# -*- coding: utf-8 -*-
#
# Licensed under the terms of the Qwt License
# Copyright (c) 2002 Uwe Rathmann, for the original C++ code
# Copyright (c) 2015 Pierre Raybaut, for the Python translation/optimization
# (see LICENSE file for more details)
"""
QwtPlotCurve
------------
.. autoclass:: QwtPlotCurve
:members:
"""
from qwt.text import QwtText
from qwt.plot import QwtPlotItem, QwtPlotItem_PrivateData
from qwt.painter import QwtPainter
from qwt.math import qwtSqr
from qwt.graphic import QwtGraphic
from qwt.plot_series import (QwtPlotSeriesItem, QwtSeriesStore,
QwtSeriesData, QwtPointArrayData)
from qwt.symbol import QwtSymbol
from qwt.plot_directpainter import QwtPlotDirectPainter
from qwt.qt.QtGui import QPen, QBrush, QPainter, QPolygonF, QColor
from qwt.qt.QtCore import QSize, Qt, QRectF, QPointF
import numpy as np
def qwtUpdateLegendIconSize(curve):
if curve.symbol() and\
curve.testLegendAttribute(QwtPlotCurve.LegendShowSymbol):
sz = curve.symbol().boundingRect().size()
sz += QSize(2, 2)
if curve.testLegendAttribute(QwtPlotCurve.LegendShowLine):
w = np.ceil(1.5*sz.width())
if w % 2:
w += 1
sz.setWidth(max([8, w]))
curve.setLegendIconSize(sz)
def qwtVerifyRange(size, i1, i2):
if size < 1:
return 0
i1 = max([0, min([i1, size-1])])
i2 = max([0, min([i2, size-1])])
if i1 > i2:
i1, i2 = i2, i1
return i2-i1+1
def series_to_polyline(xMap, yMap, series, from_, to):
"""
Convert series data to QPolygon(F) polyline
"""
polyline = QPolygonF(to-from_+1)
pointer = polyline.data()
dtype, tinfo = np.float, np.finfo # integers: = np.int, np.iinfo
pointer.setsize(2*polyline.size()*tinfo(dtype).dtype.itemsize)
memory = np.frombuffer(pointer, dtype)
memory[:(to-from_)*2+1:2] = xMap.transform(series.xData()[from_:to+1])
memory[1:(to-from_)*2+2:2] = yMap.transform(series.yData()[from_:to+1])
return polyline
class QwtPlotCurve_PrivateData(QwtPlotItem_PrivateData):
def __init__(self):
QwtPlotItem_PrivateData.__init__(self)
self.style = QwtPlotCurve.Lines
self.baseline = 0.
self.symbol = None
self.attributes = 0
self.legendAttributes = QwtPlotCurve.LegendShowLine
self.pen = QPen(Qt.black)
self.brush = QBrush()
class QwtPlotCurve(QwtPlotSeriesItem, QwtSeriesStore):
"""
A plot item, that represents a series of points
A curve is the representation of a series of points in the x-y plane.
It supports different display styles and symbols.
.. seealso::
:py:class:`qwt.symbol.QwtSymbol()`,
:py:class:`qwt.scale_map.QwtScaleMap()`
Curve styles:
* `QwtPlotCurve.NoCurve`:
Don't draw a curve. Note: This doesn't affect the symbols.
* `QwtPlotCurve.Lines`:
Connect the points with straight lines.
* `QwtPlotCurve.Sticks`:
Draw vertical or horizontal sticks ( depending on the
orientation() ) from a baseline which is defined by setBaseline().
* `QwtPlotCurve.Steps`:
Connect the points with a step function. The step function
is drawn from the left to the right or vice versa,
depending on the QwtPlotCurve::Inverted attribute.
* `QwtPlotCurve.Dots`:
Draw dots at the locations of the data points. Note:
This is different from a dotted line (see setPen()), and faster
as a curve in QwtPlotCurve::NoStyle style and a symbol
painting a point.
* `QwtPlotCurve.UserCurve`:
Styles >= QwtPlotCurve.UserCurve are reserved for derived
classes of QwtPlotCurve that overload drawCurve() with
additional application specific curve types.
Curve attributes:
* `QwtPlotCurve.Inverted`:
For `QwtPlotCurve.Steps` only.
Draws a step function from the right to the left.
Legend attributes:
* `QwtPlotCurve.LegendNoAttribute`:
`QwtPlotCurve` tries to find a color representing the curve
and paints a rectangle with it.
* `QwtPlotCurve.LegendShowLine`:
If the style() is not `QwtPlotCurve.NoCurve` a line
is painted with the curve pen().
* `QwtPlotCurve.LegendShowSymbol`:
If the curve has a valid symbol it is painted.
* `QwtPlotCurve.LegendShowBrush`:
If the curve has a brush a rectangle filled with the
curve brush() is painted.
.. py:class:: QwtPlotCurve([title=None])
Constructor
:param title: Curve title
:type title: qwt.text.QwtText or str or None
"""
# enum CurveStyle
NoCurve = -1
Lines, Sticks, Steps, Dots = list(range(4))
UserCurve = 100
# enum CurveAttribute
Inverted = 0x01
# enum LegendAttribute
LegendNoAttribute = 0x00
LegendShowLine = 0x01
LegendShowSymbol = 0x02
LegendShowBrush = 0x04
def __init__(self, title=None):
if title is None:
title = QwtText("")
if not isinstance(title, QwtText):
title = QwtText(title)
self.__data = None
QwtPlotSeriesItem.__init__(self, title)
QwtSeriesStore.__init__(self)
self.init()
def init(self):
"""Initialize internal members"""
self.__data = QwtPlotCurve_PrivateData()
self.setItemAttribute(QwtPlotItem.Legend)
self.setItemAttribute(QwtPlotItem.AutoScale)
self.setData(QwtPointArrayData())
self.setZ(20.)
def rtti(self):
""":return: `QwtPlotItem.Rtti_PlotCurve`"""
return QwtPlotItem.Rtti_PlotCurve
def setLegendAttribute(self, attribute, on=True):
"""
Specify an attribute how to draw the legend icon
Legend attributes:
* `QwtPlotCurve.LegendNoAttribute`
* `QwtPlotCurve.LegendShowLine`
* `QwtPlotCurve.LegendShowSymbol`
* `QwtPlotCurve.LegendShowBrush`
:param int attribute: Legend attribute
:param bool on: On/Off
.. seealso::
:py:meth:`testLegendAttribute()`, :py:meth:`legendIcon()`
"""
if on != self.testLegendAttribute(attribute):
if on:
self.__data.legendAttributes |= attribute
else:
self.__data.legendAttributes &= ~attribute
qwtUpdateLegendIconSize(self)
self.legendChanged()
def testLegendAttribute(self, attribute):
"""
:param int attribute: Legend attribute
:return: True, when attribute is enabled
.. seealso::
:py:meth:`setLegendAttribute()`
"""
return self.__data.legendAttributes & attribute
def setStyle(self, style):
"""
Set the curve's drawing style
Valid curve styles:
* `QwtPlotCurve.NoCurve`
* `QwtPlotCurve.Lines`
* `QwtPlotCurve.Sticks`
* `QwtPlotCurve.Steps`
* `QwtPlotCurve.Dots`
* `QwtPlotCurve.UserCurve`
:param int style: Curve style
.. seealso::
:py:meth:`style()`
"""
if style != self.__data.style:
self.__data.style = style
self.legendChanged()
self.itemChanged()
def style(self):
"""
:return: Style of the curve
.. seealso::
:py:meth:`setStyle()`
"""
return self.__data.style
def setSymbol(self, symbol):
"""
Assign a symbol
The curve will take the ownership of the symbol, hence the previously
set symbol will be delete by setting a new one. If symbol is None no
symbol will be drawn.
:param qwt.symbol.QwtSymbol symbol: Symbol
.. seealso::
:py:meth:`symbol()`
"""
if symbol != self.__data.symbol:
self.__data.symbol = symbol
qwtUpdateLegendIconSize(self)
self.legendChanged()
self.itemChanged()
def symbol(self):
"""
:return: Current symbol or None, when no symbol has been assigned
.. seealso::
:py:meth:`setSymbol()`
"""
return self.__data.symbol
def setPen(self, *args):
"""
Build and/or assign a pen, depending on the arguments.
.. py:method:: setPen(color, width, style)
Build and assign a pen
In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it
non cosmetic (see `QPen.isCosmetic()`). This method signature has
been introduced to hide this incompatibility.
:param QColor color: Pen color
:param float width: Pen width
:param Qt.PenStyle style: Pen style
.. py:method:: setPen(pen)
Assign a pen
:param QPen pen: New pen
.. seealso::
:py:meth:`pen()`, :py:meth:`brush()`
"""
if len(args) == 3:
color, width, style = args
elif len(args) == 1:
pen, = args
else:
raise TypeError("%s().setPen() takes 1 or 3 argument(s) (%s given)"\
% (self.__class__.__name__, len(args)))
if pen != self.__data.pen:
if isinstance(pen, QColor):
pen = QPen(pen)
else:
assert isinstance(pen, QPen)
self.__data.pen = pen
self.legendChanged()
self.itemChanged()
def pen(self):
"""
:return: Pen used to draw the lines
.. seealso::
:py:meth:`setPen()`, :py:meth:`brush()`
"""
return self.__data.pen
def setBrush(self, brush):
"""
Assign a brush.
In case of `brush.style() != QBrush.NoBrush`
and `style() != QwtPlotCurve.Sticks`
the area between the curve and the baseline will be filled.
In case `not brush.color().isValid()` the area will be filled by
`pen.color()`. The fill algorithm simply connects the first and the
last curve point to the baseline. So the curve data has to be sorted
(ascending or descending).
:param brush: New brush
:type brush: QBrush or QColor
.. seealso::
:py:meth:`brush()`, :py:meth:`setBaseline()`, :py:meth:`baseline()`
"""
if isinstance(brush, QColor):
brush = QBrush(brush)
else:
assert isinstance(brush, QBrush)
if brush != self.__data.brush:
self.__data.brush = brush
self.legendChanged()
self.itemChanged()
def brush(self):
"""
:return: Brush used to fill the area between lines and the baseline
.. seealso::
:py:meth:`setBrush()`, :py:meth:`setBaseline()`,
:py:meth:`baseline()`
"""
return self.__data.brush
def directPaint(self, from_, to):
"""
When observing a measurement while it is running, new points have
to be added to an existing seriesItem. This method can be used to
display them avoiding a complete redraw of the canvas.
Setting `plot().canvas().setAttribute(Qt.WA_PaintOutsidePaintEvent, True)`
will result in faster painting, if the paint engine of the canvas
widget supports this feature.
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted
.. seealso::
:py:meth:`drawSeries()`
"""
directPainter = QwtPlotDirectPainter(self.plot())
directPainter.drawSeries(self, from_, to)
def drawSeries(self, painter, xMap, yMap, canvasRect, from_, to):
"""
Draw an interval of the curve
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`drawCurve()`, :py:meth:`drawSymbols()`
"""
numSamples = self.dataSize()
if not painter or numSamples <= 0:
return
if to < 0:
to = numSamples-1
if qwtVerifyRange(numSamples, from_, to) > 0:
painter.save()
painter.setPen(self.__data.pen)
self.drawCurve(painter, self.__data.style, xMap, yMap, canvasRect,
from_, to)
painter.restore()
if self.__data.symbol and\
self.__data.symbol.style() != QwtSymbol.NoSymbol:
painter.save()
self.drawSymbols(painter, self.__data.symbol,
xMap, yMap, canvasRect, from_, to)
painter.restore()
def drawCurve(self, painter, style, xMap, yMap, canvasRect, from_, to):
"""
Draw the line part (without symbols) of a curve interval.
:param QPainter painter: Painter
:param int style: curve style, see `QwtPlotCurve.CurveStyle`
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`draw()`, :py:meth:`drawDots()`, :py:meth:`drawLines()`,
:py:meth:`drawSteps()`, :py:meth:`drawSticks()`
"""
if style == self.Lines:
self.drawLines(painter, xMap, yMap, canvasRect, from_, to)
elif style == self.Sticks:
self.drawSticks(painter, xMap, yMap, canvasRect, from_, to)
elif style == self.Steps:
self.drawSteps(painter, xMap, yMap, canvasRect, from_, to)
elif style == self.Dots:
self.drawDots(painter, xMap, yMap, canvasRect, from_, to)
def drawLines(self, painter, xMap, yMap, canvasRect, from_, to):
"""
Draw lines
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`draw()`, :py:meth:`drawDots()`,
:py:meth:`drawSteps()`, :py:meth:`drawSticks()`
"""
if from_ > to:
return
doFill = self.__data.brush.style() != Qt.NoBrush\
and self.__data.brush.color().alpha() > 0
polyline = series_to_polyline(xMap, yMap, self.data(), from_, to)
painter.drawPolyline(polyline)
if doFill:
self.fillCurve(painter, xMap, yMap, canvasRect, polyline)
def drawSticks(self, painter, xMap, yMap, canvasRect, from_, to):
"""
Draw sticks
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`draw()`, :py:meth:`drawDots()`,
:py:meth:`drawSteps()`, :py:meth:`drawLines()`
"""
painter.save()
painter.setRenderHint(QPainter.Antialiasing, False)
x0 = xMap.transform(self.__data.baseline)
y0 = yMap.transform(self.__data.baseline)
o = self.orientation()
series = self.data()
for i in range(from_, to+1):
sample = series.sample(i)
xi = xMap.transform(sample.x())
yi = yMap.transform(sample.y())
if o == Qt.Horizontal:
painter.drawLine(xi, y0, xi, yi)
else:
painter.drawLine(x0, yi, xi, yi)
painter.restore()
def drawDots(self, painter, xMap, yMap, canvasRect, from_, to):
"""
Draw dots
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`draw()`, :py:meth:`drawSticks()`,
:py:meth:`drawSteps()`, :py:meth:`drawLines()`
"""
doFill = self.__data.brush.style() != Qt.NoBrush\
and self.__data.brush.color().alpha() > 0
polyline = series_to_polyline(xMap, yMap, self.data(), from_, to)
painter.drawPoints(polyline)
if doFill:
self.fillCurve(painter, xMap, yMap, canvasRect, polyline)
def drawSteps(self, painter, xMap, yMap, canvasRect, from_, to):
"""
Draw steps
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`draw()`, :py:meth:`drawSticks()`,
:py:meth:`drawDots()`, :py:meth:`drawLines()`
"""
polygon = QPolygonF(2*(to-from_)+1)
inverted = self.orientation() == Qt.Vertical
if self.__data.attributes & self.Inverted:
inverted = not inverted
series = self.data()
ip = 0
for i in range(from_, to+1):
sample = series.sample(i)
xi = xMap.transform(sample.x())
yi = yMap.transform(sample.y())
if ip > 0:
p0 = polygon[ip-2]
if inverted:
polygon[ip-1] = QPointF(p0.x(), yi)
else:
polygon[ip-1] = QPointF(xi, p0.y())
polygon[ip] = QPointF(xi, yi)
ip += 2
painter.drawPolyline(polygon)
if self.__data.brush.style() != Qt.NoBrush:
self.fillCurve(painter, xMap, yMap, canvasRect, polygon)
def setCurveAttribute(self, attribute, on=True):
"""
Specify an attribute for drawing the curve
Supported curve attributes:
* `QwtPlotCurve.Inverted`
:param int attribute: Curve attribute
:param bool on: On/Off
.. seealso::
:py:meth:`testCurveAttribute()`
"""
if (self.__data.attributes & attribute) == on:
return
if on:
self.__data.attributes |= attribute
else:
self.__data.attributes &= ~attribute
self.itemChanged()
def testCurveAttribute(self, attribute):
"""
:return: True, if attribute is enabled
.. seealso::
:py:meth:`setCurveAttribute()`
"""
return self.__data.attributes & attribute
def fillCurve(self, painter, xMap, yMap, canvasRect, polygon):
"""
Fill the area between the curve and the baseline with
the curve brush
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param QPolygonF polygon: Polygon - will be modified !
.. seealso::
:py:meth:`setBrush()`, :py:meth:`setBaseline()`,
:py:meth:`setStyle()`
"""
if self.__data.brush.style() == Qt.NoBrush:
return
self.closePolyline(painter, xMap, yMap, polygon)
if polygon.count() <= 2:
return
brush = self.__data.brush
if not brush.color().isValid():
brush.setColor(self.__data.pen.color())
painter.save()
painter.setPen(Qt.NoPen)
painter.setBrush(brush)
painter.drawPolygon(polygon)
painter.restore()
def closePolyline(self, painter, xMap, yMap, polygon):
"""
Complete a polygon to be a closed polygon including the
area between the original polygon and the baseline.
:param QPainter painter: Painter
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QPolygonF polygon: Polygon to be completed
"""
if polygon.size() < 2:
return
baseline = self.__data.baseline
if self.orientation() == Qt.Horizontal:
if yMap.transformation():
baseline = yMap.transformation().bounded(baseline)
refY = yMap.transform(baseline)
polygon += QPointF(polygon.last().x(), refY)
polygon += QPointF(polygon.first().x(), refY)
else:
if xMap.transformation():
baseline = xMap.transformation().bounded(baseline)
refX = xMap.transform(baseline)
polygon += QPointF(refX, polygon.last().y())
polygon += QPointF(refX, polygon.first().y())
def drawSymbols(self, painter, symbol, xMap, yMap, canvasRect, from_, to):
"""
Draw symbols
:param QPainter painter: Painter
:param qwt.symbol.QwtSymbol symbol: Curve symbol
:param qwt.scale_map.QwtScaleMap xMap: Maps x-values into pixel coordinates.
:param qwt.scale_map.QwtScaleMap yMap: Maps y-values into pixel coordinates.
:param QRectF canvasRect: Contents rectangle of the canvas
:param int from_: Index of the first point to be painted
:param int to: Index of the last point to be painted. If to < 0 the curve will be painted to its last point.
.. seealso::
:py:meth:`setSymbol()`, :py:meth:`drawSeries()`,
:py:meth:`drawCurve()`
"""
chunkSize = 500
for i in range(from_, to+1, chunkSize):
n = min([chunkSize, to-i+1])
points = series_to_polyline(xMap, yMap, self.data(), i, i+n-1)
if points.size() > 0:
symbol.drawSymbols(painter, points)
def setBaseline(self, value):
"""
Set the value of the baseline
The baseline is needed for filling the curve with a brush or
the Sticks drawing style.
The interpretation of the baseline depends on the `orientation()`.
With `Qt.Horizontal`, the baseline is interpreted as a horizontal line
at y = baseline(), with `Qt.Vertical`, it is interpreted as a vertical
line at x = baseline().
The default value is 0.0.
:param float value: Value of the baseline
.. seealso::
:py:meth:`baseline()`, :py:meth:`setBrush()`,
:py:meth:`setStyle()`
"""
if self.__data.baseline != value:
self.__data.baseline = value
self.itemChanged()
def baseline(self):
"""
:return: Value of the baseline
.. seealso::
:py:meth:`setBaseline()`
"""
return self.__data.baseline
def closestPoint(self, pos):
"""
Find the closest curve point for a specific position
:param QPoint pos: Position, where to look for the closest curve point
:return: tuple `(index, dist)`
`dist` is the distance between the position and the closest curve
point. `index` is the index of the closest curve point, or -1 if
none can be found ( f.e when the curve has no points ).
.. note::
`closestPoint()` implements a dumb algorithm, that iterates
over all points
"""
numSamples = self.dataSize()
if self.plot() is None or numSamples <= 0:
return -1
series = self.data()
xMap = self.plot().canvasMap(self.xAxis())
yMap = self.plot().canvasMap(self.yAxis())
index = -1
dmin = 1.0e10
for i in range(numSamples):
sample = series.sample(i)
cx = xMap.transform(sample.x())-pos.x()
cy = yMap.transform(sample.y())-pos.y()
f = qwtSqr(cx)+qwtSqr(cy)
if f < dmin:
index = i
dmin = f
dist = np.sqrt(dmin)
return index, dist
def legendIcon(self, index, size):
"""
:param int index: Index of the legend entry (ignored as there is only one)
:param QSizeF size: Icon size
:return: Icon representing the curve on the legend
.. seealso::
:py:meth:`qwt.plot.QwtPlotItem.setLegendIconSize()`,
:py:meth:`qwt.plot.QwtPlotItem.legendData()`
"""
if size.isEmpty():
return QwtGraphic()
graphic = QwtGraphic()
graphic.setDefaultSize(size)
graphic.setRenderHint(QwtGraphic.RenderPensUnscaled, True)
painter = QPainter(graphic)
painter.setRenderHint(QPainter.Antialiasing,
self.testRenderHint(QwtPlotItem.RenderAntialiased))
if self.__data.legendAttributes == 0 or\
(self.__data.legendAttributes & QwtPlotCurve.LegendShowBrush):
brush = self.__data.brush
if brush.style() == Qt.NoBrush and self.__data.legendAttributes == 0:
if self.style() != QwtPlotCurve.NoCurve:
brush = QBrush(self.pen().color())
elif self.__data.symbol and\
self.__data.symbol.style() != QwtSymbol.NoSymbol:
brush = QBrush(self.__data.symbol.pen().color())
if brush.style() != Qt.NoBrush:
r = QRectF(0, 0, size.width(), size.height())
painter.fillRect(r, brush)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowLine:
if self.pen() != Qt.NoPen:
pn = self.pen()
# pn.setCapStyle(Qt.FlatCap)
painter.setPen(pn)
y = .5*size.height()
painter.drawLine(0., y, size.width(), y)
if self.__data.legendAttributes & QwtPlotCurve.LegendShowSymbol:
if self.__data.symbol:
r = QRectF(0, 0, size.width(), size.height())
self.__data.symbol.drawSymbol(painter, r)
return graphic
def setData(self, *args, **kwargs):
"""
Initialize data with a series data object or an array of points.
.. py:method:: setData(data):
:param data: Series data (e.g. `QwtPointArrayData` instance)
:type data: qwt.plot_series.QwtSeriesData
.. py:method:: setData(xData, yData, [size=None], [finite=True]):
Initialize data with `x` and `y` arrays.
This signature was removed in Qwt6 and is temporarily maintained here to ensure compatibility with Qwt5.
Same as `setSamples(x, y, [size=None], [finite=True])`
:param x: List/array of x values
:param y: List/array of y values
:param size: size of xData and yData
:type size: int or None
:param bool finite: if True, keep only finite array elements (remove all infinity and not a number values), otherwise do not filter array elements
.. seealso::
:py:meth:`setSamples()`
"""
if len(args) == 1 and not kwargs:
super(QwtPlotCurve, self).setData(*args)
elif len(args) in (2, 3, 4):
self.setSamples(*args, **kwargs)
else:
raise TypeError("%s().setData() takes 1, 2, 3 or 4 argument(s) (%s given)"\
% (self.__class__.__name__, len(args)))
def setSamples(self, *args, **kwargs):
"""
Initialize data with an array of points.
.. py:method:: setSamples(data):
:param data: Series data (e.g. `QwtPointArrayData` instance)
:type data: qwt.plot_series.QwtSeriesData
.. py:method:: setSamples(samples):
Same as `setData(QwtPointArrayData(samples))`
:param samples: List/array of points
.. py:method:: setSamples(xData, yData, [size=None], [finite=True]):
Same as `setData(QwtPointArrayData(xData, yData, [size=None]))`
:param xData: List/array of x values
:param yData: List/array of y values
:param size: size of xData and yData
:type size: int or None
:param bool finite: if True, keep only finite array elements (remove all infinity and not a number values), otherwise do not filter array elements
.. seealso::
:py:class:`qwt.plot_series.QwtPointArrayData`
"""
if len(args) == 1 and not kwargs:
samples, = args
if isinstance(samples, QwtSeriesData):
self.setData(samples)
else:
self.setData(QwtPointArrayData(samples))
elif len(args) >= 2:
xData, yData = args[:2]
try:
size = kwargs.pop('size')
except KeyError:
size = None
try:
finite = kwargs.pop('finite')
except KeyError:
finite = None
if kwargs:
raise TypeError("%s().setSamples(): unknown %s keyword "\
"argument(s)"\
% (self.__class__.__name__,
", ".join(list(kwargs.keys()))))
for arg in args[2:]:
if isinstance(arg, bool):
finite = arg
elif isinstance(arg, int):
size = arg
self.setData(QwtPointArrayData(xData, yData,
size=size, finite=finite))
else:
raise TypeError("%s().setSamples() takes 1, 2 or 3 argument(s) "\
"(%s given)" % (self.__class__.__name__, len(args)))
