private static bool TryHitTestCell( ColumnManagerCell cell, Point point, UIElement dragContainer )
{
Row parentRow = cell.ParentRow;
if( parentRow == null )
return true;
FixedCellPanel fixedCellPanel = parentRow.CellsHostPanel as FixedCellPanel;
if( fixedCellPanel == null )
return true;
Decorator scrollingCellsDecorator = fixedCellPanel.ScrollingCellsDecorator;
if( !scrollingCellsDecorator.IsAncestorOf( cell ) )
return true;
Point cellPoint = cell.TranslatePoint( ColumnReorderingDragSourceManager.EmptyPoint, dragContainer );
Rect cellRect = new Rect( cellPoint.X, cellPoint.Y, cell.ActualWidth, cell.ActualHeight );
Point scrollingCellsDecoratorPoint = scrollingCellsDecorator.TranslatePoint( ColumnReorderingDragSourceManager.EmptyPoint, dragContainer );
Rect scrollingCellsDecoratorRect = new Rect( scrollingCellsDecoratorPoint.X, scrollingCellsDecoratorPoint.Y, scrollingCellsDecorator.ActualWidth, scrollingCellsDecorator.ActualHeight );
if( !cellRect.IntersectsWith( scrollingCellsDecoratorRect ) )
{
return false;
}
else if( !scrollingCellsDecoratorRect.Contains( point ) )
{
return false;
}
return true;
}
private void SetPopupDragAdorner( ColumnManagerCell columnManagerCell )
{
if( columnManagerCell == null )
return;
if( m_popupDraggedElementAdorner != null )
{
this.AdornerLayerInsideDragContainer.Remove( m_popupDraggedElementAdorner );
m_popupDraggedElementAdorner = null;
}
// Get the Rect for the DataGridControl
DataGridControl dataGridControl = this.DraggedDataGridContext.DataGridControl;
Rect dataGridControlRect = new Rect( 0d, 0d, dataGridControl.ActualWidth, dataGridControl.ActualHeight );
Point elementToDataGridControl = columnManagerCell.TranslatePoint( ColumnReorderingDragSourceManager.EmptyPoint, dataGridControl );
// Get the Rect for the element that request a ghost
Rect elementRect = new Rect( elementToDataGridControl, columnManagerCell.RenderSize );
// This is a special case with the current Element that is always be layouted, but can be out of view
if( !elementRect.IntersectsWith( dataGridControlRect ) )
return;
AnimatedDraggedElementAdorner adorner = new AnimatedDraggedElementAdorner( columnManagerCell, this.AdornerLayerInsideDragContainer, true );
adorner.AdornedElementImage.Opacity = 0d;
this.ApplyContainerClip( adorner );
this.AdornerLayerInsideDragContainer.Add( adorner );
m_popupDraggedElementAdorner = adorner;
}