354 lines
12 KiB
Python
354 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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from ..Node import Node
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from pyqtgraph.Qt import QtGui, QtCore
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import numpy as np
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from common import *
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from pyqtgraph.Transform import Transform
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from pyqtgraph.Point import Point
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from pyqtgraph.widgets.TreeWidget import TreeWidget
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from pyqtgraph.graphicsItems.LinearRegionItem import LinearRegionItem
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import functions
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try:
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import metaarray
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HAVE_METAARRAY = True
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except:
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HAVE_METAARRAY = False
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class ColumnSelectNode(Node):
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"""Select named columns from a record array or MetaArray."""
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nodeName = "ColumnSelect"
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def __init__(self, name):
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Node.__init__(self, name, terminals={'In': {'io': 'in'}})
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self.columns = set()
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self.columnList = QtGui.QListWidget()
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self.axis = 0
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self.columnList.itemChanged.connect(self.itemChanged)
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def process(self, In, display=True):
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if display:
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self.updateList(In)
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out = {}
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if HAVE_METAARRAY and isinstance(In, metaarray.MetaArray):
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for c in self.columns:
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out[c] = In[self.axis:c]
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elif isinstance(In, np.ndarray) and In.dtype.fields is not None:
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for c in self.columns:
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out[c] = In[c]
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else:
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self.In.setValueAcceptable(False)
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raise Exception("Input must be MetaArray or ndarray with named fields")
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return out
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def ctrlWidget(self):
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return self.columnList
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def updateList(self, data):
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if HAVE_METAARRAY and isinstance(data, metaarray.MetaArray):
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cols = data.listColumns()
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for ax in cols: ## find first axis with columns
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if len(cols[ax]) > 0:
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self.axis = ax
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cols = set(cols[ax])
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break
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else:
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cols = data.dtype.fields.keys()
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rem = set()
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for c in self.columns:
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if c not in cols:
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self.removeTerminal(c)
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rem.add(c)
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self.columns -= rem
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self.columnList.blockSignals(True)
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self.columnList.clear()
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for c in cols:
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item = QtGui.QListWidgetItem(c)
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item.setFlags(QtCore.Qt.ItemIsEnabled|QtCore.Qt.ItemIsUserCheckable)
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if c in self.columns:
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item.setCheckState(QtCore.Qt.Checked)
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else:
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item.setCheckState(QtCore.Qt.Unchecked)
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self.columnList.addItem(item)
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self.columnList.blockSignals(False)
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def itemChanged(self, item):
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col = str(item.text())
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if item.checkState() == QtCore.Qt.Checked:
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if col not in self.columns:
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self.columns.add(col)
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self.addOutput(col)
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else:
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if col in self.columns:
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self.columns.remove(col)
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self.removeTerminal(col)
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self.update()
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def saveState(self):
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state = Node.saveState(self)
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state['columns'] = list(self.columns)
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return state
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def restoreState(self, state):
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Node.restoreState(self, state)
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self.columns = set(state.get('columns', []))
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for c in self.columns:
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self.addOutput(c)
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class RegionSelectNode(CtrlNode):
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"""Returns a slice from a 1-D array. Connect the 'widget' output to a plot to display a region-selection widget."""
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nodeName = "RegionSelect"
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uiTemplate = [
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('start', 'spin', {'value': 0, 'step': 0.1}),
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('stop', 'spin', {'value': 0.1, 'step': 0.1}),
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('display', 'check', {'value': True}),
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('movable', 'check', {'value': True}),
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]
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def __init__(self, name):
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self.items = {}
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CtrlNode.__init__(self, name, terminals={
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'data': {'io': 'in'},
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'selected': {'io': 'out'},
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'region': {'io': 'out'},
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'widget': {'io': 'out', 'multi': True}
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})
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self.ctrls['display'].toggled.connect(self.displayToggled)
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self.ctrls['movable'].toggled.connect(self.movableToggled)
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def displayToggled(self, b):
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for item in self.items.itervalues():
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item.setVisible(b)
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def movableToggled(self, b):
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for item in self.items.itervalues():
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item.setMovable(b)
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def process(self, data=None, display=True):
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#print "process.."
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s = self.stateGroup.state()
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region = [s['start'], s['stop']]
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if display:
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conn = self['widget'].connections()
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for c in conn:
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plot = c.node().getPlot()
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if plot is None:
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continue
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if c in self.items:
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item = self.items[c]
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item.setRegion(region)
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#print " set rgn:", c, region
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#item.setXVals(events)
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else:
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item = LinearRegionItem(values=region)
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self.items[c] = item
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#item.connect(item, QtCore.SIGNAL('regionChanged'), self.rgnChanged)
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item.sigRegionChanged.connect(self.rgnChanged)
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item.setVisible(s['display'])
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item.setMovable(s['movable'])
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#print " new rgn:", c, region
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#self.items[c].setYRange([0., 0.2], relative=True)
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if self.selected.isConnected():
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if data is None:
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sliced = None
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elif isinstance(data, MetaArray):
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sliced = data[0:s['start']:s['stop']]
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else:
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mask = (data['time'] >= s['start']) * (data['time'] < s['stop'])
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sliced = data[mask]
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else:
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sliced = None
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return {'selected': sliced, 'widget': self.items, 'region': region}
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def rgnChanged(self, item):
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region = item.getRegion()
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self.stateGroup.setState({'start': region[0], 'stop': region[1]})
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self.update()
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class EvalNode(Node):
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"""Return the output of a string evaluated/executed by the python interpreter.
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The string may be either an expression or a python script, and inputs are accessed as the name of the terminal.
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For expressions, a single value may be evaluated for a single output, or a dict for multiple outputs.
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For a script, the text will be executed as the body of a function."""
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nodeName = 'PythonEval'
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def __init__(self, name):
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Node.__init__(self, name,
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terminals = {
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'input': {'io': 'in', 'renamable': True},
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'output': {'io': 'out', 'renamable': True},
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},
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allowAddInput=True, allowAddOutput=True)
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self.ui = QtGui.QWidget()
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self.layout = QtGui.QGridLayout()
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#self.addInBtn = QtGui.QPushButton('+Input')
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#self.addOutBtn = QtGui.QPushButton('+Output')
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self.text = QtGui.QTextEdit()
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self.text.setTabStopWidth(30)
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self.text.setPlainText("# Access inputs as args['input_name']\nreturn {'output': None} ## one key per output terminal")
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#self.layout.addWidget(self.addInBtn, 0, 0)
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#self.layout.addWidget(self.addOutBtn, 0, 1)
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self.layout.addWidget(self.text, 1, 0, 1, 2)
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self.ui.setLayout(self.layout)
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#QtCore.QObject.connect(self.addInBtn, QtCore.SIGNAL('clicked()'), self.addInput)
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#self.addInBtn.clicked.connect(self.addInput)
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#QtCore.QObject.connect(self.addOutBtn, QtCore.SIGNAL('clicked()'), self.addOutput)
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#self.addOutBtn.clicked.connect(self.addOutput)
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self.text.focusOutEvent = self.focusOutEvent
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self.lastText = None
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def ctrlWidget(self):
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return self.ui
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#def addInput(self):
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#Node.addInput(self, 'input', renamable=True)
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#def addOutput(self):
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#Node.addOutput(self, 'output', renamable=True)
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def focusOutEvent(self, ev):
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text = str(self.text.toPlainText())
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if text != self.lastText:
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self.lastText = text
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print "eval node update"
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self.update()
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return QtGui.QTextEdit.focusOutEvent(self.text, ev)
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def process(self, display=True, **args):
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l = locals()
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l.update(args)
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## try eval first, then exec
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try:
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text = str(self.text.toPlainText()).replace('\n', ' ')
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output = eval(text, globals(), l)
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except SyntaxError:
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fn = "def fn(**args):\n"
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run = "\noutput=fn(**args)\n"
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text = fn + "\n".join([" "+l for l in str(self.text.toPlainText()).split('\n')]) + run
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exec(text)
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return output
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def saveState(self):
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state = Node.saveState(self)
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state['text'] = str(self.text.toPlainText())
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state['terminals'] = self.saveTerminals()
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return state
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def restoreState(self, state):
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Node.restoreState(self, state)
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self.text.clear()
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self.text.insertPlainText(state['text'])
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self.restoreTerminals(state['terminals'])
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self.update()
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class ColumnJoinNode(Node):
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"""Concatenates record arrays and/or adds new columns"""
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nodeName = 'ColumnJoin'
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def __init__(self, name):
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Node.__init__(self, name, terminals = {
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'output': {'io': 'out'},
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})
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#self.items = []
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self.ui = QtGui.QWidget()
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self.layout = QtGui.QGridLayout()
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self.ui.setLayout(self.layout)
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self.tree = TreeWidget()
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self.addInBtn = QtGui.QPushButton('+ Input')
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self.remInBtn = QtGui.QPushButton('- Input')
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self.layout.addWidget(self.tree, 0, 0, 1, 2)
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self.layout.addWidget(self.addInBtn, 1, 0)
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self.layout.addWidget(self.remInBtn, 1, 1)
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self.addInBtn.clicked.connect(self.addInput)
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self.remInBtn.clicked.connect(self.remInput)
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self.tree.sigItemMoved.connect(self.update)
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def ctrlWidget(self):
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return self.ui
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def addInput(self):
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#print "ColumnJoinNode.addInput called."
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term = Node.addInput(self, 'input', renamable=True)
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#print "Node.addInput returned. term:", term
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item = QtGui.QTreeWidgetItem([term.name()])
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item.term = term
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term.joinItem = item
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#self.items.append((term, item))
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self.tree.addTopLevelItem(item)
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def remInput(self):
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sel = self.tree.currentItem()
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term = sel.term
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term.joinItem = None
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sel.term = None
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self.tree.removeTopLevelItem(sel)
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self.removeTerminal(term)
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self.update()
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def process(self, display=True, **args):
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order = self.order()
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vals = []
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for name in order:
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if name not in args:
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continue
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val = args[name]
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if isinstance(val, np.ndarray) and len(val.dtype) > 0:
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vals.append(val)
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else:
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vals.append((name, None, val))
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return {'output': functions.concatenateColumns(vals)}
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def order(self):
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return [str(self.tree.topLevelItem(i).text(0)) for i in range(self.tree.topLevelItemCount())]
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def saveState(self):
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state = Node.saveState(self)
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state['order'] = self.order()
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return state
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def restoreState(self, state):
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Node.restoreState(self, state)
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inputs = [inp.name() for inp in self.inputs()]
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for name in inputs:
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if name not in state['order']:
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self.removeTerminal(name)
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for name in state['order']:
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if name not in inputs:
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Node.addInput(self, name, renamable=True)
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self.tree.clear()
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for name in state['order']:
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term = self[name]
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item = QtGui.QTreeWidgetItem([name])
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item.term = term
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term.joinItem = item
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#self.items.append((term, item))
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self.tree.addTopLevelItem(item)
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def terminalRenamed(self, term, oldName):
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Node.terminalRenamed(self, term, oldName)
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item = term.joinItem
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item.setText(0, term.name())
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self.update()
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