head	1.3;
access;
symbols;
locks; strict;
comment	@ * @;


1.3
date	2005.08.15.05.31.38;	author behdad;	state Exp;
branches;
next	1.2;
commitid	6044430028b14567;

1.2
date	2005.08.12.07.24.27;	author behdad;	state Exp;
branches;
next	1.1;
commitid	75b042fc4e5b4567;

1.1
date	2004.11.11.17.49.08;	author pippin;	state Exp;
branches;
next	;


desc
@@


1.3
log
@2005-08-15  Behdad Esfahbod  <behdad@@behdad.org>

        * hello.c: fix signature of paint to match those of expose-event.
@
text
@/*  hello world for gtk with cairo support, by Øvyind Kolås
 */

#include <gtk/gtk.h>
#include <cairo.h>

#define DEFAULT_WIDTH  400
#define DEFAULT_HEIGHT 200

/* forward definition of actual painting function for our drawing area widget
 */
static void paint (GtkWidget      *widget,
		   GdkEventExpose *eev,
                   gpointer        data);

gint
main (gint    argc,
      gchar **argv)
{
  GtkWidget *window;
  GtkWidget *canvas;

  gtk_init (&argc, &argv);

  /* create a new top level window
   */
  window   = gtk_window_new (GTK_WINDOW_TOPLEVEL);

  /* make the gtk terminate the process the close button is pressed
   */
  g_signal_connect (G_OBJECT (window), "delete-event",
                    G_CALLBACK (gtk_main_quit), NULL);

  /* create a new drawing area widget
   */
  canvas = gtk_drawing_area_new ();

  /* set a requested (minimum size) for the canvas
   */
  gtk_widget_set_size_request (canvas, DEFAULT_WIDTH, DEFAULT_HEIGHT);

  /* connect our drawing method to the "expose" signal
   */
  g_signal_connect (G_OBJECT (canvas), "expose-event",
                    G_CALLBACK (paint),
                    NULL  /*< here we can pass a pointer to a custom data structure */
                  );

  /* pack canvas widget into window
   */
  gtk_container_add (GTK_CONTAINER (window), canvas);

  /* show window and all it's children (just the canvas widget)
   */
  gtk_widget_show_all (window);
 
  /* enter main loop
   */ 
  gtk_main ();
  return 0;
}


/* the actual function invoked to paint the canvas
 * widget, this is where most cairo painting functions
 * will go
 */
static void
paint (GtkWidget      *widget,
       GdkEventExpose *eev,
       gpointer        data)
{
  gint width, height;
  gint i;
  cairo_t *cr;

  width  = widget->allocation.width;
  height = widget->allocation.height;
  
  cr = gdk_cairo_create (widget->window);
  
    /* clear background */
    cairo_set_source_rgb (cr, 1,1,1);
    cairo_paint (cr);


    cairo_select_font_face (cr, "Sans", CAIRO_FONT_SLANT_NORMAL,
                                        CAIRO_FONT_WEIGHT_BOLD);

    /* enclosing in a save/restore pair since we alter the
     * font size
     */
    cairo_save (cr);
      cairo_set_font_size (cr, 40);
      cairo_move_to (cr, 40, 60);
      cairo_set_source_rgb (cr, 0,0,0);
      cairo_show_text (cr, "Hello World");
    cairo_restore (cr);

    cairo_set_source_rgb (cr, 1,0,0);
    cairo_set_font_size (cr, 20);
    cairo_move_to (cr, 50, 100);
    cairo_show_text (cr, "greetings from gtk and cairo");

    cairo_set_source_rgb (cr, 0,0,1);

    cairo_move_to (cr, 0, 150);
    for (i=0; i< width/10; i++)
      {
        cairo_rel_line_to (cr, 5,  10);
        cairo_rel_line_to (cr, 5, -10);
      }
    cairo_stroke (cr);

  cairo_destroy (cr);
}
@


1.2
log
@2005-08-12  Behdad Esfahbod  <behdad@@behdad.org>

        * hello.c, mouse_events.c: updated to latest cairo+gtk api.
	* README: noted the change from gtkcairo to cairo+gtk.
@
text
@d12 3
a14 2
static void paint (GtkWidget *widget,
                   gpointer   data);
d69 3
a71 2
paint (GtkWidget *widget,
       gpointer   data)
@


1.1
log
@added simple gtkcairo demo
@
text
@d1 1
a1 1
/*  hello world for gtkcairo, by Øvyind Kolås
d5 1
a5 1
#include <gtkcairo.h>
d10 1
a10 1
/* forward definition of actual painting function for our gtkcairo widget
a12 1
                   cairo_t   *cr,
d20 1
a20 1
  GtkWidget *gtkcairo;
d33 1
a33 1
  /* create a new gtkcairo widget
d35 1
a35 1
  gtkcairo = gtk_cairo_new ();
d37 1
a37 1
  /* set a requested (minimum size) for the gtkcairo widget
d39 1
a39 1
  gtk_widget_set_size_request (gtkcairo, DEFAULT_WIDTH, DEFAULT_HEIGHT);
d41 1
a41 1
  /* connect our drawing method to the "paint" signal
d43 1
a43 1
  g_signal_connect (G_OBJECT (gtkcairo), "paint",
d48 1
a48 1
  /* pack gtkcairo widget into window
d50 1
a50 1
  gtk_container_add (GTK_CONTAINER (window), gtkcairo);
d52 1
a52 1
  /* show window and all it's children (just the gtkcairo widget)
d63 1
a63 1
/* the actual function invoked to paint the gtkcairo
a68 1
       cairo_t   *cr,
d73 1
d78 1
a78 5
  /* enclosing the painting function in a save/restore pair is a
   * good idea since we'll return to a sane state then
   */

  cairo_save (cr);
d81 2
a83 3
    cairo_rectangle (cr, 0, 0, width, height);
    cairo_set_rgb_color (cr, 1,1,1);
    cairo_fill (cr);
d85 2
a86 3

    cairo_select_font (cr, "Sans", CAIRO_FONT_SLANT_NORMAL,
                                   CAIRO_FONT_WEIGHT_BOLD);
d92 1
a92 1
      cairo_scale_font (cr, 40);
d94 1
a94 1
      cairo_set_rgb_color (cr, 0,0,0);
d98 2
a99 2
    cairo_set_rgb_color (cr, 1,0,0);
    cairo_scale_font (cr, 20);
d103 1
a103 1
    cairo_set_rgb_color (cr, 0,0,1);
a110 1

d113 1
a113 1
  cairo_restore (cr);
@