private static void ProcessHeadersNodeVisit(HeadersFootersGeneratorNode headersNode, DataGridContext sourceContext, int minIndex, int maxIndex, IDataGridContextVisitor visitor, ref bool stopVisit)
{
for (int i = minIndex; i <= maxIndex; i++)
{
var template = headersNode.GetAt(i);
var groupNode = headersNode.Parent as GroupGeneratorNode;
if (groupNode != null)
{
visitor.Visit(sourceContext, ( GroupHeaderFooterItem )template, ref stopVisit);
}
else
{
visitor.Visit(sourceContext, ( DataTemplate )template, ref stopVisit);
}
if (stopVisit)
{
break;
}
}
}
private int GetStickyFooterCountForNode(
HeadersFootersGeneratorNode footerNode,
int footerNodeIndex,
int realizedIndex,
bool isRealizedIndexPartOfHeaderNode )
{
int stickyFooterCount = 0;
int footersNodeItemCount = footerNode.ItemCount;
for( int i = footersNodeItemCount - 1; i >= 0; i-- )
{
if( ( isRealizedIndexPartOfHeaderNode )
&& ( footerNodeIndex + i < realizedIndex ) )
{
continue;
}
object item = footerNode.GetAt( i );
GroupHeaderFooterItem? groupHeaderFooterItem = null;
if( item is GroupHeaderFooterItem )
groupHeaderFooterItem = ( GroupHeaderFooterItem )item;
if( ( groupHeaderFooterItem != null )
&& ( !( groupHeaderFooterItem.Value.Group.IsBottomLevel ) || !this.IsGroupExpanded( groupHeaderFooterItem.Value.Group ) ) )
{
continue;
}
stickyFooterCount++;
}
return stickyFooterCount;
}
private List<StickyContainerGenerated> GenerateStickyFootersForNode(
HeadersFootersGeneratorNode footerNode,
int footerNodeIndex,
int realizedIndex,
bool isRealizedIndexPartOfFooterNode )
{
List<StickyContainerGenerated> generatedStickyContainers = new List<StickyContainerGenerated>();
int footersNodeItemCount = footerNode.ItemCount;
// The container is already part of the footer.
ICustomItemContainerGenerator generator = ( ICustomItemContainerGenerator )this;
GeneratorPosition position = generator.GeneratorPositionFromIndex( footerNodeIndex + footersNodeItemCount - 1 );
// In that case, the potential sticky containers are the requested one and bottom.
using( generator.StartAt( position, GeneratorDirection.Backward, true ) )
{
for( int i = footersNodeItemCount - 1; i >= 0; i-- )
{
if( ( isRealizedIndexPartOfFooterNode )
&& ( footerNodeIndex + i < realizedIndex ) )
{
continue;
}
object item = footerNode.GetAt( i );
GroupHeaderFooterItem? groupHeaderFooterItem = null;
if( item is GroupHeaderFooterItem )
groupHeaderFooterItem = ( GroupHeaderFooterItem )item;
if( ( groupHeaderFooterItem != null )
&& ( !( groupHeaderFooterItem.Value.Group.IsBottomLevel ) || !this.IsGroupExpanded( groupHeaderFooterItem.Value.Group ) ) )
{
this.Skip();
continue;
}
bool isNewlyRealized;
DependencyObject stickyContainer = generator.GenerateNext( out isNewlyRealized );
generatedStickyContainers.Add( new StickyContainerGenerated( stickyContainer, footerNodeIndex + i, isNewlyRealized ) );
}
}
return generatedStickyContainers;
}
private List<StickyContainerGenerated> GenerateStickyHeadersForNode(
HeadersFootersGeneratorNode headerNode,
int headerNodeIndex,
int realizedIndex,
bool isRealizedIndexPartOfHeaderNode )
{
List<StickyContainerGenerated> generatedStickyContainers = new List<StickyContainerGenerated>();
// The container is already part of the header.
ICustomItemContainerGenerator generator = ( ICustomItemContainerGenerator )this;
GeneratorPosition position = generator.GeneratorPositionFromIndex( headerNodeIndex );
// In that case, the potential sticky containers are the requested one and up.
using( generator.StartAt( position, GeneratorDirection.Forward, true ) )
{
for( int i = 0; i < headerNode.ItemCount; i++ )
{
// If the realized index represent the index of one of the HeaderNode
// item, do not process
if( ( isRealizedIndexPartOfHeaderNode )
&& ( headerNodeIndex + i > realizedIndex ) )
{
break;
}
object item = headerNode.GetAt( i );
GroupHeaderFooterItem? groupHeaderFooterItem = null;
if( item is GroupHeaderFooterItem )
groupHeaderFooterItem = ( GroupHeaderFooterItem )item;
if( ( groupHeaderFooterItem != null )
&& ( !( groupHeaderFooterItem.Value.Group.IsBottomLevel ) || !this.IsGroupExpanded( groupHeaderFooterItem.Value.Group ) ) )
{
this.Skip();
continue;
}
bool isNewlyRealized;
DependencyObject stickyContainer = generator.GenerateNext( out isNewlyRealized );
generatedStickyContainers.Add( new StickyContainerGenerated( stickyContainer, headerNodeIndex + i, isNewlyRealized ) );
}
}
return generatedStickyContainers;
}
private static void ProcessHeadersNodeVisit( HeadersFootersGeneratorNode headersNode, DataGridContext sourceContext, int minIndex, int maxIndex, IDataGridContextVisitor visitor, ref bool stopVisit )
{
for( int i = minIndex; i <= maxIndex; i++ )
{
object template = headersNode.GetAt( i );
GroupGeneratorNode groupNode = headersNode.Parent as GroupGeneratorNode;
if( groupNode != null )
{
visitor.Visit( sourceContext, ( GroupHeaderFooterItem )template, ref stopVisit );
}
else
{
visitor.Visit( sourceContext, ( DataTemplate )template, ref stopVisit );
}
if( stopVisit )
break;
}
}
