1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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2 | * QwtPolar Widget Library
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3 | * Copyright (C) 2008 Uwe Rathmann
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4 | *
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5 | * This library is free software; you can redistribute it and/or
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6 | * modify it under the terms of the Qwt License, Version 1.0
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7 | *****************************************************************************/
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8 |
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9 | #ifndef QWT_POLAR_MAGNIFIER_H
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10 | #define QWT_POLAR_MAGNIFIER_H 1
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11 |
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12 | #include "qwt_polar_global.h"
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13 | #include "qwt_magnifier.h"
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14 |
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15 | class QwtPolarPlot;
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16 | class QwtPolarCanvas;
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17 |
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18 | /*!
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19 | \brief QwtPolarMagnifier provides zooming, by magnifying in steps.
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20 |
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21 | Using QwtPlotMagnifier a plot can be zoomed in/out in steps using
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22 | keys, the mouse wheel or moving a mouse button in vertical direction.
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23 |
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24 | Together with QwtPolarPanner it is possible to implement
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25 | an individual navigation of the plot canvas.
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26 |
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27 | \sa QwtPolarPanner, QwtPolarPlot, QwtPolarCanvas
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28 | */
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29 |
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30 | class QWT_POLAR_EXPORT QwtPolarMagnifier: public QwtMagnifier
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31 | {
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32 | Q_OBJECT
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33 |
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34 | public:
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35 | explicit QwtPolarMagnifier( QwtPolarCanvas * );
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36 | virtual ~QwtPolarMagnifier();
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37 |
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38 | void setUnzoomKey( int key, int modifiers );
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39 | void getUnzoomKey( int &key, int &modifiers ) const;
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40 |
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41 | QwtPolarPlot *plot();
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42 | const QwtPolarPlot *plot() const;
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43 |
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44 | QwtPolarCanvas *canvas();
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45 | const QwtPolarCanvas *canvas() const;
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46 |
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47 | protected:
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48 | virtual void rescale( double factor );
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49 | void unzoom();
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50 |
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51 | virtual void widgetKeyPressEvent( QKeyEvent * );
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52 |
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53 | private:
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54 | class PrivateData;
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55 | PrivateData *d_data;
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56 | };
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57 |
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58 | #endif
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