378 lines
13 KiB
Python
378 lines
13 KiB
Python
from pyqtgraph.Qt import QtGui, QtCore
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from pyqtgraph.Point import Point
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import pyqtgraph.functions as fn
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from GraphicsObject import GraphicsObject
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__all__ = ['ScatterPlotItem', 'SpotItem']
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class ScatterPlotItem(GraphicsObject):
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#sigPointClicked = QtCore.Signal(object, object)
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sigClicked = QtCore.Signal(object, object) ## self, points
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sigPlotChanged = QtCore.Signal(object)
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def __init__(self, spots=None, x=None, y=None, pxMode=True, pen='default', brush='default', size=7,
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symbol=None, identical=False, data=None):
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"""
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Arguments:
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spots: list of dicts. Each dict specifies parameters for a single spot:
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{'pos': (x,y), 'size', 'pen', 'brush', 'symbol'}
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x,y: array of x,y values. Alternatively, specify spots['pos'] = (x,y)
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pxMode: If True, spots are always the same size regardless of scaling, and size is given in px.
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Otherwise, size is in scene coordinates and the spots scale with the view.
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identical: If True, all spots are forced to look identical.
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This can result in performance enhancement.
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symbol can be one of:
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'o' circle
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's' square
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't' triangle
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'd' diamond
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'+' plus
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"""
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GraphicsObject.__init__(self)
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self.spots = []
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self.range = [[0,0], [0,0]]
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self.identical = identical
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self._spotPixmap = None
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if brush == 'default':
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self.brush = QtGui.QBrush(QtGui.QColor(100, 100, 150))
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else:
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self.brush = fn.mkBrush(brush)
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if pen == 'default':
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self.pen = QtGui.QPen(QtGui.QColor(200, 200, 200))
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else:
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self.pen = fn.mkPen(pen)
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self.symbol = symbol
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self.size = size
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self.pxMode = pxMode
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if spots is not None or x is not None:
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self.setPoints(spots, x, y, data)
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#self.optimize = optimize
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#if optimize:
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#self.spotImage = QtGui.QImage(size, size, QtGui.QImage.Format_ARGB32_Premultiplied)
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#self.spotImage.fill(0)
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#p = QtGui.QPainter(self.spotImage)
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#p.setRenderHint(p.Antialiasing)
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#p.setBrush(brush)
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#p.setPen(pen)
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#p.drawEllipse(0, 0, size, size)
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#p.end()
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#self.optimizePixmap = QtGui.QPixmap(self.spotImage)
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#self.optimizeFragments = []
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#self.setFlags(self.flags() | self.ItemIgnoresTransformations)
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def implements(self, interface=None):
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ints = ['plotData']
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if interface is None:
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return ints
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return interface in ints
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def setPxMode(self, mode):
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self.pxMode = mode
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def clear(self):
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for i in self.spots:
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i.setParentItem(None)
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s = i.scene()
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if s is not None:
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s.removeItem(i)
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self.spots = []
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def getRange(self, ax, percent):
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return self.range[ax]
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def setPoints(self, spots=None, x=None, y=None, data=None):
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"""
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Remove all existing points in the scatter plot and add a new set.
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Arguments:
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spots - list of dicts specifying parameters for each spot
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[ {'pos': (x,y), 'pen': 'r', ...}, ...]
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x, y - arrays specifying location of spots to add.
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all other parameters (pen, symbol, etc.) will be set to the default
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values for this scatter plot.
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these arguments are IGNORED if 'spots' is specified
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data - list of arbitrary objects to be assigned to spot.data for each spot
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(this is useful for identifying spots that are clicked on)
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"""
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self.clear()
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self.range = [[0,0],[0,0]]
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self.addPoints(spots, x, y, data)
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def addPoints(self, spots=None, x=None, y=None, data=None):
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xmn = ymn = xmx = ymx = None
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if spots is not None:
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n = len(spots)
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else:
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n = len(x)
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for i in range(n):
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if spots is not None:
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s = spots[i]
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pos = Point(s['pos'])
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else:
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s = {}
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pos = Point(x[i], y[i])
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if data is not None:
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s['data'] = data[i]
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size = s.get('size', self.size)
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if self.pxMode:
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psize = 0
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else:
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psize = size
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if xmn is None:
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xmn = pos[0]-psize
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xmx = pos[0]+psize
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ymn = pos[1]-psize
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ymx = pos[1]+psize
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else:
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xmn = min(xmn, pos[0]-psize)
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xmx = max(xmx, pos[0]+psize)
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ymn = min(ymn, pos[1]-psize)
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ymx = max(ymx, pos[1]+psize)
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#print pos, xmn, xmx, ymn, ymx
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brush = s.get('brush', self.brush)
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pen = s.get('pen', self.pen)
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pen.setCosmetic(True)
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symbol = s.get('symbol', self.symbol)
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data2 = s.get('data', None)
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item = self.mkSpot(pos, size, self.pxMode, brush, pen, data2, symbol=symbol, index=len(self.spots))
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self.spots.append(item)
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#if self.optimize:
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#item.hide()
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#frag = QtGui.QPainter.PixmapFragment.create(pos, QtCore.QRectF(0, 0, size, size))
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#self.optimizeFragments.append(frag)
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self.range = [[xmn, xmx], [ymn, ymx]]
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#def setPointSize(self, size):
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#for s in self.spots:
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#s.size = size
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##self.setPoints([{'size':s.size, 'pos':s.pos(), 'data':s.data} for s in self.spots])
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#self.setPoints()
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#def paint(self, p, *args):
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#if not self.optimize:
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#return
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##p.setClipRegion(self.boundingRect())
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#p.drawPixmapFragments(self.optimizeFragments, self.optimizePixmap)
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def paint(self, *args):
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pass
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def spotPixmap(self):
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## If all spots are identical, return the pixmap to use for all spots
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## Otherwise return None
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if not self.identical:
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return None
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if self._spotPixmap is None:
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#print 'spotPixmap'
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spot = SpotItem(size=self.size, pxMode=True, brush=self.brush, pen=self.pen, symbol=self.symbol)
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#self._spotPixmap = PixmapSpotItem.makeSpotImage(self.size, self.pen, self.brush, self.symbol)
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self._spotPixmap = spot.pixmap
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return self._spotPixmap
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def mkSpot(self, pos, size, pxMode, brush, pen, data, symbol=None, index=None):
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## Make and return a SpotItem (or PixmapSpotItem if in pxMode)
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brush = fn.mkBrush(brush)
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pen = fn.mkPen(pen)
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if pxMode:
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img = self.spotPixmap() ## returns None if not using identical mode
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#item = PixmapSpotItem(size, brush, pen, data, image=img, symbol=symbol, index=index)
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item = SpotItem(size, pxMode, brush, pen, data, symbol=symbol, image=img, index=index)
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else:
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item = SpotItem(size, pxMode, brush, pen, data, symbol=symbol, index=index)
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item.setParentItem(self)
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item.setPos(pos)
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#item.sigClicked.connect(self.pointClicked)
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return item
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def boundingRect(self):
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((xmn, xmx), (ymn, ymx)) = self.range
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if xmn is None or xmx is None or ymn is None or ymx is None:
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return QtCore.QRectF()
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return QtCore.QRectF(xmn, ymn, xmx-xmn, ymx-ymn)
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#return QtCore.QRectF(xmn-1, ymn-1, xmx-xmn+2, ymx-ymn+2)
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#def pointClicked(self, point):
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#self.sigPointClicked.emit(self, point)
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def points(self):
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return self.spots[:]
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def pointsAt(self, pos):
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x = pos.x()
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y = pos.y()
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pw = self.pixelWidth()
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ph = self.pixelHeight()
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pts = []
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for s in self.spots:
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sp = s.pos()
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ss = s.size
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sx = sp.x()
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sy = sp.y()
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s2x = s2y = ss * 0.5
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if self.pxMode:
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s2x *= pw
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s2y *= ph
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if x > sx-s2x and x < sx+s2x and y > sy-s2y and y < sy+s2y:
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pts.append(s)
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#print "HIT:", x, y, sx, sy, s2x, s2y
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#else:
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#print "No hit:", (x, y), (sx, sy)
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#print " ", (sx-s2x, sy-s2y), (sx+s2x, sy+s2y)
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pts.sort(lambda a,b: cmp(b.zValue(), a.zValue()))
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return pts
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#def mousePressEvent(self, ev):
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#QtGui.QGraphicsItem.mousePressEvent(self, ev)
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#if ev.button() == QtCore.Qt.LeftButton:
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#pts = self.pointsAt(ev.pos())
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#if len(pts) > 0:
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#self.mouseMoved = False
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#self.ptsClicked = pts
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#ev.accept()
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#else:
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##print "no spots"
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#ev.ignore()
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#else:
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#ev.ignore()
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#def mouseMoveEvent(self, ev):
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#QtGui.QGraphicsItem.mouseMoveEvent(self, ev)
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#self.mouseMoved = True
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#pass
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#def mouseReleaseEvent(self, ev):
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#QtGui.QGraphicsItem.mouseReleaseEvent(self, ev)
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#if not self.mouseMoved:
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#self.sigClicked.emit(self, self.ptsClicked)
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def mouseClickEvent(self, ev):
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if ev.button() == QtCore.Qt.LeftButton:
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pts = self.pointsAt(ev.pos())
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if len(pts) > 0:
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self.ptsClicked = pts
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self.sigClicked.emit(self, self.ptsClicked)
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ev.accept()
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else:
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#print "no spots"
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ev.ignore()
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else:
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ev.ignore()
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class SpotItem(GraphicsObject):
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#sigClicked = QtCore.Signal(object)
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def __init__(self, size, pxMode, brush, pen, data=None, symbol=None, image=None, index=None):
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GraphicsObject.__init__(self)
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self.pxMode = pxMode
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if symbol is None:
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symbol = 'o' ## circle by default
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elif isinstance(symbol, int): ## allow symbols specified by integer for easy iteration
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symbol = ['o', 's', 't', 'd', '+'][symbol]
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####print 'SpotItem symbol: ', symbol
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self.data = data
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self.pen = pen
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self.brush = brush
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self.size = size
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self.index = index
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self.symbol = symbol
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#s2 = size/2.
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self.path = QtGui.QPainterPath()
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if symbol == 'o':
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self.path.addEllipse(QtCore.QRectF(-0.5, -0.5, 1, 1))
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elif symbol == 's':
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self.path.addRect(QtCore.QRectF(-0.5, -0.5, 1, 1))
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elif symbol is 't' or symbol is '^':
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self.path.moveTo(-0.5, -0.5)
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self.path.lineTo(0, 0.5)
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self.path.lineTo(0.5, -0.5)
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self.path.closeSubpath()
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#self.path.connectPath(self.path)
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elif symbol == 'd':
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self.path.moveTo(0., -0.5)
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self.path.lineTo(-0.4, 0.)
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self.path.lineTo(0, 0.5)
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self.path.lineTo(0.4, 0)
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self.path.closeSubpath()
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#self.path.connectPath(self.path)
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elif symbol == '+':
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self.path.moveTo(-0.5, -0.01)
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self.path.lineTo(-0.5, 0.01)
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self.path.lineTo(-0.01, 0.01)
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self.path.lineTo(-0.01, 0.5)
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self.path.lineTo(0.01, 0.5)
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self.path.lineTo(0.01, 0.01)
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self.path.lineTo(0.5, 0.01)
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self.path.lineTo(0.5, -0.01)
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self.path.lineTo(0.01, -0.01)
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self.path.lineTo(0.01, -0.5)
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self.path.lineTo(-0.01, -0.5)
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self.path.lineTo(-0.01, -0.01)
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self.path.closeSubpath()
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#self.path.connectPath(self.path)
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#elif symbol == 'x':
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else:
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raise Exception("Unknown spot symbol '%s'" % symbol)
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#self.path.addEllipse(QtCore.QRectF(-0.5, -0.5, 1, 1))
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if pxMode:
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## pre-render an image of the spot and display this rather than redrawing every time.
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if image is None:
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self.pixmap = self.makeSpotImage(size, pen, brush, symbol)
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else:
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self.pixmap = image ## image is already provided (probably shared with other spots)
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self.setFlags(self.flags() | self.ItemIgnoresTransformations | self.ItemHasNoContents)
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self.pi = QtGui.QGraphicsPixmapItem(self.pixmap, self)
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self.pi.setPos(-0.5*size, -0.5*size)
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else:
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self.scale(size, size)
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def makeSpotImage(self, size, pen, brush, symbol=None):
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self.spotImage = QtGui.QImage(size+2, size+2, QtGui.QImage.Format_ARGB32_Premultiplied)
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self.spotImage.fill(0)
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p = QtGui.QPainter(self.spotImage)
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p.setRenderHint(p.Antialiasing)
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p.translate(size*0.5+1, size*0.5+1)
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p.scale(size, size)
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self.paint(p, None, None)
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p.end()
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return QtGui.QPixmap(self.spotImage)
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def setBrush(self, brush):
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self.brush = fn.mkBrush(brush)
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self.update()
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def setPen(self, pen):
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self.pen = fn.mkPen(pen)
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self.update()
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def boundingRect(self):
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return self.path.boundingRect()
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def shape(self):
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return self.path
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def paint(self, p, *opts):
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p.setPen(self.pen)
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p.setBrush(self.brush)
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p.drawPath(self.path)
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