Apply a custom background to folders

[dsoutw]

• Display a custom background on a folder widget
• Should apply a proper scaling to the image (none / fit width / fit height / ...)

[dsoutw]

Displaying a custom background image is not the problem. The problem is how to apply a given scaling. It seems the that the only way to scale an image properly is to use a ImageView. However, the size of ImageView cannot auto fit the list of shortcut. Therefore, I don't see a easy way to implement this feature.