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Kevin Ansfield 165b2efac9 Added auto-scroll when dragging gallery images (#1083)
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Adds auto-scroll if the mouse is placed near the top or bottom of the window whilst dragging an image to re-order it within a gallery. Useful when the position you want to drag to is not currently on screen.

- append drop indicator element to `.koenig-editor` element to account for scrolling (also fixes indicator positioning bug with current implementation if you use mouse-wheel or keyboard to scroll the page whilst dragging)
- generalise `getParent` util to accept a 
  - switch to using selectors rather than dataset for finding parent draggable/droppable/container
- add a `ScrollHandler` class that is used by the `koenigDragDropHandler` service to trigger scrolling whilst dragging
2018-12-13 12:17:43 +00:00
ghost/admin Added auto-scroll when dragging gallery images (#1083) 2018-12-13 12:17:43 +00:00