how to limit the size of a window?

[WEBER Luc <luc weber obs unige ch>]

Hi,

I'm trying to limit the size of a window containing a drawing area at
the maximum size of this drawing area. I want to accept a smaller window
but I want to limit the size in both axes if the user try to make a
window larger.

I do that in a configure_event with a gtk_widget_set_usize().

The problem is:  the system goes in a infinite loop when I modify the
size of the widow with the mouse.

In this example, I want to limit the size to 256x256 pixels.

Many thanks in advance

Luc Weber



main()
{
...
 gtk_signal_connect (GTK_OBJECT(image_drawing_area),"configure_event",
        (GtkSignalFunc) configure_event, NULL);
...
}

static gint configure_event( GtkWidget         *widget,
                             GdkEventConfigure *event )
{
 gint  width, height;
 gint  width_r, height_r;
 GdkWindow *window;

  width_r   = widget->parent->requisition.width;
  height_r  = widget->parent->requisition.height;
  printf("configure_event %d requisition  %d %d\n", widget, width_r,
height_r);
  width   = widget->parent->allocation.width;
  height  = widget->parent->allocation.height;
  printf("configure_event %d allocation  %d %d\n", widget, width,
height);

  if(width_r == width && height_r == height)
        return TRUE;
  gtk_window_set_policy(GTK_WINDOW (image_window), FALSE, FALSE, TRUE);
  gtk_widget_set_usize(image_window, -1, -1);
  if(width>256)
           width = 256;
  if(height>256)
           height = 256;
  printf("-----> size %d %d\n",width,height);
  gtk_widget_set_usize(image_window, width,height);
  gtk_window_set_policy(GTK_WINDOW (image_window), TRUE, TRUE, TRUE);

 return TRUE;
}

--
luc weber obs unige ch