IRawElementProviderSimple IGridProvider.GetItem(int row, int column)
{
if (m_dataGridContext == null)
{
return(null);
}
// Here we only consider data item. No header / footer are part of the IGridProvider.
CollectionView items = m_dataGridContext.Items;
if ((row < 0) || (row >= items.Count))
{
throw new ArgumentOutOfRangeException("row");
}
ReadOnlyObservableCollection <ColumnBase> visibleColumns = m_dataGridContext.VisibleColumns;
if ((column < 0) || (column >= visibleColumns.Count))
{
throw new ArgumentOutOfRangeException("column");
}
object item = m_dataGridContext.Items.GetItemAt(row);
DataGridItemAutomationPeer itemPeer = m_dataChildren[item] as DataGridItemAutomationPeer;
if (itemPeer == null)
{
// If the item is not found in the cache, try to force is creation in the caching.
CollectionViewGroup[] groups;
this.GetParentGroupsContainingItemIndex(row, out groups);
this.ForceChildrenCaching(groups);
itemPeer = m_dataChildren[item] as DataGridItemAutomationPeer;
}
if (itemPeer == null)
{
return(null);
}
DataGridItemCellAutomationPeer cellPeer = itemPeer.GetDataGridItemCellPeer(visibleColumns[column]);
if (cellPeer == null)
{
return(null);
}
return(this.ProviderFromPeer(cellPeer));
}
protected override List <AutomationPeer> GetChildrenCore()
{
DataRow dataRow = m_dataGridContext.CustomItemContainerGenerator.ContainerFromItem(m_item) as DataRow;
if (dataRow == null)
{
return(null);
}
// Get child context ( Detail )
DetailConfigurationCollection detailConfigurations = m_dataGridContext.DetailConfigurations;
int detailConfigurationsCount = detailConfigurations.Count;
ReadOnlyObservableCollection <ColumnBase> visibleColumns = m_dataGridContext.VisibleColumns;
int visibleColumnsCount = visibleColumns.Count;
if (visibleColumnsCount + detailConfigurationsCount <= 0)
{
return(null);
}
Hashtable oldDataChildren = m_dataChildren;
List <AutomationPeer> list = new List <AutomationPeer>(visibleColumnsCount + detailConfigurationsCount);
m_dataChildren = new Hashtable(visibleColumnsCount + detailConfigurationsCount);
for (int i = 0; i < visibleColumnsCount; i++)
{
ColumnBase column = visibleColumns[i];
DataGridItemCellAutomationPeer cellAutomationPeer =
oldDataChildren[column] as DataGridItemCellAutomationPeer;
if (cellAutomationPeer == null)
{
cellAutomationPeer = new DataGridItemCellAutomationPeer(this, column);
}
// Always resetting the ColumnIndex since the visible position can have changed
cellAutomationPeer.ColumnIndex = i;
list.Add(cellAutomationPeer);
m_dataChildren[column] = cellAutomationPeer;
}
for (int i = 0; i < detailConfigurationsCount; i++)
{
DetailConfiguration detailConfiguration = detailConfigurations[i];
DataGridContextAutomationPeer detailDataGridContextAutomationPeer = null;
detailDataGridContextAutomationPeer =
oldDataChildren[detailConfiguration] as DataGridContextAutomationPeer;
if (detailDataGridContextAutomationPeer == null)
{
detailDataGridContextAutomationPeer = new DataGridContextAutomationPeer(
m_dataGridContext.DataGridControl, m_dataGridContext, m_item, detailConfiguration);
}
list.Add(detailDataGridContextAutomationPeer);
m_dataChildren[detailConfiguration] = detailDataGridContextAutomationPeer;
}
return(list);
}