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Qwt User's Guide
6.0.2
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#include <qwt_plot_magnifier.h>

Public Member Functions | |
| QwtPlotMagnifier (QwtPlotCanvas *) | |
| virtual | ~QwtPlotMagnifier () |
| QwtPlotCanvas * | canvas () |
| const QwtPlotCanvas * | canvas () const |
| bool | isAxisEnabled (int axis) const |
| QwtPlot * | plot () |
| const QwtPlot * | plot () const |
| void | setAxisEnabled (int axis, bool on) |
Public Member Functions inherited from QwtMagnifier | |
| QwtMagnifier (QWidget *) | |
| virtual | ~QwtMagnifier () |
| 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 | isEnabled () const |
| double | keyFactor () const |
| double | mouseFactor () const |
| QWidget * | parentWidget () |
| const QWidget * | parentWidget () const |
| 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 |
Protected Member Functions | |
| virtual void | rescale (double factor) |
Protected Member Functions inherited from QwtMagnifier | |
| virtual void | widgetKeyPressEvent (QKeyEvent *) |
| virtual void | widgetKeyReleaseEvent (QKeyEvent *) |
| virtual void | widgetMouseMoveEvent (QMouseEvent *) |
| virtual void | widgetMousePressEvent (QMouseEvent *) |
| virtual void | widgetMouseReleaseEvent (QMouseEvent *) |
| virtual void | widgetWheelEvent (QWheelEvent *) |
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.
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explicit |
Constructor
| canvas | Plot canvas to be magnified |
| bool QwtPlotMagnifier::isAxisEnabled | ( | int | axis | ) | const |
Test if an axis is enabled
| axis | Axis, see QwtPlot::Axis |
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protectedvirtual |
Zoom in/out the axes scales
| factor | A value < 1.0 zooms in, a value > 1.0 zooms out. |
Implements QwtMagnifier.
| void QwtPlotMagnifier::setAxisEnabled | ( | int | axis, |
| bool | on | ||
| ) |
En/Disable an axis.
Only Axes that are enabled will be zoomed. All other axes will remain unchanged.
| axis | Axis, see QwtPlot::Axis |
| on | On/Off |
1.8.1