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 |
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) |
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.