/* 
 * Ardesia -- a program for painting on the screen
 * with this program you can play, draw, learn and teach
 * This program has been written such as a freedom sonet
 * We believe in the freedom and in the freedom of education
 *
 * Copyright (C) 2009 Pilolli Pietro <pilolli.pietro@gmail.com>
 *
 * Ardesia 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.
 * 
 * Ardesia 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 <utils.h>
#include <preference_dialog.h>
#include <background_window.h>


/* Update the preview image. */
G_MODULE_EXPORT void
on_image_chooser_button_update_preview (GtkFileChooser *file_chooser,
					gpointer data)
{
  PreferenceData *preference_data = (PreferenceData *) data;
  gchar *filename;
  GdkPixbuf *pixbuf;
  gboolean have_preview;

  filename = gtk_file_chooser_get_preview_filename (file_chooser);

  if (filename)
    {
      pixbuf = gdk_pixbuf_new_from_file_at_size (filename, 128, 128, NULL);
      have_preview = (pixbuf != NULL);
      g_free (filename);
      filename = NULL;

      gtk_image_set_from_pixbuf (GTK_IMAGE (preference_data->preview), pixbuf);

      if (pixbuf)
        {
          gdk_pixbuf_unref (pixbuf);
          pixbuf = NULL;
        }

      gtk_file_chooser_set_preview_widget_active (file_chooser, have_preview);
    }
}


/* Shot when the selected folder change in the file browser. */
G_MODULE_EXPORT void
on_image_chooser_button_file_set (GtkButton *buton,
				  gpointer data)
{
  PreferenceData *preference_data = (PreferenceData *) data;
  GObject *file_obj = gtk_builder_get_object (preference_data->preference_dialog_gtk_builder, "file");
  GtkToggleButton *image_tool_button = GTK_TOGGLE_BUTTON (file_obj);
  gtk_toggle_button_set_active (image_tool_button, TRUE);
}


/* Shot when is pushed the background colour button. */
G_MODULE_EXPORT void
on_background_color_button_color_set (GtkButton *buton,
				      gpointer data)
{
  PreferenceData *preference_data = (PreferenceData *) data;
  GObject *color_obj = gtk_builder_get_object (preference_data->preference_dialog_gtk_builder, "color");
  GtkToggleButton *color_tool_button = GTK_TOGGLE_BUTTON (color_obj);
  gtk_toggle_button_set_active (color_tool_button, TRUE);
}


/* Shot when the ok button in preference dialog is pushed. */
G_MODULE_EXPORT void
on_preference_ok_button_clicked (GtkButton *buton,
				 gpointer data)
{
  PreferenceData *preference_data = (PreferenceData*) data;
  gchar *rgb = NULL;
  gchar *a = NULL;
  gchar *rgba = NULL;
  GObject *color_tool_obj = gtk_builder_get_object (preference_data->preference_dialog_gtk_builder, "color");
  GtkToggleButton *color_tool_button = GTK_TOGGLE_BUTTON (color_tool_obj);

  if (gtk_toggle_button_get_active (color_tool_button))
    {
      /* background colour */
      GObject *bg_color_obj = gtk_builder_get_object (preference_data->preference_dialog_gtk_builder,
						      "backgroundColorButton");

      GtkColorButton *background_color_button = GTK_COLOR_BUTTON (bg_color_obj);
      GdkColor *gdkcolor = g_malloc ( (gsize) sizeof (GdkColor));
      gtk_color_button_get_color (background_color_button, gdkcolor);

      rgb = gdkcolor_to_rgb (gdkcolor);
      a = g_strdup_printf ("%02x", gtk_color_button_get_alpha (background_color_button)/257);
      rgba = g_strdup_printf ("%s%s", rgb, a);
      
      update_background_color (rgba);

      g_free (a);
      g_free (rgb);
      g_free (rgba);
      g_free (gdkcolor);
      set_background_type (1);
    }
  else
    {
      GObject *file_obj = gtk_builder_get_object (preference_data->preference_dialog_gtk_builder, "file");
      GtkToggleButton *image_tool_button = GTK_TOGGLE_BUTTON (file_obj);
      if (gtk_toggle_button_get_active (image_tool_button))
	{
	  /* background png from file */
	  GObject *image_obj = gtk_builder_get_object (preference_data->preference_dialog_gtk_builder,
						       "imageChooserButton");

	  GtkFileChooserButton *image_chooser_button = GTK_FILE_CHOOSER_BUTTON (image_obj);
	  gchar *filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (image_chooser_button));

	  if (filename)
            {
              FILE *stream = g_fopen (filename, "r");
              if (stream == NULL)
                {
                  GObject *preference_obj = (GObject *) NULL;
                  GtkWindow *preference_window = (GtkWindow *) NULL;
                  preference_obj = gtk_builder_get_object (preference_data->preference_dialog_gtk_builder, "preferences");
                  preference_window = GTK_WINDOW (preference_obj);
                  show_permission_denied_dialog (preference_window);
                }
              else
                {
                  update_background_image (filename);
                  set_background_type (2);
                  fclose (stream);
                }
            }
          else
            {
              /* The file is not set; same cae that no background */
	      clear_background_window ();
              set_background_type (0);
            }

	}
      else
	{
	  /* none */
	  clear_background_window ();
          set_background_type (0);
	}
    }

}


/* Shot when is pushed the cancel button. */
G_MODULE_EXPORT void
on_preference_cancel_button_clicked    (GtkButton *buton,
					gpointer data)
{
  /* do nothing */
}