2010-10-05 14:09:40 +00:00
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* st-focus-manager.c: Keyboard focus manager
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*
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2010-11-10 22:00:45 +00:00
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* Copyright 2010 Red Hat, Inc.
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2010-10-05 14:09:40 +00:00
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*
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2010-11-10 22:00:45 +00:00
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 2.1 of
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* the License, or (at your option) any later version.
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2010-10-05 14:09:40 +00:00
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*
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* This program is distributed in the hope it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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* more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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2010-11-10 22:00:45 +00:00
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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2010-10-05 14:09:40 +00:00
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*/
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/**
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* SECTION:st-focus-manager
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* @short_description: Keyboard focus management
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*
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* #StFocusManager handles keyboard focus for all actors on the stage.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <clutter/clutter.h>
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#include "st-focus-manager.h"
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struct _StFocusManagerPrivate
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{
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GHashTable *groups;
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};
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2015-09-24 16:04:48 +00:00
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G_DEFINE_TYPE_WITH_PRIVATE (StFocusManager, st_focus_manager, G_TYPE_OBJECT)
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2010-10-05 14:09:40 +00:00
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static void
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st_focus_manager_dispose (GObject *object)
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{
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StFocusManager *manager = ST_FOCUS_MANAGER (object);
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if (manager->priv->groups)
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{
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g_hash_table_destroy (manager->priv->groups);
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manager->priv->groups = NULL;
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}
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G_OBJECT_CLASS (st_focus_manager_parent_class)->dispose (object);
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}
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static void
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st_focus_manager_class_init (StFocusManagerClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->dispose = st_focus_manager_dispose;
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}
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static void
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st_focus_manager_init (StFocusManager *manager)
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{
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2015-09-24 16:04:48 +00:00
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manager->priv = st_focus_manager_get_instance_private (manager);
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2010-11-13 22:11:42 +00:00
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manager->priv->groups = g_hash_table_new (NULL, NULL);
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2010-10-05 14:09:40 +00:00
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}
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static gboolean
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st_focus_manager_stage_event (ClutterActor *stage,
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ClutterEvent *event,
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gpointer user_data)
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{
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StFocusManager *manager = user_data;
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2018-11-27 12:58:25 +00:00
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StDirectionType direction;
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2010-10-05 14:09:40 +00:00
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gboolean wrap_around = FALSE;
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ClutterActor *focused, *group;
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if (event->type != CLUTTER_KEY_PRESS)
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return FALSE;
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switch (event->key.keyval)
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{
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case CLUTTER_KEY_Up:
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2018-11-27 12:58:25 +00:00
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direction = ST_DIR_UP;
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2010-10-05 14:09:40 +00:00
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break;
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case CLUTTER_KEY_Down:
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2018-11-27 12:58:25 +00:00
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direction = ST_DIR_DOWN;
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2010-10-05 14:09:40 +00:00
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break;
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case CLUTTER_KEY_Left:
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2018-11-27 12:58:25 +00:00
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direction = ST_DIR_LEFT;
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2010-10-05 14:09:40 +00:00
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break;
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case CLUTTER_KEY_Right:
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2018-11-27 12:58:25 +00:00
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direction = ST_DIR_RIGHT;
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2010-10-05 14:09:40 +00:00
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break;
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case CLUTTER_KEY_Tab:
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if (event->key.modifier_state & CLUTTER_SHIFT_MASK)
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2018-11-27 12:58:25 +00:00
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direction = ST_DIR_TAB_BACKWARD;
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2010-10-05 14:09:40 +00:00
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else
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2018-11-27 12:58:25 +00:00
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direction = ST_DIR_TAB_FORWARD;
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2010-10-05 14:09:40 +00:00
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wrap_around = TRUE;
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break;
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case CLUTTER_KEY_ISO_Left_Tab:
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2018-11-27 12:58:25 +00:00
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direction = ST_DIR_TAB_BACKWARD;
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2010-10-05 14:09:40 +00:00
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wrap_around = TRUE;
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break;
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default:
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return FALSE;
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}
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focused = clutter_stage_get_key_focus (CLUTTER_STAGE (stage));
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if (!focused)
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return FALSE;
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for (group = focused; group != stage; group = clutter_actor_get_parent (group))
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{
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if (g_hash_table_lookup (manager->priv->groups, group))
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{
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return st_widget_navigate_focus (ST_WIDGET (group), focused,
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direction, wrap_around);
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}
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}
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return FALSE;
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}
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/**
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* st_focus_manager_get_for_stage:
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* @stage: a #ClutterStage
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*
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* Gets the #StFocusManager for @stage, creating it if necessary.
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*
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* Return value: (transfer none): the focus manager for @stage
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*/
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StFocusManager *
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st_focus_manager_get_for_stage (ClutterStage *stage)
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{
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StFocusManager *manager;
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manager = g_object_get_data (G_OBJECT (stage), "st-focus-manager");
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if (!manager)
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{
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manager = g_object_new (ST_TYPE_FOCUS_MANAGER, NULL);
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g_object_set_data_full (G_OBJECT (stage), "st-focus-manager",
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manager, g_object_unref);
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g_signal_connect (stage, "event",
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G_CALLBACK (st_focus_manager_stage_event), manager);
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}
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return manager;
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}
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static void
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remove_destroyed_group (ClutterActor *actor,
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gpointer user_data)
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{
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StFocusManager *manager = user_data;
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st_focus_manager_remove_group (manager, ST_WIDGET (actor));
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}
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/**
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* st_focus_manager_add_group:
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* @manager: the #StFocusManager
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* @root: the root container of the group
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*
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* Adds a new focus group to @manager. When the focus is in an actor
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* that is a descendant of @root, @manager will handle moving focus
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* from one actor to another within @root based on keyboard events.
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*/
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void
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st_focus_manager_add_group (StFocusManager *manager,
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StWidget *root)
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{
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2012-09-14 15:55:42 +00:00
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gpointer count_p = g_hash_table_lookup (manager->priv->groups, root);
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int count = count_p ? GPOINTER_TO_INT (count_p) : 0;
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2010-10-05 14:09:40 +00:00
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g_signal_connect (root, "destroy",
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G_CALLBACK (remove_destroyed_group),
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manager);
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2012-09-14 15:55:42 +00:00
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g_hash_table_insert (manager->priv->groups, root, GINT_TO_POINTER (++count));
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2010-10-05 14:09:40 +00:00
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}
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/**
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* st_focus_manager_remove_group:
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* @manager: the #StFocusManager
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* @root: the root container of the group
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*
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* Removes the group rooted at @root from @manager
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*/
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void
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st_focus_manager_remove_group (StFocusManager *manager,
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StWidget *root)
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{
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2012-09-14 15:55:42 +00:00
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gpointer count_p = g_hash_table_lookup (manager->priv->groups, root);
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int count = count_p ? GPOINTER_TO_INT (count_p) : 0;
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if (count == 0)
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return;
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if (count == 1)
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g_hash_table_remove (manager->priv->groups, root);
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else
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g_hash_table_insert (manager->priv->groups, root, GINT_TO_POINTER(--count));
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2010-10-05 14:09:40 +00:00
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}
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2011-02-08 19:53:43 +00:00
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/**
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* st_focus_manager_get_group:
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* @manager: the #StFocusManager
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* @widget: an #StWidget
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*
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* Checks if @widget is inside a focus group, and if so, returns
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* the root of that group.
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*
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* Return value: (transfer none): the focus group root, or %NULL if
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* @widget is not in a focus group
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*/
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StWidget *
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st_focus_manager_get_group (StFocusManager *manager,
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StWidget *widget)
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{
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ClutterActor *actor = CLUTTER_ACTOR (widget);
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while (actor && !g_hash_table_lookup (manager->priv->groups, actor))
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actor = clutter_actor_get_parent (actor);
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return ST_WIDGET (actor);
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}
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2013-05-04 01:31:51 +00:00
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/**
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* st_focus_manager_navigate_from_event:
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* @manager: the #StFocusManager
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* @event: a #ClutterEvent
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*
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* Try to navigate from @event as if it bubbled all the way up to
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* the stage. This is useful in complex event handling situations
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* where you want key navigation, but a parent might be stopping
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* the key navigation event from bubbling all the way up to the stage.
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*
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* Returns: Whether a new actor was navigated to
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*/
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gboolean
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st_focus_manager_navigate_from_event (StFocusManager *manager,
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ClutterEvent *event)
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{
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2014-03-15 14:36:36 +00:00
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ClutterActor *stage;
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2013-05-04 01:31:51 +00:00
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if (event->type != CLUTTER_KEY_PRESS)
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return FALSE;
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2014-03-15 14:36:36 +00:00
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stage = CLUTTER_ACTOR (event->key.stage);
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2013-05-04 01:31:51 +00:00
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return st_focus_manager_stage_event (stage, event, manager);
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}
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