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gtk2/gtk/gtkbutton.c
Carlos Garnacho ea830aee5d button: Track gesture point to maintain priv->in_button 
This makes the active state work invariably with both mouse/touch, and
regardless of X11 pointer emulation being friendly and sending crossing
events for the emulated pointer events in the latter.

This makes GtkButtons' active state look correct when pressing on
touchscreens on wayland.

https://bugzilla.gnome.org/show_bug.cgi?id=731380
2014-08-26 23:21:24 +02:00

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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.
*/
#include "config.h"
#include "gtkbutton.h"
#include "gtkbuttonprivate.h"
#include <string.h>
#include "deprecated/gtkalignment.h"
#include "gtklabel.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkimage.h"
#include "gtkbox.h"
#include "deprecated/gtkstock.h"
#include "deprecated/gtkactivatable.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"
static const GtkBorder default_default_border = { 0, 0, 0, 0 };
static const GtkBorder default_default_outside_border = { 0, 0, 0, 0 };
/* Time out before giving up on getting a key release when animating
* the close button.
*/
#define ACTIVATE_TIMEOUT 250
enum {
PRESSED,
RELEASED,
CLICKED,
ENTER,
LEAVE,
ACTIVATE,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_LABEL,
PROP_IMAGE,
PROP_RELIEF,
PROP_USE_UNDERLINE,
PROP_USE_STOCK,
PROP_FOCUS_ON_CLICK,
PROP_XALIGN,
PROP_YALIGN,
PROP_IMAGE_POSITION,
PROP_ALWAYS_SHOW_IMAGE,
/* actionable properties */
PROP_ACTION_NAME,
PROP_ACTION_TARGET,
/* activatable properties */
PROP_ACTIVATABLE_RELATED_ACTION,
PROP_ACTIVATABLE_USE_ACTION_APPEARANCE,
LAST_PROP = PROP_ACTION_NAME
};
static void gtk_button_destroy (GtkWidget *widget);
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_style_updated (GtkWidget * widget);
static void gtk_button_size_allocate (GtkWidget * widget,
GtkAllocation * allocation);
static gint gtk_button_draw (GtkWidget * widget, cairo_t *cr);
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_pressed (GtkButton * button);
static void gtk_real_button_released (GtkButton * button);
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_enter_leave (GtkButton *button);
static void gtk_button_add (GtkContainer *container,
GtkWidget *widget);
static GType gtk_button_child_type (GtkContainer *container);
static void gtk_button_finish_activate (GtkButton *button,
gboolean do_it);
static void gtk_button_constructed (GObject *object);
static void gtk_button_construct_child (GtkButton *button);
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_actionable_iface_init (GtkActionableInterface *iface);
static void gtk_button_activatable_interface_init(GtkActivatableIface *iface);
static void gtk_button_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name);
static void gtk_button_sync_action_properties (GtkActivatable *activatable,
GtkAction *action);
static void gtk_button_set_related_action (GtkButton *button,
GtkAction *action);
static void gtk_button_set_use_action_appearance (GtkButton *button,
gboolean use_appearance);
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 GParamSpec *props[LAST_PROP] = { NULL, };
static guint button_signals[LAST_SIGNAL] = { 0 };
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
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)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACTIVATABLE,
gtk_button_activatable_interface_init))
G_GNUC_END_IGNORE_DEPRECATIONS;
static void
gtk_button_class_init (GtkButtonClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = G_OBJECT_CLASS (klass);
widget_class = (GtkWidgetClass*) klass;
container_class = (GtkContainerClass*) klass;
gobject_class->constructed = gtk_button_constructed;
gobject_class->dispose = gtk_button_dispose;
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->destroy = gtk_button_destroy;
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->style_updated = gtk_button_style_updated;
widget_class->size_allocate = gtk_button_size_allocate;
widget_class->draw = gtk_button_draw;
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;
container_class->child_type = gtk_button_child_type;
container_class->add = gtk_button_add;
gtk_container_class_handle_border_width (container_class);
klass->pressed = gtk_real_button_pressed;
klass->released = gtk_real_button_released;
klass->clicked = NULL;
klass->enter = gtk_button_enter_leave;
klass->leave = gtk_button_enter_leave;
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_CONSTRUCT|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_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkButton:use-stock:
*
* Deprecated: 3.10
*/
props[PROP_USE_STOCK] =
g_param_spec_boolean ("use-stock",
P_("Use stock"),
P_("If set, the label is used to pick a stock item instead of being displayed"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY|G_PARAM_DEPRECATED);
props[PROP_FOCUS_ON_CLICK] =
g_param_spec_boolean ("focus-on-click",
P_("Focus on click"),
P_("Whether the button grabs focus when it is clicked with the mouse"),
TRUE,
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);
/**
* GtkButton:xalign:
*
* If the child of the button is a #GtkMisc or #GtkAlignment, this property
* can be used to control its horizontal alignment. 0.0 is left aligned,
* 1.0 is right aligned.
*
* Since: 2.4
*
* Deprecated: 3.14: Access the child widget directly if you need to control
* its alignment.
*/
props[PROP_XALIGN] =
g_param_spec_float ("xalign",
P_("Horizontal alignment for child"),
P_("Horizontal position of child in available space. 0.0 is left aligned, 1.0 is right aligned"),
0.0, 1.0, 0.5,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY|G_PARAM_DEPRECATED);
/**
* GtkButton:yalign:
*
* If the child of the button is a #GtkMisc or #GtkAlignment, this property
* can be used to control its vertical alignment. 0.0 is top aligned,
* 1.0 is bottom aligned.
*
* Since: 2.4
*
* Deprecated: 3.14: Access the child widget directly if you need to control
* its alignment.
*/
props[PROP_YALIGN] =
g_param_spec_float ("yalign",
P_("Vertical alignment for child"),
P_("Vertical position of child in available space. 0.0 is top aligned, 1.0 is bottom aligned"),
0.0, 1.0, 0.5,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY|G_PARAM_DEPRECATED);
/**
* GtkButton:image:
*
* The child widget to appear next to the button text.
*
* Since: 2.6
*/
props[PROP_IMAGE] =
g_param_spec_object ("image",
P_("Image widget"),
P_("Child widget to appear next to the button text"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkButton:image-position:
*
* The position of the image relative to the text inside the button.
*
* Since: 2.10
*/
props[PROP_IMAGE_POSITION] =
g_param_spec_enum ("image-position",
P_("Image position"),
P_("The position of the image relative to the text"),
GTK_TYPE_POSITION_TYPE,
GTK_POS_LEFT,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkButton:always-show-image:
*
* If %TRUE, the button will ignore the #GtkSettings:gtk-button-images
* setting and always show the image, if available.
*
* Use this property if the button would be useless or hard to use
* without the image.
*
* Since: 3.6
*/
props[PROP_ALWAYS_SHOW_IMAGE] =
g_param_spec_boolean ("always-show-image",
P_("Always show image"),
P_("Whether the image will always be shown"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|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");
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
g_object_class_override_property (gobject_class, PROP_ACTIVATABLE_RELATED_ACTION, "related-action");
g_object_class_override_property (gobject_class, PROP_ACTIVATABLE_USE_ACTION_APPEARANCE, "use-action-appearance");
G_GNUC_END_IGNORE_DEPRECATIONS;
/**
* GtkButton::pressed:
* @button: the object that received the signal
*
* Emitted when the button is pressed.
*
* Deprecated: 2.8: Use the #GtkWidget::button-press-event signal.
*/
button_signals[PRESSED] =
g_signal_new (I_("pressed"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkButtonClass, pressed),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkButton::released:
* @button: the object that received the signal
*
* Emitted when the button is released.
*
* Deprecated: 2.8: Use the #GtkWidget::button-release-event signal.
*/
button_signals[RELEASED] =
g_signal_new (I_("released"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkButtonClass, released),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* 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,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkButton::enter:
* @button: the object that received the signal
*
* Emitted when the pointer enters the button.
*
* Deprecated: 2.8: Use the #GtkWidget::enter-notify-event signal.
*/
button_signals[ENTER] =
g_signal_new (I_("enter"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkButtonClass, enter),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkButton::leave:
* @button: the object that received the signal
*
* Emitted when the pointer leaves the button.
*
* Deprecated: 2.8: Use the #GtkWidget::leave-notify-event signal.
*/
button_signals[LEAVE] =
g_signal_new (I_("leave"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkButtonClass, leave),
NULL, NULL,
_gtk_marshal_VOID__VOID,
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,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_class->activate_signal = button_signals[ACTIVATE];
/**
* GtkButton:default-border:
*
* The "default-border" style property defines the extra space to add
* around a button that can become the default widget of its window.
* For more information about default widgets, see gtk_widget_grab_default().
*
* Deprecated: 3.14: use CSS margins and padding instead.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boxed ("default-border",
P_("Default Spacing"),
P_("Extra space to add for GTK_CAN_DEFAULT buttons"),
GTK_TYPE_BORDER,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkButton:default-outside-border:
*
* The "default-outside-border" style property defines the extra outside
* space to add around a button that can become the default widget of its
* window. Extra outside space is always drawn outside the button border.
* For more information about default widgets, see gtk_widget_grab_default().
*
* Deprecated: 3.14: use CSS margins and padding instead.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boxed ("default-outside-border",
P_("Default Outside Spacing"),
P_("Extra space to add for GTK_CAN_DEFAULT buttons that is always drawn outside the border"),
GTK_TYPE_BORDER,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("child-displacement-x",
P_("Child X Displacement"),
P_("How far in the x direction to move the child when the button is depressed"),
G_MININT,
G_MAXINT,
0,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("child-displacement-y",
P_("Child Y Displacement"),
P_("How far in the y direction to move the child when the button is depressed"),
G_MININT,
G_MAXINT,
0,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkButton:displace-focus:
*
* Whether the child_displacement_x/child_displacement_y properties
* should also affect the focus rectangle.
*
* Since: 2.6
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boolean ("displace-focus",
P_("Displace focus"),
P_("Whether the child_displacement_x/_y properties should also affect the focus rectangle"),
FALSE,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkButton:inner-border:
*
* Sets the border between the button edges and child.
*
* Since: 2.10
*
* Deprecated: 3.4: Use the standard border and padding CSS properties;
* the value of this style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boxed ("inner-border",
P_("Inner Border"),
P_("Border between button edges and child."),
GTK_TYPE_BORDER,
GTK_PARAM_READABLE | G_PARAM_DEPRECATED));
/**
* GtkButton::image-spacing:
*
* Spacing in pixels between the image and label.
*
* Since: 2.10
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("image-spacing",
P_("Image spacing"),
P_("Spacing in pixels between the image and label"),
0,
G_MAXINT,
2,
GTK_PARAM_READABLE));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_BUTTON_ACCESSIBLE);
}
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 (priv->focus_on_click && !gtk_widget_has_focus (widget))
gtk_widget_grab_focus (widget);
priv->in_button = TRUE;
g_signal_emit (button, button_signals[PRESSED], 0);
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
}
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;
GdkDevice *source;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
source = gdk_event_get_source_device (gtk_gesture_get_last_event (GTK_GESTURE (gesture),
sequence));
if (gdk_device_get_source (source) == GDK_SOURCE_TOUCHSCREEN)
priv->in_button = FALSE;
g_signal_emit (button, button_signals[RELEASED], 0);
}
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
gtk_button_init (GtkButton *button)
{
GtkButtonPrivate *priv;
GtkStyleContext *context;
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_stock = FALSE;
priv->use_underline = FALSE;
priv->focus_on_click = TRUE;
priv->xalign = 0.5;
priv->yalign = 0.5;
priv->align_set = 0;
priv->image_is_stock = TRUE;
priv->image_position = GTK_POS_LEFT;
priv->use_action_appearance = TRUE;
context = gtk_widget_get_style_context (GTK_WIDGET (button));
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
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);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->gesture), GTK_PHASE_BUBBLE);
}
static void
gtk_button_destroy (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
if (priv->label_text)
{
g_free (priv->label_text);
priv->label_text = NULL;
}
g_clear_object (&priv->gesture);
GTK_WIDGET_CLASS (gtk_button_parent_class)->destroy (widget);
}
static void
gtk_button_constructed (GObject *object)
{
GtkButton *button = GTK_BUTTON (object);
GtkButtonPrivate *priv = button->priv;
G_OBJECT_CLASS (gtk_button_parent_class)->constructed (object);
priv->constructed = TRUE;
if (priv->label_text != NULL)
gtk_button_construct_child (button);
}
static GType
gtk_button_child_type (GtkContainer *container)
{
if (!gtk_bin_get_child (GTK_BIN (container)))
return GTK_TYPE_WIDGET;
else
return G_TYPE_NONE;
}
static void
maybe_set_alignment (GtkButton *button,
GtkWidget *widget)
{
GtkButtonPrivate *priv = button->priv;
if (!priv->align_set)
return;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (GTK_IS_MISC (widget))
gtk_misc_set_alignment (GTK_MISC (widget), priv->xalign, priv->yalign);
else if (GTK_IS_ALIGNMENT (widget))
g_object_set (widget, "xalign", priv->xalign, "yalign", priv->yalign, NULL);
G_GNUC_END_IGNORE_DEPRECATIONS
}
static void
gtk_button_add (GtkContainer *container,
GtkWidget *widget)
{
maybe_set_alignment (GTK_BUTTON (container), widget);
GTK_CONTAINER_CLASS (gtk_button_parent_class)->add (container, widget);
}
static void
gtk_button_dispose (GObject *object)
{
GtkButton *button = GTK_BUTTON (object);
GtkButtonPrivate *priv = button->priv;
g_clear_object (&priv->action_helper);
if (priv->action)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (button), NULL);
G_GNUC_END_IGNORE_DEPRECATIONS;
priv->action = NULL;
}
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);
g_return_if_fail (button->priv->action == NULL);
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);
GtkButtonPrivate *priv = button->priv;
switch (prop_id)
{
case PROP_LABEL:
gtk_button_set_label (button, g_value_get_string (value));
break;
case PROP_IMAGE:
gtk_button_set_image (button, (GtkWidget *) g_value_get_object (value));
break;
case PROP_ALWAYS_SHOW_IMAGE:
gtk_button_set_always_show_image (button, g_value_get_boolean (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_USE_STOCK:
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_button_set_use_stock (button, g_value_get_boolean (value));
G_GNUC_END_IGNORE_DEPRECATIONS;
break;
case PROP_FOCUS_ON_CLICK:
gtk_button_set_focus_on_click (button, g_value_get_boolean (value));
break;
case PROP_XALIGN:
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_button_set_alignment (button, g_value_get_float (value), priv->yalign);
G_GNUC_END_IGNORE_DEPRECATIONS
break;
case PROP_YALIGN:
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_button_set_alignment (button, priv->xalign, g_value_get_float (value));
G_GNUC_END_IGNORE_DEPRECATIONS
break;
case PROP_IMAGE_POSITION:
gtk_button_set_image_position (button, g_value_get_enum (value));
break;
case PROP_ACTIVATABLE_RELATED_ACTION:
gtk_button_set_related_action (button, g_value_get_object (value));
break;
case PROP_ACTIVATABLE_USE_ACTION_APPEARANCE:
gtk_button_set_use_action_appearance (button, g_value_get_boolean (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_IMAGE:
g_value_set_object (value, (GObject *)priv->image);
break;
case PROP_ALWAYS_SHOW_IMAGE:
g_value_set_boolean (value, gtk_button_get_always_show_image (button));
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_USE_STOCK:
g_value_set_boolean (value, priv->use_stock);
break;
case PROP_FOCUS_ON_CLICK:
g_value_set_boolean (value, priv->focus_on_click);
break;
case PROP_XALIGN:
g_value_set_float (value, priv->xalign);
break;
case PROP_YALIGN:
g_value_set_float (value, priv->yalign);
break;
case PROP_IMAGE_POSITION:
g_value_set_enum (value, priv->image_position);
break;
case PROP_ACTIVATABLE_RELATED_ACTION:
g_value_set_object (value, priv->action);
break;
case PROP_ACTIVATABLE_USE_ACTION_APPEARANCE:
g_value_set_boolean (value, priv->use_action_appearance);
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;
}
static void
gtk_button_activatable_interface_init (GtkActivatableIface *iface)
{
iface->update = gtk_button_update;
iface->sync_action_properties = gtk_button_sync_action_properties;
}
static void
activatable_update_stock_id (GtkButton *button,
GtkAction *action)
{
gboolean use_stock;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
use_stock = gtk_button_get_use_stock (button);
G_GNUC_END_IGNORE_DEPRECATIONS;
if (!use_stock)
return;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_button_set_label (button, gtk_action_get_stock_id (action));
G_GNUC_END_IGNORE_DEPRECATIONS;
}
static void
activatable_update_short_label (GtkButton *button,
GtkAction *action)
{
GtkWidget *child;
GtkWidget *image;
gboolean use_stock;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
use_stock = gtk_button_get_use_stock (button);
G_GNUC_END_IGNORE_DEPRECATIONS;
if (use_stock)
return;
image = gtk_button_get_image (button);
/* Dont touch custom child... */
child = gtk_bin_get_child (GTK_BIN (button));
if (GTK_IS_IMAGE (image) ||
child == NULL ||
GTK_IS_LABEL (child))
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_button_set_label (button, gtk_action_get_short_label (action));
G_GNUC_END_IGNORE_DEPRECATIONS;
gtk_button_set_use_underline (button, TRUE);
}
}
static void
activatable_update_icon_name (GtkButton *button,
GtkAction *action)
{
GtkWidget *image;
gboolean use_stock;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
use_stock = gtk_button_get_use_stock (button);
G_GNUC_END_IGNORE_DEPRECATIONS;
if (use_stock)
return;
image = gtk_button_get_image (button);
if (GTK_IS_IMAGE (image) &&
(gtk_image_get_storage_type (GTK_IMAGE (image)) == GTK_IMAGE_EMPTY ||
gtk_image_get_storage_type (GTK_IMAGE (image)) == GTK_IMAGE_ICON_NAME))
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_image_set_from_icon_name (GTK_IMAGE (image),
gtk_action_get_icon_name (action), GTK_ICON_SIZE_MENU);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
}
static void
activatable_update_gicon (GtkButton *button,
GtkAction *action)
{
GtkWidget *image = gtk_button_get_image (button);
GIcon *icon;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
icon = gtk_action_get_gicon (action);
G_GNUC_END_IGNORE_DEPRECATIONS;
if (GTK_IS_IMAGE (image) &&
(gtk_image_get_storage_type (GTK_IMAGE (image)) == GTK_IMAGE_EMPTY ||
gtk_image_get_storage_type (GTK_IMAGE (image)) == GTK_IMAGE_GICON))
gtk_image_set_from_gicon (GTK_IMAGE (image), icon, GTK_ICON_SIZE_BUTTON);
}
static void
gtk_button_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name)
{
GtkButton *button = GTK_BUTTON (activatable);
GtkButtonPrivate *priv = button->priv;
if (strcmp (property_name, "visible") == 0)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
if (gtk_action_is_visible (action))
gtk_widget_show (GTK_WIDGET (activatable));
else
gtk_widget_hide (GTK_WIDGET (activatable));
G_GNUC_END_IGNORE_DEPRECATIONS;
}
else if (strcmp (property_name, "sensitive") == 0)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_widget_set_sensitive (GTK_WIDGET (activatable), gtk_action_is_sensitive (action));
G_GNUC_END_IGNORE_DEPRECATIONS;
}
if (!priv->use_action_appearance)
return;
if (strcmp (property_name, "stock-id") == 0)
activatable_update_stock_id (GTK_BUTTON (activatable), action);
else if (strcmp (property_name, "gicon") == 0)
activatable_update_gicon (GTK_BUTTON (activatable), action);
else if (strcmp (property_name, "short-label") == 0)
activatable_update_short_label (GTK_BUTTON (activatable), action);
else if (strcmp (property_name, "icon-name") == 0)
activatable_update_icon_name (GTK_BUTTON (activatable), action);
}
static void
gtk_button_sync_action_properties (GtkActivatable *activatable,
GtkAction *action)
{
GtkButton *button = GTK_BUTTON (activatable);
GtkButtonPrivate *priv = button->priv;
gboolean always_show_image;
if (!action)
return;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (gtk_action_is_visible (action))
gtk_widget_show (GTK_WIDGET (activatable));
else
gtk_widget_hide (GTK_WIDGET (activatable));
gtk_widget_set_sensitive (GTK_WIDGET (activatable), gtk_action_is_sensitive (action));
always_show_image = gtk_action_get_always_show_image (action);
G_GNUC_END_IGNORE_DEPRECATIONS
if (priv->use_action_appearance)
{
activatable_update_stock_id (GTK_BUTTON (activatable), action);
activatable_update_short_label (GTK_BUTTON (activatable), action);
activatable_update_gicon (GTK_BUTTON (activatable), action);
activatable_update_icon_name (GTK_BUTTON (activatable), action);
}
gtk_button_set_always_show_image (button, always_show_image);
}
static void
gtk_button_set_related_action (GtkButton *button,
GtkAction *action)
{
GtkButtonPrivate *priv = button->priv;
g_return_if_fail (gtk_action_helper_get_action_name (button->priv->action_helper) == NULL);
if (priv->action == action)
return;
/* This should be a default handler, but for compatibility reasons
* we need to support derived classes that don't chain up their
* clicked handler.
*/
g_signal_handlers_disconnect_by_func (button, gtk_real_button_clicked, NULL);
if (action)
g_signal_connect_after (button, "clicked",
G_CALLBACK (gtk_real_button_clicked), NULL);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (button), action);
G_GNUC_END_IGNORE_DEPRECATIONS
priv->action = action;
}
static void
gtk_button_set_use_action_appearance (GtkButton *button,
gboolean use_appearance)
{
GtkButtonPrivate *priv = button->priv;
if (priv->use_action_appearance != use_appearance)
{
priv->use_action_appearance = use_appearance;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_activatable_sync_action_properties (GTK_ACTIVATABLE (button), priv->action);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
}
}
/**
* 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);
}
static gboolean
show_image (GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
gboolean show;
if (priv->label_text && !priv->always_show_image)
{
GtkSettings *settings;
settings = gtk_widget_get_settings (GTK_WIDGET (button));
g_object_get (settings, "gtk-button-images", &show, NULL);
}
else
show = TRUE;
return show;
}
static void
gtk_button_construct_child (GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
GtkStyleContext *context;
GtkStockItem item;
GtkWidget *child;
GtkWidget *label;
GtkWidget *box;
GtkWidget *align;
GtkWidget *image = NULL;
gchar *label_text = NULL;
gint image_spacing;
context = gtk_widget_get_style_context (GTK_WIDGET (button));
gtk_style_context_remove_class (context, "image-button");
gtk_style_context_remove_class (context, "text-button");
if (!priv->constructed)
return;
if (!priv->label_text && !priv->image)
return;
gtk_style_context_get_style (context,
"image-spacing", &image_spacing,
NULL);
if (priv->image && !priv->image_is_stock)
{
GtkWidget *parent;
image = g_object_ref (priv->image);
parent = gtk_widget_get_parent (image);
if (parent)
gtk_container_remove (GTK_CONTAINER (parent), image);
}
priv->image = NULL;
child = gtk_bin_get_child (GTK_BIN (button));
if (child)
gtk_container_remove (GTK_CONTAINER (button), child);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
if (priv->use_stock &&
priv->label_text &&
gtk_stock_lookup (priv->label_text, &item))
{
if (!image)
image = g_object_ref (gtk_image_new_from_stock (priv->label_text, GTK_ICON_SIZE_BUTTON));
label_text = item.label;
}
else
label_text = priv->label_text;
G_GNUC_END_IGNORE_DEPRECATIONS;
if (image)
{
priv->image = image;
g_object_set (priv->image,
"visible", show_image (button),
"no-show-all", TRUE,
NULL);
if (priv->image_position == GTK_POS_LEFT ||
priv->image_position == GTK_POS_RIGHT)
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, image_spacing);
else
box = gtk_box_new (GTK_ORIENTATION_VERTICAL, image_spacing);
gtk_widget_set_valign (image, GTK_ALIGN_BASELINE);
gtk_widget_set_valign (box, GTK_ALIGN_BASELINE);
if (priv->align_set)
align = gtk_alignment_new (priv->xalign, priv->yalign, 0.0, 0.0);
else
align = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_widget_set_valign (align, GTK_ALIGN_BASELINE);
if (priv->image_position == GTK_POS_LEFT ||
priv->image_position == GTK_POS_TOP)
gtk_box_pack_start (GTK_BOX (box), priv->image, FALSE, FALSE, 0);
else
gtk_box_pack_end (GTK_BOX (box), priv->image, FALSE, FALSE, 0);
if (label_text)
{
if (priv->use_underline || priv->use_stock)
{
label = gtk_label_new_with_mnemonic (label_text);
gtk_label_set_mnemonic_widget (GTK_LABEL (label),
GTK_WIDGET (button));
}
else
label = gtk_label_new (label_text);
gtk_widget_set_valign (label, GTK_ALIGN_BASELINE);
if (priv->image_position == GTK_POS_RIGHT ||
priv->image_position == GTK_POS_BOTTOM)
gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
else
gtk_box_pack_end (GTK_BOX (box), label, FALSE, FALSE, 0);
}
else
{
gtk_style_context_add_class (context, "image-button");
}
gtk_container_add (GTK_CONTAINER (button), align);
gtk_container_add (GTK_CONTAINER (align), box);
gtk_widget_show_all (align);
g_object_unref (image);
return;
}
if (priv->use_underline || priv->use_stock)
{
label = gtk_label_new_with_mnemonic (priv->label_text);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), GTK_WIDGET (button));
}
else
label = gtk_label_new (priv->label_text);
gtk_widget_set_valign (label, GTK_ALIGN_BASELINE);
maybe_set_alignment (button, label);
gtk_widget_show (label);
gtk_container_add (GTK_CONTAINER (button), label);
gtk_style_context_add_class (context, "text-button");
}
/**
* 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
*
* 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,
"image", image,
NULL);
return button;
}
/**
* gtk_button_new_from_stock:
* @stock_id: the name of the stock item
*
* Creates a new #GtkButton containing the image and text from a stock item.
* Some stock ids have preprocessor macros like #GTK_STOCK_OK and
* #GTK_STOCK_APPLY.
*
* If @stock_id is unknown, then it will be treated as a mnemonic
* label (as for gtk_button_new_with_mnemonic()).
*
* Returns: a new #GtkButton
*
* Deprecated: 3.10: Use gtk_button_new_with_label() instead.
**/
GtkWidget*
gtk_button_new_from_stock (const gchar *stock_id)
{
return g_object_new (GTK_TYPE_BUTTON,
"label", stock_id,
"use-stock", TRUE,
"use-underline", TRUE,
NULL);
}
/**
* 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_pressed:
* @button: The #GtkButton you want to send the signal to.
*
* Emits a #GtkButton::pressed signal to the given #GtkButton.
*
* Deprecated: 2.20: Use the #GtkWidget::button-press-event signal.
*/
void
gtk_button_pressed (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[PRESSED], 0);
}
/**
* gtk_button_released:
* @button: The #GtkButton you want to send the signal to.
*
* Emits a #GtkButton::released signal to the given #GtkButton.
*
* Deprecated: 2.20: Use the #GtkWidget::button-release-event signal.
*/
void
gtk_button_released (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[RELEASED], 0);
}
/**
* 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_enter:
* @button: The #GtkButton you want to send the signal to.
*
* Emits a #GtkButton::enter signal to the given #GtkButton.
*
* Deprecated: 2.20: Use the #GtkWidget::enter-notify-event signal.
*/
void
gtk_button_enter (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[ENTER], 0);
}
/**
* gtk_button_leave:
* @button: The #GtkButton you want to send the signal to.
*
* Emits a #GtkButton::leave signal to the given #GtkButton.
*
* Deprecated: 2.20: Use the #GtkWidget::leave-notify-event signal.
*/
void
gtk_button_leave (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[LEAVE], 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;
GdkWindowAttr attributes;
gint attributes_mask;
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_set_realized (widget, TRUE);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_ONLY;
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_TOUCH_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y;
window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, window);
g_object_ref (window);
priv->event_window = gdk_window_new (window,
&attributes, attributes_mask);
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_update_image_spacing (GtkButton *button,
GtkStyleContext *context)
{
GtkButtonPrivate *priv = button->priv;
GtkWidget *child;
gint spacing;
/* Keep in sync with gtk_button_construct_child,
* we only want to update the spacing if the box
* was constructed there.
*/
if (!priv->constructed || !priv->image)
return;
child = gtk_bin_get_child (GTK_BIN (button));
if (GTK_IS_ALIGNMENT (child))
{
child = gtk_bin_get_child (GTK_BIN (child));
if (GTK_IS_BOX (child))
{
gtk_style_context_get_style (context,
"image-spacing", &spacing,
NULL);
gtk_box_set_spacing (GTK_BOX (child), spacing);
}
}
}
static void
gtk_button_style_updated (GtkWidget *widget)
{
GtkStyleContext *context;
GTK_WIDGET_CLASS (gtk_button_parent_class)->style_updated (widget);
context = gtk_widget_get_style_context (widget);
gtk_button_update_image_spacing (GTK_BUTTON (widget), context);
}
static void
gtk_button_get_props (GtkButton *button,
GtkBorder *default_border,
GtkBorder *default_outside_border,
GtkBorder *padding,
GtkBorder *border)
{
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder *tmp_border;
context = gtk_widget_get_style_context (GTK_WIDGET (button));
state = gtk_style_context_get_state (context);
if (default_border)
{
gtk_style_context_get_style (context,
"default-border", &tmp_border,
NULL);
if (tmp_border)
{
*default_border = *tmp_border;
gtk_border_free (tmp_border);
}
else
*default_border = default_default_border;
}
if (default_outside_border)
{
gtk_style_context_get_style (context,
"default-outside-border", &tmp_border,
NULL);
if (tmp_border)
{
*default_outside_border = *tmp_border;
gtk_border_free (tmp_border);
}
else
*default_outside_border = default_default_outside_border;
}
if (padding)
gtk_style_context_get_padding (context, state, padding);
if (border)
gtk_style_context_get_border (context, state, border);
}
/* Computes the size of the border around the button's child
* including all CSS and style properties so it can be used
* during size allocation and size request phases. */
static void
gtk_button_get_full_border (GtkButton *button,
GtkBorder *full_border)
{
GtkBorder default_border, padding, border;
gtk_button_get_props (button, &default_border, NULL,
&padding, &border);
full_border->left = padding.left + border.left;
full_border->right = padding.right + border.right;
full_border->top = padding.top + border.top;
full_border->bottom = padding.bottom + border.bottom;
if (gtk_widget_get_can_default (GTK_WIDGET (button)))
{
full_border->left += default_border.left;
full_border->right += default_border.right;
full_border->top += default_border.top;
full_border->bottom += default_border.bottom;
}
}
static void
gtk_button_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkButton *button = GTK_BUTTON (widget);
GtkButtonPrivate *priv = button->priv;
GtkWidget *child;
gtk_widget_set_allocation (widget, allocation);
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (priv->event_window,
allocation->x,
allocation->y,
allocation->width,
allocation->height);
child = gtk_bin_get_child (GTK_BIN (button));
if (child && gtk_widget_get_visible (child))
{
GtkAllocation child_allocation;
GtkBorder border;
gint baseline;
gtk_button_get_full_border (button, &border);
child_allocation.x = allocation->x + border.left;
child_allocation.y = allocation->y + border.top;
child_allocation.width = allocation->width - border.left - border.right;
child_allocation.height = allocation->height - border.top - border.bottom;
baseline = gtk_widget_get_allocated_baseline (widget);
if (baseline != -1)
baseline -= border.top;
child_allocation.width = MAX (1, child_allocation.width);
child_allocation.height = MAX (1, child_allocation.height);
gtk_widget_size_allocate_with_baseline (child, &child_allocation, baseline);
}
_gtk_widget_set_simple_clip (widget, NULL);
}
static gboolean
gtk_button_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkButton *button = GTK_BUTTON (widget);
gint x, y;
gint width, height;
GtkBorder default_border;
GtkBorder default_outside_border;
GtkStyleContext *context;
GtkStateFlags state;
context = gtk_widget_get_style_context (widget);
state = gtk_style_context_get_state (context);
gtk_button_get_props (button, &default_border, &default_outside_border, NULL, NULL);
x = 0;
y = 0;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
if (gtk_widget_has_default (widget) &&
gtk_button_get_relief (button) == GTK_RELIEF_NORMAL)
{
x += default_border.left;
y += default_border.top;
width -= default_border.left + default_border.right;
height -= default_border.top + default_border.bottom;
}
else if (gtk_widget_get_can_default (widget))
{
x += default_outside_border.left;
y += default_outside_border.top;
width -= default_outside_border.left + default_outside_border.right;
height -= default_outside_border.top + default_outside_border.bottom;
}
gtk_render_background (context, cr, x, y, width, height);
gtk_render_frame (context, cr, x, y, width, height);
if (gtk_widget_has_visible_focus (widget))
{
GtkBorder border;
gtk_style_context_get_border (context, state, &border);
x += border.left;
y += border.top;
width -= border.left + border.right;
height -= border.top + border.bottom;
gtk_render_focus (context, cr, x, y, width, height);
}
GTK_WIDGET_CLASS (gtk_button_parent_class)->draw (widget, cr);
return FALSE;
}
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;
g_signal_emit (button, button_signals[ENTER], 0);
}
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;
g_signal_emit (button, button_signals[LEAVE], 0);
}
return FALSE;
}
static void
gtk_real_button_pressed (GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
if (priv->activate_timeout)
return;
priv->button_down = TRUE;
gtk_button_update_state (button);
}
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
gtk_real_button_released (GtkButton *button)
{
gtk_button_do_release (button,
gtk_widget_is_sensitive (GTK_WIDGET (button)) &&
(button->priv->in_button ||
touch_release_in_button (button)));
}
static void
gtk_real_button_clicked (GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
if (priv->action_helper)
gtk_action_helper_activate (priv->action_helper);
if (priv->action)
gtk_action_activate (priv->action);
}
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_device_grab (device, priv->event_window,
GDK_OWNERSHIP_WINDOW, TRUE,
GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
NULL, time) == 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_device_ungrab (priv->grab_keyboard, priv->grab_time);
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_get_size (GtkWidget *widget,
GtkOrientation orientation,
gint for_size,
gint *minimum_size,
gint *natural_size,
gint *minimum_baseline,
gint *natural_baseline)
{
GtkButton *button = GTK_BUTTON (widget);
GtkWidget *child;
GtkBorder border;
gint minimum, natural;
gtk_button_get_full_border (button, &border);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
minimum = border.left + border.right;
natural = minimum;
if (for_size >= 0)
for_size -= border.top + border.bottom;
}
else
{
minimum = border.top + border.bottom;
natural = minimum;
if (for_size >= 0)
for_size -= border.left + border.right;
}
if ((child = gtk_bin_get_child (GTK_BIN (button))) &&
gtk_widget_get_visible (child))
{
gint child_min, child_nat;
gint child_min_baseline = -1, child_nat_baseline = -1;
_gtk_widget_get_preferred_size_for_size (child,
orientation,
for_size,
&child_min, &child_nat,
&child_min_baseline, &child_nat_baseline);
if (minimum_baseline && child_min_baseline >= 0)
*minimum_baseline = child_min_baseline + border.top;
if (natural_baseline && child_nat_baseline >= 0)
*natural_baseline = child_nat_baseline + border.top;
minimum += child_min;
natural += child_nat;
}
*minimum_size = minimum;
*natural_size = natural;
}
static void
gtk_button_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_button_get_size (widget, 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_button_get_size (widget, 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_button_get_size (widget, 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_button_get_size (widget, 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 width,
gint *minimum_size,
gint *natural_size,
gint *minimum_baseline,
gint *natural_baseline)
{
gtk_button_get_size (widget, GTK_ORIENTATION_VERTICAL, width, 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 @str. This text is
* also used to select the stock item if gtk_button_set_use_stock()
* is used.
*
* This will also clear any previously set labels.
**/
void
gtk_button_set_label (GtkButton *button,
const gchar *label)
{
GtkButtonPrivate *priv;
gchar *new_label;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = button->priv;
new_label = g_strdup (label);
g_free (priv->label_text);
priv->label_text = new_label;
gtk_button_construct_child (button);
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: 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;
gtk_button_construct_child (button);
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_USE_UNDERLINE]);
}
}
/**
* 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;
}
/**
* gtk_button_set_use_stock:
* @button: a #GtkButton
* @use_stock: %TRUE if the button should use a stock item
*
* If %TRUE, the label set on the button is used as a
* stock id to select the stock item for the button.
*
* Deprecated: 3.10
*/
void
gtk_button_set_use_stock (GtkButton *button,
gboolean use_stock)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = button->priv;
use_stock = use_stock != FALSE;
if (use_stock != priv->use_stock)
{
priv->use_stock = use_stock;
gtk_button_construct_child (button);
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_USE_STOCK]);
}
}
/**
* gtk_button_get_use_stock:
* @button: a #GtkButton
*
* Returns whether the button label is a stock item.
*
* Returns: %TRUE if the button label is used to
* select a stock item instead of being
* used directly as the label text.
*
* Deprecated: 3.10
*/
gboolean
gtk_button_get_use_stock (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
return button->priv->use_stock;
}
/**
* gtk_button_set_focus_on_click:
* @button: a #GtkButton
* @focus_on_click: whether the button grabs focus when clicked with the mouse
*
* Sets whether the button will grab focus when it is clicked with the mouse.
* Making mouse clicks not grab focus is useful in places like toolbars where
* you don’t want the keyboard focus removed from the main area of the
* application.
*
* Since: 2.4
**/
void
gtk_button_set_focus_on_click (GtkButton *button,
gboolean focus_on_click)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = button->priv;
focus_on_click = focus_on_click != FALSE;
if (priv->focus_on_click != focus_on_click)
{
priv->focus_on_click = focus_on_click;
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_FOCUS_ON_CLICK]);
}
}
/**
* gtk_button_get_focus_on_click:
* @button: a #GtkButton
*
* Returns whether the button grabs focus when it is clicked with the mouse.
* See gtk_button_set_focus_on_click().
*
* Returns: %TRUE if the button grabs focus when it is clicked with
* the mouse.
*
* Since: 2.4
**/
gboolean
gtk_button_get_focus_on_click (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
return button->priv->focus_on_click;
}
/**
* gtk_button_set_alignment:
* @button: a #GtkButton
* @xalign: the horizontal position of the child, 0.0 is left aligned,
* 1.0 is right aligned
* @yalign: the vertical position of the child, 0.0 is top aligned,
* 1.0 is bottom aligned
*
* Sets the alignment of the child. This property has no effect unless
* the child is a #GtkMisc or a #GtkAlignment.
*
* Since: 2.4
*
* Deprecated: 3.14: Access the child widget directly if you need to control
* its alignment.
*/
void
gtk_button_set_alignment (GtkButton *button,
gfloat xalign,
gfloat yalign)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = button->priv;
priv->xalign = xalign;
priv->yalign = yalign;
priv->align_set = 1;
maybe_set_alignment (button, gtk_bin_get_child (GTK_BIN (button)));
g_object_freeze_notify (G_OBJECT (button));
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_XALIGN]);
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_YALIGN]);
g_object_thaw_notify (G_OBJECT (button));
}
/**
* gtk_button_get_alignment:
* @button: a #GtkButton
* @xalign: (out): return location for horizontal alignment
* @yalign: (out): return location for vertical alignment
*
* Gets the alignment of the child in the button.
*
* Since: 2.4
*
* Deprecated: 3.14: Access the child widget directly if you need to control
* its alignment.
*/
void
gtk_button_get_alignment (GtkButton *button,
gfloat *xalign,
gfloat *yalign)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = button->priv;
if (xalign)
*xalign = priv->xalign;
if (yalign)
*yalign = priv->yalign;
}
static void
gtk_button_enter_leave (GtkButton *button)
{
gtk_button_update_state (button);
}
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
show_image_change_notify (GtkButton *button)
{
GtkButtonPrivate *priv = button->priv;
if (priv->image)
{
if (show_image (button))
gtk_widget_show (priv->image);
else
gtk_widget_hide (priv->image);
}
}
static void
traverse_container (GtkWidget *widget,
gpointer data)
{
if (GTK_IS_BUTTON (widget))
show_image_change_notify (GTK_BUTTON (widget));
else if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL);
}
static void
gtk_button_setting_changed (GtkSettings *settings)
{
GList *list, *l;
list = gtk_window_list_toplevels ();
for (l = list; l; l = l->next)
gtk_container_forall (GTK_CONTAINER (l->data),
traverse_container, NULL);
g_list_free (list);
}
static void
gtk_button_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
GtkButton *button;
GtkButtonPrivate *priv;
GtkSettings *settings;
gulong show_image_connection;
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);
}
settings = gtk_widget_get_settings (widget);
show_image_connection =
g_signal_handler_find (settings, G_SIGNAL_MATCH_FUNC, 0, 0,
NULL, gtk_button_setting_changed, NULL);
if (show_image_connection)
return;
g_signal_connect (settings, "notify::gtk-button-images",
G_CALLBACK (gtk_button_setting_changed), NULL);
show_image_change_notify (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_set_image:
* @button: a #GtkButton
* @image: a widget to set as the image for the button
*
* Set the image of @button to the given widget. The image will be
* displayed if the label text is %NULL or if
* #GtkButton:always-show-image is %TRUE. You don’t have to call
* gtk_widget_show() on @image yourself.
*
* Since: 2.6
*/
void
gtk_button_set_image (GtkButton *button,
GtkWidget *image)
{
GtkButtonPrivate *priv;
GtkWidget *parent;
g_return_if_fail (GTK_IS_BUTTON (button));
g_return_if_fail (image == NULL || GTK_IS_WIDGET (image));
priv = button->priv;
if (priv->image)
{
parent = gtk_widget_get_parent (priv->image);
if (parent)
gtk_container_remove (GTK_CONTAINER (parent), priv->image);
}
priv->image = image;
priv->image_is_stock = (image == NULL);
gtk_button_construct_child (button);
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_IMAGE]);
}
/**
* gtk_button_get_image:
* @button: a #GtkButton
*
* Gets the widget that is currenty set as the image of @button.
* This may have been explicitly set by gtk_button_set_image()
* or constructed by gtk_button_new_from_stock().
*
* Returns: (transfer none): a #GtkWidget or %NULL in case there is no image
*
* Since: 2.6
*/
GtkWidget *
gtk_button_get_image (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
return button->priv->image;
}
/**
* gtk_button_set_image_position:
* @button: a #GtkButton
* @position: the position
*
* Sets the position of the image relative to the text
* inside the button.
*
* Since: 2.10
*/
void
gtk_button_set_image_position (GtkButton *button,
GtkPositionType position)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
g_return_if_fail (position >= GTK_POS_LEFT && position <= GTK_POS_BOTTOM);
priv = button->priv;
if (priv->image_position != position)
{
priv->image_position = position;
gtk_button_construct_child (button);
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_IMAGE_POSITION]);
}
}
/**
* gtk_button_get_image_position:
* @button: a #GtkButton
*
* Gets the position of the image relative to the text
* inside the button.
*
* Returns: the position
*
* Since: 2.10
*/
GtkPositionType
gtk_button_get_image_position (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_POS_LEFT);
return button->priv->image_position;
}
/**
* gtk_button_set_always_show_image:
* @button: a #GtkButton
* @always_show: %TRUE if the menuitem should always show the image
*
* If %TRUE, the button will ignore the #GtkSettings:gtk-button-images
* setting and always show the image, if available.
*
* Use this property if the button would be useless or hard to use
* without the image.
*
* Since: 3.6
*/
void
gtk_button_set_always_show_image (GtkButton *button,
gboolean always_show)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = button->priv;
if (priv->always_show_image != always_show)
{
priv->always_show_image = always_show;
if (priv->image)
{
if (show_image (button))
gtk_widget_show (priv->image);
else
gtk_widget_hide (priv->image);
}
g_object_notify_by_pspec (G_OBJECT (button), props[PROP_ALWAYS_SHOW_IMAGE]);
}
}
/**
* gtk_button_get_always_show_image:
* @button: a #GtkButton
*
* Returns whether the button will ignore the #GtkSettings:gtk-button-images
* setting and always show the image, if available.
*
* Returns: %TRUE if the button will always show the image
*
* Since: 3.6
*/
gboolean
gtk_button_get_always_show_image (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
return button->priv->always_show_image;
}
/**
* 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;
}
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