664 lines
24 KiB
Python
664 lines
24 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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import numpy as np
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import scipy.stats
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__all__ = ['ScatterPlotItem', 'SpotItem']
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class ScatterPlotItem(GraphicsObject):
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"""
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Displays a set of x/y points. Instances of this class are created
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automatically as part of PlotDataItem; these rarely need to be instantiated
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directly.
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The size, shape, pen, and fill brush may be set for each point individually
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or for all points.
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======================== ===============================================
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**Signals:**
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sigPlotChanged(self) Emitted when the data being plotted has changed
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sigClicked(self, points) Emitted when the curve is clicked. Sends a list
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of all the points under the mouse pointer.
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======================== ===============================================
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"""
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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, *args, **kargs):
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"""
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Accepts the same arguments as setData()
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"""
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GraphicsObject.__init__(self)
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self.data = None
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self.spots = []
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self.bounds = [None, None]
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self.opts = {}
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self.spotsValid = False
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self._spotPixmap = None
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self.setPen(200,200,200)
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self.setBrush(100,100,150)
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self.setSymbol('o')
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self.setSize(7)
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self.setPxMode(True)
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self.setIdentical(False)
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self.setData(*args, **kargs)
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def setData(self, *args, **kargs):
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"""
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**Ordered Arguments:**
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* If there is only one unnamed argument, it will be interpreted like the 'spots' argument.
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* If there are two unnamed arguments, they will be interpreted as sequences of x and y values.
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====================== =================================================
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**Keyword Arguments:**
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*spots* Optional list of dicts. Each dict specifies parameters for a single spot:
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{'pos': (x,y), 'size', 'pen', 'brush', 'symbol'}. This is just an alternate method
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of passing in data for the corresponding arguments.
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*x*,*y* 1D arrays of x,y values.
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*pos* 2D structure of x,y pairs (such as Nx2 array or list of tuples)
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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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Default is True
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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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Default is False
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*symbol* can be one (or a list) of:
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* 'o' circle (default)
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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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*pen* The pen (or list of pens) to use for drawing spot outlines.
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*brush* The brush (or list of brushes) to use for filling spots.
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*size* The size (or list of sizes) of spots. If *pxMode* is True, this value is in pixels. Otherwise,
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it is in the item's local coordinate system.
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*data* a list of python objects used to uniquely identify each spot.
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====================== =================================================
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"""
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self.clear()
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## deal with non-keyword arguments
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if len(args) == 1:
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kargs['spots'] = args[0]
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elif len(args) == 2:
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kargs['x'] = args[0]
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kargs['y'] = args[1]
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elif len(args) > 2:
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raise Exception('Only accepts up to two non-keyword arguments.')
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## convert 'pos' argument to 'x' and 'y'
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if 'pos' in kargs:
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pos = kargs['pos']
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if isinstance(pos, np.ndarray):
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kargs['x'] = pos[:,0]
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kargs['y'] = pos[:,1]
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else:
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x = []
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y = []
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for p in pos:
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if isinstance(p, QtCore.QPointF):
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x.append(p.x())
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y.append(p.y())
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else:
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x.append(p[0])
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y.append(p[1])
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kargs['x'] = x
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kargs['y'] = y
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## determine how many spots we have
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if 'spots' in kargs:
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numPts = len(kargs['spots'])
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elif 'y' in kargs and kargs['y'] is not None:
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numPts = len(kargs['y'])
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else:
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kargs['x'] = []
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kargs['y'] = []
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numPts = 0
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## create empty record array
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self.data = np.empty(numPts, dtype=[('x', float), ('y', float), ('size', float), ('symbol', 'S1'), ('pen', object), ('brush', object), ('data', object), ('spot', object)])
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self.data['size'] = -1 ## indicates use default size
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self.data['symbol'] = ''
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self.data['pen'] = None
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self.data['brush'] = None
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self.data['data'] = None
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if 'spots' in kargs:
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spots = kargs['spots']
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for i in xrange(len(spots)):
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spot = spots[i]
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for k in spot:
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if k == 'pen':
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self.data[i][k] = fn.mkPen(spot[k])
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elif k == 'brush':
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self.data[i][k] = fn.mkBrush(spot[k])
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elif k == 'pos':
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pos = spot[k]
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if isinstance(pos, QtCore.QPointF):
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x,y = pos.x(), pos.y()
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else:
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x,y = pos[0], pos[1]
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self.data[i]['x'] = x
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self.data[i]['y'] = y
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elif k in ['x', 'y', 'size', 'symbol', 'data']:
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self.data[i][k] = spot[k]
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else:
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raise Exception("Unknown spot parameter: %s" % k)
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elif 'y' in kargs:
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self.data['x'] = kargs['x']
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self.data['y'] = kargs['y']
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## Set any extra parameters provided in keyword arguments
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for k in ['pxMode', 'identical', 'pen', 'brush', 'symbol', 'size']:
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if k in kargs:
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setMethod = getattr(self, 'set' + k[0].upper() + k[1:])
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setMethod(kargs[k])
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if 'data' in kargs:
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self.setPointData(kargs['data'])
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self.updateSpots()
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#pen = kargs.get('pen', (200,200,200))
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#brush = kargs.get('pen', (100,100,150))
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#if hasattr(pen, '__len__'):
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#pen = map(pg.mkPen(pen))
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#self.data['pen'] = pen
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#if hasattr(pen, '__len__'):
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#brush = map(pg.mkPen(pen))
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#self.data['brush'] = pen
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#self.data['size'] = kargs.get('size', 7)
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#self.data['symbol'] = kargs.get('symbol', 'o')
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#if spots is not None and len(spots) > 0:
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#spot = spots[0]
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#for k in spot:
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#self.data[k] = []
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#for spot in spots:
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#for k,v in spot.iteritems():
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#self.data[k].append(v)
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def setPoints(self, *args, **kargs):
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##Deprecated; use setData
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return self.setData(*args, **kargs)
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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.bounds = [[0,0],[0,0]]
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#self.addPoints(spots, x, y, data)
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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 setPen(self, *args, **kargs):
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if len(args) == 1 and (isinstance(args[0], np.ndarray) or isinstance(args[0], list)):
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pens = args[0]
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if self.data is None:
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raise Exception("Must set data before setting multiple pens.")
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if len(pens) != len(self.data):
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raise Exception("Number of pens does not match number of points (%d != %d)" % (len(pens), len(self.data)))
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for i in xrange(len(pens)):
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self.data[i]['pen'] = fn.mkPen(pens[i])
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else:
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self.opts['pen'] = fn.mkPen(*args, **kargs)
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self.updateSpots()
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def setBrush(self, *args, **kargs):
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if len(args) == 1 and (isinstance(args[0], np.ndarray) or isinstance(args[0], list)):
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brushes = args[0]
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if self.data is None:
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raise Exception("Must set data before setting multiple brushes.")
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if len(brushes) != len(self.data):
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raise Exception("Number of brushes does not match number of points (%d != %d)" % (len(brushes), len(self.data)))
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for i in xrange(len(brushes)):
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self.data[i]['brush'] = fn.mkBrush(brushes[i], **kargs)
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else:
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self.opts['brush'] = fn.mkBrush(*args, **kargs)
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self.updateSpots()
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def setSymbol(self, symbol):
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if isinstance(symbol, np.ndarray) or isinstance(symbol, list):
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symbols = symbol
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if self.data is None:
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raise Exception("Must set data before setting multiple symbols.")
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if len(symbols) != len(self.data):
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raise Exception("Number of symbols does not match number of points (%d != %d)" % (len(symbols), len(self.data)))
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self.data['symbol'] = symbols
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else:
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self.opts['symbol'] = symbol
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self.updateSpots()
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def setSize(self, size):
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if isinstance(size, np.ndarray) or isinstance(size, list):
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sizes = size
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if self.data is None:
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raise Exception("Must set data before setting multiple sizes.")
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if len(sizes) != len(self.data):
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raise Exception("Number of sizes does not match number of points (%d != %d)" % (len(sizes), len(self.data)))
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self.data['size'] = sizes
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else:
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self.opts['size'] = size
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self.updateSpots()
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def setPointData(self, data):
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if isinstance(data, np.ndarray) or isinstance(data, list):
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if self.data is None:
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raise Exception("Must set xy data before setting meta data.")
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if len(data) != len(self.data):
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raise Exception("Length of meta data does not match number of points (%d != %d)" % (len(data), len(self.data)))
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self.data['data'] = data
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self.updateSpots()
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def setIdentical(self, ident):
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self.opts['identical'] = ident
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self.updateSpots()
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def setPxMode(self, mode):
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self.opts['pxMode'] = mode
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self.updateSpots()
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def updateSpots(self):
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self.spotsValid = False
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self.update()
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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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self.data = None
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self.spotsValid = False
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self.bounds = [None, None]
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def dataBounds(self, ax, frac=1.0):
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if frac >= 1.0 and self.bounds[ax] is not None:
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return self.bounds[ax]
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if self.data is None or len(self.data) == 0:
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return (None, None)
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if ax == 0:
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d = self.data['x']
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elif ax == 1:
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d = self.data['y']
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if frac >= 1.0:
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minIndex = np.argmin(d)
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maxIndex = np.argmax(d)
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minVal = d[minIndex]
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maxVal = d[maxIndex]
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if not self.opts['pxMode']:
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minVal -= self.data[minIndex]['size']
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maxVal += self.data[maxIndex]['size']
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self.bounds[ax] = (minVal, maxVal)
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return self.bounds[ax]
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elif frac <= 0.0:
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raise Exception("Value for parameter 'frac' must be > 0. (got %s)" % str(frac))
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else:
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return (scipy.stats.scoreatpercentile(d, 50 - (frac * 50)), scipy.stats.scoreatpercentile(d, 50 + (frac * 50)))
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def addPoints(self, *args, **kargs):
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"""
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Add new points to the scatter plot.
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Arguments are the same as setData()
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Note: this is expensive; plenty of room for optimization here.
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"""
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if self.data is None:
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self.setData(*args, **kargs)
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return
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data1 = self.data[:]
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#range1 = [self.bounds[0][:], self.bounds[1][:]]
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self.setData(*args, **kargs)
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newData = np.empty(len(self.data) + len(data1), dtype=self.data.dtype)
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newData[:len(data1)] = data1
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newData[len(data1):] = self.data
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#self.bounds = [
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#[min(self.bounds[0][0], range1[0][0]), max(self.bounds[0][1], range1[0][1])],
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#[min(self.bounds[1][0], range1[1][0]), max(self.bounds[1][1], range1[1][1])],
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#]
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self.data = newData
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self.sigPlotChanged.emit(self)
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def generateSpots(self):
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xmn = ymn = xmx = ymx = None
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## apply defaults
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size = self.data['size'].copy()
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size[size<0] = self.opts['size']
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pen = self.data['pen'].copy()
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pen[pen<0] = self.opts['pen'] ## note pen<0 checks for pen==None
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brush = self.data['brush'].copy()
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brush[brush<0] = self.opts['brush']
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symbol = self.data['symbol'].copy()
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symbol[symbol==''] = self.opts['symbol']
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data = self.data['data'].copy()
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if 'data' in self.opts:
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data[data==None] = self.opts['data']
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for i in xrange(len(self.data)):
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s = self.data[i]
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pos = Point(s['x'], s['y'])
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if self.opts['pxMode']:
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psize = 0
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else:
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psize = size[i]
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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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item = self.mkSpot(pos, size[i], self.opts['pxMode'], brush[i], pen[i], data[i], symbol=symbol[i], index=len(self.spots))
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self.spots.append(item)
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self.data[i]['spot'] = 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.bounds = [[xmn, xmx], [ymn, ymx]]
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self.spotsValid = True
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self.sigPlotChanged.emit(self)
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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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if not self.spotsValid:
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self.generateSpots()
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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.opts['identical']:
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return None
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if self._spotPixmap is None:
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spot = SpotItem(size=self.opts['size'], pxMode=True, brush=self.opts['brush'], pen=self.opts['pen'], symbol=self.opts['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) = self.dataBounds(ax=0)
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(ymn, ymx) = self.dataBounds(ax=1)
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if xmn is None or xmx is None:
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xmn = 0
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xmx = 0
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if ymn is None or ymx is None:
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ymn = 0
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ymx = 0
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return QtCore.QRectF(xmn, ymn, xmx-xmn, ymx-ymn)
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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()
|
|
ph = self.pixelHeight()
|
|
pts = []
|
|
for s in self.spots:
|
|
sp = s.pos()
|
|
ss = s.size
|
|
sx = sp.x()
|
|
sy = sp.y()
|
|
s2x = s2y = ss * 0.5
|
|
if self.opts['pxMode']:
|
|
s2x *= pw
|
|
s2y *= ph
|
|
if x > sx-s2x and x < sx+s2x and y > sy-s2y and y < sy+s2y:
|
|
pts.append(s)
|
|
#print "HIT:", x, y, sx, sy, s2x, s2y
|
|
#else:
|
|
#print "No hit:", (x, y), (sx, sy)
|
|
#print " ", (sx-s2x, sy-s2y), (sx+s2x, sy+s2y)
|
|
pts.sort(lambda a,b: cmp(b.zValue(), a.zValue()))
|
|
return pts
|
|
|
|
|
|
#def mousePressEvent(self, ev):
|
|
#QtGui.QGraphicsItem.mousePressEvent(self, ev)
|
|
#if ev.button() == QtCore.Qt.LeftButton:
|
|
#pts = self.pointsAt(ev.pos())
|
|
#if len(pts) > 0:
|
|
#self.mouseMoved = False
|
|
#self.ptsClicked = pts
|
|
#ev.accept()
|
|
#else:
|
|
##print "no spots"
|
|
#ev.ignore()
|
|
#else:
|
|
#ev.ignore()
|
|
|
|
#def mouseMoveEvent(self, ev):
|
|
#QtGui.QGraphicsItem.mouseMoveEvent(self, ev)
|
|
#self.mouseMoved = True
|
|
#pass
|
|
|
|
#def mouseReleaseEvent(self, ev):
|
|
#QtGui.QGraphicsItem.mouseReleaseEvent(self, ev)
|
|
#if not self.mouseMoved:
|
|
#self.sigClicked.emit(self, self.ptsClicked)
|
|
|
|
def mouseClickEvent(self, ev):
|
|
if ev.button() == QtCore.Qt.LeftButton:
|
|
pts = self.pointsAt(ev.pos())
|
|
if len(pts) > 0:
|
|
self.ptsClicked = pts
|
|
self.sigClicked.emit(self, self.ptsClicked)
|
|
ev.accept()
|
|
else:
|
|
#print "no spots"
|
|
ev.ignore()
|
|
else:
|
|
ev.ignore()
|
|
|
|
|
|
|
|
class SpotItem(GraphicsObject):
|
|
#sigClicked = QtCore.Signal(object)
|
|
|
|
def __init__(self, size, pxMode, brush, pen, data=None, symbol=None, image=None, index=None):
|
|
GraphicsObject.__init__(self)
|
|
self.pxMode = pxMode
|
|
|
|
try:
|
|
symbol = int(symbol)
|
|
except:
|
|
pass
|
|
|
|
if symbol is None:
|
|
symbol = 'o' ## circle by default
|
|
elif isinstance(symbol, int): ## allow symbols specified by integer for easy iteration
|
|
symbol = ['o', 's', 't', 'd', '+'][symbol]
|
|
|
|
|
|
|
|
####print 'SpotItem symbol: ', symbol
|
|
self.data = data
|
|
self.pen = pen
|
|
self.brush = brush
|
|
self.size = size
|
|
self.index = index
|
|
self.symbol = symbol
|
|
#s2 = size/2.
|
|
self.path = QtGui.QPainterPath()
|
|
|
|
if symbol == 'o':
|
|
self.path.addEllipse(QtCore.QRectF(-0.5, -0.5, 1, 1))
|
|
elif symbol == 's':
|
|
self.path.addRect(QtCore.QRectF(-0.5, -0.5, 1, 1))
|
|
elif symbol == 't' or symbol == '^':
|
|
self.path.moveTo(-0.5, -0.5)
|
|
self.path.lineTo(0, 0.5)
|
|
self.path.lineTo(0.5, -0.5)
|
|
self.path.closeSubpath()
|
|
#self.path.connectPath(self.path)
|
|
elif symbol == 'd':
|
|
self.path.moveTo(0., -0.5)
|
|
self.path.lineTo(-0.4, 0.)
|
|
self.path.lineTo(0, 0.5)
|
|
self.path.lineTo(0.4, 0)
|
|
self.path.closeSubpath()
|
|
#self.path.connectPath(self.path)
|
|
elif symbol == '+':
|
|
self.path.moveTo(-0.5, -0.01)
|
|
self.path.lineTo(-0.5, 0.01)
|
|
self.path.lineTo(-0.01, 0.01)
|
|
self.path.lineTo(-0.01, 0.5)
|
|
self.path.lineTo(0.01, 0.5)
|
|
self.path.lineTo(0.01, 0.01)
|
|
self.path.lineTo(0.5, 0.01)
|
|
self.path.lineTo(0.5, -0.01)
|
|
self.path.lineTo(0.01, -0.01)
|
|
self.path.lineTo(0.01, -0.5)
|
|
self.path.lineTo(-0.01, -0.5)
|
|
self.path.lineTo(-0.01, -0.01)
|
|
self.path.closeSubpath()
|
|
#self.path.connectPath(self.path)
|
|
#elif symbol == 'x':
|
|
else:
|
|
raise Exception("Unknown spot symbol '%s' (type=%s)" % (str(symbol), str(type(symbol))))
|
|
#self.path.addEllipse(QtCore.QRectF(-0.5, -0.5, 1, 1))
|
|
|
|
if pxMode:
|
|
## pre-render an image of the spot and display this rather than redrawing every time.
|
|
if image is None:
|
|
self.pixmap = self.makeSpotImage(size, pen, brush, symbol)
|
|
else:
|
|
self.pixmap = image ## image is already provided (probably shared with other spots)
|
|
self.setFlags(self.flags() | self.ItemIgnoresTransformations | self.ItemHasNoContents)
|
|
self.pi = QtGui.QGraphicsPixmapItem(self.pixmap, self)
|
|
self.pi.setPos(-0.5*size, -0.5*size)
|
|
else:
|
|
self.scale(size, size)
|
|
|
|
|
|
def makeSpotImage(self, size, pen, brush, symbol=None):
|
|
self.spotImage = QtGui.QImage(size+2, size+2, QtGui.QImage.Format_ARGB32_Premultiplied)
|
|
self.spotImage.fill(0)
|
|
p = QtGui.QPainter(self.spotImage)
|
|
p.setRenderHint(p.Antialiasing)
|
|
p.translate(size*0.5+1, size*0.5+1)
|
|
p.scale(size, size)
|
|
self.paint(p, None, None)
|
|
p.end()
|
|
return QtGui.QPixmap(self.spotImage)
|
|
|
|
|
|
def setBrush(self, brush):
|
|
self.brush = fn.mkBrush(brush)
|
|
self.update()
|
|
|
|
def setPen(self, pen):
|
|
self.pen = fn.mkPen(pen)
|
|
self.update()
|
|
|
|
def boundingRect(self):
|
|
return self.path.boundingRect()
|
|
|
|
def shape(self):
|
|
return self.path
|
|
|
|
def paint(self, p, *opts):
|
|
p.setPen(self.pen)
|
|
p.setBrush(self.brush)
|
|
p.drawPath(self.path)
|
|
|