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gtk2/gtk/gtkbutton.c
Matthias Clasen ead11a6119 Doc fixes. 
2004-04-15  Matthias Clasen  <mclasen@redhat.com>

	* gtk/gtkcellrenderer.c (gtk_cell_renderer_class_init):
	* gtk/gtkbutton.c (gtk_button_class_init): Doc fixes.
2004-04-15 14:31:02 +00:00

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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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* 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/.
*/
#include <config.h>
#include <string.h>
#include "gtkalignment.h"
#include "gtkbutton.h"
#include "gtklabel.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkimage.h"
#include "gtkhbox.h"
#include "gtkstock.h"
#include "gtkiconfactory.h"
#include "gtkintl.h"
#define CHILD_SPACING 1
static const GtkBorder default_default_border = { 1, 1, 1, 1 };
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_RELIEF,
PROP_USE_UNDERLINE,
PROP_USE_STOCK,
PROP_FOCUS_ON_CLICK,
PROP_XALIGN,
PROP_YALIGN
};
#define GTK_BUTTON_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_BUTTON, GtkButtonPrivate))
typedef struct _GtkButtonPrivate GtkButtonPrivate;
struct _GtkButtonPrivate
{
gfloat xalign;
gfloat yalign;
GtkSettings *settings;
guint show_image_connection;
GtkWidget *image;
guint align_set : 1;
};
static void gtk_button_class_init (GtkButtonClass *klass);
static void gtk_button_init (GtkButton *button);
static void gtk_button_destroy (GtkObject *object);
static void gtk_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_button_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen);
static void gtk_button_realize (GtkWidget *widget);
static void gtk_button_unrealize (GtkWidget *widget);
static void gtk_button_map (GtkWidget *widget);
static void gtk_button_unmap (GtkWidget *widget);
static void gtk_button_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_button_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gint gtk_button_expose (GtkWidget *widget,
GdkEventExpose *event);
static gint gtk_button_button_press (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_button_button_release (GtkWidget *widget,
GdkEventButton *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_activate (GtkButton *button);
static void gtk_button_update_state (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 GObject* gtk_button_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params);
static void gtk_button_construct_child (GtkButton *button);
static GtkBinClass *parent_class = NULL;
static guint button_signals[LAST_SIGNAL] = { 0 };
GType
gtk_button_get_type (void)
{
static GType button_type = 0;
if (!button_type)
{
static const GTypeInfo button_info =
{
sizeof (GtkButtonClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_button_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkButton),
16, /* n_preallocs */
(GInstanceInitFunc) gtk_button_init,
};
button_type = g_type_register_static (GTK_TYPE_BIN, "GtkButton",
&button_info, 0);
}
return button_type;
}
static void
gtk_button_class_init (GtkButtonClass *klass)
{
GObjectClass *gobject_class;
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = G_OBJECT_CLASS (klass);
object_class = (GtkObjectClass*) klass;
widget_class = (GtkWidgetClass*) klass;
container_class = (GtkContainerClass*) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->constructor = gtk_button_constructor;
gobject_class->set_property = gtk_button_set_property;
gobject_class->get_property = gtk_button_get_property;
object_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->size_request = gtk_button_size_request;
widget_class->size_allocate = gtk_button_size_allocate;
widget_class->expose_event = gtk_button_expose;
widget_class->button_press_event = gtk_button_button_press;
widget_class->button_release_event = gtk_button_button_release;
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;
container_class->child_type = gtk_button_child_type;
container_class->add = gtk_button_add;
klass->pressed = gtk_real_button_pressed;
klass->released = gtk_real_button_released;
klass->clicked = NULL;
klass->enter = gtk_button_update_state;
klass->leave = gtk_button_update_state;
klass->activate = gtk_real_button_activate;
g_object_class_install_property (gobject_class,
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,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class,
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,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class,
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,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class,
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,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_RELIEF,
g_param_spec_enum ("relief",
P_("Border relief"),
P_("The border relief style"),
GTK_TYPE_RELIEF_STYLE,
GTK_RELIEF_NORMAL,
G_PARAM_READABLE | G_PARAM_WRITABLE));
/**
* GtkButton:xalign:
*
* If the child of the button is a #GtkMisc or #GtkAlignment, this property
* can be used to control it's horizontal alignment. 0.0 is left aligned,
* 1.0 is right aligned.
*
* Since: 2.4
*/
g_object_class_install_property (gobject_class,
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,
G_PARAM_READABLE | G_PARAM_WRITABLE));
/**
* GtkButton:yalign:
*
* If the child of the button is a #GtkMisc or #GtkAlignment, this property
* can be used to control it's vertical alignment. 0.0 is top aligned,
* 1.0 is bottom aligned.
*
* Since: 2.4
*/
g_object_class_install_property (gobject_class,
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,
G_PARAM_READABLE | G_PARAM_WRITABLE));
button_signals[PRESSED] =
g_signal_new ("pressed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkButtonClass, pressed),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
button_signals[RELEASED] =
g_signal_new ("released",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkButtonClass, released),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
button_signals[CLICKED] =
g_signal_new ("clicked",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkButtonClass, clicked),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
button_signals[ENTER] =
g_signal_new ("enter",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkButtonClass, enter),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
button_signals[LEAVE] =
g_signal_new ("leave",
G_OBJECT_CLASS_TYPE (object_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
* "clicked" signal.
*/
button_signals[ACTIVATE] =
g_signal_new ("activate",
G_OBJECT_CLASS_TYPE (object_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];
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boxed ("default_border",
P_("Default Spacing"),
P_("Extra space to add for CAN_DEFAULT buttons"),
GTK_TYPE_BORDER,
G_PARAM_READABLE));
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 CAN_DEFAULT buttons that is always drawn outside the border"),
GTK_TYPE_BORDER,
G_PARAM_READABLE));
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,
G_PARAM_READABLE));
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,
G_PARAM_READABLE));
gtk_settings_install_property (g_param_spec_boolean ("gtk-button-images",
P_("Show button images"),
P_("Whether stock icons should be shown in buttons"),
TRUE,
G_PARAM_READWRITE));
g_type_class_add_private (gobject_class, sizeof (GtkButtonPrivate));
}
static void
gtk_button_init (GtkButton *button)
{
GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_FOCUS | GTK_RECEIVES_DEFAULT);
GTK_WIDGET_SET_FLAGS (button, GTK_NO_WINDOW);
button->label_text = NULL;
button->constructed = FALSE;
button->in_button = FALSE;
button->button_down = FALSE;
button->relief = GTK_RELIEF_NORMAL;
button->use_stock = FALSE;
button->use_underline = FALSE;
button->depressed = FALSE;
button->depress_on_activate = TRUE;
button->focus_on_click = TRUE;
priv->xalign = 0.5;
priv->yalign = 0.5;
priv->align_set = 0;
}
static void
gtk_button_destroy (GtkObject *object)
{
GtkButton *button = GTK_BUTTON (object);
if (button->label_text)
{
g_free (button->label_text);
button->label_text = NULL;
}
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static GObject*
gtk_button_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params)
{
GObject *object;
GtkButton *button;
object = (* G_OBJECT_CLASS (parent_class)->constructor) (type,
n_construct_properties,
construct_params);
button = GTK_BUTTON (object);
button->constructed = TRUE;
if (button->label_text != NULL)
gtk_button_construct_child (button);
return object;
}
static GType
gtk_button_child_type (GtkContainer *container)
{
if (!GTK_BIN (container)->child)
return GTK_TYPE_WIDGET;
else
return G_TYPE_NONE;
}
static void
maybe_set_alignment (GtkButton *button,
GtkWidget *widget)
{
GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
if (GTK_IS_MISC (widget))
{
GtkMisc *misc = GTK_MISC (widget);
if (priv->align_set)
gtk_misc_set_alignment (misc, priv->xalign, priv->yalign);
}
else if (GTK_IS_ALIGNMENT (widget))
{
GtkAlignment *alignment = GTK_ALIGNMENT (widget);
if (priv->align_set)
gtk_alignment_set (alignment, priv->xalign, priv->yalign,
alignment->xscale, alignment->yscale);
}
}
static void
gtk_button_add (GtkContainer *container,
GtkWidget *widget)
{
maybe_set_alignment (GTK_BUTTON (container), widget);
GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
}
static void
gtk_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkButton *button = GTK_BUTTON (object);
GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
switch (prop_id)
{
case PROP_LABEL:
gtk_button_set_label (button, g_value_get_string (value));
break;
case PROP_RELIEF:
gtk_button_set_relief (button, g_value_get_enum (value));
break;
case PROP_USE_UNDERLINE:
gtk_button_set_use_underline (button, g_value_get_boolean (value));
break;
case PROP_USE_STOCK:
gtk_button_set_use_stock (button, g_value_get_boolean (value));
break;
case PROP_FOCUS_ON_CLICK:
gtk_button_set_focus_on_click (button, g_value_get_boolean (value));
break;
case PROP_XALIGN:
gtk_button_set_alignment (button, g_value_get_float (value), priv->yalign);
break;
case PROP_YALIGN:
gtk_button_set_alignment (button, priv->xalign, g_value_get_float (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 = GTK_BUTTON_GET_PRIVATE (button);
switch (prop_id)
{
case PROP_LABEL:
g_value_set_string (value, button->label_text);
break;
case PROP_RELIEF:
g_value_set_enum (value, gtk_button_get_relief (button));
break;
case PROP_USE_UNDERLINE:
g_value_set_boolean (value, button->use_underline);
break;
case PROP_USE_STOCK:
g_value_set_boolean (value, button->use_stock);
break;
case PROP_FOCUS_ON_CLICK:
g_value_set_boolean (value, button->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;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
GtkWidget*
gtk_button_new (void)
{
return g_object_new (GTK_TYPE_BUTTON, NULL);
}
static gboolean
show_image (GtkButton *button)
{
GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (button));
gboolean show;
g_object_get (settings, "gtk-button-images", &show, NULL);
return show;
}
static void
gtk_button_construct_child (GtkButton *button)
{
GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
GtkStockItem item;
GtkWidget *label;
GtkWidget *hbox;
GtkWidget *align;
if (!button->constructed)
return;
if (button->label_text == NULL)
return;
if (GTK_BIN (button)->child)
{
gtk_container_remove (GTK_CONTAINER (button),
GTK_BIN (button)->child);
priv->image = NULL;
}
if (button->use_stock &&
gtk_stock_lookup (button->label_text, &item))
{
label = gtk_label_new_with_mnemonic (item.label);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), GTK_WIDGET (button));
priv->image = gtk_image_new_from_stock (button->label_text, GTK_ICON_SIZE_BUTTON);
g_object_set (priv->image,
"visible", show_image (button),
"no_show_all", TRUE,
NULL);
hbox = gtk_hbox_new (FALSE, 2);
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_box_pack_start (GTK_BOX (hbox), priv->image, FALSE, FALSE, 0);
gtk_box_pack_end (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_container_add (GTK_CONTAINER (button), align);
gtk_container_add (GTK_CONTAINER (align), hbox);
gtk_widget_show_all (align);
return;
}
if (button->use_underline)
{
label = gtk_label_new_with_mnemonic (button->label_text);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), GTK_WIDGET (button));
}
else
label = gtk_label_new (button->label_text);
if (priv->align_set)
gtk_misc_set_alignment (GTK_MISC (label), priv->xalign, priv->yalign);
gtk_widget_show (label);
gtk_container_add (GTK_CONTAINER (button), label);
}
GtkWidget*
gtk_button_new_with_label (const gchar *label)
{
return g_object_new (GTK_TYPE_BUTTON, "label", label, NULL);
}
/**
* 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
**/
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
* @returns: a new #GtkButton
*
* 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.
**/
GtkWidget*
gtk_button_new_with_mnemonic (const gchar *label)
{
return g_object_new (GTK_TYPE_BUTTON, "label", label, "use_underline", TRUE, NULL);
}
void
gtk_button_pressed (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[PRESSED], 0);
}
void
gtk_button_released (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[RELEASED], 0);
}
void
gtk_button_clicked (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[CLICKED], 0);
}
void
gtk_button_enter (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[ENTER], 0);
}
void
gtk_button_leave (GtkButton *button)
{
g_return_if_fail (GTK_IS_BUTTON (button));
g_signal_emit (button, button_signals[LEAVE], 0);
}
void
gtk_button_set_relief (GtkButton *button,
GtkReliefStyle newrelief)
{
g_return_if_fail (GTK_IS_BUTTON (button));
if (newrelief != button->relief)
{
button->relief = newrelief;
g_object_notify (G_OBJECT (button), "relief");
gtk_widget_queue_draw (GTK_WIDGET (button));
}
}
GtkReliefStyle
gtk_button_get_relief (GtkButton *button)
{
g_return_val_if_fail (button != NULL, GTK_RELIEF_NORMAL);
g_return_val_if_fail (GTK_IS_BUTTON (button), GTK_RELIEF_NORMAL);
return button->relief;
}
static void
gtk_button_realize (GtkWidget *widget)
{
GtkButton *button;
GdkWindowAttr attributes;
gint attributes_mask;
gint border_width;
button = GTK_BUTTON (widget);
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
border_width = GTK_CONTAINER (widget)->border_width;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = widget->allocation.x + border_width;
attributes.y = widget->allocation.y + border_width;
attributes.width = widget->allocation.width - border_width * 2;
attributes.height = widget->allocation.height - border_width * 2;
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_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y;
widget->window = gtk_widget_get_parent_window (widget);
g_object_ref (widget->window);
button->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (button->event_window, button);
widget->style = gtk_style_attach (widget->style, widget->window);
}
static void
gtk_button_unrealize (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
if (button->activate_timeout)
gtk_button_finish_activate (button, FALSE);
if (button->event_window)
{
gdk_window_set_user_data (button->event_window, NULL);
gdk_window_destroy (button->event_window);
button->event_window = NULL;
}
GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
}
static void
gtk_button_map (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
g_return_if_fail (GTK_IS_BUTTON (widget));
GTK_WIDGET_CLASS (parent_class)->map (widget);
if (button->event_window)
gdk_window_show (button->event_window);
}
static void
gtk_button_unmap (GtkWidget *widget)
{
GtkButton *button = GTK_BUTTON (widget);
g_return_if_fail (GTK_IS_BUTTON (widget));
if (button->event_window)
gdk_window_hide (button->event_window);
GTK_WIDGET_CLASS (parent_class)->unmap (widget);
}
static void
gtk_button_get_props (GtkButton *button,
GtkBorder *default_border,
GtkBorder *default_outside_border,
gboolean *interior_focus)
{
GtkWidget *widget = GTK_WIDGET (button);
GtkBorder *tmp_border;
if (default_border)
{
gtk_widget_style_get (widget, "default_border", &tmp_border, NULL);
if (tmp_border)
{
*default_border = *tmp_border;
g_free (tmp_border);
}
else
*default_border = default_default_border;
}
if (default_outside_border)
{
gtk_widget_style_get (widget, "default_outside_border", &tmp_border, NULL);
if (tmp_border)
{
*default_outside_border = *tmp_border;
g_free (tmp_border);
}
else
*default_outside_border = default_default_outside_border;
}
if (interior_focus)
gtk_widget_style_get (widget, "interior_focus", interior_focus, NULL);
}
static void
gtk_button_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkButton *button = GTK_BUTTON (widget);
GtkBorder default_border;
gboolean interior_focus;
gint focus_width;
gint focus_pad;
gtk_button_get_props (button, &default_border, NULL, &interior_focus);
gtk_widget_style_get (GTK_WIDGET (widget),
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
NULL);
requisition->width = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
GTK_WIDGET (widget)->style->xthickness) * 2;
requisition->height = (GTK_CONTAINER (widget)->border_width + CHILD_SPACING +
GTK_WIDGET (widget)->style->ythickness) * 2;
if (GTK_WIDGET_CAN_DEFAULT (widget))
{
requisition->width += default_border.left + default_border.right;
requisition->height += default_border.top + default_border.bottom;
}
if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
{
GtkRequisition child_requisition;
gtk_widget_size_request (GTK_BIN (button)->child, &child_requisition);
requisition->width += child_requisition.width;
requisition->height += child_requisition.height;
}
requisition->width += 2 * (focus_width + focus_pad);
requisition->height += 2 * (focus_width + focus_pad);
}
static void
gtk_button_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkButton *button = GTK_BUTTON (widget);
GtkAllocation child_allocation;
gint border_width = GTK_CONTAINER (widget)->border_width;
gint xthickness = GTK_WIDGET (widget)->style->xthickness;
gint ythickness = GTK_WIDGET (widget)->style->ythickness;
GtkBorder default_border;
gtk_button_get_props (button, &default_border, NULL, NULL);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (button->event_window,
widget->allocation.x + border_width,
widget->allocation.y + border_width,
widget->allocation.width - border_width * 2,
widget->allocation.height - border_width * 2);
if (GTK_BIN (button)->child && GTK_WIDGET_VISIBLE (GTK_BIN (button)->child))
{
child_allocation.x = widget->allocation.x + border_width + CHILD_SPACING + xthickness;
child_allocation.y = widget->allocation.y + border_width + CHILD_SPACING + ythickness;
child_allocation.width = MAX (1, widget->allocation.width - (CHILD_SPACING + xthickness) * 2 -
border_width * 2);
child_allocation.height = MAX (1, widget->allocation.height - (CHILD_SPACING + ythickness) * 2 -
border_width * 2);
if (GTK_WIDGET_CAN_DEFAULT (button))
{
child_allocation.x += default_border.left;
child_allocation.y += default_border.top;
child_allocation.width = MAX (1, child_allocation.width - default_border.left - default_border.right);
child_allocation.height = MAX (1, child_allocation.height - default_border.top - default_border.bottom);
}
if (button->depressed)
{
gint child_displacement_x;
gint child_displacement_y;
gtk_widget_style_get (widget,
"child_displacement_x", &child_displacement_x,
"child_displacement_y", &child_displacement_y,
NULL);
child_allocation.x += child_displacement_x;
child_allocation.y += child_displacement_y;
}
gtk_widget_size_allocate (GTK_BIN (button)->child, &child_allocation);
}
}
void
_gtk_button_paint (GtkButton *button,
GdkRectangle *area,
GtkStateType state_type,
GtkShadowType shadow_type,
const gchar *main_detail,
const gchar *default_detail)
{
GtkWidget *widget;
gint width, height;
gint x, y;
gint border_width;
GtkBorder default_border;
GtkBorder default_outside_border;
gboolean interior_focus;
gint focus_width;
gint focus_pad;
if (GTK_WIDGET_DRAWABLE (button))
{
widget = GTK_WIDGET (button);
border_width = GTK_CONTAINER (widget)->border_width;
gtk_button_get_props (button, &default_border, &default_outside_border, &interior_focus);
gtk_widget_style_get (GTK_WIDGET (widget),
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
NULL);
x = widget->allocation.x + border_width;
y = widget->allocation.y + border_width;
width = widget->allocation.width - border_width * 2;
height = widget->allocation.height - border_width * 2;
if (GTK_WIDGET_HAS_DEFAULT (widget) &&
GTK_BUTTON (widget)->relief == GTK_RELIEF_NORMAL)
{
gtk_paint_box (widget->style, widget->window,
GTK_STATE_NORMAL, GTK_SHADOW_IN,
area, widget, "buttondefault",
x, y, width, height);
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_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;
}
if (!interior_focus && GTK_WIDGET_HAS_FOCUS (widget))
{
x += focus_width + focus_pad;
y += focus_width + focus_pad;
width -= 2 * (focus_width + focus_pad);
height -= 2 * (focus_width + focus_pad);
}
if (button->relief != GTK_RELIEF_NONE || button->depressed ||
GTK_WIDGET_STATE(widget) == GTK_STATE_PRELIGHT)
gtk_paint_box (widget->style, widget->window,
state_type,
shadow_type, area, widget, "button",
x, y, width, height);
if (GTK_WIDGET_HAS_FOCUS (widget))
{
if (interior_focus)
{
x += widget->style->xthickness + focus_pad;
y += widget->style->ythickness + focus_pad;
width -= 2 * (widget->style->xthickness + focus_pad);
height -= 2 * (widget->style->ythickness + focus_pad);
}
else
{
x -= focus_width + focus_pad;
y -= focus_width + focus_pad;
width += 2 * (focus_width + focus_pad);
height += 2 * (focus_width + focus_pad);
}
gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
area, widget, "button",
x, y, width, height);
}
}
}
static gboolean
gtk_button_expose (GtkWidget *widget,
GdkEventExpose *event)
{
if (GTK_WIDGET_DRAWABLE (widget))
{
GtkButton *button = GTK_BUTTON (widget);
_gtk_button_paint (button, &event->area,
GTK_WIDGET_STATE (widget),
button->depressed ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
"button", "buttondefault");
(* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
}
return FALSE;
}
static gboolean
gtk_button_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkButton *button;
if (event->type == GDK_BUTTON_PRESS)
{
button = GTK_BUTTON (widget);
if (button->focus_on_click && !GTK_WIDGET_HAS_FOCUS (widget))
gtk_widget_grab_focus (widget);
if (event->button == 1)
gtk_button_pressed (button);
}
return TRUE;
}
static gboolean
gtk_button_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkButton *button;
if (event->button == 1)
{
button = GTK_BUTTON (widget);
gtk_button_released (button);
}
return TRUE;
}
static gboolean
gtk_button_key_release (GtkWidget *widget,
GdkEventKey *event)
{
GtkButton *button = GTK_BUTTON (widget);
if (button->activate_timeout)
{
gtk_button_finish_activate (button, TRUE);
return TRUE;
}
else if (GTK_WIDGET_CLASS (parent_class)->key_release_event)
return GTK_WIDGET_CLASS (parent_class)->key_release_event (widget, event);
else
return FALSE;
}
static gboolean
gtk_button_enter_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkButton *button;
GtkWidget *event_widget;
button = GTK_BUTTON (widget);
event_widget = gtk_get_event_widget ((GdkEvent*) event);
if ((event_widget == widget) &&
(event->detail != GDK_NOTIFY_INFERIOR))
{
button->in_button = TRUE;
gtk_button_enter (button);
}
return FALSE;
}
static gboolean
gtk_button_leave_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkButton *button;
GtkWidget *event_widget;
button = GTK_BUTTON (widget);
event_widget = gtk_get_event_widget ((GdkEvent*) event);
if ((event_widget == widget) &&
(event->detail != GDK_NOTIFY_INFERIOR))
{
button->in_button = FALSE;
gtk_button_leave (button);
}
return FALSE;
}
static void
gtk_real_button_pressed (GtkButton *button)
{
if (button->activate_timeout)
return;
button->button_down = TRUE;
gtk_button_update_state (button);
}
static void
gtk_real_button_released (GtkButton *button)
{
if (button->button_down)
{
button->button_down = FALSE;
if (button->activate_timeout)
return;
if (button->in_button)
gtk_button_clicked (button);
gtk_button_update_state (button);
}
}
static gboolean
button_activate_timeout (gpointer data)
{
GDK_THREADS_ENTER ();
gtk_button_finish_activate (data, TRUE);
GDK_THREADS_LEAVE ();
return FALSE;
}
static void
gtk_real_button_activate (GtkButton *button)
{
GtkWidget *widget = GTK_WIDGET (button);
if (GTK_WIDGET_REALIZED (button) && !button->activate_timeout)
{
if (gdk_keyboard_grab (button->event_window, TRUE,
gtk_get_current_event_time ()) == 0)
{
gtk_grab_add (widget);
button->activate_timeout = g_timeout_add (ACTIVATE_TIMEOUT,
button_activate_timeout,
button);
button->button_down = TRUE;
gtk_button_update_state (button);
gtk_widget_queue_draw (GTK_WIDGET (button));
}
}
}
static void
gtk_button_finish_activate (GtkButton *button,
gboolean do_it)
{
GtkWidget *widget = GTK_WIDGET (button);
g_source_remove (button->activate_timeout);
button->activate_timeout = 0;
gdk_display_keyboard_ungrab (gtk_widget_get_display (widget),
gtk_get_current_event_time ());
gtk_grab_remove (widget);
button->button_down = FALSE;
gtk_button_update_state (button);
gtk_widget_queue_draw (GTK_WIDGET (button));
if (do_it)
gtk_button_clicked (button);
}
/**
* 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)
{
gchar *new_label;
g_return_if_fail (GTK_IS_BUTTON (button));
new_label = g_strdup (label);
g_free (button->label_text);
button->label_text = new_label;
gtk_button_construct_child (button);
g_object_notify (G_OBJECT (button), "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.
*
* Return value: The text of the label widget. This string is owned
* by the widget and must not be modified or freed.
**/
G_CONST_RETURN gchar *
gtk_button_get_label (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), NULL);
return button->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)
{
g_return_if_fail (GTK_IS_BUTTON (button));
use_underline = use_underline != FALSE;
if (use_underline != button->use_underline)
{
button->use_underline = use_underline;
gtk_button_construct_child (button);
g_object_notify (G_OBJECT (button), "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 ().
*
* Return value: %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->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.
*/
void
gtk_button_set_use_stock (GtkButton *button,
gboolean use_stock)
{
g_return_if_fail (GTK_IS_BUTTON (button));
use_stock = use_stock != FALSE;
if (use_stock != button->use_stock)
{
button->use_stock = use_stock;
gtk_button_construct_child (button);
g_object_notify (G_OBJECT (button), "use_stock");
}
}
/**
* gtk_button_get_use_stock:
* @button: a #GtkButton
*
* Returns whether the button label is a stock item.
*
* Return value: %TRUE if the button label is used to
* select a stock item instead of being
* used directly as the label text.
*/
gboolean
gtk_button_get_use_stock (GtkButton *button)
{
g_return_val_if_fail (GTK_IS_BUTTON (button), FALSE);
return button->use_stock;
}
/**
* gtk_button_set_focus_on_click:
* @button: a #GtkButton
* @focus_on_click: whether the mouse 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));
focus_on_click = focus_on_click != FALSE;
if (button->focus_on_click != focus_on_click)
{
button->focus_on_click = focus_on_click;
g_object_notify (G_OBJECT (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().
*
* Return value: %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->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 #GtkAligment.
*
* Since: 2.4
*/
void
gtk_button_set_alignment (GtkButton *button,
gfloat xalign,
gfloat yalign)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = GTK_BUTTON_GET_PRIVATE (button);
priv->xalign = xalign;
priv->yalign = yalign;
priv->align_set = 1;
maybe_set_alignment (button, GTK_BIN (button)->child);
g_object_freeze_notify (G_OBJECT (button));
g_object_notify (G_OBJECT (button), "xalign");
g_object_notify (G_OBJECT (button), "yalign");
g_object_thaw_notify (G_OBJECT (button));
}
/**
* gtk_button_get_alignment:
* @button: a #GtkButton
* @xalign: return location for horizontal alignment
* @yalign: return location for vertical alignment
*
* Gets the alignment of the child in the button.
*
* Since: 2.4
*/
void
gtk_button_get_alignment (GtkButton *button,
gfloat *xalign,
gfloat *yalign)
{
GtkButtonPrivate *priv;
g_return_if_fail (GTK_IS_BUTTON (button));
priv = GTK_BUTTON_GET_PRIVATE (button);
if (xalign)
*xalign = priv->xalign;
if (yalign)
*yalign = priv->yalign;
}
/**
* _gtk_button_set_depressed:
* @button: a #GtkButton
* @depressed: %TRUE if the button should be drawn with a recessed shadow.
*
* Sets whether the button is currently drawn as down or not. This is
* purely a visual setting, and is meant only for use by derived widgets
* such as #GtkToggleButton.
**/
void
_gtk_button_set_depressed (GtkButton *button,
gboolean depressed)
{
GtkWidget *widget = GTK_WIDGET (button);
depressed = depressed != FALSE;
if (depressed != button->depressed)
{
button->depressed = depressed;
gtk_widget_queue_resize (widget);
}
}
static void
gtk_button_update_state (GtkButton *button)
{
gboolean depressed;
GtkStateType new_state;
if (button->activate_timeout)
depressed = button->depress_on_activate;
else
depressed = button->in_button && button->button_down;
if (button->in_button && (!button->button_down || !depressed))
new_state = GTK_STATE_PRELIGHT;
else
new_state = depressed ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL;
_gtk_button_set_depressed (button, depressed);
gtk_widget_set_state (GTK_WIDGET (button), new_state);
}
static void
show_image_change_notify (GtkButton *button)
{
GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (button);
if (priv->image)
g_object_set (priv->image, "visible", show_image (button), NULL);
}
static void
gtk_button_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (widget);
GtkSettings *settings;
if (gtk_widget_has_screen (widget))
settings = gtk_widget_get_settings (widget);
else
settings = NULL;
if (settings == priv->settings)
return;
if (priv->settings)
{
g_signal_handler_disconnect (priv->settings, priv->show_image_connection);
g_object_unref (priv->settings);
}
if (settings)
{
priv->show_image_connection =
g_signal_connect_swapped (settings,
"notify::gtk-button-images",
G_CALLBACK (show_image_change_notify),
widget);
g_object_ref (settings);
priv->settings = settings;
}
else
priv->settings = NULL;
show_image_change_notify (GTK_BUTTON (widget));
}
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