Provided by: libqwt-doc_6.0.0-1.2_all 
NAME
QwtPlotIntervalCurve -
QwtPlotIntervalCurve represents a series of samples, where each value is associated with
an interval ( $[y1,y2] = f(x)$ ).
SYNOPSIS
#include <qwt_plot_intervalcurve.h>
Inherits QwtPlotSeriesItem< QwtIntervalSample >.
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
Detailed Description
QwtPlotIntervalCurve represents a series of samples, where each value is associated with
an interval ( $[y1,y2] = f(x)$ ).
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.
Member Typedef Documentation
typedef QFlags<PaintAttribute> QwtPlotIntervalCurve::PaintAttributes
Paint attributes.
Member Enumeration Documentation
enum QwtPlotIntervalCurve::CurveStyle
Curve styles. The default setting is QwtPlotIntervalCurve::Tube. See also:
setStyle(), style()
Enumerator:
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.
enum QwtPlotIntervalCurve::PaintAttribute Attributes to modify the drawing algorithm.
See also:
setPaintAttribute(), testPaintAttribute()
Enumerator:
ClipPolygons
Clip polygons before painting them. In situations, where points are far outside the
visible area (f.e when zooming deep) this might be a substantial improvement for
the painting performance.
ClipSymbol
Check if a symbol is on the plot canvas before painting it.
Constructor & Destructor Documentation
QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QString &title = QString::null) [explicit]
Constructor
Parameters:
title Title of the curve
QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QwtText &title) [explicit] Constructor
Parameters:
title Title of the curve
QwtPlotIntervalCurve::~QwtPlotIntervalCurve () [virtual]
Destructor.
Member Function Documentation
QRectF QwtPlotIntervalCurve::boundingRect () const [virtual] Returns:
Bounding rectangle of all samples. For an empty series the rectangle is invalid.
Reimplemented from QwtPlotSeriesItem< QwtIntervalSample >.
const QBrush & QwtPlotIntervalCurve::brush () const Returns:
Brush used to fill the area in Tube style()
See also:
setBrush(), setStyle(), CurveStyle
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.
Parameters:
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, intfrom, intto) const [virtual] Draw a subset
of the samples
Parameters:
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.
See also:
drawTube(), drawSymbols()
Implements QwtPlotAbstractSeriesItem.
void QwtPlotIntervalCurve::drawSymbols (QPainter *painter, const QwtIntervalSymbol &symbol,
const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, intfrom,
intto) const [protected, virtual] Draw symbols for a subset of the samples
Parameters:
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
See also:
setSymbol(), drawSeries(), drawTube()
void QwtPlotIntervalCurve::drawTube (QPainter *painter, const QwtScaleMap &xMap, const
QwtScaleMap &yMap, const QRectF &canvasRect, intfrom, intto) 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().
Parameters:
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.
See also:
drawSeries(), drawSymbols()
void QwtPlotIntervalCurve::init () [protected]
Initialize internal members.
const QPen & QwtPlotIntervalCurve::pen () const
Return the pen used to draw the lines. See also:
setPen(), brush()
int QwtPlotIntervalCurve::rtti () const [virtual] Returns:
QwtPlotItem::Rtti_PlotIntervalCurve
Reimplemented from QwtPlotItem.
void QwtPlotIntervalCurve::setBrush (const QBrush &brush) Assign a brush.
The brush is used to fill the area in Tube style().
Parameters:
brush Brush
See also:
brush(), pen(), setStyle(), CurveStyle
void QwtPlotIntervalCurve::setPaintAttribute (PaintAttributeattribute, boolon = true) Specify
an attribute how to draw the curve
Parameters:
attribute Paint attribute
on On/Off
See also:
testPaintAttribute()
void QwtPlotIntervalCurve::setPen (const QPen &pen)
Assign a pen. Parameters:
pen New pen
See also:
pen(), brush()
void QwtPlotIntervalCurve::setSamples (const QVector< QwtIntervalSample > &samples) Initialize
data with an array of samples.
Parameters:
samples Vector of samples
void QwtPlotIntervalCurve::setStyle (CurveStylestyle) Set the curve's drawing style
Parameters:
style Curve style
See also:
CurveStyle, style()
void QwtPlotIntervalCurve::setSymbol (const QwtIntervalSymbol *symbol) Assign a symbol.
Parameters:
symbol Symbol
See also:
symbol()
QwtPlotIntervalCurve::CurveStyle QwtPlotIntervalCurve::style () const
Return the current style. See also:
setStyle()
const QwtIntervalSymbol * QwtPlotIntervalCurve::symbol () const Returns:
Current symbol or NULL, when no symbol has been assigned
See also:
setSymbol()
bool QwtPlotIntervalCurve::testPaintAttribute (PaintAttributeattribute) const
Return the current paint attributes. See also:
PaintAttribute, setPaintAttribute()
Author
Generated automatically by Doxygen for Qwt User's Guide from the source code.