BoxSelect Multi-Select Should Target All Draw Features

Noticed what maybe a bug in regards to boxSelect. Using the box selection for a multi-select only targets rendered features. Thus small features on a lower zoom level will not be targeted.

Tested on:

• mapbox-gl-js version 0.35.0 and mapbox-gl-draw version 0.17.2
• Current CDNs

To Trigger Behavior: (Random fiddle space)

1. Create a small polygon, this should be about the size of a city block.
2. Create a second larger polygon, say the size of a state around the small polygon.
3. Zoom out until the second polygon is no longer visible.
4. Use a box selection over the entire larger polygon.

Expected Behavior:

You would expect all draw features within the box selection to be selected. Regardless of render state.

Actual Behavior:

Only the visible features are selected. Thus is you perform a drag after the selection occurs, the smaller feature will remain within it’s original location as it is not selected.

Start with the linked JSFiddle and trace the boxSelect multi-select entry point in mapbox-gl-draw. Reproduce the zoomed-out case, then inspect how selection is limited to rendered features. Done means all draw features inside the box are selected, including those not visible at the current zoom.