gtk2/gtk/gtkaccellabel.c
Matthias Clasen 632524f679 Reinstate expected focus behavior
After the :can-focus change in the previous commit, widgets
need to set suitable focus and grab_focus implementations
to implement the desired focus behavior.

This commit does that for all widgets.
2020-04-09 17:50:29 -04:00

436 lines
13 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* GtkAccelLabel: GtkLabel with accelerator monitoring facilities.
* Copyright (C) 1998 Tim Janik
*
* 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/.
*/
#include "config.h"
#include <string.h>
#include "gtklabel.h"
#include "gtkaccellabelprivate.h"
#include "gtkintl.h"
#include "gtkmain.h"
#include "gtkprivate.h"
#include "gtksizerequest.h"
#include "gtkstylecontextprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkboxlayout.h"
/**
* SECTION:gtkaccellabel
* @Short_description: A label which displays an accelerator key on the right of the text
* @Title: GtkAccelLabel
* @See_also: #GtkAccelGroup
*
* The #GtkAccelLabel is a widget that shows an accelerator next to a description
* of said accelerator, e.g. “Save Document Ctrl+S”.
* It is commonly used in menus to show the keyboard short-cuts for commands.
*
* The accelerator key to display is typically not set explicitly (although it
* can be, with gtk_accel_label_set_accel()). Instead, the #GtkAccelLabel displays
* the accelerators which have been added to a particular widget. This widget is
* set by calling gtk_accel_label_set_accel_widget().
*
* For example, a menu item may have an accelerator added to emit
* the “activate” signal when the “Ctrl+S” key combination is pressed.
* A #GtkAccelLabel is created and added to the menu item widget, and
* gtk_accel_label_set_accel_widget() is called with the item as the
* second argument. The #GtkAccelLabel will now display “Ctrl+S” after its label.
*
* Note that accel labels are typically set up automatically when menus
* are created.
*
* A #GtkAccelLabel will only display accelerators which have %GTK_ACCEL_VISIBLE
* set (see #GtkAccelFlags).
* A #GtkAccelLabel can display multiple accelerators and even signal names,
* though it is almost always used to display just one accelerator key.
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* accellabel
* ├── label
* ╰── accelerator
* ]|
*
* #GtkAccelLabel has a main CSS node with the name accellabel.
* It contains the two child nodes with name label and accelerator.
*/
enum {
PROP_0,
PROP_LABEL,
PROP_USE_UNDERLINE,
LAST_PROP
};
struct _GtkAccelLabel
{
GtkWidget parent_instance;
GtkWidget *text_label;
GtkWidget *accel_label;
guint accel_key; /* manual accel key specification if != 0 */
GdkModifierType accel_mods;
};
struct _GtkAccelLabelClass
{
GtkWidgetClass parent_class;
};
GParamSpec *props[LAST_PROP] = { NULL, };
static void gtk_accel_label_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_accel_label_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_accel_label_finalize (GObject *object);
G_DEFINE_TYPE (GtkAccelLabel, gtk_accel_label, GTK_TYPE_WIDGET)
static void
gtk_accel_label_class_init (GtkAccelLabelClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
gobject_class->finalize = gtk_accel_label_finalize;
gobject_class->set_property = gtk_accel_label_set_property;
gobject_class->get_property = gtk_accel_label_get_property;
widget_class->focus = gtk_widget_focus_none;
widget_class->grab_focus = gtk_widget_grab_focus_none;
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_ACCEL_LABEL);
props[PROP_LABEL] =
g_param_spec_string ("label",
P_("Label"),
P_("The text displayed next to the accelerator"),
"",
GTK_PARAM_READWRITE);
props[PROP_USE_UNDERLINE] =
g_param_spec_boolean ("use-underline",
P_("Use underline"),
P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, LAST_PROP, props);
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BOX_LAYOUT);
gtk_widget_class_set_css_name (widget_class, I_("accellabel"));
}
static void
gtk_accel_label_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
switch (prop_id)
{
case PROP_LABEL:
gtk_accel_label_set_label (accel_label, g_value_get_string (value));
break;
case PROP_USE_UNDERLINE:
gtk_accel_label_set_use_underline (accel_label, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_accel_label_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
switch (prop_id)
{
case PROP_LABEL:
g_value_set_string (value, gtk_accel_label_get_label (accel_label));
break;
case PROP_USE_UNDERLINE:
g_value_set_boolean (value, gtk_accel_label_get_use_underline (accel_label));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_accel_label_init (GtkAccelLabel *accel_label)
{
accel_label->text_label = gtk_label_new ("");
gtk_widget_set_hexpand (accel_label->text_label, TRUE);
gtk_label_set_xalign (GTK_LABEL (accel_label->text_label), 0.0f);
accel_label->accel_label = g_object_new (GTK_TYPE_LABEL,
"css-name", "accelerator",
NULL);
gtk_widget_set_parent (accel_label->text_label, GTK_WIDGET (accel_label));
gtk_widget_set_parent (accel_label->accel_label, GTK_WIDGET (accel_label));
}
/**
* gtk_accel_label_new:
* @string: the label string. Must be non-%NULL.
*
* Creates a new #GtkAccelLabel.
*
* Returns: a new #GtkAccelLabel.
*/
GtkWidget *
gtk_accel_label_new (const gchar *string)
{
return g_object_new (GTK_TYPE_ACCEL_LABEL,
"label", string,
NULL);
}
static void
gtk_accel_label_finalize (GObject *object)
{
GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
gtk_widget_unparent (accel_label->accel_label);
gtk_widget_unparent (accel_label->text_label);
G_OBJECT_CLASS (gtk_accel_label_parent_class)->finalize (object);
}
/**
* gtk_accel_label_get_accel_width:
* @accel_label: a #GtkAccelLabel.
*
* Returns the width needed to display the accelerator key(s).
* This is used by menus to align all of the menu item widgets,
* and shouldn't be needed by applications.
*
* Returns: the width needed to display the accelerator key(s).
*/
guint
gtk_accel_label_get_accel_width (GtkAccelLabel *accel_label)
{
int min;
g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), 0);
gtk_widget_measure (accel_label->accel_label, GTK_ORIENTATION_HORIZONTAL, -1,
&min, NULL, NULL, NULL);
return min;
}
/**
* gtk_accel_label_refetch:
* @accel_label: a #GtkAccelLabel.
*
* Recreates the string representing the accelerator keys.
* This should not be needed since the string is automatically updated whenever
* accelerators are added or removed from the associated widget.
*
* Returns: always returns %FALSE.
*/
gboolean
gtk_accel_label_refetch (GtkAccelLabel *accel_label)
{
gboolean enable_accels;
char *accel_string = NULL;
g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), FALSE);
g_object_get (gtk_widget_get_settings (GTK_WIDGET (accel_label)),
"gtk-enable-accels", &enable_accels,
NULL);
if (enable_accels && accel_label->accel_key)
{
gboolean have_accel = FALSE;
guint accel_key;
GdkModifierType accel_mods;
/* First check for a manual accel set with _set_accel() */
if (accel_label->accel_key)
{
accel_mods = accel_label->accel_mods;
accel_key = accel_label->accel_key;
have_accel = TRUE;
}
/* If we found a key using either method, set it */
if (have_accel)
accel_string = gtk_accelerator_get_label (accel_key, accel_mods);
else
/* Otherwise we have a closure with no key. Show "-/-". */
accel_string = g_strdup ("-/-");
}
if (!accel_string)
accel_string = g_strdup ("");
gtk_label_set_label (GTK_LABEL (accel_label->accel_label), accel_string);
g_free (accel_string);
return FALSE;
}
/**
* gtk_accel_label_set_accel:
* @accel_label: a #GtkAccelLabel
* @accelerator_key: a keyval, or 0
* @accelerator_mods: the modifier mask for the accel
*
* Manually sets a keyval and modifier mask as the accelerator rendered
* by @accel_label.
*
* If a keyval and modifier are explicitly set then these values are
* used regardless of any associated accel closure or widget.
*
* Providing an @accelerator_key of 0 removes the manual setting.
*/
void
gtk_accel_label_set_accel (GtkAccelLabel *accel_label,
guint accelerator_key,
GdkModifierType accelerator_mods)
{
g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
accel_label->accel_key = accelerator_key;
accel_label->accel_mods = accelerator_mods;
gtk_accel_label_refetch (accel_label);
}
/**
* gtk_accel_label_get_accel:
* @accel_label: a #GtkAccelLabel
* @accelerator_key: (out): return location for the keyval
* @accelerator_mods: (out): return location for the modifier mask
*
* Gets the keyval and modifier mask set with
* gtk_accel_label_set_accel().
*/
void
gtk_accel_label_get_accel (GtkAccelLabel *accel_label,
guint *accelerator_key,
GdkModifierType *accelerator_mods)
{
g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
*accelerator_key = accel_label->accel_key;
*accelerator_mods = accel_label->accel_mods;
}
/**
* gtk_accel_label_set_label:
* @accel_label: a #GtkAccelLabel
* @text: The new label text
*
* Sets the label part of the accel label.
*
*/
void
gtk_accel_label_set_label (GtkAccelLabel *accel_label,
const char *text)
{
g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
gtk_label_set_text_with_mnemonic (GTK_LABEL (accel_label->text_label), text);
}
/**
* gtk_accel_label_get_label:
* @accel_label: a #GtkAccelLabel
*
* Returns the current label, set via gtk_accel_label_set_label()
*
* Returns: (transfer none): @accel_label's label
*
*/
const char *
gtk_accel_label_get_label (GtkAccelLabel *accel_label)
{
g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), NULL);
return gtk_label_get_label (GTK_LABEL (accel_label->text_label));
}
/**
* gtk_accel_label_set_use_underline:
* @accel_label: a #GtkAccelLabel
* @setting: Whether to use underlines in the label or not
*
* Controls whether to interpret underscores in the text label of @accel_label
* as mnemonic indicators. See also gtk_label_set_use_underline()
*/
void
gtk_accel_label_set_use_underline (GtkAccelLabel *accel_label,
gboolean setting)
{
g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
if (setting == gtk_label_get_use_underline (GTK_LABEL (accel_label->text_label)))
return;
gtk_label_set_use_underline (GTK_LABEL (accel_label->text_label), setting);
g_object_notify_by_pspec (G_OBJECT (accel_label), props[PROP_USE_UNDERLINE]);
}
/**
* gtk_accel_label_get_use_underline:
* @accel_label: a #GtkAccelLabel
*
* Returns whether the accel label interprets underscores in it's
* label property as mnemonic indicators.
* See gtk_accel_label_set_use_underline() and gtk_label_set_use_underline();
*
* Returns: whether the accel label uses mnemonic underlines
*/
gboolean
gtk_accel_label_get_use_underline (GtkAccelLabel *accel_label)
{
g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), FALSE);
return gtk_label_get_use_underline (GTK_LABEL (accel_label->text_label));
}