sf-dragndrop

A drag and drop module enabling drag and drop without modifying your model letting your controller responsible of the model changes.

Here is a sample usage you can play with.

Setting a dragable item (sfDrag directive)

<ANY sf-drag="myModelDraggableValue"
  sf-drag-type="myDragFamily"
  sf-draggable="isDraggable($item)"
  sf-on-drag="onDragCallback($type, $item, $session)"
  sf-drag-generator="spawnDraggedItem($item)"
  sf-on-drag-end="onDragEndCallback($type, $item, $itemIndex, $target, $targetIndex, $session)"
  sf-drag-effect="none|copy|move|link|copyMove|copyLink|all">

sf-drag

The name of the $scope value on wich the draggable element is based. Behind any draggable element there must be a value in the parent scope attached.

sf-draggable

Expression to allow to disable or enable the draggable ability of an element.

sf-drag-type

The type of the dragged object. This allows to use nested element drag and drop to simply work as expected.

sf-drag-generator

The name of the $scope function that will generate the value on wich the draggable element is based. On each drag, this function will be called and receive the sf-drag resolved value. The returned result will then be used as the value associated with the dragged item.

sf-on-drag

The callback in the parent $scope that will be executed on drag. It will take in argument the sf-drag value ($item parameter) and the type of drag ($type).

If for any reason, you do not want the object to be dragged, return -1. In any other case, you can provide a value, or not.

The returned value will be brought to you in each other callback under the itemIndex name. It can be useful to provide the start index of an item in a list in order to live move it and then put it back in its old place when the drag finally fails.

sf-on-drag-end

The callback in the parent controller that will be executed on drag end. It will take in argument the sf-drag value ($item parameter), the eventual targetted value ($target parameter, see sf-drop above), the sf-on-drag returned value ($targetIndex parameter) and the type of drag ($type).

sf-drag-effect

Set the type of effect the drag allows, see MDN documentation for more informations.

sf-drag-data

Allow to provide datas for the drag operation, defaults to the item index. It may be usefull if your dragged item is a blog post but you want the user to be able to drag it to the address bar. The Plunker given above illustrate this ability.

Read this article to view which drag types make sense for Browser/OS level interactions.

sf-drag-mime

Specify the MIME type of above datas, defaults to 'text/plain'.

Setting a drop target (sfDrop directive)

<ANY sf-drop="myModelDropableValue"
  sf-drag-type="myDragFamily"
  sf-on-drag-enter="onDragEnterCallback($type, $item, $itemIndex, $target, $targetIndex, $session)"
  sf-on-drag-leave="onDragLeaveCallback($type, $item, $itemIndex, $previous, $previousIndex, $session)"
  sf-on-drop="onDropCallback($type, $item, $itemIndex, $target, $targetIndex, $session)">

sf-drop

The name of the $scope value on wich the drop target element is based.

sf-drag-type

The type of the dragged object it can receive.

sf-on-drag-enter

The callback in the parent $scope that will be executed when a valid draggable element will enter on the target element. It will take in argument the sf-drag value ($item parameter), the targetted value ($target parameter, see sf-drop above), the sf-on-drag returned value ($targetIndex parameter) and the type of drag ($type).

sf-on-drag-leave

The callback in the parent $scope that will be executed when a valid draggable element will exit on the target element. It will take in argument the sf-drag value ($item parameter), the targetted value ($target parameter, see sf-drop above), the sf-on-drag returned value ($targetIndex parameter) and the type of drag ($type).

sf-on-drop

The callback in the parent controller that will be executed on drop. It will take in argument the sf-drag value ($item parameter), the eventual targetted value ($target parameter, see sf-drop above), the sf-on-drag returned value ($targetIndex parameter) and the type of drag ($type).

## sfDragNDropService

This module internally uses a service in order to store drag and drop sessions. It can be usefull to access it from your controllers like it is done in the sample drag and drop implementation given above.

sfDragNDropService.session:Object

An object containing drag and drop session properties. Your can add some by your own but you should never erase the sfDragNDropService.session reference without knowing what you're doing.

sfDragNDropService.reset()

Allow to reset the drag and drop session.

Contribute

To contribute to this project, first run the following to setup the development environment:

npm install
bower install

Then, run the tests and debug with Karma:

npm run dev

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