Export menu window detection

[Gáll Péter]

Hi!

I'm plotting real time data with pyqtgraph and I can pause it with a button in the GUI.

I would like to pause the plotting, when Export menu is clicked from the context menu.

Is there any way to detect that the export menu is opened?

Thanks.

[Patrick]

Hi,

Not sure if this is the cleanest way to do it, but you can connect to the GraphicsScene menu item signal, something like:

class TestPlot(pg.GraphicsLayoutWidget):
    def __init__(self):
        # ... usual init stuff
        self.ci.scene().contextMenu[0].triggered.connect(self.export_clicked)

    def export_clicked(self):
       print("Export")

Note, ci is the central item (a GraphicsLayout) in the GraphicsLayoutWidget. The scene() method gets the associated GraphicsScene. If you're not using a GraphicsLayoutWidget then finding the GraphicsScene might be a little different.

Patrick

[Gáll Péter]

Thanks, it worked for me. I'm using pg.Plotwidget(), so I get the signal like that:

self.power_graph.sceneObj.contextMenu[0].triggered.connect(self.export_clicked)

Is there a signal that detects closing the window too? I tried contextMenu[0].detroyed, but is did not work.

Peter

[Carlos Pascual]

Assuming the context menu is a QMenu, then you have the `aboutToHide` signal:
https://doc.qt.io/qt-5/qmenu.html#signals

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Carlos Pascual Izarra
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