974 lines
37 KiB
Python
974 lines
37 KiB
Python
from ..Qt import QtGui, QtCore, USE_PYSIDE
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from ..Point import Point
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from .. import functions as fn
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from .GraphicsItem import GraphicsItem
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from .GraphicsObject import GraphicsObject
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from itertools import starmap, repeat
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try:
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from itertools import imap
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except ImportError:
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imap = map
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import numpy as np
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import weakref
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from .. import getConfigOption
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from .. import debug as debug
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from ..pgcollections import OrderedDict
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from .. import debug
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__all__ = ['ScatterPlotItem', 'SpotItem']
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## Build all symbol paths
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Symbols = OrderedDict([(name, QtGui.QPainterPath()) for name in ['o', 's', 't', 'd', '+', 'x']])
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Symbols['o'].addEllipse(QtCore.QRectF(-0.5, -0.5, 1, 1))
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Symbols['s'].addRect(QtCore.QRectF(-0.5, -0.5, 1, 1))
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coords = {
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't': [(-0.5, -0.5), (0, 0.5), (0.5, -0.5)],
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'd': [(0., -0.5), (-0.4, 0.), (0, 0.5), (0.4, 0)],
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'+': [
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(-0.5, -0.05), (-0.5, 0.05), (-0.05, 0.05), (-0.05, 0.5),
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(0.05, 0.5), (0.05, 0.05), (0.5, 0.05), (0.5, -0.05),
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(0.05, -0.05), (0.05, -0.5), (-0.05, -0.5), (-0.05, -0.05)
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],
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}
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for k, c in coords.items():
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Symbols[k].moveTo(*c[0])
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for x,y in c[1:]:
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Symbols[k].lineTo(x, y)
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Symbols[k].closeSubpath()
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tr = QtGui.QTransform()
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tr.rotate(45)
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Symbols['x'] = tr.map(Symbols['+'])
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def drawSymbol(painter, symbol, size, pen, brush):
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if symbol is None:
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return
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painter.scale(size, size)
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painter.setPen(pen)
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painter.setBrush(brush)
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if isinstance(symbol, basestring):
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symbol = Symbols[symbol]
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if np.isscalar(symbol):
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symbol = list(Symbols.values())[symbol % len(Symbols)]
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painter.drawPath(symbol)
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def renderSymbol(symbol, size, pen, brush, device=None):
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"""
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Render a symbol specification to QImage.
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Symbol may be either a QPainterPath or one of the keys in the Symbols dict.
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If *device* is None, a new QPixmap will be returned. Otherwise,
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the symbol will be rendered into the device specified (See QPainter documentation
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for more information).
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"""
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## Render a spot with the given parameters to a pixmap
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penPxWidth = max(np.ceil(pen.widthF()), 1)
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if device is None:
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device = QtGui.QImage(int(size+penPxWidth), int(size+penPxWidth), QtGui.QImage.Format_ARGB32)
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device.fill(0)
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p = QtGui.QPainter(device)
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try:
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p.setRenderHint(p.Antialiasing)
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p.translate(device.width()*0.5, device.height()*0.5)
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drawSymbol(p, symbol, size, pen, brush)
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finally:
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p.end()
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return device
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def makeSymbolPixmap(size, pen, brush, symbol):
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## deprecated
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img = renderSymbol(symbol, size, pen, brush)
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return QtGui.QPixmap(img)
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class SymbolAtlas(object):
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"""
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Used to efficiently construct a single QPixmap containing all rendered symbols
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for a ScatterPlotItem. This is required for fragment rendering.
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Use example:
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atlas = SymbolAtlas()
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sc1 = atlas.getSymbolCoords('o', 5, QPen(..), QBrush(..))
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sc2 = atlas.getSymbolCoords('t', 10, QPen(..), QBrush(..))
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pm = atlas.getAtlas()
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"""
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def __init__(self):
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# symbol key : QRect(...) coordinates where symbol can be found in atlas.
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# note that the coordinate list will always be the same list object as
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# long as the symbol is in the atlas, but the coordinates may
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# change if the atlas is rebuilt.
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# weak value; if all external refs to this list disappear,
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# the symbol will be forgotten.
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self.symbolMap = weakref.WeakValueDictionary()
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self.atlasData = None # numpy array of atlas image
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self.atlas = None # atlas as QPixmap
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self.atlasValid = False
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self.max_width=0
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def getSymbolCoords(self, opts):
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"""
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Given a list of spot records, return an object representing the coordinates of that symbol within the atlas
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"""
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sourceRect = np.empty(len(opts), dtype=object)
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keyi = None
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sourceRecti = None
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for i, rec in enumerate(opts):
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key = (rec[3], rec[2], id(rec[4]), id(rec[5])) # TODO: use string indexes?
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if key == keyi:
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sourceRect[i] = sourceRecti
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else:
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try:
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sourceRect[i] = self.symbolMap[key]
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except KeyError:
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newRectSrc = QtCore.QRectF()
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newRectSrc.pen = rec['pen']
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newRectSrc.brush = rec['brush']
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self.symbolMap[key] = newRectSrc
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self.atlasValid = False
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sourceRect[i] = newRectSrc
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keyi = key
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sourceRecti = newRectSrc
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return sourceRect
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def buildAtlas(self):
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# get rendered array for all symbols, keep track of avg/max width
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rendered = {}
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avgWidth = 0.0
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maxWidth = 0
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images = []
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for key, sourceRect in self.symbolMap.items():
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if sourceRect.width() == 0:
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img = renderSymbol(key[0], key[1], sourceRect.pen, sourceRect.brush)
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images.append(img) ## we only need this to prevent the images being garbage collected immediately
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arr = fn.imageToArray(img, copy=False, transpose=False)
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else:
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(y,x,h,w) = sourceRect.getRect()
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arr = self.atlasData[x:x+w, y:y+w]
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rendered[key] = arr
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w = arr.shape[0]
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avgWidth += w
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maxWidth = max(maxWidth, w)
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nSymbols = len(rendered)
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if nSymbols > 0:
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avgWidth /= nSymbols
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width = max(maxWidth, avgWidth * (nSymbols**0.5))
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else:
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avgWidth = 0
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width = 0
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# sort symbols by height
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symbols = sorted(rendered.keys(), key=lambda x: rendered[x].shape[1], reverse=True)
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self.atlasRows = []
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x = width
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y = 0
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rowheight = 0
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for key in symbols:
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arr = rendered[key]
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w,h = arr.shape[:2]
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if x+w > width:
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y += rowheight
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x = 0
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rowheight = h
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self.atlasRows.append([y, rowheight, 0])
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self.symbolMap[key].setRect(y, x, h, w)
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x += w
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self.atlasRows[-1][2] = x
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height = y + rowheight
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self.atlasData = np.zeros((width, height, 4), dtype=np.ubyte)
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for key in symbols:
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y, x, h, w = self.symbolMap[key].getRect()
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self.atlasData[x:x+w, y:y+h] = rendered[key]
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self.atlas = None
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self.atlasValid = True
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self.max_width = maxWidth
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def getAtlas(self):
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if not self.atlasValid:
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self.buildAtlas()
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if self.atlas is None:
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if len(self.atlasData) == 0:
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return QtGui.QPixmap(0,0)
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img = fn.makeQImage(self.atlasData, copy=False, transpose=False)
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self.atlas = QtGui.QPixmap(img)
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return self.atlas
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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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profiler = debug.Profiler()
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GraphicsObject.__init__(self)
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self.picture = None # QPicture used for rendering when pxmode==False
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self.fragmentAtlas = SymbolAtlas()
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self.data = np.empty(0, dtype=[('x', float), ('y', float), ('size', float), ('symbol', object), ('pen', object), ('brush', object), ('data', object), ('item', object), ('sourceRect', object), ('targetRect', object), ('width', float)])
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self.bounds = [None, None] ## caches data bounds
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self._maxSpotWidth = 0 ## maximum size of the scale-variant portion of all spots
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self._maxSpotPxWidth = 0 ## maximum size of the scale-invariant portion of all spots
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self.opts = {
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'pxMode': True,
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'useCache': True, ## If useCache is False, symbols are re-drawn on every paint.
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'antialias': getConfigOption('antialias'),
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'name': None,
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}
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self.setPen(fn.mkPen(getConfigOption('foreground')), update=False)
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self.setBrush(fn.mkBrush(100,100,150), update=False)
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self.setSymbol('o', update=False)
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self.setSize(7, update=False)
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profiler()
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self.setData(*args, **kargs)
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profiler('setData')
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#self.setCacheMode(self.DeviceCoordinateCache)
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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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*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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* any QPainterPath to specify custom symbol shapes. To properly obey the position and size,
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custom symbols should be centered at (0,0) and width and height of 1.0. Note that it is also
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possible to 'install' custom shapes by setting ScatterPlotItem.Symbols[key] = shape.
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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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*identical* *Deprecated*. This functionality is handled automatically now.
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*antialias* Whether to draw symbols with antialiasing. Note that if pxMode is True, symbols are
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always rendered with antialiasing (since the rendered symbols can be cached, this
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incurs very little performance cost)
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*name* The name of this item. Names are used for automatically
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generating LegendItem entries and by some exporters.
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====================== ===============================================================================================
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"""
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oldData = self.data ## this causes cached pixmaps to be preserved while new data is registered.
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self.clear() ## clear out all old data
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self.addPoints(*args, **kargs)
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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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"""
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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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## Extend record array
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oldData = self.data
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self.data = np.empty(len(oldData)+numPts, dtype=self.data.dtype)
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## note that np.empty initializes object fields to None and string fields to ''
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self.data[:len(oldData)] = oldData
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#for i in range(len(oldData)):
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#oldData[i]['item']._data = self.data[i] ## Make sure items have proper reference to new array
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newData = self.data[len(oldData):]
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newData['size'] = -1 ## indicates to use default size
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if 'spots' in kargs:
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spots = kargs['spots']
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for i in range(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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#newData[k] = fn.mkPen(spot[k])
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#elif k == 'brush':
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#newData[k] = fn.mkBrush(spot[k])
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if 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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newData[i]['x'] = x
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newData[i]['y'] = y
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elif k in ['x', 'y', 'size', 'symbol', 'pen', 'brush', 'data']:
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newData[i][k] = spot[k]
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#elif k == 'data':
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#self.pointData[i] = 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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newData['x'] = kargs['x']
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newData['y'] = kargs['y']
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if 'pxMode' in kargs:
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self.setPxMode(kargs['pxMode'])
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if 'antialias' in kargs:
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self.opts['antialias'] = kargs['antialias']
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## Set any extra parameters provided in keyword arguments
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for k in ['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], update=False, dataSet=newData, mask=kargs.get('mask', None))
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if 'data' in kargs:
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self.setPointData(kargs['data'], dataSet=newData)
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self.prepareGeometryChange()
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self.informViewBoundsChanged()
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self.bounds = [None, None]
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self.invalidate()
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self.updateSpots(newData)
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self.sigPlotChanged.emit(self)
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def invalidate(self):
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## clear any cached drawing state
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self.picture = None
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self.update()
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def getData(self):
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return self.data['x'], self.data['y']
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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 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 name(self):
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return self.opts.get('name', None)
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def setPen(self, *args, **kargs):
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"""Set the pen(s) used to draw the outline around each spot.
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If a list or array is provided, then the pen for each spot will be set separately.
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Otherwise, the arguments are passed to pg.mkPen and used as the default pen for
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all spots which do not have a pen explicitly set."""
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update = kargs.pop('update', True)
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dataSet = kargs.pop('dataSet', self.data)
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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 kargs['mask'] is not None:
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pens = pens[kargs['mask']]
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if len(pens) != len(dataSet):
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raise Exception("Number of pens does not match number of points (%d != %d)" % (len(pens), len(dataSet)))
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dataSet['pen'] = pens
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else:
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self.opts['pen'] = fn.mkPen(*args, **kargs)
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dataSet['sourceRect'] = None
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if update:
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self.updateSpots(dataSet)
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def setBrush(self, *args, **kargs):
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"""Set the brush(es) used to fill the interior of each spot.
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If a list or array is provided, then the brush for each spot will be set separately.
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Otherwise, the arguments are passed to pg.mkBrush and used as the default brush for
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all spots which do not have a brush explicitly set."""
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update = kargs.pop('update', True)
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dataSet = kargs.pop('dataSet', self.data)
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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 kargs['mask'] is not None:
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brushes = brushes[kargs['mask']]
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if len(brushes) != len(dataSet):
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raise Exception("Number of brushes does not match number of points (%d != %d)" % (len(brushes), len(dataSet)))
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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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dataSet['brush'] = brushes
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else:
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self.opts['brush'] = fn.mkBrush(*args, **kargs)
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#self._spotPixmap = None
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dataSet['sourceRect'] = None
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if update:
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self.updateSpots(dataSet)
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|
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def setSymbol(self, symbol, update=True, dataSet=None, mask=None):
|
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"""Set the symbol(s) used to draw each spot.
|
|
If a list or array is provided, then the symbol for each spot will be set separately.
|
|
Otherwise, the argument will be used as the default symbol for
|
|
all spots which do not have a symbol explicitly set."""
|
|
if dataSet is None:
|
|
dataSet = self.data
|
|
|
|
if isinstance(symbol, np.ndarray) or isinstance(symbol, list):
|
|
symbols = symbol
|
|
if mask is not None:
|
|
symbols = symbols[mask]
|
|
if len(symbols) != len(dataSet):
|
|
raise Exception("Number of symbols does not match number of points (%d != %d)" % (len(symbols), len(dataSet)))
|
|
dataSet['symbol'] = symbols
|
|
else:
|
|
self.opts['symbol'] = symbol
|
|
self._spotPixmap = None
|
|
|
|
dataSet['sourceRect'] = None
|
|
if update:
|
|
self.updateSpots(dataSet)
|
|
|
|
def setSize(self, size, update=True, dataSet=None, mask=None):
|
|
"""Set the size(s) used to draw each spot.
|
|
If a list or array is provided, then the size for each spot will be set separately.
|
|
Otherwise, the argument will be used as the default size for
|
|
all spots which do not have a size explicitly set."""
|
|
if dataSet is None:
|
|
dataSet = self.data
|
|
|
|
if isinstance(size, np.ndarray) or isinstance(size, list):
|
|
sizes = size
|
|
if mask is not None:
|
|
sizes = sizes[mask]
|
|
if len(sizes) != len(dataSet):
|
|
raise Exception("Number of sizes does not match number of points (%d != %d)" % (len(sizes), len(dataSet)))
|
|
dataSet['size'] = sizes
|
|
else:
|
|
self.opts['size'] = size
|
|
self._spotPixmap = None
|
|
|
|
dataSet['sourceRect'] = None
|
|
if update:
|
|
self.updateSpots(dataSet)
|
|
|
|
def setPointData(self, data, dataSet=None, mask=None):
|
|
if dataSet is None:
|
|
dataSet = self.data
|
|
|
|
if isinstance(data, np.ndarray) or isinstance(data, list):
|
|
if mask is not None:
|
|
data = data[mask]
|
|
if len(data) != len(dataSet):
|
|
raise Exception("Length of meta data does not match number of points (%d != %d)" % (len(data), len(dataSet)))
|
|
|
|
## Bug: If data is a numpy record array, then items from that array must be copied to dataSet one at a time.
|
|
## (otherwise they are converted to tuples and thus lose their field names.
|
|
if isinstance(data, np.ndarray) and (data.dtype.fields is not None)and len(data.dtype.fields) > 1:
|
|
for i, rec in enumerate(data):
|
|
dataSet['data'][i] = rec
|
|
else:
|
|
dataSet['data'] = data
|
|
|
|
def setPxMode(self, mode):
|
|
if self.opts['pxMode'] == mode:
|
|
return
|
|
|
|
self.opts['pxMode'] = mode
|
|
self.invalidate()
|
|
|
|
def updateSpots(self, dataSet=None):
|
|
if dataSet is None:
|
|
dataSet = self.data
|
|
|
|
invalidate = False
|
|
if self.opts['pxMode']:
|
|
mask = np.equal(dataSet['sourceRect'], None)
|
|
if np.any(mask):
|
|
invalidate = True
|
|
opts = self.getSpotOpts(dataSet[mask])
|
|
sourceRect = self.fragmentAtlas.getSymbolCoords(opts)
|
|
dataSet['sourceRect'][mask] = sourceRect
|
|
|
|
self.fragmentAtlas.getAtlas() # generate atlas so source widths are available.
|
|
|
|
dataSet['width'] = np.array(list(imap(QtCore.QRectF.width, dataSet['sourceRect'])))/2
|
|
dataSet['targetRect'] = None
|
|
self._maxSpotPxWidth = self.fragmentAtlas.max_width
|
|
else:
|
|
self._maxSpotWidth = 0
|
|
self._maxSpotPxWidth = 0
|
|
self.measureSpotSizes(dataSet)
|
|
|
|
if invalidate:
|
|
self.invalidate()
|
|
|
|
def getSpotOpts(self, recs, scale=1.0):
|
|
if recs.ndim == 0:
|
|
rec = recs
|
|
symbol = rec['symbol']
|
|
if symbol is None:
|
|
symbol = self.opts['symbol']
|
|
size = rec['size']
|
|
if size < 0:
|
|
size = self.opts['size']
|
|
pen = rec['pen']
|
|
if pen is None:
|
|
pen = self.opts['pen']
|
|
brush = rec['brush']
|
|
if brush is None:
|
|
brush = self.opts['brush']
|
|
return (symbol, size*scale, fn.mkPen(pen), fn.mkBrush(brush))
|
|
else:
|
|
recs = recs.copy()
|
|
recs['symbol'][np.equal(recs['symbol'], None)] = self.opts['symbol']
|
|
recs['size'][np.equal(recs['size'], -1)] = self.opts['size']
|
|
recs['size'] *= scale
|
|
recs['pen'][np.equal(recs['pen'], None)] = fn.mkPen(self.opts['pen'])
|
|
recs['brush'][np.equal(recs['brush'], None)] = fn.mkBrush(self.opts['brush'])
|
|
return recs
|
|
|
|
|
|
|
|
def measureSpotSizes(self, dataSet):
|
|
for rec in dataSet:
|
|
## keep track of the maximum spot size and pixel size
|
|
symbol, size, pen, brush = self.getSpotOpts(rec)
|
|
width = 0
|
|
pxWidth = 0
|
|
if self.opts['pxMode']:
|
|
pxWidth = size + pen.widthF()
|
|
else:
|
|
width = size
|
|
if pen.isCosmetic():
|
|
pxWidth += pen.widthF()
|
|
else:
|
|
width += pen.widthF()
|
|
self._maxSpotWidth = max(self._maxSpotWidth, width)
|
|
self._maxSpotPxWidth = max(self._maxSpotPxWidth, pxWidth)
|
|
self.bounds = [None, None]
|
|
|
|
|
|
def clear(self):
|
|
"""Remove all spots from the scatter plot"""
|
|
#self.clearItems()
|
|
self.data = np.empty(0, dtype=self.data.dtype)
|
|
self.bounds = [None, None]
|
|
self.invalidate()
|
|
|
|
def dataBounds(self, ax, frac=1.0, orthoRange=None):
|
|
if frac >= 1.0 and orthoRange is None and self.bounds[ax] is not None:
|
|
return self.bounds[ax]
|
|
|
|
#self.prepareGeometryChange()
|
|
if self.data is None or len(self.data) == 0:
|
|
return (None, None)
|
|
|
|
if ax == 0:
|
|
d = self.data['x']
|
|
d2 = self.data['y']
|
|
elif ax == 1:
|
|
d = self.data['y']
|
|
d2 = self.data['x']
|
|
|
|
if orthoRange is not None:
|
|
mask = (d2 >= orthoRange[0]) * (d2 <= orthoRange[1])
|
|
d = d[mask]
|
|
d2 = d2[mask]
|
|
|
|
if frac >= 1.0:
|
|
self.bounds[ax] = (np.nanmin(d) - self._maxSpotWidth*0.7072, np.nanmax(d) + self._maxSpotWidth*0.7072)
|
|
return self.bounds[ax]
|
|
elif frac <= 0.0:
|
|
raise Exception("Value for parameter 'frac' must be > 0. (got %s)" % str(frac))
|
|
else:
|
|
mask = np.isfinite(d)
|
|
d = d[mask]
|
|
return np.percentile(d, [50 * (1 - frac), 50 * (1 + frac)])
|
|
|
|
def pixelPadding(self):
|
|
return self._maxSpotPxWidth*0.7072
|
|
|
|
def boundingRect(self):
|
|
(xmn, xmx) = self.dataBounds(ax=0)
|
|
(ymn, ymx) = self.dataBounds(ax=1)
|
|
if xmn is None or xmx is None:
|
|
xmn = 0
|
|
xmx = 0
|
|
if ymn is None or ymx is None:
|
|
ymn = 0
|
|
ymx = 0
|
|
|
|
px = py = 0.0
|
|
pxPad = self.pixelPadding()
|
|
if pxPad > 0:
|
|
# determine length of pixel in local x, y directions
|
|
px, py = self.pixelVectors()
|
|
try:
|
|
px = 0 if px is None else px.length()
|
|
except OverflowError:
|
|
px = 0
|
|
try:
|
|
py = 0 if py is None else py.length()
|
|
except OverflowError:
|
|
py = 0
|
|
|
|
# return bounds expanded by pixel size
|
|
px *= pxPad
|
|
py *= pxPad
|
|
return QtCore.QRectF(xmn-px, ymn-py, (2*px)+xmx-xmn, (2*py)+ymx-ymn)
|
|
|
|
def viewTransformChanged(self):
|
|
self.prepareGeometryChange()
|
|
GraphicsObject.viewTransformChanged(self)
|
|
self.bounds = [None, None]
|
|
self.data['targetRect'] = None
|
|
|
|
def setExportMode(self, *args, **kwds):
|
|
GraphicsObject.setExportMode(self, *args, **kwds)
|
|
self.invalidate()
|
|
|
|
|
|
def mapPointsToDevice(self, pts):
|
|
# Map point locations to device
|
|
tr = self.deviceTransform()
|
|
if tr is None:
|
|
return None
|
|
|
|
#pts = np.empty((2,len(self.data['x'])))
|
|
#pts[0] = self.data['x']
|
|
#pts[1] = self.data['y']
|
|
pts = fn.transformCoordinates(tr, pts)
|
|
pts -= self.data['width']
|
|
pts = np.clip(pts, -2**30, 2**30) ## prevent Qt segmentation fault.
|
|
|
|
return pts
|
|
|
|
def getViewMask(self, pts):
|
|
# Return bool mask indicating all points that are within viewbox
|
|
# pts is expressed in *device coordiantes*
|
|
vb = self.getViewBox()
|
|
if vb is None:
|
|
return None
|
|
viewBounds = vb.mapRectToDevice(vb.boundingRect())
|
|
w = self.data['width']
|
|
mask = ((pts[0] + w > viewBounds.left()) &
|
|
(pts[0] - w < viewBounds.right()) &
|
|
(pts[1] + w > viewBounds.top()) &
|
|
(pts[1] - w < viewBounds.bottom())) ## remove out of view points
|
|
return mask
|
|
|
|
|
|
@debug.warnOnException ## raising an exception here causes crash
|
|
def paint(self, p, *args):
|
|
|
|
#p.setPen(fn.mkPen('r'))
|
|
#p.drawRect(self.boundingRect())
|
|
|
|
if self._exportOpts is not False:
|
|
aa = self._exportOpts.get('antialias', True)
|
|
scale = self._exportOpts.get('resolutionScale', 1.0) ## exporting to image; pixel resolution may have changed
|
|
else:
|
|
aa = self.opts['antialias']
|
|
scale = 1.0
|
|
|
|
if self.opts['pxMode'] is True:
|
|
p.resetTransform()
|
|
|
|
# Map point coordinates to device
|
|
pts = np.vstack([self.data['x'], self.data['y']])
|
|
pts = self.mapPointsToDevice(pts)
|
|
if pts is None:
|
|
return
|
|
|
|
# Cull points that are outside view
|
|
viewMask = self.getViewMask(pts)
|
|
#pts = pts[:,mask]
|
|
#data = self.data[mask]
|
|
|
|
if self.opts['useCache'] and self._exportOpts is False:
|
|
# Draw symbols from pre-rendered atlas
|
|
atlas = self.fragmentAtlas.getAtlas()
|
|
|
|
# Update targetRects if necessary
|
|
updateMask = viewMask & np.equal(self.data['targetRect'], None)
|
|
if np.any(updateMask):
|
|
updatePts = pts[:,updateMask]
|
|
width = self.data[updateMask]['width']*2
|
|
self.data['targetRect'][updateMask] = list(imap(QtCore.QRectF, updatePts[0,:], updatePts[1,:], width, width))
|
|
|
|
data = self.data[viewMask]
|
|
if USE_PYSIDE:
|
|
list(imap(p.drawPixmap, data['targetRect'], repeat(atlas), data['sourceRect']))
|
|
else:
|
|
p.drawPixmapFragments(data['targetRect'].tolist(), data['sourceRect'].tolist(), atlas)
|
|
else:
|
|
# render each symbol individually
|
|
p.setRenderHint(p.Antialiasing, aa)
|
|
|
|
data = self.data[viewMask]
|
|
pts = pts[:,viewMask]
|
|
for i, rec in enumerate(data):
|
|
p.resetTransform()
|
|
p.translate(pts[0,i] + rec['width'], pts[1,i] + rec['width'])
|
|
drawSymbol(p, *self.getSpotOpts(rec, scale))
|
|
else:
|
|
if self.picture is None:
|
|
self.picture = QtGui.QPicture()
|
|
p2 = QtGui.QPainter(self.picture)
|
|
for rec in self.data:
|
|
if scale != 1.0:
|
|
rec = rec.copy()
|
|
rec['size'] *= scale
|
|
p2.resetTransform()
|
|
p2.translate(rec['x'], rec['y'])
|
|
drawSymbol(p2, *self.getSpotOpts(rec, scale))
|
|
p2.end()
|
|
|
|
p.setRenderHint(p.Antialiasing, aa)
|
|
self.picture.play(p)
|
|
|
|
def points(self):
|
|
for rec in self.data:
|
|
if rec['item'] is None:
|
|
rec['item'] = SpotItem(rec, self)
|
|
return self.data['item']
|
|
|
|
def pointsAt(self, pos):
|
|
x = pos.x()
|
|
y = pos.y()
|
|
pw = self.pixelWidth()
|
|
ph = self.pixelHeight()
|
|
pts = []
|
|
for s in self.points():
|
|
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[::-1]
|
|
|
|
|
|
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(object):
|
|
"""
|
|
Class referring to individual spots in a scatter plot.
|
|
These can be retrieved by calling ScatterPlotItem.points() or
|
|
by connecting to the ScatterPlotItem's click signals.
|
|
"""
|
|
|
|
def __init__(self, data, plot):
|
|
#GraphicsItem.__init__(self, register=False)
|
|
self._data = data
|
|
self._plot = plot
|
|
#self.setParentItem(plot)
|
|
#self.setPos(QtCore.QPointF(data['x'], data['y']))
|
|
#self.updateItem()
|
|
|
|
def data(self):
|
|
"""Return the user data associated with this spot."""
|
|
return self._data['data']
|
|
|
|
def size(self):
|
|
"""Return the size of this spot.
|
|
If the spot has no explicit size set, then return the ScatterPlotItem's default size instead."""
|
|
if self._data['size'] == -1:
|
|
return self._plot.opts['size']
|
|
else:
|
|
return self._data['size']
|
|
|
|
def pos(self):
|
|
return Point(self._data['x'], self._data['y'])
|
|
|
|
def viewPos(self):
|
|
return self._plot.mapToView(self.pos())
|
|
|
|
def setSize(self, size):
|
|
"""Set the size of this spot.
|
|
If the size is set to -1, then the ScatterPlotItem's default size
|
|
will be used instead."""
|
|
self._data['size'] = size
|
|
self.updateItem()
|
|
|
|
def symbol(self):
|
|
"""Return the symbol of this spot.
|
|
If the spot has no explicit symbol set, then return the ScatterPlotItem's default symbol instead.
|
|
"""
|
|
symbol = self._data['symbol']
|
|
if symbol is None:
|
|
symbol = self._plot.opts['symbol']
|
|
try:
|
|
n = int(symbol)
|
|
symbol = list(Symbols.keys())[n % len(Symbols)]
|
|
except:
|
|
pass
|
|
return symbol
|
|
|
|
def setSymbol(self, symbol):
|
|
"""Set the symbol for this spot.
|
|
If the symbol is set to '', then the ScatterPlotItem's default symbol will be used instead."""
|
|
self._data['symbol'] = symbol
|
|
self.updateItem()
|
|
|
|
def pen(self):
|
|
pen = self._data['pen']
|
|
if pen is None:
|
|
pen = self._plot.opts['pen']
|
|
return fn.mkPen(pen)
|
|
|
|
def setPen(self, *args, **kargs):
|
|
"""Set the outline pen for this spot"""
|
|
pen = fn.mkPen(*args, **kargs)
|
|
self._data['pen'] = pen
|
|
self.updateItem()
|
|
|
|
def resetPen(self):
|
|
"""Remove the pen set for this spot; the scatter plot's default pen will be used instead."""
|
|
self._data['pen'] = None ## Note this is NOT the same as calling setPen(None)
|
|
self.updateItem()
|
|
|
|
def brush(self):
|
|
brush = self._data['brush']
|
|
if brush is None:
|
|
brush = self._plot.opts['brush']
|
|
return fn.mkBrush(brush)
|
|
|
|
def setBrush(self, *args, **kargs):
|
|
"""Set the fill brush for this spot"""
|
|
brush = fn.mkBrush(*args, **kargs)
|
|
self._data['brush'] = brush
|
|
self.updateItem()
|
|
|
|
def resetBrush(self):
|
|
"""Remove the brush set for this spot; the scatter plot's default brush will be used instead."""
|
|
self._data['brush'] = None ## Note this is NOT the same as calling setBrush(None)
|
|
self.updateItem()
|
|
|
|
def setData(self, data):
|
|
"""Set the user-data associated with this spot"""
|
|
self._data['data'] = data
|
|
|
|
def updateItem(self):
|
|
self._data['sourceRect'] = None
|
|
self._plot.updateSpots(self._data.reshape(1))
|
|
self._plot.invalidate()
|
|
|
|
#class PixmapSpotItem(SpotItem, QtGui.QGraphicsPixmapItem):
|
|
#def __init__(self, data, plot):
|
|
#QtGui.QGraphicsPixmapItem.__init__(self)
|
|
#self.setFlags(self.flags() | self.ItemIgnoresTransformations)
|
|
#SpotItem.__init__(self, data, plot)
|
|
|
|
#def setPixmap(self, pixmap):
|
|
#QtGui.QGraphicsPixmapItem.setPixmap(self, pixmap)
|
|
#self.setOffset(-pixmap.width()/2.+0.5, -pixmap.height()/2.)
|
|
|
|
#def updateItem(self):
|
|
#symbolOpts = (self._data['pen'], self._data['brush'], self._data['size'], self._data['symbol'])
|
|
|
|
### If all symbol options are default, use default pixmap
|
|
#if symbolOpts == (None, None, -1, ''):
|
|
#pixmap = self._plot.defaultSpotPixmap()
|
|
#else:
|
|
#pixmap = makeSymbolPixmap(size=self.size(), pen=self.pen(), brush=self.brush(), symbol=self.symbol())
|
|
#self.setPixmap(pixmap)
|
|
|
|
|
|
#class PathSpotItem(SpotItem, QtGui.QGraphicsPathItem):
|
|
#def __init__(self, data, plot):
|
|
#QtGui.QGraphicsPathItem.__init__(self)
|
|
#SpotItem.__init__(self, data, plot)
|
|
|
|
#def updateItem(self):
|
|
#QtGui.QGraphicsPathItem.setPath(self, Symbols[self.symbol()])
|
|
#QtGui.QGraphicsPathItem.setPen(self, self.pen())
|
|
#QtGui.QGraphicsPathItem.setBrush(self, self.brush())
|
|
#size = self.size()
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#self.resetTransform()
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#self.scale(size, size)
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