/// <summary>
///
/// </summary>
public GTree()
{
_indent = 30;
_rootNode = new GTreeNode(true);
_rootNode._SetTree(this);
_rootNode.expanded = true;
}
/// <summary>
///
/// </summary>
/// <param name="child"></param>
/// <param name="index"></param>
/// <returns></returns>
public GTreeNode AddChildAt(GTreeNode child, int index)
{
if (child == null)
{
throw new Exception("child is null");
}
int numChildren = _children.Count;
if (index >= 0 && index <= numChildren)
{
if (child.parent == this)
{
SetChildIndex(child, index);
}
else
{
if (child.parent != null)
{
child.parent.RemoveChild(child);
}
int cnt = _children.Count;
if (index == cnt)
{
_children.Add(child);
}
else
{
_children.Insert(index, child);
}
child.parent = this;
child._level = _level + 1;
child._SetTree(this.tree);
if (tree != null && this == tree.rootNode || _cell != null && _cell.parent != null && _expanded)
{
tree._AfterInserted(child);
}
}
return(child);
}
else
{
throw new Exception("Invalid child index");
}
}
internal void _SetTree(GTree value)
{
tree = value;
if (tree != null && tree.treeNodeWillExpand != null && _expanded)
{
tree.treeNodeWillExpand(this, true);
}
if (_children != null)
{
int cnt = _children.Count;
for (int i = 0; i < cnt; i++)
{
GTreeNode node = _children[i];
node._level = _level + 1;
node._SetTree(value);
}
}
}
/// <summary>
///
/// </summary>
/// <param name="index"></param>
/// <returns></returns>
public GTreeNode RemoveChildAt(int index)
{
if (index >= 0 && index < numChildren)
{
GTreeNode child = _children[index];
_children.RemoveAt(index);
child.parent = null;
if (tree != null)
{
child._SetTree(null);
tree._AfterRemoved(child);
}
return(child);
}
else
{
throw new Exception("Invalid child index");
}
}
