private void GetDragState(ref bool AIsDragTarget, ref Point ADragLocation, DragEventArgs AArgs)
{
ObjectDesignerData LData = AArgs.Data as ObjectDesignerData;
if (LData != null)
{
ObjectSchema LObject = (ObjectSchema)FGrid
[
ClientToGrid(PointToClient(new Point(AArgs.X, AArgs.Y)))
];
if (LObject == null)
{
ADragLocation = ClientToGrid(PointToClient(new Point(AArgs.X, AArgs.Y)));
AIsDragTarget = true;
}
}
}
protected override void OnDragDrop(DragEventArgs AArgs)
{
base.OnDragDrop(AArgs);
SetDragState(false, Point.Empty);
bool LIsDragTarget = false;
Point LDragLocation = Point.Empty;
GetDragState(ref LIsDragTarget, ref LDragLocation, AArgs);
if (LIsDragTarget)
{
ObjectDesignerData LData = AArgs.Data as ObjectDesignerData;
if (LData != null)
{
FGrid[FGrid.GetPosition(LData.Object)] = null;
FGrid[LDragLocation] = LData.Object;
UpdateRange();
UpdateDisplay(true);
UpdateScrollBars();
PerformLayout();
}
}
}