public h2_TreeUIItem AddChild(h2_TreeUIItem child)
{
#if DEV_MODE
{
if (!IsValidChild(child))
{
return(this);
}
if (child.parent == this)
{
Debug.LogWarning("Child.parent already == this");
return(this);
}
if (children.Contains(child))
{
Debug.LogWarning("Something broken, child already in this.children list <" + child +
"> but its parent not set to this");
return(this);
}
}
#endif
if (child.parent != null)
{
child.parent.RemoveChild(child);
}
child.parent = this;
children.Add(child);
var delta = child.GetNVisible(_treeStamp);
SetDeltaVisible(delta, _treeStamp);
return(this);
}
public h2_TreeUIItem RemoveChild(h2_TreeUIItem child)
{
#if DEV_MODE
{
if (!IsValidChild(child))
{
return(this);
}
if (child.parent != this)
{
Debug.LogWarning("child.parent != this, can not remove");
return(this);
}
if (!children.Contains(child))
{
Debug.LogWarning("Something broken, child.parent == this but this.children does not contains child");
return(this);
}
}
#endif
child.parent = null;
children.Remove(child);
//Recursive update nVIsible items up the tree
var delta = child.GetNVisible(_treeStamp);
SetDeltaVisible(-delta, _treeStamp);
return(this);
}
public void Draw(h2_TreeUIItem root)
{
var evtType = Event.current.type;
var r = GUILayoutUtility.GetRect(1f, Screen.width, 16f, Screen.height);
if (evtType != EventType.layout)
{
visibleRect = r;
}
var n = root.GetNVisible(Mathf.Max(root._treeStamp, 1));
var contentRect = new Rect(0f, 0f, 1f, n * itemH);
var nVisible = Mathf.RoundToInt(visibleRect.height / itemH) + 1;
var min = Mathf.Max(0, Mathf.FloorToInt(position.y / itemH));
var max = Mathf.Min(min + nVisible, n);
var noScroll = contentRect.height < visibleRect.height;
//Debug.Log("Drawing :: " + min + ":" + max + ":" + n);
if (noScroll)
{
position = Vector2.zero;
}
position = GUI.BeginScrollView(visibleRect, position, contentRect);
{
var rect = new Rect(0, 0, r.width - (noScroll ? 4f : 16f), itemH);
var current = 0;
root.Draw(min, max, ref rect, ref current);
}
GUI.EndScrollView();
}
private bool IsValidChild(h2_TreeUIItem child)
{
if (child == null)
{
Debug.LogWarning("Child should not be null <" + child + ">");
return(false);
}
//if (child.target == null){
// Debug.LogWarning("Child's target should not be null <" + child + ">");
// return false;
//}
return(true);
}
