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Qwt User's Guide 6.0.0
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QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval (
).
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#include <qwt_plot_intervalcurve.h>

Public Types | |
| enum | CurveStyle { NoCurve, Tube, UserCurve = 100 } |
| enum | PaintAttribute { ClipPolygons = 0x01, ClipSymbol = 0x02 } |
| typedef QFlags< PaintAttribute > | PaintAttributes |
Public Member Functions | |
| QwtPlotIntervalCurve (const QString &title=QString::null) | |
| QwtPlotIntervalCurve (const QwtText &title) | |
| virtual | ~QwtPlotIntervalCurve () |
| virtual int | rtti () const |
| void | setPaintAttribute (PaintAttribute, bool on=true) |
| bool | testPaintAttribute (PaintAttribute) const |
| void | setSamples (const QVector< QwtIntervalSample > &) |
| void | setPen (const QPen &) |
| const QPen & | pen () const |
| void | setBrush (const QBrush &) |
| const QBrush & | brush () const |
| void | setStyle (CurveStyle style) |
| CurveStyle | style () const |
| void | setSymbol (const QwtIntervalSymbol *) |
| const QwtIntervalSymbol * | symbol () const |
| virtual void | drawSeries (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const |
| virtual QRectF | boundingRect () const |
| virtual void | drawLegendIdentifier (QPainter *, const QRectF &) const |
Protected Member Functions | |
| void | init () |
| virtual void | drawTube (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const |
| virtual void | drawSymbols (QPainter *, const QwtIntervalSymbol &, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const |
QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval (
).
The representation depends on the style() and an optional symbol() that is displayed for each interval. QwtPlotIntervalCurve might be used to disply error bars or the area between 2 curves.
| typedef QFlags<PaintAttribute> QwtPlotIntervalCurve::PaintAttributes |
Paint attributes.
Curve styles. The default setting is QwtPlotIntervalCurve::Tube.
| NoCurve |
Don't draw a curve. Note: This doesn't affect the symbols. |
| Tube |
Build 2 curves from the upper and lower limits of the intervals and draw them with the pen(). The area between the curves is filled with the brush(). |
| UserCurve |
Styles >= QwtPlotIntervalCurve::UserCurve are reserved for derived classes that overload drawSeries() with additional application specific curve types. |
Attributes to modify the drawing algorithm.
| QwtPlotIntervalCurve::QwtPlotIntervalCurve | ( | const QString & | title = QString::null | ) | [explicit] |
Constructor
| title | Title of the curve |
| QwtPlotIntervalCurve::QwtPlotIntervalCurve | ( | const QwtText & | title | ) | [explicit] |
Constructor
| title | Title of the curve |
| QwtPlotIntervalCurve::~QwtPlotIntervalCurve | ( | ) | [virtual] |
Destructor.
| QRectF QwtPlotIntervalCurve::boundingRect | ( | ) | const [virtual] |
Reimplemented from QwtPlotSeriesItem< QwtIntervalSample >.
| const QBrush & QwtPlotIntervalCurve::brush | ( | ) | const |
| void QwtPlotIntervalCurve::drawLegendIdentifier | ( | QPainter * | painter, |
| const QRectF & | rect | ||
| ) | const [virtual] |
In case of Tibe stale() a plain rectangle is painted without a pen filled the brush(). If a symbol is assigned it is painted cebtered into rect.
| painter | Painter |
| rect | Bounding rectangle for the identifier |
Reimplemented from QwtLegendItemManager.
| void QwtPlotIntervalCurve::drawSeries | ( | QPainter * | painter, |
| const QwtScaleMap & | xMap, | ||
| const QwtScaleMap & | yMap, | ||
| const QRectF & | canvasRect, | ||
| int | from, | ||
| int | to | ||
| ) | const [virtual] |
Draw a subset of the samples
| painter | Painter |
| xMap | Maps x-values into pixel coordinates. |
| yMap | Maps y-values into pixel coordinates. |
| canvasRect | Contents rect of the canvas |
| from | Index of the first sample to be painted |
| to | Index of the last sample to be painted. If to < 0 the series will be painted to its last sample. |
Implements QwtPlotAbstractSeriesItem.
| void QwtPlotIntervalCurve::drawSymbols | ( | QPainter * | painter, |
| const QwtIntervalSymbol & | symbol, | ||
| const QwtScaleMap & | xMap, | ||
| const QwtScaleMap & | yMap, | ||
| const QRectF & | canvasRect, | ||
| int | from, | ||
| int | to | ||
| ) | const [protected, virtual] |
Draw symbols for a subset of the samples
| painter | Painter |
| symbol | Interval symbol |
| xMap | x map |
| yMap | y map |
| canvasRect | Contents rect of the canvas |
| from | Index of the first sample to be painted |
| to | Index of the last sample to be painted |
| void QwtPlotIntervalCurve::drawTube | ( | QPainter * | painter, |
| const QwtScaleMap & | xMap, | ||
| const QwtScaleMap & | yMap, | ||
| const QRectF & | canvasRect, | ||
| int | from, | ||
| int | to | ||
| ) | const [protected, virtual] |
Draw a tube
Builds 2 curves from the upper and lower limits of the intervals and draws them with the pen(). The area between the curves is filled with the brush().
| painter | Painter |
| xMap | Maps x-values into pixel coordinates. |
| yMap | Maps y-values into pixel coordinates. |
| canvasRect | Contents rect of the canvas |
| from | Index of the first sample to be painted |
| to | Index of the last sample to be painted. If to < 0 the series will be painted to its last sample. |
| void QwtPlotIntervalCurve::init | ( | ) | [protected] |
Initialize internal members.
| const QPen & QwtPlotIntervalCurve::pen | ( | ) | const |
| int QwtPlotIntervalCurve::rtti | ( | ) | const [virtual] |
Reimplemented from QwtPlotItem.
| void QwtPlotIntervalCurve::setBrush | ( | const QBrush & | brush | ) |
Assign a brush.
The brush is used to fill the area in Tube style().
| brush | Brush |
| void QwtPlotIntervalCurve::setPaintAttribute | ( | PaintAttribute | attribute, |
| bool | on = true |
||
| ) |
Specify an attribute how to draw the curve
| attribute | Paint attribute |
| on | On/Off |
| void QwtPlotIntervalCurve::setPen | ( | const QPen & | pen | ) |
| void QwtPlotIntervalCurve::setSamples | ( | const QVector< QwtIntervalSample > & | samples | ) |
Initialize data with an array of samples.
| samples | Vector of samples |
| void QwtPlotIntervalCurve::setStyle | ( | CurveStyle | style | ) |
| void QwtPlotIntervalCurve::setSymbol | ( | const QwtIntervalSymbol * | symbol | ) |
| QwtPlotIntervalCurve::CurveStyle QwtPlotIntervalCurve::style | ( | ) | const |
Return the current style.
| const QwtIntervalSymbol * QwtPlotIntervalCurve::symbol | ( | ) | const |
| bool QwtPlotIntervalCurve::testPaintAttribute | ( | PaintAttribute | attribute | ) | const |
Return the current paint attributes.
1.7.3