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Exporting Image of the widget in pyqtgraph

I am creating a GraphicsLayoutWidget and then using addPlot() to add plots to the widget. This widget is not displayed on the screen but used to export image by using:

    exporter = pyqtgraph.exporters.ImageExporter(pwidget.scene())
    exporter.export(os.path.join(datadirtemp, str(typename) + '.png'))

But the images are never covering the whole plot.

Also, using the below item does not help:

exporter.parameters()['width'] = pwidget.scene().sceneRect().width()

I get the following error:

Cannot export image with size=0 (requested export size is 0x0)
Solution

  • You are trying to export the window before it is initialized. So you need to do

    QtGui.QApplication.processEvents()

    before exporting it.

    Refer to the link: from pyqtgraph's forum