Limit Viewport

[tobrun]

I have been hearing about the feature that developers want to limit the viewport for the end-user.

Sample use-case:

Create a tourist application for NYC, users are restricted to:

• move the map in NYC area
• only allowed to zoom between 8 - 14 level
• tilt is limited to only 20 degrees.

API:

This will result in exposing a similar API as the old raster API:

• setScrollableAreaLimit() // definition ready
• setMinZoom() // implemented
• setMaxZoom() // implemented
• setMinTilt()
• setMaxTilt()

iOS is currently thinking about implementing #2457, which will work similar to the rotation snap-back animation we currently have at very low zoom levels.

[1ec5]

With the map tilted, does it matter that the user will be able to see beyond the scrollable area limit?

[1ec5]

In other words, should these properties constrain the center point or the viewable bounds? If the latter, there could potentially be a complex interaction between the scrollable area limit, zoom, and tilt constraints.

[friedbunny]

#2341 is one suggested approach, on iOS.

[Zakay]

+1 on setScrollableAreaLimit
At least something like #2341

[daklock]

+1 on limiting scrollview

[s-a-y]

+1 limiting scrollview