/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * gimpdisplayshell-grab.c
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <gtk/gtk.h>

#include "display-types.h"

#include "gimpdisplayshell.h"
#include "gimpdisplayshell-grab.h"


gboolean
gimp_display_shell_pointer_grab (GimpDisplayShell *shell,
                                 const GdkEvent   *event,
                                 GdkEventMask      event_mask)
{
  g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), FALSE);
  g_return_val_if_fail (shell->pointer_grabbed == FALSE, FALSE);

  if (event)
    {
      GdkGrabStatus status;

      status = gdk_pointer_grab (gtk_widget_get_window (shell->canvas),
                                 FALSE, event_mask, NULL, NULL,
                                 gdk_event_get_time (event));

      if (status != GDK_GRAB_SUCCESS)
        {
          g_printerr ("%s: gdk_pointer_grab failed with status %d\n",
                      G_STRFUNC, status);
          return FALSE;
        }

      shell->pointer_grab_time = gdk_event_get_time (event);
    }

  gtk_grab_add (shell->canvas);

  shell->pointer_grabbed = TRUE;

  return TRUE;
}

void
gimp_display_shell_pointer_ungrab (GimpDisplayShell *shell,
                                   const GdkEvent   *event)
{
  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
  g_return_if_fail (shell->pointer_grabbed == TRUE);

  gtk_grab_remove (shell->canvas);

  if (event)
    {
      gdk_display_pointer_ungrab (gtk_widget_get_display (shell->canvas),
                                  shell->pointer_grab_time);

      shell->pointer_grab_time = 0;
    }

  shell->pointer_grabbed = FALSE;
}

gboolean
gimp_display_shell_keyboard_grab (GimpDisplayShell *shell,
                                  const GdkEvent   *event)
{
  GdkGrabStatus status;

  g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);
  g_return_val_if_fail (shell->keyboard_grabbed == FALSE, FALSE);

  status = gdk_keyboard_grab (gtk_widget_get_window (shell->canvas),
                              FALSE,
                              gdk_event_get_time (event));

  if (status != GDK_GRAB_SUCCESS)
    {
      g_printerr ("%s: gdk_keyboard_grab failed with status %d\n",
                  G_STRFUNC, status);
      return FALSE;
    }

  shell->keyboard_grabbed   = TRUE;
  shell->keyboard_grab_time = gdk_event_get_time (event);

  return TRUE;
}

void
gimp_display_shell_keyboard_ungrab (GimpDisplayShell *shell,
                                    const GdkEvent   *event)
{
  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
  g_return_if_fail (event != NULL);
  g_return_if_fail (shell->keyboard_grabbed == TRUE);

  gdk_display_keyboard_ungrab (gtk_widget_get_display (shell->canvas),
                               shell->keyboard_grab_time);

  shell->keyboard_grabbed   = FALSE;
  shell->keyboard_grab_time = 0;
}
