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gtk2/gtk/gtktogglebutton.c

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtktogglebutton.h"
#include "gtkbuttonprivate.h"
#include "gtklabel.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtktoggleaction.h"
#include "gtkactivatable.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "a11y/gtktogglebuttonaccessible.h"
/**
* SECTION:gtktogglebutton
* @Short_description: Create buttons which retain their state
* @Title: GtkToggleButton
* @See_also: #GtkButton, #GtkCheckButton, #GtkCheckMenuItem
*
* A #GtkToggleButton is a #GtkButton which will remain 'pressed-in' when
* clicked. Clicking again will cause the toggle button to return to its
* normal state.
*
* A toggle button is created by calling either gtk_toggle_button_new() or
* gtk_toggle_button_new_with_label(). If using the former, it is advisable to
* pack a widget, (such as a #GtkLabel and/or a #GtkImage), into the toggle
* button's container. (See #GtkButton for more information).
*
* The state of a #GtkToggleButton can be set specifically using
* gtk_toggle_button_set_active(), and retrieved using
* gtk_toggle_button_get_active().
*
* To simply switch the state of a toggle button, use gtk_toggle_button_toggled().
*
* <example>
* <title>Creating two #GtkToggleButton widgets.</title>
* <programlisting>
* void make_toggles (void) {
* GtkWidget *dialog, *toggle1, *toggle2;
*
* dialog = gtk_dialog_new (<!-- -->);
* toggle1 = gtk_toggle_button_new_with_label ("Hi, i'm a toggle button.");
*
* // Makes this toggle button invisible
* gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (toggle1), TRUE);
*
* g_signal_connect (toggle1, "toggled",
* G_CALLBACK (output_state), NULL);
* gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->action_area),
* toggle1, FALSE, FALSE, 2);
*
* toggle2 = gtk_toggle_button_new_with_label ("Hi, i'm another toggle button.");
* gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (toggle2), FALSE);
* g_signal_connect (toggle2, "toggled",
* G_CALLBACK (output_state), NULL);
* gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->action_area),
* toggle2, FALSE, FALSE, 2);
*
* gtk_widget_show_all (dialog);
* }
* </programlisting>
* </example>
*/
#define DEFAULT_LEFT_POS 4
#define DEFAULT_TOP_POS 4
#define DEFAULT_SPACING 7
struct _GtkToggleButtonPrivate
{
guint active : 1;
guint draw_indicator : 1;
guint inconsistent : 1;
};
enum {
TOGGLED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_ACTIVE,
PROP_INCONSISTENT,
PROP_DRAW_INDICATOR
};
static gboolean gtk_toggle_button_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling);
static void gtk_toggle_button_pressed (GtkButton *button);
static void gtk_toggle_button_released (GtkButton *button);
static void gtk_toggle_button_clicked (GtkButton *button);
static void gtk_toggle_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_toggle_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_toggle_button_update_state (GtkButton *button);
static void gtk_toggle_button_activatable_interface_init (GtkActivatableIface *iface);
static void gtk_toggle_button_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name);
static void gtk_toggle_button_sync_action_properties (GtkActivatable *activatable,
GtkAction *action);
static GtkActivatableIface *parent_activatable_iface;
static guint toggle_button_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_CODE (GtkToggleButton, gtk_toggle_button, GTK_TYPE_BUTTON,
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACTIVATABLE,
gtk_toggle_button_activatable_interface_init))
static void
gtk_toggle_button_class_init (GtkToggleButtonClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkButtonClass *button_class;
gobject_class = G_OBJECT_CLASS (class);
widget_class = (GtkWidgetClass*) class;
button_class = (GtkButtonClass*) class;
gobject_class->set_property = gtk_toggle_button_set_property;
gobject_class->get_property = gtk_toggle_button_get_property;
widget_class->mnemonic_activate = gtk_toggle_button_mnemonic_activate;
button_class->pressed = gtk_toggle_button_pressed;
button_class->released = gtk_toggle_button_released;
button_class->clicked = gtk_toggle_button_clicked;
button_class->enter = gtk_toggle_button_update_state;
button_class->leave = gtk_toggle_button_update_state;
class->toggled = NULL;
g_object_class_install_property (gobject_class,
PROP_ACTIVE,
g_param_spec_boolean ("active",
P_("Active"),
P_("If the toggle button should be pressed in"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_INCONSISTENT,
g_param_spec_boolean ("inconsistent",
P_("Inconsistent"),
P_("If the toggle button is in an \"in between\" state"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_DRAW_INDICATOR,
g_param_spec_boolean ("draw-indicator",
P_("Draw Indicator"),
P_("If the toggle part of the button is displayed"),
FALSE,
GTK_PARAM_READWRITE));
/**
* GtkToggleButton::toggled:
* @togglebutton: the object which received the signal.
*
* Should be connected if you wish to perform an action whenever the
* #GtkToggleButton's state is changed.
*/
toggle_button_signals[TOGGLED] =
g_signal_new (I_("toggled"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkToggleButtonClass, toggled),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_type_class_add_private (class, sizeof (GtkToggleButtonPrivate));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_TOGGLE_BUTTON_ACCESSIBLE);
}
static void
gtk_toggle_button_init (GtkToggleButton *toggle_button)
{
GtkToggleButtonPrivate *priv;
toggle_button->priv = G_TYPE_INSTANCE_GET_PRIVATE (toggle_button,
GTK_TYPE_TOGGLE_BUTTON,
GtkToggleButtonPrivate);
priv = toggle_button->priv;
priv->active = FALSE;
priv->draw_indicator = FALSE;
GTK_BUTTON (toggle_button)->priv->depress_on_activate = TRUE;
}
static void
gtk_toggle_button_activatable_interface_init (GtkActivatableIface *iface)
{
parent_activatable_iface = g_type_interface_peek_parent (iface);
iface->update = gtk_toggle_button_update;
iface->sync_action_properties = gtk_toggle_button_sync_action_properties;
}
static void
gtk_toggle_button_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name)
{
GtkToggleButton *button;
parent_activatable_iface->update (activatable, action, property_name);
button = GTK_TOGGLE_BUTTON (activatable);
if (strcmp (property_name, "active") == 0)
{
gtk_action_block_activate (action);
gtk_toggle_button_set_active (button, gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action)));
gtk_action_unblock_activate (action);
}
}
static void
gtk_toggle_button_sync_action_properties (GtkActivatable *activatable,
GtkAction *action)
{
GtkToggleButton *button;
parent_activatable_iface->sync_action_properties (activatable, action);
if (!GTK_IS_TOGGLE_ACTION (action))
return;
button = GTK_TOGGLE_BUTTON (activatable);
gtk_action_block_activate (action);
gtk_toggle_button_set_active (button, gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action)));
gtk_action_unblock_activate (action);
}
/**
* gtk_toggle_button_new:
*
* Creates a new toggle button. A widget should be packed into the button, as in gtk_button_new().
*
* Returns: a new toggle button.
*/
GtkWidget*
gtk_toggle_button_new (void)
{
return g_object_new (GTK_TYPE_TOGGLE_BUTTON, NULL);
}
/**
* gtk_toggle_button_new_with_label:
* @label: a string containing the message to be placed in the toggle button.
*
* Creates a new toggle button with a text label.
*
* Returns: a new toggle button.
*/
GtkWidget*
gtk_toggle_button_new_with_label (const gchar *label)
{
return g_object_new (GTK_TYPE_TOGGLE_BUTTON, "label", label, NULL);
}
/**
* gtk_toggle_button_new_with_mnemonic:
* @label: the text of the button, with an underscore in front of the
* mnemonic character
*
* Creates a new #GtkToggleButton containing a label. The label
* will be created using gtk_label_new_with_mnemonic(), so underscores
* in @label indicate the mnemonic for the button.
*
* Returns: a new #GtkToggleButton
*/
GtkWidget*
gtk_toggle_button_new_with_mnemonic (const gchar *label)
{
return g_object_new (GTK_TYPE_TOGGLE_BUTTON,
"label", label,
"use-underline", TRUE,
NULL);
}
static void
gtk_toggle_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkToggleButton *tb;
tb = GTK_TOGGLE_BUTTON (object);
switch (prop_id)
{
case PROP_ACTIVE:
gtk_toggle_button_set_active (tb, g_value_get_boolean (value));
break;
case PROP_INCONSISTENT:
gtk_toggle_button_set_inconsistent (tb, g_value_get_boolean (value));
break;
case PROP_DRAW_INDICATOR:
gtk_toggle_button_set_mode (tb, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_toggle_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkToggleButton *tb = GTK_TOGGLE_BUTTON (object);
GtkToggleButtonPrivate *priv = tb->priv;
switch (prop_id)
{
case PROP_ACTIVE:
g_value_set_boolean (value, priv->active);
break;
case PROP_INCONSISTENT:
g_value_set_boolean (value, priv->inconsistent);
break;
case PROP_DRAW_INDICATOR:
g_value_set_boolean (value, priv->draw_indicator);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_toggle_button_set_mode:
* @toggle_button: a #GtkToggleButton
* @draw_indicator: if %TRUE, draw the button as a separate indicator
* and label; if %FALSE, draw the button like a normal button
*
* Sets whether the button is displayed as a separate indicator and label.
* You can call this function on a checkbutton or a radiobutton with
* @draw_indicator = %FALSE to make the button look like a normal button
*
* This function only affects instances of classes like #GtkCheckButton
* and #GtkRadioButton that derive from #GtkToggleButton,
* not instances of #GtkToggleButton itself.
*/
void
gtk_toggle_button_set_mode (GtkToggleButton *toggle_button,
gboolean draw_indicator)
{
GtkToggleButtonPrivate *priv;
g_return_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button));
priv = toggle_button->priv;
draw_indicator = draw_indicator ? TRUE : FALSE;
if (priv->draw_indicator != draw_indicator)
{
GtkStyleContext *context;
priv->draw_indicator = draw_indicator;
GTK_BUTTON (toggle_button)->priv->depress_on_activate = !draw_indicator;
if (gtk_widget_get_visible (GTK_WIDGET (toggle_button)))
gtk_widget_queue_resize (GTK_WIDGET (toggle_button));
g_object_notify (G_OBJECT (toggle_button), "draw-indicator");
/* Make toggle buttons conditionally have the "button"
* class depending on draw_indicator.
*/
context = gtk_widget_get_style_context (GTK_WIDGET (toggle_button));
if (draw_indicator)
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BUTTON);
else
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
}
}
/**
* gtk_toggle_button_get_mode:
* @toggle_button: a #GtkToggleButton
*
* Retrieves whether the button is displayed as a separate indicator
* and label. See gtk_toggle_button_set_mode().
*
* Return value: %TRUE if the togglebutton is drawn as a separate indicator
* and label.
**/
gboolean
gtk_toggle_button_get_mode (GtkToggleButton *toggle_button)
{
g_return_val_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button), FALSE);
return toggle_button->priv->draw_indicator;
}
/**
* gtk_toggle_button_set_active:
* @toggle_button: a #GtkToggleButton.
* @is_active: %TRUE or %FALSE.
*
* Sets the status of the toggle button. Set to %TRUE if you want the
* GtkToggleButton to be 'pressed in', and %FALSE to raise it.
* This action causes the #GtkToggleButton::toggled signal and the
* #GtkButton::clicked signal to be emitted.
*/
void
gtk_toggle_button_set_active (GtkToggleButton *toggle_button,
gboolean is_active)
{
GtkToggleButtonPrivate *priv;
g_return_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button));
priv = toggle_button->priv;
is_active = is_active != FALSE;
if (priv->active != is_active)
gtk_button_clicked (GTK_BUTTON (toggle_button));
}
void
_gtk_toggle_button_set_active (GtkToggleButton *toggle_button,
gboolean is_active)
{
toggle_button->priv->active = is_active;
}
/**
* gtk_toggle_button_get_active:
* @toggle_button: a #GtkToggleButton.
*
* Queries a #GtkToggleButton and returns its current state. Returns %TRUE if
* the toggle button is pressed in and %FALSE if it is raised.
*
* Returns: a #gboolean value.
*/
gboolean
gtk_toggle_button_get_active (GtkToggleButton *toggle_button)
{
g_return_val_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button), FALSE);
return toggle_button->priv->active;
}
/**
* gtk_toggle_button_toggled:
* @toggle_button: a #GtkToggleButton.
*
* Emits the #GtkToggleButton::toggled signal on the
* #GtkToggleButton. There is no good reason for an
* application ever to call this function.
*/
void
gtk_toggle_button_toggled (GtkToggleButton *toggle_button)
{
g_return_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button));
g_signal_emit (toggle_button, toggle_button_signals[TOGGLED], 0);
}
/**
* gtk_toggle_button_set_inconsistent:
* @toggle_button: a #GtkToggleButton
* @setting: %TRUE if state is inconsistent
*
* If the user has selected a range of elements (such as some text or
* spreadsheet cells) that are affected by a toggle button, and the
* current values in that range are inconsistent, you may want to
* display the toggle in an "in between" state. This function turns on
* "in between" display. Normally you would turn off the inconsistent
* state again if the user toggles the toggle button. This has to be
* done manually, gtk_toggle_button_set_inconsistent() only affects
* visual appearance, it doesn't affect the semantics of the button.
*
**/
void
gtk_toggle_button_set_inconsistent (GtkToggleButton *toggle_button,
gboolean setting)
{
GtkToggleButtonPrivate *priv;
g_return_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button));
priv = toggle_button->priv;
setting = setting != FALSE;
if (setting != priv->inconsistent)
{
priv->inconsistent = setting;
gtk_toggle_button_update_state (GTK_BUTTON (toggle_button));
gtk_widget_queue_draw (GTK_WIDGET (toggle_button));
g_object_notify (G_OBJECT (toggle_button), "inconsistent");
}
}
/**
* gtk_toggle_button_get_inconsistent:
* @toggle_button: a #GtkToggleButton
*
* Gets the value set by gtk_toggle_button_set_inconsistent().
*
* Return value: %TRUE if the button is displayed as inconsistent, %FALSE otherwise
**/
gboolean
gtk_toggle_button_get_inconsistent (GtkToggleButton *toggle_button)
{
g_return_val_if_fail (GTK_IS_TOGGLE_BUTTON (toggle_button), FALSE);
return toggle_button->priv->inconsistent;
}
static gboolean
gtk_toggle_button_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling)
{
/*
* We override the standard implementation in
* gtk_widget_real_mnemonic_activate() in order to focus the widget even
* if there is no mnemonic conflict.
*/
if (gtk_widget_get_can_focus (widget))
gtk_widget_grab_focus (widget);
if (!group_cycling)
gtk_widget_activate (widget);
return TRUE;
}
static void
gtk_toggle_button_pressed (GtkButton *button)
{
button->priv->button_down = TRUE;
gtk_toggle_button_update_state (button);
gtk_widget_queue_draw (GTK_WIDGET (button));
}
static void
gtk_toggle_button_released (GtkButton *button)
{
if (button->priv->button_down)
{
button->priv->button_down = FALSE;
if (button->priv->in_button)
gtk_button_clicked (button);
gtk_toggle_button_update_state (button);
gtk_widget_queue_draw (GTK_WIDGET (button));
}
}
static void
gtk_toggle_button_clicked (GtkButton *button)
{
GtkToggleButton *toggle_button = GTK_TOGGLE_BUTTON (button);
GtkToggleButtonPrivate *priv = toggle_button->priv;
priv->active = !priv->active;
gtk_toggle_button_toggled (toggle_button);
gtk_toggle_button_update_state (button);
g_object_notify (G_OBJECT (toggle_button), "active");
if (GTK_BUTTON_CLASS (gtk_toggle_button_parent_class)->clicked)
GTK_BUTTON_CLASS (gtk_toggle_button_parent_class)->clicked (button);
}
static void
gtk_toggle_button_update_state (GtkButton *button)
{
GtkToggleButton *toggle_button = GTK_TOGGLE_BUTTON (button);
GtkToggleButtonPrivate *priv = toggle_button->priv;
gboolean depressed;
GtkStateFlags new_state = 0;
new_state = gtk_widget_get_state_flags (GTK_WIDGET (button)) &
~(GTK_STATE_FLAG_INCONSISTENT |
GTK_STATE_FLAG_PRELIGHT |
GTK_STATE_FLAG_ACTIVE);
if (priv->inconsistent)
new_state |= GTK_STATE_FLAG_INCONSISTENT;
if (priv->inconsistent)
depressed = FALSE;
else if (button->priv->in_button && button->priv->button_down)
depressed = TRUE;
else
depressed = priv->active;
if (button->priv->in_button && (!button->priv->button_down || priv->draw_indicator))
new_state |= GTK_STATE_FLAG_PRELIGHT;
if (depressed)
new_state |= GTK_STATE_FLAG_ACTIVE;
_gtk_button_set_depressed (button, depressed);
gtk_widget_set_state_flags (GTK_WIDGET (toggle_button), new_state, TRUE);
}
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