Copyright (C) 2012, University of Cambridge, Department of Psychiatry.
Created by 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 <https://www.gnu.org/licenses/>.
// An extension of QGraphicsPixmapItem that implement opacity.
class GraphicsPixmapItemWithOpacity : public QGraphicsPixmapItem
// Don't use the Q_OBJECT macro! QGraphicsItem is not a QObject.
// If you do, you'll get:
// error: ‘staticMetaObject’ is not a member of ‘QGraphicsPixmapItem’
GraphicsPixmapItemWithOpacity(QGraphicsItem* parent = nullptr);
GraphicsPixmapItemWithOpacity(const QPixmap& pixmap,
QGraphicsItem* parent = nullptr);
void setOpacity(qreal opacity);
virtual void paint(QPainter* painter,
const QStyleOptionGraphicsItem* option,
QWidget* widget) override;