pyqtgraph/tests/graphicsItems/test_ScatterPlotItem.py

from pyqtgraph.Qt import QtGui, QtCore
import pyqtgraph as pg
import numpy as np


def test_scatterplotitem():
    app = pg.mkQApp()

    plot = pg.PlotWidget()
    # set view range equal to its bounding rect.
    # This causes plots to look the same regardless of pxMode.
    plot.setRange(rect=plot.boundingRect())

    # test SymbolAtlas accepts custom symbol
    s = pg.ScatterPlotItem(name="Scatter")
    symbol = QtGui.QPainterPath()
    symbol.addEllipse(QtCore.QRectF(-0.5, -0.5, 1, 1))
    s.addPoints([{'pos': [0, 0], 'data': 1, 'symbol': symbol}])

    assert s.name() == "Scatter"

    for i, pxMode in enumerate([True, False]):
        for j, useCache in enumerate([True, False]):
            s = pg.ScatterPlotItem()
            s.opts['useCache'] = useCache
            plot.addItem(s)
            s.setData(x=np.array([10, 40, 20, 30]) + i * 100,
                      y=np.array([40, 60, 10, 30]) + j * 100, pxMode=pxMode,
                      name="MoreScatter")
            s.addPoints(x=np.array([60, 70]) + i * 100,
                        y=np.array([60, 70]) + j * 100, size=[20, 30])

            assert s.name() == "MoreScatter"
            # Test uniform spot updates
            s.setSize(10)
            s.setBrush('r')
            s.setPen('g')
            s.setSymbol('+')
            app.processEvents()

            # Test list spot updates
            s.setSize([10] * 6)
            s.setBrush([pg.mkBrush('r')] * 6)
            s.setPen([pg.mkPen('g')] * 6)
            s.setSymbol(['+'] * 6)
            s.setPointData([s] * 6)
            app.processEvents()

            # Test array spot updates
            s.setSize(np.array([10] * 6))
            s.setBrush(np.array([pg.mkBrush('r')] * 6))
            s.setPen(np.array([pg.mkPen('g')] * 6))
            s.setSymbol(np.array(['+'] * 6))
            s.setPointData(np.array([s] * 6))
            app.processEvents()

            # Test per-spot updates
            spot = s.points()[0]
            spot.setSize(20)
            spot.setBrush('b')
            spot.setPen('g')
            spot.setSymbol('o')
            spot.setData(None)
            app.processEvents()

    plot.clear()


def test_init_spots():
    app = pg.mkQApp()
    plot = pg.PlotWidget()
    # set view range equal to its bounding rect.
    # This causes plots to look the same regardless of pxMode.
    plot.setRange(rect=plot.boundingRect())
    spots = [
        {'x': 0, 'y': 1},
        {'pos': (1, 2), 'pen': None, 'brush': None, 'data': 'zzz'},
    ]
    s = pg.ScatterPlotItem(spots=spots)

    # Check we can display without errors
    plot.addItem(s)
    app.processEvents()
    plot.clear()

    # check data is correct
    spots = s.points()

    defPen = pg.mkPen(pg.getConfigOption('foreground'))

    assert spots[0].pos().x() == 0
    assert spots[0].pos().y() == 1
    assert spots[0].pen() == defPen
    assert spots[0].data() is None

    assert spots[1].pos().x() == 1
    assert spots[1].pos().y() == 2
    assert spots[1].pen() == pg.mkPen(None)
    assert spots[1].brush() == pg.mkBrush(None)
    assert spots[1].data() == 'zzz'
    plot.close()