The RadGanttView control has a built-in DragDropBehavior and ResizeBehavior that enable the drag and drop feature of tasks as well as their resizing. This article will show the basic functionalities of the two behaviors.
The DragDropBehavior is responsible for the dragging, dropping and reordering of tasks in the control.
The next figures show the basic operations of the behaviors:
Figure 1. Task drag and drop
Figure 2. Task resizing
Figure 3. Task reorder
The DragDropBehavior is easily customizable, for more information take a look at the following help articles: