;
using namespace ArdourCanvas;

int main (int argc, char* argv[])
{
	Gtk::Main kit (argc, argv);

	Gtk::Window window;
	window.set_title ("Hello world");
	window.set_size_request (512, 512);
	GtkCanvas canvas;
	canvas.set_size_request (2048, 2048);

	int const N = 10000;
	double Ns = sqrt (N);
	int max_x = 1024;
	int max_y = 1024;
	
	for (int x = 0; x < Ns; ++x) {
		for (int y = 0; y < Ns; ++y) {
			Rectangle* r = new Rectangle (canvas.root ());
			r->set (Rect (x * max_x / Ns, y * max_y / Ns, (x + 1) * max_x / Ns, (y + 1) * max_y / Ns));
		}
	}
	
	Gtk::ScrolledWindow scroller;
	scroller.add (canvas);
	window.add (scroller);
	canvas.show ();
	window.show_all ();
	
	Gtk::Main::run (window);
	return 0;
}