qwtmagnifier(3)
NAME
QwtMagnifier - QwtMagnifier provides zooming, by magnifying in steps.
SYNOPSIS
#include <qwt_magnifier.h> Inherited by QwtPlotMagnifier. Public Member Functions QwtMagnifier (QWidget *) virtual ~QwtMagnifier () QWidget * parentWidget () const QWidget * parentWidget () const void setEnabled (bool) bool isEnabled () const void setMouseFactor (double) double mouseFactor () const void setMouseButton (int button, int buttonState=Qt::NoButton) void getMouseButton (int &button, int &buttonState) const void setWheelFactor (double) double wheelFactor () const void setWheelButtonState (int buttonState) int wheelButtonState () const void setKeyFactor (double) double keyFactor () const void setZoomInKey (int key, int modifiers) void getZoomInKey (int &key, int &modifiers) const void setZoomOutKey (int key, int modifiers) void getZoomOutKey (int &key, int &modifiers) const virtual bool eventFilter (QObject *, QEvent *) Protected Member Functions virtual void rescale (double factor)=0 virtual void widgetMousePressEvent (QMouseEvent *) virtual void widgetMouseReleaseEvent (QMouseEvent *) virtual void widgetMouseMoveEvent (QMouseEvent *) virtual void widgetWheelEvent (QWheelEvent *) virtual void widgetKeyPressEvent (QKeyEvent *) virtual void widgetKeyReleaseEvent (QKeyEvent *)
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()
- const QWidget * QwtMagnifier::parentWidget () const
- Returns:
Parent widget, where the rescaling happens
- QWidget * QwtMagnifier::parentWidget ()
- Returns:
Parent widget, where the rescaling happens
- virtual void QwtMagnifier::rescale (double factor) [protected, pure
- virtual]
Rescale the parent widget - Parameters:
factor Scale factor
- Implemented in QwtPlotMagnifier.
- void QwtMagnifier::setEnabled (bool on)
- 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 (double factor)
- 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 (int button, int buttonState =
- 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 (double factor)
- 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 (int buttonState)
- 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 (double factor)
- 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 (int key, int modifiers)
- 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 (int key, int modifiers)
- 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.