Re: GtkDrawingArea size

[Tadej BorovÅak <tadeboro gmail com>]

Hello.

2012/3/7 Christopher Howard <christopher howard frigidcode com>:
> Hello again. So, I recently started a project to create a certain board
> game (in C) using gtk+, and I just started learning gtk+. I was planning
> to draw the board graphics, pieces, etc. all into one GtkDrawingArea.
> So, how do I fix the size of the drawing area so it doesn't get larger
> or smaller than my graphics?

I would add a wrapper GtkAlignment around my drawing area, set it's
xalign and yalign propertes to 0.5, it's xscale and yscale to 0, pack
GtkDrawingArea inside it and fix it's size using
gtk_window_set_size_request().

Have a look at this simple app:

#include <gtk/gtk.h>

#define WIDTH  300
#define HEIGHT 400

static gboolean
cb_draw (GtkWidget      *w,
         GdkEventExpose *e)
{
  cairo_t *cr = gdk_cairo_create (e->window);
  cairo_set_source_rgb (cr, 1.0, 1.0, 0.0);
  cairo_paint (cr);
  cairo_destroy (cr);

  return TRUE;
}

int
main (int    argc,
      char **argv)
{
  GtkWidget *window,
            *align,
            *area;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  g_signal_connect (window, "destroy", gtk_main_quit, NULL);

  align = gtk_alignment_new (0.5, 0.5, 0, 0);
  gtk_container_add (GTK_CONTAINER (window), align);

  area = gtk_drawing_area_new ();
  gtk_widget_set_size_request (area, WIDTH, HEIGHT);
  g_signal_connect (area, "expose-event", G_CALLBACK (cb_draw), NULL);
  gtk_container_add (GTK_CONTAINER (align), area);

  gtk_widget_show_all (window);

  gtk_main ();

  return 0;
}

Cheers,
Tadej

-- 
Tadej BorovÅak
tadeboro.blogspot.com
tadeboro gmail com
tadej borovsak gmail com