QwtPlotMagnifier - QwtPlotMagnifier provides zooming, by magnifying in steps.

NAME  SYNOPSIS  Public Slots  Public Member Functions  Additional Inherited Members  Detailed Description  Constructor & Destructor Documentation  QwtPlotMagnifier::QwtPlotMagnifier (QWidget * canvas) [explicit]  QwtPlotMagnifier::˜QwtPlotMagnifier () [virtual]  Member Function Documentation  QWidget * QwtPlotMagnifier::canvas ()  const QWidget * QwtPlotMagnifier::canvas () const  bool QwtPlotMagnifier::isAxisEnabled (QwtAxisId axisId) const  QwtPlot * QwtPlotMagnifier::plot ()  const QwtPlot * QwtPlotMagnifier::plot () const  void QwtPlotMagnifier::rescale (double factor) [override], [virtual],[slot]  void QwtPlotMagnifier::setAxisEnabled (QwtAxisId axisId, bool on)  Author 

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NAME

QwtPlotMagnifier − QwtPlotMagnifier provides zooming, by magnifying in steps.

SYNOPSIS

#include <qwt_plot_magnifier.h>

Inherits QwtMagnifier.

Public Slots

virtual void rescale (double factor) override

Public Member Functions

QwtPlotMagnifier (QWidget *)
virtual ˜QwtPlotMagnifier ()
Destructor.
void setAxisEnabled (QwtAxisId, bool on)
En/Disable an axis.
bool isAxisEnabled (QwtAxisId) const
QWidget * canvas ()
Return observed plot canvas.
const QWidget * canvas () const
Return Observed plot canvas.
QwtPlot * plot ()
Return plot widget, containing the observed plot canvas.
const QwtPlot * plot () const
Return plot widget, containing the observed plot canvas.

Public Member Functions inherited from QwtMagnifier

QwtMagnifier (QWidget *)
virtual ˜QwtMagnifier ()
Destructor.
QWidget * parentWidget ()
const QWidget * parentWidget () const
void setEnabled (bool)
En/disable the magnifier.
bool isEnabled () const
void setMouseFactor (double)
Change the mouse factor.
double mouseFactor () const
void setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=Qt::NoModifier)
void getMouseButton (Qt::MouseButton &, Qt::KeyboardModifiers &) const
void setWheelFactor (double)
Change the wheel factor.
double wheelFactor () const
void setWheelModifiers (Qt::KeyboardModifiers)
Qt::KeyboardModifiers wheelModifiers () const
void setKeyFactor (double)
Change the key factor.
double keyFactor () const
void setZoomInKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
void getZoomInKey (int &key, Qt::KeyboardModifiers &) const
Retrieve the settings of the zoom in key.
void setZoomOutKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
void getZoomOutKey (int &key, Qt::KeyboardModifiers &) const
Retrieve the settings of the zoom out key.
virtual bool eventFilter (QObject *, QEvent *) override
Event filter.

Additional Inherited Members

Protected Member Functions inherited from QwtMagnifier

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

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

Definition at line 30 of file qwt_plot_magnifier.h.

Constructor & Destructor Documentation

QwtPlotMagnifier::QwtPlotMagnifier (QWidget * canvas) [explicit]

Constructor

Parameters

canvas Plot canvas to be magnified

Definition at line 30 of file qwt_plot_magnifier.cpp.

QwtPlotMagnifier::˜QwtPlotMagnifier () [virtual]

Destructor.

Definition at line 37 of file qwt_plot_magnifier.cpp.

Member Function Documentation

QWidget * QwtPlotMagnifier::canvas ()

Return observed plot canvas.

Definition at line 76 of file qwt_plot_magnifier.cpp.

const QWidget * QwtPlotMagnifier::canvas () const

Return Observed plot canvas.

Definition at line 82 of file qwt_plot_magnifier.cpp.

bool QwtPlotMagnifier::isAxisEnabled (QwtAxisId axisId) const

Test if an axis is enabled

Parameters

axisId Axis

Returns

True, if the axis is enabled

See also

setAxisEnabled()

Definition at line 67 of file qwt_plot_magnifier.cpp.

QwtPlot * QwtPlotMagnifier::plot ()

Return plot widget, containing the observed plot canvas.

Definition at line 88 of file qwt_plot_magnifier.cpp.

const QwtPlot * QwtPlotMagnifier::plot () const

Return plot widget, containing the observed plot canvas.

Definition at line 98 of file qwt_plot_magnifier.cpp.

void QwtPlotMagnifier::rescale (double factor) [override], [virtual],[slot]

Zoom in/out the axes scales

Parameters

factor A value < 1.0 zooms in, a value > 1.0 zooms out.

Definition at line 111 of file qwt_plot_magnifier.cpp.

void QwtPlotMagnifier::setAxisEnabled (QwtAxisId axisId, bool on)

En/Disable an axis. Only Axes that are enabled will be zoomed. All other axes will remain unchanged.

Parameters

axisId Axis
on On/Off

See also

isAxisEnabled()

Definition at line 53 of file qwt_plot_magnifier.cpp.

Author

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