gtk2/gtk/gtklistitemwidget.c

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/*
* Copyright © 2018 Benjamin Otte
*
* 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 2.1 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/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtklistitemwidgetprivate.h"
#include "gtkbinlayout.h"
#include "gtkeventcontrollerfocus.h"
#include "gtkeventcontrollermotion.h"
#include "gtkgestureclick.h"
#include "gtkintl.h"
#include "gtklistitemfactoryprivate.h"
#include "gtklistitemprivate.h"
#include "gtklistbaseprivate.h"
#include "gtkmain.h"
#include "gtkselectionmodel.h"
#include "gtkwidget.h"
#include "gtkwidgetprivate.h"
typedef struct _GtkListItemWidgetPrivate GtkListItemWidgetPrivate;
struct _GtkListItemWidgetPrivate
{
GtkListItemFactory *factory;
GtkListItem *list_item;
GObject *item;
guint position;
gboolean selected;
gboolean single_click_activate;
};
enum {
PROP_0,
PROP_FACTORY,
PROP_SINGLE_CLICK_ACTIVATE,
N_PROPS
};
enum
{
ACTIVATE_SIGNAL,
LAST_SIGNAL
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkListItemWidget, gtk_list_item_widget, GTK_TYPE_WIDGET)
static GParamSpec *properties[N_PROPS] = { NULL, };
static guint signals[LAST_SIGNAL] = { 0 };
static void
gtk_list_item_widget_activate_signal (GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
if (priv->list_item && !priv->list_item->activatable)
return;
gtk_widget_activate_action (GTK_WIDGET (self),
"list.activate-item",
"u",
priv->position);
}
static gboolean
gtk_list_item_widget_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkWidget *child, *focus_child;
/* The idea of this function is the following:
* 1. If any child can take focus, do not ever attempt
* to take focus.
* 2. Otherwise, if this item is selectable or activatable,
* allow focusing this widget.
*
* This makes sure every item in a list is focusable for
* activation and selection handling, but no useless widgets
* get focused and moving focus is as fast as possible.
*/
focus_child = gtk_widget_get_focus_child (widget);
if (focus_child && gtk_widget_child_focus (focus_child, direction))
return TRUE;
for (child = focus_child ? gtk_widget_get_next_sibling (focus_child)
: gtk_widget_get_first_child (widget);
child;
child = gtk_widget_get_next_sibling (child))
{
if (gtk_widget_child_focus (child, direction))
return TRUE;
}
if (focus_child)
return FALSE;
if (gtk_widget_is_focus (widget))
return FALSE;
return gtk_widget_grab_focus (widget);
}
static gboolean
gtk_list_item_widget_grab_focus (GtkWidget *widget)
{
GtkListItemWidget *self = GTK_LIST_ITEM_WIDGET (widget);
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GtkWidget *child;
for (child = gtk_widget_get_first_child (widget);
child;
child = gtk_widget_get_next_sibling (child))
{
if (gtk_widget_grab_focus (child))
return TRUE;
}
if (priv->list_item == NULL ||
!priv->list_item->selectable)
return FALSE;
return GTK_WIDGET_CLASS (gtk_list_item_widget_parent_class)->grab_focus (widget);
}
static void
gtk_list_item_widget_setup_func (gpointer object,
gpointer data)
{
GtkListItemWidget *self = data;
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GtkListItem *list_item = object;
priv->list_item = list_item;
list_item->owner = self;
if (list_item->child)
gtk_list_item_widget_add_child (self, list_item->child);
gtk_list_item_widget_set_activatable (self, list_item->activatable);
gtk_list_item_do_notify (list_item,
priv->item != NULL,
priv->position != GTK_INVALID_LIST_POSITION,
priv->selected);
}
static void
gtk_list_item_widget_setup_factory (GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GtkListItem *list_item;
list_item = gtk_list_item_new ();
gtk_list_item_factory_setup (priv->factory,
G_OBJECT (list_item),
priv->item != NULL,
gtk_list_item_widget_setup_func,
self);
g_assert (priv->list_item == list_item);
}
static void
gtk_list_item_widget_teardown_func (gpointer object,
gpointer data)
{
GtkListItemWidget *self = data;
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GtkListItem *list_item = object;
g_assert (priv->list_item == list_item);
priv->list_item = NULL;
list_item->owner = NULL;
if (list_item->child)
gtk_list_item_widget_remove_child (self, list_item->child);
gtk_list_item_widget_set_activatable (self, FALSE);
gtk_list_item_do_notify (list_item,
priv->item != NULL,
priv->position != GTK_INVALID_LIST_POSITION,
priv->selected);
gtk_list_item_set_child (list_item, NULL);
}
static void
gtk_list_item_widget_teardown_factory (GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GtkListItem *list_item = priv->list_item;
gtk_list_item_factory_teardown (priv->factory,
G_OBJECT (list_item),
priv->item != NULL,
gtk_list_item_widget_teardown_func,
self);
g_assert (priv->list_item == NULL);
g_object_unref (list_item);
}
static void
gtk_list_item_widget_root (GtkWidget *widget)
{
GtkListItemWidget *self = GTK_LIST_ITEM_WIDGET (widget);
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GTK_WIDGET_CLASS (gtk_list_item_widget_parent_class)->root (widget);
if (priv->factory)
gtk_list_item_widget_setup_factory (self);
}
static void
gtk_list_item_widget_unroot (GtkWidget *widget)
{
GtkListItemWidget *self = GTK_LIST_ITEM_WIDGET (widget);
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GTK_WIDGET_CLASS (gtk_list_item_widget_parent_class)->unroot (widget);
if (priv->list_item)
gtk_list_item_widget_teardown_factory (self);
}
static void
gtk_list_item_widget_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkListItemWidget *self = GTK_LIST_ITEM_WIDGET (object);
switch (property_id)
{
case PROP_FACTORY:
gtk_list_item_widget_set_factory (self, g_value_get_object (value));
break;
case PROP_SINGLE_CLICK_ACTIVATE:
gtk_list_item_widget_set_single_click_activate (self, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_list_item_widget_dispose (GObject *object)
{
GtkListItemWidget *self = GTK_LIST_ITEM_WIDGET (object);
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
g_assert (priv->list_item == NULL);
g_clear_object (&priv->item);
g_clear_object (&priv->factory);
G_OBJECT_CLASS (gtk_list_item_widget_parent_class)->dispose (object);
}
static void
gtk_list_item_widget_select_action (GtkWidget *widget,
const char *action_name,
GVariant *parameter)
{
GtkListItemWidget *self = GTK_LIST_ITEM_WIDGET (widget);
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
gboolean modify, extend;
if (priv->list_item && !priv->list_item->selectable)
return;
g_variant_get (parameter, "(bb)", &modify, &extend);
gtk_widget_activate_action (GTK_WIDGET (self),
"list.select-item",
"(ubb)",
priv->position, modify, extend);
}
static void
gtk_list_item_widget_class_init (GtkListItemWidgetClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
klass->activate_signal = gtk_list_item_widget_activate_signal;
widget_class->focus = gtk_list_item_widget_focus;
widget_class->grab_focus = gtk_list_item_widget_grab_focus;
widget_class->root = gtk_list_item_widget_root;
widget_class->unroot = gtk_list_item_widget_unroot;
gobject_class->set_property = gtk_list_item_widget_set_property;
gobject_class->dispose = gtk_list_item_widget_dispose;
properties[PROP_FACTORY] =
g_param_spec_object ("factory", NULL, NULL,
GTK_TYPE_LIST_ITEM_FACTORY,
G_PARAM_WRITABLE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
properties[PROP_SINGLE_CLICK_ACTIVATE] =
g_param_spec_boolean ("single-click-activate", NULL, NULL,
FALSE,
G_PARAM_WRITABLE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class, N_PROPS, properties);
signals[ACTIVATE_SIGNAL] =
g_signal_new (I_("activate-keybinding"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkListItemWidgetClass, activate_signal),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
gtk_widget_class_set_activate_signal (widget_class, signals[ACTIVATE_SIGNAL]);
/**
* GtkListItem|listitem.select:
* @modify: %TRUE to toggle the existing selection, %FALSE to select
* @extend: %TRUE to extend the selection
*
* Changes selection if the item is selectable.
* If the item is not selectable, nothing happens.
*
* This function will emit the list.select-item action and the resulting
* behavior, in particular the interpretation of @modify and @extend
* depends on the view containing this listitem. See for example
* GtkListView|list.select-item or GtkGridView|list.select-item.
*/
gtk_widget_class_install_action (widget_class,
"listitem.select",
"(bb)",
gtk_list_item_widget_select_action);
gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_Return, 0,
"activate-keybinding", 0);
gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_ISO_Enter, 0,
"activate-keybinding", 0);
gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_KP_Enter, 0,
"activate-keybinding", 0);
/* note that some of these may get overwritten by child widgets,
* such as GtkTreeExpander */
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_space, 0,
"listitem.select", "(bb)", TRUE, FALSE);
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_space, GDK_CONTROL_MASK,
"listitem.select", "(bb)", TRUE, FALSE);
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_space, GDK_SHIFT_MASK,
"listitem.select", "(bb)", TRUE, FALSE);
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_space, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
"listitem.select", "(bb)", TRUE, FALSE);
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_KP_Space, 0,
"listitem.select", "(bb)", TRUE, FALSE);
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_KP_Space, GDK_CONTROL_MASK,
"listitem.select", "(bb)", TRUE, FALSE);
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_KP_Space, GDK_SHIFT_MASK,
"listitem.select", "(bb)", TRUE, FALSE);
gtk_widget_class_add_binding_action (widget_class, GDK_KEY_KP_Space, GDK_CONTROL_MASK | GDK_SHIFT_MASK,
"listitem.select", "(bb)", TRUE, FALSE);
/* This gets overwritten by gtk_list_item_widget_new() but better safe than sorry */
gtk_widget_class_set_css_name (widget_class, I_("row"));
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
}
static void
gtk_list_item_widget_click_gesture_pressed (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GtkWidget *widget = GTK_WIDGET (self);
if (priv->list_item && !priv->list_item->selectable && !priv->list_item->activatable)
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
return;
}
if (!priv->list_item || priv->list_item->activatable)
{
if (n_press == 2 && !priv->single_click_activate)
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
gtk_widget_activate_action (GTK_WIDGET (self),
"list.activate-item",
"u",
priv->position);
}
}
gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_ACTIVE, FALSE);
if (gtk_widget_get_focus_on_click (widget))
gtk_widget_grab_focus (widget);
}
static void
gtk_list_item_widget_click_gesture_released (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
if (!priv->list_item || priv->list_item->activatable)
{
if (n_press == 1 && priv->single_click_activate)
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
gtk_widget_activate_action (GTK_WIDGET (self),
"list.activate-item",
"u",
priv->position);
return;
}
}
if (!priv->list_item || priv->list_item->selectable)
{
GdkModifierType state;
GdkEvent *event;
gboolean extend, modify;
event = gtk_gesture_get_last_event (GTK_GESTURE (gesture),
gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture)));
state = gdk_event_get_modifier_state (event);
extend = (state & GDK_SHIFT_MASK) != 0;
modify = (state & GDK_CONTROL_MASK) != 0;
gtk_widget_activate_action (GTK_WIDGET (self),
"list.select-item",
"(ubb)",
priv->position, modify, extend);
}
gtk_widget_unset_state_flags (GTK_WIDGET (self), GTK_STATE_FLAG_ACTIVE);
}
static void
gtk_list_item_widget_enter_cb (GtkEventControllerFocus *controller,
GtkListItemWidget *self)
{
GtkWidget *widget = GTK_WIDGET (self);
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
gtk_widget_activate_action (widget,
"list.scroll-to-item",
"u",
priv->position);
}
static void
gtk_list_item_widget_hover_cb (GtkEventControllerMotion *controller,
double x,
double y,
GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
if (!priv->single_click_activate)
return;
if (!priv->list_item || priv->list_item->selectable)
{
gtk_widget_activate_action (GTK_WIDGET (self),
"list.select-item",
"(ubb)",
priv->position, FALSE, FALSE);
}
}
static void
gtk_list_item_widget_click_gesture_canceled (GtkGestureClick *gesture,
GdkEventSequence *sequence,
GtkListItemWidget *self)
{
gtk_widget_unset_state_flags (GTK_WIDGET (self), GTK_STATE_FLAG_ACTIVE);
}
static void
gtk_list_item_widget_init (GtkListItemWidget *self)
{
GtkEventController *controller;
GtkGesture *gesture;
gtk_widget_set_focusable (GTK_WIDGET (self), TRUE);
gesture = gtk_gesture_click_new ();
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (gesture),
GTK_PHASE_BUBBLE);
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (gesture),
FALSE);
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture),
GDK_BUTTON_PRIMARY);
g_signal_connect (gesture, "pressed",
G_CALLBACK (gtk_list_item_widget_click_gesture_pressed), self);
g_signal_connect (gesture, "released",
G_CALLBACK (gtk_list_item_widget_click_gesture_released), self);
g_signal_connect (gesture, "cancel",
G_CALLBACK (gtk_list_item_widget_click_gesture_canceled), self);
gtk_widget_add_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (gesture));
controller = gtk_event_controller_focus_new ();
g_signal_connect (controller, "enter", G_CALLBACK (gtk_list_item_widget_enter_cb), self);
gtk_widget_add_controller (GTK_WIDGET (self), controller);
controller = gtk_event_controller_motion_new ();
g_signal_connect (controller, "enter", G_CALLBACK (gtk_list_item_widget_hover_cb), self);
gtk_widget_add_controller (GTK_WIDGET (self), controller);
}
GtkWidget *
gtk_list_item_widget_new (GtkListItemFactory *factory,
const char *css_name,
GtkAccessibleRole role)
{
g_return_val_if_fail (css_name != NULL, NULL);
return g_object_new (GTK_TYPE_LIST_ITEM_WIDGET,
"css-name", css_name,
"accessible-role", role,
"factory", factory,
NULL);
}
typedef struct {
GtkListItemWidget *widget;
guint position;
gpointer item;
gboolean selected;
} GtkListItemWidgetUpdate;
static void
gtk_list_item_widget_update_func (gpointer object,
gpointer data)
{
GtkListItemWidgetUpdate *update = data;
GtkListItem *list_item = object;
/* Track notify manually instead of freeze/thaw_notify for performance reasons. */
gboolean notify_item = FALSE, notify_position = FALSE, notify_selected = FALSE;
GtkListItemWidget *self = update->widget;
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
/* FIXME: It's kinda evil to notify external objects from here... */
if (g_set_object (&priv->item, update->item))
notify_item = TRUE;
if (priv->position != update->position)
{
priv->position = update->position;
notify_position = TRUE;
}
if (priv->selected != update->selected)
{
priv->selected = update->selected;
notify_selected = TRUE;
}
if (list_item)
gtk_list_item_do_notify (list_item, notify_item, notify_position, notify_selected);
}
void
gtk_list_item_widget_update (GtkListItemWidget *self,
guint position,
gpointer item,
gboolean selected)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
GtkListItemWidgetUpdate update = { self, position, item, selected };
gboolean was_selected;
was_selected = priv->selected;
if (priv->list_item)
{
gtk_list_item_factory_update (priv->factory,
G_OBJECT (priv->list_item),
priv->item != NULL,
item != NULL,
gtk_list_item_widget_update_func,
&update);
}
else
{
gtk_list_item_widget_update_func (NULL, &update);
}
/* don't look at selected variable, it's not reentrancy safe */
if (was_selected != priv->selected)
{
if (priv->selected)
gtk_widget_set_state_flags (GTK_WIDGET (self), GTK_STATE_FLAG_SELECTED, FALSE);
else
gtk_widget_unset_state_flags (GTK_WIDGET (self), GTK_STATE_FLAG_SELECTED);
gtk_accessible_update_state (GTK_ACCESSIBLE (self),
GTK_ACCESSIBLE_STATE_SELECTED, priv->selected,
-1);
}
}
void
gtk_list_item_widget_set_factory (GtkListItemWidget *self,
GtkListItemFactory *factory)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
if (priv->factory == factory)
return;
if (priv->factory)
{
if (priv->list_item)
gtk_list_item_widget_teardown_factory (self);
g_clear_object (&priv->factory);
}
if (factory)
{
priv->factory = g_object_ref (factory);
if (gtk_widget_get_root (GTK_WIDGET (self)))
gtk_list_item_widget_setup_factory (self);
}
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_FACTORY]);
}
void
gtk_list_item_widget_set_single_click_activate (GtkListItemWidget *self,
gboolean single_click_activate)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
if (priv->single_click_activate == single_click_activate)
return;
priv->single_click_activate = single_click_activate;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SINGLE_CLICK_ACTIVATE]);
}
void
gtk_list_item_widget_set_activatable (GtkListItemWidget *self,
gboolean activatable)
{
if (activatable)
gtk_widget_add_css_class (GTK_WIDGET (self), "activatable");
else
gtk_widget_remove_css_class (GTK_WIDGET (self), "activatable");
}
void
gtk_list_item_widget_add_child (GtkListItemWidget *self,
GtkWidget *child)
{
gtk_widget_set_parent (child, GTK_WIDGET (self));
}
void
gtk_list_item_widget_reorder_child (GtkListItemWidget *self,
GtkWidget *child,
guint position)
{
GtkWidget *widget = GTK_WIDGET (self);
GtkWidget *sibling = NULL;
if (position > 0)
{
GtkWidget *c;
guint i;
for (c = gtk_widget_get_first_child (widget), i = 0;
c;
c = gtk_widget_get_next_sibling (c), i++)
{
if (i + 1 == position)
{
sibling = c;
break;
}
}
}
if (child != sibling)
gtk_widget_insert_after (child, widget, sibling);
}
void
gtk_list_item_widget_remove_child (GtkListItemWidget *self,
GtkWidget *child)
{
gtk_widget_unparent (child);
}
GtkListItem *
gtk_list_item_widget_get_list_item (GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
return priv->list_item;
}
guint
gtk_list_item_widget_get_position (GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
return priv->position;
}
gpointer
gtk_list_item_widget_get_item (GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
return priv->item;
}
gboolean
gtk_list_item_widget_get_selected (GtkListItemWidget *self)
{
GtkListItemWidgetPrivate *priv = gtk_list_item_widget_get_instance_private (self);
return priv->selected;
}