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 FocusWatcher : public QObject
// Object to watch for change of focus on another widget.
// - If you ARE a widget, you can overload QWidget::focusOutEvent().
// - If you OWN a widget, use this. (You can't connect to the widget's
// QWidget::focusOutEvent(), because that's protected.)
// The watcher is OWNED BY and WATCHES the same thing.
// Constructor, taking the object to watch.
explicit FocusWatcher(QObject* parent);
// Receive incoming events.
virtual bool eventFilter(QObject* obj, QEvent* event) override;
// "The watched widget's focus has changed."
void focusChanged(bool in);