| Qwt User's Guide
    6.2.0
    | 
QwtPolarMagnifier provides zooming, by magnifying in steps. More...
#include <qwt_polar_magnifier.h>
| Public Slots | |
| virtual void | rescale (double factor) override | 
| void | unzoom () | 
| Unzoom the plot widget. | |
| Public Member Functions | |
| QwtPolarMagnifier (QwtPolarCanvas *) | |
| virtual | ~QwtPolarMagnifier () | 
| Destructor. | |
| void | setUnzoomKey (int key, int modifiers) | 
| void | getUnzoomKey (int &key, int &modifiers) const | 
| QwtPolarPlot * | plot () | 
| const QwtPolarPlot * | plot () const | 
| QwtPolarCanvas * | canvas () | 
| const QwtPolarCanvas * | canvas () const | 
|  Public Member Functions inherited from QwtMagnifier | |
| QwtMagnifier (QWidget *) | |
| virtual | ~QwtMagnifier () | 
| Destructor. | |
| QWidget * | parentWidget () | 
| const QWidget * | parentWidget () const | 
| void | setEnabled (bool) | 
| En/disable the magnifier.  More... | |
| bool | isEnabled () const | 
| void | setMouseFactor (double) | 
| Change the mouse factor.  More... | |
| 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.  More... | |
| double | wheelFactor () const | 
| void | setWheelModifiers (Qt::KeyboardModifiers) | 
| Qt::KeyboardModifiers | wheelModifiers () const | 
| void | setKeyFactor (double) | 
| Change the key factor.  More... | |
| 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.  More... | |
| void | setZoomOutKey (int key, Qt::KeyboardModifiers=Qt::NoModifier) | 
| void | getZoomOutKey (int &key, Qt::KeyboardModifiers &) const | 
| Retrieve the settings of the zoom out key.  More... | |
| virtual bool | eventFilter (QObject *, QEvent *) override | 
| Event filter.  More... | |
| Protected Member Functions | |
| virtual void | widgetKeyPressEvent (QKeyEvent *) override | 
|  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 | widgetKeyReleaseEvent (QKeyEvent *) | 
QwtPolarMagnifier 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 QwtPolarPanner it is possible to implement an individual navigation of the plot canvas.
Definition at line 30 of file qwt_polar_magnifier.h.
| 
 | explicit | 
Constructor
| canvas | Plot canvas to be magnified | 
Definition at line 34 of file qwt_polar_magnifier.cpp.
| QwtPolarCanvas * QwtPolarMagnifier::canvas | ( | ) | 
Definition at line 74 of file qwt_polar_magnifier.cpp.
| const QwtPolarCanvas * QwtPolarMagnifier::canvas | ( | ) | const | 
Definition at line 80 of file qwt_polar_magnifier.cpp.
| void QwtPolarMagnifier::getUnzoomKey | ( | int & | key, | 
| int & | modifiers | ||
| ) | const | 
| key | Key code | 
| modifiers | Modifiers | 
Definition at line 67 of file qwt_polar_magnifier.cpp.
| QwtPolarPlot * QwtPolarMagnifier::plot | ( | ) | 
Definition at line 86 of file qwt_polar_magnifier.cpp.
| const QwtPolarPlot * QwtPolarMagnifier::plot | ( | ) | const | 
Definition at line 96 of file qwt_polar_magnifier.cpp.
| 
 | overridevirtualslot | 
Zoom in/out the zoomed area
| factor | A value < 1.0 zooms in, a value > 1.0 zooms out. | 
Definition at line 129 of file qwt_polar_magnifier.cpp.
| void QwtPolarMagnifier::setUnzoomKey | ( | int | key, | 
| int | modifiers | ||
| ) | 
Assign key and modifiers, that are used for unzooming The default combination is Qt::Key_Home + Qt::NoModifier.
| key | Key code | 
| modifiers | Modifiers | 
Definition at line 54 of file qwt_polar_magnifier.cpp.
| 
 | overrideprotectedvirtual | 
Handle a key press event for the observed widget.
| event | Key event | 
Reimplemented from QwtMagnifier.
Definition at line 110 of file qwt_polar_magnifier.cpp.