QwtPlotMagnifier Class Reference
QwtPlotMagnifier provides zooming, by magnifying in steps. More...
#include <qwt_plot_magnifier.h>
Public Member Functions | |
| QwtPlotMagnifier (QwtPlotCanvas *) | |
| virtual | ~QwtPlotMagnifier () |
| void | setAxisEnabled (int axis, bool on) |
| bool | isAxisEnabled (int axis) const |
| QwtPlotCanvas * | canvas () |
| const QwtPlotCanvas * | canvas () const |
| QwtPlot * | plot () |
| const QwtPlot * | plot () const |
Protected Member Functions | |
| virtual void | rescale (double factor) |
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
| const QwtPlotCanvas * QwtPlotMagnifier::canvas | ( | ) | const |
Return Observed plot canvas.
| QwtPlotCanvas * QwtPlotMagnifier::canvas | ( | ) |
Return observed plot canvas.
| bool QwtPlotMagnifier::isAxisEnabled | ( | int | axis | ) | const |
Test if an axis is enabled
- Parameters:
-
axis Axis, see QwtPlot::Axis
- Returns:
- True, if the axis is enabled
- See also:
- setAxisEnabled()
| const QwtPlot * QwtPlotMagnifier::plot | ( | ) | const |
Return plot widget, containing the observed plot canvas.
| QwtPlot * QwtPlotMagnifier::plot | ( | ) |
Return plot widget, containing the observed plot canvas.
| void QwtPlotMagnifier::rescale | ( | double | factor | ) | [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 | ( | int | axis, | |
| bool | on | |||
| ) |
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()
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