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gtk2/gtk/gtkcellrendereraccel.c
Jasper St. Pierre fe5402d32e gtkcellrendereraccel: Use a GtkInvisible to grab on 
Grabbing on a non-toplevel might not do what we want it to do, since it
will go on the focused widget, not the grabbed widget. Since we don't
focus the widget before clicking on it, that means that putting the
focus somewhere else and then clicking on the accelerator editor will
freeze the app. Additionally, since it's a global system grab that can't
be exited except by a key press that we won't ever get, it effectively
locks up your system as well unless you know how to break the grab or
kill the app. Ouch.

Since doing a device grab on a non-toplevel is generally considered a
bad idea, just don't do it. Use a GtkInvisible and take a grab on that
instead.
2014-06-29 20:56:40 -04:00

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/* gtkcellrendereraccel.h
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcellrendereraccel.h"
#include "gtkintl.h"
#include "gtkaccelgroup.h"
#include "gtkmarshalers.h"
#include "gtklabel.h"
#include "gtkeventbox.h"
#include "gtkmain.h"
#include "gtksizerequest.h"
#include "gtktypebuiltins.h"
#include "gtkinvisible.h"
#include "gtkprivate.h"
/**
* SECTION:gtkcellrendereraccel
* @Short_description: Renders a keyboard accelerator in a cell
* @Title: GtkCellRendererAccel
*
* #GtkCellRendererAccel displays a keyboard accelerator (i.e. a
* key combination like `Control + a`.
* If the cell renderer is editable, the accelerator can be changed by
* simply typing the new combination.
*
* The #GtkCellRendererAccel cell renderer was added in GTK+ 2.10.
*/
static void gtk_cell_renderer_accel_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_accel_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_accel_get_preferred_width
(GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static GtkCellEditable *
gtk_cell_renderer_accel_start_editing (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
static gchar *convert_keysym_state_to_string (GtkCellRendererAccel *accel,
guint keysym,
GdkModifierType mask,
guint keycode);
enum {
ACCEL_EDITED,
ACCEL_CLEARED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_ACCEL_KEY,
PROP_ACCEL_MODS,
PROP_KEYCODE,
PROP_ACCEL_MODE
};
struct _GtkCellRendererAccelPrivate
{
GtkWidget *edit_widget;
GtkWidget *sizing_label;
GtkWidget *grab_invisible;
GdkDevice *grab_keyboard;
GdkDevice *grab_pointer;
GtkCellRendererAccelMode accel_mode;
GdkModifierType accel_mods;
guint accel_key;
guint keycode;
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_PRIVATE (GtkCellRendererAccel, gtk_cell_renderer_accel, GTK_TYPE_CELL_RENDERER_TEXT)
static void
gtk_cell_renderer_accel_init (GtkCellRendererAccel *cell_accel)
{
gchar *text;
cell_accel->priv = gtk_cell_renderer_accel_get_instance_private (cell_accel);
text = convert_keysym_state_to_string (cell_accel, 0, 0, 0);
g_object_set (cell_accel, "text", text, NULL);
g_free (text);
}
static void
gtk_cell_renderer_accel_class_init (GtkCellRendererAccelClass *cell_accel_class)
{
GObjectClass *object_class;
GtkCellRendererClass *cell_renderer_class;
object_class = G_OBJECT_CLASS (cell_accel_class);
cell_renderer_class = GTK_CELL_RENDERER_CLASS (cell_accel_class);
object_class->set_property = gtk_cell_renderer_accel_set_property;
object_class->get_property = gtk_cell_renderer_accel_get_property;
cell_renderer_class->get_preferred_width = gtk_cell_renderer_accel_get_preferred_width;
cell_renderer_class->start_editing = gtk_cell_renderer_accel_start_editing;
/**
* GtkCellRendererAccel:accel-key:
*
* The keyval of the accelerator.
*
* Since: 2.10
*/
g_object_class_install_property (object_class,
PROP_ACCEL_KEY,
g_param_spec_uint ("accel-key",
P_("Accelerator key"),
P_("The keyval of the accelerator"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkCellRendererAccel:accel-mods:
*
* The modifier mask of the accelerator.
*
* Since: 2.10
*/
g_object_class_install_property (object_class,
PROP_ACCEL_MODS,
g_param_spec_flags ("accel-mods",
P_("Accelerator modifiers"),
P_("The modifier mask of the accelerator"),
GDK_TYPE_MODIFIER_TYPE,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkCellRendererAccel:keycode:
*
* The hardware keycode of the accelerator. Note that the hardware keycode is
* only relevant if the key does not have a keyval. Normally, the keyboard
* configuration should assign keyvals to all keys.
*
* Since: 2.10
*/
g_object_class_install_property (object_class,
PROP_KEYCODE,
g_param_spec_uint ("keycode",
P_("Accelerator keycode"),
P_("The hardware keycode of the accelerator"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkCellRendererAccel:accel-mode:
*
* Determines if the edited accelerators are GTK+ accelerators. If
* they are, consumed modifiers are suppressed, only accelerators
* accepted by GTK+ are allowed, and the accelerators are rendered
* in the same way as they are in menus.
*
* Since: 2.10
*/
g_object_class_install_property (object_class,
PROP_ACCEL_MODE,
g_param_spec_enum ("accel-mode",
P_("Accelerator Mode"),
P_("The type of accelerators"),
GTK_TYPE_CELL_RENDERER_ACCEL_MODE,
GTK_CELL_RENDERER_ACCEL_MODE_GTK,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkCellRendererAccel::accel-edited:
* @accel: the object reveiving the signal
* @path_string: the path identifying the row of the edited cell
* @accel_key: the new accelerator keyval
* @accel_mods: the new acclerator modifier mask
* @hardware_keycode: the keycode of the new accelerator
*
* Gets emitted when the user has selected a new accelerator.
*
* Since: 2.10
*/
signals[ACCEL_EDITED] = g_signal_new (I_("accel-edited"),
GTK_TYPE_CELL_RENDERER_ACCEL,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCellRendererAccelClass, accel_edited),
NULL, NULL,
_gtk_marshal_VOID__STRING_UINT_FLAGS_UINT,
G_TYPE_NONE, 4,
G_TYPE_STRING,
G_TYPE_UINT,
GDK_TYPE_MODIFIER_TYPE,
G_TYPE_UINT);
/**
* GtkCellRendererAccel::accel-cleared:
* @accel: the object reveiving the signal
* @path_string: the path identifying the row of the edited cell
*
* Gets emitted when the user has removed the accelerator.
*
* Since: 2.10
*/
signals[ACCEL_CLEARED] = g_signal_new (I_("accel-cleared"),
GTK_TYPE_CELL_RENDERER_ACCEL,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCellRendererAccelClass, accel_cleared),
NULL, NULL,
g_cclosure_marshal_VOID__STRING,
G_TYPE_NONE, 1,
G_TYPE_STRING);
}
/**
* gtk_cell_renderer_accel_new:
*
* Creates a new #GtkCellRendererAccel.
*
* Returns: the new cell renderer
*
* Since: 2.10
*/
GtkCellRenderer *
gtk_cell_renderer_accel_new (void)
{
return g_object_new (GTK_TYPE_CELL_RENDERER_ACCEL, NULL);
}
static gchar *
convert_keysym_state_to_string (GtkCellRendererAccel *accel,
guint keysym,
GdkModifierType mask,
guint keycode)
{
GtkCellRendererAccelPrivate *priv = accel->priv;
if (keysym == 0 && keycode == 0)
/* This label is displayed in a treeview cell displaying
* a disabled accelerator key combination.
*/
return g_strdup (C_("Accelerator", "Disabled"));
else
{
if (priv->accel_mode == GTK_CELL_RENDERER_ACCEL_MODE_GTK)
{
if (!gtk_accelerator_valid (keysym, mask))
/* This label is displayed in a treeview cell displaying
* an accelerator key combination that is not valid according
* to gtk_accelerator_valid().
*/
return g_strdup (C_("Accelerator", "Invalid"));
return gtk_accelerator_get_label (keysym, mask);
}
else
{
gchar *name;
name = gtk_accelerator_get_label_with_keycode (NULL, keysym, keycode, mask);
if (name == NULL)
name = gtk_accelerator_name_with_keycode (NULL, keysym, keycode, mask);
return name;
}
}
}
static void
gtk_cell_renderer_accel_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRendererAccelPrivate *priv = GTK_CELL_RENDERER_ACCEL (object)->priv;
switch (param_id)
{
case PROP_ACCEL_KEY:
g_value_set_uint (value, priv->accel_key);
break;
case PROP_ACCEL_MODS:
g_value_set_flags (value, priv->accel_mods);
break;
case PROP_KEYCODE:
g_value_set_uint (value, priv->keycode);
break;
case PROP_ACCEL_MODE:
g_value_set_enum (value, priv->accel_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
}
}
static void
gtk_cell_renderer_accel_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRendererAccel *accel = GTK_CELL_RENDERER_ACCEL (object);
GtkCellRendererAccelPrivate *priv = accel->priv;
gboolean changed = FALSE;
switch (param_id)
{
case PROP_ACCEL_KEY:
{
guint accel_key = g_value_get_uint (value);
if (priv->accel_key != accel_key)
{
priv->accel_key = accel_key;
changed = TRUE;
g_object_notify (object, "accel-key");
}
}
break;
case PROP_ACCEL_MODS:
{
guint accel_mods = g_value_get_flags (value);
if (priv->accel_mods != accel_mods)
{
priv->accel_mods = accel_mods;
changed = TRUE;
g_object_notify (object, "accel-mods");
}
}
break;
case PROP_KEYCODE:
{
guint keycode = g_value_get_uint (value);
if (priv->keycode != keycode)
{
priv->keycode = keycode;
changed = TRUE;
g_object_notify (object, "keycode");
}
}
break;
case PROP_ACCEL_MODE:
if (priv->accel_mode != g_value_get_enum (value))
{
priv->accel_mode = g_value_get_enum (value);
g_object_notify (object, "accel-mode");
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
}
if (changed)
{
gchar *text;
text = convert_keysym_state_to_string (accel, priv->accel_key, priv->accel_mods, priv->keycode);
g_object_set (accel, "text", text, NULL);
g_free (text);
}
}
static void
gtk_cell_renderer_accel_get_preferred_width (GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
GtkCellRendererAccelPrivate *priv = GTK_CELL_RENDERER_ACCEL (cell)->priv;
GtkRequisition min_req, nat_req;
if (priv->sizing_label == NULL)
priv->sizing_label = gtk_label_new (_("New accelerator…"));
gtk_widget_get_preferred_size (priv->sizing_label, &min_req, &nat_req);
GTK_CELL_RENDERER_CLASS (gtk_cell_renderer_accel_parent_class)->get_preferred_width (cell, widget,
minimum_size, natural_size);
/* FIXME: need to take the cell_area et al. into account */
if (minimum_size)
*minimum_size = MAX (*minimum_size, min_req.width);
if (natural_size)
*natural_size = MAX (*natural_size, nat_req.width);
}
static gboolean
grab_key_callback (GtkWidget *widget,
GdkEventKey *event,
GtkCellRendererAccel *accel)
{
GtkCellRendererAccelPrivate *priv = accel->priv;
GdkModifierType accel_mods = 0;
guint accel_key;
guint keyval;
gchar *path;
gboolean edited;
gboolean cleared;
GdkModifierType consumed_modifiers;
GdkDisplay *display;
display = gtk_widget_get_display (widget);
if (event->is_modifier)
return TRUE;
edited = FALSE;
cleared = FALSE;
accel_mods = event->state;
if (event->keyval == GDK_KEY_Sys_Req &&
(accel_mods & GDK_MOD1_MASK) != 0)
{
/* HACK: we don't want to use SysRq as a keybinding (but we do
* want Alt+Print), so we avoid translation from Alt+Print to SysRq
*/
keyval = GDK_KEY_Print;
consumed_modifiers = 0;
}
else
{
_gtk_translate_keyboard_accel_state (gdk_keymap_get_for_display (display),
event->hardware_keycode,
event->state,
gtk_accelerator_get_default_mod_mask (),
event->group,
&keyval, NULL, NULL, &consumed_modifiers);
}
accel_key = gdk_keyval_to_lower (keyval);
if (accel_key == GDK_KEY_ISO_Left_Tab)
accel_key = GDK_KEY_Tab;
accel_mods &= gtk_accelerator_get_default_mod_mask ();
/* Filter consumed modifiers
*/
if (priv->accel_mode == GTK_CELL_RENDERER_ACCEL_MODE_GTK)
accel_mods &= ~consumed_modifiers;
/* Put shift back if it changed the case of the key, not otherwise.
*/
if (accel_key != keyval)
accel_mods |= GDK_SHIFT_MASK;
if (accel_mods == 0)
{
switch (keyval)
{
case GDK_KEY_Escape:
goto out; /* cancel */
case GDK_KEY_BackSpace:
/* clear the accelerator on Backspace */
cleared = TRUE;
goto out;
default:
break;
}
}
if (priv->accel_mode == GTK_CELL_RENDERER_ACCEL_MODE_GTK)
{
if (!gtk_accelerator_valid (accel_key, accel_mods))
{
gtk_widget_error_bell (widget);
return TRUE;
}
}
edited = TRUE;
out:
gdk_device_ungrab (priv->grab_keyboard, event->time);
gdk_device_ungrab (priv->grab_pointer, event->time);
path = g_strdup (g_object_get_data (G_OBJECT (priv->edit_widget), "gtk-cell-renderer-text"));
gtk_cell_editable_editing_done (GTK_CELL_EDITABLE (priv->edit_widget));
gtk_cell_editable_remove_widget (GTK_CELL_EDITABLE (priv->edit_widget));
priv->edit_widget = NULL;
priv->grab_keyboard = NULL;
priv->grab_pointer = NULL;
if (edited)
g_signal_emit (accel, signals[ACCEL_EDITED], 0, path,
accel_key, accel_mods, event->hardware_keycode);
else if (cleared)
g_signal_emit (accel, signals[ACCEL_CLEARED], 0, path);
g_free (path);
return TRUE;
}
static void
ungrab_stuff (GtkWidget *widget,
GtkCellRendererAccel *accel)
{
GtkCellRendererAccelPrivate *priv = accel->priv;
gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
priv->grab_keyboard = NULL;
priv->grab_pointer = NULL;
gtk_widget_destroy (priv->grab_invisible);
priv->grab_invisible = NULL;
}
static void
_gtk_cell_editable_event_box_start_editing (GtkCellEditable *cell_editable,
GdkEvent *event)
{
/* do nothing, because we are pointless */
}
static void
_gtk_cell_editable_event_box_cell_editable_init (GtkCellEditableIface *iface)
{
iface->start_editing = _gtk_cell_editable_event_box_start_editing;
}
typedef struct _GtkCellEditableEventBox GtkCellEditableEventBox;
typedef GtkEventBoxClass GtkCellEditableEventBoxClass;
struct _GtkCellEditableEventBox
{
GtkEventBox box;
gboolean editing_canceled;
};
GType _gtk_cell_editable_event_box_get_type (void);
G_DEFINE_TYPE_WITH_CODE (GtkCellEditableEventBox, _gtk_cell_editable_event_box, GTK_TYPE_EVENT_BOX, { \
G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_EDITABLE, _gtk_cell_editable_event_box_cell_editable_init) \
})
enum {
PROP_ZERO,
PROP_EDITING_CANCELED
};
static void
gtk_cell_editable_event_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellEditableEventBox *box = (GtkCellEditableEventBox*)object;
switch (prop_id)
{
case PROP_EDITING_CANCELED:
box->editing_canceled = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_cell_editable_event_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellEditableEventBox *box = (GtkCellEditableEventBox*)object;
switch (prop_id)
{
case PROP_EDITING_CANCELED:
g_value_set_boolean (value, box->editing_canceled);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
_gtk_cell_editable_event_box_class_init (GtkCellEditableEventBoxClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
gobject_class->set_property = gtk_cell_editable_event_box_set_property;
gobject_class->get_property = gtk_cell_editable_event_box_get_property;
g_object_class_override_property (gobject_class,
PROP_EDITING_CANCELED,
"editing-canceled");
}
static void
_gtk_cell_editable_event_box_init (GtkCellEditableEventBox *box)
{
}
static GtkCellEditable *
gtk_cell_renderer_accel_start_editing (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererAccelPrivate *priv;
GtkCellRendererText *celltext;
GtkCellRendererAccel *accel;
GtkStyleContext *context;
GdkRGBA color;
GtkWidget *label;
GtkWidget *eventbox;
GdkDevice *device, *keyb, *pointer;
gboolean editable;
guint32 time;
celltext = GTK_CELL_RENDERER_TEXT (cell);
accel = GTK_CELL_RENDERER_ACCEL (cell);
priv = accel->priv;
/* If the cell isn't editable we return NULL. */
g_object_get (celltext, "editable", &editable, NULL);
if (editable == FALSE)
return NULL;
context = gtk_widget_get_style_context (widget);
if (event)
device = gdk_event_get_device (event);
else
device = gtk_get_current_event_device ();
if (!device)
return NULL;
if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
{
keyb = device;
pointer = gdk_device_get_associated_device (device);
}
else
{
pointer = device;
keyb = gdk_device_get_associated_device (device);
}
time = gdk_event_get_time (event);
priv->grab_invisible = gtk_invisible_new ();
gtk_widget_show (priv->grab_invisible);
if (gdk_device_grab (keyb, gtk_widget_get_window (priv->grab_invisible),
GDK_OWNERSHIP_WINDOW, FALSE,
GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
NULL, time) != GDK_GRAB_SUCCESS)
return NULL;
if (gdk_device_grab (pointer, gtk_widget_get_window (priv->grab_invisible),
GDK_OWNERSHIP_WINDOW, FALSE,
GDK_BUTTON_PRESS_MASK,
NULL, time) != GDK_GRAB_SUCCESS)
{
gdk_device_ungrab (keyb, time);
return NULL;
}
priv->grab_keyboard = keyb;
priv->grab_pointer = pointer;
g_signal_connect (G_OBJECT (priv->grab_invisible), "key-press-event",
G_CALLBACK (grab_key_callback),
accel);
eventbox = g_object_new (_gtk_cell_editable_event_box_get_type (), NULL);
priv->edit_widget = eventbox;
g_object_add_weak_pointer (G_OBJECT (priv->edit_widget),
(gpointer) &priv->edit_widget);
label = gtk_label_new (NULL);
gtk_widget_set_halign (label, GTK_ALIGN_START);
gtk_widget_set_valign (label, GTK_ALIGN_CENTER);
gtk_style_context_get_background_color (context, GTK_STATE_FLAG_SELECTED, &color);
gtk_widget_override_background_color (eventbox, 0, &color);
gtk_style_context_get_color (context, GTK_STATE_FLAG_SELECTED, &color);
gtk_widget_override_color (label, 0, &color);
/* This label is displayed in a treeview cell displaying
* an accelerator when the cell is clicked to change the
* acelerator.
*/
gtk_label_set_text (GTK_LABEL (label), _("New accelerator…"));
gtk_container_add (GTK_CONTAINER (eventbox), label);
g_object_set_data_full (G_OBJECT (priv->edit_widget), "gtk-cell-renderer-text",
g_strdup (path), g_free);
gtk_widget_show_all (priv->edit_widget);
g_signal_connect (priv->edit_widget, "unrealize",
G_CALLBACK (ungrab_stuff), accel);
return GTK_CELL_EDITABLE (priv->edit_widget);
}
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