| 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_PICKER_H
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| 10 | #define QWT_POLAR_PICKER_H
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| 11 |
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| 12 | #include "qwt_polar_global.h"
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| 13 | #include "qwt_picker.h"
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| 14 | #include <qvector.h>
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| 15 | #include <qpainterpath.h>
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| 16 |
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| 17 | class QwtPolarPlot;
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| 18 | class QwtPolarCanvas;
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| 19 | class QwtPointPolar;
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| 20 |
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| 21 | /*!
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| 22 | \brief QwtPolarPicker provides selections on a plot canvas
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| 23 |
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| 24 | QwtPolarPicker is a QwtPicker tailored for selections on
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| 25 | a polar plot canvas.
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| 26 | */
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| 27 |
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| 28 | class QWT_POLAR_EXPORT QwtPolarPicker: public QwtPicker
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| 29 | {
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| 30 | Q_OBJECT
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| 31 |
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| 32 | public:
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| 33 | explicit QwtPolarPicker( QwtPolarCanvas * );
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| 34 | virtual ~QwtPolarPicker();
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| 35 |
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| 36 | explicit QwtPolarPicker(
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| 37 | RubberBand rubberBand, DisplayMode trackerMode,
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| 38 | QwtPolarCanvas * );
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| 39 |
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| 40 | QwtPolarPlot *plot();
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| 41 | const QwtPolarPlot *plot() const;
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| 42 |
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| 43 | QwtPolarCanvas *canvas();
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| 44 | const QwtPolarCanvas *canvas() const;
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| 45 |
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| 46 | virtual QRect pickRect() const;
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| 47 |
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| 48 | Q_SIGNALS:
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| 49 |
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| 50 | /*!
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| 51 | A signal emitted in case of selectionFlags() & PointSelection.
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| 52 | \param pos Selected point
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| 53 | */
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| 54 | void selected( const QwtPointPolar &pos );
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| 55 |
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| 56 | /*!
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| 57 | A signal emitting the selected points,
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| 58 | at the end of a selection.
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| 59 |
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| 60 | \param points Selected points
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| 61 | */
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| 62 | void selected( const QVector<QwtPointPolar> &points );
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| 63 |
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| 64 | /*!
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| 65 | A signal emitted when a point has been appended to the selection
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| 66 |
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| 67 | \param pos Position of the appended point.
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| 68 | \sa append(). moved()
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| 69 | */
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| 70 | void appended( const QwtPointPolar &pos );
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| 71 |
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| 72 | /*!
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| 73 | A signal emitted whenever the last appended point of the
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| 74 | selection has been moved.
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| 75 |
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| 76 | \param pos Position of the moved last point of the selection.
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| 77 | \sa move(), appended()
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| 78 | */
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| 79 | void moved( const QwtPointPolar &pos );
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| 80 |
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| 81 | protected:
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| 82 | QwtPointPolar invTransform( const QPoint & ) const;
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| 83 |
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| 84 | virtual QwtText trackerText( const QPoint & ) const;
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| 85 | virtual QwtText trackerTextPolar( const QwtPointPolar & ) const;
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| 86 |
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| 87 | virtual void move( const QPoint & );
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| 88 | virtual void append( const QPoint & );
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| 89 | virtual bool end( bool ok = true );
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| 90 |
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| 91 | private:
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| 92 | virtual QPainterPath pickArea() const;
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| 93 |
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| 94 | class PrivateData;
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| 95 | PrivateData *d_data;
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| 96 | };
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| 97 |
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| 98 | #endif
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