/* MS-Windows Engine (aka GTK-Wimp)

 *

 * Copyright (C) 2003, 2004 Raymond Penners <raymond@dotsphinx.com>

 * Includes code adapted from redmond95 by Owen Taylor, and

 * gtk-nativewin by Evan Martin

 *

 * 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 <windows.h>

#include <gmodule.h>

#include "gtk/gtk.h"

#include "msw_style.h"

#include "msw_rc_style.h"

#include "xp_theme.h"

#ifndef WM_THEMECHANGED

#define WM_THEMECHANGED 0x031A	/* winxp only */

#endif

static GModule *this_module = NULL;

static void (*msw_rc_reset_styles) (GtkSettings *settings) = NULL;

static GdkWindow *hidden_msg_window = NULL;

static GdkWindow *

create_hidden_msg_window (void)

{

  GdkWindowAttr attributes;

  gint attributes_mask;

  attributes.x = -100;

  attributes.y = -100;

  attributes.width = 10;

  attributes.height = 10;

  attributes.window_type = GDK_WINDOW_TEMP;

  attributes.wclass = GDK_INPUT_ONLY;

  attributes.override_redirect = TRUE;

  attributes.event_mask = 0;

  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;

  return gdk_window_new (gdk_get_default_root_window (),

			 &attributes, attributes_mask);

}

static GdkFilterReturn

global_filter_func (void *xevent, GdkEvent *event, gpointer data)

{

  MSG *msg = (MSG *) xevent;

  switch (msg->message)

    {

      /* catch theme changes */

    case WM_THEMECHANGED:

    case WM_SYSCOLORCHANGE:

      if (msw_rc_reset_styles != NULL)

	{

	  xp_theme_reset ();

	  msw_style_init ();

	  /* force all gtkwidgets to redraw */

	  (*msw_rc_reset_styles) (gtk_settings_get_default ());

	}

      return GDK_FILTER_REMOVE;

    case WM_SETTINGCHANGE:

      /* catch cursor blink, etc... changes */

      msw_style_setup_system_settings ();

      return GDK_FILTER_REMOVE;

    default:

      return GDK_FILTER_CONTINUE;

    }

}

G_MODULE_EXPORT void

theme_init (GTypeModule * module)

{

  msw_rc_style_register_type (module);

  msw_style_register_type (module);

  /* this craziness is required because only gtk 2.4.x and later have

     gtk_rc_reset_styles(). But we want to be able to run acceptly well on

     any GTK 2.x.x platform. */

  if (gtk_check_version (2, 4, 0) == NULL)

    {

      this_module = g_module_open (NULL, 0);

      if (this_module)

	g_module_symbol (this_module, "gtk_rc_reset_styles",

			 (gpointer *) (&msw_rc_reset_styles));

    }

  msw_style_init ();

  hidden_msg_window = create_hidden_msg_window ();

  gdk_window_add_filter (hidden_msg_window, global_filter_func, NULL);

}

G_MODULE_EXPORT void

theme_exit (void)

{

  gdk_window_remove_filter (hidden_msg_window, global_filter_func, NULL);

  gdk_window_destroy (hidden_msg_window);

  hidden_msg_window = NULL;

  msw_style_finalize ();

  if (this_module)

    {

      g_module_close (this_module);

      this_module = NULL;

    }

}

G_MODULE_EXPORT GtkRcStyle *

theme_create_rc_style (void)

{

  return g_object_new (MSW_TYPE_RC_STYLE, NULL);

}

/* The following function will be called by GTK+ when the module

 * is loaded and checks to see if we are compatible with the

 * version of GTK+ that loads us.

 */

G_MODULE_EXPORT const gchar *

g_module_check_init (GModule *module)

{

  return gtk_check_version (2, 0, 0);

}