Event handler signalled when an object is dropped onto the control.
Source position: controls.pp line 1560
protected property TControl.OnDragDrop : TDragDropEvent |
OnDragDrop is a TDragDropEvent property with the event handler signalled when another control is dropped onto the control instance. Unlike with drag-dock, a default action is not associated with the drag-drop operation. The OnDragDrop handler is the only way to do something meaningful for the drag-drop operation.
The Sender argument contains the current control instance (Self) for for the event.
The Source argument is the object (TControl) which is droppped onto the current control instance.
X and Y contains the control-relative coordinates for the mouse pointer when the event occurred.
OnDragDrop is signalled from the DragDrop method, and occurs when dmDragDrop messages (TDragMessage) are handled for the control.
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Signals the OnDragDrop handler when a dragged object is dropped onto this control. |
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The type of an OnDragDrop notification handler. |
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Message types used in DragManager. |
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