TouchPlot.h

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/* @@@LICENSE
*
*      Copyright (c) 2011-2012 Hewlett-Packard Development Company, L.P.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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* LICENSE@@@ */




#ifndef TOUCHPLOT_H
#define TOUCHPLOT_H

#include <stdint.h>
#include "Common.h"

#include <QGraphicsObject>
#include <QTouchEvent>

class TouchPlot : public QGraphicsItem
{
public:

        TouchPlot();
        virtual ~TouchPlot();

        void setSize(uint32_t width, uint32_t height);
        void updateTouches(QTouchEvent* touchEvents);

        enum TouchPlotOption_t {
                TouchPlotOption_Collection,
                TouchPlotOption_Trails,
                TouchPlotOption_Crosshairs,
        };

        void enableTouchPlotOption(TouchPlotOption_t TouchPlotOption, bool enable);

        bool hasOptionsEnabled();

private:

        virtual QRectF boundingRect () const;
        virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem*, QWidget*);
        QBrush stateToBrush(Qt::TouchPointState state);

private:
        static const int m_max_touches = 10;
        uint32_t m_width, m_height;
        int m_plotRectSize;

        bool m_render_trails;
        bool m_render_crosshairs;
        bool m_collecting;

        QList<QTouchEvent::TouchPoint> m_touchPointHistory[m_max_touches];
        int m_touches_down;

};

#endif /* TOUCHPLOT_H */