public bool CanOperateOnSelection(DataNodePredicate pred)
{
if (_multiTree != null)
{
return(CanOperateOnNodes(_multiTree.SelectedNodes, pred));
}
else
{
return(CanOperateOnNodes(new List <TreeNode>()
{
_nodeTree.SelectedNode
}, pred));
}
}
private bool CanOperateOnNodesEx(IList <TreeNode> nodes, DataNodePredicate pred, out bool?elideChildren)
{
GroupCapabilities caps = GroupCapabilities.All;
elideChildren = null;
foreach (TreeNode node in nodes)
{
if (node == null || !(node.Tag is DataNode))
{
return(false);
}
DataNode dataNode = node.Tag as DataNode;
GroupCapabilities dataCaps;
if (!pred(dataNode, out dataCaps))
{
return(false);
}
caps &= dataCaps;
bool elideChildrenFlag = (dataNode.DeleteNodeCapabilities & GroupCapabilities.ElideChildren) == GroupCapabilities.ElideChildren;
if (elideChildren == null)
{
elideChildren = elideChildrenFlag;
}
if (elideChildren != elideChildrenFlag)
{
return(false);
}
}
if (nodes.Count > 1 && !SufficientCapabilities(nodes, caps))
{
return(false);
}
return(true);
}
private bool CanOperateOnNodesEx(IList<TreeNode> nodes, DataNodePredicate pred, out bool? elideChildren)
{
GroupCapabilities caps = GroupCapabilities.All;
elideChildren = null;
foreach (TreeNode node in nodes) {
if (node == null || !(node.Tag is DataNode))
return false;
DataNode dataNode = node.Tag as DataNode;
GroupCapabilities dataCaps;
if (!pred(dataNode, out dataCaps))
return false;
caps &= dataCaps;
bool elideChildrenFlag = (dataNode.DeleteNodeCapabilities & GroupCapabilities.ElideChildren) == GroupCapabilities.ElideChildren;
if (elideChildren == null)
elideChildren = elideChildrenFlag;
if (elideChildren != elideChildrenFlag)
return false;
}
if (nodes.Count > 1 && !SufficientCapabilities(nodes, caps))
return false;
return true;
}
/*private bool CreateTagNodePred (DataNode dataNode, out GroupCapabilities caps)
{
caps = GroupCapabilities.Single;
return (dataNode != null) && dataNode.CanCreateTag
}*/
private bool CanOperateOnNodes(IList<TreeNode> nodes, DataNodePredicate pred)
{
bool? elideChildren = null;
return CanOperateOnNodesEx(nodes, pred, out elideChildren);
}
public bool CanOperateOnSelection (DataNodePredicate pred)
{
if (_multiTree != null)
return CanOperateOnNodes(_multiTree.SelectedNodes, pred);
else
return CanOperateOnNodes(new List<TreeNode>() { _nodeTree.SelectedNode }, pred);
}
private bool CanOperateOnNodes(IList <TreeNode> nodes, DataNodePredicate pred)
{
bool?elideChildren = null;
return(CanOperateOnNodesEx(nodes, pred, out elideChildren));
}
