OnDrop event

Declaration
 ENTRY OnDrop(IN INT _refId)
 ; actions
 END OnDrop

Parameters
_refId Reference variable of target object.

Description
Picture event is generated when a user moves data to the given target graphic object. Within event handling, there is necessary to get a required data and following them to modify the content of graphic object. First, there must be detected what type of data format was transferred by %IsDragData function and following it to get data in the appropriate format through these functions: To define a position for placing the new data in a target object, use these functions: Based on these data, it is necessary to modify the target graphic object to reflect the executed Drop operation.
Example
 ENTRY OnDrop (IN INT _refID)
 IF %IsDragData(0, _CF_TEXT) THEN
 TEXT _dndText
 ; getting a text
 _dndText := %GetDragDataText(0)
 
 ; finding out a position in the tree
 _tmp := %HI_TVQueryDnDItem(_refId,_node1,_node2)
 
 ; setting a new item in the tree
 CALL AddTreeItem(_refId, _dndText, _node1, _node2)
 ENDIF
 END OnDrop

Related pages:

ENTRY - picture event handler
Active picture events

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