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g01::cairotest.c

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*#include <gtk/gtk.h>
static int
cb_mouse_press(GtkWidget *widget, GdkEventButton *event, gpointer user_data)
{ 
 
  int  x = event->x;
  int y = event->y;
  GdkWindow       *drawable = widget->window;
  cairo_t         *cr;
  cairo_surface_t *surface;  
  if(x >= 500 && y >=500)
    {
      cr = gdk_cairo_create (drawable);
      
      surface = cairo_image_surface_create_from_png ("./kakiku.png");
      cairo_set_source_surface (cr, surface, 0.0, 0.0);
      cairo_paint (cr);
  
      cairo_destroy (cr);
      return FALSE;
    }
  if(x >= 0 && y >=300)
    {
      cr = gdk_cairo_create (drawable);
      
      surface = cairo_image_surface_create_from_png ("./birds.png");
      cairo_set_source_surface (cr, surface, 0.0, 0.0);
      cairo_paint (cr);
  
      cairo_destroy (cr);
      return FALSE;
    }

}

gboolean 
cb_expose_event (GtkWidget       *widget,
		 GdkEventExpose  *event,
		 gpointer        user_data) 
{
  GdkWindow       *drawable = widget->window;
  cairo_t         *cr;
  cairo_surface_t *surface;  
  
  cr = gdk_cairo_create (drawable);

surface = (cairo_surface_t *) user_data;
  cairo_set_source_surface (cr, surface, 0.0, 0.0);
  cairo_paint (cr);
  
  cairo_destroy (cr);

return FALSE;
}

int 
main (int argc, char *argv[])
{
  GtkWidget       *window;
  GtkWidget       *canvas;
  cairo_surface_t *surface, *newsurface;
 
 
  char *name;
  name = "./aiu.png";
  gtk_init (&argc, &argv);

surface = cairo_image_surface_create_from_png (name);

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW(window),
			"cairo_source_image_surface Sample");  
  gtk_widget_set_size_request
    (window,
     cairo_image_surface_get_width(surface)  * 1.0,
     cairo_image_surface_get_height(surface) * 1.0);
  g_signal_connect (G_OBJECT(window), "destroy",
		    G_CALLBACK(gtk_main_quit), NULL);

canvas = gtk_drawing_area_new ();
  gtk_container_add (GTK_CONTAINER(window), canvas);
  gtk_widget_set_events(canvas,GDK_BUTTON_PRESS_MASK);
  g_signal_connect (G_OBJECT(canvas), "expose_event",
		    G_CALLBACK (cb_expose_event), surface);
  g_signal_connect(G_OBJECT(canvas), "button_press_event",
		   G_CALLBACK(cb_mouse_press),NULL);

gtk_widget_show_all (window);
  gtk_main();
  cairo_surface_destroy (surface);
  
  return 0;
}
* >>{g01::稲葉日菜子}{前の画面へ}

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