| Qwt User's Guide 6.3.0
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QwtPlotMagnifier provides zooming, by magnifying in steps. More...
#include <qwt_plot_magnifier.h>
| 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 *) | 
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.
Definition at line 30 of file qwt_plot_magnifier.h.
| 
 | explicit | 
Constructor
| canvas | Plot canvas to be magnified | 
Definition at line 30 of file qwt_plot_magnifier.cpp.
| 
 | virtual | 
Destructor.
Definition at line 37 of file qwt_plot_magnifier.cpp.
| 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
| axisId | Axis | 
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.
| 
 | overridevirtualslot | 
Zoom in/out the axes scales
| 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.
| axisId | Axis | 
| on | On/Off | 
Definition at line 53 of file qwt_plot_magnifier.cpp.