1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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2 | * Qwt Widget Library
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3 | * Copyright (C) 1997 Josef Wilgen
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4 | * Copyright (C) 2002 Uwe Rathmann
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5 | *
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6 | * This library is free software; you can redistribute it and/or
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7 | * modify it under the terms of the Qwt License, Version 1.0
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8 | *****************************************************************************/
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9 |
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10 | #ifndef QWT_WHEEL_H
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11 | #define QWT_WHEEL_H
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12 |
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13 | #include "qwt_global.h"
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14 | #include "qwt_abstract_slider.h"
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15 |
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16 | /*!
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17 | \brief The Wheel Widget
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18 |
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19 | The wheel widget can be used to change values over a very large range
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20 | in very small steps. Using the setMass member, it can be configured
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21 | as a flywheel.
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22 |
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23 | \sa The radio example.
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24 | */
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25 | class QWT_EXPORT QwtWheel : public QwtAbstractSlider
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26 | {
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27 | Q_OBJECT
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28 | Q_PROPERTY( double totalAngle READ totalAngle WRITE setTotalAngle )
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29 | Q_PROPERTY( double viewAngle READ viewAngle WRITE setViewAngle )
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30 | Q_PROPERTY( int tickCnt READ tickCnt WRITE setTickCnt )
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31 | Q_PROPERTY( int internalBorder READ internalBorder WRITE setInternalBorder )
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32 | Q_PROPERTY( double mass READ mass WRITE setMass )
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33 |
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34 | public:
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35 | explicit QwtWheel(QWidget *parent = NULL);
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36 | #if QT_VERSION < 0x040000
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37 | explicit QwtWheel(QWidget *parent, const char *name);
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38 | #endif
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39 | virtual ~QwtWheel();
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40 |
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41 | virtual void setOrientation(Qt::Orientation);
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42 |
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43 | double totalAngle() const;
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44 | double viewAngle() const;
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45 | int tickCnt() const;
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46 | int internalBorder() const;
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47 |
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48 | double mass() const;
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49 |
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50 | void setTotalAngle (double angle);
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51 | void setTickCnt(int cnt);
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52 | void setViewAngle(double angle);
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53 | void setInternalBorder(int width);
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54 | void setMass(double val);
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55 | void setWheelWidth( int w );
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56 |
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57 | virtual QSize sizeHint() const;
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58 | virtual QSize minimumSizeHint() const;
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59 |
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60 | protected:
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61 | virtual void resizeEvent(QResizeEvent *e);
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62 | virtual void paintEvent(QPaintEvent *e);
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63 |
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64 | void layoutWheel( bool update = true );
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65 | void draw(QPainter *, const QRect &);
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66 | void drawWheel(QPainter *, const QRect &);
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67 | void drawWheelBackground(QPainter *, const QRect &);
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68 | void setColorArray();
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69 |
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70 | virtual void valueChange();
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71 | virtual void paletteChange( const QPalette &);
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72 |
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73 | virtual double getValue(const QPoint &);
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74 | virtual void getScrollMode(const QPoint &,
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75 | int &scrollMode, int &direction);
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76 |
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77 | private:
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78 | void initWheel();
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79 |
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80 | class PrivateData;
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81 | PrivateData *d_data;
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82 | };
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83 |
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84 | #endif
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