Is there a way to 'lock' the overview map in OpenLayers 3 using a fixed extent?
The current implementation resizes the little rectangle and the map. So when I zoom in or out in my map, the map in the overview map might change as well.
However, I would like the map in the overview map to use a fixed extent, so that it never moves. So when I zoom or pan the map always stays the same and only the rectangle is adjusted.
The Overview Panel in QGIS provides a good example of what I mean.
In the following screenshots I am moving and zooming in QGIS, but my overview map always stays the same and solely the rectangle is adjusted.
I would like to implement that behavior in OpenLayers 3 or 4.