bot_dev1
85df71fc28
- 新增OperationDashboard.vue全屏大屏组件 - 添加6个核心KPI指标卡片: 进水总量/出水总量/产销差率/营收额/平均水质/报警次数 - 实现6个ECharts图表: 供水趋势/水质分布/报警统计/管网空间/设备状态/营收分析 - 创建静态HTML版本operation-dashboard.html，使用CDN加载Vue3/ECharts/Element Plus - 更新路由配置，添加/operation路径支持 - 修复nextTick导入问题，优化build脚本 🚧 开发者: bot_dev1 📝 任务: #38 [BI] 运营仪表盘 + 供水专题大屏
55 lines
1.7 KiB
JavaScript
55 lines
1.7 KiB
JavaScript
import defined from "../Core/defined.js";
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/**
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* A policy for discarding tile images that contain no data (and so aren't actually images).
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* This policy discards {@link DiscardEmptyTileImagePolicy.EMPTY_IMAGE}, which is
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* expected to be used in place of any empty tile images by the image loading code.
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*
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* @alias DiscardEmptyTileImagePolicy
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* @constructor
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*
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* @see DiscardMissingTileImagePolicy
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*/
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function DiscardEmptyTileImagePolicy(options) {}
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/**
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* Determines if the discard policy is ready to process images.
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* @returns {boolean} True if the discard policy is ready to process images; otherwise, false.
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*/
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DiscardEmptyTileImagePolicy.prototype.isReady = function () {
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return true;
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};
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/**
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* Given a tile image, decide whether to discard that image.
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*
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* @param {HTMLImageElement} image An image to test.
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* @returns {boolean} True if the image should be discarded; otherwise, false.
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*/
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DiscardEmptyTileImagePolicy.prototype.shouldDiscardImage = function (image) {
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return DiscardEmptyTileImagePolicy.EMPTY_IMAGE === image;
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};
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let emptyImage;
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Object.defineProperties(DiscardEmptyTileImagePolicy, {
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/**
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* Default value for representing an empty image.
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* @type {HTMLImageElement}
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* @readonly
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* @memberof DiscardEmptyTileImagePolicy
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*/
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EMPTY_IMAGE: {
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get: function () {
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if (!defined(emptyImage)) {
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emptyImage = new Image();
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// load a blank data URI with a 1x1 transparent pixel.
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emptyImage.src =
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"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=";
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}
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return emptyImage;
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},
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},
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});
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export default DiscardEmptyTileImagePolicy;
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