feat(qr): 添加二维码工具栏并优化交互体验

添加二维码编辑工具栏，支持透明度和缩放调整
优化选中状态和拖拽交互，增强用户体验
重构代码结构，提高可维护性

css/qr.css

@@ -1,6 +1,6 @@
 /* 二维码功能样式 */
 
-/* 悬浮按钮 */
+/* ========== 悬浮按钮 ========== */
 #qr-btn {
     position: fixed;
     bottom: 100px;
@@ -29,7 +29,7 @@
     background: #3a7bc8;
 }
 
-/* 弹窗 */
+/* ========== 弹窗 ========== */
 #qr-modal {
     display: none;
     position: fixed;
@@ -128,9 +128,32 @@
     color: #fff;
 }
 
-/* 画布上的二维码 */
+/* ========== 画布上的二维码 ========== */
 .qr-item {
     position: absolute;
     cursor: move;
     user-select: none;
+    touch-action: none;
+}
+
+/* 选中状态 */
+.qr-item.qr-selected {
+    outline: 2px solid #4a90e2;
+    outline-offset: 2px;
+}
+
+/* ========== 二维码工具栏 - 与背景图工具栏保持一致 ========== */
+.qr-tools {
+    display: none;
+}
+
+.qr-tools.active {
+    display: flex;
+}
+
+/* 数值显示固定宽度，单独占位 */
+#qrOpacityValue, #qrScaleValue {
+    display: inline-block;
+    min-width: 40px;
+    text-align: center;
 }

index.html

@@ -74,6 +74,20 @@
                 <div class="toolbar-divider"></div>
                 <button class="toolbar-btn mirror-btn" id="mirrorHBtn" title="水平镜像">↔</button>
             </div>
+            <!-- 二维码编辑工具 -->
+            <div class="toolbar-group qr-tools" id="qrTools">
+                <label class="toolbar-label">
+                    <span>透明度</span>
+                    <input type="range" id="qrOpacitySlider" min="0" max="100" value="100" class="opacity-slider">
+                    <span id="qrOpacityValue">100%</span>
+                </label>
+                <div class="toolbar-divider"></div>
+                <label class="toolbar-label">
+                    <span>缩放</span>
+                    <input type="range" id="qrScaleSlider" min="0" max="200" value="100" class="scale-slider">
+                    <span id="qrScaleValue">100%</span>
+                </label>
+            </div>
             <!-- 背景图编辑工具 -->
             <div class="toolbar-group bg-tools" id="bgTools">
                 <label class="toolbar-label">

js/qr.js

@@ -1,153 +1,305 @@
-// 二维码功能 - 简洁可靠
+// 二维码功能 - 优化版编辑器工具栏
 (function() {
     'use strict';
 
-    // 获取元素
-    const btn = document.getElementById('qr-btn');
-    const modal = document.getElementById('qr-modal');
-    const input = document.getElementById('qr-input');
-    const preview = document.getElementById('qr-preview');
-    const closeBtn = document.querySelector('.qr-close');
-    const cancelBtn = document.querySelector('.qr-cancel');
-    const okBtn = document.querySelector('.qr-ok');
+    // ========== 配置 ==========
+    const CONFIG = {
+        MIN_SIZE: 0,
+        MAX_SIZE: 200,
+        DEFAULT_SIZE: 100,
+        PREVIEW_SIZE: 128,
+        DEBOUNCE_DELAY: 300
+    };
 
-    if (!btn || !modal) return;
+    // ========== DOM 元素缓存 ==========
+    const elements = {
+        btn: document.getElementById('qr-btn'),
+        modal: document.getElementById('qr-modal'),
+        input: document.getElementById('qr-input'),
+        preview: document.getElementById('qr-preview'),
+        closeBtn: document.querySelector('.qr-close'),
+        cancelBtn: document.querySelector('.qr-cancel'),
+        okBtn: document.querySelector('.qr-ok'),
+        // 工具栏
+        editorToolbar: document.getElementById('editorToolbar'),
+        textTools: document.getElementById('textTools'),
+        imageTools: document.getElementById('imageTools'),
+        bgTools: document.getElementById('bgTools'),
+        qrTools: document.getElementById('qrTools'),
+        qrOpacitySlider: document.getElementById('qrOpacitySlider'),
+        qrOpacityValue: document.getElementById('qrOpacityValue'),
+        qrScaleSlider: document.getElementById('qrScaleSlider'),
+        qrScaleValue: document.getElementById('qrScaleValue')
+    };
 
-    let currentQR = null;
-    let qrCount = 0;
+    // 验证必需元素
+    if (!elements.btn || !elements.modal) return;
 
-    // 检查背景图并显示按钮
-    function checkBg() {
+    // ========== 状态管理 ==========
+    const state = {
+        currentQR: null,
+        selectedQR: null,
+        previewTimer: null,
+        isDragging: false
+    };
+
+    // ========== 核心功能 ==========
+
+    /**
+     * 检查背景图并显示/隐藏二维码按钮
+     */
+    function checkBackground() {
         const container = document.getElementById('imageContainer');
         if (!container) return;
-        // 排除二维码图片，只检查背景图
-        const img = container.querySelector('img:not([data-type="qrcode"])');
-        if (img && img.src && !img.src.endsWith(window.location.href)) {
-            btn.classList.add('show');
-        } else {
-            btn.classList.remove('show');
-        }
+
+        const bgImg = container.querySelector('img:not([data-type="qrcode"])');
+        const hasBackground = bgImg && bgImg.src && !bgImg.src.endsWith(window.location.href);
+
+        elements.btn.classList.toggle('show', hasBackground);
     }
 
-    // 监听背景图变化
-    const observer = new MutationObserver(checkBg);
-    const container = document.getElementById('imageContainer');
-    if (container) {
-        observer.observe(container, { childList: true, subtree: true });
-    }
-    setInterval(checkBg, 500);
-
-    // 打开弹窗
+    /**
+     * 打开二维码生成弹窗
+     */
     function openModal() {
-        modal.classList.add('active');
-        input.value = '';
-        preview.innerHTML = '';
-        currentQR = null;
-        input.focus();
+        elements.modal.classList.add('active');
+        elements.input.value = '';
+        elements.preview.innerHTML = '';
+        state.currentQR = null;
+        elements.input.focus();
     }
 
-    // 关闭弹窗
+    /**
+     * 关闭二维码生成弹窗
+     */
     function closeModal() {
-        modal.classList.remove('active');
+        elements.modal.classList.remove('active');
     }
 
-    // 生成预览
-    function genPreview() {
-        const text = input.value.trim();
+    /**
+     * 生成二维码预览
+     */
+    function generatePreview() {
+        const text = elements.input.value.trim();
+
         if (!text) {
-            preview.innerHTML = '';
-            currentQR = null;
+            elements.preview.innerHTML = '';
+            state.currentQR = null;
             return;
         }
-        preview.innerHTML = '';
+
+        elements.preview.innerHTML = '';
+
         try {
-            currentQR = new QRCode(preview, {
+            state.currentQR = new QRCode(elements.preview, {
                 text: text,
-                width: 128,
-                height: 128
+                width: CONFIG.PREVIEW_SIZE,
+                height: CONFIG.PREVIEW_SIZE,
+                colorDark: '#000000',
+                colorLight: '#ffffff',
+                correctLevel: QRCode.CorrectLevel.M
             });
-        } catch (e) {
-            console.error('生成失败', e);
+        } catch (error) {
+            console.error('二维码生成失败:', error);
         }
     }
 
-    // 添加到画布
+    /**
+     * 将二维码添加到画布
+     */
     function addToCanvas() {
-        if (!currentQR) {
+        if (!state.currentQR) {
             alert('请输入内容');
             return;
         }
-        const canvas = preview.querySelector('canvas');
-        if (!canvas) return;
 
-        const img = document.createElement('img');
-        img.src = canvas.toDataURL();
-        img.className = 'qr-item';
-        img.dataset.type = 'qrcode';
-        img.style.width = '100px';
-        img.style.height = '100px';
+        const canvas = elements.preview.querySelector('canvas');
+        if (!canvas) return;
 
         const container = document.getElementById('imageContainer');
         const rect = container.getBoundingClientRect();
-        img.style.left = (rect.width / 2 - 50) + 'px';
-        img.style.top = (rect.height / 2 - 50) + 'px';
+
+        const img = document.createElement('img');
+        img.src = canvas.toDataURL('image/png');
+        img.className = 'qr-item';
+        img.dataset.type = 'qrcode';
+        img.style.cssText = `
+            width: ${CONFIG.DEFAULT_SIZE}px;
+            height: ${CONFIG.DEFAULT_SIZE}px;
+            opacity: 1;
+            left: ${(rect.width / 2 - CONFIG.DEFAULT_SIZE / 2)}px;
+            top: ${(rect.height / 2 - CONFIG.DEFAULT_SIZE / 2)}px;
+        `;
 
         container.appendChild(img);
         makeDraggable(img);
+        selectQR(img);
         closeModal();
 
-        if (typeof saveState === 'function') saveState();
+        saveState();
     }
 
-    // 拖拽功能 - 支持鼠标和触摸
+    /**
+     * 选中二维码
+     */
+    function selectQR(img) {
+        // 取消其他选中状态
+        document.querySelectorAll('.qr-item').forEach(el => {
+            el.classList.remove('qr-selected');
+        });
+
+        // 选中当前二维码
+        img.classList.add('qr-selected');
+        state.selectedQR = img;
+
+        // 显示二维码工具栏
+        showQRTools();
+    }
+
+    /**
+     * 显示二维码工具栏
+     */
+    function showQRTools() {
+        if (!state.selectedQR) return;
+
+        // 激活编辑器工具栏
+        if (elements.editorToolbar) {
+            elements.editorToolbar.classList.add('active');
+        }
+
+        // 隐藏其他工具栏
+        ['textTools', 'imageTools', 'bgTools'].forEach(key => {
+            if (elements[key]) elements[key].classList.remove('active');
+        });
+
+        // 显示二维码工具栏
+        if (elements.qrTools) {
+            elements.qrTools.classList.add('active');
+        }
+
+        // 同步滑块值
+        syncToolbarValues();
+    }
+
+    /**
+     * 同步工具栏滑块值
+     */
+    function syncToolbarValues() {
+        if (!state.selectedQR) return;
+
+        const opacity = parseFloat(state.selectedQR.style.opacity) || 1;
+        const size = parseInt(state.selectedQR.style.width) || CONFIG.DEFAULT_SIZE;
+
+        if (elements.qrOpacitySlider) {
+            elements.qrOpacitySlider.value = Math.round(opacity * 100);
+            elements.qrOpacityValue.textContent = Math.round(opacity * 100) + '%';
+        }
+
+        if (elements.qrScaleSlider) {
+            elements.qrScaleSlider.value = size;
+            elements.qrScaleValue.textContent = size + '%';
+        }
+    }
+
+    /**
+     * 隐藏二维码工具栏
+     */
+    function hideQRTools() {
+        if (elements.qrTools) {
+            elements.qrTools.classList.remove('active');
+        }
+
+        document.querySelectorAll('.qr-item').forEach(el => {
+            el.classList.remove('qr-selected');
+        });
+
+        state.selectedQR = null;
+    }
+
+    /**
+     * 更新二维码透明度
+     */
+    function updateOpacity(value) {
+        if (!state.selectedQR) return;
+
+        state.selectedQR.style.opacity = value / 100;
+        elements.qrOpacityValue.textContent = value + '%';
+    }
+
+    /**
+     * 更新二维码大小
+     */
+    function updateScale(value) {
+        if (!state.selectedQR) return;
+
+        state.selectedQR.style.width = value + 'px';
+        state.selectedQR.style.height = value + 'px';
+        elements.qrScaleValue.textContent = value + '%';
+    }
+
+    /**
+     * 保存状态
+     */
+    function saveState() {
+        if (typeof window.saveState === 'function') {
+            window.saveState();
+        }
+    }
+
+    // ========== 拖拽功能 ==========
+
+    /**
+     * 使元素可拖拽
+     */
     function makeDraggable(el) {
-        let dragging = false;
+        let isDragging = false;
         let startX, startY, startLeft, startTop;
 
         function startDrag(clientX, clientY) {
-            dragging = true;
+            isDragging = true;
             startX = clientX;
             startY = clientY;
             startLeft = parseInt(el.style.left) || 0;
             startTop = parseInt(el.style.top) || 0;
+            el.style.cursor = 'grabbing';
         }
 
         function moveDrag(clientX, clientY) {
-            if (!dragging) return;
+            if (!isDragging) return;
             el.style.left = (startLeft + clientX - startX) + 'px';
             el.style.top = (startTop + clientY - startY) + 'px';
         }
 
         function endDrag() {
-            if (dragging) {
-                dragging = false;
-                if (typeof saveState === 'function') saveState();
+            if (isDragging) {
+                isDragging = false;
+                el.style.cursor = 'move';
+                saveState();
             }
         }
 
         // 鼠标事件
-        el.addEventListener('mousedown', function(e) {
+        el.addEventListener('mousedown', (e) => {
             e.preventDefault();
             e.stopPropagation();
+            selectQR(el);
             startDrag(e.clientX, e.clientY);
         });
 
         // 触摸事件
-        el.addEventListener('touchstart', function(e) {
+        el.addEventListener('touchstart', (e) => {
             e.preventDefault();
             e.stopPropagation();
+            selectQR(el);
             if (e.touches.length === 1) {
                 startDrag(e.touches[0].clientX, e.touches[0].clientY);
             }
         }, { passive: false });
 
         // 全局移动事件
-        document.addEventListener('mousemove', function(e) {
-            moveDrag(e.clientX, e.clientY);
-        });
-
-        document.addEventListener('touchmove', function(e) {
-            if (dragging && e.touches.length === 1) {
+        document.addEventListener('mousemove', (e) => moveDrag(e.clientX, e.clientY));
+        document.addEventListener('touchmove', (e) => {
+            if (isDragging && e.touches.length === 1) {
                 e.preventDefault();
                 moveDrag(e.touches[0].clientX, e.touches[0].clientY);
             }
@@ -158,22 +310,67 @@
         document.addEventListener('touchend', endDrag);
     }
 
-    // 事件绑定
-    btn.addEventListener('click', openModal);
-    closeBtn.addEventListener('click', closeModal);
-    cancelBtn.addEventListener('click', closeModal);
-    okBtn.addEventListener('click', addToCanvas);
-    modal.addEventListener('click', function(e) {
-        if (e.target === modal) closeModal();
+    // ========== 事件绑定 ==========
+
+    function bindEvents() {
+        // 弹窗事件
+        elements.btn.addEventListener('click', openModal);
+        elements.closeBtn.addEventListener('click', closeModal);
+        elements.cancelBtn.addEventListener('click', closeModal);
+        elements.okBtn.addEventListener('click', addToCanvas);
+        elements.modal.addEventListener('click', (e) => {
+            if (e.target === elements.modal) closeModal();
         });
 
         // 输入防抖
-    let timer;
-    input.addEventListener('input', function() {
-        clearTimeout(timer);
-        timer = setTimeout(genPreview, 300);
+        elements.input.addEventListener('input', () => {
+            clearTimeout(state.previewTimer);
+            state.previewTimer = setTimeout(generatePreview, CONFIG.DEBOUNCE_DELAY);
         });
 
+        // 透明度滑块
+        if (elements.qrOpacitySlider) {
+            elements.qrOpacitySlider.addEventListener('input', (e) => {
+                updateOpacity(e.target.value);
+            });
+            elements.qrOpacitySlider.addEventListener('change', saveState);
+        }
+
+        // 缩放滑块
+        if (elements.qrScaleSlider) {
+            elements.qrScaleSlider.addEventListener('input', (e) => {
+                updateScale(e.target.value);
+            });
+            elements.qrScaleSlider.addEventListener('change', saveState);
+        }
+    }
+
+    // ========== 初始化 ==========
+
+    function init() {
+        // 监听背景图变化
+        const container = document.getElementById('imageContainer');
+        if (container) {
+            const observer = new MutationObserver(checkBackground);
+            observer.observe(container, { childList: true, subtree: true });
+        }
+
+        // 定期检查背景图状态
+        setInterval(checkBackground, 500);
+
+        // 绑定事件
+        bindEvents();
+
         // 初始检查
-    checkBg();
+        checkBackground();
+
+        // 暴露全局 API
+        window.QRCodeAPI = {
+            hideTools: hideQRTools,
+            getSelected: () => state.selectedQR
+        };
+    }
+
+    // 启动
+    init();
 })();

js/script.js

@@ -381,9 +381,10 @@
                                  e.target === document.getElementById('emptyTip');
             const isOverlayImage = e.target.closest('.overlay-image');
             const isTextInput = e.target.closest('.text-input');
+            const isQRCode = e.target.closest('.qr-item');
 
-            // 点击背景/空白区域
-            if (isBackground && !isOverlayImage) {
+            // 点击背景/空白区域（排除二维码）
+            if (isBackground && !isOverlayImage && !isQRCode) {
                 // 如果正在编辑，先结束编辑
                 if (editingInput) {
                     endEdit(editingInput);
@@ -398,18 +399,26 @@
                     selectedOverlay.classList.remove('selected');
                     selectedOverlay = null;
                 }
+                // 隐藏二维码工具栏
+                if (window.QRCodeAPI) {
+                    window.QRCodeAPI.hideTools();
+                }
                 // 隐藏辅助线
                 hideGuides();
                 // 隐藏编辑器工具栏
                 editorToolbar.classList.remove('active');
             }
 
-            // 点击空白区域（不是层叠图和输入框）
-            if (!isOverlayImage && !isTextInput && !isBackground) {
+            // 点击空白区域（不是层叠图、输入框和二维码）
+            if (!isOverlayImage && !isTextInput && !isBackground && !isQRCode) {
                 if (selectedOverlay) {
                     selectedOverlay.classList.remove('selected');
                     selectedOverlay = null;
                 }
+                // 隐藏二维码工具栏
+                if (window.QRCodeAPI) {
+                    window.QRCodeAPI.hideTools();
+                }
             }
         }
 
@@ -1198,6 +1207,9 @@
         textTools.classList.remove('active');
         imageTools.classList.add('active');
         bgTools.classList.remove('active');
+        // 隐藏二维码工具栏
+        const qrTools = document.getElementById('qrTools');
+        if (qrTools) qrTools.classList.remove('active');
 
         // 更新透明度滑块为当前层叠图的透明度
         const currentOpacity = overlayEl.style.opacity || '1';
@@ -1371,6 +1383,9 @@
             textTools.classList.remove('active');
             imageTools.classList.remove('active');
             bgTools.classList.add('active');
+            // 隐藏二维码工具栏
+            const qrTools = document.getElementById('qrTools');
+            if (qrTools) qrTools.classList.remove('active');
 
             // 同步滑块值
             bgScaleSlider.value = bgImageScale * 100;
@@ -1394,6 +1409,9 @@
             textTools.classList.remove('active');
             imageTools.classList.remove('active');
             bgTools.classList.add('active');
+            // 隐藏二维码工具栏
+            const qrTools = document.getElementById('qrTools');
+            if (qrTools) qrTools.classList.remove('active');
 
             // 同步滑块值
             bgScaleSlider.value = bgImageScale * 100;
@@ -1444,6 +1462,9 @@
             textTools.classList.remove('active');
             imageTools.classList.remove('active');
             bgTools.classList.add('active');
+            // 隐藏二维码工具栏
+            const qrTools = document.getElementById('qrTools');
+            if (qrTools) qrTools.classList.remove('active');
 
             // 同步滑块值
             bgScaleSlider.value = bgImageScale * 100;
@@ -1701,6 +1722,9 @@
         textTools.classList.add('active');
         imageTools.classList.remove('active');
         bgTools.classList.remove('active');
+        // 隐藏二维码工具栏
+        const qrTools = document.getElementById('qrTools');
+        if (qrTools) qrTools.classList.remove('active');
 
         // 更新工具栏状态
         updateToolbarState(element);
@@ -1724,6 +1748,9 @@
         textTools.classList.add('active');
         imageTools.classList.remove('active');
         bgTools.classList.remove('active');
+        // 隐藏二维码工具栏
+        const qrTools = document.getElementById('qrTools');
+        if (qrTools) qrTools.classList.remove('active');
 
         // 移动端/编辑模式：固定在顶部始终可见
         if (window.innerWidth <= 768 || 'ontouchstart' in window) {
@@ -2666,6 +2693,9 @@
                 textTools.classList.remove('active');
                 imageTools.classList.remove('active');
                 bgTools.classList.add('active');
+                // 隐藏二维码工具栏
+                const qrTools = document.getElementById('qrTools');
+                if (qrTools) qrTools.classList.remove('active');
             }
         }