forked from AuroraMiddleware/gtk
553a9c292d
set_active() is meant to set the state of the property, which happens during setup. The clicked signal is emitting events from user actions. It is impossible to use Togglebuttons for MVC applications as long as it does that.
390 lines
11 KiB
C
390 lines
11 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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/*
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* Modified by the GTK+ Team and others 1997-2000. 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 "gtktogglebutton.h"
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#include "gtkbuttonprivate.h"
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#include "gtkintl.h"
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#include "gtklabel.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 "gtkstylecontext.h"
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#include "a11y/gtktogglebuttonaccessible.h"
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/**
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* SECTION:gtktogglebutton
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* @Short_description: Create buttons which retain their state
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* @Title: GtkToggleButton
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* @See_also: #GtkButton, #GtkCheckButton, #GtkCheckMenuItem
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*
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* A #GtkToggleButton is a #GtkButton which will remain “pressed-in” when
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* clicked. Clicking again will cause the toggle button to return to its
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* normal state.
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*
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* A toggle button is created by calling either gtk_toggle_button_new() or
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* gtk_toggle_button_new_with_label(). If using the former, it is advisable to
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* pack a widget, (such as a #GtkLabel and/or a #GtkImage), into the toggle
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* button’s container. (See #GtkButton for more information).
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*
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* The state of a #GtkToggleButton can be set specifically using
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* gtk_toggle_button_set_active(), and retrieved using
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* gtk_toggle_button_get_active().
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*
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* To simply switch the state of a toggle button, use gtk_toggle_button_toggled().
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*
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* # CSS nodes
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*
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* GtkToggleButton has a single CSS node with name button. To differentiate
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* it from a plain #GtkButton, it gets the .toggle style class.
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*
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* ## Creating two #GtkToggleButton widgets.
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*
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* |[<!-- language="C" -->
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* static void output_state (GtkToggleButton *source, gpointer user_data) {
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* printf ("Active: %d\n", gtk_toggle_button_get_active (source));
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* }
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*
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* void make_toggles (void) {
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* GtkWidget *window, *toggle1, *toggle2;
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* GtkWidget *box;
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* const char *text;
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*
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* window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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* box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
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*
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* text = "Hi, I’m a toggle button.";
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* toggle1 = gtk_toggle_button_new_with_label (text);
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*
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* g_signal_connect (toggle1, "toggled",
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* G_CALLBACK (output_state),
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* NULL);
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* gtk_container_add (GTK_CONTAINER (box), toggle1);
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*
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* text = "Hi, I’m a toggle button.";
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* toggle2 = gtk_toggle_button_new_with_label (text);
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* g_signal_connect (toggle2, "toggled",
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* G_CALLBACK (output_state),
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* NULL);
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* gtk_container_add (GTK_CONTAINER (box), toggle2);
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*
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* gtk_container_add (GTK_CONTAINER (window), box);
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* gtk_widget_show (window);
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* }
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* ]|
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*/
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typedef struct _GtkToggleButtonPrivate GtkToggleButtonPrivate;
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struct _GtkToggleButtonPrivate
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{
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guint active : 1;
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};
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enum {
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TOGGLED,
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LAST_SIGNAL
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};
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enum {
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PROP_0,
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PROP_ACTIVE,
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NUM_PROPERTIES
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};
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static GParamSpec *toggle_button_props[NUM_PROPERTIES] = { NULL, };
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static gboolean gtk_toggle_button_mnemonic_activate (GtkWidget *widget,
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gboolean group_cycling);
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static void gtk_toggle_button_clicked (GtkButton *button);
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static void gtk_toggle_button_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_toggle_button_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static guint toggle_button_signals[LAST_SIGNAL] = { 0 };
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G_DEFINE_TYPE_WITH_CODE (GtkToggleButton, gtk_toggle_button, GTK_TYPE_BUTTON,
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G_ADD_PRIVATE (GtkToggleButton))
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static void
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gtk_toggle_button_class_init (GtkToggleButtonClass *class)
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{
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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GtkButtonClass *button_class;
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gobject_class = G_OBJECT_CLASS (class);
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widget_class = (GtkWidgetClass*) class;
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button_class = (GtkButtonClass*) class;
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gobject_class->set_property = gtk_toggle_button_set_property;
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gobject_class->get_property = gtk_toggle_button_get_property;
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widget_class->mnemonic_activate = gtk_toggle_button_mnemonic_activate;
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button_class->clicked = gtk_toggle_button_clicked;
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class->toggled = NULL;
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toggle_button_props[PROP_ACTIVE] =
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g_param_spec_boolean ("active",
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P_("Active"),
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P_("If the toggle button should be pressed in"),
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (gobject_class, NUM_PROPERTIES, toggle_button_props);
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/**
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* GtkToggleButton::toggled:
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* @togglebutton: the object which received the signal.
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*
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* Should be connected if you wish to perform an action whenever the
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* #GtkToggleButton's state is changed.
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*/
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toggle_button_signals[TOGGLED] =
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g_signal_new (I_("toggled"),
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G_OBJECT_CLASS_TYPE (gobject_class),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GtkToggleButtonClass, toggled),
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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_accessible_type (widget_class, GTK_TYPE_TOGGLE_BUTTON_ACCESSIBLE);
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gtk_widget_class_set_css_name (widget_class, I_("button"));
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}
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static void
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gtk_toggle_button_init (GtkToggleButton *toggle_button)
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{
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GtkToggleButtonPrivate *priv = gtk_toggle_button_get_instance_private (toggle_button);
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GtkStyleContext *context;
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priv->active = FALSE;
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context = gtk_widget_get_style_context (GTK_WIDGET (toggle_button));
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gtk_style_context_add_class (context, "toggle");
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}
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/**
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* gtk_toggle_button_new:
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*
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* Creates a new toggle button. A widget should be packed into the button, as in gtk_button_new().
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*
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* Returns: a new toggle button.
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*/
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GtkWidget*
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gtk_toggle_button_new (void)
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{
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return g_object_new (GTK_TYPE_TOGGLE_BUTTON, NULL);
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}
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/**
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* gtk_toggle_button_new_with_label:
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* @label: a string containing the message to be placed in the toggle button.
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*
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* Creates a new toggle button with a text label.
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*
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* Returns: a new toggle button.
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*/
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GtkWidget*
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gtk_toggle_button_new_with_label (const gchar *label)
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{
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return g_object_new (GTK_TYPE_TOGGLE_BUTTON, "label", label, NULL);
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}
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/**
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* gtk_toggle_button_new_with_mnemonic:
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* @label: the text of the button, with an underscore in front of the
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* mnemonic character
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*
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* Creates a new #GtkToggleButton containing a label. The label
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* will be created using gtk_label_new_with_mnemonic(), so underscores
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* in @label indicate the mnemonic for the button.
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*
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* Returns: a new #GtkToggleButton
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*/
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GtkWidget*
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gtk_toggle_button_new_with_mnemonic (const gchar *label)
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{
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return g_object_new (GTK_TYPE_TOGGLE_BUTTON,
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"label", label,
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"use-underline", TRUE,
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NULL);
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}
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static void
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gtk_toggle_button_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkToggleButton *tb;
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tb = GTK_TOGGLE_BUTTON (object);
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switch (prop_id)
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{
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case PROP_ACTIVE:
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gtk_toggle_button_set_active (tb, 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, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_toggle_button_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkToggleButton *tb = GTK_TOGGLE_BUTTON (object);
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GtkToggleButtonPrivate *priv = gtk_toggle_button_get_instance_private (tb);
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switch (prop_id)
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{
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case PROP_ACTIVE:
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g_value_set_boolean (value, priv->active);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/**
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* gtk_toggle_button_set_active:
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* @toggle_button: a #GtkToggleButton.
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* @is_active: %TRUE or %FALSE.
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*
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* Sets the status of the toggle button. Set to %TRUE if you want the
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* GtkToggleButton to be “pressed in”, and %FALSE to raise it.
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*
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* If the status of the button changes, this action causes the
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* #GtkToggleButton::toggled signal to be emitted.
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*/
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void
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gtk_toggle_button_set_active (GtkToggleButton *toggle_button,
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gboolean is_active)
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{
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GtkToggleButtonPrivate *priv = gtk_toggle_button_get_instance_private (toggle_button);
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g_return_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button));
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is_active = is_active != FALSE;
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if (priv->active == is_active)
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return;
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priv->active = is_active;
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if (is_active)
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gtk_widget_set_state_flags (GTK_WIDGET (toggle_button), GTK_STATE_FLAG_CHECKED, FALSE);
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else
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gtk_widget_unset_state_flags (GTK_WIDGET (toggle_button), GTK_STATE_FLAG_CHECKED);
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gtk_toggle_button_toggled (toggle_button);
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g_object_notify_by_pspec (G_OBJECT (toggle_button), toggle_button_props[PROP_ACTIVE]);
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}
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/**
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* gtk_toggle_button_get_active:
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* @toggle_button: a #GtkToggleButton.
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*
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* Queries a #GtkToggleButton and returns its current state. Returns %TRUE if
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* the toggle button is pressed in and %FALSE if it is raised.
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*
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* Returns: a #gboolean value.
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*/
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gboolean
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gtk_toggle_button_get_active (GtkToggleButton *toggle_button)
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{
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GtkToggleButtonPrivate *priv = gtk_toggle_button_get_instance_private (toggle_button);
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g_return_val_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button), FALSE);
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return priv->active;
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}
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/**
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* gtk_toggle_button_toggled:
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* @toggle_button: a #GtkToggleButton.
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*
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* Emits the #GtkToggleButton::toggled signal on the
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* #GtkToggleButton. There is no good reason for an
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* application ever to call this function.
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*/
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void
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gtk_toggle_button_toggled (GtkToggleButton *toggle_button)
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{
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g_return_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button));
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g_signal_emit (toggle_button, toggle_button_signals[TOGGLED], 0);
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}
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static gboolean
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gtk_toggle_button_mnemonic_activate (GtkWidget *widget,
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gboolean group_cycling)
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{
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/*
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* We override the standard implementation in
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* gtk_widget_real_mnemonic_activate() in order to focus the widget even
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* if there is no mnemonic conflict.
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*/
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if (gtk_widget_get_can_focus (widget))
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gtk_widget_grab_focus (widget);
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if (!group_cycling)
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gtk_widget_activate (widget);
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return TRUE;
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}
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static void
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gtk_toggle_button_clicked (GtkButton *button)
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{
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GtkToggleButton *toggle_button = GTK_TOGGLE_BUTTON (button);
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GtkToggleButtonPrivate *priv = gtk_toggle_button_get_instance_private (toggle_button);
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gtk_toggle_button_set_active (toggle_button, !priv->active);
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if (GTK_BUTTON_CLASS (gtk_toggle_button_parent_class)->clicked)
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GTK_BUTTON_CLASS (gtk_toggle_button_parent_class)->clicked (button);
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}
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