Using the dragDropSpec attribute
The dragDropSpec attribute specifies the drag and drop information for the part.
You can tear-off the dragDropSpec attribute to access its attributes and events. If the part has a Drag/Drop tab in its Settings window, the drag and drop attributes and events will be added to the part once you have selected either Allow drag or Allow drop in the part's Settings window.
The dragDropSpec attribute has the following attributes for specifying drag and drop information:
canBeDragSource (Boolean)
Specifies whether the part can be the source of a drag operation. The source is where the drag is started.
canBeDragTarget (Boolean)
Specifies whether the part can be the target of a drag operation. The target is the part under the cursor during the drag.
defaultDragOperations (OrderedCollection)
Specifies the following default drag operations for the array of any or all elements, with the first elements having the highest priority:
•XmMOVE
•XmCOPY
•XmLINK
•XmILLEGAL
defaultDropOperations (OrderedCollection)
Specifies the following default drop operations for the array of any or all elements, with the first elements having the highest priority:
•XmMOVE
•XmCOPY
•XmLINK
•XmILLEGAL
dropAcceptableClassList (OrderedCollection)
Specifies a list of classes where instances can be added to the part for a drop operation.
valueHolder
The valueHolder attribute holds the value of the variable or class.
The dragDropSpec attribute has the following drag and drop events, which all pass a callData parameter from which it gets information about the source, target, operation, and emphasis:
dragChanged
Signals to the source that the target or operation of the drag session has changed.
dragCompleteRequested
Signals to the source that the drag session has completed and requests that the source perform any necessary actions for the operation.
dragLeave
Signals to the target that the mouse pointer has left its bounding box during a drag session. You may want to use this for changing the target emphasis.
dragOver
Signals to the target that the mouse pointer is moving over it during a drag session. The target must fill in the vote field of the callData parameter with the operation acceptable with regard to the source items. See the defaultDropOperations attribute for acceptable vote values.
dragSourceCancelled
Signals to the source that the drag operation was cancelled.
dragStartRequested
Signals to the source that the drag session has started. The source items, images and offsets must be filled in the respective fields of the callData parameter.
dragTargetCancelled
Signals to the target that the drag operation was cancelled.
dropped
Signals to the target that the dragged items have been dropped and requests that the target perform any actions necessary for the drop operation.
self
Signals the target that the value of the object itself has changed.
valueHolder
Signals to the part the value of the variable or class.
Last modified date: 01/29/2015