什么是思维导图?怎么在小程序中绘制思维导图?下面本篇文章给大家介绍一下使用F6在小程序中绘制思维导图的方法,希望对大家有所帮助!
什么是思维导图?
思维导图是由英国的托尼·博赞于1970年代提出的一种辅助思考工具。以目标主题为中心节点不断向外延展关联,不断分解和探索,最终形成一张完整的树状图。从具体的操作过程来看,也可以理解为对探索过程的可视化,完整记录了每一次关联的结果。这种形式更加符合人的思考方式,最后的图也让我们对主题更有体感和整体的了解。
正因为思维导图的关注点在于思考,而我们的正常活动离不开思考,所以思维导图有非常广泛的使用场景。比如总结归纳、报告演示、头脑风暴等。实施起来只需要纸笔足以,当然也有丰富的在线、独立应用可以支持到图的制作。如果我们的产品需要展示围绕一个主题的多层关联信息的时候,便可以采用思维导图的形式。F6可以很方便地在小程序中绘制脑图,比如上图的效果,有相关需求的同学值得一试。【相关学习推荐:小程序开发教程】
F6中如何绘制
演示示例可以参考f6.antv.vision/zh/docs/exa…本节代码已经开源,感兴趣可以查看
支付宝中
首先安装
npm install @antv/f6 @antv/f6-alipay -S
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data.js
export default { id: 'Modeling Methods', children: [ { id: 'Classification', children: [ { id: 'Logistic regression', }, { id: 'Linear discriminant analysis', }, { id: 'Rules', }, { id: 'Decision trees', }, { id: 'Naive Bayes', }, { id: 'K nearest neighbor', }, { id: 'Probabilistic neural network', }, { id: 'Support vector machine', }, ], }, { id: 'Consensus', children: [ { id: 'Models diversity', children: [ { id: 'Different initializations', }, { id: 'Different parameter choices', }, { id: 'Different architectures', }, { id: 'Different modeling methods', }, { id: 'Different training sets', }, { id: 'Different feature sets', }, ], }, { id: 'Methods', children: [ { id: 'Classifier selection', }, { id: 'Classifier fusion', }, ], }, { id: 'Common', children: [ { id: 'Bagging', }, { id: 'Boosting', }, { id: 'AdaBoost', }, ], }, ], }, { id: 'Regression', children: [ { id: 'Multiple linear regression', }, { id: 'Partial least squares', }, { id: 'Multi-layer feedforward neural network', }, { id: 'General regression neural network', }, { id: 'Support vector regression', }, ], }, ], };
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index.json
{ "defaultTitle": "mindMap", "usingComponents": { "f6-canvas": "@antv/f6-alipay/es/container/container" } }
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index.js
import F6 from '@antv/f6'; import TreeGraph from '@antv/f6/dist/extends/graph/treeGraph'; import { wrapContext } from '../../../common/utils/context'; import data from './data'; /** * 脑图-自节点自动两侧分布 */ Page({ canvas: null, ctx: null, renderer: '', // mini、mini-native等,F6需要,标记环境 isCanvasInit: false, // canvas是否准备好了 graph: null, data: { width: 375, height: 600, pixelRatio: 2, forceMini: false, }, onLoad() { // 注册自定义树,节点等 F6.registerGraph('TreeGraph', TreeGraph); // 同步获取window的宽高 const { windowWidth, windowHeight, pixelRatio } = my.getSystemInfoSync(); this.setData({ width: windowWidth, height: windowHeight, pixelRatio, }); }, /** * 初始化cnavas回调,缓存获得的context * @param {*} ctx 绘图context * @param {*} rect 宽高信息 * @param {*} canvas canvas对象,在render为mini时为null * @param {*} renderer 使用canvas 1.0还是canvas 2.0,mini | mini-native */ handleInit(ctx, rect, canvas, renderer) { this.isCanvasInit = true; this.ctx = wrapContext(ctx); this.renderer = renderer; this.canvas = canvas; this.updateChart(); }, /** * canvas派发的事件,转派给graph实例 */ handleTouch(e) { this.graph && this.graph.emitEvent(e); }, updateChart() { const { width, height, pixelRatio } = this.data; // 创建F6实例 this.graph = new F6.TreeGraph({ context: this.ctx, renderer: this.renderer, width, height, pixelRatio, fitView: true, modes: { default: [ { type: 'collapse-expand', onChange: function onChange(item, collapsed) { const model = item.getModel(); model.collapsed = collapsed; return true; }, }, 'drag-canvas', 'zoom-canvas', ], }, defaultNode: { size: 26, anchorPoints: [ [0, 0.5], [1, 0.5], ], }, defaultEdge: { type: 'cubic-horizontal', }, layout: { type: 'mindmap', direction: 'H', getHeight: function getHeight() { return 16; }, getWidth: function getWidth() { return 16; }, getVGap: function getVGap() { return 10; }, getHGap: function getHGap() { return 50; }, }, }); let centerX = 0; this.graph.node(function(node) { if (node.id === 'Modeling Methods') { centerX = node.x; } // position的取值(由于ESlint禁止嵌套的三元表达,所以单独提取出来写) let position_value = null; if (node.children && node.children.length > 0) { position_value = 'left'; } else if (node.x > centerX) position_value = 'right'; else position_value = 'left'; return { label: node.id, labelCfg: { offset: 5, position: position_value, }, }; }); this.graph.data(data); this.graph.render(); this.graph.fitView(); }, });
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index.axml
<f6-canvas width="{{width}}" height="{{height}}" forceMini="{{forceMini}}" pixelRatio="{{pixelRatio}}" onTouchEvent="handleTouch" onInit="handleInit" ></f6-canvas>
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微信中
首先安装
npm install @antv/f6-wx -S
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@antv/f6-wx
由于微信对npm包不是很友好,所以我们分装了 @antv/f6-wx
帮助用户简化操作。
data.js同上
index.json
{ "defaultTitle": "脑图", "usingComponents": { "f6-canvas": "@antv/f6-wx/canvas/canvas" } }
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index.wxml
<f6-canvas width="{{width}}" height="{{height}}" forceMini="{{forceMini}}" pixelRatio="{{pixelRatio}}" bind:onTouchEvent="handleTouch" bind:onInit="handleInit" ></f6-canvas>
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index.js
import F6 from '@antv/f6-wx'; import TreeGraph from '@antv/f6-wx/extends/graph/treeGraph'; import data from './data'; /** * 脑图-自节点自动两侧分布 */ Page({ canvas: null, ctx: null, renderer: '', // mini、mini-native等,F6需要,标记环境 isCanvasInit: false, // canvas是否准备好了 graph: null, data: { width: 375, height: 600, pixelRatio: 1, forceMini: false, }, onLoad() { // 注册自定义树,节点等 F6.registerGraph('TreeGraph', TreeGraph); // 同步获取window的宽高 const { windowWidth, windowHeight, pixelRatio } = wx.getSystemInfoSync(); this.setData({ width: windowWidth, height: windowHeight, // pixelRatio, }); }, /** * 初始化cnavas回调,缓存获得的context * @param {*} ctx 绘图context * @param {*} rect 宽高信息 * @param {*} canvas canvas对象,在render为mini时为null * @param {*} renderer 使用canvas 1.0还是canvas 2.0,mini | mini-native */ handleInit(event) { const {ctx, rect, canvas, renderer} = event.detail this.isCanvasInit = true; this.ctx = ctx; this.renderer = renderer; this.canvas = canvas; this.updateChart(); }, /** * canvas派发的事件,转派给graph实例 */ handleTouch(e) { this.graph && this.graph.emitEvent(e.detail); }, updateChart() { const { width, height, pixelRatio } = this.data; // 创建F6实例 this.graph = new F6.TreeGraph({ context: this.ctx, renderer: this.renderer, width, height, pixelRatio, fitView: true, modes: { default: [ { type: 'collapse-expand', onChange: function onChange(item, collapsed) { const model = item.getModel(); model.collapsed = collapsed; return true; }, }, 'drag-canvas', 'zoom-canvas', ], }, defaultNode: { size: 26, anchorPoints: [ [0, 0.5], [1, 0.5], ], }, defaultEdge: { type: 'cubic-horizontal', }, layout: { type: 'mindmap', direction: 'H', getHeight: function getHeight() { return 16; }, getWidth: function getWidth() { return 16; }, getVGap: function getVGap() { return 10; }, getHGap: function getHGap() { return 50; }, }, }); let centerX = 0; this.graph.node(function(node) { if (node.id === 'Modeling Methods') { centerX = node.x; } // position的取值(由于ESlint禁止嵌套的三元表达,所以单独提取出来写) let position_value = null; if (node.children && node.children.length > 0) { position_value = 'left'; } else if (node.x > centerX) position_value = 'right'; else position_value = 'left'; return { label: node.id, labelCfg: { offset: 5, position: position_value, }, }; }); this.graph.data(data); this.graph.render(); this.graph.fitView(); }, });
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对于思维导图,或者图可视化感兴趣,都可以添加我的微信 openwayne
进入我们的微信群讨论。
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