/*

 * GTK - The GIMP Toolkit

 * Copyright (C) 1998, 1999 Red Hat, Inc.

 * All rights reserved.

 *

 * 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 the Gnome Library; see the file COPYING.LIB.  If not,

 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

/* Color picker button for GNOME

 *

 * Author: Federico Mena <federico@nuclecu.unam.mx>

 *

 * Modified by the GTK+ Team and others 2003.  See the AUTHORS

 * file for a list of people on the GTK+ Team.  See the ChangeLog

 * files for a list of changes.  These files are distributed with

 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 

 */

#include "config.h"

#include "gtkcolorbutton.h"

#include "gdk/gdkkeysyms.h"

#include "gdk-pixbuf/gdk-pixbuf.h"

#include "gtkbutton.h"

#include "gtkmain.h"

#include "gtkalignment.h"

#include "gtkcolorsel.h"

#include "gtkcolorseldialog.h"

#include "gtkdnd.h"

#include "gtkdrawingarea.h"

#include "gtkframe.h"

#include "gtkmarshalers.h"

#include "gtkprivate.h"

#include "gtkintl.h"

#include "gtkalias.h"

/* Size of checks and gray levels for alpha compositing checkerboard */

#define CHECK_SIZE  4

#define CHECK_DARK  (1.0 / 3.0)

#define CHECK_LIGHT (2.0 / 3.0)

#define GTK_COLOR_BUTTON_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_COLOR_BUTTON, GtkColorButtonPrivate))

struct _GtkColorButtonPrivate 

{

  GtkWidget *draw_area; /* Widget where we draw the color sample */

  GtkWidget *cs_dialog; /* Color selection dialog */

  gchar *title;         /* Title for the color selection window */

  GdkColor color;

  guint16 alpha;

  guint use_alpha : 1;  /* Use alpha or not */

};

/* Properties */

enum 

{

  PROP_0,

  PROP_USE_ALPHA,

  PROP_TITLE,

  PROP_COLOR,

  PROP_ALPHA

};

/* Signals */

enum 

{

  COLOR_SET,

  LAST_SIGNAL

};

/* gobject signals */

static void gtk_color_button_finalize      (GObject             *object);

static void gtk_color_button_set_property  (GObject        *object,

					    guint           param_id,

					    const GValue   *value,

					    GParamSpec     *pspec);

static void gtk_color_button_get_property  (GObject        *object,

					    guint           param_id,

					    GValue         *value,

					    GParamSpec     *pspec);

/* gtkwidget signals */

static void gtk_color_button_state_changed (GtkWidget           *widget, 

					    GtkStateType         previous_state);

/* gtkbutton signals */

static void gtk_color_button_clicked       (GtkButton           *button);

/* source side drag signals */

static void gtk_color_button_drag_begin (GtkWidget        *widget,

					 GdkDragContext   *context,

					 gpointer          data);

static void gtk_color_button_drag_data_get (GtkWidget        *widget,

                                            GdkDragContext   *context,

                                            GtkSelectionData *selection_data,

                                            guint             info,

                                            guint             time,

                                            GtkColorButton   *color_button);

/* target side drag signals */

static void gtk_color_button_drag_data_received (GtkWidget        *widget,

						 GdkDragContext   *context,

						 gint              x,

						 gint              y,

						 GtkSelectionData *selection_data,

						 guint             info,

						 guint32           time,

						 GtkColorButton   *color_button);

static guint color_button_signals[LAST_SIGNAL] = { 0 };

static const GtkTargetEntry drop_types[] = { { "application/x-color", 0, 0 } };

G_DEFINE_TYPE (GtkColorButton, gtk_color_button, GTK_TYPE_BUTTON)

static void

gtk_color_button_class_init (GtkColorButtonClass *klass)

{

  GObjectClass *gobject_class;

  GtkWidgetClass *widget_class;

  GtkButtonClass *button_class;

  gobject_class = G_OBJECT_CLASS (klass);

  widget_class = GTK_WIDGET_CLASS (klass);

  button_class = GTK_BUTTON_CLASS (klass);

  gobject_class->get_property = gtk_color_button_get_property;

  gobject_class->set_property = gtk_color_button_set_property;

  gobject_class->finalize = gtk_color_button_finalize;

  widget_class->state_changed = gtk_color_button_state_changed;

  button_class->clicked = gtk_color_button_clicked;

  klass->color_set = NULL;

  /**

   * GtkColorButton:use-alpha:

   *

   * If this property is set to %TRUE, the color swatch on the button is rendered against a 

   * checkerboard background to show its opacity and the opacity slider is displayed in the 

   * color selection dialog. 

   *

   * Since: 2.4

   */

  g_object_class_install_property (gobject_class,

                                   PROP_USE_ALPHA,

                                   g_param_spec_boolean ("use-alpha", P_("Use alpha"), 

                                                         P_("Whether or not to give the color an alpha value"),

                                                         FALSE,

                                                         GTK_PARAM_READWRITE));

  /**

   * GtkColorButton:title:

   *

   * The title of the color selection dialog

   *

   * Since: 2.4

   */

  g_object_class_install_property (gobject_class,

                                   PROP_TITLE,

                                   g_param_spec_string ("title", 

							P_("Title"), 

                                                        P_("The title of the color selection dialog"),

                                                        _("Pick a Color"),

                                                        GTK_PARAM_READWRITE));

  /**

   * GtkColorButton:color:

   *

   * The selected color.

   *

   * Since: 2.4

   */

  g_object_class_install_property (gobject_class,

                                   PROP_COLOR,

                                   g_param_spec_boxed ("color",

                                                       P_("Current Color"),

                                                       P_("The selected color"),

                                                       GDK_TYPE_COLOR,

                                                       GTK_PARAM_READWRITE));

  /**

   * GtkColorButton:alpha:

   *

   * The selected opacity value (0 fully transparent, 65535 fully opaque). 

   *

   * Since: 2.4

   */

  g_object_class_install_property (gobject_class,

                                   PROP_ALPHA,

                                   g_param_spec_uint ("alpha",

                                                      P_("Current Alpha"),

                                                      P_("The selected opacity value (0 fully transparent, 65535 fully opaque)"),

                                                      0, 65535, 65535,

                                                      GTK_PARAM_READWRITE));

  /**

   * GtkColorButton::color-set:

   * @widget: the object which received the signal.

   * 

   * The ::color-set signal is emitted when the user selects a color. 

   * When handling this signal, use gtk_color_button_get_color() and 

   * gtk_color_button_get_alpha() to find out which color was just selected.

   *

   * Note that this signal is only emitted when the <emphasis>user</emphasis>

   * changes the color. If you need to react to programmatic color changes

   * as well, use the notify::color signal.

   *

   * Since: 2.4

   */

  color_button_signals[COLOR_SET] = g_signal_new (I_("color-set"),

						  G_TYPE_FROM_CLASS (gobject_class),

						  G_SIGNAL_RUN_FIRST,

						  G_STRUCT_OFFSET (GtkColorButtonClass, color_set),

						  NULL, NULL,

						  _gtk_marshal_VOID__VOID,

						  G_TYPE_NONE, 0);

  g_type_class_add_private (gobject_class, sizeof (GtkColorButtonPrivate));

}

static gboolean

gtk_color_button_has_alpha (GtkColorButton *color_button)

{

  return color_button->priv->use_alpha &&

      color_button->priv->alpha < 65535;

}

static cairo_pattern_t *

gtk_color_button_get_checkered (void)

{

  /* need to respect pixman's stride being a multiple of 4 */

  static unsigned char data[8] = { 0xFF, 0x00, 0x00, 0x00,

                                   0x00, 0xFF, 0x00, 0x00 };

  static cairo_surface_t *checkered = NULL;

  cairo_pattern_t *pattern;

  if (checkered == NULL)

    {

      checkered = cairo_image_surface_create_for_data (data,

                                                       CAIRO_FORMAT_A8,

                                                       2, 2, 4);

    }

  pattern = cairo_pattern_create_for_surface (checkered);

  cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);

  cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);

  return pattern;

}

/* Handle exposure events for the color picker's drawing area */

static gint

expose_event (GtkWidget      *widget, 

              GdkEventExpose *event, 

              gpointer        data)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (data);

  GtkAllocation allocation;

  cairo_pattern_t *checkered;

  cairo_t *cr;

  cr = gdk_cairo_create (event->window);

  gtk_widget_get_allocation (widget, &allocation);

  gdk_cairo_rectangle (cr, &allocation);

  cairo_clip (cr);

  if (gtk_color_button_has_alpha (color_button))

    {

      cairo_save (cr);

      cairo_set_source_rgb (cr, CHECK_DARK, CHECK_DARK, CHECK_DARK);

      cairo_paint (cr);

      cairo_set_source_rgb (cr, CHECK_LIGHT, CHECK_LIGHT, CHECK_LIGHT);

      cairo_scale (cr, CHECK_SIZE, CHECK_SIZE);

      checkered = gtk_color_button_get_checkered ();

      cairo_mask (cr, checkered);

      cairo_pattern_destroy (checkered);

      cairo_restore (cr);

      cairo_set_source_rgba (cr,

                             color_button->priv->color.red / 65535.,

                             color_button->priv->color.green / 65535.,

                             color_button->priv->color.blue / 65535.,

                             color_button->priv->alpha / 65535.);

    }

  else

    {

      gdk_cairo_set_source_color (cr, &color_button->priv->color);

    }

  cairo_paint (cr);

  if (!gtk_widget_is_sensitive (GTK_WIDGET (color_button)))

    {

      gdk_cairo_set_source_color (cr, &GTK_WIDGET(color_button)->style->bg[GTK_STATE_INSENSITIVE]);

      checkered = gtk_color_button_get_checkered ();

      cairo_mask (cr, checkered);

      cairo_pattern_destroy (checkered);

    }

  cairo_destroy (cr);

  return FALSE;

}

static void

gtk_color_button_state_changed (GtkWidget   *widget, 

                                GtkStateType previous_state)

{

  gtk_widget_queue_draw (widget);

}

static void

gtk_color_button_drag_data_received (GtkWidget        *widget,

				     GdkDragContext   *context,

				     gint              x,

				     gint              y,

				     GtkSelectionData *selection_data,

				     guint             info,

				     guint32           time,

				     GtkColorButton   *color_button)

{

  guint16 *dropped;

  if (selection_data->length < 0)

    return;

  /* We accept drops with the wrong format, since the KDE color

   * chooser incorrectly drops application/x-color with format 8.

   */

  if (selection_data->length != 8) 

    {

      g_warning (_("Received invalid color data\n"));

      return;

    }

  dropped = (guint16 *)selection_data->data;

  color_button->priv->color.red = dropped[0];

  color_button->priv->color.green = dropped[1];

  color_button->priv->color.blue = dropped[2];

  color_button->priv->alpha = dropped[3];

  gtk_widget_queue_draw (color_button->priv->draw_area);

  g_signal_emit (color_button, color_button_signals[COLOR_SET], 0);

  g_object_freeze_notify (G_OBJECT (color_button));

  g_object_notify (G_OBJECT (color_button), "color");

  g_object_notify (G_OBJECT (color_button), "alpha");

  g_object_thaw_notify (G_OBJECT (color_button));

}

static void

set_color_icon (GdkDragContext *context,

		GdkColor       *color)

{

  GdkPixbuf *pixbuf;

  guint32 pixel;

  pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE,

			   8, 48, 32);

  pixel = ((color->red & 0xff00) << 16) | 

          ((color->green & 0xff00) << 8) | 

           (color->blue & 0xff00);

  gdk_pixbuf_fill (pixbuf, pixel);

  gtk_drag_set_icon_pixbuf (context, pixbuf, -2, -2);

  g_object_unref (pixbuf);

}

static void

gtk_color_button_drag_begin (GtkWidget      *widget,

			     GdkDragContext *context,

			     gpointer        data)

{

  GtkColorButton *color_button = data;

  set_color_icon (context, &color_button->priv->color);

}

static void

gtk_color_button_drag_data_get (GtkWidget        *widget,

				GdkDragContext   *context,

				GtkSelectionData *selection_data,

				guint             info,

				guint             time,

				GtkColorButton   *color_button)

{

  guint16 dropped[4];

  dropped[0] = color_button->priv->color.red;

  dropped[1] = color_button->priv->color.green;

  dropped[2] = color_button->priv->color.blue;

  dropped[3] = color_button->priv->alpha;

  gtk_selection_data_set (selection_data, selection_data->target,

			  16, (guchar *)dropped, 8);

}

static void

gtk_color_button_init (GtkColorButton *color_button)

{

  GtkWidget *alignment;

  GtkWidget *frame;

  PangoLayout *layout;

  PangoRectangle rect;

  /* Create the widgets */

  color_button->priv = GTK_COLOR_BUTTON_GET_PRIVATE (color_button);

  gtk_widget_push_composite_child ();

  alignment = gtk_alignment_new (0.5, 0.5, 0.5, 1.0);

  gtk_container_set_border_width (GTK_CONTAINER (alignment), 1);

  gtk_container_add (GTK_CONTAINER (color_button), alignment);

  gtk_widget_show (alignment);

  frame = gtk_frame_new (NULL);

  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_OUT);

  gtk_container_add (GTK_CONTAINER (alignment), frame);

  gtk_widget_show (frame);

  /* Just some widget we can hook to expose-event on */

  color_button->priv->draw_area = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);

  layout = gtk_widget_create_pango_layout (GTK_WIDGET (color_button), "Black");

  pango_layout_get_pixel_extents (layout, NULL, &rect);

  g_object_unref (layout);

  gtk_widget_set_size_request (color_button->priv->draw_area, rect.width - 2, rect.height - 2);

  g_signal_connect (color_button->priv->draw_area, "expose-event",

                    G_CALLBACK (expose_event), color_button);

  gtk_container_add (GTK_CONTAINER (frame), color_button->priv->draw_area);

  gtk_widget_show (color_button->priv->draw_area);

  color_button->priv->title = g_strdup (_("Pick a Color")); /* default title */

  /* Start with opaque black, alpha disabled */

  color_button->priv->color.red = 0;

  color_button->priv->color.green = 0;

  color_button->priv->color.blue = 0;

  color_button->priv->alpha = 65535;

  color_button->priv->use_alpha = FALSE;

  gtk_drag_dest_set (GTK_WIDGET (color_button),

                     GTK_DEST_DEFAULT_MOTION |

                     GTK_DEST_DEFAULT_HIGHLIGHT |

                     GTK_DEST_DEFAULT_DROP,

                     drop_types, 1, GDK_ACTION_COPY);

  gtk_drag_source_set (GTK_WIDGET(color_button),

                       GDK_BUTTON1_MASK|GDK_BUTTON3_MASK,

                       drop_types, 1,

                       GDK_ACTION_COPY);

  g_signal_connect (color_button, "drag-begin",

		    G_CALLBACK (gtk_color_button_drag_begin), color_button);

  g_signal_connect (color_button, "drag-data-received",

                    G_CALLBACK (gtk_color_button_drag_data_received), color_button);

  g_signal_connect (color_button, "drag-data-get",

                    G_CALLBACK (gtk_color_button_drag_data_get), color_button);

  gtk_widget_pop_composite_child ();

}

static void

gtk_color_button_finalize (GObject *object)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (object);

  if (color_button->priv->cs_dialog != NULL)

    gtk_widget_destroy (color_button->priv->cs_dialog);

  color_button->priv->cs_dialog = NULL;

  g_free (color_button->priv->title);

  color_button->priv->title = NULL;

  G_OBJECT_CLASS (gtk_color_button_parent_class)->finalize (object);

}

/**

 * gtk_color_button_new:

 *

 * Creates a new color button. This returns a widget in the form of

 * a small button containing a swatch representing the current selected 

 * color. When the button is clicked, a color-selection dialog will open, 

 * allowing the user to select a color. The swatch will be updated to reflect 

 * the new color when the user finishes.

 *

 * Returns: a new color button.

 *

 * Since: 2.4

 */

GtkWidget *

gtk_color_button_new (void)

{

  return g_object_new (GTK_TYPE_COLOR_BUTTON, NULL);

}

/**

 * gtk_color_button_new_with_color:

 * @color: A #GdkColor to set the current color with.

 *

 * Creates a new color button. 

 *

 * Returns: a new color button.

 *

 * Since: 2.4

 */

GtkWidget *

gtk_color_button_new_with_color (const GdkColor *color)

{

  return g_object_new (GTK_TYPE_COLOR_BUTTON, "color", color, NULL);

}

static void

dialog_ok_clicked (GtkWidget *widget, 

		   gpointer   data)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (data);

  GtkColorSelection *color_selection;

  color_selection = GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog)->colorsel);

  gtk_color_selection_get_current_color (color_selection, &color_button->priv->color);

  color_button->priv->alpha = gtk_color_selection_get_current_alpha (color_selection);

  gtk_widget_hide (color_button->priv->cs_dialog);

  gtk_widget_queue_draw (color_button->priv->draw_area);

  g_signal_emit (color_button, color_button_signals[COLOR_SET], 0);

  g_object_freeze_notify (G_OBJECT (color_button));

  g_object_notify (G_OBJECT (color_button), "color");

  g_object_notify (G_OBJECT (color_button), "alpha");

  g_object_thaw_notify (G_OBJECT (color_button));

}

static gboolean

dialog_destroy (GtkWidget *widget, 

		gpointer   data)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (data);

  color_button->priv->cs_dialog = NULL;

  return FALSE;

}

static void

dialog_cancel_clicked (GtkWidget *widget,

		       gpointer   data)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (data);

  gtk_widget_hide (color_button->priv->cs_dialog);  

}

static void

gtk_color_button_clicked (GtkButton *button)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (button);

  GtkColorSelectionDialog *color_dialog;

  /* if dialog already exists, make sure it's shown and raised */

  if (!color_button->priv->cs_dialog) 

    {

      /* Create the dialog and connects its buttons */

      GtkWidget *parent;

      parent = gtk_widget_get_toplevel (GTK_WIDGET (color_button));

      color_button->priv->cs_dialog = gtk_color_selection_dialog_new (color_button->priv->title);

      color_dialog = GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog);

      if (gtk_widget_is_toplevel (parent) && GTK_IS_WINDOW (parent))

        {

          if (GTK_WINDOW (parent) != gtk_window_get_transient_for (GTK_WINDOW (color_dialog)))

 	    gtk_window_set_transient_for (GTK_WINDOW (color_dialog), GTK_WINDOW (parent));

	  gtk_window_set_modal (GTK_WINDOW (color_dialog),

				gtk_window_get_modal (GTK_WINDOW (parent)));

	}

      g_signal_connect (color_dialog->ok_button, "clicked",

                        G_CALLBACK (dialog_ok_clicked), color_button);

      g_signal_connect (color_dialog->cancel_button, "clicked",

			G_CALLBACK (dialog_cancel_clicked), color_button);

      g_signal_connect (color_dialog, "destroy",

                        G_CALLBACK (dialog_destroy), color_button);

    }

  color_dialog = GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog);

  gtk_color_selection_set_has_opacity_control (GTK_COLOR_SELECTION (color_dialog->colorsel),

                                               color_button->priv->use_alpha);

  gtk_color_selection_set_previous_color (GTK_COLOR_SELECTION (color_dialog->colorsel), 

					  &color_button->priv->color);

  gtk_color_selection_set_previous_alpha (GTK_COLOR_SELECTION (color_dialog->colorsel), 

					  color_button->priv->alpha);

  gtk_color_selection_set_current_color (GTK_COLOR_SELECTION (color_dialog->colorsel), 

					 &color_button->priv->color);

  gtk_color_selection_set_current_alpha (GTK_COLOR_SELECTION (color_dialog->colorsel), 

					 color_button->priv->alpha);

  gtk_window_present (GTK_WINDOW (color_button->priv->cs_dialog));

}

/**

 * gtk_color_button_set_color:

 * @color_button: a #GtkColorButton.

 * @color: A #GdkColor to set the current color with.

 *

 * Sets the current color to be @color.

 *

 * Since: 2.4

 **/

void

gtk_color_button_set_color (GtkColorButton *color_button,

			    const GdkColor *color)

{

  g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));

  g_return_if_fail (color != NULL);

  color_button->priv->color.red = color->red;

  color_button->priv->color.green = color->green;

  color_button->priv->color.blue = color->blue;

  gtk_widget_queue_draw (color_button->priv->draw_area);

  g_object_notify (G_OBJECT (color_button), "color");

}

/**

 * gtk_color_button_set_alpha:

 * @color_button: a #GtkColorButton.

 * @alpha: an integer between 0 and 65535.

 *

 * Sets the current opacity to be @alpha. 

 *

 * Since: 2.4

 **/

void

gtk_color_button_set_alpha (GtkColorButton *color_button,

			    guint16         alpha)

{

  g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));

  color_button->priv->alpha = alpha;

  gtk_widget_queue_draw (color_button->priv->draw_area);

  g_object_notify (G_OBJECT (color_button), "alpha");

}

/**

 * gtk_color_button_get_color:

 * @color_button: a #GtkColorButton.

 * @color: (out): a #GdkColor to fill in with the current color.

 *

 * Sets @color to be the current color in the #GtkColorButton widget.

 *

 * Since: 2.4

 **/

void

gtk_color_button_get_color (GtkColorButton *color_button,

			    GdkColor       *color)

{

  g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));

  color->red = color_button->priv->color.red;

  color->green = color_button->priv->color.green;

  color->blue = color_button->priv->color.blue;

}

/**

 * gtk_color_button_get_alpha:

 * @color_button: a #GtkColorButton.

 *

 * Returns the current alpha value. 

 *

 * Return value: an integer between 0 and 65535.

 *

 * Since: 2.4

 **/

guint16

gtk_color_button_get_alpha (GtkColorButton *color_button)

{

  g_return_val_if_fail (GTK_IS_COLOR_BUTTON (color_button), 0);

  return color_button->priv->alpha;

}

/**

 * gtk_color_button_set_use_alpha:

 * @color_button: a #GtkColorButton.

 * @use_alpha: %TRUE if color button should use alpha channel, %FALSE if not.

 *

 * Sets whether or not the color button should use the alpha channel.

 *

 * Since: 2.4

 */

void

gtk_color_button_set_use_alpha (GtkColorButton *color_button, 

				gboolean        use_alpha)

{

  g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));

  use_alpha = (use_alpha != FALSE);

  if (color_button->priv->use_alpha != use_alpha) 

    {

      color_button->priv->use_alpha = use_alpha;

      gtk_widget_queue_draw (color_button->priv->draw_area);

      g_object_notify (G_OBJECT (color_button), "use-alpha");

    }

}

/**

 * gtk_color_button_get_use_alpha:

 * @color_button: a #GtkColorButton.

 *

 * Does the color selection dialog use the alpha channel?

 *

 * Returns: %TRUE if the color sample uses alpha channel, %FALSE if not.

 *

 * Since: 2.4

 */

gboolean

gtk_color_button_get_use_alpha (GtkColorButton *color_button)

{

  g_return_val_if_fail (GTK_IS_COLOR_BUTTON (color_button), FALSE);

  return color_button->priv->use_alpha;

}

/**

 * gtk_color_button_set_title:

 * @color_button: a #GtkColorButton

 * @title: String containing new window title.

 *

 * Sets the title for the color selection dialog.

 *

 * Since: 2.4

 */

void

gtk_color_button_set_title (GtkColorButton *color_button, 

			    const gchar    *title)

{

  gchar *old_title;

  g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));

  old_title = color_button->priv->title;

  color_button->priv->title = g_strdup (title);

  g_free (old_title);

  if (color_button->priv->cs_dialog)

    gtk_window_set_title (GTK_WINDOW (color_button->priv->cs_dialog), 

			  color_button->priv->title);

  g_object_notify (G_OBJECT (color_button), "title");

}

/**

 * gtk_color_button_get_title:

 * @color_button: a #GtkColorButton

 *

 * Gets the title of the color selection dialog.

 *

 * Returns: An internal string, do not free the return value

 *

 * Since: 2.4

 */

const gchar *

gtk_color_button_get_title (GtkColorButton *color_button)

{

  g_return_val_if_fail (GTK_IS_COLOR_BUTTON (color_button), NULL);

  return color_button->priv->title;

}

static void

gtk_color_button_set_property (GObject      *object,

			       guint         param_id,

			       const GValue *value,

			       GParamSpec   *pspec)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (object);

  switch (param_id) 

    {

    case PROP_USE_ALPHA:

      gtk_color_button_set_use_alpha (color_button, g_value_get_boolean (value));

      break;

    case PROP_TITLE:

      gtk_color_button_set_title (color_button, g_value_get_string (value));

      break;

    case PROP_COLOR:

      gtk_color_button_set_color (color_button, g_value_get_boxed (value));

      break;

    case PROP_ALPHA:

      gtk_color_button_set_alpha (color_button, g_value_get_uint (value));

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);

      break;

    }

}

static void

gtk_color_button_get_property (GObject    *object,

			       guint       param_id,

			       GValue     *value,

			       GParamSpec *pspec)

{

  GtkColorButton *color_button = GTK_COLOR_BUTTON (object);

  GdkColor color;

  switch (param_id) 

    {

    case PROP_USE_ALPHA:

      g_value_set_boolean (value, gtk_color_button_get_use_alpha (color_button));

      break;

    case PROP_TITLE:

      g_value_set_string (value, gtk_color_button_get_title (color_button));

      break;

    case PROP_COLOR:

      gtk_color_button_get_color (color_button, &color;;

      g_value_set_boxed (value, &color;;

      break;

    case PROP_ALPHA:

      g_value_set_uint (value, gtk_color_button_get_alpha (color_button));

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);

      break;

    }

}

#define __GTK_COLOR_BUTTON_C__

#include "gtkaliasdef.c"