IconAnimation.h

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#ifndef OSMSCOUT_CLIENT_QT_ICONANIMATION_H
#define OSMSCOUT_CLIENT_QT_ICONANIMATION_H
 
/*
  OSMScout - a Qt backend for libosmscout and libosmscout-map
  Copyright (C) 2022  Lukáš Karas
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
 
  This library 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
  Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
 */
 
#include <osmscoutclientqt/ClientQtImportExport.h>
 
#include <osmscout/projection/Projection.h>
 
#include <osmscoutclientqt/IconLookup.h>
 
#include <QObject>
#include <QTimer>
#include <QPainter>
#include <QElapsedTimer>
 
namespace osmscout {
 
class OSMSCOUT_CLIENT_QT_API IconAnimation : public QObject
{
  Q_OBJECT
private:
  static constexpr int animationDuration = 200;
  QTimer timer;
 
  enum class State {
    FadeIn,
    Full,
    FadeOut
  };
 
  struct Animation {
    MapIcon icon;
    double size;
    double startSize;
    State state;
    QElapsedTimer duration;
 
    double MaxSize() const
    {
      return icon.image.width();
    }
 
    double MinSize() const
    {
      return icon.dimensions.width();
    }
  };
 
  std::vector<Animation> icons;
 
public slots:
  void tick();
 
signals:
  void update();
 
public:
  IconAnimation();
  ~IconAnimation() override = default;
 
  void activate(const MapIcon &icon);
  void deactivateAll();
  void paint(QPainter *painter, const MercatorProjection &projection);
};
 
}
 
#endif // OSMSCOUT_CLIENT_QT_ICONANIMATION_H