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This class makes it easy for applications to provide a drag object (for drag-n-drop or for clipboard) that has several representations of the same data, under different formats.
Instead of creating a specific class for each case (as would otherwise be necessary), you can simply create independent drag objects (e.g. a QImageDrag object and a KURLDrag object), and bundle them together using KMultipleDrag.
Sample code for this:
KMultipleDrag *drag = new KMultipleDrag( parentWidget ); drag->addDragObject( new QImageDrag( someQImage, 0L ) ); drag->addDragObject( KURLDrag::newDrag( someKURL, 0L ) ); drag->drag(); |
Note that the drag objects added to the multiple drag become owned by it. For that reason their parent should be 0L.
| KMultipleDrag ( QWidget *dragSource = 0L, const char *name = 0L )
| KMultipleDrag |
Create a new KMultipleDrag object.
Parameters:
| dragSource | the parent object which is the source of the data, 0 for a parent-less object |
| name | the name of the object, can be 0 |
| void addDragObject ( QDragObject *dragObject )
| addDragObject |
Call this to add each underlying drag object to the multiple drag object. The drag object should not have a parent because the multiple drag object will own it.
Parameters:
| dragObject | the drag object to add. Should have no parent object. |
| QByteArray encodedData ( const char *mime )
| encodedData |
[protected const virtual]
Returns the data of a drag object with that supports the given mime type.
Parameters:
| mime | the mime type to search |
Returns: the data, or a null byte array if not found
| const char* format ( int i )
| format |
[protected const virtual]
Returns the i'th supported format, or 0.
Parameters:
| i | the number of the format to check |
Returns: the format with the number i, or 0 otherwise
| QPtrList<QDragObject> m_dragObjects | m_dragObjects |
[protected]
| QValueList | m_numberFormats |
[protected]
| void virtual_hook ( int id, void* data )
| virtual_hook |
[protected virtual]