Copyright (C) 2012-2020 Rudolf Cardinal (email@example.com).
This file is part of CamCOPS.
CamCOPS is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
CamCOPS 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with CamCOPS. If not, see <http://www.gnu.org/licenses/>.
class KeyPressWatcher : public QObject
// Object to watch for keypresses on another widget.
// If you ARE a QWidget, you can overload its event functions instead.
// If you OWN a QWidget, you can use this.
// The watcher is OWNED BY and WATCHES the same thing.
using CallbackFunction = std::function<void()>;
// Constructor, taking the object to watch.
explicit KeyPressWatcher(QDialog* parent);
// Receive incoming events.
virtual bool eventFilter(QObject* obj, QEvent* event) override;
// "Please call my callback function when the widget receives this
void addKeyEvent(int key, const CallbackFunction& callback);
// "The watched widget has received a keypress."
void keypress(int key);
QMap<int, CallbackFunction> m_map;