| 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_MAGNIFIER_H
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| 11 | #define QWT_MAGNIFIER_H 1
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| 12 |
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| 13 | #include "qwt_global.h"
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| 14 | #include <qobject.h>
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| 15 |
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| 16 | class QWidget;
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| 17 | class QMouseEvent;
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| 18 | class QWheelEvent;
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| 19 | class QKeyEvent;
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| 20 |
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| 21 | /*!
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| 22 | \brief QwtMagnifier provides zooming, by magnifying in steps.
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| 23 |
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| 24 | Using QwtMagnifier a plot can be zoomed in/out in steps using
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| 25 | keys, the mouse wheel or moving a mouse button in vertical direction.
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| 26 | */
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| 27 | class QWT_EXPORT QwtMagnifier: public QObject
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| 28 | {
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| 29 | Q_OBJECT
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| 30 |
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| 31 | public:
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| 32 | explicit QwtMagnifier( QWidget * );
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| 33 | virtual ~QwtMagnifier();
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| 34 |
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| 35 | QWidget *parentWidget();
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| 36 | const QWidget *parentWidget() const;
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| 37 |
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| 38 | void setEnabled( bool );
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| 39 | bool isEnabled() const;
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| 40 |
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| 41 | // mouse
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| 42 | void setMouseFactor( double );
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| 43 | double mouseFactor() const;
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| 44 |
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| 45 | void setMouseButton( int button, int buttonState = Qt::NoButton );
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| 46 | void getMouseButton( int &button, int &buttonState ) const;
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| 47 |
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| 48 | // mouse wheel
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| 49 | void setWheelFactor( double );
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| 50 | double wheelFactor() const;
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| 51 |
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| 52 | void setWheelButtonState( int buttonState );
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| 53 | int wheelButtonState() const;
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| 54 |
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| 55 | // keyboard
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| 56 | void setKeyFactor( double );
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| 57 | double keyFactor() const;
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| 58 |
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| 59 | void setZoomInKey( int key, int modifiers );
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| 60 | void getZoomInKey( int &key, int &modifiers ) const;
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| 61 |
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| 62 | void setZoomOutKey( int key, int modifiers );
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| 63 | void getZoomOutKey( int &key, int &modifiers ) const;
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| 64 |
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| 65 | virtual bool eventFilter( QObject *, QEvent * );
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| 66 |
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| 67 | protected:
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| 68 | /*!
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| 69 | Rescale the parent widget
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| 70 | \param factor Scale factor
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| 71 | */
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| 72 | virtual void rescale( double factor ) = 0;
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| 73 |
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| 74 | virtual void widgetMousePressEvent( QMouseEvent * );
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| 75 | virtual void widgetMouseReleaseEvent( QMouseEvent * );
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| 76 | virtual void widgetMouseMoveEvent( QMouseEvent * );
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| 77 | virtual void widgetWheelEvent( QWheelEvent * );
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| 78 | virtual void widgetKeyPressEvent( QKeyEvent * );
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| 79 | virtual void widgetKeyReleaseEvent( QKeyEvent * );
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| 80 |
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| 81 | private:
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| 82 | class PrivateData;
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| 83 | PrivateData *d_data;
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| 84 | };
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| 85 |
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| 86 | #endif
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