QwtPlotMagnifier(3) Qwt User's Guide QwtPlotMagnifier(3)
NAME
QwtPlotMagnifier -
QwtPlotMagnifier provides zooming, by magnifying in steps.
SYNOPSIS
#include <qwt_plot_magnifier.h>
Inherits QwtMagnifier.
Public Member Functions
QwtPlotCanvas * canvas ()
const QwtPlotCanvas * canvas () const
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 isAxisEnabled (int axis) const
bool isEnabled () const
double keyFactor () const
double mouseFactor () const
QWidget * parentWidget ()
const QWidget * parentWidget () const
const QwtPlot * plot () const
QwtPlot * plot ()
QwtPlotMagnifier (QwtPlotCanvas *)
void setAxisEnabled (int axis, bool on)
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 ~QwtPlotMagnifier ()
Protected Member Functions
virtual void rescale (double factor)
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
QwtPlotMagnifier provides zooming, by magnifying in steps.
Using QwtPlotMagnifier a plot can be zoomed in/out in steps using keys, the mouse wheel or moving a mouse button in vertical direction.
Together with QwtPlotZoomer and QwtPlotPanner it is possible to implement individual and powerful navigation of the plot canvas.
See also:
QwtPlotZoomer, QwtPlotPanner, QwtPlot
Constructor &; Destructor Documentation
QwtPlotMagnifier::QwtPlotMagnifier (QwtPlotCanvas *canvas) [explicit] Constructor
Parameters:
canvas Plot canvas to be magnified
QwtPlotMagnifier::~QwtPlotMagnifier () [virtual]
Destructor.
Member Function Documentation
QwtPlotCanvas * QwtPlotMagnifier::canvas ()
Return observed plot canvas.
const QwtPlotCanvas * QwtPlotMagnifier::canvas () const
Return Observed plot canvas.
bool QwtMagnifier::eventFilter (QObject *o, QEvent *e) [virtual, inherited]
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 [inherited] See also:
setMouseButton()
void QwtMagnifier::getZoomInKey (int &key, int &modifiers) const [inherited] See also:
setZoomInKey()
void QwtMagnifier::getZoomOutKey (int &key, int &modifiers) const [inherited] See also:
setZoomOutKey()
bool QwtPlotMagnifier::isAxisEnabled (intaxis) const Test if an axis is enabled
Parameters:
axis Axis, see QwtPlot::Axis
Returns:
True, if the axis is enabled
See also:
setAxisEnabled()
bool QwtMagnifier::isEnabled () const [inherited] Returns:
true when enabled, false otherwise
See also:
setEnabled(), eventFilter()
double QwtMagnifier::keyFactor () const [inherited] Returns:
Key factor
See also:
setKeyFactor()
double QwtMagnifier::mouseFactor () const [inherited] Returns:
Mouse factor
See also:
setMouseFactor()
QWidget * QwtMagnifier::parentWidget () [inherited] Returns:
Parent widget, where the rescaling happens
const QWidget * QwtMagnifier::parentWidget () const [inherited] Returns:
Parent widget, where the rescaling happens
QwtPlot * QwtPlotMagnifier::plot ()
Return plot widget, containing the observed plot canvas.
const QwtPlot * QwtPlotMagnifier::plot () const
Return plot widget, containing the observed plot canvas.
void QwtPlotMagnifier::rescale (doublefactor) [protected, virtual] Zoom in/out the axes scales
Parameters:
factor A value < 1.0 zooms in, a value > 1.0 zooms out.
Implements QwtMagnifier.
void QwtPlotMagnifier::setAxisEnabled (intaxis, boolon)
En/Disable an axis. Axes that are enabled will be synchronized to the result of panning. All other axes will remain unchanged.
Parameters:
axis Axis, see QwtPlot::Axis
on On/Off
See also:
isAxisEnabled()
void QwtMagnifier::setEnabled (boolon) [inherited]
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) [inherited]
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) [inherited] 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) [inherited]
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) [inherited] 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) [inherited]
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) [inherited] 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) [inherited] 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 [inherited] Returns:
Wheel button state
See also:
setWheelButtonState()
double QwtMagnifier::wheelFactor () const [inherited] Returns:
Wheel factor
See also:
setWheelFactor()
void QwtMagnifier::widgetKeyPressEvent (QKeyEvent *ke) [protected, virtual, inherited] Handle a key press event for the observed widget.
Parameters:
ke Key event
See also:
eventFilter(), widgetKeyReleaseEvent()
void QwtMagnifier::widgetKeyReleaseEvent (QKeyEvent *) [protected, virtual, inherited] Handle a key release event for the observed widget.
Parameters:
ke Key event
See also:
eventFilter(), widgetKeyReleaseEvent()
void QwtMagnifier::widgetMouseMoveEvent (QMouseEvent *me) [protected, virtual, inherited] 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, inherited] Handle a mouse press event for the observed widget.
Parameters:
me Mouse event
See also:
eventFilter(), widgetMouseReleaseEvent(), widgetMouseMoveEvent()
void QwtMagnifier::widgetMouseReleaseEvent (QMouseEvent *) [protected, virtual, inherited] Handle a mouse release event for the observed
widget.
See also:
eventFilter(), widgetMousePressEvent(), widgetMouseMoveEvent(),
void QwtMagnifier::widgetWheelEvent (QWheelEvent *we) [protected, virtual, inherited] 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 QwtPlotMagnifier(3)