475 lines
15 KiB
HTML
475 lines
15 KiB
HTML
<!DOCTYPE html>
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<!-- 文档类型声明：HTML5 -->
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<html lang="zh-CN">
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<!-- 根元素，语言设为简体中文 -->
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<head>
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<!-- 头部：元数据与资源 -->
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<meta charset="UTF-8">
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<!-- 字符编码：UTF-8 -->
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<!-- 视口：适配移动端，初始缩放 1 -->
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<title>远程显示</title>
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<!-- 页面标题 -->
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<link rel="icon" type="image/x-icon" href="/favicon.ico">
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<!-- 网站图标 -->
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<script src="https://cdn.socket.io/4.7.2/socket.io.min.js"></script>
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<!-- Socket.IO 客户端库，用于 WebSocket 通信 -->
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<style>
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/* ========== 全局样式 ========== */
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* { box-sizing: border-box; margin: 0; padding: 0; }
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/* 通配符：盒模型为 border-box，去除默认边距 */
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body {
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font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
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/* 字体：微软雅黑、苹方，无衬线回退 */
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background: linear-gradient(135deg, #e8f4fc 0%, #f0f8ff 50%, #e6f2ff 100%);
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/* 背景：135 度渐变，浅蓝到淡蓝 */
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min-height: 100vh;
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/* 最小高度为视口高度 */
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padding: 16px;
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/* 内边距 */
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}
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/* ========== 主容器 ========== */
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.app {
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max-width: 900px;
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/* 最大宽度限制 */
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margin: 0 auto;
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/* 水平居中 */
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background: #fff;
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/* 白色背景 */
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border-radius: 12px;
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/* 圆角 */
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box-shadow: 0 4px 20px rgba(0,0,0,0.08);
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/* 阴影 */
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overflow: hidden;
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/* 子元素超出则裁剪 */
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}
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/* ========== 顶部菜单栏 ========== */
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.menu-bar {
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display: flex;
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/* 弹性布局 */
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align-items: center;
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/* 垂直居中 */
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justify-content: center;
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/* 水平居中 */
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gap: 8px;
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/* 子元素间距 */
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padding: 12px 16px;
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background: #fff;
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border-bottom: 1px solid #e8e8e8;
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/* 底部分割线 */
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}
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.menu-item {
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display: flex;
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flex-direction: column;
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/* 纵向排列图标和文字 */
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align-items: center;
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gap: 4px;
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padding: 8px 14px;
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border: none;
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background: transparent;
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cursor: pointer;
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/* 鼠标指针为手型 */
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border-radius: 8px;
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transition: all 0.2s;
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/* 过渡动画 */
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color: #333;
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font-size: 12px;
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}
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.menu-item:hover {
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background: #f5f5f5;
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/* 悬停时浅灰背景 */
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}
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.menu-item .icon {
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width: 28px;
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height: 28px;
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display: flex;
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align-items: center;
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justify-content: center;
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font-size: 18px;
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/* 图标区域 */
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}
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.menu-item.connect .icon { color: #22c55e; }
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/* 连接按钮图标：绿色 */
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.menu-item.settings .icon { color: #3b82f6; }
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/* 设置按钮图标：蓝色 */
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.menu-item.exit .icon { color: #ef4444; }
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/* 断开按钮图标：红色 */
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.menu-item.about .icon { color: #64748b; }
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/* 关于按钮图标：灰色 */
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.menu-item.connected .icon { color: #22c55e; }
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.menu-item.connected { color: #22c55e; }
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/* 已连接状态：绿色 */
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/* ========== 主内容区 ========== */
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.main {
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display: flex;
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padding: 16px;
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gap: 20px;
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/* 左右分栏间距 */
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}
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/* ========== 显示区域 ========== */
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.display-area {
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flex: 1;
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/* 占据剩余空间 */
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min-width: 0;
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/* 允许 flex 子项收缩 */
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aspect-ratio: 1;
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/* 宽高比 1:1 */
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max-height: 420px;
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background: #1e3a5f;
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/* 深蓝背景，模拟 LCD 边框 */
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border-radius: 8px;
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display: flex;
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align-items: center;
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justify-content: center;
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overflow: hidden;
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box-shadow: inset 0 2px 8px rgba(0,0,0,0.2);
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/* 内阴影 */
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}
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.display-area canvas {
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max-width: 100%;
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max-height: 100%;
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/* canvas 自适应容器 */
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image-rendering: pixelated;
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image-rendering: crisp-edges;
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/* 像素风格渲染，避免模糊 */
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}
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.display-placeholder {
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color: rgba(255,255,255,0.5);
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/* 半透明白色提示文字 */
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font-size: 14px;
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}
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/* ========== 右侧控制面板 ========== */
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.control-panel {
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 16px;
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padding: 8px;
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}
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/* ========== D-pad 方向键 ========== */
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.dpad {
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display: grid;
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grid-template-columns: 50px 50px 50px;
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grid-template-rows: 50px 50px 50px;
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gap: 4px;
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/* 3x3 网格布局 */
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}
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.dpad .btn {
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width: 50px;
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height: 50px;
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border: none;
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border-radius: 8px;
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background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
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/* 渐变背景 */
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box-shadow: 0 2px 4px rgba(0,0,0,0.1);
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cursor: pointer;
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display: flex;
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align-items: center;
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justify-content: center;
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font-size: 20px;
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color: #22c55e;
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transition: all 0.15s;
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}
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.dpad .btn:hover {
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background: linear-gradient(180deg, #fff 0%, #f1f3f5 100%);
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box-shadow: 0 3px 6px rgba(0,0,0,0.15);
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transform: translateY(-1px);
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/* 悬停上浮效果 */
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}
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.dpad .btn:active {
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transform: translateY(0);
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box-shadow: 0 1px 2px rgba(0,0,0,0.1);
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/* 按下时恢复 */
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}
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.dpad .btn-up { grid-column: 2; grid-row: 1; }
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/* 上键：中上 */
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.dpad .btn-down { grid-column: 2; grid-row: 3; }
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/* 下键：中下 */
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.dpad .btn-left { grid-column: 1; grid-row: 2; }
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/* 左键：左中 */
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.dpad .btn-right { grid-column: 3; grid-row: 2; }
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/* 右键：右中 */
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.dpad .btn-ok { grid-column: 2; grid-row: 2; }
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/* 确认键：正中 */
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/* ========== 动作按钮 ========== */
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.action-btns {
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display: flex;
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gap: 12px;
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}
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.action-btn {
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display: flex;
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align-items: center;
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gap: 6px;
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padding: 10px 18px;
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border: none;
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border-radius: 8px;
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background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
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box-shadow: 0 2px 4px rgba(0,0,0,0.1);
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cursor: pointer;
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font-size: 14px;
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color: #333;
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transition: all 0.15s;
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}
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.action-btn:hover {
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background: linear-gradient(180deg, #fff 0%, #f1f3f5 100%);
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box-shadow: 0 3px 6px rgba(0,0,0,0.15);
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transform: translateY(-1px);
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}
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.action-btn .icon { color: #22c55e; font-size: 16px; }
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/* ========== 连接设置弹窗 ========== */
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.modal {
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display: none;
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/* 默认隐藏 */
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position: fixed;
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inset: 0;
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/* 全屏覆盖 */
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background: rgba(0,0,0,0.4);
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/* 半透明黑色遮罩 */
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align-items: center;
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justify-content: center;
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z-index: 100;
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}
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.modal.show { display: flex; }
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/* 显示时用 flex 居中 */
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.modal-content {
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background: #fff;
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padding: 24px;
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border-radius: 12px;
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box-shadow: 0 8px 32px rgba(0,0,0,0.2);
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min-width: 320px;
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}
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.modal-content h3 { margin-bottom: 16px; font-size: 16px; }
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.modal-content input {
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width: 100%;
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padding: 10px 12px;
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border: 1px solid #ddd;
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border-radius: 6px;
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margin-bottom: 12px;
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font-size: 14px;
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}
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.modal-content .btn-row {
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display: flex;
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gap: 8px;
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justify-content: flex-end;
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margin-top: 16px;
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}
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.modal-content button {
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padding: 8px 16px;
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border: none;
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border-radius: 6px;
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cursor: pointer;
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font-size: 14px;
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}
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.modal-content .btn-primary {
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background: #22c55e;
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color: #fff;
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/* 主按钮：绿色 */
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}
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.modal-content .btn-secondary {
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background: #e5e7eb;
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color: #333;
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/* 次要按钮：灰色 */
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}
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</style>
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</head>
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<body>
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<!-- 页面主体 -->
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<div class="app">
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<!-- 主应用容器 -->
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<div class="menu-bar">
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<!-- 顶部菜单栏 -->
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<button class="menu-item connect" id="btnConnect" title="连接">
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<span class="icon">📶</span>
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<span>连接</span>
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</button>
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<button class="menu-item settings" title="设置">
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<span class="icon">⚙</span>
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<span>设置</span>
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</button>
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<button class="menu-item exit" title="断开">
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<span class="icon">⏻</span>
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<span>断开</span>
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</button>
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<button class="menu-item about" id="btnAbout" title="关于">
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<span class="icon">ℹ</span>
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<span>关于</span>
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</button>
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</div>
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<div class="main">
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<!-- 主内容区：显示 + 控制 -->
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<div class="display-area">
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<!-- 屏幕显示区域 -->
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<canvas id="screen" style="display:none;"></canvas>
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<!-- canvas 初始隐藏，有画面后显示 -->
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<span class="display-placeholder" id="placeholder">点击「连接」连接装置</span>
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<!-- 未连接时的提示文字 -->
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</div>
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<div class="control-panel">
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<!-- 右侧控制面板 -->
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<div class="dpad">
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<!-- 方向键 + 确认 -->
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<button class="btn btn-up" data-key="U">▲</button>
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<button class="btn btn-left" data-key="L">◀</button>
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<button class="btn btn-ok" data-key="ENT">✓</button>
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<button class="btn btn-right" data-key="R">▶</button>
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<button class="btn btn-down" data-key="D">▼</button>
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</div>
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<div class="action-btns">
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<!-- 复归、返回按钮 -->
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<button class="action-btn" data-key="RESET">
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<span class="icon">↺</span>
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<span>复归</span>
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</button>
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<button class="action-btn" data-key="ESC">
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<span class="icon">↶</span>
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<span>返回</span>
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</button>
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</div>
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</div>
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</div>
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</div>
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<!-- 连接弹窗 -->
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<div class="modal" id="connectModal">
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<div class="modal-content">
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<h3>连接装置</h3>
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<input type="text" id="hostInput" placeholder="装置 IP 地址" value="192.168.253.3">
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<input type="number" id="portInput" placeholder="端口" value="7003">
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<div class="btn-row">
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<button class="btn-secondary" id="modalCancel">取消</button>
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<button class="btn-primary" id="modalConnect">连接</button>
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</div>
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</div>
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</div>
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<script>
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/**
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* 前端逻辑：通过 Socket.IO 与后端 WebSocket 通信。
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* - connect_device: 连接装置，成功后后端持续推送 screen 事件
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* - disconnect_device: 断开装置
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* - key: 发送按键码
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*/
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// ========== 常量与 DOM 引用 ==========
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// 按键名 -> RemoDispBus 协议码：U/D/L/R 方向，ENT 确认，ESC 返回，RESET 复归
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const KEY_MAP = { U: 0x02, D: 0x40, L: 0x10, R: 0x08, ENT: 0x20, ESC: 0x01, RESET: 0x04 };
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const canvas = document.getElementById('screen');
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// canvas 元素，用于绘制远程屏幕
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const placeholder = document.getElementById('placeholder');
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// 占位提示文字
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const connectBtn = document.getElementById('btnConnect');
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// 连接按钮
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const connectModal = document.getElementById('connectModal');
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// 连接弹窗
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const hostInput = document.getElementById('hostInput');
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// IP 输入框
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const portInput = document.getElementById('portInput');
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// 端口输入框
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const modalConnect = document.getElementById('modalConnect');
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// 弹窗内「连接」按钮
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const modalCancel = document.getElementById('modalCancel');
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// 弹窗内「取消」按钮
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// ========== WebSocket 连接 ==========
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const socket = io();
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// 连接当前页面的 origin，建立 Socket.IO 连接
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socket.on('connect', () => {});
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// 连接成功时（可留空）
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socket.on('connect_result', (data) => {
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// 收到后端连接结果
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if (data.success) {
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hideConnectModal();
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// 关闭弹窗
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connectBtn.classList.add('connected');
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// 标记为已连接状态
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connectBtn.querySelector('span:last-child').textContent = '已连接';
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// 更新按钮文字
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} else {
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alert('连接失败: ' + (data.error || '未知错误'));
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// 弹出错误提示
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}
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});
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// 服务端推送屏幕：data.png 为 base64 编码的 PNG，解码后绘制到 canvas
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socket.on('screen', (data) => {
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if (!data.png) return;
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// 无 base64 数据则跳过
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const binary = atob(data.png);
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// base64 解码为二进制字符串
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const bytes = new Uint8Array(binary.length);
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for (let i = 0; i < binary.length; i++) bytes[i] = binary.charCodeAt(i);
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// 转为 Uint8Array
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const blob = new Blob([bytes], { type: 'image/png' });
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// 创建 PNG Blob
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const url = URL.createObjectURL(blob);
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// 创建临时 URL
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const img = new Image();
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img.onload = () => {
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// 图片加载完成后
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canvas.width = img.width;
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canvas.height = img.height;
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// 设置 canvas 尺寸
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canvas.getContext('2d').drawImage(img, 0, 0);
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// 绘制到 canvas
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canvas.style.display = 'block';
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placeholder.style.display = 'none';
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// 显示 canvas，隐藏占位符
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URL.revokeObjectURL(url);
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// 释放临时 URL
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};
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img.src = url;
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// 触发加载
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});
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socket.on('disconnect_result', () => {});
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// 收到断开结果（可留空）
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function showConnectModal() { connectModal.classList.add('show'); }
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// 显示连接弹窗
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function hideConnectModal() { connectModal.classList.remove('show'); }
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// 隐藏连接弹窗
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connectBtn.onclick = showConnectModal;
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// 点击连接按钮 -> 显示弹窗
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modalCancel.onclick = hideConnectModal;
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// 点击取消 -> 隐藏弹窗
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modalConnect.onclick = () => {
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// 点击弹窗内「连接」按钮
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const host = hostInput.value.trim();
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// 获取 IP，去空格
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const port = portInput.value || '7003';
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// 获取端口，缺省 7003
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socket.emit('connect_device', { host, port });
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// 向后端发送连接请求
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};
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function sendKey(key) {
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// 发送按键到后端
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if (!connectBtn.classList.contains('connected')) return;
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// 未连接则不发送
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socket.emit('key', { code: KEY_MAP[key] ?? 0 });
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// 根据按键名查协议码并发送
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}
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function doDisconnect() {
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// 执行断开
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socket.emit('disconnect_device');
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// 通知后端断开设备
|
||
connectBtn.classList.remove('connected');
|
||
connectBtn.querySelector('span:last-child').textContent = '连接';
|
||
// 恢复按钮状态和文字
|
||
canvas.style.display = 'none';
|
||
placeholder.style.display = '';
|
||
placeholder.textContent = '点击「连接」连接装置';
|
||
// 隐藏 canvas，显示占位符
|
||
}
|
||
|
||
document.querySelectorAll('.dpad .btn, .action-btn').forEach(btn => {
|
||
// 为所有方向键和动作按钮绑定点击
|
||
btn.onclick = () => sendKey(btn.dataset.key);
|
||
// 点击时发送对应按键码
|
||
});
|
||
document.querySelector('.menu-item.exit').onclick = doDisconnect;
|
||
// 断开按钮 -> 执行断开
|
||
document.getElementById('btnAbout').onclick = () => alert('远程显示工具\n与 RemoDispBus 协议兼容\n端口 7003');
|
||
// 关于按钮 -> 弹出说明
|
||
</script>
|
||
</body>
|
||
</html>
|