File indexing completed on 2022-11-22 12:51:02

0001 /*
0002     PeriodicTableScene - Periodic Table Graphics Scene for Kalzium
0003 
0004     SPDX-FileCopyrightText: 2005-2006 Pino Toscano <toscano.pino@tiscali.it>
0005     SPDX-FileCopyrightText: 2003-2006 Carsten Niehaus <cniehaus@kde.org>
0006     SPDX-FileCopyrightText: 2007-2009 Marcus D. Hanwell <marcus@cryos.org>
0007     SPDX-FileCopyrightText: 2010 Etienne Rebetez <etienne.rebetez@oberwallis.ch>
0008 
0009     SPDX-License-Identifier: LGPL-2.1-or-later
0010 */
0011 
0012 #ifndef PERIODICTABLESCENE_H
0013 #define PERIODICTABLESCENE_H
0014 
0015 #include <QGraphicsScene>
0016 #include <QPointF>
0017 #include <QTimer>
0018 
0019 #include "elementitem.h"
0020 
0021 /**
0022  * @class PeriodicTableScene
0023  * @author Marcus D. Hanwell
0024  * @brief This class encapsulates the scene, all items are contained in it.
0025  *
0026  * This class implements a QGraphicsScene that holds all of the element items.
0027  * Any items owned by this class are automatically deleted by it.
0028  */
0029 class PeriodicTableScene : public QGraphicsScene
0030 {
0031     Q_OBJECT
0032 
0033 public:
0034     explicit PeriodicTableScene(QObject *parent = nullptr);
0035     ~PeriodicTableScene() override;
0036 
0037 Q_SIGNALS:
0038     /**
0039      * This signal is emitted when an element item is released.
0040      */
0041     void elementChanged(int element);
0042     /**
0043      * This signal is emitted when an element item is hovered.
0044      */
0045     void elementHovered(int element);
0046     /**
0047      * This signal is emitted when no element was clicked.
0048      */
0049     void freeSpaceClick();
0050 
0051 private Q_SLOTS:
0052     void slotMouseover();
0053 
0054 private:
0055     QTimer m_hoverTimer;
0056     int m_prevHoverElement;
0057     QPointF m_eventPos;
0058 
0059 protected:
0060     bool event(QEvent *e) override;
0061     void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
0062     void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
0063     void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
0064 };
0065 
0066 #endif // PERIODICTABLESCENE_H