MhDragState class

class to hold the current State of a drag and drop operation

A drag drop operation has different states

dragStart The User wants to drag something this is called on dragSources - e.g. Flutter Draggable You can disallow the drag here
dragMove The User is dragging around something this is called on DragTargets - e.g. Flutter DragTarget You can set the allowed dropModes here also according to the current position
acceptDrop The Users wants to drop something this is called on DragTargets - e.g. Flutter DragTarget Here you can accept the drop or deny it. And you chould create the items to be inserted from the dropped items. E.g.: If you drop items from a List to a TreeView and the TreeView need different items than the list, than you should create a new item from every dragged item
dropAccepted The Drop Target accepted the drop this is called on the DragSource e.g. Flutter Draggeable.onDragEnd Here you can e.g. remove the dragged items from the List if this was a move operation

There are more states, but in most cases you don't need them, so we decided to handle them internally or ignore them

Inheritance

displayText → String: Text to be displayed during a drag and drop operation holding e.g.: Move
no setter
draggedItems ↔ List?: holds a list of items beeing dragged
getter/setter pair
dragSource ↔ MdDragSource?: points to the widget the where the drag operation started and the draggedItems are taken from
getter/setter pair
dropMode ↔ MhDropMode: the current action the user requestet for the drag and drop Operation
getter/setter pair
dropModeAllowed ↔ MhDropModeAllowed: the modes which are allowed for the current drag drop Operation you can limit the allowed drop modes to only copy, only move or do both
getter/setter pair
dropPosition ↔ MhDropPosition?: holds the position where the user wants to drop the draggedItems according to the current Pointer position
getter/setter pair
hashCode → int: The hash code for this object.
no setterinherited
hasListeners → bool: Whether any listeners are currently registered.
no setterinherited
messageToShowDuringDrag ← String?: no getter
messageToShowDuringMove ← String?: no getter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
showDefaultMessages ← bool: no getter

addListener(VoidCallback listener) → void: Register a closure to be called when the object changes.
inherited
dispose() → void: Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void: Call all the registered listeners.
inherited
onDragLeave() → dynamic: function should be called from every DragTarget in the onLeave Event
onDragMove(bool dragAllowed) → dynamic: function should be called from every DragTarget in the move Event
onKeyEvent(KeyEvent event) → void: called from the KeyBoard listener to indicate a key was pressed during the drag drop operation
removeListener(VoidCallback listener) → void: Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
setDisplayText(String value, bool isDefaultMessage) → void: set the text to be displayed close to the cursor during a drag and drop operation
setDragMode() → void: set the current drag Drop Mode according to current Keys Pressed e.g. if the users presses the SHIFT key, the drop Mode is set to move if allowed
toString() → String: A string representation of this object.
inherited