public object ItemFromIndex( int index )
{
object retval = null;
this.EnsureNodeTreeCreated();
GeneratorNodeHelper nodeHelper = new GeneratorNodeHelper( m_startNode, 0, 0 );
retval = nodeHelper.FindIndex( index );
return retval;
}
void ICustomItemContainerGenerator.SetCurrentIndex( int newCurrentIndex )
{
// This method enables the possibility for the "ItemsHost" panels to set the current item of the
// DataGridControl. This is required for scenarios such as the CardflowItemsHost.
this.EnsureNodeTreeCreated();
GeneratorNodeHelper nodeHelper = new GeneratorNodeHelper( m_startNode, 0, 0 );
//First, locate the item within the Generator.
object newCurrentItem = nodeHelper.FindIndex( newCurrentIndex );
if( newCurrentItem == null )
throw new InvalidOperationException( "An attempt was made to access an item at an index that does not correspond to an item." );
//Then, if the item is within an ItemsNode, check if it belongs to a detail
ItemsGeneratorNode itemsNode = nodeHelper.CurrentNode as ItemsGeneratorNode;
if( itemsNode != null )
{
int masterIndex;
int detailIndex;
int detailNodeIndex;
DetailGeneratorNode detailNode = itemsNode.GetDetailNodeForIndex( newCurrentIndex - nodeHelper.Index, out masterIndex, out detailIndex, out detailNodeIndex );
//If it belongs to a detail
if( detailNode != null )
{
//call recursively the SetCurrentIndex method on the detail generator to ensure that if the item
//belongs to a sub-generator of the detail generator, then the appropriate DataGridContext will get invoked.
ICustomItemContainerGenerator detailGenerator = detailNode.DetailGenerator;
detailGenerator.SetCurrentIndex( detailIndex );
return;
}
}
//If the item is not within an ItemsNode or not within a detail
//then set it current within its context.
m_dataGridContext.SetCurrentItemCore( newCurrentItem, false, false );
}
