UI: drag component #42
Description
Like in browsers, when a drag event starts you can give the UI a visual thing to render at the top and move with the mouse. Either existing component is moved, copied, or a custom one.
Maybe DragEvent has a Start func where you pass all the options for UI to take over. As opposed to using !Cancel.
Bonus: a droppable area demo could render a preview?
Bonus: a constrained dragging area