ENTRY OnDragEnter(IN INT _refId, OUT BOOL _bAllow)
; akcie
END OnDragEnter
Parameters
_refId
For global handler - identifier of target graphic object.
_bAllow
Defines whether a graphic object is able to process Drop
operation.
Description
Picture event is generated over a target graphic object when
a user moves the mouse cursor on it for the first time during Drag
operation.
There must be determined whether the target graphic object is able to
process Drop operation.
This can be done globally, if the graphic object cannot take a role of the
target object, or based on the format of transferred data. The format can be
get by the function %IsDragData.
If the data format is suitable for processing in the graphic object, the
target object should enable Drop operation
through the parameter _bAllow. Based on this value, a mouse cursor
icon, which indicates the possible completion of Drop operation, will be
set.
Example
ENTRY OnDragEnter (IN INT _refID, OUT BOOL _bAllow)
; test on admissibility of target object
_bAllow := @FALSE
; what type of data I have? I can work only with a text
IF %IsDragData(0, _DF_TEXT) THEN
_bAllow := @TRUE
END IF
END OnDragEnter
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