[89] | 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_ABSTRACT_SLIDER_H
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| 11 | #define QWT_ABSTRACT_SLIDER_H
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| 12 |
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| 13 | #include <qwidget.h>
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| 14 | #include "qwt_global.h"
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| 15 | #include "qwt_double_range.h"
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| 16 |
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| 17 | /*!
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| 18 | \brief An abstract base class for slider widgets
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| 19 |
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| 20 | QwtAbstractSlider is a base class for
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| 21 | slider widgets. It handles mouse events
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| 22 | and updates the slider's value accordingly. Derived classes
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| 23 | only have to implement the getValue() and
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| 24 | getScrollMode() members, and should react to a
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| 25 | valueChange(), which normally requires repainting.
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| 26 | */
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| 27 |
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| 28 | class QWT_EXPORT QwtAbstractSlider : public QWidget, public QwtDoubleRange
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| 29 | {
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| 30 | Q_OBJECT
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| 31 | Q_PROPERTY( bool readOnly READ isReadOnly WRITE setReadOnly )
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| 32 | Q_PROPERTY( bool valid READ isValid WRITE setValid )
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| 33 | Q_PROPERTY( double mass READ mass WRITE setMass )
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| 34 | #ifndef Q_MOC_RUN // Qt3 moc
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| 35 | #define QWT_PROPERTY Q_PROPERTY
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| 36 | Q_PROPERTY( Orientation orientation
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| 37 | READ orientation WRITE setOrientation )
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| 38 | #else // Qt4 moc
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| 39 | // MOC_SKIP_BEGIN
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| 40 | Q_PROPERTY( Qt::Orientation orientation
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| 41 | READ orientation WRITE setOrientation )
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| 42 | // MOC_SKIP_END
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| 43 | #endif
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| 44 |
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| 45 | public:
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| 46 | /*!
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| 47 | Scroll mode
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| 48 | \sa getScrollMode()
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| 49 | */
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| 50 | enum ScrollMode
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| 51 | {
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| 52 | ScrNone,
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| 53 | ScrMouse,
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| 54 | ScrTimer,
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| 55 | ScrDirect,
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| 56 | ScrPage
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| 57 | };
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| 58 |
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| 59 | explicit QwtAbstractSlider(Qt::Orientation, QWidget *parent = NULL);
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| 60 | virtual ~QwtAbstractSlider();
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| 61 |
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| 62 | void setUpdateTime(int t);
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| 63 | void stopMoving();
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| 64 | void setTracking(bool enable);
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| 65 |
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| 66 | virtual void setMass(double val);
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| 67 | virtual double mass() const;
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| 68 |
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| 69 | #if QT_VERSION >= 0x040000
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| 70 | virtual void setOrientation(Qt::Orientation o);
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| 71 | Qt::Orientation orientation() const;
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| 72 | #else
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| 73 | virtual void setOrientation(Orientation o);
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| 74 | Orientation orientation() const;
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| 75 | #endif
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| 76 |
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| 77 | bool isReadOnly() const;
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| 78 |
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| 79 | /*
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| 80 | Wrappers for QwtDblRange::isValid/QwtDblRange::setValid made
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| 81 | to be available as Q_PROPERTY in the designer.
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| 82 | */
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| 83 |
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| 84 | /*!
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| 85 | \sa QwtDblRange::isValid()
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| 86 | */
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| 87 | bool isValid() const { return QwtDoubleRange::isValid(); }
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| 88 |
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| 89 | /*!
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| 90 | \param valid true/false
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| 91 | \sa QwtDblRange::isValid()
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| 92 | */
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| 93 | void setValid(bool valid) { QwtDoubleRange::setValid(valid); }
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| 94 |
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| 95 | public slots:
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| 96 | virtual void setValue(double val);
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| 97 | virtual void fitValue(double val);
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| 98 | virtual void incValue(int steps);
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| 99 |
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| 100 | virtual void setReadOnly(bool);
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| 101 |
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| 102 | signals:
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| 103 |
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| 104 | /*!
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| 105 | \brief Notify a change of value.
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| 106 |
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| 107 | In the default setting
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| 108 | (tracking enabled), this signal will be emitted every
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| 109 | time the value changes ( see setTracking() ).
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| 110 | \param value new value
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| 111 | */
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| 112 | void valueChanged(double value);
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| 113 |
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| 114 | /*!
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| 115 | This signal is emitted when the user presses the
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| 116 | movable part of the slider (start ScrMouse Mode).
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| 117 | */
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| 118 | void sliderPressed();
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| 119 |
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| 120 | /*!
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| 121 | This signal is emitted when the user releases the
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| 122 | movable part of the slider.
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| 123 | */
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| 124 |
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| 125 | void sliderReleased();
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| 126 | /*!
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| 127 | This signal is emitted when the user moves the
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| 128 | slider with the mouse.
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| 129 | \param value new value
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| 130 | */
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| 131 | void sliderMoved(double value);
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| 132 |
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| 133 | protected:
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| 134 | virtual void setPosition(const QPoint &);
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| 135 | virtual void valueChange();
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| 136 |
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| 137 | virtual void timerEvent(QTimerEvent *e);
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| 138 | virtual void mousePressEvent(QMouseEvent *e);
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| 139 | virtual void mouseReleaseEvent(QMouseEvent *e);
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| 140 | virtual void mouseMoveEvent(QMouseEvent *e);
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| 141 | virtual void keyPressEvent(QKeyEvent *e);
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| 142 | virtual void wheelEvent(QWheelEvent *e);
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| 143 |
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| 144 | /*!
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| 145 | \brief Determine the value corresponding to a specified poind
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| 146 |
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| 147 | This is an abstract virtual function which is called when
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| 148 | the user presses or releases a mouse button or moves the
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| 149 | mouse. It has to be implemented by the derived class.
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| 150 | \param p point
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| 151 | */
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| 152 | virtual double getValue(const QPoint & p) = 0;
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| 153 | /*!
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| 154 | \brief Determine what to do when the user presses a mouse button.
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| 155 |
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| 156 | This function is abstract and has to be implemented by derived classes.
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| 157 | It is called on a mousePress event. The derived class can determine
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| 158 | what should happen next in dependence of the position where the mouse
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| 159 | was pressed by returning scrolling mode and direction. QwtAbstractSlider
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| 160 | knows the following modes:<dl>
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| 161 | <dt>QwtAbstractSlider::ScrNone
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| 162 | <dd>Scrolling switched off. Don't change the value.
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| 163 | <dt>QwtAbstractSlider::ScrMouse
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| 164 | <dd>Change the value while the user keeps the
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| 165 | button pressed and moves the mouse.
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| 166 | <dt>QwtAbstractSlider::ScrTimer
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| 167 | <dd>Automatic scrolling. Increment the value
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| 168 | in the specified direction as long as
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| 169 | the user keeps the button pressed.
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| 170 | <dt>QwtAbstractSlider::ScrPage
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| 171 | <dd>Automatic scrolling. Same as ScrTimer, but
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| 172 | increment by page size.</dl>
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| 173 |
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| 174 | \param p point where the mouse was pressed
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| 175 | \retval scrollMode The scrolling mode
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| 176 | \retval direction direction: 1, 0, or -1.
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| 177 | */
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| 178 | virtual void getScrollMode( const QPoint &p,
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| 179 | int &scrollMode, int &direction) = 0;
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| 180 |
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| 181 | void setMouseOffset(double);
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| 182 | double mouseOffset() const;
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| 183 |
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| 184 | int scrollMode() const;
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| 185 |
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| 186 | private:
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| 187 | void buttonReleased();
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| 188 |
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| 189 | class PrivateData;
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| 190 | PrivateData *d_data;
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| 191 | };
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| 192 |
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| 193 | #endif
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