conflicting packages
QwtPlotRescaler(3) | Qwt User's Guide | QwtPlotRescaler(3) |
NAME¶
QwtPlotRescaler - QwtPlotRescaler takes care of fixed aspect ratios for plot scales.SYNOPSIS¶
#include <qwt_plot_rescaler.h>Public Types¶
enum RescalePolicy { Fixed, Expanding, Fitting }
Public Member Functions¶
QwtPlotRescaler (QwtPlotCanvas *, int referenceAxis=QwtPlot::xBottom, RescalePolicy=Expanding)
Protected Member Functions¶
virtual void canvasResizeEvent (QResizeEvent *)
Detailed Description¶
QwtPlotRescaler takes care of fixed aspect ratios for plot scales.Member Enumeration Documentation¶
enum QwtPlotRescaler::ExpandingDirection When rescalePolicy() is set to Expanding its direction depends on ExpandingDirection¶
Enumerator:- ExpandUp
- The upper limit of the scale is adjusted.
- ExpandDown
- The lower limit of the scale is adjusted.
- ExpandBoth
- Both limits of the scale are adjusted.
enum QwtPlotRescaler::RescalePolicy The rescale policy defines how to rescale the reference axis and their depending axes.¶
See also:ExpandingDirection,
setIntervalHint()
- Fixed
- The interval of the reference axis remains unchanged, when the geometry of the canvas changes. All other axes will be adjusted according to their aspect ratio.
- Expanding
- The interval of the reference axis will be shrinked/expanded, when the geometry of the canvas changes. All other axes will be adjusted according to their aspect ratio.
- Fitting
- The intervals of the axes are calculated, so that all axes include their interval hint.
Constructor & Destructor Documentation¶
QwtPlotRescaler::QwtPlotRescaler (QwtPlotCanvas *canvas, intreferenceAxis = QwtPlot::xBottom, RescalePolicypolicy = Expanding) [explicit] Constructor¶
Parameters:canvas Canvas
referenceAxis Reference axis, see RescalePolicy
policy Rescale policy
See also:
setRescalePolicy(),
setReferenceAxis()
QwtPlotRescaler::~QwtPlotRescaler () [virtual]¶
Destructor.Member Function Documentation¶
double QwtPlotRescaler::aspectRatio (intaxis) const Return aspect ratio between an axis and the reference axis.¶
Parameters:axis Axis index ( see QwtPlot::AxisId
)
See also:
setAspectRatio()
const QwtPlotCanvas * QwtPlotRescaler::canvas () const Returns:¶
plot canvas
QwtPlotCanvas * QwtPlotRescaler::canvas () Returns:¶
plot canvas
void QwtPlotRescaler::canvasResizeEvent (QResizeEvent *event) [protected, virtual] Event handler for resize events of the plot canvas¶
Parameters:event Resize event
See also:
rescale()
bool QwtPlotRescaler::eventFilter (QObject *o, QEvent *e) [virtual]¶
Event filter for the plot canvas.QwtPlotRescaler::ExpandingDirection QwtPlotRescaler::expandingDirection (intaxis) const Return direction in which an axis should be expanded¶
Parameters:axis Axis index ( see QwtPlot::AxisId
)
See also:
setExpandingDirection()
QwtInterval QwtPlotRescaler::expandInterval (const QwtInterval &interval, doublewidth, ExpandingDirectiondirection) const [protected] Expand the interval¶
Parameters:interval Interval to be expanded
width Distance to be added to the interval
direction Direction of the expand operation
Returns:
Expanded interval
QwtInterval QwtPlotRescaler::expandScale (intaxis, const QSize &oldSize, const QSize &newSize) const [protected, virtual] Calculate the new scale interval of a plot axis¶
Parameters:axis Axis index ( see QwtPlot::AxisId )
oldSize Previous size of the canvas
newSize New size of the canvas
Returns:
Calculated new interval for the axis
QwtInterval QwtPlotRescaler::interval (intaxis) const [protected] Return interval of an axis¶
Parameters:axis Axis index ( see QwtPlot::AxisId
)
QwtInterval QwtPlotRescaler::intervalHint (intaxis) const Parameters:¶
axis Axis, see
QwtPlot::Axis
Returns:
Interval hint
See also:
setIntervalHint(),
RescalePolicy
bool QwtPlotRescaler::isEnabled () const Returns:¶
true when enabled, false otherwise
See also:
setEnabled, eventFilter()
Qt::Orientation QwtPlotRescaler::orientation (intaxis) const [protected] Return orientation of an axis¶
Parameters:axis Axis index ( see QwtPlot::AxisId
)
QwtPlot * QwtPlotRescaler::plot () Returns:¶
plot widget
const QwtPlot * QwtPlotRescaler::plot () const Returns:¶
plot widget
int QwtPlotRescaler::referenceAxis () const Returns:¶
Reference axis ( see RescalePolicy )
See also:
setReferenceAxis()
void QwtPlotRescaler::rescale () const¶
Adjust the plot axes scales.void QwtPlotRescaler::rescale (const QSize &oldSize, const QSize &newSize) const [protected, virtual] Adjust the plot axes scales¶
Parameters:oldSize Previous size of the canvas
newSize New size of the canvas
QwtPlotRescaler::RescalePolicy QwtPlotRescaler::rescalePolicy () const Returns:¶
Rescale policy
See also:
setRescalePolicy()
void QwtPlotRescaler::setAspectRatio (intaxis, doubleratio) Set the aspect ratio between the scale of the reference axis and another scale. The default ratio is 1.0¶
Parameters:axis Axis index ( see QwtPlot::AxisId )
ratio Aspect ratio
See also:
aspectRatio()
void QwtPlotRescaler::setAspectRatio (doubleratio) Set the aspect ratio between the scale of the reference axis and the other scales. The default ratio is 1.0¶
Parameters:ratio Aspect ratio
See also:
aspectRatio()
void QwtPlotRescaler::setEnabled (boolon)¶
En/disable the rescaler. When enabled is true an event filter is installed for the canvas, otherwise the event filter is removed. Parameters:on true or false
See also:
isEnabled(), eventFilter()
void QwtPlotRescaler::setExpandingDirection (intaxis, ExpandingDirectiondirection) Set the direction in which an axis should be expanded¶
Parameters:axis Axis index ( see QwtPlot::AxisId )
direction Direction
See also:
expandingDirection()
void QwtPlotRescaler::setExpandingDirection (ExpandingDirectiondirection) Set the direction in which all axis should be expanded¶
Parameters:direction Direction
See also:
expandingDirection()
void QwtPlotRescaler::setIntervalHint (intaxis, const QwtInterval &interval) Set an interval hint for an axis¶
In Fitting mode, the hint is used as minimal interval taht always needs to be displayed. Parameters:axis Axis, see QwtPlot::Axis
interval Axis
See also:
intervalHint(),
RescalePolicy
void QwtPlotRescaler::setReferenceAxis (intaxis) Set the reference axis ( see RescalePolicy )¶
Parameters:axis Axis index ( QwtPlot::Axis
)
See also:
referenceAxis()
void QwtPlotRescaler::setRescalePolicy (RescalePolicypolicy) Change the rescale policy¶
Parameters:policy Rescale policy
See also:
rescalePolicy()
QwtInterval QwtPlotRescaler::syncScale (intaxis, const QwtInterval &reference, const QSize &size) const [protected, virtual] Synchronize an axis scale according to the scale of the reference axis¶
Parameters:axis Axis index ( see QwtPlot::AxisId )
reference Interval of the reference axis
size Size of the canvas
void QwtPlotRescaler::updateScales (QwtIntervalintervals[QwtPlot::axisCnt]) const [protected, virtual] Update the axes scales¶
Parameters:intervals Scale intervals
Author¶
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