Re: [gtkmm] Re: gtkmm 2.4 or gtk 2.4 bug

[Diana Esch-Mosher <desch-mosher lanl gov>]

So I modified the scribble program to check the C API and it did not
exhibit the same problem. I've attached the code. Compiled as  gcc
scribble.c -o test -mms-bitfields `pkg-config gtk+-2.0 --cflags --libs`

So does this identify it as a gtkmm bug?




On Fri, 2004-10-01 at 09:13, Diana Esch-Mosher wrote:
> Er, no. I might be able to try that today. Glad to see its not just a
> windoze thing!
> 
> Diana
> 
> On Fri, 2004-10-01 at 02:26, Cedric Gustin wrote:
> > Diana Esch-Mosher wrote:
> > > On vmware (windows XP professional)
> > > 
> > > A bug! I have attached an example that clearly demonstrates the problem.
> > > Compile as g++ drawingarea.cc -o test `pkg-config gtkmm-2.4 --cflags
> > > --libs`
> > > 
> > > This is just the drawingarea example with 
> > > 
> > >  std::cout << "getting color" << std::endl;
> > >  Glib::RefPtr<Gdk::Colormap> colormap = get_default_colormap ();
> > >  blue_ = Gdk::Color("blue")
> > >  red_ = Gdk::Color("red");
> > >  colormap->alloc_color(blue_);
> > >  colormap->alloc_color(red_);
> > > 
> > > added to the expose event (was cloned from realize event).
> > > 
> > > Lay another window on top and just toggle between to cause expose event.
> > > On the 23rd time it dies with 
> > > 
> > > Gdk-WARNING **: gdkcolor-win32.c:111: DeleteObject failed: Not enough
> > > storage is available to process this command.
> > > 
> > > Very repeatable on 23rd event ....
> > > 
> > > Don't have 2.4 on linux yet, so can't try it there.
> > 
> > Crashes on Fedora Core 2 (linux-2.6.8) after the 46th event. This is 
> > against the recently released gtkmm-2.4.5 rpms from fedora.us.
> > 
> > Did you try with a similar example written only with the GTK+ C API ?
> > 
> > Cedric
> > _______________________________________________
> > gtkmm-list mailing list
> > gtkmm-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtkmm-list
-- 
Diana Esch-Mosher <desch-mosher lanl gov>
Los Alamos National Laboratory

                                                                               
/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <stdlib.h>
#include <stdio.h>
#include <gtk/gtk.h>
  static GtkWidget *drawing_area;

/* Backing pixmap for drawing area */
static GdkPixmap *pixmap = NULL;

/* Create a new backing pixmap of the appropriate size */
static gboolean configure_event( GtkWidget         *widget,
                                 GdkEventConfigure *event )
{
  if (pixmap)
    g_object_unref (pixmap);

  pixmap = gdk_pixmap_new (widget->window,
			   widget->allocation.width,
			   widget->allocation.height,
			   -1);
  gdk_draw_rectangle (pixmap,
		      widget->style->white_gc,
		      TRUE,
		      0, 0,
		      widget->allocation.width,
		      widget->allocation.height);

  return TRUE;
}

/* Redraw the screen from the backing pixmap */
static gboolean expose_event( GtkWidget      *widget,
                              GdkEventExpose *event )
{
	printf("color selection\n");
	fflush(stdout);
        GdkColor blue;
	blue.red = 0;
	blue.green = 0;
        GdkColor red;
	blue.red = 0xff;
	blue.green = 0;
	blue.blue = 0;
        gdk_colormap_alloc_color(
	gtk_widget_get_colormap(GTK_WIDGET(drawing_area)),&blue,FALSE,TRUE);
  gdk_draw_drawable (widget->window,
		     widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
		     pixmap,
		     event->area.x, event->area.y,
		     event->area.x, event->area.y,
		     event->area.width, event->area.height);

  return FALSE;
}

/* Draw a rectangle on the screen */
static void draw_brush( GtkWidget *widget,
                        gdouble    x,
                        gdouble    y)
{
  GdkRectangle update_rect;

  update_rect.x = x - 5;
  update_rect.y = y - 5;
  update_rect.width = 10;
  update_rect.height = 10;
  gdk_draw_rectangle (pixmap,
		      widget->style->black_gc,
		      TRUE,
		      update_rect.x, update_rect.y,
		      update_rect.width, update_rect.height);
  gtk_widget_queue_draw_area (widget, 
		      update_rect.x, update_rect.y,
		      update_rect.width, update_rect.height);
}

static gboolean button_press_event( GtkWidget      *widget,
                                    GdkEventButton *event )
{
  if (event->button == 1 && pixmap != NULL)
    draw_brush (widget, event->x, event->y);

  return TRUE;
}

static gboolean motion_notify_event( GtkWidget *widget,
                                     GdkEventMotion *event )
{
  int x, y;
  GdkModifierType state;

  if (event->is_hint)
    gdk_window_get_pointer (event->window, &x, &y, &state);
  else
    {
      x = event->x;
      y = event->y;
      state = event->state;
    }
    
  if (state & GDK_BUTTON1_MASK && pixmap != NULL)
    draw_brush (widget, x, y);
  
  return TRUE;
}

void quit ()
{
  exit (0);
}

int main( int   argc, 
          char *argv[] )
{
  GtkWidget *window;
  GtkWidget *vbox;

  GtkWidget *button;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_widget_set_name (window, "Test Input");

  vbox = gtk_vbox_new (FALSE, 0);
  gtk_container_add (GTK_CONTAINER (window), vbox);
  gtk_widget_show (vbox);

  g_signal_connect (G_OBJECT (window), "destroy",
                    G_CALLBACK (quit), NULL);

  /* Create the drawing area */

  drawing_area = gtk_drawing_area_new ();
  gtk_widget_set_size_request (GTK_WIDGET (drawing_area), 200, 200);
  gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);

  gtk_widget_show (drawing_area);

  /* Signals used to handle backing pixmap */

  g_signal_connect (G_OBJECT (drawing_area), "expose_event",
		    G_CALLBACK (expose_event), NULL);
  g_signal_connect (G_OBJECT (drawing_area),"configure_event",
		    G_CALLBACK (configure_event), NULL);

  /* Event signals */

  g_signal_connect (G_OBJECT (drawing_area), "motion_notify_event",
		    G_CALLBACK (motion_notify_event), NULL);
  g_signal_connect (G_OBJECT (drawing_area), "button_press_event",
		    G_CALLBACK (button_press_event), NULL);

  gtk_widget_set_events (drawing_area, GDK_EXPOSURE_MASK
			 | GDK_LEAVE_NOTIFY_MASK
			 | GDK_BUTTON_PRESS_MASK
			 | GDK_POINTER_MOTION_MASK
			 | GDK_POINTER_MOTION_HINT_MASK);

  /* .. And a quit button */
  button = gtk_button_new_with_label ("Quit");
  gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);

  g_signal_connect_swapped (G_OBJECT (button), "clicked",
			    G_CALLBACK (gtk_widget_destroy),
			    G_OBJECT (window));
  gtk_widget_show (button);

  gtk_widget_show (window);

  gtk_main ();

  return 0;
}