static void AddChildrenRecursive(TreeElement element, int numChildren, bool force, int numTotalElements, ref int allowedDepth, List <MyTreeElement> treeElements)
{
if (element.depth >= allowedDepth)
{
allowedDepth = 0;
return;
}
for (int i = 0; i < numChildren; ++i)
{
if (IDCounter > numTotalElements)
{
return;
}
var child = new MyTreeElement("Element " + IDCounter, element.depth + 1, ++IDCounter);
treeElements.Add(child);
if (!force && Random.value < probabilityOfBeingLeaf)
{
continue;
}
AddChildrenRecursive(child, Random.Range(minNumChildren, maxNumChildren), false, numTotalElements, ref allowedDepth, treeElements);
}
}
public static List <MyTreeElement> GenerateRandomTree(int numTotalElements)
{
int numRootChildren = numTotalElements / 4;
IDCounter = 0;
var treeElements = new List <MyTreeElement>(numTotalElements);
var root = new MyTreeElement("Root", -1, IDCounter);
treeElements.Add(root);
for (int i = 0; i < numRootChildren; ++i)
{
int allowedDepth = 6;
AddChildrenRecursive(root, Random.Range(minNumChildren, maxNumChildren), true, numTotalElements, ref allowedDepth, treeElements);
}
return(treeElements);
}
void ToolBar()
{
using (new EditorGUILayout.HorizontalScope())
{
var style = "miniButton";
if (GUILayout.Button("Expand All", style))
{
m_TreeView.ExpandAll();
}
if (GUILayout.Button("Collapse All", style))
{
m_TreeView.CollapseAll();
}
GUILayout.FlexibleSpace();
if (GUILayout.Button("Add Item", style))
{
Undo.RecordObject(asset, "Add Item To Asset");
// Add item as child of selection
var selection = m_TreeView.GetSelection();
TreeElement parent = (selection.Count == 1 ? m_TreeView.treeModel.Find(selection[0]) : null) ?? m_TreeView.treeModel.root;
int depth = parent != null ? parent.depth + 1 : 0;
int id = m_TreeView.treeModel.GenerateUniqueID();
var element = new MyTreeElement("Item " + id, depth, id);
m_TreeView.treeModel.AddElement(element, parent, 0);
// Select newly created element
m_TreeView.SetSelection(new[] { id }, TreeViewSelectionOptions.RevealAndFrame);
}
if (GUILayout.Button("Remove Item", style))
{
Undo.RecordObject(asset, "Remove Item From Asset");
var selection = m_TreeView.GetSelection();
m_TreeView.treeModel.RemoveElements(selection);
}
}
}