There is a Rhino API for Drag&Drop support - CRhinoDropTarget that allows plugin developers to capture drop events. However in Rhino WIP it seem that the layers panel is no longer a drop target
Dragging over the layer panel doesn’t call my SupportDataObject().
Is that feature removed ?
Sorry I missed this.
The Layers panel has been rewritten in scratch.
Rhino 8 Feature: Layers Panel
Rhino WIP Feature: New Layer Visibility Control
Were just in the process of hooking up drag and drop and ironing out some issues.
You can track the progress here:
By the time Rhino 8 ships, this issue would be ironed out.