Interface ISchedulingDragDropBehavior

The interface for drag-drop operation behaviors for the scheduling controls.

Namespace: Telerik.Windows.Controls.Scheduling
Assembly: Telerik.Windows.Scheduling.Core.dll

Syntax

public interface ISchedulingDragDropBehavior

Methods

CanDrop(SchedulingDragDropState)

Gets the value specifying whether the drag operation can be completed, or not.

Declaration
bool CanDrop(SchedulingDragDropState state)
Parameters
SchedulingDragDropState state

DragDropState identifying the current drag operation.
Returns
System.Boolean

True when the drag operation can be finished, otherwise false.
Remarks

This method is called on every mouse move. All properties in the DragDropState are valid.

CanStartDrag(SchedulingDragDropState)

Gets the value specifying whether the drag operation can be started, or not.

Declaration
bool CanStartDrag(SchedulingDragDropState state)
Parameters
SchedulingDragDropState state

DragDropState that provides context for the current operation.
Returns
System.Boolean

True when the drag operation can be started, otherwise false.
Remarks

This method is called only when the drag operation initiated.

CoerceDraggedItems(SchedulingDragDropState)

This method filters the dragged items collection if necessary.

Declaration
IEnumerable CoerceDraggedItems(SchedulingDragDropState state)
Parameters
SchedulingDragDropState state

DragDropState that provides context for the current operation.
Returns
System.Collections.IEnumerable

The filtered dragged items.
Remarks

This method is called immediately before the drag operation starts. Only the Items property of the DragDropState is valid.

DragDropCanceled(SchedulingDragDropState)

When overridden in a derived class cleans up a cancelled drag operation. This method is called only in the context of the drag source control.

Declaration
void DragDropCanceled(SchedulingDragDropState state)
Parameters
SchedulingDragDropState state

DragDropState that provides context for the current operation.
Remarks

This method is called only when the drag operation is cancelled by the user. If this method is called, the source's DragDropCompleted and target's Drop methods are not called.

DragDropCompleted(SchedulingDragDropState, DragDropEffects)

When overridden in a derived class completes the drag operation. This method is called only in the context of the drag source control.

Declaration
void DragDropCompleted(SchedulingDragDropState state, DragDropEffects dragDropEffects)
Parameters
SchedulingDragDropState state

DragDropState that provides context for the current operation.
DragDropEffects dragDropEffects

DragDropEffects with which the drag operation have finished.
Remarks

When the drag source and the drop target are the same control, this method is called after Drop. This method is called only when the drag operation completed successfully. If this method is called, DragDropCanceled is not called.

Drop(SchedulingDragDropState)

When overridden in a derived class completes the drop operation. This method is called only in the context of the drop target control.

Declaration
void Drop(SchedulingDragDropState state)
Parameters
SchedulingDragDropState state

DragDropState that provides context for the current operation.
Remarks

When the drag source and the drop target are the same control, this method is called before DragCompleted.

GetReorderDropPosition(Double)

Gets the drop position for the reorder based on the overlapping value.

Declaration
DropRelativePosition GetReorderDropPosition(double overlappingValue)
Parameters
System.Double overlappingValue

This value indicates how much the dragged item is over the destination item. This value is between 0 and 1.
Returns
DropRelativePosition

Returns DropRelativePosition enum value.

Extension Methods