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gtk2/gtk/gtkbutton.c
Matthias Clasen 9d06ee637b button: Restore focus 
The custom gadget draw function has the side effect of informing
the gadget machinery wether to draw focus or not. Bring the
draw function back, just for its boolean return value. We may
want to find a better solution for this.
2016-10-18 11:49:12 +01:00

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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 1997-2001. 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/.
*/
/**
* SECTION:gtkbutton
* @Short_description: A widget that emits a signal when clicked on
* @Title: GtkButton
*
* The #GtkButton widget is generally used to trigger a callback function that is
* called when the button is pressed. The various signals and how to use them
* are outlined below.
*
* The #GtkButton widget can hold any valid child widget. That is, it can hold
* almost any other standard #GtkWidget. The most commonly used child is the
* #GtkLabel.
*
* # CSS nodes
*
* GtkButton has a single CSS node with name button. The node will get the
* style classes .image-button or .text-button, if the content is just an
* image or label, respectively. It may also receive the .flat style class.
*
* Other style classes that are commonly used with GtkButton include
* .suggested-action and .destructive-action. In special cases, buttons
* can be made round by adding the .circular style class.
*
* Button-like widgets like #GtkToggleButton, #GtkMenuButton, #GtkVolumeButton,
* #GtkLockButton, #GtkColorButton, #GtkFontButton or #GtkFileChooserButton use
* style classes such as .toggle, .popup, .scale, .lock, .color, .font, .file
* to differentiate themselves from a plain GtkButton.
*/
#include "config.h"
#include "gtkbutton.h"
#include "gtkbuttonprivate.h"
#include <string.h>
#include "gtklabel.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkimage.h"
#include "gtkbox.h"
#include "gtksizerequest.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "a11y/gtkbuttonaccessible.h"
#include "gtkapplicationprivate.h"
#include "gtkactionhelper.h"
#include "gtkcsscustomgadgetprivate.h"
#include "gtkcontainerprivate.h"
/* Time out before giving up on getting a key release when animating
* the close button.
*/
#define ACTIVATE_TIMEOUT 250
enum {
CLICKED,
ENTER,
LEAVE,
ACTIVATE,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_LABEL,
PROP_RELIEF,
PROP_USE_UNDERLINE,
PROP_ICON_NAME,
/* actionable properties */
PROP_ACTION_NAME,
PROP_ACTION_TARGET,
LAST_PROP = PROP_ACTION_NAME
};
static void gtk_button_finalize (GObject *object);
static void gtk_button_dispose (GObject *object);
static void gtk_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_button_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen);
static void gtk_button_realize (GtkWidget * widget);
static void gtk_button_unrealize (GtkWidget * widget);
static void gtk_button_map (GtkWidget * widget);
static void gtk_button_unmap (GtkWidget * widget);
static void gtk_button_size_allocate (GtkWidget * widget,
GtkAllocation * allocation);
static GskRenderNode *gtk_button_get_render_node (GtkWidget *widget,
GskRenderer *renderer);
static gint gtk_button_grab_broken (GtkWidget * widget,
GdkEventGrabBroken * event);
static gint gtk_button_key_release (GtkWidget * widget, GdkEventKey * event);
static gint gtk_button_enter_notify (GtkWidget * widget,
GdkEventCrossing * event);
static gint gtk_button_leave_notify (GtkWidget * widget,
GdkEventCrossing * event);
static void gtk_real_button_clicked (GtkButton * button);
static void gtk_real_button_activate (GtkButton *button);
static void gtk_button_update_state (GtkButton *button);
static void gtk_button_finish_activate (GtkButton *button,
gboolean do_it);
static void gtk_button_state_changed (GtkWidget *widget,
GtkStateType previous_state);
static void gtk_button_grab_notify (GtkWidget *widget,
gboolean was_grabbed);
static void gtk_button_do_release (GtkButton *button,
gboolean emit_clicked);
static void gtk_button_actionable_iface_init (GtkActionableInterface *iface);
static void gtk_button_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_button_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_button_get_preferred_width_for_height (GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size);
static void gtk_button_get_preferred_height_for_width (GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size);
static void gtk_button_get_preferred_height_and_baseline_for_width (GtkWidget *widget,
gint width,
gint *minimum_size,
gint *natural_size,
gint *minimum_baseline,
gint *natural_baseline);
static void gtk_button_measure (GtkCssGadget *gadget,
GtkOrientation orientation,
int for_size,
int *minimum_size,
int *natural_size,
int *minimum_baseline,
int *natural_baseline,
gpointer data);
static void gtk_button_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer data);
static GParamSpec *props[LAST_PROP] = { NULL, };
static guint button_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_CODE (GtkButton, gtk_button, GTK_TYPE_BIN,
G_ADD_PRIVATE (GtkButton)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACTIONABLE, gtk_button_actionable_iface_init))
static void
gtk_button_class_init (GtkButtonClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = G_OBJECT_CLASS (klass);
widget_class = (GtkWidgetClass*) klass;
gobject_class->dispose = gtk_button_dispose;
gobject_class->finalize = gtk_button_finalize;
gobject_class->set_property = gtk_button_set_property;
gobject_class->get_property = gtk_button_get_property;
widget_class->get_preferred_width = gtk_button_get_preferred_width;
widget_class->get_preferred_height = gtk_button_get_preferred_height;
widget_class->get_preferred_width_for_height = gtk_button_get_preferred_width_for_height;
widget_class->get_preferred_height_for_width = gtk_button_get_preferred_height_for_width;
widget_class->get_preferred_height_and_baseline_for_width = gtk_button_get_preferred_height_and_baseline_for_width;
widget_class->screen_changed = gtk_button_screen_changed;
widget_class->realize = gtk_button_realize;
widget_class->unrealize = gtk_button_unrealize;
widget_class->map = gtk_button_map;
widget_class->unmap = gtk_button_unmap;
widget_class->size_allocate = gtk_button_size_allocate;
widget_class->get_render_node = gtk_button_get_render_node;
widget_class->grab_broken_event = gtk_button_grab_broken;
widget_class->key_release_event = gtk_button_key_release;
widget_class->enter_notify_event = gtk_button_enter_notify;
widget_class->leave_notify_event = gtk_button_leave_notify;
widget_class->state_changed = gtk_button_state_changed;
widget_class->grab_notify = gtk_button_grab_notify;
klass->clicked = NULL;
klass->activate = gtk_real_button_activate;
props[PROP_LABEL] =
g_param_spec_string ("label",
P_("Label"),
P_("Text of the label widget inside the button, if the button contains a label widget"),
NULL,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
props[PROP_USE_UNDERLINE] =
g_param_spec_boolean ("use-underline",
P_("Use underline"),
P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
props[PROP_RELIEF] =
g_param_spec_enum ("relief",
P_("Border relief"),
P_("The border relief style"),
GTK_TYPE_RELIEF_STYLE,
GTK_RELIEF_NORMAL,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
props[PROP_ICON_NAME] =
g_param_spec_string ("icon-name",
P_("Icon Name"),
P_("The name of the icon used to automatically populate the button"),
NULL,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, LAST_PROP, props);
g_object_class_override_property (gobject_class, PROP_ACTION_NAME, "action-name");
g_object_class_override_property (gobject_class, PROP_ACTION_TARGET, "action-target");
/**
* GtkButton::clicked:
* @button: the object that received the signal
*
* Emitted when the button has been activated (pressed and released).
*/
button_signals[CLICKED] =
g_signal_new (I_("clicked"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkButtonClass, clicked),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkButton::activate:
* @widget: the object which received the signal.
*
* The ::activate signal on GtkButton is an action signal and
* emitting it causes the button to animate press then release.
* Applications should never connect to this signal, but use the
* #GtkButton::clicked signal.
*/
button_signals[ACTIVATE] =
g_signal_new (I_("activate"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkButtonClass, activate),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
widget_class->activate_signal = button_signals[ACTIVATE];
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_BUTTON_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, "button");
}
static void
multipress_pressed_cb (GtkGestureMultiPress *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if (gtk_widget_get_focus_on_click (widget) && !gtk_widget_has_focus (widget))
gtk_widget_grab_focus (widget);
priv->in_button = TRUE;
if (!priv->activate_timeout)
{
priv->button_down = TRUE;
gtk_button_update_state (button);
}
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
}
static gboolean
touch_release_in_button (GtkButton *button)
{
GtkButtonPrivate *priv;
gint width, height;
GdkEvent *event;
gdouble x, y;
priv = button->priv;
event = gtk_get_current_event ();
if (!event)
return FALSE;
if (event->type != GDK_TOUCH_END ||
event->touch.window != priv->event_window)
{
gdk_event_free (event);
return FALSE;
}
gdk_event_get_coords (event, &x, &y);
width = gdk_window_get_width (priv->event_window);
height = gdk_window_get_height (priv->event_window);
gdk_event_free (event);
if (x >= 0 && x <= width &&
y >= 0 && y <= height)
return TRUE;
return FALSE;
}
static void
multipress_released_cb (GtkGestureMultiPress *gesture,
guint n_press,
gdouble x,
gdouble y,
GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
GdkEventSequence *sequence;
gtk_button_do_release (button,
gtk_widget_is_sensitive (GTK_WIDGET (button)) &&
(button->priv->in_button ||
touch_release_in_button (button)));
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
if (sequence)
{
priv->in_button = FALSE;
gtk_button_update_state (button);
}
}
static void
multipress_gesture_update_cb (GtkGesture *gesture,
GdkEventSequence *sequence,
GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
GtkAllocation allocation;
gboolean in_button;
gdouble x, y;
if (sequence != gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture)))
return;
gtk_widget_get_allocation (GTK_WIDGET (button), &allocation);
gtk_gesture_get_point (gesture, sequence, &x, &y);
in_button = (x >= 0 && y >= 0 && x < allocation.width && y < allocation.height);
if (priv->in_button != in_button)
{
priv->in_button = in_button;
gtk_button_update_state (button);
}
}
static void
multipress_gesture_cancel_cb (GtkGesture *gesture,
GdkEventSequence *sequence,
GtkButton *button)
{
gtk_button_do_release (button, FALSE);
}
static void
gtk_button_init (GtkButton *button)
{
GtkButtonPrivate *priv;
button->priv = gtk_button_get_instance_private (button);
priv = button->priv;
gtk_widget_set_can_focus (GTK_WIDGET (button), TRUE);
gtk_widget_set_receives_default (GTK_WIDGET (button), TRUE);
gtk_widget_set_has_window (GTK_WIDGET (button), FALSE);
priv->label_text = NULL;
priv->constructed = FALSE;
priv->in_button = FALSE;
priv->button_down = FALSE;
priv->use_underline = FALSE;
priv->gesture = gtk_gesture_multi_press_new (GTK_WIDGET (button));
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->gesture), FALSE);
gtk_gesture_single_set_exclusive (GTK_GESTURE_SINGLE (priv->gesture), TRUE);
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->gesture), GDK_BUTTON_PRIMARY);
g_signal_connect (priv->gesture, "pressed", G_CALLBACK (multipress_pressed_cb), button);
g_signal_connect (priv->gesture, "released", G_CALLBACK (multipress_released_cb), button);
g_signal_connect (priv->gesture, "update", G_CALLBACK (multipress_gesture_update_cb), button);
g_signal_connect (priv->gesture, "cancel", G_CALLBACK (multipress_gesture_cancel_cb), button);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->gesture), GTK_PHASE_BUBBLE);
priv->gadget = gtk_css_custom_gadget_new_for_node (gtk_widget_get_css_node (GTK_WIDGET (button)),
GTK_WIDGET (button),
gtk_button_measure,
gtk_button_allocate,
NULL,
NULL,
NULL);
}
static void
gtk_button_finalize (GObject *object)
{
GtkButton *button = GTK_BUTTON (object);
GtkButtonPrivate *priv = button->priv;
g_clear_pointer (&priv->label_text, g_free);
g_clear_object (&priv->gesture);
g_clear_object (&priv->gadget);
G_OBJECT_CLASS (gtk_button_parent_class)->finalize (object);
}
static void
gtk_button_dispose (GObject *object)
{
GtkButton *button = GTK_BUTTON (object);
GtkButtonPrivate *priv = button->priv;
g_clear_object (&priv->action_helper);
G_OBJECT_CLASS (gtk_button_parent_class)->dispose (object);
}
static void
gtk_button_set_action_name (GtkActionable *actionable,
const gchar *action_name)
{
GtkButton *button = GTK_BUTTON (actionable);
if (!button->priv->action_helper)
button->priv->action_helper = gtk_action_helper_new (actionable);
g_signal_handlers_disconnect_by_func (button, gtk_real_button_clicked, NULL);
if (action_name)
g_signal_connect_after (button, "clicked", G_CALLBACK (gtk_real_button_clicked), NULL);
gtk_action_helper_set_action_name (button->priv->action_helper, action_name);
}
static void
gtk_button_set_action_target_value (GtkActionable *actionable,
GVariant *action_target)
{
GtkButton *button = GTK_BUTTON (actionable);
if (!button->priv->action_helper)
button->priv->action_helper = gtk_action_helper_new (actionable);
gtk_action_helper_set_action_target_value (button->priv->action_helper, action_target);
}
static void
gtk_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkButton *button = GTK_BUTTON (object);
switch (prop_id)
{
case PROP_LABEL:
gtk_button_set_label (button, g_value_get_string (value));
break;
case PROP_RELIEF:
gtk_button_set_relief (button, g_value_get_enum (value));
break;
case PROP_USE_UNDERLINE:
gtk_button_set_use_underline (button, g_value_get_boolean (value));
break;
case PROP_ICON_NAME:
gtk_button_set_icon_name (button, g_value_get_string (value));
break;
case PROP_ACTION_NAME:
gtk_button_set_action_name (GTK_ACTIONABLE (button), g_value_get_string (value));
break;
case PROP_ACTION_TARGET:
gtk_button_set_action_target_value (GTK_ACTIONABLE (button), g_value_get_variant (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkButton *button = GTK_BUTTON (object);
GtkButtonPrivate *priv = button->priv;
switch (prop_id)
{
case PROP_LABEL:
g_value_set_string (value, priv->label_text);
break;
case PROP_RELIEF:
g_value_set_enum (value, gtk_button_get_relief (button));
break;
case PROP_USE_UNDERLINE:
g_value_set_boolean (value, priv->use_underline);
break;
case PROP_ICON_NAME:
g_value_set_string (value, gtk_button_get_icon_name (button));
break;
case PROP_ACTION_NAME:
g_value_set_string (value, gtk_action_helper_get_action_name (priv->action_helper));
break;
case PROP_ACTION_TARGET:
g_value_set_variant (value, gtk_action_helper_get_action_target_value (priv->action_helper));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static const gchar *
gtk_button_get_action_name (GtkActionable *actionable)
{
GtkButton *button = GTK_BUTTON (actionable);
return gtk_action_helper_get_action_name (button->priv->action_helper);
}
static GVariant *
gtk_button_get_action_target_value (GtkActionable *actionable)
{
GtkButton *button = GTK_BUTTON (actionable);
return gtk_action_helper_get_action_target_value (button->priv->action_helper);
}
static void
gtk_button_actionable_iface_init (GtkActionableInterface *iface)
{
iface->get_action_name = gtk_button_get_action_name;
iface->set_action_name = gtk_button_set_action_name;
iface->get_action_target_value = gtk_button_get_action_target_value;
iface->set_action_target_value = gtk_button_set_action_target_value;
}
/**
* gtk_button_new:
*
* Creates a new #GtkButton widget. To add a child widget to the button,
* use gtk_container_add().
*
* Returns: The newly created #GtkButton widget.
*/
GtkWidget*
gtk_button_new (void)
{
return g_object_new (GTK_TYPE_BUTTON, NULL);
}
/**
* gtk_button_new_with_label:
* @label: The text you want the #GtkLabel to hold.
*
* Creates a #GtkButton widget with a #GtkLabel child containing the given
* text.
*
* Returns: The newly created #GtkButton widget.
*/
GtkWidget*
gtk_button_new_with_label (const gchar *label)
{
return g_object_new (GTK_TYPE_BUTTON, "label", label, NULL);
}
/**
* gtk_button_new_from_icon_name:
* @icon_name: an icon name
* @size: (type int): an icon size (#GtkIconSize)
*
* Creates a new button containing an icon from the current icon theme.
*
* If the icon name isn’t known, a “broken image” icon will be
* displayed instead. If the current icon theme is changed, the icon
* will be updated appropriately.
*
* This function is a convenience wrapper around gtk_button_new() and
* gtk_button_set_image().
*
* Returns: a new #GtkButton displaying the themed icon
*
* Since: 3.10
*/
GtkWidget*
gtk_button_new_from_icon_name (const gchar *icon_name,
GtkIconSize size)
{
GtkWidget *button;
GtkWidget *image;
image = gtk_image_new_from_icon_name (icon_name, size);
button = g_object_new (GTK_TYPE_BUTTON, NULL);
gtk_container_add (GTK_CONTAINER (button), image);
return button;
}
/**
* gtk_button_new_with_mnemonic:
* @label: The text of the button, with an underscore in front of the
* mnemonic character
*
* Creates a new #GtkButton containing a label.
* If characters in @label are preceded by an underscore, they are underlined.
* If you need a literal underscore character in a label, use “__” (two
* underscores). The first underlined character represents a keyboard
* accelerator called a mnemonic.
* Pressing Alt and that key activates the button.
*
* Returns: a new #GtkButton
*/
GtkWidget*
gtk_button_new_with_mnemonic (const gchar *label)
{
return g_object_new (GTK_TYPE_BUTTON, "label", label, "use-underline", TRUE, NULL);
}
/**
* gtk_button_clicked:
* @button: The #GtkButton you want to send the signal to.
*
* Emits a #GtkButton::clicked signal to the given #GtkButton.
*/
void
gtk_button_clicked (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[CLICKED], 0);
}
/**
* gtk_button_set_relief:
* @button: The #GtkButton you want to set relief styles of
* @relief: The GtkReliefStyle as described above
*
* Sets the relief style of the edges of the given #GtkButton widget.
* Two styles exist, %GTK_RELIEF_NORMAL and %GTK_RELIEF_NONE.
* The default style is, as one can guess, %GTK_RELIEF_NORMAL.
* The deprecated value %GTK_RELIEF_HALF behaves the same as
* %GTK_RELIEF_NORMAL.
*/
void
gtk_button_set_relief (GtkButton *button,
GtkReliefStyle relief)
{
GtkStyleContext *context;
GtkReliefStyle old_relief;
g_return_if_fail (GTK_IS_BUTTON (button));
old_relief = gtk_button_get_relief (button);
if (old_relief != relief)
{
context = gtk_widget_get_style_context (GTK_WIDGET (button));
if (relief == GTK_RELIEF_NONE)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_FLAT);
else
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_FLAT);
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_RELIEF]);
}
}
/**
* gtk_button_get_relief:
* @button: The #GtkButton you want the #GtkReliefStyle from.
*
* Returns the current relief style of the given #GtkButton.
*
* Returns: The current #GtkReliefStyle
*/
GtkReliefStyle
gtk_button_get_relief (GtkButton *button)
{
GtkStyleContext *context;
g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_RELIEF_NORMAL);
context = gtk_widget_get_style_context (GTK_WIDGET (button));
if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_FLAT))
return GTK_RELIEF_NONE;
else
return GTK_RELIEF_NORMAL;
}
static void
gtk_button_realize (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
GtkAllocation allocation;
GdkWindow *window;
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_set_realized (widget, TRUE);
window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, window);
g_object_ref (window);
priv->event_window = gdk_window_new_input (window,
gtk_widget_get_events (widget)
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_TOUCH_MASK
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK,
&allocation);
gtk_widget_register_window (widget, priv->event_window);
}
static void
gtk_button_unrealize (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if (priv->activate_timeout)
gtk_button_finish_activate (button, FALSE);
if (priv->event_window)
{
gtk_widget_unregister_window (widget, priv->event_window);
gdk_window_destroy (priv->event_window);
priv->event_window = NULL;
}
GTK_WIDGET_CLASS (gtk_button_parent_class)->unrealize (widget);
}
static void
gtk_button_map (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
GTK_WIDGET_CLASS (gtk_button_parent_class)->map (widget);
if (priv->event_window)
gdk_window_show (priv->event_window);
}
static void
gtk_button_unmap (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if (priv->event_window)
{
gdk_window_hide (priv->event_window);
priv->in_button = FALSE;
}
GTK_WIDGET_CLASS (gtk_button_parent_class)->unmap (widget);
}
static void
gtk_button_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
GtkAllocation clip;
gtk_widget_set_allocation (widget, allocation);
gtk_css_gadget_allocate (priv->gadget,
allocation,
gtk_widget_get_allocated_baseline (widget),
&clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_button_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer unused)
{
GtkWidget *widget;
GtkWidget *child;
widget = gtk_css_gadget_get_owner (gadget);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
gtk_widget_size_allocate_with_baseline (child, (GtkAllocation *)allocation, baseline);
if (gtk_widget_get_realized (widget))
{
GtkAllocation border_allocation;
gtk_css_gadget_get_border_allocation (gadget, &border_allocation, NULL);
gdk_window_move_resize (GTK_BUTTON (widget)->priv->event_window,
border_allocation.x,
border_allocation.y,
border_allocation.width,
border_allocation.height);
}
gtk_container_get_children_clip (GTK_CONTAINER (widget), out_clip);
}
static GskRenderNode *
gtk_button_get_render_node (GtkWidget *widget,
GskRenderer *renderer)
{
GskRenderNode *res = gtk_css_gadget_get_render_node (GTK_BUTTON (widget)->priv->gadget,
renderer,
gtk_widget_has_visible_focus (widget));
if (res == NULL)
return NULL;
gtk_container_propagate_render_node (GTK_CONTAINER (widget), renderer, res);
return res;
}
static void
gtk_button_do_release (GtkButton *button,
gboolean emit_clicked)
{
GtkButtonPrivate *priv = button->priv;
if (priv->button_down)
{
priv->button_down = FALSE;
if (priv->activate_timeout)
return;
if (emit_clicked)
gtk_button_clicked (button);
gtk_button_update_state (button);
}
}
static gboolean
gtk_button_grab_broken (GtkWidget *widget,
GdkEventGrabBroken *event)
{
GtkButton *button = GTK_BUTTON (widget);
gtk_button_do_release (button, FALSE);
return TRUE;
}
static gboolean
gtk_button_key_release (GtkWidget *widget,
GdkEventKey *event)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if (priv->activate_timeout)
{
gtk_button_finish_activate (button, TRUE);
return TRUE;
}
else if (GTK_WIDGET_CLASS (gtk_button_parent_class)->key_release_event)
return GTK_WIDGET_CLASS (gtk_button_parent_class)->key_release_event (widget, event);
else
return FALSE;
}
static gboolean
gtk_button_enter_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if ((event->window == button->priv->event_window) &&
(event->detail != GDK_NOTIFY_INFERIOR))
{
priv->in_button = TRUE;
gtk_button_update_state (button);
}
return FALSE;
}
static gboolean
gtk_button_leave_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if ((event->window == button->priv->event_window) &&
(event->detail != GDK_NOTIFY_INFERIOR))
{
priv->in_button = FALSE;
gtk_button_update_state (button);
}
return FALSE;
}
static void
gtk_real_button_clicked (GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
if (priv->action_helper)
gtk_action_helper_activate (priv->action_helper);
}
static gboolean
button_activate_timeout (gpointer data)
{
gtk_button_finish_activate (data, TRUE);
return FALSE;
}
static void
gtk_real_button_activate (GtkButton *button)
{
GtkWidget *widget = GTK_WIDGET (button);
GtkButtonPrivate *priv = button->priv;
GdkDevice *device;
guint32 time;
device = gtk_get_current_event_device ();
if (device && gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
device = gdk_device_get_associated_device (device);
if (gtk_widget_get_realized (widget) && !priv->activate_timeout)
{
time = gtk_get_current_event_time ();
/* bgo#626336 - Only grab if we have a device (from an event), not if we
* were activated programmatically when no event is available.
*/
if (device && gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
{
if (gdk_seat_grab (gdk_device_get_seat (device), priv->event_window,
GDK_SEAT_CAPABILITY_KEYBOARD, TRUE,
NULL, NULL, NULL, NULL) == GDK_GRAB_SUCCESS)
{
gtk_device_grab_add (widget, device, TRUE);
priv->grab_keyboard = device;
priv->grab_time = time;
}
}
priv->activate_timeout = gdk_threads_add_timeout (ACTIVATE_TIMEOUT,
button_activate_timeout,
button);
g_source_set_name_by_id (priv->activate_timeout, "[gtk+] button_activate_timeout");
priv->button_down = TRUE;
gtk_button_update_state (button);
}
}
static void
gtk_button_finish_activate (GtkButton *button,
gboolean do_it)
{
GtkWidget *widget = GTK_WIDGET (button);
GtkButtonPrivate *priv = button->priv;
g_source_remove (priv->activate_timeout);
priv->activate_timeout = 0;
if (priv->grab_keyboard)
{
gdk_seat_ungrab (gdk_device_get_seat (priv->grab_keyboard));
gtk_device_grab_remove (widget, priv->grab_keyboard);
priv->grab_keyboard = NULL;
}
priv->button_down = FALSE;
gtk_button_update_state (button);
if (do_it)
gtk_button_clicked (button);
}
static void
gtk_button_measure (GtkCssGadget *gadget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline,
gpointer data)
{
GtkWidget *widget;
GtkWidget *child;
widget = gtk_css_gadget_get_owner (gadget);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
{
_gtk_widget_get_preferred_size_for_size (child,
orientation,
for_size,
minimum, natural,
minimum_baseline, natural_baseline);
}
else
{
*minimum = 0;
*natural = 0;
if (minimum_baseline)
*minimum_baseline = 0;
if (natural_baseline)
*natural_baseline = 0;
}
}
static void
gtk_button_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_BUTTON (widget)->priv->gadget,
GTK_ORIENTATION_HORIZONTAL,
-1,
minimum_size, natural_size,
NULL, NULL);
}
static void
gtk_button_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_BUTTON (widget)->priv->gadget,
GTK_ORIENTATION_VERTICAL,
-1,
minimum_size, natural_size,
NULL, NULL);
}
static void
gtk_button_get_preferred_width_for_height (GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_BUTTON (widget)->priv->gadget,
GTK_ORIENTATION_HORIZONTAL,
for_size,
minimum_size, natural_size,
NULL, NULL);
}
static void
gtk_button_get_preferred_height_for_width (GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_BUTTON (widget)->priv->gadget,
GTK_ORIENTATION_VERTICAL,
for_size,
minimum_size, natural_size,
NULL, NULL);
}
static void
gtk_button_get_preferred_height_and_baseline_for_width (GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size,
gint *minimum_baseline,
gint *natural_baseline)
{
gtk_css_gadget_get_preferred_size (GTK_BUTTON (widget)->priv->gadget,
GTK_ORIENTATION_VERTICAL,
for_size,
minimum_size, natural_size,
minimum_baseline, natural_baseline);
}
/**
* gtk_button_set_label:
* @button: a #GtkButton
* @label: a string
*
* Sets the text of the label of the button to @label.
*
* This will also clear any previously set labels.
*/
void
gtk_button_set_label (GtkButton *button,
const gchar *label)
{
GtkButtonPrivate *priv = gtk_button_get_instance_private (button);
GtkWidget *child;
GtkStyleContext *context;
g_return_if_fail (GTK_IS_BUTTON (button));
context = gtk_widget_get_style_context (GTK_WIDGET (button));
g_free (priv->label_text);
priv->label_text = g_strdup (label);
child = gtk_bin_get_child (GTK_BIN (button));
if (child != NULL)
{
if (!priv->constructed || !GTK_IS_LABEL (child))
{
gtk_container_remove (GTK_CONTAINER (button), child);
}
else
{
gtk_label_set_label (GTK_LABEL (child), label);
return;
}
}
gtk_style_context_remove_class (context, "image-button");
gtk_style_context_add_class (context, "text-button");
if (label != NULL)
{
child = gtk_label_new (label);
gtk_label_set_use_underline (GTK_LABEL (child), priv->use_underline);
gtk_widget_show (child);
gtk_container_add (GTK_CONTAINER (button), child);
priv->constructed = TRUE;
}
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_LABEL]);
}
/**
* gtk_button_get_label:
* @button: a #GtkButton
*
* Fetches the text from the label of the button, as set by
* gtk_button_set_label(). If the label text has not
* been set the return value will be %NULL. This will be the
* case if you create an empty button with gtk_button_new() to
* use as a container.
*
* Returns: (nullable): The text of the label widget. This string is owned
* by the widget and must not be modified or freed.
*/
const gchar *
gtk_button_get_label (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
return button->priv->label_text;
}
/**
* gtk_button_set_use_underline:
* @button: a #GtkButton
* @use_underline: %TRUE if underlines in the text indicate mnemonics
*
* If true, an underline in the text of the button label indicates
* the next character should be used for the mnemonic accelerator key.
*/
void
gtk_button_set_use_underline (GtkButton *button,
gboolean use_underline)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = button->priv;
use_underline = use_underline != FALSE;
if (use_underline != priv->use_underline)
{
priv->use_underline = use_underline;
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_USE_UNDERLINE]);
}
if (priv->constructed)
{
GtkWidget *child;
child = gtk_bin_get_child (GTK_BIN (button));
if (child != NULL && GTK_IS_LABEL (child))
{
gtk_label_set_use_underline (GTK_LABEL (child), use_underline);
gtk_label_set_mnemonic_widget (GTK_LABEL (child), GTK_WIDGET (button));
}
}
}
/**
* gtk_button_get_use_underline:
* @button: a #GtkButton
*
* Returns whether an embedded underline in the button label indicates a
* mnemonic. See gtk_button_set_use_underline ().
*
* Returns: %TRUE if an embedded underline in the button label
* indicates the mnemonic accelerator keys.
*/
gboolean
gtk_button_get_use_underline (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
return button->priv->use_underline;
}
static void
gtk_button_update_state (GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
GtkStateFlags new_state;
gboolean depressed;
if (priv->activate_timeout)
depressed = TRUE;
else
depressed = priv->in_button && priv->button_down;
new_state = gtk_widget_get_state_flags (GTK_WIDGET (button)) &
~(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_ACTIVE);
if (priv->in_button)
new_state |= GTK_STATE_FLAG_PRELIGHT;
if (depressed)
new_state |= GTK_STATE_FLAG_ACTIVE;
gtk_widget_set_state_flags (GTK_WIDGET (button), new_state, TRUE);
}
static void
gtk_button_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
GtkButton *button;
GtkButtonPrivate *priv;
if (!gtk_widget_has_screen (widget))
return;
button = GTK_BUTTON (widget);
priv = button->priv;
/* If the button is being pressed while the screen changes the
release might never occur, so we reset the state. */
if (priv->button_down)
{
priv->button_down = FALSE;
gtk_button_update_state (button);
}
}
static void
gtk_button_state_changed (GtkWidget *widget,
GtkStateType previous_state)
{
GtkButton *button = GTK_BUTTON (widget);
if (!gtk_widget_is_sensitive (widget))
gtk_button_do_release (button, FALSE);
}
static void
gtk_button_grab_notify (GtkWidget *widget,
gboolean was_grabbed)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if (priv->activate_timeout &&
priv->grab_keyboard &&
gtk_widget_device_is_shadowed (widget, priv->grab_keyboard))
gtk_button_finish_activate (button, FALSE);
if (!was_grabbed)
gtk_button_do_release (button, FALSE);
}
/**
* gtk_button_get_event_window:
* @button: a #GtkButton
*
* Returns the button’s event window if it is realized, %NULL otherwise.
* This function should be rarely needed.
*
* Returns: (transfer none): @button’s event window.
*
* Since: 2.22
*/
GdkWindow*
gtk_button_get_event_window (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
return button->priv->event_window;
}
/**
* gtk_button_set_icon_name:
*
*/
void
gtk_button_set_icon_name (GtkButton *button,
const char *icon_name)
{
GtkButtonPrivate *priv = gtk_button_get_instance_private (button);
GtkWidget *child;
GtkStyleContext *context;
g_return_if_fail (GTK_IS_BUTTON (button));
g_return_if_fail (icon_name != NULL);
child = gtk_bin_get_child (GTK_BIN (button));
context = gtk_widget_get_style_context (GTK_WIDGET (button));
if (child != NULL)
{
if (!priv->constructed || !GTK_IS_IMAGE (child))
{
gtk_container_remove (GTK_CONTAINER (button), child);
}
else
{
gtk_image_set_from_icon_name (GTK_IMAGE (child), icon_name, GTK_ICON_SIZE_BUTTON);
return;
}
}
gtk_style_context_remove_class (context, "text-button");
gtk_style_context_add_class (context, "image-button");
child = gtk_image_new_from_icon_name (icon_name, GTK_ICON_SIZE_BUTTON);
gtk_widget_show (child);
gtk_container_add (GTK_CONTAINER (button), child);
priv->constructed = TRUE;
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_ICON_NAME]);
}
/**
* gtk_button_get_icon_name:
* @button: A #GtkButton
*
* Returns: (nullable): The icon name set via gtk_button_set_icon_name
*/
const char *
gtk_button_get_icon_name (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
if (button->priv->constructed)
{
GtkWidget *child = gtk_bin_get_child (GTK_BIN (button));
if (GTK_IS_IMAGE (child))
{
const char *icon_name;
gtk_image_get_icon_name (GTK_IMAGE (child), &icon_name, NULL);
return icon_name;
}
}
return NULL;
}
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