Add FR2
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#define DEV_MODE
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using System;
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using System.Collections.Generic;
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using UnityEditor;
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using UnityEngine;
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namespace vietlabs.fr2
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{
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public class FR2_TreeUI
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{
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public float itemH = 16f;
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private Vector2 position;
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private FR2_TreeItemUI root;
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public int selected;
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public Color selectedColor = new Color32(0, 0, 255, 100);
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private Rect visibleRect;
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public void Draw(FR2_TreeItemUI root, bool drawRoot = true)
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{
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EventType evtType = Event.current.type;
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Rect r = GUILayoutUtility.GetRect(1f, Screen.width, itemH, Screen.height);
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if (evtType != EventType.Layout)
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{
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visibleRect = r;
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}
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int n = root.GetNVisible(Mathf.Max(root._treeStamp, 1));
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var contentRect = new Rect(0f, 0f, 1f, n * itemH);
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int nVisible = Mathf.RoundToInt(visibleRect.height / itemH) + 1;
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int min = Mathf.Max(0, Mathf.FloorToInt(position.y / itemH));
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int max = Mathf.Min(min + nVisible, n);
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bool noScroll = contentRect.height < visibleRect.height;
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//Debug.Log("Drawing :: " + min + ":" + max + ":" + n);
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if (noScroll)
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{
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position = Vector2.zero;
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}
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position = GUI.BeginScrollView(visibleRect, position, contentRect);
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{
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var rect = new Rect(0, 0, r.width - (noScroll ? 4f : itemH), itemH);
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var current = 0;
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if (drawRoot)
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{
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root.Draw(min, max, ref rect, ref current);
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}
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else
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{
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root.DrawChildren(min, max, ref rect, ref current);
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}
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}
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GUI.EndScrollView();
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}
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public void Draw<T>(List<T> list) where T : FR2_TreeItemUI
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{
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if (root == null)
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{
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root = new FR2_TreeItemUI();
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for (var i = 0; i < list.Count; i++)
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{
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root.AddChild(list[i]);
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}
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}
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Draw(root, false);
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}
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public void Draw<T>(List<T> objList, Action<int, Rect, T> itemDrawer)
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{
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Draw(objList.Count, (idx, r, hasMouse) => { itemDrawer(idx, r, objList[idx]); });
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//var evtType = Event.current.type;
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//Rect r = GUILayoutUtility.GetRect(1f, Screen.width, 16f, Screen.height);
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//if (evtType != EventType.layout){
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// visibleRect = r;
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//}
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//var n = objList.Count;
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//var contentRect = new Rect(0f, 0f, 1f, n * itemH);
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//var nVisible = Mathf.RoundToInt(visibleRect.height/itemH) + 1;
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//var min = Mathf.Max(0, Mathf.FloorToInt(position.y / itemH));
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//var max = Mathf.Min(min + nVisible, n);
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//var noScroll = contentRect.height < visibleRect.height;
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//if (noScroll) position = Vector2.zero;
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//position = GUI.BeginScrollView(visibleRect, position, contentRect);
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//{
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// var rect = new Rect (0, 0, r.width - (noScroll ? 4f : 16f), itemH);
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// for (var i = min; i<max; i++){
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// rect.y = i * itemH;
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// itemDrawer(i, rect, objList[i]);
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// }
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//}
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//GUI.EndScrollView();
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}
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public void Draw(int n, Action<int, Rect, bool> drawer, bool repaintOnly = false)
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{
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EventType evtType = Event.current.type;
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Rect r = GUILayoutUtility.GetRect(1f, Screen.width, itemH, Screen.height);
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if (evtType != EventType.Layout)
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{
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visibleRect = r;
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}
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if (!repaintOnly || evtType == EventType.Repaint)
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{
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var contentRect = new Rect(0f, 0f, 1f, n * itemH);
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int nVisible = Mathf.RoundToInt(visibleRect.height / itemH) + 1;
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int min = Mathf.Max(0, Mathf.FloorToInt(position.y / itemH));
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int max = Mathf.Min(min + nVisible, n);
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bool noScroll = contentRect.height < visibleRect.height;
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if (noScroll)
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{
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position = Vector2.zero;
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}
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position = GUI.BeginScrollView(visibleRect, position, contentRect);
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//Debug.Log(min + ":" + max + ":" + n);
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for (int i = min; i < max; i++)
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{
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var rr = new Rect(0, itemH * i, Screen.width, itemH);
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if (i == selected)
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{
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Color c = GUI.color;
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GUI.color = selectedColor;
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{
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GUI.DrawTexture(rr, EditorGUIUtility.whiteTexture);
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}
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GUI.color = c;
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}
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bool containsMouse = rr.Contains(Event.current.mousePosition);
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bool hasMouse = Event.current.type == EventType.MouseDown && containsMouse;
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drawer(i, rr, hasMouse);
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if (Event.current.type == EventType.MouseUp && containsMouse)
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{
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selected = i;
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Event.current.Use();
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}
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}
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GUI.EndScrollView();
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}
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}
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}
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public class FR2_TreeItemUI
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{
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private const float arrowWidth = 14f;
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// -------------------------- DRAWER ----------------------------
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private static GUIStyle foldStyle;
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// -------------------------- PARENT / CHILDREN ----------------------------
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protected bool _expand = true;
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protected int _itemHeight = 16;
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protected int _nFakeSize;
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protected int _nVisible;
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internal int _treeStamp;
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internal List<FR2_TreeItemUI> children = new List<FR2_TreeItemUI>();
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// -------------------------- PARENT / CHILDREN ----------------------------
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internal FR2_TreeItemUI parent;
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public virtual int GetNVisible(int stamp)
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{
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if (!_expand)
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{
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return 1 + _nFakeSize;
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}
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if (_treeStamp == stamp)
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{
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return _nVisible + _nFakeSize;
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}
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RefreshVisibleCount(stamp);
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return _nVisible + _nFakeSize;
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}
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public void ToggleExpand()
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{
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int delta = _nVisible - 1;
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_expand = !_expand;
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SetDeltaVisible(_expand ? delta : -delta, _treeStamp);
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}
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private void RefreshVisibleCount(int stamp)
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{
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_treeStamp = stamp;
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_nVisible = 1;
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for (var i = 0; i < children.Count; i++)
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{
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FR2_TreeItemUI c = children[i];
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_nVisible += c.GetNVisible(stamp);
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}
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}
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private void SetDeltaVisible(int delta, int stamp)
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{
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_treeStamp = stamp;
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_nVisible += delta;
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if (parent != null)
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{
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parent.SetDeltaVisible(delta, stamp);
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}
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else
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{
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GetNVisible(++stamp);
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}
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}
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public FR2_TreeItemUI AddChild(FR2_TreeItemUI child)
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{
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#if DEV_MODE
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{
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if (!IsValidChild(child))
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{
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return this;
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}
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if (child.parent == this)
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{
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Debug.LogWarning("Child.parent already == this");
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return this;
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}
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if (children.Contains(child))
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{
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Debug.LogWarning("Something broken, child already in this.children list <" + child +
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"> but its parent not set to this");
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return this;
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}
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}
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#endif
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if (child.parent != null)
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{
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child.parent.RemoveChild(child);
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}
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child.parent = this;
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children.Add(child);
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int delta = child.GetNVisible(_treeStamp);
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SetDeltaVisible(delta, _treeStamp);
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return this;
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}
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public FR2_TreeItemUI RemoveChild(FR2_TreeItemUI child)
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{
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#if DEV_MODE
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{
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if (!IsValidChild(child))
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{
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return this;
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}
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if (child.parent != this)
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{
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Debug.LogWarning("child.parent != this, can not remove");
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return this;
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}
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if (!children.Contains(child))
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{
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Debug.LogWarning(
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"Something broken, child.parent == this but this.children does not contains child");
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return this;
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}
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}
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#endif
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child.parent = null;
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children.Remove(child);
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//Recursive update nVIsible items up the tree
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int delta = child.GetNVisible(_treeStamp);
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SetDeltaVisible(-delta, _treeStamp);
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return this;
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}
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#if DEV_MODE
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private bool IsValidChild(FR2_TreeItemUI child)
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{
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if (child == null)
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{
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Debug.LogWarning("Child should not be null <" + child + ">");
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return false;
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}
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//if (child.target == null){
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// Debug.LogWarning("Child's target should not be null <" + child + ">");
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// return false;
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//}
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return true;
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}
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#endif
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public virtual void DrawChildren(int from, int to, ref Rect r, ref int current)
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{
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for (var i = 0; i < children.Count; i++)
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{
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children[i].Draw(from, to, ref r, ref current);
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if (current >= to)
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{
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return;
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}
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}
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}
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public virtual void Draw(int from, int to, ref Rect r, ref int current)
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{
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if (current >= to)
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{
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Debug.LogWarning("Out of view " + current + ":" + from + ":" + to + ":" + this);
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return; //finish drawing
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}
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int n = _nFakeSize + 1;
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int h = _itemHeight * n;
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if (current + n >= from)
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{
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//partially / fully visible ? just draw
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if (children.Count > 0)
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{
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// DrawTexture expand / collapse arrow
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Rect arrowRect = r;
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arrowRect.width = arrowWidth;
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EditorGUI.BeginChangeCheck();
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if (foldStyle == null)
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{
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foldStyle = "IN Foldout";
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}
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GUI.Toggle(arrowRect, _expand, GUIContent.none, foldStyle);
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if (EditorGUI.EndChangeCheck())
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{
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ToggleExpand();
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}
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}
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Rect drawRect = r;
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drawRect.x += arrowWidth;
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drawRect.width -= arrowWidth;
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drawRect.height = h;
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Draw(drawRect);
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}
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current += n;
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r.y += h;
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if (!_expand || current >= to)
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{
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return;
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}
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r.x += arrowWidth;
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r.width -= arrowWidth;
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for (var i = 0; i < children.Count; i++)
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{
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children[i].Draw(from, to, ref r, ref current);
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if (current >= to)
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{
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return;
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}
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}
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r.x -= arrowWidth;
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r.width += arrowWidth;
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}
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protected virtual void Draw(Rect r) { }
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}
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}
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