PlotPanner.h

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/******************************************************************************
 * Copyright (C) 2015 by Ralf Kaestner                                        *
 * ralf.kaestner@gmail.com                                                    *
 *                                                                            *
 * This program is free software; you can redistribute it and/or modify       *
 * it under the terms of the Lesser GNU General Public License as published by*
 * the Free Software Foundation; either version 3 of the License, or          *
 * (at your option) any later version.                                        *
 *                                                                            *
 * This program 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               *
 * Lesser GNU General Public License for more details.                        *
 *                                                                            *
 * You should have received a copy of the Lesser GNU General Public License   *
 * along with this program. If not, see <http://www.gnu.org/licenses/>.       *
 ******************************************************************************/

#ifndef RQT_MULTIPLOT_PLOT_PANNER_H
#define RQT_MULTIPLOT_PLOT_PANNER_H

#include <QCursor>
#include <QObject>
#include <QPointF>

#include <qwt/qwt_scale_map.h>

#include <rqt_multiplot/BoundingRectangle.h>

class QwtPlotCanvas;

namespace rqt_multiplot {
  class PlotPanner :
    public QObject {
  Q_OBJECT
  public:
    PlotPanner(QwtPlotCanvas* canvas);
    ~PlotPanner();

  protected:
    bool eventFilter(QObject* object, QEvent* event);

  private:
    QwtPlotCanvas* canvas_;

    bool panning_;

    QPoint position_;
    QCursor cursor_;
    QCursor canvasCursor_;

    QwtScaleMap xMap_;
    QwtScaleMap yMap_;
    BoundingRectangle bounds_;
  };
};

#endif