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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)