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pyqtgraph/PlotItem.py
Luke Campagnola 2ca08c69ce merged many changes in from acq4: 
- added vertical lines / regions for plots
 - added gradient editor widget
 - many bugfixes
 - cleaned up imageview a bit
2010-07-24 14:29:09 -04:00

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# -*- coding: utf-8 -*-
"""
PlotItem.py - Graphics item implementing a scalable ViewBox with plotting powers.
Copyright 2010 Luke Campagnola
Distributed under MIT/X11 license. See license.txt for more infomation.
This class is one of the workhorses of pyqtgraph. It implements a graphics item with
plots, labels, and scales which can be viewed inside a QGraphicsScene. If you want
a widget that can be added to your GUI, see PlotWidget instead.
This class is very heavily featured:
- Automatically creates and manages PlotCurveItems
- Fast display and update of plots
- Manages zoom/pan ViewBox, scale, and label elements
- Automatic scaling when data changes
- Control panel with a huge feature set including averaging, decimation,
display, power spectrum, svg/png export, plot linking, and more.
"""
from graphicsItems import *
from plotConfigTemplate import *
from PyQt4 import QtGui, QtCore, QtSvg
#from ObjectWorkaround import *
#tryWorkaround(QtCore, QtGui)
import weakref
try:
from WidgetGroup import *
HAVE_WIDGETGROUP = True
except:
HAVE_WIDGETGROUP = False
try:
from metaarray import *
HAVE_METAARRAY = True
except:
HAVE_METAARRAY = False
class PlotItem(QtGui.QGraphicsWidget):
"""Plot graphics item that can be added to any graphics scene. Implements axis titles, scales, interactive viewbox."""
lastFileDir = None
managers = {}
def __init__(self, parent=None, name=None):
QtGui.QGraphicsWidget.__init__(self, parent)
## Set up control buttons
self.ctrlBtn = QtGui.QToolButton()
self.ctrlBtn.setText('?')
self.autoBtn = QtGui.QToolButton()
self.autoBtn.setText('A')
self.autoBtn.hide()
for b in [self.ctrlBtn, self.autoBtn]:
proxy = QtGui.QGraphicsProxyWidget(self)
proxy.setWidget(b)
proxy.setAcceptHoverEvents(False)
b.setStyleSheet("background-color: #000000; color: #888; font-size: 6pt")
QtCore.QObject.connect(self.ctrlBtn, QtCore.SIGNAL('clicked()'), self.ctrlBtnClicked)
QtCore.QObject.connect(self.autoBtn, QtCore.SIGNAL('clicked()'), self.enableAutoScale)
self.layout = QtGui.QGraphicsGridLayout()
self.layout.setContentsMargins(1,1,1,1)
self.setLayout(self.layout)
self.layout.setHorizontalSpacing(0)
self.layout.setVerticalSpacing(0)
self.vb = ViewBox()
QtCore.QObject.connect(self.vb, QtCore.SIGNAL('xRangeChanged'), self.xRangeChanged)
QtCore.QObject.connect(self.vb, QtCore.SIGNAL('yRangeChanged'), self.yRangeChanged)
QtCore.QObject.connect(self.vb, QtCore.SIGNAL('rangeChangedManually'), self.enableManualScale)
QtCore.QObject.connect(self.vb, QtCore.SIGNAL('viewChanged'), self.viewChanged)
self.layout.addItem(self.vb, 2, 1)
self.alpha = 1.0
self.autoAlpha = True
self.spectrumMode = False
self.autoScale = [True, True]
## Create and place scale items
self.scales = {
'top': {'item': ScaleItem(orientation='top', linkView=self.vb), 'pos': (1, 1)},
'bottom': {'item': ScaleItem(orientation='bottom', linkView=self.vb), 'pos': (3, 1)},
'left': {'item': ScaleItem(orientation='left', linkView=self.vb), 'pos': (2, 0)},
'right': {'item': ScaleItem(orientation='right', linkView=self.vb), 'pos': (2, 2)}
}
for k in self.scales:
self.layout.addItem(self.scales[k]['item'], *self.scales[k]['pos'])
## Create and place label items
#self.labels = {
#'title': {'item': LabelItem('title', size='11pt'), 'pos': (0, 2), 'text': ''},
#'top': {'item': LabelItem('top'), 'pos': (1, 2), 'text': '', 'units': '', 'unitPrefix': ''},
#'bottom': {'item': LabelItem('bottom'), 'pos': (5, 2), 'text': '', 'units': '', 'unitPrefix': ''},
#'left': {'item': LabelItem('left'), 'pos': (3, 0), 'text': '', 'units': '', 'unitPrefix': ''},
#'right': {'item': LabelItem('right'), 'pos': (3, 4), 'text': '', 'units': '', 'unitPrefix': ''}
#}
#self.labels['left']['item'].setAngle(-90)
#self.labels['right']['item'].setAngle(-90)
#for k in self.labels:
#self.layout.addItem(self.labels[k]['item'], *self.labels[k]['pos'])
self.titleLabel = LabelItem('', size='11pt')
self.layout.addItem(self.titleLabel, 0, 1)
self.setTitle(None) ## hide
for i in range(4):
self.layout.setRowPreferredHeight(i, 0)
self.layout.setRowMinimumHeight(i, 0)
self.layout.setRowSpacing(i, 0)
self.layout.setRowStretchFactor(i, 1)
for i in range(3):
self.layout.setColumnPreferredWidth(i, 0)
self.layout.setColumnMinimumWidth(i, 0)
self.layout.setColumnSpacing(i, 0)
self.layout.setColumnStretchFactor(i, 1)
self.layout.setRowStretchFactor(2, 100)
self.layout.setColumnStretchFactor(1, 100)
## Wrap a few methods from viewBox
for m in ['setXRange', 'setYRange', 'setRange', 'autoRange', 'viewRect', 'setMouseEnabled']:
setattr(self, m, getattr(self.vb, m))
self.items = []
self.curves = []
self.paramList = {}
self.avgCurves = {}
### Set up context menu
w = QtGui.QWidget()
self.ctrl = c = Ui_Form()
c.setupUi(w)
dv = QtGui.QDoubleValidator(self)
self.ctrlMenu = QtGui.QMenu()
ac = QtGui.QWidgetAction(self)
ac.setDefaultWidget(w)
self.ctrlMenu.addAction(ac)
if HAVE_WIDGETGROUP:
self.stateGroup = WidgetGroup(self.ctrlMenu)
self.fileDialog = None
self.xLinkPlot = None
self.yLinkPlot = None
self.linksBlocked = False
#self.ctrlBtn.setFixedWidth(60)
self.setAcceptHoverEvents(True)
## Connect control widgets
QtCore.QObject.connect(c.xMinText, QtCore.SIGNAL('editingFinished()'), self.setManualXScale)
QtCore.QObject.connect(c.xMaxText, QtCore.SIGNAL('editingFinished()'), self.setManualXScale)
QtCore.QObject.connect(c.yMinText, QtCore.SIGNAL('editingFinished()'), self.setManualYScale)
QtCore.QObject.connect(c.yMaxText, QtCore.SIGNAL('editingFinished()'), self.setManualYScale)
QtCore.QObject.connect(c.xManualRadio, QtCore.SIGNAL('clicked()'), self.updateXScale)
QtCore.QObject.connect(c.yManualRadio, QtCore.SIGNAL('clicked()'), self.updateYScale)
QtCore.QObject.connect(c.xAutoRadio, QtCore.SIGNAL('clicked()'), self.updateXScale)
QtCore.QObject.connect(c.yAutoRadio, QtCore.SIGNAL('clicked()'), self.updateYScale)
QtCore.QObject.connect(c.xAutoPercentSpin, QtCore.SIGNAL('valueChanged(int)'), self.replot)
QtCore.QObject.connect(c.yAutoPercentSpin, QtCore.SIGNAL('valueChanged(int)'), self.replot)
#QtCore.QObject.connect(c.xLogCheck, QtCore.SIGNAL('toggled(bool)'), self.setXLog)
#QtCore.QObject.connect(c.yLogCheck, QtCore.SIGNAL('toggled(bool)'), self.setYLog)
QtCore.QObject.connect(c.alphaGroup, QtCore.SIGNAL('toggled(bool)'), self.updateAlpha)
QtCore.QObject.connect(c.alphaSlider, QtCore.SIGNAL('valueChanged(int)'), self.updateAlpha)
QtCore.QObject.connect(c.autoAlphaCheck, QtCore.SIGNAL('toggled(bool)'), self.updateAlpha)
QtCore.QObject.connect(c.gridGroup, QtCore.SIGNAL('toggled(bool)'), self.updateGrid)
QtCore.QObject.connect(c.gridAlphaSlider, QtCore.SIGNAL('valueChanged(int)'), self.updateGrid)
QtCore.QObject.connect(c.powerSpectrumGroup, QtCore.SIGNAL('toggled(bool)'), self.updateSpectrumMode)
QtCore.QObject.connect(c.saveSvgBtn, QtCore.SIGNAL('clicked()'), self.saveSvgClicked)
QtCore.QObject.connect(c.saveImgBtn, QtCore.SIGNAL('clicked()'), self.saveImgClicked)
QtCore.QObject.connect(c.saveCsvBtn, QtCore.SIGNAL('clicked()'), self.saveCsvClicked)
#QtCore.QObject.connect(c.gridGroup, QtCore.SIGNAL('toggled(bool)'), self.updateGrid)
#QtCore.QObject.connect(c.gridAlphaSlider, QtCore.SIGNAL('valueChanged(int)'), self.updateGrid)
QtCore.QObject.connect(self.ctrl.xLinkCombo, QtCore.SIGNAL('currentIndexChanged(int)'), self.xLinkComboChanged)
QtCore.QObject.connect(self.ctrl.yLinkCombo, QtCore.SIGNAL('currentIndexChanged(int)'), self.yLinkComboChanged)
QtCore.QObject.connect(c.downsampleSpin, QtCore.SIGNAL('valueChanged(int)'), self.updateDownsampling)
QtCore.QObject.connect(self.ctrl.avgParamList, QtCore.SIGNAL('itemClicked(QListWidgetItem*)'), self.avgParamListClicked)
QtCore.QObject.connect(self.ctrl.averageGroup, QtCore.SIGNAL('toggled(bool)'), self.avgToggled)
#QtCore.QObject.connect(self.ctrl.pointsGroup, QtCore.SIGNAL('toggled(bool)'), self.updatePointMode)
#QtCore.QObject.connect(self.ctrl.autoPointsCheck, QtCore.SIGNAL('toggled(bool)'), self.updatePointMode)
QtCore.QObject.connect(self.ctrl.maxTracesCheck, QtCore.SIGNAL('toggled(bool)'), self.updateDecimation)
QtCore.QObject.connect(self.ctrl.maxTracesSpin, QtCore.SIGNAL('valueChanged(int)'), self.updateDecimation)
QtCore.QObject.connect(c.xMouseCheck, QtCore.SIGNAL('toggled(bool)'), self.mouseCheckChanged)
QtCore.QObject.connect(c.yMouseCheck, QtCore.SIGNAL('toggled(bool)'), self.mouseCheckChanged)
self.xLinkPlot = None
self.yLinkPlot = None
self.linksBlocked = False
self.manager = None
#self.showLabel('right', False)
#self.showLabel('top', False)
#self.showLabel('title', False)
#self.showLabel('left', False)
#self.showLabel('bottom', False)
self.showScale('right', False)
self.showScale('top', False)
self.showScale('left', True)
self.showScale('bottom', True)
if name is not None:
self.registerPlot(name)
def __del__(self):
if self.manager is not None:
self.manager.removeWidget(self.name)
def registerPlot(self, name):
self.name = name
win = str(self.window())
#print "register", name, win
if win not in PlotItem.managers:
PlotItem.managers[win] = PlotWidgetManager()
self.manager = PlotItem.managers[win]
self.manager.addWidget(self, name)
QtCore.QObject.connect(self.manager, QtCore.SIGNAL('widgetListChanged'), self.updatePlotList)
self.updatePlotList()
def updatePlotList(self):
"""Update the list of all plotWidgets in the "link" combos"""
#print "update plot list", self
try:
for sc in [self.ctrl.xLinkCombo, self.ctrl.yLinkCombo]:
current = str(sc.currentText())
sc.clear()
sc.addItem("")
if self.manager is not None:
for w in self.manager.listWidgets():
#print w
if w == self.name:
continue
sc.addItem(w)
except:
import gc
refs= gc.get_referrers(self)
print " error during update. Referrers are:", refs
raise
def updateGrid(self, *args):
g = self.ctrl.gridGroup.isChecked()
if g:
g = self.ctrl.gridAlphaSlider.value()
for k in self.scales:
self.scales[k]['item'].setGrid(g)
def viewGeometry(self):
"""return the screen geometry of the viewbox"""
v = self.scene().views()[0]
b = self.vb.mapRectToScene(self.vb.boundingRect())
wr = v.mapFromScene(b).boundingRect()
pos = v.pos()
wr.adjust(v.x(), v.y(), v.x(), v.y())
return wr
def viewChanged(self, *args):
self.emit(QtCore.SIGNAL('viewChanged'), *args)
def blockLink(self, b):
self.linksBlocked = b
def xLinkComboChanged(self):
self.setXLink(str(self.ctrl.xLinkCombo.currentText()))
def yLinkComboChanged(self):
self.setYLink(str(self.ctrl.yLinkCombo.currentText()))
def setXLink(self, plot=None):
"""Link this plot's X axis to another plot (pass either the PlotItem/PlotWidget or the registered name of the plot)"""
if isinstance(plot, basestring):
if self.manager is None:
return
if self.xLinkPlot is not None:
self.manager.unlinkX(self, self.xLinkPlot)
plot = self.manager.getWidget(plot)
if not isinstance(plot, PlotItem) and hasattr(plot, 'getPlotItem'):
plot = plot.getPlotItem()
self.xLinkPlot = plot
if plot is not None:
self.setManualXScale()
self.manager.linkX(self, plot)
def setYLink(self, plot=None):
"""Link this plot's Y axis to another plot (pass either the PlotItem/PlotWidget or the registered name of the plot)"""
if isinstance(plot, basestring):
if self.manager is None:
return
if self.yLinkPlot is not None:
self.manager.unlinkY(self, self.yLinkPlot)
plot = self.manager.getWidget(plot)
if not isinstance(plot, PlotItem) and hasattr(plot, 'getPlotItem'):
plot = plot.getPlotItem()
self.yLinkPlot = plot
if plot is not None:
self.setManualYScale()
self.manager.linkY(self, plot)
def linkXChanged(self, plot):
#print "update from", plot
if self.linksBlocked:
return
pr = plot.vb.viewRect()
pg = plot.viewGeometry()
if pg is None:
#print " return early"
return
sg = self.viewGeometry()
upp = float(pr.width()) / pg.width()
x1 = pr.left() + (sg.x()-pg.x()) * upp
x2 = x1 + sg.width() * upp
plot.blockLink(True)
self.setXRange(x1, x2, padding=0)
plot.blockLink(False)
self.replot()
def linkYChanged(self, plot):
if self.linksBlocked:
return
pr = plot.vb.viewRect()
pg = plot.vb.boundingRect()
sg = self.vb.boundingRect()
upp = float(pr.height()) / pg.height()
y1 = pr.bottom() + (sg.y()-pg.y()) * upp
y2 = y1 + sg.height() * upp
plot.blockLink(True)
self.setYRange(y1, y2, padding=0)
plot.blockLink(False)
self.replot()
def avgToggled(self, b):
if b:
self.recomputeAverages()
for k in self.avgCurves:
self.avgCurves[k][1].setVisible(b)
def avgParamListClicked(self, item):
name = str(item.text())
self.paramList[name] = (item.checkState() == QtCore.Qt.Checked)
self.recomputeAverages()
def recomputeAverages(self):
if not self.ctrl.averageGroup.isChecked():
return
for k in self.avgCurves:
self.removeItem(self.avgCurves[k][1])
#Qwt.QwtPlotCurve.detach(self.avgCurves[k][1])
self.avgCurves = {}
for c in self.curves:
self.addAvgCurve(c)
self.replot()
def addAvgCurve(self, curve):
"""Add a single curve into the pool of curves averaged together"""
## If there are plot parameters, then we need to determine which to average together.
remKeys = []
addKeys = []
if self.ctrl.avgParamList.count() > 0:
### First determine the key of the curve to which this new data should be averaged
for i in range(self.ctrl.avgParamList.count()):
item = self.ctrl.avgParamList.item(i)
if item.checkState() == QtCore.Qt.Checked:
remKeys.append(str(item.text()))
else:
addKeys.append(str(item.text()))
if len(remKeys) < 1: ## In this case, there would be 1 average plot for each data plot; not useful.
return
p = curve.meta().copy()
for k in p:
if type(k) is tuple:
p['.'.join(k)] = p[k]
del p[k]
for rk in remKeys:
if rk in p:
del p[rk]
for ak in addKeys:
if ak not in p:
p[ak] = None
key = tuple(p.items())
### Create a new curve if needed
if key not in self.avgCurves:
plot = PlotCurveItem()
plot.setPen(mkPen([0, 200, 0]))
plot.setShadowPen(mkPen([0, 0, 0, 100], 3))
plot.setAlpha(1.0, False)
plot.setZValue(100)
self.addItem(plot)
#Qwt.QwtPlotCurve.attach(plot, self)
self.avgCurves[key] = [0, plot]
self.avgCurves[key][0] += 1
(n, plot) = self.avgCurves[key]
### Average data together
(x, y) = curve.getData()
if plot.yData is not None:
newData = plot.yData * (n-1) / float(n) + y * 1.0 / float(n)
plot.setData(plot.xData, newData)
else:
plot.setData(x, y)
def mouseCheckChanged(self):
state = [self.ctrl.xMouseCheck.isChecked(), self.ctrl.yMouseCheck.isChecked()]
self.vb.setMouseEnabled(*state)
def xRangeChanged(self, _, range):
if any(isnan(range)) or any(isinf(range)):
raise Exception("yRange invalid: %s. Signal came from %s" % (str(range), str(self.sender())))
self.ctrl.xMinText.setText('%0.5g' % range[0])
self.ctrl.xMaxText.setText('%0.5g' % range[1])
## automatically change unit scale
maxVal = max(abs(range[0]), abs(range[1]))
(scale, prefix) = siScale(maxVal)
#for l in ['top', 'bottom']:
#if self.getLabel(l).isVisible():
#self.setLabel(l, unitPrefix=prefix)
#self.getScale(l).setScale(scale)
#else:
#self.setLabel(l, unitPrefix='')
#self.getScale(l).setScale(1.0)
self.emit(QtCore.SIGNAL('xRangeChanged'), self, range)
def yRangeChanged(self, _, range):
if any(isnan(range)) or any(isinf(range)):
raise Exception("yRange invalid: %s. Signal came from %s" % (str(range), str(self.sender())))
self.ctrl.yMinText.setText('%0.5g' % range[0])
self.ctrl.yMaxText.setText('%0.5g' % range[1])
## automatically change unit scale
maxVal = max(abs(range[0]), abs(range[1]))
(scale, prefix) = siScale(maxVal)
#for l in ['left', 'right']:
#if self.getLabel(l).isVisible():
#self.setLabel(l, unitPrefix=prefix)
#self.getScale(l).setScale(scale)
#else:
#self.setLabel(l, unitPrefix='')
#self.getScale(l).setScale(1.0)
self.emit(QtCore.SIGNAL('yRangeChanged'), self, range)
def enableAutoScale(self):
self.ctrl.xAutoRadio.setChecked(True)
self.ctrl.yAutoRadio.setChecked(True)
self.autoBtn.hide()
self.updateXScale()
self.updateYScale()
self.replot()
def updateXScale(self):
"""Set plot to autoscale or not depending on state of radio buttons"""
if self.ctrl.xManualRadio.isChecked():
self.setManualXScale()
else:
self.setAutoXScale()
self.replot()
def updateYScale(self, b=False):
"""Set plot to autoscale or not depending on state of radio buttons"""
if self.ctrl.yManualRadio.isChecked():
self.setManualYScale()
else:
self.setAutoYScale()
self.replot()
def enableManualScale(self, v=[True, True]):
if v[0]:
self.autoScale[0] = False
self.ctrl.xManualRadio.setChecked(True)
#self.setManualXScale()
if v[1]:
self.autoScale[1] = False
self.ctrl.yManualRadio.setChecked(True)
#self.setManualYScale()
self.autoBtn.show()
#self.replot()
def setManualXScale(self):
self.autoScale[0] = False
x1 = float(self.ctrl.xMinText.text())
x2 = float(self.ctrl.xMaxText.text())
self.ctrl.xManualRadio.setChecked(True)
self.setXRange(x1, x2, padding=0)
self.autoBtn.show()
#self.replot()
def setManualYScale(self):
self.autoScale[1] = False
y1 = float(self.ctrl.yMinText.text())
y2 = float(self.ctrl.yMaxText.text())
self.ctrl.yManualRadio.setChecked(True)
self.setYRange(y1, y2, padding=0)
self.autoBtn.show()
#self.replot()
def setAutoXScale(self):
self.autoScale[0] = True
self.ctrl.xAutoRadio.setChecked(True)
#self.replot()
def setAutoYScale(self):
self.autoScale[1] = True
self.ctrl.yAutoRadio.setChecked(True)
#self.replot()
def addItem(self, item, *args):
self.items.append(item)
self.vb.addItem(item, *args)
def removeItem(self, item):
if not item in self.items:
return
self.items.remove(item)
if item.scene() is not None:
self.vb.removeItem(item)
if item in self.curves:
self.curves.remove(item)
self.updateDecimation()
self.updateParamList()
item.connect(QtCore.SIGNAL('plotChanged'), self.plotChanged)
def clear(self):
for i in self.items[:]:
self.removeItem(i)
self.avgCurves = {}
def clearPlots(self):
for i in self.curves[:]:
self.removeItem(i)
self.avgCurves = {}
def plot(self, data=None, x=None, clear=False, params=None, pen=None):
if clear:
self.clear()
if params is None:
params = {}
if HAVE_METAARRAY and isinstance(data, MetaArray):
curve = self._plotMetaArray(data, x=x)
elif isinstance(data, ndarray):
curve = self._plotArray(data, x=x)
elif isinstance(data, list):
if x is not None:
x = array(x)
curve = self._plotArray(array(data), x=x)
elif data is None:
curve = PlotCurveItem()
else:
raise Exception('Not sure how to plot object of type %s' % type(data))
#print data, curve
self.addCurve(curve, params)
if pen is not None:
curve.setPen(pen)
return curve
def addCurve(self, c, params=None):
if params is None:
params = {}
c.setMeta(params)
self.curves.append(c)
#Qwt.QwtPlotCurve.attach(c, self)
self.addItem(c)
## configure curve for this plot
(alpha, auto) = self.alphaState()
c.setAlpha(alpha, auto)
c.setSpectrumMode(self.ctrl.powerSpectrumGroup.isChecked())
c.setDownsampling(self.downsampleMode())
c.setPointMode(self.pointMode())
## Hide older plots if needed
self.updateDecimation()
## Add to average if needed
self.updateParamList()
if self.ctrl.averageGroup.isChecked():
self.addAvgCurve(c)
c.connect(QtCore.SIGNAL('plotChanged'), self.plotChanged)
self.plotChanged()
def plotChanged(self, curve=None):
## Recompute auto range if needed
for ax in [0, 1]:
if self.autoScale[ax]:
percentScale = [self.ctrl.xAutoPercentSpin.value(), self.ctrl.yAutoPercentSpin.value()][ax] * 0.01
mn = None
mx = None
for c in self.curves + [c[1] for c in self.avgCurves.values()]:
if not c.isVisible():
continue
cmn, cmx = c.getRange(ax, percentScale)
if mn is None or cmn < mn:
mn = cmn
if mx is None or cmx > mx:
mx = cmx
if mn is None or mx is None or any(isnan([mn, mx])) or any(isinf([mn, mx])):
continue
if mn == mx:
mn -= 1
mx += 1
self.setRange(ax, mn, mx)
def replot(self):
self.plotChanged()
self.update()
def updateParamList(self):
self.ctrl.avgParamList.clear()
## Check to see that each parameter for each curve is present in the list
#print "\nUpdate param list", self
#print "paramList:", self.paramList
for c in self.curves:
#print " curve:", c
for p in c.meta().keys():
#print " param:", p
if type(p) is tuple:
p = '.'.join(p)
## If the parameter is not in the list, add it.
matches = self.ctrl.avgParamList.findItems(p, QtCore.Qt.MatchExactly)
#print " matches:", matches
if len(matches) == 0:
i = QtGui.QListWidgetItem(p)
if p in self.paramList and self.paramList[p] is True:
#print " set checked"
i.setCheckState(QtCore.Qt.Checked)
else:
#print " set unchecked"
i.setCheckState(QtCore.Qt.Unchecked)
self.ctrl.avgParamList.addItem(i)
else:
i = matches[0]
self.paramList[p] = (i.checkState() == QtCore.Qt.Checked)
#print "paramList:", self.paramList
def writeSvg(self, fileName=None):
if fileName is None:
fileName = QtGui.QFileDialog.getSaveFileName()
fileName = str(fileName)
PlotItem.lastFileDir = os.path.dirname(fileName)
self.svg = QtSvg.QSvgGenerator()
self.svg.setFileName(fileName)
res = 120.
#bounds = self.mapRectToScene(self.boundingRect())
view = self.scene().views()[0]
bounds = view.viewport().rect()
bounds = QtCore.QRectF(0, 0, bounds.width(), bounds.height())
self.svg.setResolution(res)
#self.svg.setSize(QtCore.QSize(self.size().width(), self.size().height()))
self.svg.setViewBox(bounds)
self.svg.setSize(QtCore.QSize(bounds.width(), bounds.height()))
painter = QtGui.QPainter(self.svg)
#self.scene().render(painter, QtCore.QRectF(), view.mapToScene(bounds).boundingRect())
#items = self.scene().items()
#self.scene().views()[0].drawItems(painter, len(items), items)
#print view, type(view)
view.render(painter, bounds)
painter.end()
## Workaround to set pen widths correctly
import re
data = open(fileName).readlines()
for i in range(len(data)):
line = data[i]
m = re.match(r'(<g .*)stroke-width="1"(.*transform="matrix\(([^\)]+)\)".*)', line)
if m is not None:
#print "Matched group:", line
g = m.groups()
matrix = map(float, g[2].split(','))
#print "matrix:", matrix
scale = max(abs(matrix[0]), abs(matrix[3]))
if scale == 0 or scale == 1.0:
continue
data[i] = g[0] + ' stroke-width="%0.2g" ' % (1.0/scale) + g[1] + '\n'
#print "old line:", line
#print "new line:", data[i]
open(fileName, 'w').write(''.join(data))
def writeImage(self, fileName=None):
if fileName is None:
fileName = QtGui.QFileDialog.getSaveFileName()
fileName = str(fileName)
PlotItem.lastFileDir = os.path.dirname(fileName)
self.png = QtGui.QImage(int(self.size().width()), int(self.size().height()), QtGui.QImage.Format_ARGB32)
painter = QtGui.QPainter(self.png)
painter.setRenderHints(painter.Antialiasing | painter.TextAntialiasing)
self.scene().render(painter, QtCore.QRectF(), self.mapRectToScene(self.boundingRect()))
painter.end()
self.png.save(fileName)
def writeCsv(self, fileName=None):
if fileName is None:
fileName = QtGui.QFileDialog.getSaveFileName()
fileName = str(fileName)
PlotItem.lastFileDir = os.path.dirname(fileName)
fd = open(fileName, 'w')
data = [c.getData() for c in self.curves]
i = 0
while True:
done = True
for d in data:
if i < len(d[0]):
fd.write('%g,%g,'%(d[0][i], d[1][i]))
done = False
else:
fd.write(' , ,')
fd.write('\n')
if done:
break
i += 1
fd.close()
def saveState(self):
if not HAVE_WIDGETGROUP:
raise Exception("State save/restore requires WidgetGroup class.")
state = self.stateGroup.state()
state['paramList'] = self.paramList.copy()
#print "\nSAVE %s:\n" % str(self.name), state
#print "Saving state. averageGroup.isChecked(): %s state: %s" % (str(self.ctrl.averageGroup.isChecked()), str(state['averageGroup']))
return state
def restoreState(self, state):
if not HAVE_WIDGETGROUP:
raise Exception("State save/restore requires WidgetGroup class.")
if 'paramList' in state:
self.paramList = state['paramList'].copy()
self.stateGroup.setState(state)
self.updateSpectrumMode()
self.updateDownsampling()
self.updateAlpha()
self.updateDecimation()
self.stateGroup.setState(state)
self.updateXScale()
self.updateYScale()
self.updateParamList()
#print "\nRESTORE %s:\n" % str(self.name), state
#print "Restoring state. averageGroup.isChecked(): %s state: %s" % (str(self.ctrl.averageGroup.isChecked()), str(state['averageGroup']))
#avg = self.ctrl.averageGroup.isChecked()
#if avg != state['averageGroup']:
#print " WARNING: avgGroup is %s, should be %s" % (str(avg), str(state['averageGroup']))
def widgetGroupInterface(self):
return (None, PlotItem.saveState, PlotItem.restoreState)
def updateSpectrumMode(self, b=None):
if b is None:
b = self.ctrl.powerSpectrumGroup.isChecked()
for c in self.curves:
c.setSpectrumMode(b)
self.enableAutoScale()
self.recomputeAverages()
def updateDownsampling(self):
ds = self.downsampleMode()
for c in self.curves:
c.setDownsampling(ds)
self.recomputeAverages()
#for c in self.avgCurves.values():
#c[1].setDownsampling(ds)
def downsampleMode(self):
if self.ctrl.decimateGroup.isChecked():
if self.ctrl.manualDecimateRadio.isChecked():
ds = self.ctrl.downsampleSpin.value()
else:
ds = True
else:
ds = False
return ds
def updateDecimation(self):
if self.ctrl.maxTracesCheck.isChecked():
numCurves = self.ctrl.maxTracesSpin.value()
else:
numCurves = -1
curves = self.curves[:]
split = len(curves) - numCurves
for i in range(len(curves)):
if numCurves == -1 or i >= split:
curves[i].show()
else:
if self.ctrl.forgetTracesCheck.isChecked():
curves[i].free()
self.removeItem(curves[i])
else:
curves[i].hide()
def updateAlpha(self, *args):
(alpha, auto) = self.alphaState()
for c in self.curves:
c.setAlpha(alpha**2, auto)
#self.replot(autoRange=False)
def alphaState(self):
enabled = self.ctrl.alphaGroup.isChecked()
auto = self.ctrl.autoAlphaCheck.isChecked()
alpha = float(self.ctrl.alphaSlider.value()) / self.ctrl.alphaSlider.maximum()
if auto:
alpha = 1.0 ## should be 1/number of overlapping plots
if not enabled:
auto = False
alpha = 1.0
return (alpha, auto)
def pointMode(self):
if self.ctrl.pointsGroup.isChecked():
if self.ctrl.autoPointsCheck.isChecked():
mode = None
else:
mode = True
else:
mode = False
return mode
#def mousePressEvent(self, ev):
#self.mousePos = array([ev.pos().x(), ev.pos().y()])
#self.pressPos = self.mousePos.copy()
#QtGui.QGraphicsWidget.mousePressEvent(self, ev)
## NOTE: we will only receive move/release events if we run ev.accept()
#print 'press'
#def mouseReleaseEvent(self, ev):
#pos = array([ev.pos().x(), ev.pos().y()])
#print 'release'
#if sum(abs(self.pressPos - pos)) < 3: ## Detect click
#if ev.button() == QtCore.Qt.RightButton:
#print 'popup'
#self.ctrlMenu.popup(self.mapToGlobal(ev.pos()))
#self.mousePos = pos
#QtGui.QGraphicsWidget.mouseReleaseEvent(self, ev)
def resizeEvent(self, ev):
self.ctrlBtn.move(0, self.size().height() - self.ctrlBtn.size().height())
self.autoBtn.move(self.ctrlBtn.width(), self.size().height() - self.autoBtn.size().height())
def hoverMoveEvent(self, ev):
self.mousePos = ev.pos()
self.mouseScreenPos = ev.screenPos()
def ctrlBtnClicked(self):
self.ctrlMenu.popup(self.mouseScreenPos)
#def _checkLabelKey(self, key):
#if key not in self.labels:
#raise Exception("Label '%s' not found. Labels are: %s" % (key, str(self.labels.keys())))
def getLabel(self, key):
pass
#self._checkLabelKey(key)
#return self.labels[key]['item']
def _checkScaleKey(self, key):
if key not in self.scales:
raise Exception("Scale '%s' not found. Scales are: %s" % (key, str(self.scales.keys())))
def getScale(self, key):
self._checkScaleKey(key)
return self.scales[key]['item']
def setLabel(self, key, text=None, units=None, unitPrefix=None, **args):
self.getScale(key).setLabel(text=text, units=units, unitPrefix=unitPrefix, **args)
#if text is not None:
#self.labels[key]['text'] = text
#if units != None:
#self.labels[key]['units'] = units
#if unitPrefix != None:
#self.labels[key]['unitPrefix'] = unitPrefix
#text = self.labels[key]['text']
#units = self.labels[key]['units']
#unitPrefix = self.labels[key]['unitPrefix']
#if text is not '' or units is not '':
#l = self.getLabel(key)
#l.setText("%s (%s%s)" % (text, unitPrefix, units), **args)
#self.showLabel(key)
def showLabel(self, key, show=True):
self.getScale(key).showLabel(show)
#l = self.getLabel(key)
#p = self.labels[key]['pos']
#if show:
#l.show()
#if key in ['left', 'right']:
#self.layout.setColumnFixedWidth(p[1], l.size().width())
#l.setMaximumWidth(20)
#else:
#self.layout.setRowFixedHeight(p[0], l.size().height())
#l.setMaximumHeight(20)
#else:
#l.hide()
#if key in ['left', 'right']:
#self.layout.setColumnFixedWidth(p[1], 0)
#l.setMaximumWidth(0)
#else:
#self.layout.setRowFixedHeight(p[0], 0)
#l.setMaximumHeight(0)
def setTitle(self, title=None, **args):
if title is None:
self.titleLabel.setVisible(False)
self.layout.setRowFixedHeight(0, 0)
self.titleLabel.setMaximumHeight(0)
else:
self.titleLabel.setMaximumHeight(30)
self.layout.setRowFixedHeight(0, 30)
self.titleLabel.setVisible(True)
self.titleLabel.setText(title, **args)
def showScale(self, key, show=True):
s = self.getScale(key)
p = self.scales[key]['pos']
if show:
s.show()
#if key in ['left', 'right']:
#self.layout.setColumnFixedWidth(p[1], s.maximumWidth())
##s.setMaximumWidth(40)
#else:
#self.layout.setRowFixedHeight(p[0], s.maximumHeight())
#s.setMaximumHeight(20)
else:
s.hide()
#if key in ['left', 'right']:
#self.layout.setColumnFixedWidth(p[1], 0)
##s.setMaximumWidth(0)
#else:
#self.layout.setRowFixedHeight(p[0], 0)
#s.setMaximumHeight(0)
def _plotArray(self, arr, x=None):
if arr.ndim != 1:
raise Exception("Array must be 1D to plot (shape is %s)" % arr.shape)
if x is None:
x = arange(arr.shape[0])
if x.ndim != 1:
raise Exception("X array must be 1D to plot (shape is %s)" % x.shape)
c = PlotCurveItem(arr, x=x)
return c
def _plotMetaArray(self, arr, x=None, autoLabel=True):
inf = arr.infoCopy()
if arr.ndim != 1:
raise Exception('can only automatically plot 1 dimensional arrays.')
## create curve
try:
xv = arr.xvals(0)
#print 'xvals:', xv
except:
if x is None:
xv = arange(arr.shape[0])
else:
xv = x
c = PlotCurveItem()
c.setData(x=xv, y=arr.view(ndarray))
if autoLabel:
name = arr._info[0].get('name', None)
units = arr._info[0].get('units', None)
self.setLabel('bottom', text=name, units=units)
name = arr._info[1].get('name', None)
units = arr._info[1].get('units', None)
self.setLabel('left', text=name, units=units)
return c
def saveSvgClicked(self):
self.fileDialog = QtGui.QFileDialog()
#if PlotItem.lastFileDir is not None:
#self.fileDialog.setDirectory(PlotItem.lastFileDir)
self.fileDialog.setFileMode(QtGui.QFileDialog.AnyFile)
self.fileDialog.setAcceptMode(QtGui.QFileDialog.AcceptSave)
if PlotItem.lastFileDir is not None:
self.fileDialog.setDirectory(PlotItem.lastFileDir)
self.fileDialog.show()
QtCore.QObject.connect(self.fileDialog, QtCore.SIGNAL('fileSelected(const QString)'), self.writeSvg)
#def svgFileSelected(self, fileName):
##PlotWidget.lastFileDir = os.path.split(fileName)[0]
#self.writeSvg(str(fileName))
def saveImgClicked(self):
self.fileDialog = QtGui.QFileDialog()
#if PlotItem.lastFileDir is not None:
#self.fileDialog.setDirectory(PlotItem.lastFileDir)
if PlotItem.lastFileDir is not None:
self.fileDialog.setDirectory(PlotItem.lastFileDir)
self.fileDialog.setFileMode(QtGui.QFileDialog.AnyFile)
self.fileDialog.setAcceptMode(QtGui.QFileDialog.AcceptSave)
self.fileDialog.show()
QtCore.QObject.connect(self.fileDialog, QtCore.SIGNAL('fileSelected(const QString)'), self.writeImage)
def saveCsvClicked(self):
self.fileDialog = QtGui.QFileDialog()
#if PlotItem.lastFileDir is not None:
#self.fileDialog.setDirectory(PlotItem.lastFileDir)
if PlotItem.lastFileDir is not None:
self.fileDialog.setDirectory(PlotItem.lastFileDir)
self.fileDialog.setFileMode(QtGui.QFileDialog.AnyFile)
self.fileDialog.setAcceptMode(QtGui.QFileDialog.AcceptSave)
self.fileDialog.show()
QtCore.QObject.connect(self.fileDialog, QtCore.SIGNAL('fileSelected(const QString)'), self.writeCsv)
#def imgFileSelected(self, fileName):
##PlotWidget.lastFileDir = os.path.split(fileName)[0]
#self.writeImage(str(fileName))
class PlotWidgetManager(QtCore.QObject):
"""Used for managing communication between PlotWidgets"""
def __init__(self):
QtCore.QObject.__init__(self)
self.widgets = weakref.WeakValueDictionary() # Don't keep PlotWidgets around just because they are listed here
def addWidget(self, w, name):
self.widgets[name] = w
self.emit(QtCore.SIGNAL('widgetListChanged'), self.widgets.keys())
def removeWidget(self, name):
if name in self.widgets:
del self.widgets[name]
self.emit(QtCore.SIGNAL('widgetListChanged'), self.widgets.keys())
def listWidgets(self):
return self.widgets.keys()
def getWidget(self, name):
if name not in self.widgets:
return None
else:
return self.widgets[name]
def linkX(self, p1, p2):
QtCore.QObject.connect(p1, QtCore.SIGNAL('xRangeChanged'), p2.linkXChanged)
QtCore.QObject.connect(p2, QtCore.SIGNAL('xRangeChanged'), p1.linkXChanged)
p1.linkXChanged(p2)
#p2.setManualXScale()
def unlinkX(self, p1, p2):
QtCore.QObject.disconnect(p1, QtCore.SIGNAL('xRangeChanged'), p2.linkXChanged)
QtCore.QObject.disconnect(p2, QtCore.SIGNAL('xRangeChanged'), p1.linkXChanged)
def linkY(self, p1, p2):
QtCore.QObject.connect(p1, QtCore.SIGNAL('yRangeChanged'), p2.linkYChanged)
QtCore.QObject.connect(p2, QtCore.SIGNAL('yRangeChanged'), p1.linkYChanged)
p1.linkYChanged(p2)
#p2.setManualYScale()
def unlinkY(self, p1, p2):
QtCore.QObject.disconnect(p1, QtCore.SIGNAL('yRangeChanged'), p2.linkYChanged)
QtCore.QObject.disconnect(p2, QtCore.SIGNAL('yRangeChanged'), p1.linkYChanged)
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