C++ (Cpp) DependencyObjectCollection::GetValueAt Examples

Example #1

File: textpointer.cpp Project: 499940913/moon

DocumentWalker::StepType
DocumentWalker::Step (IDocumentNode **node_return)
{
	DependencyObjectCollection *children = node->GetDocumentChildren();
	if (direction == DocumentWalker::Forward) {
		if (children && children->GetCount() > child_index) {
			// 1) if node is a container, step into the child
			node = IDocumentNode::CastToIDocumentNode (children->GetValueAt (child_index)->AsTextElement());
			child_index = 0;
			if (node_return)
				*node_return = node;
			return Enter;
		}
		else {
			// 2) if it's not a container, then we walk up a level, step out of this node
			IDocumentNode *parent_node = node->GetParentDocumentNode();
			if (parent_node == NULL)
				return Done;

			DependencyObjectCollection *parent_children= parent_node->GetDocumentChildren();
			int i = parent_children->IndexOf (node->AsDependencyObject());

			if (node_return)
				*node_return = node;

			child_index = i + 1;
			node = parent_node;
			return Leave;
		}
	}
	else {
		if (children && children->GetCount() > child_index && child_index >= 0) {
			// 1) if node is a container, step into the child
			node = IDocumentNode::CastToIDocumentNode (children->GetValueAt (child_index)->AsTextElement());
			children = node->GetDocumentChildren ();
			child_index = children ? children->GetCount() - 1 : 0;
			if (node_return)
				*node_return = node;
			return Enter;
		}
		else {
			// 2) if it's not a container, then we walk up a level, step out of this node
			IDocumentNode *parent_node = node->GetParentDocumentNode();
			if (parent_node == NULL)
				return Done;

			DependencyObjectCollection *parent_children= parent_node->GetDocumentChildren();
			int i = parent_children->IndexOf (node->AsDependencyObject());

			if (node_return)
				*node_return = node;

			child_index = i - 1;
			node = parent_node;
			return Leave;
		}
	}
}