feat: natively handle drag and drop from outside #707
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* feat: Centering the dropping placeholder on the cursor * Removing unnecessary * Mutualizing width and height getter function Co-authored-by: Corentin Pillet <corentin.pillet@energiency.com>
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Hi, this PR implements drag & drop from outside, directly in the library.
While I was trying to experiment such feature, I noticed that the related example contained a lot of custom code to make it work. It's not very easy, and not persistent since it relies on internal interfaces (
$refs, internal/private methods).So I modestly propose this feature:
is-droppablesays whether the grid can accept drag from outside (i.e native draggable elements)before-drop-overis a callback function used to eventually abort dragover events, or dynamically adapt the size of dragging itemsdropis emitted when dropping an elementAbout the implementation, in order to handle the drag events in the
GridLayoutcomponent, I movedcalcXYandcalcGridColWidthmethods in acalculateUtilsfile in order to expose them (I was inspired by the React Grid Layout library for namings). This allows to not rely onGridIteminternal methods.I also moved the placeholder update, may fix #544.