DOKK / manpages / debian 10 / libqwt5-doc / QwtMagnifier.3.en
QwtMagnifier(3) Qwt User's Guide QwtMagnifier(3)

QwtMagnifier -

#include <qwt_magnifier.h>

Inherited by QwtPlotMagnifier.


QwtMagnifier (QWidget *)
virtual ~QwtMagnifier ()
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
QWidget * parentWidget ()
const QWidget * parentWidget () const
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 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 *)

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

Parameters:

parent Widget to be magnified

Event filter. When isEnabled() the mouse events of the observed widget are filtered.

See also:

widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent() widgetKeyReleaseEvent()

See also:

setMouseButton()

See also:

setZoomInKey()

See also:

setZoomOutKey()

Returns:

true when enabled, false otherwise

See also:

setEnabled(), eventFilter()

Returns:

Key factor

See also:

setKeyFactor()

Returns:

Mouse factor

See also:

setMouseFactor()

Returns:

Parent widget, where the rescaling happens

Returns:

Parent widget, where the rescaling happens

Rescale the parent widget

Parameters:

factor Scale factor

Implemented in QwtPlotMagnifier.

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()

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()

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()

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()

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()

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()

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()

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()

Returns:

Wheel button state

See also:

setWheelButtonState()

Returns:

Wheel factor

See also:

setWheelFactor()

Handle a key press event for the observed widget.

Parameters:

ke Key event

See also:

eventFilter(), widgetKeyReleaseEvent()

Handle a key release event for the observed widget.

Parameters:

ke Key event

See also:

eventFilter(), widgetKeyReleaseEvent()

Handle a mouse move event for the observed widget.

Parameters:

me Mouse event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(),

Handle a mouse press event for the observed widget.

Parameters:

me Mouse event

See also:

eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent()

Handle a mouse release event for the observed widget.

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),

Handle a wheel event for the observed widget.

Parameters:

we Wheel event

See also:

eventFilter()

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

Tue Nov 20 2012 Version 5.2.3