udpate 0.6.2
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using UnityEngine;
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using XericLibrary.Runtime.Blueprint.Render;
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namespace XericLibrary.Runtime.Blueprint
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{
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/// <summary>
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/// QuickGraph 输入交互工具 —— 处理画布平移、缩放和节点选择。
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/// <para>中键拖拽 = 平移；左键点击 = 选择；滚轮 = 缩放。</para>
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/// <para>快捷键（新输入系统）：方向键 = 平移，Ctrl+± = 缩放，Ctrl+H = 归位。</para>
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/// </summary>
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[BlueprintTool(phase: ToolPhase.PreUpdate, order: 50)]
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[BlueprintTheme("QuickGraph")]
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public class QuickGraphInputTool : BlueprintTool
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{
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// ---------- 配置（从 ToolConfigAssets 读取） ----------
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private QuickGraphInputConfig Config
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{
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get
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{
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if (ToolConfig is QuickGraphInputConfig external)
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return external;
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if (_defaultConfig == null)
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_defaultConfig = ScriptableObject.CreateInstance<QuickGraphInputConfig>();
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return _defaultConfig;
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}
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}
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private static QuickGraphInputConfig _defaultConfig;
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// ---------- 视图状态 ----------
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private Vector2 _targetPanOffset;
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private float _targetZoomLevel = 1f;
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private bool _viewInitialized;
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// 用于检测帧间变化
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private Vector2 _prevPanOffset;
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private float _prevZoomLevel;
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// ---------- 拖拽状态 ----------
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private bool _isDragging;
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private int _activeDragButton = -1;
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private Vector2 _dragStartPan;
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// ---------- 选择状态 ----------
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private BlueprintElementBase _hoveredElement;
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private BlueprintElementBase _selectedElement;
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// ===== 更新（平滑插值 + 键盘轮询） =====
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public override void OnUpdate(float deltaTime)
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{
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if (Graph?.Canvas == null) return;
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var cfg = Config;
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var canvas = Graph.Canvas;
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// ── 同步缩放范围 ──
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canvas.MinZoom = cfg.MinZoom;
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canvas.MaxZoom = cfg.MaxZoom;
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if (!_viewInitialized)
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{
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_targetPanOffset = canvas.PanOffset;
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_targetZoomLevel = canvas.ZoomLevel;
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_prevPanOffset = _targetPanOffset;
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_prevZoomLevel = _targetZoomLevel;
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_viewInitialized = true;
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}
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// ── 键盘轮询（新输入系统 Pan 动作值） ──
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_targetPanOffset += BlueprintInputManager.LastPanDirection
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* cfg.KeyboardPanSpeed * deltaTime;
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// ── 键盘轮询（新输入系统 Zoom 动作值） ──
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// zoomInput 对键盘按键是 ±1（按下一下），对轴是 0~1 连续值。
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// 统一按一个 scroll notch = 120 缩放，scale = 120 / ZoomDivisor
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float zoomInput = BlueprintInputManager.LastZoomAxis;
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if (!Mathf.Approximately(zoomInput, 0f))
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{
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float oldZoom = _targetZoomLevel;
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_targetZoomLevel = Mathf.Clamp(
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_targetZoomLevel + zoomInput / cfg.ZoomDivisor,
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canvas.MinZoom, canvas.MaxZoom);
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// 以鼠标焦点为中心缩放（键盘无光标，从鼠标读取）
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ApplyZoomFocus(ref _targetPanOffset, _targetZoomLevel, oldZoom);
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// 归零，避免持续累加
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BlueprintInputManager.LastZoomAxis = 0f;
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}
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// ── 平滑插值到目标值 ──
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canvas.PanOffset = Vector2.Lerp(
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canvas.PanOffset, _targetPanOffset, cfg.PanLerpSpeed * deltaTime);
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canvas.ZoomLevel = Mathf.Lerp(
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canvas.ZoomLevel, _targetZoomLevel, cfg.ZoomLerpSpeed * deltaTime);
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// ── 标记脏 ──
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if (canvas.PanOffset != _prevPanOffset || !Mathf.Approximately(canvas.ZoomLevel, _prevZoomLevel))
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{
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Graph.MarkDirty();
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_prevPanOffset = canvas.PanOffset;
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_prevZoomLevel = canvas.ZoomLevel;
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}
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}
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// ===== 鼠标移动 =====
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public override void OnPointerMove(Vector2 canvasPoint, Vector2 delta)
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{
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if (Graph == null || _isDragging) return;
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var hit = Graph.HitTest(canvasPoint);
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_hoveredElement = hit as BlueprintElementBase;
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}
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// ===== 鼠标按下 =====
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public override void OnPointerDown(Vector2 canvasPoint, int mouseButton)
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{
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if (Graph == null) return;
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if (mouseButton == 2) // 中键 → 平移
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{
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_isDragging = true;
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_activeDragButton = 2;
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_dragStartPan = _targetPanOffset;
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}
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// 左键点击选择由元素层的 IBlueprintEventHandler.OnPointerDown 处理
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}
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// ===== 鼠标释放 =====
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public override void OnPointerUp(Vector2 canvasPoint, int mouseButton)
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{
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if (_isDragging && _activeDragButton == mouseButton)
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{
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_isDragging = false;
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_activeDragButton = -1;
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}
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}
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// ===== 拖拽 =====
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public override void OnPointerDrag(Vector2 canvasPoint, Vector2 delta, int mouseButton)
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{
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if (Graph?.Canvas == null) return;
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if (mouseButton == 2) // 中键拖拽 = 平移
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{
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_targetPanOffset += delta * Graph.Canvas.ZoomLevel;
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Graph.MarkDirty();
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}
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}
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// ===== 滚轮 =====
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public override void OnScroll(Vector2 canvasPoint, Vector2 scrollDelta)
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{
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if (Graph == null) return;
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float oldZoom = _targetZoomLevel;
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_targetZoomLevel = Mathf.Clamp(
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_targetZoomLevel + scrollDelta.y / Config.ZoomDivisor,
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Graph.Canvas.MinZoom, Graph.Canvas.MaxZoom);
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if (!Mathf.Approximately(oldZoom, _targetZoomLevel))
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{
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// 以鼠标光标为中心缩放
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_targetPanOffset += canvasPoint * (oldZoom - _targetZoomLevel);
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Graph.MarkDirty();
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}
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}
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// ===== 快捷键（仅新输入系统） =====
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public override void OnAction(string actionName)
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{
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if (Graph?.Canvas == null) return;
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switch (actionName)
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{
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case BlueprintInputConstants.FocusHome:
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ResetView();
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break;
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case BlueprintInputConstants.Undo:
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break; // TODO
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case BlueprintInputConstants.Redo:
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break; // TODO
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case BlueprintInputConstants.NavigateParent:
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break; // TODO
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}
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}
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// ===== 辅助 =====
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public void ResetView()
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{
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_targetPanOffset = Vector2.zero;
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_targetZoomLevel = 1f;
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Graph?.MarkDirty();
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}
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private void SelectElement(BlueprintElementBase element)
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{
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_selectedElement = element;
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}
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/// <summary>当前悬停的元素（可能为 null）</summary>
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public BlueprintElementBase HoveredElement => _hoveredElement;
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/// <summary>当前选中的元素（可能为 null）</summary>
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public BlueprintElementBase SelectedElement => _selectedElement;
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// ===== 以鼠标焦点为中心缩放（键盘调用 — 自行读取鼠标位置） =====
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private void ApplyZoomFocus(ref Vector2 panOffset, float newZoom, float oldZoom)
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{
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if (Graph?.Canvas == null) return;
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// 通过 BlueprintUGUIInputManager 获取统一鼠标位置（已被 BlueprintInputReceiver 每帧刷新）
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Vector2 canvasCursor = Graph.Canvas.ScreenToCanvas(BlueprintUGUIInputManager.MousePosition);
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panOffset += canvasCursor * (oldZoom - newZoom);
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}
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// =====（旧 ZoomFocusAdjust 已删除 — 替代为 ApplyZoomFocus，OnScroll 直接内联 canvasPoint 计算）=====
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}
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}
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