Question about drawing background images in a QGraphicsScene and QGraphicsView

[di_zou]

I have a QGraphicsScene and a QGraphicsView. I am currently using the QGraphicsView to draw a backgorund image. I have reimplemented the QGraphicsView::drawBackground() function like this:

def drawBackground(self, painter, rect):
        sceneRect = self.sceneRect()
        if self.background:
            rectf = QRectF(self.background.rect())
            painter.drawPixmap(sceneRect, self.background, rectf)
        else:
            painter.fillRect(rect.intersect(sceneRect), QBrush(Qt.lightGray))
            painter.setBrush(Qt.NoBrush)
            painter.drawRect(sceneRect)

def drawBackground(self, painter, rect):
        sceneRect = self.sceneRect()
        if self.background:
            rectf = QRectF(self.background.rect())
            painter.drawPixmap(sceneRect, self.background, rectf)
        else:
            painter.fillRect(rect.intersect(sceneRect), QBrush(Qt.lightGray))
            painter.setBrush(Qt.NoBrush)
            painter.drawRect(sceneRect)

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self.background is a QPixmap:

self.background = QPixmap(':/some_image.png')

self.background = QPixmap(':/some_image.png')

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The problem with this is that if the PNG is not in my .qrc file, the background image does not show up. I would like to make it so that I can use any image I want without having to put it into the .qrc. How would I do this?

I took a look at QGraphicsScene::drawBackground() which requires a QPainter as a parameter. However, I am not sure of how to tell the QPainter which image to use.