forked from AuroraMiddleware/gtk
735 lines
22 KiB
C
735 lines
22 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 "gtkdragsource.h"
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#include "gtkdroptarget.h"
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#include <glib/gi18n-lib.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 "gtkwidgetprivate.h"
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/**
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* GtkColorButton:
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*
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* The `GtkColorButton` allows to open a color chooser dialog to change
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* the color.
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*
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* 
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*
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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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* ```
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* colorbutton
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* ╰── button.color
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* ╰── [content]
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* ```
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*
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* `GtkColorButton` has a single CSS node with name colorbutton which
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* contains a button node. To differentiate it from a plain `GtkButton`,
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* 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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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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char *title; /* Title for the color chooser dialog */
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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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guint modal : 1;
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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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void (* activate) (GtkColorButton *self);
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};
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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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PROP_MODAL
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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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ACTIVATE,
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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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static void gtk_color_button_root (GtkWidget *widget);
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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 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_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_activate (GtkColorButton *self)
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{
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gtk_widget_activate (self->button);
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}
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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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widget_class->grab_focus = gtk_widget_grab_focus_child;
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widget_class->focus = gtk_widget_focus_child;
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widget_class->root = gtk_color_button_root;
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klass->color_set = NULL;
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klass->activate = gtk_color_button_activate;
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g_object_class_override_property (gobject_class, PROP_RGBA, "rgba");
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g_object_class_override_property (gobject_class, PROP_USE_ALPHA, "use-alpha");
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/**
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* GtkColorButton:title: (attributes org.gtk.Property.get=gtk_color_button_get_title org.gtk.Property.set=gtk_color_button_set_title)
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*
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* The title of the color chooser 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", NULL, NULL,
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_("Pick a Color"),
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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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* Emitted when the user selects a color.
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*
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* When handling this signal, use [method@Gtk.ColorChooser.get_rgba]
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* to 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 changes the color.
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* If you need to react to programmatic color changes as well, use
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* the notify::rgba 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::activate:
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* @widget: the object which received the signal.
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*
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* Emitted to when the color button is activated.
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*
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* The `::activate` signal on `GtkMenuButton` is an action signal and
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* emitting it causes the button to pop up its dialog.
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*
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* Since: 4.4
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*/
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color_button_signals[ACTIVATE] =
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g_signal_new (I_ ("activate"),
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G_OBJECT_CLASS_TYPE (gobject_class),
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G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
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G_STRUCT_OFFSET (GtkColorButtonClass, activate),
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NULL, NULL,
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NULL,
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G_TYPE_NONE, 0);
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gtk_widget_class_set_activate_signal (widget_class, color_button_signals[ACTIVATE]);
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/**
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* GtkColorButton:show-editor:
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*
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* Whether the color chooser should open in editor mode.
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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", NULL, NULL,
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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:modal: (attributes org.gtk.Property.get=gtk_color_button_get_modal org.gtk.Property.set=gtk_color_button_set_modal)
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*
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* Whether the color chooser dialog should be modal.
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*/
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g_object_class_install_property (gobject_class,
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PROP_MODAL,
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g_param_spec_boolean ("modal", NULL, NULL,
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TRUE,
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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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gtk_widget_class_set_css_name (widget_class, "colorbutton");
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}
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static gboolean
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gtk_color_button_drop (GtkDropTarget *dest,
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const GValue *value,
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double x,
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double y,
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GtkColorButton *button)
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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 (button), color);
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return TRUE;
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}
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static GdkContentProvider *
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gtk_color_button_drag_prepare (GtkDragSource *source,
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double x,
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double y,
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GtkColorButton *button)
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{
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return gdk_content_provider_new_typed (GDK_TYPE_RGBA, &button->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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PangoLayout *layout;
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PangoRectangle rect;
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GtkDragSource *source;
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GtkDropTarget *dest;
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button->button = gtk_button_new ();
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g_signal_connect (button->button, "clicked", G_CALLBACK (gtk_color_button_clicked), button);
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gtk_widget_set_parent (button->button, GTK_WIDGET (button));
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button->swatch = g_object_new (GTK_TYPE_COLOR_SWATCH,
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"accessible-role", GTK_ACCESSIBLE_ROLE_IMG,
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"selectable", FALSE,
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"has-menu", FALSE,
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"can-drag", FALSE,
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NULL);
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gtk_widget_set_can_focus (button->swatch, FALSE);
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gtk_widget_remove_css_class (button->swatch, "activatable");
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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 (button->swatch, rect.width, rect.height);
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gtk_button_set_child (GTK_BUTTON (button->button), button->swatch);
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button->title = g_strdup (_("Pick a Color")); /* default title */
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/* Start with opaque black, alpha disabled */
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button->rgba.red = 0;
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button->rgba.green = 0;
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button->rgba.blue = 0;
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button->rgba.alpha = 1;
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button->use_alpha = FALSE;
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button->modal = TRUE;
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dest = gtk_drop_target_new (GDK_TYPE_RGBA, GDK_ACTION_COPY);
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g_signal_connect (dest, "drop", G_CALLBACK (gtk_color_button_drop), button);
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gtk_widget_add_controller (GTK_WIDGET (button), GTK_EVENT_CONTROLLER (dest));
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source = gtk_drag_source_new ();
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g_signal_connect (source, "prepare", G_CALLBACK (gtk_color_button_drag_prepare), button);
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gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (source), GTK_PHASE_CAPTURE);
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gtk_widget_add_controller (button->button, GTK_EVENT_CONTROLLER (source));
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gtk_widget_add_css_class (button->button, "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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if (button->cs_dialog != NULL)
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gtk_window_destroy (GTK_WINDOW (button->cs_dialog));
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g_free (button->title);
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gtk_widget_unparent (button->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 chooser 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 showing the given color.
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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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button->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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int 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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gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (dialog), &button->rgba);
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gtk_color_swatch_set_rgba (GTK_COLOR_SWATCH (button->swatch), &button->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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GtkWidget *parent, *dialog;
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if (button->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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button->cs_dialog = dialog = gtk_color_chooser_dialog_new (button->title, NULL);
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gtk_window_set_hide_on_close (GTK_WINDOW (dialog), TRUE);
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gtk_window_set_modal (GTK_WINDOW (dialog), button->modal);
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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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if (gtk_window_get_modal (GTK_WINDOW (parent)))
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gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
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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_root (GtkWidget *widget)
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{
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GtkColorButton *button = GTK_COLOR_BUTTON (widget);
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GtkWidget *parent;
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GTK_WIDGET_CLASS (gtk_color_button_parent_class)->root (widget);
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if (!button->cs_dialog)
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return;
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parent = GTK_WIDGET (gtk_widget_get_root (GTK_WIDGET (button)));
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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 (button->cs_dialog)))
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gtk_window_set_transient_for (GTK_WINDOW (button->cs_dialog), GTK_WINDOW (parent));
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if (gtk_window_get_modal (GTK_WINDOW (parent)))
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gtk_window_set_modal (GTK_WINDOW (button->cs_dialog), TRUE);
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}
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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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/* 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 (button->cs_dialog, "show-editor", button->show_editor, NULL);
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gtk_color_chooser_set_use_alpha (GTK_COLOR_CHOOSER (button->cs_dialog), button->use_alpha);
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gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (button->cs_dialog), &button->rgba);
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gtk_window_present (GTK_WINDOW (button->cs_dialog));
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}
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static guint
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scale_round (double value,
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double scale)
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{
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value = floor (value * scale + 0.5);
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value = CLAMP (value, 0, scale);
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return (guint)value;
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}
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static char *
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accessible_color_name (const GdkRGBA *color)
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{
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if (color->alpha < 1.0)
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return g_strdup_printf (_("Red %d%%, Green %d%%, Blue %d%%, Alpha %d%%"),
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scale_round (color->red, 100),
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scale_round (color->green, 100),
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scale_round (color->blue, 100),
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scale_round (color->alpha, 100));
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else
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return g_strdup_printf (_("Red %d%%, Green %d%%, Blue %d%%"),
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scale_round (color->red, 100),
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scale_round (color->green, 100),
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scale_round (color->blue, 100));
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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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GtkColorButton *button = GTK_COLOR_BUTTON (chooser);
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char *text;
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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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button->rgba = *rgba;
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gtk_color_swatch_set_rgba (GTK_COLOR_SWATCH (button->swatch), &button->rgba);
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text = accessible_color_name (rgba);
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gtk_accessible_update_property (GTK_ACCESSIBLE (button->swatch),
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GTK_ACCESSIBLE_PROPERTY_LABEL, text,
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-1);
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g_free (text);
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g_object_notify (G_OBJECT (chooser), "rgba");
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}
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static void
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gtk_color_button_get_rgba (GtkColorChooser *chooser,
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GdkRGBA *rgba)
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{
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GtkColorButton *button = 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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*rgba = button->rgba;
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}
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static void
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set_use_alpha (GtkColorButton *button,
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gboolean use_alpha)
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{
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use_alpha = (use_alpha != FALSE);
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if (button->use_alpha != use_alpha)
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{
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button->use_alpha = use_alpha;
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gtk_color_swatch_set_use_alpha (GTK_COLOR_SWATCH (button->swatch), use_alpha);
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g_object_notify (G_OBJECT (button), "use-alpha");
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}
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}
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/**
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* gtk_color_button_set_title: (attributes org.gtk.Method.set_property=title)
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* @button: a `GtkColorButton`
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* @title: String containing new window title
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*
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* Sets the title for the color chooser dialog.
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*/
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void
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gtk_color_button_set_title (GtkColorButton *button,
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const char *title)
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{
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char *old_title;
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g_return_if_fail (GTK_IS_COLOR_BUTTON (button));
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old_title = button->title;
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button->title = g_strdup (title);
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g_free (old_title);
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if (button->cs_dialog)
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gtk_window_set_title (GTK_WINDOW (button->cs_dialog), button->title);
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g_object_notify (G_OBJECT (button), "title");
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}
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/**
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* gtk_color_button_get_title: (attributes org.gtk.Method.get_property=title)
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* @button: a `GtkColorButton`
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*
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* Gets the title of the color chooser dialog.
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*
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* Returns: An internal string, do not free the return value
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*/
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const char *
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gtk_color_button_get_title (GtkColorButton *button)
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{
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g_return_val_if_fail (GTK_IS_COLOR_BUTTON (button), NULL);
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return button->title;
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}
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/**
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* gtk_color_button_set_modal: (attributes org.gtk.Method.set_property=modal)
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* @button: a `GtkColorButton`
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* @modal: %TRUE to make the dialog modal
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*
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* Sets whether the dialog should be modal.
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*/
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void
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gtk_color_button_set_modal (GtkColorButton *button,
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gboolean modal)
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{
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g_return_if_fail (GTK_IS_COLOR_BUTTON (button));
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|
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if (button->modal == modal)
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return;
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|
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button->modal = modal;
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if (button->cs_dialog)
|
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gtk_window_set_modal (GTK_WINDOW (button->cs_dialog), button->modal);
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g_object_notify (G_OBJECT (button), "modal");
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}
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/**
|
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* gtk_color_button_get_modal: (attributes org.gtk.Method.get_property=modal)
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* @button: a `GtkColorButton`
|
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*
|
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* Gets whether the dialog is modal.
|
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*
|
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* Returns: %TRUE if the dialog is modal
|
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*/
|
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gboolean
|
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gtk_color_button_get_modal (GtkColorButton *button)
|
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{
|
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g_return_val_if_fail (GTK_IS_COLOR_BUTTON (button), FALSE);
|
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|
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return button->modal;
|
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}
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|
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static void
|
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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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GtkColorButton *button = GTK_COLOR_BUTTON (object);
|
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|
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switch (param_id)
|
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{
|
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case PROP_USE_ALPHA:
|
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set_use_alpha (button, g_value_get_boolean (value));
|
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break;
|
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case PROP_TITLE:
|
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gtk_color_button_set_title (button, g_value_get_string (value));
|
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break;
|
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case PROP_RGBA:
|
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gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (button), g_value_get_boxed (value));
|
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break;
|
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case PROP_SHOW_EDITOR:
|
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{
|
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gboolean show_editor = g_value_get_boolean (value);
|
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if (button->show_editor != show_editor)
|
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{
|
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button->show_editor = show_editor;
|
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g_object_notify (object, "show-editor");
|
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}
|
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}
|
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break;
|
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case PROP_MODAL:
|
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gtk_color_button_set_modal (button, g_value_get_boolean (value));
|
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break;
|
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default:
|
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
|
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break;
|
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}
|
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}
|
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|
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static void
|
|
gtk_color_button_get_property (GObject *object,
|
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guint param_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GtkColorButton *button = GTK_COLOR_BUTTON (object);
|
|
|
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switch (param_id)
|
|
{
|
|
case PROP_USE_ALPHA:
|
|
g_value_set_boolean (value, button->use_alpha);
|
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break;
|
|
case PROP_TITLE:
|
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g_value_set_string (value, gtk_color_button_get_title (button));
|
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break;
|
|
case PROP_RGBA:
|
|
{
|
|
GdkRGBA rgba;
|
|
|
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gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (button), &rgba);
|
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g_value_set_boxed (value, &rgba);
|
|
}
|
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break;
|
|
case PROP_SHOW_EDITOR:
|
|
g_value_set_boolean (value, button->show_editor);
|
|
break;
|
|
case PROP_MODAL:
|
|
g_value_set_boolean (value, button->modal);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
|
|
break;
|
|
}
|
|
}
|
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|
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static void
|
|
gtk_color_button_add_palette (GtkColorChooser *chooser,
|
|
GtkOrientation orientation,
|
|
int colors_per_line,
|
|
int n_colors,
|
|
GdkRGBA *colors)
|
|
{
|
|
GtkColorButton *button = GTK_COLOR_BUTTON (chooser);
|
|
|
|
ensure_dialog (button);
|
|
|
|
gtk_color_chooser_add_palette (GTK_COLOR_CHOOSER (button->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;
|
|
}
|