very hard to reload QML Image

I have a Image element in my QML, and I use my own ImageProvider as the source, my ImageProvider is a plugin.

Image

{ Id: foregroundImage Source: "image://ownimageprovider/foreground sourceSize.width: mainWidget.imageWidth }

My ownimageprovider generate dynamic QImage for Image element, but I don't know how to reload image when image is changed.

I tried to use a stupid way to do: add sourceSize.width property. When I know image is changed from my c++ code, I emit "imageWidthChanged" signal(by increase image width to 1, or minus 1, human cannot see the difference if image size is changed 1 pixel), then image is reloaded. But this solution is not working all the time, only work in some times.

Is there better and robust solution for this?

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Lam Bea's solution:

There is no straightforward way to do this at the moment. The only way to force a reload would be to modify the image url to ensure a new image is requested from the image provider - for example, by appending some unique number that then is ignored by the image provider.