import numpy as np
from PySide import QtCore, QtGui
import sys

import pyqtgraph.opengl as gl

num_points = 10
refresh_interval = 1  # ms


class PlotWidget(QtGui.QWidget):

    def __init__(self, parent=None):
        super().__init__(parent)

        # Basic layout setup
        self.viewWidget = gl.GLViewWidget()
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.viewWidget)
        self.setLayout(layout)

        # Create out scatter plot item. Note that this leak only happens with
        # scatter items, not with line or mesh items.
        pos = np.random.rand(num_points, 3)
        self.scatter = gl.GLScatterPlotItem(pos=pos)
        self.viewWidget.addItem(self.scatter)

        # Create and run timer to repeatedly add and remove scatter item.
        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self._add_remove)
        self.timer.start(refresh_interval)

    def _add_remove(self):
        self.viewWidget.addItem(self.scatter)
        self.viewWidget.removeItem(self.scatter)

    def sizeHint(self):
        return QtCore.QSize(800, 800)


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)

    widget = PlotWidget()
    widget.show()

    sys.exit(app.exec_())