The drop is about to be performed.
The drop target is given a last chance to change the nature of the drop.
<p>The following fields in the DropTargetEvent apply:
<ul>
<li>(in)widget
<li>(in)time
<li>(in)x
<li>(in)y
<li>(in)dataTypes
<li>(in,out)currentDataType
<li>(in)operations
<li>(in,out)detail
</ul></p>
<p>The application can veto the drop by setting the <code>event.detail</code> field to
<code>DND.DROP_NONE</code>.</p>
<p>The application can change the operation that will be performed by modifying the
<code>detail</code> field but the choice must be one of the values in the
<code>operations</code> field.</p>
<p>The application can also change the type of data being requested by modifying the
<code>currentDataTypes</code> field but the value must be one of the values in the <
code>dataTypes</code> list.</p>
@param event the information associated with the drop accept event
The drop is about to be performed. The drop target is given a last chance to change the nature of the drop.
<p>The following fields in the DropTargetEvent apply: <ul> <li>(in)widget <li>(in)time <li>(in)x <li>(in)y <li>(in)dataTypes <li>(in,out)currentDataType <li>(in)operations <li>(in,out)detail </ul></p>
<p>The application can veto the drop by setting the <code>event.detail</code> field to <code>DND.DROP_NONE</code>.</p>
<p>The application can change the operation that will be performed by modifying the <code>detail</code> field but the choice must be one of the values in the <code>operations</code> field.</p>
<p>The application can also change the type of data being requested by modifying the <code>currentDataTypes</code> field but the value must be one of the values in the < code>dataTypes</code> list.</p>
@param event the information associated with the drop accept event
@see DropTargetEvent