forked from AuroraMiddleware/gtk
669 lines
21 KiB
C
669 lines
21 KiB
C
/*
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* GTK - The GIMP Toolkit
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* Copyright (C) 1998, 1999 Red Hat, Inc.
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* All rights reserved.
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*
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* This Library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Color picker button for GNOME
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*
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* Author: Federico Mena <federico@nuclecu.unam.mx>
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*
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* Modified by the GTK+ Team and others 2003. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gtkcolorbutton.h"
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#include "gtkbinlayout.h"
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#include "gtkbutton.h"
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#include "gtkcolorchooser.h"
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#include "gtkcolorchooserprivate.h"
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#include "gtkcolorchooserdialog.h"
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#include "gtkcolorswatchprivate.h"
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#include "gtkdnd.h"
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#include "gtkdragdest.h"
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#include "gtkdragsource.h"
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#include "gtkintl.h"
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#include "gtkmain.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtksnapshot.h"
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#include "gtkstylecontext.h"
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#include "gtkdragsource.h"
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#include "gtkdragdest.h"
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/**
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* SECTION:gtkcolorbutton
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* @Short_description: A button to launch a color selection dialog
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* @Title: GtkColorButton
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* @See_also: #GtkFontButton
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*
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* The #GtkColorButton is a button which displays the currently selected
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* color and allows to open a color selection dialog to change the color.
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* It is suitable widget for selecting a color in a preference dialog.
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*
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* # CSS nodes
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*
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* GtkColorButton has a single CSS node with name button. To differentiate
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* it from a plain #GtkButton, it gets the .color style class.
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*/
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typedef struct _GtkColorButtonClass GtkColorButtonClass;
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struct _GtkColorButton {
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GtkWidget parent_instance;
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};
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struct _GtkColorButtonClass {
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GtkWidgetClass parent_class;
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void (* color_set) (GtkColorButton *cp);
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};
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typedef struct
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{
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GtkWidget *button;
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GtkWidget *swatch; /* Widget where we draw the color sample */
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GtkWidget *cs_dialog; /* Color selection dialog */
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gchar *title; /* Title for the color selection window */
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GdkRGBA rgba;
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guint use_alpha : 1; /* Use alpha or not */
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guint show_editor : 1;
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} GtkColorButtonPrivate;
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/* Properties */
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enum
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{
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PROP_0,
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PROP_USE_ALPHA,
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PROP_TITLE,
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PROP_RGBA,
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PROP_SHOW_EDITOR
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};
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/* Signals */
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enum
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{
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COLOR_SET,
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LAST_SIGNAL
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};
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/* gobject signals */
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static void gtk_color_button_finalize (GObject *object);
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static void gtk_color_button_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_color_button_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec);
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/* gtkbutton signals */
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static void gtk_color_button_clicked (GtkButton *button,
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gpointer user_data);
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static guint color_button_signals[LAST_SIGNAL] = { 0 };
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static const char *drop_types[] = { "application/x-color" };
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static void gtk_color_button_iface_init (GtkColorChooserInterface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkColorButton, gtk_color_button, GTK_TYPE_WIDGET,
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G_ADD_PRIVATE (GtkColorButton)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_COLOR_CHOOSER,
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gtk_color_button_iface_init))
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static void
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gtk_color_button_class_init (GtkColorButtonClass *klass)
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{
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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gobject_class = G_OBJECT_CLASS (klass);
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widget_class = GTK_WIDGET_CLASS (klass);
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gobject_class->get_property = gtk_color_button_get_property;
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gobject_class->set_property = gtk_color_button_set_property;
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gobject_class->finalize = gtk_color_button_finalize;
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klass->color_set = NULL;
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/**
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* GtkColorButton:use-alpha:
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*
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* If this property is set to %TRUE, the color swatch on the button is
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* rendered against a checkerboard background to show its opacity and
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* the opacity slider is displayed in the color selection dialog.
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*/
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g_object_class_install_property (gobject_class,
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PROP_USE_ALPHA,
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g_param_spec_boolean ("use-alpha", P_("Use alpha"),
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P_("Whether to give the color an alpha value"),
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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/**
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* GtkColorButton:title:
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*
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* The title of the color selection dialog
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*/
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g_object_class_install_property (gobject_class,
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PROP_TITLE,
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g_param_spec_string ("title",
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P_("Title"),
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P_("The title of the color selection dialog"),
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_("Pick a Color"),
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GTK_PARAM_READWRITE));
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/**
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* GtkColorButton:rgba:
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*
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* The RGBA color.
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*/
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g_object_class_install_property (gobject_class,
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PROP_RGBA,
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g_param_spec_boxed ("rgba",
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P_("Current RGBA Color"),
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P_("The selected RGBA color"),
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GDK_TYPE_RGBA,
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GTK_PARAM_READWRITE));
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/**
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* GtkColorButton::color-set:
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* @widget: the object which received the signal.
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*
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* The ::color-set signal is emitted when the user selects a color.
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* When handling this signal, use gtk_color_chooser_get_rgba() to
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* find out which color was just selected.
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*
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* Note that this signal is only emitted when the user
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* changes the color. If you need to react to programmatic color changes
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* as well, use the notify::color signal.
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*/
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color_button_signals[COLOR_SET] = g_signal_new (I_("color-set"),
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G_TYPE_FROM_CLASS (gobject_class),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GtkColorButtonClass, color_set),
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NULL, NULL,
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NULL,
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G_TYPE_NONE, 0);
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/**
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* GtkColorButton:show-editor:
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*
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* Set this property to %TRUE to skip the palette
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* in the dialog and go directly to the color editor.
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*
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* This property should be used in cases where the palette
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* in the editor would be redundant, such as when the color
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* button is already part of a palette.
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*/
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g_object_class_install_property (gobject_class,
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PROP_SHOW_EDITOR,
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g_param_spec_boolean ("show-editor", P_("Show Editor"),
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P_("Whether to show the color editor right away"),
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
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}
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static void
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got_color (GObject *source,
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GAsyncResult *result,
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gpointer data)
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{
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GdkDrop *drop = GDK_DROP (source);
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const GValue *value;
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value = gdk_drop_read_value_finish (drop, result, NULL);
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if (value)
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{
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GdkRGBA *color = g_value_get_boxed (value);
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gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (data), color);
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gdk_drop_finish (drop, GDK_ACTION_COPY);
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}
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else
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gdk_drop_finish (drop, 0);
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}
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static gboolean
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gtk_color_button_drag_drop (GtkDropTarget *dest,
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int x,
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int y,
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GtkColorButton *button)
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{
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GdkDrop *drop = gtk_drop_target_get_drop (dest);
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if (gdk_drop_has_value (drop, GDK_TYPE_RGBA))
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{
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gdk_drop_read_value_async (drop, GDK_TYPE_RGBA, G_PRIORITY_DEFAULT, NULL, got_color, button);
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return TRUE;
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}
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return FALSE;
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}
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static void
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gtk_color_button_drag_begin (GtkDragSource *source,
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GtkColorButton *button)
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{
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
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GtkSnapshot *snapshot;
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GdkPaintable *paintable;
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snapshot = gtk_snapshot_new ();
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gtk_snapshot_append_color (snapshot, &priv->rgba, &GRAPHENE_RECT_INIT(0, 0, 48, 32));
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paintable = gtk_snapshot_free_to_paintable (snapshot, NULL);
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gtk_drag_source_set_icon (source, paintable, 0, 0);
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g_object_unref (paintable);
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}
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static void
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get_rgba_value (GValue *value,
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gpointer data)
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{
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (GTK_COLOR_BUTTON (data));
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g_value_set_boxed (value, &priv->rgba);
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}
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static void
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gtk_color_button_init (GtkColorButton *button)
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{
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
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PangoLayout *layout;
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PangoRectangle rect;
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GtkStyleContext *context;
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GdkContentFormats *targets;
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GdkContentProvider *content;
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GtkDragSource *source;
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GtkDropTarget *dest;
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priv->button = gtk_button_new ();
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g_signal_connect (priv->button, "clicked", G_CALLBACK (gtk_color_button_clicked), button);
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gtk_widget_set_parent (priv->button, GTK_WIDGET (button));
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priv->swatch = gtk_color_swatch_new ();
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layout = gtk_widget_create_pango_layout (GTK_WIDGET (button), "Black");
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pango_layout_get_pixel_extents (layout, NULL, &rect);
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g_object_unref (layout);
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gtk_widget_set_size_request (priv->swatch, rect.width, rect.height);
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gtk_container_add (GTK_CONTAINER (priv->button), priv->swatch);
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priv->title = g_strdup (_("Pick a Color")); /* default title */
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/* Start with opaque black, alpha disabled */
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priv->rgba.red = 0;
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priv->rgba.green = 0;
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priv->rgba.blue = 0;
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priv->rgba.alpha = 1;
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priv->use_alpha = FALSE;
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targets = gdk_content_formats_new (drop_types, G_N_ELEMENTS (drop_types));
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dest = gtk_drop_target_new (GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_HIGHLIGHT, targets, GDK_ACTION_COPY);
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g_signal_connect (dest, "drag-drop", G_CALLBACK (gtk_color_button_drag_drop), button);
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gtk_drop_target_attach (dest, GTK_WIDGET (button));
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gdk_content_formats_unref (targets);
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content = gdk_content_provider_new_with_callback (GDK_TYPE_RGBA, get_rgba_value, button);
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source = gtk_drag_source_new (content, GDK_ACTION_COPY);
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g_object_unref (content);
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g_signal_connect (source, "drag-begin", G_CALLBACK (gtk_color_button_drag_begin), button);
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gtk_drag_source_attach (source, priv->button, GDK_BUTTON1_MASK|GDK_BUTTON3_MASK);
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context = gtk_widget_get_style_context (GTK_WIDGET (priv->button));
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gtk_style_context_add_class (context, "color");
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}
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static void
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gtk_color_button_finalize (GObject *object)
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{
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GtkColorButton *button = GTK_COLOR_BUTTON (object);
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
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if (priv->cs_dialog != NULL)
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gtk_widget_destroy (priv->cs_dialog);
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g_free (priv->title);
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gtk_widget_unparent (priv->button);
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G_OBJECT_CLASS (gtk_color_button_parent_class)->finalize (object);
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}
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/**
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* gtk_color_button_new:
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*
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* Creates a new color button.
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*
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* This returns a widget in the form of a small button containing
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* a swatch representing the current selected color. When the button
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* is clicked, a color-selection dialog will open, allowing the user
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* to select a color. The swatch will be updated to reflect the new
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* color when the user finishes.
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*
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* Returns: a new color button
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*/
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GtkWidget *
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gtk_color_button_new (void)
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{
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return g_object_new (GTK_TYPE_COLOR_BUTTON, NULL);
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}
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/**
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* gtk_color_button_new_with_rgba:
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* @rgba: A #GdkRGBA to set the current color with
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*
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* Creates a new color button.
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*
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* Returns: a new color button
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*/
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GtkWidget *
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gtk_color_button_new_with_rgba (const GdkRGBA *rgba)
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{
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return g_object_new (GTK_TYPE_COLOR_BUTTON, "rgba", rgba, NULL);
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}
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static gboolean
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dialog_destroy (GtkWidget *widget,
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gpointer data)
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{
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GtkColorButton *button = GTK_COLOR_BUTTON (data);
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
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priv->cs_dialog = NULL;
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return FALSE;
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}
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static void
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dialog_response (GtkDialog *dialog,
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gint response,
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gpointer data)
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{
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if (response == GTK_RESPONSE_CANCEL)
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gtk_widget_hide (GTK_WIDGET (dialog));
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else if (response == GTK_RESPONSE_OK)
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{
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GtkColorButton *button = GTK_COLOR_BUTTON (data);
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
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gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (dialog), &priv->rgba);
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gtk_color_swatch_set_rgba (GTK_COLOR_SWATCH (priv->swatch), &priv->rgba);
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gtk_widget_hide (GTK_WIDGET (dialog));
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g_object_ref (button);
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g_signal_emit (button, color_button_signals[COLOR_SET], 0);
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g_object_freeze_notify (G_OBJECT (button));
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g_object_notify (G_OBJECT (button), "rgba");
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g_object_thaw_notify (G_OBJECT (button));
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g_object_unref (button);
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}
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}
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/* Create the dialog and connects its buttons */
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static void
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ensure_dialog (GtkColorButton *button)
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{
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
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GtkWidget *parent, *dialog;
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if (priv->cs_dialog != NULL)
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return;
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parent = GTK_WIDGET (gtk_widget_get_root (GTK_WIDGET (button)));
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priv->cs_dialog = dialog = gtk_color_chooser_dialog_new (priv->title, NULL);
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gtk_window_set_hide_on_close (GTK_WINDOW (dialog), TRUE);
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if (GTK_IS_WINDOW (parent))
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{
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if (GTK_WINDOW (parent) != gtk_window_get_transient_for (GTK_WINDOW (dialog)))
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gtk_window_set_transient_for (GTK_WINDOW (dialog), GTK_WINDOW (parent));
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gtk_window_set_modal (GTK_WINDOW (dialog),
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gtk_window_get_modal (GTK_WINDOW (parent)));
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}
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g_signal_connect (dialog, "response",
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G_CALLBACK (dialog_response), button);
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g_signal_connect (dialog, "destroy",
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G_CALLBACK (dialog_destroy), button);
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}
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static void
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gtk_color_button_clicked (GtkButton *b,
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gpointer user_data)
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{
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GtkColorButton *button = user_data;
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
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/* if dialog already exists, make sure it's shown and raised */
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ensure_dialog (button);
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g_object_set (priv->cs_dialog, "show-editor", priv->show_editor, NULL);
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gtk_color_chooser_set_use_alpha (GTK_COLOR_CHOOSER (priv->cs_dialog), priv->use_alpha);
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gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (priv->cs_dialog), &priv->rgba);
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS
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gtk_window_present (GTK_WINDOW (priv->cs_dialog));
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G_GNUC_END_IGNORE_DEPRECATIONS
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}
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static void
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gtk_color_button_set_rgba (GtkColorChooser *chooser,
|
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const GdkRGBA *rgba)
|
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{
|
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GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (GTK_COLOR_BUTTON (chooser));
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g_return_if_fail (GTK_IS_COLOR_BUTTON (chooser));
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g_return_if_fail (rgba != NULL);
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priv->rgba = *rgba;
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gtk_color_swatch_set_rgba (GTK_COLOR_SWATCH (priv->swatch), &priv->rgba);
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g_object_notify (G_OBJECT (chooser), "rgba");
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}
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|
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static void
|
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gtk_color_button_get_rgba (GtkColorChooser *chooser,
|
|
GdkRGBA *rgba)
|
|
{
|
|
GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (GTK_COLOR_BUTTON (chooser));
|
|
|
|
g_return_if_fail (GTK_IS_COLOR_BUTTON (chooser));
|
|
g_return_if_fail (rgba != NULL);
|
|
|
|
*rgba = priv->rgba;
|
|
}
|
|
|
|
static void
|
|
set_use_alpha (GtkColorButton *button,
|
|
gboolean use_alpha)
|
|
{
|
|
GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
|
|
|
|
use_alpha = (use_alpha != FALSE);
|
|
|
|
if (priv->use_alpha != use_alpha)
|
|
{
|
|
priv->use_alpha = use_alpha;
|
|
|
|
gtk_color_swatch_set_use_alpha (GTK_COLOR_SWATCH (priv->swatch), use_alpha);
|
|
|
|
g_object_notify (G_OBJECT (button), "use-alpha");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gtk_color_button_set_title:
|
|
* @button: a #GtkColorButton
|
|
* @title: String containing new window title
|
|
*
|
|
* Sets the title for the color selection dialog.
|
|
*/
|
|
void
|
|
gtk_color_button_set_title (GtkColorButton *button,
|
|
const gchar *title)
|
|
{
|
|
GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
|
|
gchar *old_title;
|
|
|
|
g_return_if_fail (GTK_IS_COLOR_BUTTON (button));
|
|
|
|
old_title = priv->title;
|
|
priv->title = g_strdup (title);
|
|
g_free (old_title);
|
|
|
|
if (priv->cs_dialog)
|
|
gtk_window_set_title (GTK_WINDOW (priv->cs_dialog), priv->title);
|
|
|
|
g_object_notify (G_OBJECT (button), "title");
|
|
}
|
|
|
|
/**
|
|
* gtk_color_button_get_title:
|
|
* @button: a #GtkColorButton
|
|
*
|
|
* Gets the title of the color selection dialog.
|
|
*
|
|
* Returns: An internal string, do not free the return value
|
|
*/
|
|
const gchar *
|
|
gtk_color_button_get_title (GtkColorButton *button)
|
|
{
|
|
GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
|
|
|
|
g_return_val_if_fail (GTK_IS_COLOR_BUTTON (button), NULL);
|
|
|
|
return priv->title;
|
|
}
|
|
|
|
static void
|
|
gtk_color_button_set_property (GObject *object,
|
|
guint param_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GtkColorButton *button = GTK_COLOR_BUTTON (object);
|
|
GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
|
|
|
|
switch (param_id)
|
|
{
|
|
case PROP_USE_ALPHA:
|
|
set_use_alpha (button, g_value_get_boolean (value));
|
|
break;
|
|
case PROP_TITLE:
|
|
gtk_color_button_set_title (button, g_value_get_string (value));
|
|
break;
|
|
case PROP_RGBA:
|
|
gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (button), g_value_get_boxed (value));
|
|
break;
|
|
case PROP_SHOW_EDITOR:
|
|
{
|
|
gboolean show_editor = g_value_get_boolean (value);
|
|
if (priv->show_editor != show_editor)
|
|
{
|
|
priv->show_editor = show_editor;
|
|
g_object_notify (object, "show-editor");
|
|
}
|
|
}
|
|
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 *button = GTK_COLOR_BUTTON (object);
|
|
GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
|
|
|
|
switch (param_id)
|
|
{
|
|
case PROP_USE_ALPHA:
|
|
g_value_set_boolean (value, priv->use_alpha);
|
|
break;
|
|
case PROP_TITLE:
|
|
g_value_set_string (value, gtk_color_button_get_title (button));
|
|
break;
|
|
case PROP_RGBA:
|
|
{
|
|
GdkRGBA rgba;
|
|
|
|
gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (button), &rgba);
|
|
g_value_set_boxed (value, &rgba);
|
|
}
|
|
break;
|
|
case PROP_SHOW_EDITOR:
|
|
g_value_set_boolean (value, priv->show_editor);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_color_button_add_palette (GtkColorChooser *chooser,
|
|
GtkOrientation orientation,
|
|
gint colors_per_line,
|
|
gint n_colors,
|
|
GdkRGBA *colors)
|
|
{
|
|
GtkColorButton *button = GTK_COLOR_BUTTON (chooser);
|
|
GtkColorButtonPrivate *priv = gtk_color_button_get_instance_private (button);
|
|
|
|
ensure_dialog (button);
|
|
|
|
gtk_color_chooser_add_palette (GTK_COLOR_CHOOSER (priv->cs_dialog),
|
|
orientation, colors_per_line, n_colors, colors);
|
|
}
|
|
|
|
static void
|
|
gtk_color_button_iface_init (GtkColorChooserInterface *iface)
|
|
{
|
|
iface->get_rgba = gtk_color_button_get_rgba;
|
|
iface->set_rgba = gtk_color_button_set_rgba;
|
|
iface->add_palette = gtk_color_button_add_palette;
|
|
}
|
|
|