QwtPlotMagnifier - Man Page
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::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::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::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
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