Expose absolute coordinates of widgets on contentview

Currently laid out widget coordinates relative to its parent are exposed by the bounds property. Access to absolute position of a widget on the screen may be useful for advanced animations.

Use case example: scroll view with complex layout. Goal: pop-up animation, scaling an arbitrary scroll view child widget to fit the screen (e.g. modal image details view with a fluid animation). Implementation suggestion:

1. get the absolute coordinates of the widget.
2. create a second twin widget and append it to the page using the absolute coordinates from (1).
3. set visible of the first widget to false.
4. animate the widget from (2).

Currently (1) is only possible by manually calculating the absolute coordinates of the widget (not easy with complex layouts) respecting the current scroll position.

[mpost]

Negative bounds have never been supported on Android. We added clarified this in the documentation accordingly. The idea to get the view bounds is still valid though. For the moment you could traverse up the view hierarchy in a resize callback and add up the top/left coordinates.

[mpost]

@cookieguru Thanks for the heads up. Closing as resolved.