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Called when an object is dragged over this control. Determines whether a drop is acceptable, using the OnDragOver handler.
Source position: controls.pp line 1346
protected procedure TControl.DragOver( |
Source: TObject; |
X: Integer; |
Y: Integer; |
State: TDragState; |
var Accept: Boolean |
); virtual; |
Source |
|
The dragged object, a control or a DragObject. |
X |
|
The mouse position in client coordinates. |
State |
|
State change flag (dsDragEnter, dsDragMove, dsDragLeave). |
Accept |
|
Set to True when a drop is allowed. |
An OnDragOver handler is required, or any drop will be rejected (Accept becomes False).
When an OnDragOver handler is installed, Accept is set to True and can be changed by the handler.
Remark: | Caution: Source can be either a TDragObject, or the dragged control. |
|
Event handler for a control being dragged over this control. |
|
TControl.DockOver |
lazarus-ccr.sourceforge.net |