Overlay item background color

[Toni]

Hi everyone.

I have a question to ask about PlotItem and its background customization.

My current situation is:

- I have an ImageItem that shows a stream of images

- An overlayed PlotItem with some stats

- An overlayed TextItem with some stats too

What I would like to do is add a sort of opaque background to the PlotItem and the TextItem to make the graph axes and the writings more readable, something like half transparent white background.

Is it possible?

Here is a little snippet of my current code in the __init__ method, maybe it could help

        QtCore.QObject.__init__(self)

        

        app = QtGui.QApplication([])

        

        # Create window with GraphicsView widget

        win = pg.GraphicsLayoutWidget()

        win.show()  ## show widget alone in its own window

        win.setWindowTitle('Realtime prediction')

                 # Create ViewBox

        self.view = win.addViewBox(enableMouse=False)

        self.view.invertY()

        self.view.setAspectLocked(True)

        

        # Create image item

        self.vis = pg.ImageItem()

        self.view.addItem(self.vis)

        

        # Create obstacle histogram

        plot = pg.PlotItem() # <- background here

        plot.layout.setMinimumWidth(200.0)

        plot.layout.setMinimumHeight(150.0)      

        axesB = plot.getAxis('bottom')

        axesB.setTicks([xdict.items()])

        axesB.setPen((0, 0, 0))

        axesL = plot.getAxis('left')

        axesL.setPen((0, 0, 0))

        plot.setZValue(10)

        plot.setY(320.0)

        plot.setX(220.0)

        self.view.addItem(plot)

        

        self.barGraphItem = pg.BarGraphItem(x = x, height = self.y, width = 1, brush = (255, 0, 0, 128))

        plot.addItem(self.barGraphItem)

        

        self.text = pg.TextItem('Loading...') # <- background here

        self.text.setColor((0.5, 0.5, 0.5))

        self.view.addItem(self.text)

        QtGui.QApplication.instance().exec_()

Thank you in advance for the answers.

Toni.