Replace drag_button_always_visible with drag_button_min_opacity
#2
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First of all, really great addon! I'm using it to implement a
MultiVSliderand it's working well!For my use case I wouldn't want the grabbers to fade at all, which the current
drag_button_always_visibledoes not allow.The new
drag_button_min_opacitycovers both previous use cases as well as my new one.I'm not sure how much of a concern backwards compatibility is to this project. It should probably be possible to provide a dummy
drag_button_always_visibleproperty that simply setsdrag_button_min_opacityto one of the previous constant values.