Create custom scatterplotitem symbol beside letters

[Friedrich Dinsel]

hi :-)

i am trying to create my own symbol for a scatterplotitem but can't get it to work. i have tried a few ways described in the documentation and several (well.. there are not that many) examples in the web. from my understanding in the docu i can pass a created QPainterPath to the symbol argument of ScatterPlotItem.. like this:

class Symbols():
    # something like a bowtie
    valves = np.asarray([
                [0.4330127, 0.25],
                [0.4330127, -0.25],
                [-0.4330127, 0.25],
                [-0.4330127, -0.25],
                [0.4330127, 0.25]
                ])

    valve = pg.arrayToQPath(valves[:, 0], valves[:, 1], connect='all')
    # >>> <class 'PyQt5.QtGui.QPainterPath'>



class Show()

# stuff here..

def _showMeSomething(self):
    valve_symbols = ScatterPlotItem(
                size=20,
                pen=pg.mkPen(0, 0, 0, 255),
                brush=pg.mkBrush(224, 76, 2, 255),
                # symbol='t',
                symbol=Symbols.valve
                )
    spots = ...
    valve_symbols.addPoints(spots)
    figure.add(valve_symbols)

at the point of addPoints i get the following error:
  File "venv3/lib/python3.5/site-packages/pyqtgraph/graphicsItems/ScatterPlotItem.py", line 409, in addPoints
    self.updateSpots(newData)
  File "venv3/lib/python3.5/site-packages/pyqtgraph/graphicsItems/ScatterPlotItem.py", line 559, in updateSpots
    sourceRect = self.fragmentAtlas.getSymbolCoords(opts)
  File "venv3/lib/python3.5/site-packages/pyqtgraph/graphicsItems/ScatterPlotItem.py", line 134, in getSymbolCoords
    sourceRect[i] = self.symbolMap[key]
  File "venv3/lib/python3.5/weakref.py", line 131, in __getitem__
    o = self.data[key]()
TypeError: unhashable type: 'QPainterPath'

could someone help me with that? o.O if a MWE should be necessary i think i can break that down :-)

cheers in advance
friedrich

[Mikhail Terekhov]

It is fixed in the develop branch now. :)

regards

[Friedrich Dinsel]

It is fixed in the develop branch now. :)

sweet! thank you very much!!