private IDropLocation GetDropLocationCore(Point cursor)
{
IDropLocation dropTarget = null;
if (DragManager.DraggedElement.IsElementInSubtree(this))
{
return(null);
}
if (this.ColumnDefinitions.Count == 1 &&
this.RowDefinitions.Count == 1 &&
this.Children.Count == 1 &&
this.Children[0] is ContentPanel &&
(this.Children[0] as ContentPanel).Children.Count == 0)
{
return(null);
}
Tuple <int, PointSituationRelativeToRect, double> columnInfo = GetColumn(cursor);
Tuple <int, PointSituationRelativeToRect, double> rowInfo = GetRow(cursor);
if (rowInfo.Item2 == PointSituationRelativeToRect.Fill &&
(columnInfo.Item2 == PointSituationRelativeToRect.Before || columnInfo.Item2 == PointSituationRelativeToRect.After))
{
Rect rect = new Rect();
rect.X = columnInfo.Item3;
rect.Y = rowInfo.Item3;
rect.Width = Spacing;
rect.Height = rows[rowInfo.Item1];
rect = GetMarkerCoordinates(rect);
dropTarget = new InsertColumnGridDropLocation(
this,
columnInfo.Item1,
rowInfo.Item1,
columnInfo.Item2 == PointSituationRelativeToRect.After,
rect);
return(dropTarget);
}
if (columnInfo.Item2 == PointSituationRelativeToRect.Fill &&
(rowInfo.Item2 == PointSituationRelativeToRect.Before || rowInfo.Item2 == PointSituationRelativeToRect.After))
{
Rect rect = new Rect();
rect.X = columnInfo.Item3;
rect.Y = rowInfo.Item3;
rect.Width = columns[columnInfo.Item1];
rect.Height = Spacing;
rect = GetMarkerCoordinates(rect);
dropTarget = new InsertRowGridDropLocation(
this,
columnInfo.Item1,
rowInfo.Item1,
rowInfo.Item2 == PointSituationRelativeToRect.After,
rect);
return(dropTarget);
}
return(dropTarget);
}
public static void UpdateDropTarget(IDropLocation dropTarget)
{
if (DropTargetInfo != null)
{
DropTargetInfo.HideVisualCues();
}
DropTargetInfo = dropTarget;
if (DropTargetInfo != null)
{
DropTargetInfo.ShowVisualCues();
}
}