Pileus Git - ~andy/gtk/blob - gtk/gtkcolorchooser.c

   1 /* GTK - The GIMP Toolkit
   2  *
   3  * Copyright (C) 2012, Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include "gtkcolorchooser.h"
  24 #include "gtkcolorchooserprivate.h"
  25 #include "gtkintl.h"
  26 #include "gtktypebuiltins.h"
  27 #include "gtkprivate.h"
  28
  29 enum
  30 {
  31   COLOR_ACTIVATED,
  32   LAST_SIGNAL
  33 };
  34
  35 static guint signals[LAST_SIGNAL];
  36
  37 G_DEFINE_INTERFACE (GtkColorChooser, gtk_color_chooser, G_TYPE_OBJECT);
  38
  39 static void
  40 gtk_color_chooser_default_init (GtkColorChooserInterface *iface)
  41 {
  42   g_object_interface_install_property (iface,
  43       g_param_spec_boxed ("color",
  44                           P_("Color"),
  45                           P_("Current color, as a GdkRGBA"),
  46                           GDK_TYPE_RGBA,
  47                           GTK_PARAM_READWRITE));
  48
  49   g_object_interface_install_property (iface,
  50       g_param_spec_boolean ("show-alpha",
  51                             P_("Show alpha"),
  52                             P_("Whether alpha should be shown"),
  53                             TRUE,
  54                             GTK_PARAM_READWRITE));
  55   /**
  56    * GtkColorChooser::color-activated:
  57    * @self: the object which received the signal
  58    * @color: the color
  59    *
  60    * Emitted when a color is activated from the color chooser.
  61    * This usually happens when the user clicks a color swatch,
  62    * or a color is selected and the user presses one of the keys
  63    * Space, Shift+Space, Return or Enter.
  64     */
  65   signals[COLOR_ACTIVATED] =
  66     g_signal_new ("color-activated",
  67                   GTK_TYPE_COLOR_CHOOSER,
  68                   G_SIGNAL_RUN_FIRST,
  69                   G_STRUCT_OFFSET (GtkColorChooserInterface, color_activated),
  70                   NULL, NULL,
  71                   NULL,
  72                   G_TYPE_NONE,
  73                   1, G_TYPE_STRING);
  74 }
  75
  76 /**
  77  * gtk_color_chooser_get_color:
  78  * @chooser: a #GtkColorChooser
  79  * @color: return location for the color
  80  *
  81  * Gets the currently-selected color.
  82  */
  83 void
  84 gtk_color_chooser_get_color (GtkColorChooser *chooser,
  85                              GdkRGBA         *color)
  86 {
  87   g_return_if_fail (GTK_IS_COLOR_CHOOSER (chooser));
  88
  89   GTK_COLOR_CHOOSER_GET_IFACE (chooser)->get_color (chooser, color);
  90 }
  91
  92 /**
  93  * gtk_color_chooser_set_color:
  94  * @chooser: a #GtkColorChooser
  95  * @color: the new color
  96  *
  97  * Sets the currently-selected color.
  98  */
  99 void
 100 gtk_color_chooser_set_color (GtkColorChooser *chooser,
 101                              const GdkRGBA   *color)
 102 {
 103   g_return_if_fail (GTK_IS_COLOR_CHOOSER (chooser));
 104   g_return_if_fail (color != NULL);
 105
 106   GTK_COLOR_CHOOSER_GET_IFACE (chooser)->set_color (chooser, color);
 107 }
 108
 109 void
 110 _gtk_color_chooser_color_activated (GtkColorChooser *chooser,
 111                                     const GdkRGBA   *color)
 112 {
 113   g_return_if_fail (GTK_IS_COLOR_CHOOSER (chooser));
 114
 115   g_signal_emit (chooser, signals[COLOR_ACTIVATED], 0, color);
 116 }
 117
 118 gboolean
 119 gtk_color_chooser_get_show_alpha (GtkColorChooser *chooser)
 120 {
 121   gboolean show_alpha;
 122
 123   g_return_val_if_fail (GTK_IS_COLOR_CHOOSER (chooser), TRUE);
 124
 125   g_object_get (chooser, "show-alpha", &show_alpha, NULL);
 126
 127   return show_alpha;
 128 }
 129
 130 void
 131 gtk_color_chooser_set_show_alpha (GtkColorChooser *chooser,
 132                                   gboolean         show_alpha)
 133 {
 134
 135   g_return_if_fail (GTK_IS_COLOR_CHOOSER (chooser));
 136
 137   g_object_set (chooser, "show-alpha", show_alpha, NULL);
 138 }