QwtMagnifier(3) 						 Qwt User's Guide						   QwtMagnifier(3)

NAME

       QwtMagnifier -

       QwtMagnifier provides zooming, by magnifying in steps.

SYNOPSIS

       #include <qwt_magnifier.h>

       Inherited by QwtPlotMagnifier.

   Public Member Functions
       virtual bool eventFilter (QObject *, QEvent *)
       void getMouseButton (int &button, int &buttonState) const
       void getZoomInKey (int &key, int &modifiers) const
       void getZoomOutKey (int &key, int &modifiers) const
       bool isEnabled () const
       double keyFactor () const
       double mouseFactor () const
       const QWidget * parentWidget () const
       QWidget * parentWidget ()
       QwtMagnifier (QWidget *)
       void setEnabled (bool)
       void setKeyFactor (double)
       void setMouseButton (int button, int buttonState=Qt::NoButton)
       void setMouseFactor (double)
       void setWheelButtonState (int buttonState)
       void setWheelFactor (double)
       void setZoomInKey (int key, int modifiers)
       void setZoomOutKey (int key, int modifiers)
       int wheelButtonState () const
       double wheelFactor () const
       virtual ~QwtMagnifier ()

   Protected Member Functions
       virtual void rescale (double factor)=0
       virtual void widgetKeyPressEvent (QKeyEvent *)
       virtual void widgetKeyReleaseEvent (QKeyEvent *)
       virtual void widgetMouseMoveEvent (QMouseEvent *)
       virtual void widgetMousePressEvent (QMouseEvent *)
       virtual void widgetMouseReleaseEvent (QMouseEvent *)
       virtual void widgetWheelEvent (QWheelEvent *)

Detailed Description
       QwtMagnifier provides zooming, by magnifying in steps.

       Using QwtMagnifier a plot can be zoomed in/out in steps using keys, the mouse wheel or moving a mouse button in vertical direction.

Constructor &; Destructor Documentation
   QwtMagnifier::QwtMagnifier (QWidget *parent) [explicit] Constructor
       Parameters:
	   parent Widget to be magnified

   QwtMagnifier::~QwtMagnifier () [virtual]
       Destructor.

Member Function Documentation
   bool QwtMagnifier::eventFilter (QObject *o, QEvent *e) [virtual]
       Event filter. When isEnabled() the mouse events of the observed widget are filtered.

       See also:
	   widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent()
	   widgetKeyReleaseEvent()

   void QwtMagnifier::getMouseButton (int &button, int &buttonState) const See also:
	   setMouseButton()

   void QwtMagnifier::getZoomInKey (int &key, int &modifiers) const See also:
	   setZoomInKey()

   void QwtMagnifier::getZoomOutKey (int &key, int &modifiers) const See also:
	   setZoomOutKey()

   bool QwtMagnifier::isEnabled () const Returns:
	   true when enabled, false otherwise

       See also:
	   setEnabled(), eventFilter()

   double QwtMagnifier::keyFactor () const Returns:
	   Key factor

       See also:
	   setKeyFactor()

   double QwtMagnifier::mouseFactor () const Returns:
	   Mouse factor

       See also:
	   setMouseFactor()

   QWidget * QwtMagnifier::parentWidget () Returns:
	   Parent widget, where the rescaling happens

   const QWidget * QwtMagnifier::parentWidget () const Returns:
	   Parent widget, where the rescaling happens

   virtual void QwtMagnifier::rescale (doublefactor) [protected, pure virtual] Rescale the parent widget
       Parameters:
	   factor Scale factor

       Implemented in QwtPlotMagnifier.

   void QwtMagnifier::setEnabled (boolon)
       En/disable the magnifier. When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed.

       Parameters:
	   on true or false

       See also:
	   isEnabled(), eventFilter()

   void QwtMagnifier::setKeyFactor (doublefactor)
       Change the key factor. The key factor defines the ratio between the current range on the parent widget and the zoomed range for each key
       press of the zoom in/out keys. The default value is 0.9.

       Parameters:
	   factor Key factor

       See also:
	   keyFactor(), setZoomInKey(), setZoomOutKey(), setWheelFactor, setMouseFactor()

   void QwtMagnifier::setMouseButton (intbutton, intbuttonState = Qt::NoButton) Assign the mouse button, that is used for zooming in/out. The
       default value is Qt::RightButton.
       Parameters:
	   button Button
	   buttonState Button state

       See also:
	   getMouseButton()

   void QwtMagnifier::setMouseFactor (doublefactor)
       Change the mouse factor. The mouse factor defines the ratio between the current range on the parent widget and the zoomed range for each
       vertical mouse movement. The default value is 0.95.

       Parameters:
	   factor Wheel factor

       See also:
	   mouseFactor(), setMouseButton(), setWheelFactor(), setKeyFactor()

   void QwtMagnifier::setWheelButtonState (intbuttonState) Assign a mandatory button state for zooming in/out using the wheel. The default button
       state is Qt::NoButton.
       Parameters:
	   buttonState Button state

       See also:
	   wheelButtonState()

   void QwtMagnifier::setWheelFactor (doublefactor)
       Change the wheel factor. The wheel factor defines the ratio between the current range on the parent widget and the zoomed range for each
       step of the wheel. The default value is 0.9.

       Parameters:
	   factor Wheel factor

       See also:
	   wheelFactor(), setWheelButtonState(), setMouseFactor(), setKeyFactor()

   void QwtMagnifier::setZoomInKey (intkey, intmodifiers) Assign the key, that is used for zooming in. The default combination is Qt::Key_Plus +
       Qt::NoModifier.
       Parameters:
	   key
	   modifiers

       See also:
	   getZoomInKey(), setZoomOutKey()

   void QwtMagnifier::setZoomOutKey (intkey, intmodifiers) Assign the key, that is used for zooming out. The default combination is Qt::Key_Minus
       + Qt::NoModifier.
       Parameters:
	   key
	   modifiers

       See also:
	   getZoomOutKey(), setZoomOutKey()

   int QwtMagnifier::wheelButtonState () const Returns:
	   Wheel button state

       See also:
	   setWheelButtonState()

   double QwtMagnifier::wheelFactor () const Returns:
	   Wheel factor

       See also:
	   setWheelFactor()

   void QwtMagnifier::widgetKeyPressEvent (QKeyEvent *ke) [protected, virtual] Handle a key press event for the observed widget.
       Parameters:
	   ke Key event

       See also:
	   eventFilter(), widgetKeyReleaseEvent()

   void QwtMagnifier::widgetKeyReleaseEvent (QKeyEvent *) [protected, virtual] Handle a key release event for the observed widget.
       Parameters:
	   ke Key event

       See also:
	   eventFilter(), widgetKeyReleaseEvent()

   void QwtMagnifier::widgetMouseMoveEvent (QMouseEvent *me) [protected, virtual] Handle a mouse move event for the observed widget.
       Parameters:
	   me Mouse event

       See also:
	   eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),

   void QwtMagnifier::widgetMousePressEvent (QMouseEvent *me) [protected, virtual] Handle a mouse press event for the observed widget.
       Parameters:
	   me Mouse event

       See also:
	   eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent()

   void QwtMagnifier::widgetMouseReleaseEvent (QMouseEvent *) [protected, virtual] Handle a mouse release event for the observed widget.
       See also:
	   eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),

   void QwtMagnifier::widgetWheelEvent (QWheelEvent *we) [protected, virtual] Handle a wheel event for the observed widget.
       Parameters:
	   we Wheel event

       See also:
	   eventFilter()

Author
       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 5.2.2							  Mon Aug 1 2011						   QwtMagnifier(3)