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An input only grab is a ClutterGrab on the stage that doesn't have an explicit actor associated with it. This is useful for cases where event should be captured as if focus was stolen to some mysterious place that doesn't have anything in the scene graph that represents it. Internally, it's implemented using a 0x0 sized actor attached directly to the stage, and a clutter action that consumes the events. An input-only grab takes a handler, user data and a destroy function for the user data. These are handed to the ClutterAction, which handles the actual event handling. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2628>
39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2022 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CLUTTER_INPUT_ONLY_ACTION_H
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#define CLUTTER_INPUT_ONLY_ACTION_H
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#include "clutter/clutter.h"
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typedef gboolean (* ClutterInputOnlyHandleEvent) (const ClutterEvent *event,
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gpointer user_data);
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#define CLUTTER_TYPE_INPUT_ONLY_ACTION (clutter_input_only_action_get_type ())
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G_DECLARE_FINAL_TYPE (ClutterInputOnlyAction, clutter_input_only_action,
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CLUTTER, INPUT_ONLY_ACTION, ClutterAction)
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ClutterInputOnlyAction * clutter_input_only_action_new (ClutterInputOnlyHandleEvent handle_event,
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gpointer user_data,
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GDestroyNotify destroy);
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#endif /* CLUTTER_INPUT_ONLY_ACTION_H */
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