DragSession class abstract
Represents a drag session. Allows inspecting local drag data and provides notifications about drag state changes.
Constructors
Properties
-
dragCompleted
→ ValueListenable<
DropOperation?> -
Fired on drag completion. The value will contain drop operation that the
drag finished with.
no setter
-
dragging
→ ValueListenable<
bool> -
Whether the drag session is in progress. False before drag started
and after drag completed.
no setter
- dragStarted → bool
-
True when drag session has started.
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
-
lastScreenLocation
→ ValueListenable<
Offset?> -
Updated when drag session moves. On mobile and web you will only
get notified when moving over application Window.
On desktop platforms the notification covers entire screen.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
getLocalData(
) → Future< List< Object?> ?> -
Returns local data for each of the draggable items in current session.
Will return
nullif drag session not local, not yet active or already completed. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited