1161 lines
35 KiB
JavaScript
1161 lines
35 KiB
JavaScript
import { isBoolean } from "lodash-es";
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import { TransformCommand } from "../../commands/StateCommands";
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import { generateId } from "../../utils/helper";
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import { OperationType, OperationTypes } from "../../utils/layerHelper";
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export class CanvasEventManager {
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constructor(canvas, options = {}) {
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this.canvas = canvas;
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this.toolManager = options.toolManager || null;
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this.animationManager = options.animationManager;
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this.thumbnailManager = options.thumbnailManager;
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this.editorMode = options.editorMode || OperationType.SELECT;
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this.activeElementId = options.activeElementId || { value: null };
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this.layerManager = options.layerManager || null;
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this.layers = options.layers || null;
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this.lastSelectLayerId = options.lastSelectLayerId || null; // 最后选择的图层ID
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// 事件处理的内部状态 - 优化设备检测
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this.deviceInfo = this._detectDeviceType();
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this.dragStartTime = 0;
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this.lastMousePositions = [];
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this.positionHistoryLimit = 5; // 追踪鼠标位置的历史记录，用于计算速度
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this.longPressTimer = null;
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this.longPressThreshold = 500;
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// 初始化所有事件
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this.initEvents();
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}
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initEvents() {
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this.setupZoomEvents();
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// 优化三端设备的事件处理逻辑
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if (this.deviceInfo.isMobile || this.deviceInfo.isTablet) {
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// 真正的移动设备和平板设备使用触摸事件
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this.setupTouchEvents();
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} else {
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// PC 和 Mac 设备主要使用鼠标事件
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this.setupMouseEvents();
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}
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// Mac 设备需要额外的触摸手势支持（用于特殊场景）
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if (this.deviceInfo.isMac && this.deviceInfo.hasTouchSupport) {
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this.setupMacTouchGestures();
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}
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// 共享事件
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this.setupSelectionEvents();
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this.setupObjectEvents();
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this.setupDoubleClickEvents();
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// this.setupHandlePathCreated();
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}
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setupZoomEvents() {
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// 水平/垂直滚动相关状态
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this._scrollWheelEvents = [];
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this._scrollAccumulatedDelta = { x: 0, y: 0 };
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this._scrollAccumulationTimeout = null;
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this._scrollAccumulationTime = 100; // 降低滚轮累积时间窗口
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this._lastScrollTime = 0; // 跟踪上次滚动时间
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this._scrollThrottleDelay = 5; // 滚动节流延迟(毫秒)
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// 缩放处理 - 使用动画管理器，针对 Mac 设备优化
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this.canvas.on("mouse:wheel", (opt) => {
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// Mac 设备双指滚动优化：确保滚动事件正确处理
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if (this.deviceInfo.isMac) {
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// Mac设备的简化处理逻辑，减少不必要的动画中断
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// 让动画管理器自行处理冲突，避免过度干预
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} else {
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// 非 Mac 设备的标准处理
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if (
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this.animationManager._panAnimation ||
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this.animationManager._zoomAnimation
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) {
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this.animationManager._wasPanning =
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!!this.animationManager._panAnimation;
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this.animationManager._wasZooming =
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!!this.animationManager._zoomAnimation;
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this.animationManager.smoothStopAnimations({ duration: 0.1 });
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}
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}
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// 按住 Ctrl 键时实现垂直滚动（Mac 下是 Cmd 键）
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const isCtrlOrCmd = this.deviceInfo.isMac ? opt.e.metaKey : opt.e.ctrlKey;
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if (isCtrlOrCmd) {
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this.handleScrollWheel(opt, "vertical");
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opt.e.preventDefault();
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return;
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}
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// 按住 Shift 键时实现水平滚动
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if (opt.e.shiftKey) {
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this.handleScrollWheel(opt, "horizontal");
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opt.e.preventDefault();
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return;
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}
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// 标准缩放行为 - 让 AnimationManager 处理平滑过渡
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// Mac 设备下的双指滚动将直接进入这里进行缩放
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this.animationManager.handleMouseWheel(opt);
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});
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}
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/**
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* 处理滚轮滚动事件
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* @param {Object} opt 滚轮事件对象
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* @param {String} direction 滚动方向: 'vertical' 或 'horizontal'
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*/
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handleScrollWheel(opt, direction) {
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// 获取当前视图变换
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const vpt = this.canvas.viewportTransform.slice(0); // 创建副本避免直接修改
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const zoom = this.canvas.getZoom();
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// 计算滚动量 - 根据方向决定是水平还是垂直滚动
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let deltaX = 0;
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let deltaY = 0;
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// 设置滚动方向和距离
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if (direction === "horizontal") {
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deltaX = opt.e.deltaY; // 水平滚动
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} else {
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deltaY = opt.e.deltaY; // 垂直滚动
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}
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// 计算滚动因子，基于缩放级别和设备类型调整
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let scrollFactor = Math.max(0.4, Math.min(1, 1 / zoom));
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// Mac 设备优化：触控板滚动通常比鼠标滚轮更敏感
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if (this.deviceInfo.isMac) {
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const isMacTrackpadScroll =
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Math.abs(opt.e.deltaY) < 100 && opt.e.deltaMode === 0;
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if (isMacTrackpadScroll) {
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// Mac 触控板滚动更细腻，需要调整滚动因子
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scrollFactor *= 0.8; // 降低滚动敏感度
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}
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}
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// 直接应用滚动变化，不使用累积和计时器
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vpt[4] -= deltaX * scrollFactor;
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vpt[5] -= deltaY * scrollFactor;
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// 直接设置新的视图变换，不使用动画
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this.canvas.setViewportTransform(vpt);
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// 请求重新渲染画布
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this.canvas.renderAll();
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}
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/**
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* 处理累积的滚轮滚动事件并应用平移
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* @private
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* @param {String} direction 滚动方向
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*/
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_processAccumulatedScroll(direction) {
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// 这个函数不再需要，但为了兼容性保留空实现
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// 所有滚动逻辑已经移到 handleScrollWheel 中直接处理
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return;
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}
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/**
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* 停止所有惯性动画
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* @param {boolean} smooth 是否平滑过渡，默认为 false（立即停止）
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*/
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stopInertiaAnimation(smooth = false) {
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if (this.animationManager) {
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if (this.animationManager._panAnimation && !smooth) {
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this.animationManager._panAnimation.kill();
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this.animationManager._panAnimation = null;
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}
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if (this.animationManager._zoomAnimation && !smooth) {
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this.animationManager._zoomAnimation.kill();
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this.animationManager._zoomAnimation = null;
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}
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}
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}
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/**
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* 设置鼠标事件处理
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*/
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setupMouseEvents() {
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// 鼠标按下事件
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this.canvas.on("mouse:down", (opt) => {
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// console.log("==========鼠标按下",opt)
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// 平滑停止任何正在进行的惯性动画
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this.stopInertiaAnimation(true);
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// if (opt.e.which === 3 && this.editorMode === OperationType.SELECT) {
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// console.log("==========选择模式鼠标右击画布对象")
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// } else
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if (
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opt.e.altKey ||
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opt.e.which === 2 ||
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this.editorMode === OperationType.PAN
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) {
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this.canvas.isDragging = true;
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this.canvas.lastPosX = opt.e.clientX;
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this.canvas.lastPosY = opt.e.clientY;
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this.canvas.defaultCursor = "grabbing";
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// 记录拖动开始时间和位置，用于计算速度
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this.dragStartTime = Date.now();
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this.lastMousePositions = []; // 重置位置历史
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if (this.canvas.isDragging) {
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this.canvas.selection = false;
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this.canvas.renderAll();
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}
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}
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});
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// 鼠标移动事件
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this.canvas.on("mouse:move", (opt) => {
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if (!this.canvas.isDragging) return;
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const vpt = this.canvas.viewportTransform;
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vpt[4] += opt.e.clientX - this.canvas.lastPosX;
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vpt[5] += opt.e.clientY - this.canvas.lastPosY;
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// 记录鼠标位置和时间，用于计算惯性
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const now = Date.now();
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this.lastMousePositions.push({
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x: opt.e.clientX,
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y: opt.e.clientY,
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time: now,
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});
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// 保持历史记录在限定数量内
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if (this.lastMousePositions.length > this.positionHistoryLimit) {
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this.lastMousePositions.shift();
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}
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this.canvas.renderAll();
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this.canvas.lastPosX = opt.e.clientX;
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this.canvas.lastPosY = opt.e.clientY;
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});
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// 鼠标抬起事件
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this.canvas.on("mouse:up", (opt) => {
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this.handleDragEnd(opt);
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});
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}
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/**
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* 设置触摸事件处理 - 修复iPad触摸事件支持
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*/
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setupTouchEvents() {
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// 启用Fabric.js的指针事件支持（适用于触摸设备）
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this.canvas.enablePointerEvents = true;
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// 触摸状态管理
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this.touchState = {
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isZooming: false,
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initialDistance: 0,
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initialZoom: 1,
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lastTouchTime: 0,
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lastZoomTime: 0,
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zoomThrottle: 16, // 约60fps的节流
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};
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// iPad特殊处理：禁用默认的触摸行为
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if (this.deviceInfo.isTablet) {
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document.addEventListener(
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"touchstart",
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(e) => {
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if (e.target.closest("canvas")) {
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e.preventDefault();
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}
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},
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{ passive: false }
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);
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document.addEventListener(
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"touchmove",
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(e) => {
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if (e.target.closest("canvas")) {
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e.preventDefault();
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}
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},
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{ passive: false }
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);
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}
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// 使用标准的mouse事件，Fabric.js会自动处理触摸转换
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this.canvas.on("mouse:down", (opt) => {
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// 只在PAN模式下处理触摸事件
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if (this.editorMode !== OperationType.PAN) {
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return;
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}
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// 平滑停止任何正在进行的惯性动画
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this.stopInertiaAnimation(true);
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// 检查是否是触摸事件
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const isTouch = opt.e.type && opt.e.type.includes("touch");
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const touches =
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opt.e.touches || (opt.e.originalEvent && opt.e.originalEvent.touches);
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if (isTouch && touches && touches.length === 2) {
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// 双指触摸 - 用于缩放
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this.touchState.isZooming = true;
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this.touchState.initialDistance = this.getTouchDistance(
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touches[0],
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touches[1]
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);
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this.touchState.initialZoom = this.canvas.getZoom();
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// 计算缩放中心点
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const centerX = (touches[0].clientX + touches[1].clientX) / 2;
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const centerY = (touches[0].clientY + touches[1].clientY) / 2;
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this.touchState.zoomCenter = { x: centerX, y: centerY };
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opt.e.preventDefault();
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} else if (isTouch && touches && touches.length === 1) {
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// 单指触摸 - 用于拖拽
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this.canvas.isDragging = true;
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this.canvas.lastPosX = touches[0].clientX;
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this.canvas.lastPosY = touches[0].clientY;
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this.dragStartTime = Date.now();
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this.lastMousePositions = [];
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this.canvas.selection = false;
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opt.e.preventDefault();
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} else if (!isTouch) {
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// 鼠标事件 - 用于拖拽
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this.canvas.isDragging = true;
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this.canvas.lastPosX = opt.e.clientX;
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this.canvas.lastPosY = opt.e.clientY;
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this.dragStartTime = Date.now();
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this.lastMousePositions = [];
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this.canvas.selection = false;
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opt.e.preventDefault();
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}
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});
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// 触摸移动事件 - 优化性能
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this.canvas.on("mouse:move", (opt) => {
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// 只在PAN模式下处理
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if (this.editorMode !== OperationType.PAN) {
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return;
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}
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// 检查是否是触摸事件
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const isTouch = opt.e.type && opt.e.type.includes("touch");
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const touches =
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opt.e.touches || (opt.e.originalEvent && opt.e.originalEvent.touches);
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if (
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isTouch &&
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touches &&
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touches.length === 2 &&
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this.touchState.isZooming
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) {
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// 双指缩放处理 - 修复抖动问题
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const currentDistance = this.getTouchDistance(touches[0], touches[1]);
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// 防止除零和异常值
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if (this.touchState.initialDistance === 0 || currentDistance === 0) {
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return;
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}
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const scale = currentDistance / this.touchState.initialDistance;
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// 防止抖动：忽略微小的变化
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if (Math.abs(scale - 1) < 0.01) {
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return;
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}
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const newZoom = this.touchState.initialZoom * scale;
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// 限制缩放范围
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const clampedZoom = Math.max(0.1, Math.min(5, newZoom));
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// 使用缩放中心点进行缩放
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const point = new fabric.Point(
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this.touchState.zoomCenter.x,
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this.touchState.zoomCenter.y
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);
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this.canvas.zoomToPoint(point, clampedZoom);
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opt.e.preventDefault();
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return;
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}
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if (!this.canvas.isDragging) return;
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let currentX, currentY;
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if (isTouch && touches && touches.length === 1) {
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// 单指触摸移动
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currentX = touches[0].clientX;
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currentY = touches[0].clientY;
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} else if (!isTouch) {
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// 鼠标移动
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currentX = opt.e.clientX;
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currentY = opt.e.clientY;
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} else {
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return; // 忽略其他情况
|
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}
|
||
|
||
// 优化：减少频繁的DOM操作
|
||
const deltaX = currentX - this.canvas.lastPosX;
|
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const deltaY = currentY - this.canvas.lastPosY;
|
||
|
||
// 只有移动距离足够大时才更新
|
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if (Math.abs(deltaX) < 1 && Math.abs(deltaY) < 1) {
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return;
|
||
}
|
||
|
||
const vpt = this.canvas.viewportTransform;
|
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vpt[4] += deltaX;
|
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vpt[5] += deltaY;
|
||
|
||
// 优化：减少历史记录频率
|
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const now = Date.now();
|
||
if (now - this.touchState.lastTouchTime > 16) {
|
||
// 约60fps
|
||
this.lastMousePositions.push({
|
||
x: currentX,
|
||
y: currentY,
|
||
time: now,
|
||
});
|
||
|
||
if (this.lastMousePositions.length > this.positionHistoryLimit) {
|
||
this.lastMousePositions.shift();
|
||
}
|
||
|
||
this.touchState.lastTouchTime = now;
|
||
}
|
||
|
||
this.canvas.requestRenderAll(); // 使用requestRenderAll代替renderAll
|
||
this.canvas.lastPosX = currentX;
|
||
this.canvas.lastPosY = currentY;
|
||
opt.e.preventDefault();
|
||
});
|
||
|
||
// 触摸结束事件
|
||
this.canvas.on("mouse:up", (opt) => {
|
||
// 只在PAN模式下处理
|
||
if (this.editorMode !== OperationType.PAN) {
|
||
return;
|
||
}
|
||
|
||
// 重置触摸状态
|
||
this.touchState.isZooming = false;
|
||
this.touchState.initialDistance = 0;
|
||
|
||
this.handleDragEnd(opt, true);
|
||
});
|
||
|
||
// 添加原生触摸事件监听器作为备用方案
|
||
this.setupNativeTouchEvents();
|
||
}
|
||
|
||
/**
|
||
* 计算两个触摸点之间的距离
|
||
*/
|
||
getTouchDistance(touch1, touch2) {
|
||
const dx = touch1.clientX - touch2.clientX;
|
||
const dy = touch1.clientY - touch2.clientY;
|
||
return Math.sqrt(dx * dx + dy * dy);
|
||
}
|
||
|
||
/**
|
||
* 设置原生触摸事件监听器（备用方案）- 专门处理iPad双指缩放
|
||
*/
|
||
setupNativeTouchEvents() {
|
||
const canvasElement = this.canvas.upperCanvasEl;
|
||
|
||
// 确保canvas元素支持触摸
|
||
canvasElement.style.touchAction = "none";
|
||
|
||
let lastTouchDistance = 0;
|
||
let lastZoom = 1;
|
||
|
||
// 原生touchstart事件 - 处理双指缩放初始化
|
||
canvasElement.addEventListener(
|
||
"touchstart",
|
||
(e) => {
|
||
if (this.editorMode !== OperationType.PAN) return;
|
||
|
||
// 调试信息
|
||
if (process.env.NODE_ENV === "development") {
|
||
// console.log("iPad touchstart:", e.touches.length, "fingers");
|
||
}
|
||
|
||
if (e.touches.length === 2) {
|
||
// 双指触摸开始
|
||
this.touchState.isZooming = true;
|
||
lastTouchDistance = this.getTouchDistance(e.touches[0], e.touches[1]);
|
||
lastZoom = this.canvas.getZoom();
|
||
|
||
// 计算缩放中心点
|
||
const centerX = (e.touches[0].clientX + e.touches[1].clientX) / 2;
|
||
const centerY = (e.touches[0].clientY + e.touches[1].clientY) / 2;
|
||
this.touchState.zoomCenter = { x: centerX, y: centerY };
|
||
|
||
if (process.env.NODE_ENV === "development") {
|
||
// console.log("iPad双指缩放开始:", {
|
||
// distance: lastTouchDistance,
|
||
// zoom: lastZoom,
|
||
// center: this.touchState.zoomCenter,
|
||
// });
|
||
}
|
||
|
||
e.preventDefault();
|
||
}
|
||
},
|
||
{ passive: false }
|
||
);
|
||
|
||
// 原生touchmove事件 - 处理双指缩放（修复抖动问题）
|
||
canvasElement.addEventListener(
|
||
"touchmove",
|
||
(e) => {
|
||
if (this.editorMode !== OperationType.PAN) return;
|
||
|
||
if (e.touches.length === 2 && this.touchState.isZooming) {
|
||
// 节流处理，避免过于频繁的缩放操作
|
||
const now = Date.now();
|
||
if (
|
||
now - this.touchState.lastZoomTime <
|
||
this.touchState.zoomThrottle
|
||
) {
|
||
return;
|
||
}
|
||
|
||
const currentDistance = this.getTouchDistance(
|
||
e.touches[0],
|
||
e.touches[1]
|
||
);
|
||
|
||
// 防止除零和异常值
|
||
if (lastTouchDistance === 0 || currentDistance === 0) {
|
||
return;
|
||
}
|
||
|
||
const scale = currentDistance / lastTouchDistance;
|
||
|
||
// 防止抖动：忽略微小的变化
|
||
if (Math.abs(scale - 1) < 0.02) {
|
||
return;
|
||
}
|
||
|
||
// 使用当前缩放值而不是初始缩放值，避免累积误差
|
||
const currentZoom = this.canvas.getZoom();
|
||
const newZoom = currentZoom * scale;
|
||
|
||
// 限制缩放范围
|
||
const clampedZoom = Math.max(0.1, Math.min(5, newZoom));
|
||
|
||
if (process.env.NODE_ENV === "development") {
|
||
// console.log("iPad双指缩放中:", {
|
||
// currentDistance,
|
||
// lastTouchDistance,
|
||
// scale,
|
||
// currentZoom,
|
||
// newZoom,
|
||
// clampedZoom,
|
||
// });
|
||
}
|
||
|
||
// 使用缩放中心点进行缩放
|
||
const point = new fabric.Point(
|
||
this.touchState.zoomCenter.x,
|
||
this.touchState.zoomCenter.y
|
||
);
|
||
|
||
this.canvas.zoomToPoint(point, clampedZoom);
|
||
|
||
// 更新基准距离和时间，避免累积误差
|
||
lastTouchDistance = currentDistance;
|
||
this.touchState.lastZoomTime = now;
|
||
|
||
e.preventDefault();
|
||
}
|
||
},
|
||
{ passive: false }
|
||
);
|
||
|
||
// 原生touchend事件 - 重置缩放状态
|
||
canvasElement.addEventListener(
|
||
"touchend",
|
||
(e) => {
|
||
if (this.editorMode !== OperationType.PAN) return;
|
||
|
||
if (e.touches.length < 2) {
|
||
this.touchState.isZooming = false;
|
||
lastTouchDistance = 0;
|
||
}
|
||
|
||
e.preventDefault();
|
||
},
|
||
{ passive: false }
|
||
);
|
||
}
|
||
|
||
/**
|
||
* 处理拖动结束（鼠标抬起或触摸结束）
|
||
*/
|
||
handleDragEnd(opt, isTouch = false) {
|
||
if (this.canvas.isDragging) {
|
||
// 使用动画管理器处理惯性效果
|
||
if (this.lastMousePositions.length > 1 && opt && opt.e) {
|
||
this.animationManager.applyInertiaEffect(
|
||
this.lastMousePositions,
|
||
isTouch
|
||
);
|
||
}
|
||
}
|
||
|
||
this.canvas.isDragging = false;
|
||
|
||
if (this.toolManager) {
|
||
this.toolManager.restoreSelectionState(); // 恢复选择状态
|
||
}
|
||
|
||
this.canvas.renderAll();
|
||
}
|
||
|
||
setupSelectionEvents() {
|
||
// 监听对象选择事件
|
||
this.canvas.on("selection:created", (opt) => this.updateSelectedLayer(opt));
|
||
|
||
this.canvas.on("selection:updated", (opt) => this.updateSelectedLayer(opt));
|
||
|
||
// this.canvas.on("selection:cleared", () => this.clearSelectedElements());
|
||
}
|
||
|
||
setupObjectEvents() {
|
||
// 监听对象变化事件，用于更新缩略图
|
||
this.canvas.on("object:added", (e) => {
|
||
if (this.thumbnailManager && e.target && e.target.id) {
|
||
// 延迟更新以确保对象完全添加
|
||
setTimeout(() => {
|
||
// 现在图层就是元素本身，直接更新元素的缩略图
|
||
this.thumbnailManager.generateLayerThumbnail(e.target.layerId);
|
||
}, 300);
|
||
}
|
||
});
|
||
|
||
// 添加对象开始变换时的状态捕获
|
||
this.canvas.on(
|
||
"object:moving",
|
||
this._captureInitialTransformState.bind(this)
|
||
);
|
||
this.canvas.on(
|
||
"object:scaling",
|
||
this._captureInitialTransformState.bind(this)
|
||
);
|
||
this.canvas.on(
|
||
"object:rotating",
|
||
this._captureInitialTransformState.bind(this)
|
||
);
|
||
this.canvas.on(
|
||
"object:skewing",
|
||
this._captureInitialTransformState.bind(this)
|
||
);
|
||
|
||
this.canvas.on("object:modified", (e) => {
|
||
// 移除调试日志
|
||
// console.log("object:modified", e);
|
||
|
||
const activeObj = e.target || this.canvas.getActiveObject();
|
||
|
||
if (activeObj && this.layerManager?.commandManager) {
|
||
// 使用新的轻量级 TransformCommand 替代完整状态保存
|
||
// 检查对象是否有初始变换状态记录
|
||
if (activeObj._initialTransformState) {
|
||
// 创建并执行 TransformCommand，只记录变换属性的变化
|
||
const transformCmd = new TransformCommand({
|
||
canvas: this.canvas,
|
||
objectId: activeObj.id,
|
||
initialState: activeObj._initialTransformState,
|
||
finalState: TransformCommand.captureTransformState(activeObj),
|
||
objectType: activeObj.type,
|
||
name: `变换 ${activeObj.type || "对象"}`,
|
||
layerManager: this.layerManager,
|
||
layers: this.layers,
|
||
lastSelectLayerId: this.lastSelectLayerId,
|
||
});
|
||
|
||
// 执行并将命令添加到历史栈
|
||
this.layerManager.commandManager.execute(transformCmd, {
|
||
name: "对象修改",
|
||
});
|
||
// 清除临时状态记录
|
||
delete activeObj._initialTransformState;
|
||
}
|
||
}
|
||
|
||
if (this.thumbnailManager && e.target) {
|
||
if (e.target.id) {
|
||
this.updateLayerThumbnail(e.target.id, e.target);
|
||
|
||
// 如果该元素是分组图层的一部分，也更新分组图层的缩略图
|
||
if (e.target.parentId) {
|
||
this.updateLayerThumbnail(e.target.parentId);
|
||
}
|
||
}
|
||
}
|
||
});
|
||
|
||
this.canvas.on("object:removed", (e) => {
|
||
if (this.thumbnailManager && e.target) {
|
||
if (e.target.id) {
|
||
// 如果该元素是分组图层的一部分，也更新分组图层的缩略图
|
||
if (e.target.parentId) {
|
||
// setTimeout(() => this.updateLayerThumbnail(e.target.parentId), 50);
|
||
this.thumbnailManager.generateLayerThumbnail(e.target.parentId);
|
||
}
|
||
}
|
||
}
|
||
});
|
||
|
||
// // 鼠标抬起时，检查是否需要保存状态
|
||
// this.canvas.on("mouse:up", (e) => {
|
||
// // 只在选择模式下处理对象变换的状态保存
|
||
// if (this.editorMode !== OperationType.SELECT) {
|
||
// // 绘画、擦除等模式通过各自的命令管理状态，不需要在这里保存
|
||
// return;
|
||
// }
|
||
|
||
// const activeObj = this.canvas.getActiveObject();
|
||
// if (
|
||
// activeObj &&
|
||
// activeObj._stateRecord &&
|
||
// activeObj._stateRecord.isModifying
|
||
// ) {
|
||
// const original = activeObj._stateRecord.originalState;
|
||
|
||
// // 检查是否是真正的变换操作（移动、缩放、旋转）
|
||
// const hasTransformChanged =
|
||
// original.left !== activeObj.left ||
|
||
// original.top !== activeObj.top ||
|
||
// original.scaleX !== activeObj.scaleX ||
|
||
// original.scaleY !== activeObj.scaleY ||
|
||
// original.angle !== activeObj.angle;
|
||
|
||
// // 只有在对象发生变换且不是命令执行过程中时才保存状态
|
||
// if (hasTransformChanged && this.layerManager) {
|
||
// // 立即保存状态，而不是延迟执行
|
||
// this.layerManager.saveCanvasState();
|
||
// delete activeObj._stateRecord;
|
||
// } else {
|
||
// // 清理状态记录，即使没有保存状态
|
||
// delete activeObj._stateRecord;
|
||
// }
|
||
// }
|
||
// });
|
||
}
|
||
|
||
setupDoubleClickEvents() {
|
||
// 双击处理
|
||
this.canvas.on("mouse:dblclick", (opt) => {
|
||
if (opt.target) {
|
||
// 双击对象的特殊处理
|
||
} else {
|
||
// 双击空白处重置缩放
|
||
if (this.animationManager) {
|
||
this.animationManager.resetZoom(true);
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
setupLongPress(callback) {
|
||
this.canvas.on("mouse:down", (opt) => {
|
||
if (!opt.target) return;
|
||
|
||
this.longPressTimer = setTimeout(() => {
|
||
callback(opt);
|
||
}, this.longPressThreshold);
|
||
});
|
||
|
||
this.canvas.on("mouse:up", () => {
|
||
clearTimeout(this.longPressTimer);
|
||
});
|
||
|
||
this.canvas.on("mouse:move", () => {
|
||
clearTimeout(this.longPressTimer);
|
||
});
|
||
}
|
||
|
||
// 设置路径创建事件
|
||
setupHandlePathCreated() {
|
||
// 在 CanvasEventManager 的构造函数或初始化方法中
|
||
// this.canvas.on("path:created", this._handlePathCreated.bind(this));
|
||
}
|
||
|
||
_handlePathCreated(e) {
|
||
// // 获取新创建的路径对象
|
||
// const path = e.path;
|
||
// // 设置路径的ID和其他属性
|
||
// path.id = generateId(); // 生成唯一ID
|
||
// // 获取当前活动图层
|
||
// const activeLayer = this.layerManager.getActiveLayer();
|
||
// // 将路径对象绑定到当前活动图层
|
||
// if (activeLayer) {
|
||
// // 设置路径的图层ID
|
||
// path.layerId = activeLayer.id;
|
||
// // 更新图层对象列表
|
||
// if (!activeLayer.fabricObjects) activeLayer.fabricObjects = [];
|
||
// activeLayer.fabricObjects.push(path);
|
||
// // 更新图层缩略图
|
||
// if (this.thumbnailManager) {
|
||
// this.thumbnailManager.generateLayerThumbnail(activeLayer.id);
|
||
// }
|
||
// }
|
||
}
|
||
|
||
/**
|
||
* 合并图层中的对象为组以提高性能
|
||
* @param {Object} options 合并选项
|
||
* @param {fabric.Image} options.fabricImage 新的图像对象
|
||
* @param {Object} options.activeLayer 当前活动图层
|
||
* @private
|
||
*/
|
||
async mergeLayerObjectsForPerformance({ fabricImage, activeLayer, options }) {
|
||
// 确保有命令管理器
|
||
if (!this.layerManager || !this.layerManager.commandManager) {
|
||
console.warn("合并对象失败：没有命令管理器");
|
||
return;
|
||
}
|
||
|
||
// 确保有活动图层
|
||
if (!activeLayer) {
|
||
console.warn("合并对象失败：没有活动图层");
|
||
return;
|
||
}
|
||
// 验证是否需要合并
|
||
const hasExistingObjects =
|
||
Array.isArray(activeLayer.fabricObjects) &&
|
||
activeLayer.fabricObjects.length > 0;
|
||
const hasNewImage = !!fabricImage;
|
||
|
||
if (!hasExistingObjects && !hasNewImage) {
|
||
// console.log("没有对象需要合并");
|
||
return;
|
||
}
|
||
|
||
// 如果只有一个新图像且图层为空，直接添加到图层
|
||
if (hasNewImage && !hasExistingObjects) {
|
||
this.layerManager.addObjectToLayer(fabricImage, activeLayer.id, options);
|
||
return;
|
||
}
|
||
|
||
// 执行高保真合并操作
|
||
try {
|
||
// console.log(`开始合并图层 ${activeLayer.name} 中的对象为组...`);
|
||
|
||
const command = await this.layerManager.LayerObjectsToGroup(
|
||
activeLayer,
|
||
fabricImage
|
||
);
|
||
|
||
// 设置命令的撤销状态
|
||
if (isBoolean(options.undoable)) command.undoable = options.undoable; // 是否撤销
|
||
|
||
this.layerManager?.commandManager?.execute?.(command, {
|
||
name: `合并图层 ${activeLayer.name} 中的对象为组`,
|
||
});
|
||
} catch (error) {
|
||
console.error("合并图层对象时发生错误:", error);
|
||
|
||
// 降级处理：如果合并失败，至少保证新图像能添加到图层
|
||
if (fabricImage && this.layerManager) {
|
||
// console.log("执行降级处理：直接添加图像到图层");
|
||
this.layerManager.addObjectToLayer(fabricImage, activeLayer.id);
|
||
}
|
||
}
|
||
}
|
||
|
||
updateSelectedLayer(opt) {
|
||
const selected = opt.selected[0];
|
||
if (selected) {
|
||
this.layerManager.activeLayerId.value = selected.layerId;
|
||
}
|
||
}
|
||
|
||
// clearSelectedElements() {
|
||
// this.activeElementId.value = null;
|
||
// }
|
||
|
||
// 更新图层缩略图
|
||
updateLayerThumbnail(layerId) {
|
||
if (!this.thumbnailManager || !layerId || !this.layers) return;
|
||
|
||
const layer = this.layers.value.find((l) => l.id === layerId);
|
||
if (layer) {
|
||
this.thumbnailManager.generateLayerThumbnail(layer);
|
||
}
|
||
}
|
||
|
||
// 更新子元素组合缩略图
|
||
updateLayerChidrenThumbnail(layerId, fabricObject) {
|
||
if (!this.thumbnailManager || !fabricObject || !this.layers) return;
|
||
|
||
// 查找对应的图层(现在元素就是图层)
|
||
const layer = this.layers.value.find(
|
||
(l) => l.fabricObjects && l.fabricObjects?.[0]?.id === layerId
|
||
);
|
||
|
||
if (layer) {
|
||
// 生成图层缩略图
|
||
this.thumbnailManager.generateLayerThumbnail(layer);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 设置编辑器模式
|
||
* @param {string} mode 编辑器模式
|
||
*/
|
||
setEditorMode(mode) {
|
||
if (!OperationTypes.includes(mode)) {
|
||
console.warn(`不支持的编辑器模式: ${mode}`);
|
||
return;
|
||
}
|
||
|
||
// 切换工具时，立即停止任何惯性动画，但使用平滑过渡
|
||
this.stopInertiaAnimation(true);
|
||
|
||
this.editorMode = mode;
|
||
|
||
// 如果切换到选择模式，还原鼠标指针
|
||
if (mode === OperationType.SELECT) {
|
||
this.canvas.defaultCursor = "default";
|
||
} else if (mode === OperationType.PAN) {
|
||
this.canvas.defaultCursor = "grab";
|
||
}
|
||
}
|
||
|
||
dispose() {
|
||
// 移除所有事件监听
|
||
this.canvas.off();
|
||
|
||
// 清理 Mac 专用的原生事件监听器
|
||
if (this.deviceInfo.isMac && this.canvas.upperCanvasEl) {
|
||
const upperCanvas = this.canvas.upperCanvasEl;
|
||
|
||
// 移除手势事件监听器
|
||
upperCanvas.removeEventListener("gesturestart", null);
|
||
upperCanvas.removeEventListener("gesturechange", null);
|
||
upperCanvas.removeEventListener("gestureend", null);
|
||
upperCanvas.removeEventListener("wheel", null);
|
||
}
|
||
|
||
// 清除计时器
|
||
if (this.longPressTimer) {
|
||
clearTimeout(this.longPressTimer);
|
||
this.longPressTimer = null;
|
||
}
|
||
|
||
// 停止所有动画
|
||
this.stopInertiaAnimation();
|
||
}
|
||
|
||
/**
|
||
* 捕获对象开始变换时的初始状态
|
||
* @private
|
||
* @param {Object} e 事件对象
|
||
*/
|
||
_captureInitialTransformState(e) {
|
||
const obj = e.target;
|
||
|
||
// 只在首次触发变换事件时记录初始状态
|
||
if (obj && !obj._initialTransformState && obj.id) {
|
||
// 捕获对象的初始变换状态
|
||
obj._initialTransformState = TransformCommand.captureTransformState(obj);
|
||
|
||
// 添加调试日志(可选)
|
||
// console.log(`捕获对象 ${obj.id} (${obj.type}) 的初始变换状态`);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 精确检测设备类型，区分 PC、Mac、平板和移动设备
|
||
* @private
|
||
* @returns {Object} 设备信息对象
|
||
*/
|
||
_detectDeviceType() {
|
||
const userAgent = navigator.userAgent.toLowerCase();
|
||
const platform = navigator.platform.toLowerCase();
|
||
const hasTouchSupport =
|
||
"ontouchstart" in window || navigator.maxTouchPoints > 0;
|
||
|
||
// 检测操作系统
|
||
const isMac = /mac|darwin/.test(platform) || /macintosh/.test(userAgent);
|
||
const isWindows = /win/.test(platform);
|
||
const isLinux = /linux/.test(platform) && !/android/.test(userAgent);
|
||
|
||
// 检测设备类型 - 修复iPad检测逻辑
|
||
const isMobile = /mobile|phone|android.*mobile|iphone/.test(userAgent);
|
||
// 修复iPad检测：包括iOS iPad和Android平板
|
||
const isTablet =
|
||
/tablet|ipad|android(?!.*mobile)/.test(userAgent) ||
|
||
/ipad/.test(userAgent) ||
|
||
(navigator.maxTouchPoints &&
|
||
navigator.maxTouchPoints > 1 &&
|
||
/mac/.test(userAgent));
|
||
const isDesktop = !isMobile && !isTablet;
|
||
|
||
// 检测浏览器类型（用于特定优化）
|
||
const isSafari = /safari/.test(userAgent) && !/chrome/.test(userAgent);
|
||
const isChrome = /chrome/.test(userAgent);
|
||
const isFirefox = /firefox/.test(userAgent);
|
||
|
||
// 调试日志 - 仅在开发环境输出
|
||
if (process.env.NODE_ENV === "development") {
|
||
// console.log("设备检测结果:", {
|
||
// userAgent,
|
||
// platform,
|
||
// isMobile,
|
||
// isTablet,
|
||
// isDesktop,
|
||
// hasTouchSupport,
|
||
// maxTouchPoints: navigator.maxTouchPoints,
|
||
// });
|
||
}
|
||
|
||
return {
|
||
isMac,
|
||
isWindows,
|
||
isLinux,
|
||
isMobile,
|
||
isTablet,
|
||
isDesktop,
|
||
isSafari,
|
||
isChrome,
|
||
isFirefox,
|
||
hasTouchSupport,
|
||
// 判断是否应该使用触摸事件作为主要交互方式
|
||
preferTouchEvents: (isMobile || isTablet) && !isDesktop,
|
||
// 判断是否需要特殊的 Mac 触控板处理
|
||
needsMacTrackpadOptimization: isMac && isDesktop && hasTouchSupport,
|
||
};
|
||
}
|
||
|
||
/**
|
||
* 设置 Mac 专用的触摸手势处理
|
||
* 主要用于处理触控板的多指手势，但不干扰双指滚动的缩放功能
|
||
*/
|
||
setupMacTouchGestures() {
|
||
// Mac 触控板专用：三指拖拽进行画布平移
|
||
let macGestureState = {
|
||
isThreeFingerDrag: false,
|
||
startX: 0,
|
||
startY: 0,
|
||
};
|
||
|
||
// 监听 Mac 专用的手势事件
|
||
this.canvas.upperCanvasEl.addEventListener(
|
||
"gesturestart",
|
||
(e) => {
|
||
// 阻止浏览器默认的手势行为，但保留双指缩放
|
||
if (e.scale !== 1) {
|
||
e.preventDefault();
|
||
}
|
||
},
|
||
{ passive: false }
|
||
);
|
||
|
||
this.canvas.upperCanvasEl.addEventListener(
|
||
"gesturechange",
|
||
(e) => {
|
||
// 只处理三指以上的手势，保留双指缩放给 mouse:wheel 事件
|
||
if (e.touches && e.touches.length >= 3) {
|
||
e.preventDefault();
|
||
|
||
if (!macGestureState.isThreeFingerDrag) {
|
||
macGestureState.isThreeFingerDrag = true;
|
||
macGestureState.startX = e.pageX;
|
||
macGestureState.startY = e.pageY;
|
||
this.canvas.isDragging = true;
|
||
this.canvas.lastPosX = e.pageX;
|
||
this.canvas.lastPosY = e.pageY;
|
||
this.stopInertiaAnimation(true);
|
||
} else {
|
||
// 执行三指拖拽平移
|
||
const vpt = this.canvas.viewportTransform;
|
||
vpt[4] += e.pageX - this.canvas.lastPosX;
|
||
vpt[5] += e.pageY - this.canvas.lastPosY;
|
||
|
||
this.canvas.renderAll();
|
||
this.canvas.lastPosX = e.pageX;
|
||
this.canvas.lastPosY = e.pageY;
|
||
}
|
||
}
|
||
},
|
||
{ passive: false }
|
||
);
|
||
|
||
this.canvas.upperCanvasEl.addEventListener(
|
||
"gestureend",
|
||
(e) => {
|
||
if (macGestureState.isThreeFingerDrag) {
|
||
macGestureState.isThreeFingerDrag = false;
|
||
this.canvas.isDragging = false;
|
||
|
||
if (this.toolManager) {
|
||
this.toolManager.restoreSelectionState();
|
||
}
|
||
|
||
this.canvas.renderAll();
|
||
}
|
||
},
|
||
{ passive: false }
|
||
);
|
||
|
||
// 添加 Mac 专用的鼠标滚轮优化，确保双指滚动正常工作
|
||
this.setupMacScrollOptimization();
|
||
}
|
||
|
||
/**
|
||
* Mac 滚轮优化：确保双指滚动正确触发缩放
|
||
*/
|
||
setupMacScrollOptimization() {
|
||
if (!this.deviceInfo.isMac) return;
|
||
|
||
// Mac 下的滚轮事件优化
|
||
let macScrollState = {
|
||
lastWheelTime: 0,
|
||
wheelTimeout: null,
|
||
};
|
||
|
||
// 监听原生滚轮事件，确保 Mac 双指滚动正确处理
|
||
this.canvas.upperCanvasEl.addEventListener(
|
||
"wheel",
|
||
(e) => {
|
||
const now = Date.now();
|
||
|
||
// Mac 双指滚动的特征：通常有较高的 deltaY 精度和连续性
|
||
const isMacTrackpadScroll =
|
||
this.deviceInfo.isMac &&
|
||
Math.abs(e.deltaY) < 100 && // 像素模式
|
||
e.deltaMode === 0; // 像素模式
|
||
|
||
if (isMacTrackpadScroll) {
|
||
// 清除之前的超时
|
||
if (macScrollState.wheelTimeout) {
|
||
clearTimeout(macScrollState.wheelTimeout);
|
||
}
|
||
|
||
// 确保这个事件会被 Fabric.js 的 mouse:wheel 正确处理
|
||
macScrollState.lastWheelTime = now;
|
||
|
||
// 设置短暂延迟，防止与触摸事件冲突
|
||
macScrollState.wheelTimeout = setTimeout(() => {
|
||
// 滚轮事件处理完成
|
||
}, 16); // 约一帧的时间
|
||
}
|
||
},
|
||
{ passive: true }
|
||
);
|
||
}
|
||
}
|