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livetrax/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;
}