/* * 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 * * 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 "private.h" #include "mate-colorbutton.h" #include "mate-colorsel.h" #include "mate-colorseldialog.h" #include #include #include #include /* 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 MATE_COLOR_BUTTON_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), MATE_TYPE_COLOR_BUTTON, MateColorButtonPrivate)) struct _MateColorButtonPrivate { 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 mate_color_button_finalize (GObject *object); static void mate_color_button_set_property (GObject *object, guint param_id, const GValue *value, GParamSpec *pspec); static void mate_color_button_get_property (GObject *object, guint param_id, GValue *value, GParamSpec *pspec); /* gtkwidget signals */ static void mate_color_button_state_changed (GtkWidget *widget, GtkStateType previous_state); /* gtkbutton signals */ static void mate_color_button_clicked (GtkButton *button); /* source side drag signals */ static void mate_color_button_drag_begin (GtkWidget *widget, GdkDragContext *context, gpointer data); static void mate_color_button_drag_data_get (GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection_data, guint info, guint time, MateColorButton *color_button); /* target side drag signals */ static void mate_color_button_drag_data_received (GtkWidget *widget, GdkDragContext *context, gint x, gint y, GtkSelectionData *selection_data, guint info, guint32 time, MateColorButton *color_button); static guint color_button_signals[LAST_SIGNAL] = { 0 }; static const GtkTargetEntry drop_types[] = { { "application/x-color", 0, 0 } }; G_DEFINE_TYPE (MateColorButton, mate_color_button, GTK_TYPE_BUTTON) static void mate_color_button_class_init (MateColorButtonClass *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 = mate_color_button_get_property; gobject_class->set_property = mate_color_button_set_property; gobject_class->finalize = mate_color_button_finalize; widget_class->state_changed = mate_color_button_state_changed; button_class->clicked = mate_color_button_clicked; klass->color_set = NULL; /** * MateColorButton: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: 1.9.1 */ g_object_class_install_property (gobject_class, PROP_USE_ALPHA, g_param_spec_boolean ("use-alpha", _("Use alpha"), _("Whether or not to give the color an alpha value"), FALSE, G_PARAM_READWRITE)); /** * MateColorButton:title: * * The title of the color selection dialog * * Since: 1.9.1 */ g_object_class_install_property (gobject_class, PROP_TITLE, g_param_spec_string ("title", _("Title"), _("The title of the color selection dialog"), _("Pick a Color"), G_PARAM_READWRITE)); /** * MateColorButton:color: * * The selected color. * * Since: 1.9.1 */ g_object_class_install_property (gobject_class, PROP_COLOR, g_param_spec_boxed ("color", _("Current Color"), _("The selected color"), GDK_TYPE_COLOR, G_PARAM_READWRITE)); /** * MateColorButton:alpha: * * The selected opacity value (0 fully transparent, 65535 fully opaque). * * Since: 1.9.1 */ g_object_class_install_property (gobject_class, PROP_ALPHA, g_param_spec_uint ("alpha", _("Current Alpha"), _("The selected opacity value (0 fully transparent, 65535 fully opaque)"), 0, 65535, 65535, G_PARAM_READWRITE)); /** * MateColorButton::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 mate_color_button_get_color() and * mate_color_button_get_alpha() to find out which color was just selected. * * Note that this signal is only emitted when the user * changes the color. If you need to react to programmatic color changes * as well, use the notify::color signal. * * Since: 1.9.1 */ color_button_signals[COLOR_SET] = g_signal_new ("color-set", G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (MateColorButtonClass, color_set), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); g_type_class_add_private (gobject_class, sizeof (MateColorButtonPrivate)); } static gboolean mate_color_button_has_alpha (MateColorButton *color_button) { return color_button->priv->use_alpha && color_button->priv->alpha < 65535; } static cairo_pattern_t * mate_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 gboolean draw (GtkWidget *widget, cairo_t *cr, gpointer data) { MateColorButton *color_button = MATE_COLOR_BUTTON (data); cairo_pattern_t *checkered; if (mate_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 = mate_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, >k_widget_get_style (GTK_WIDGET(color_button))->bg[GTK_STATE_INSENSITIVE]); checkered = mate_color_button_get_checkered (); cairo_mask (cr, checkered); cairo_pattern_destroy (checkered); } return FALSE; } static void mate_color_button_state_changed (GtkWidget *widget, GtkStateType previous_state) { gtk_widget_queue_draw (widget); } static void mate_color_button_drag_data_received (GtkWidget *widget, GdkDragContext *context, gint x, gint y, GtkSelectionData *selection_data, guint info, guint32 time, MateColorButton *color_button) { guint16 *dropped; if (gtk_selection_data_get_length (selection_data) < 0) return; /* We accept drops with the wrong format, since the KDE color * chooser incorrectly drops application/x-color with format 8. */ if (gtk_selection_data_get_length (selection_data) != 8) { g_warning (_("Received invalid color data\n")); return; } dropped = (guint16 *)gtk_selection_data_get_data (selection_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 mate_color_button_drag_begin (GtkWidget *widget, GdkDragContext *context, gpointer data) { MateColorButton *color_button = data; set_color_icon (context, &color_button->priv->color); } static void mate_color_button_drag_data_get (GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection_data, guint info, guint time, MateColorButton *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, gtk_selection_data_get_target (selection_data), 16, (guchar *)dropped, 8); } static void mate_color_button_init (MateColorButton *color_button) { GtkWidget *alignment; GtkWidget *frame; PangoLayout *layout; PangoRectangle rect; _mate_desktop_init_i18n (); /* Create the widgets */ color_button->priv = MATE_COLOR_BUTTON_GET_PRIVATE (color_button); 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, "draw", G_CALLBACK (draw), 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 (mate_color_button_drag_begin), color_button); g_signal_connect (color_button, "drag-data-received", G_CALLBACK (mate_color_button_drag_data_received), color_button); g_signal_connect (color_button, "drag-data-get", G_CALLBACK (mate_color_button_drag_data_get), color_button); } static void mate_color_button_finalize (GObject *object) { MateColorButton *color_button = MATE_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 (mate_color_button_parent_class)->finalize (object); } /** * mate_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: 1.9.1 */ GtkWidget * mate_color_button_new (void) { return g_object_new (MATE_TYPE_COLOR_BUTTON, NULL); } /** * mate_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: 1.9.1 */ GtkWidget * mate_color_button_new_with_color (const GdkColor *color) { return g_object_new (MATE_TYPE_COLOR_BUTTON, "color", color, NULL); } static void dialog_ok_clicked (GtkWidget *widget, gpointer data) { MateColorButton *color_button = MATE_COLOR_BUTTON (data); MateColorSelection *color_selection; color_selection = MATE_COLOR_SELECTION (MATE_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog)->colorsel); mate_color_selection_get_current_color (color_selection, &color_button->priv->color); color_button->priv->alpha = mate_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) { MateColorButton *color_button = MATE_COLOR_BUTTON (data); color_button->priv->cs_dialog = NULL; return FALSE; } static void dialog_cancel_clicked (GtkWidget *widget, gpointer data) { MateColorButton *color_button = MATE_COLOR_BUTTON (data); gtk_widget_hide (color_button->priv->cs_dialog); } static void mate_color_button_clicked (GtkButton *button) { MateColorButton *color_button = MATE_COLOR_BUTTON (button); MateColorSelectionDialog *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 = mate_color_selection_dialog_new (color_button->priv->title); color_dialog = MATE_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 = MATE_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog); mate_color_selection_set_has_opacity_control (MATE_COLOR_SELECTION (color_dialog->colorsel), color_button->priv->use_alpha); mate_color_selection_set_has_palette (MATE_COLOR_SELECTION (color_dialog->colorsel), TRUE); mate_color_selection_set_previous_color (MATE_COLOR_SELECTION (color_dialog->colorsel), &color_button->priv->color); mate_color_selection_set_previous_alpha (MATE_COLOR_SELECTION (color_dialog->colorsel), color_button->priv->alpha); mate_color_selection_set_current_color (MATE_COLOR_SELECTION (color_dialog->colorsel), &color_button->priv->color); mate_color_selection_set_current_alpha (MATE_COLOR_SELECTION (color_dialog->colorsel), color_button->priv->alpha); gtk_window_present (GTK_WINDOW (color_button->priv->cs_dialog)); } /** * mate_color_button_set_color: * @color_button: a #MateColorButton. * @color: A #GdkColor to set the current color with. * * Sets the current color to be @color. * * Since: 1.9.1 **/ void mate_color_button_set_color (MateColorButton *color_button, const GdkColor *color) { g_return_if_fail (MATE_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"); } /** * mate_color_button_set_rgba: * @color_button: a #MateColorButton. * @color: A #GdkRGBA to set the current color with. * * Sets the current color to be @color. * * Since: 1.9.1 **/ void mate_color_button_set_rgba (MateColorButton *color_button, const GdkRGBA *color) { g_return_if_fail (MATE_IS_COLOR_BUTTON (color_button)); g_return_if_fail (color != NULL); color_button->priv->color.red = color->red * 65535; color_button->priv->color.green = color->green * 65535; color_button->priv->color.blue = color->blue * 65535; color_button->priv->alpha = color->alpha * 65535; gtk_widget_queue_draw (color_button->priv->draw_area); g_object_notify (G_OBJECT (color_button), "color"); } /** * mate_color_button_set_alpha: * @color_button: a #MateColorButton. * @alpha: an integer between 0 and 65535. * * Sets the current opacity to be @alpha. * * Since: 1.9.1 **/ void mate_color_button_set_alpha (MateColorButton *color_button, guint16 alpha) { g_return_if_fail (MATE_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"); } /** * mate_color_button_get_color: * @color_button: a #MateColorButton. * @color: a #GdkColor to fill in with the current color. * * Sets @color to be the current color in the #MateColorButton widget. * * Since: 1.9.1 **/ void mate_color_button_get_color (MateColorButton *color_button, GdkColor *color) { g_return_if_fail (MATE_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; } /** * mate_color_button_get_rgba: * @color_button: a #MateColorButton. * @color: a #GdkRGBA to fill in with the current color. * * Sets @color to be the current color in the #MateColorButton widget. * * Since: 1.9.1 **/ void mate_color_button_get_rgba (MateColorButton *color_button, GdkRGBA *color) { g_return_if_fail (MATE_IS_COLOR_BUTTON (color_button)); color->red = color_button->priv->color.red / 65535.; color->green = color_button->priv->color.green / 65535.; color->blue = color_button->priv->color.blue / 65535.; color->alpha = color_button->priv->alpha / 65535.; } /** * mate_color_button_get_alpha: * @color_button: a #MateColorButton. * * Returns the current alpha value. * * Return value: an integer between 0 and 65535. * * Since: 1.9.1 **/ guint16 mate_color_button_get_alpha (MateColorButton *color_button) { g_return_val_if_fail (MATE_IS_COLOR_BUTTON (color_button), 0); return color_button->priv->alpha; } /** * mate_color_button_set_use_alpha: * @color_button: a #MateColorButton. * @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: 1.9.1 */ void mate_color_button_set_use_alpha (MateColorButton *color_button, gboolean use_alpha) { g_return_if_fail (MATE_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"); } } /** * mate_color_button_get_use_alpha: * @color_button: a #MateColorButton. * * Does the color selection dialog use the alpha channel? * * Returns: %TRUE if the color sample uses alpha channel, %FALSE if not. * * Since: 1.9.1 */ gboolean mate_color_button_get_use_alpha (MateColorButton *color_button) { g_return_val_if_fail (MATE_IS_COLOR_BUTTON (color_button), FALSE); return color_button->priv->use_alpha; } /** * mate_color_button_set_title: * @color_button: a #MateColorButton * @title: String containing new window title. * * Sets the title for the color selection dialog. * * Since: 1.9.1 */ void mate_color_button_set_title (MateColorButton *color_button, const gchar *title) { gchar *old_title; g_return_if_fail (MATE_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"); } /** * mate_color_button_get_title: * @color_button: a #MateColorButton * * Gets the title of the color selection dialog. * * Returns: An internal string, do not free the return value * * Since: 1.9.1 */ const gchar * mate_color_button_get_title (MateColorButton *color_button) { g_return_val_if_fail (MATE_IS_COLOR_BUTTON (color_button), NULL); return color_button->priv->title; } static void mate_color_button_set_property (GObject *object, guint param_id, const GValue *value, GParamSpec *pspec) { MateColorButton *color_button = MATE_COLOR_BUTTON (object); switch (param_id) { case PROP_USE_ALPHA: mate_color_button_set_use_alpha (color_button, g_value_get_boolean (value)); break; case PROP_TITLE: mate_color_button_set_title (color_button, g_value_get_string (value)); break; case PROP_COLOR: mate_color_button_set_color (color_button, g_value_get_boxed (value)); break; case PROP_ALPHA: mate_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 mate_color_button_get_property (GObject *object, guint param_id, GValue *value, GParamSpec *pspec) { MateColorButton *color_button = MATE_COLOR_BUTTON (object); GdkColor color; switch (param_id) { case PROP_USE_ALPHA: g_value_set_boolean (value, mate_color_button_get_use_alpha (color_button)); break; case PROP_TITLE: g_value_set_string (value, mate_color_button_get_title (color_button)); break; case PROP_COLOR: mate_color_button_get_color (color_button, &color); g_value_set_boxed (value, &color); break; case PROP_ALPHA: g_value_set_uint (value, mate_color_button_get_alpha (color_button)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); break; } }