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gtk2/gtk/gtkbutton.c
Matthias Clasen 9c50b8bc2f button: Free gadgets and gestures in finalize 
This is the right place to free them.
2016-06-05 20:00:43 -04:00

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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 "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"
#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 {
PRESSED,
RELEASED,
CLICKED,
ENTER,
LEAVE,
ACTIVATE,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_LABEL,
PROP_IMAGE,
PROP_RELIEF,
PROP_USE_UNDERLINE,
PROP_USE_STOCK,
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_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_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_do_release (GtkButton *button,
gboolean emit_clicked);
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 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 gboolean gtk_button_render (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer data);
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->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->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_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;
* the value of this style property is ignored.
*/
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;
* the value of this style property is ignored.
*/
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));
/**
* GtkButton:child-displacement-x:
*
* How far in the x direction to move the child when the button is depressed.
*
* Deprecated: 3.20: Use CSS margins and padding instead;
* the value of this style property is ignored.
*/
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));
/**
* GtkButton:child-displacement-y:
*
* How far in the y direction to move the child when the button is depressed.
*
* Deprecated: 3.20: Use CSS margins and padding instead;
* the value of this style property is ignored.
*/
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
*
* Deprecated: 3.20: Use CSS margins and padding instead;
* the value of this style property is ignored.
*/
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
*
* Deprecated: 3.20: Use CSS margins and padding instead.
*/
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 | G_PARAM_DEPRECATED));
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;
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;
g_signal_emit (button, button_signals[RELEASED], 0);
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_stock = FALSE;
priv->use_underline = FALSE;
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;
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,
gtk_button_render,
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_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 || priv->image != 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_LABEL (widget))
g_object_set (widget, "xalign", priv->xalign, "yalign", priv->yalign, NULL);
else 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_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_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 (#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,
"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_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 gboolean
gtk_button_draw (GtkWidget *widget,
cairo_t *cr)
{
gtk_css_gadget_draw (GTK_BUTTON (widget)->priv->gadget, cr);
return FALSE;
}
static gboolean
gtk_button_render (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer data)
{
GtkWidget *widget;
widget = gtk_css_gadget_get_owner (gadget);
GTK_WIDGET_CLASS (gtk_button_parent_class)->draw (widget, cr);
return gtk_widget_has_visible_focus (widget);
}
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_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 @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)
{
g_return_if_fail (GTK_IS_BUTTON (button));
gtk_widget_set_focus_on_click (GTK_WIDGET (button), 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 gtk_widget_get_focus_on_click (GTK_WIDGET (button));
}
/**
* 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: (nullable) (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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