支持小地图

simple-mind-map/index.js

@@ -10,6 +10,7 @@ import BatchExecution from './src/BatchExecution'
 import Export from './src/Export'
 import Select from './src/Select'
 import Drag from './src/Drag'
+import MiniMap from './src/MiniMap';
 import {
     layoutValueList
 } from './src/utils/constant'
@@ -116,6 +117,11 @@ class MindMap {
             draw: this.draw
         })
 
+        // 小地图类
+        this.miniMap = new MiniMap({
+            mindMap: this
+        })
+
         // 导出类
         this.doExport = new Export({
             mindMap: this

simple-mind-map/package.json

@@ -1,6 +1,6 @@
 {
   "name": "simple-mind-map",
-  "version": "0.2.10",
+  "version": "0.2.11",
   "description": "一个简单的web在线思维导图",
   "authors": [
     {

simple-mind-map/src/Export.js

@@ -44,28 +44,9 @@ class Export {
      * @Desc: 获取svg数据 
      */
     async getSvgData() {
-        const svg = this.mindMap.svg
-        const draw = this.mindMap.draw
-        // 保存原始信息
-        const origWidth = svg.width()
-        const origHeight = svg.height()
-        const origTransform = draw.transform()
-        const elRect = this.mindMap.el.getBoundingClientRect()
-        // 去除放大缩小的变换效果
-        draw.scale(1 / origTransform.scaleX, 1 / origTransform.scaleY)
-        // 获取变换后的位置尺寸信息，其实是getBoundingClientRect方法的包装方法
-        const rect = draw.rbox()
-        // 将svg设置为实际内容的宽高
-        svg.size(rect.width, rect.height)
-        // 把实际内容变换
-        draw.translate(-rect.x + elRect.left, -rect.y + elRect.top)
-        // 克隆一份数据
-        const clone = svg.clone()
-        // 恢复原先的大小和变换信息
-        svg.size(origWidth, origHeight)
-        draw.transform(origTransform)
+        let { svg, svgHTML } = this.mindMap.miniMap.getMiniMap()
         // 把图片的url转换成data:url类型，否则导出会丢失图片
-        let imageList = clone.find('image')
+        let imageList = svg.find('image')
         let task = imageList.map(async (item) => {
             let imgUlr = item.attr('href') || item.attr('xlink:href')
             let imgData = await imgToDataUrl(imgUlr)
@@ -73,8 +54,8 @@ class Export {
         })
         await Promise.all(task)
         return {
-            node: clone,
-            str: clone.svg()
+            node: svg,
+            str: svgHTML
         }
     }
 

simple-mind-map/src/MiniMap.js

@@ -0,0 +1,175 @@
+// 小地图类
+class MiniMap {
+  /**
+   * javascript comment
+   * @Author: 王林25
+   * @Date: 2022-10-10 14:00:45
+   * @Desc: 构造函数
+   */
+  constructor(opt) {
+    this.mindMap = opt.mindMap;
+    this.isMousedown = false;
+    this.mousedownPos = {
+      x: 0,
+      y: 0,
+    };
+    this.startViewPos = {
+      x: 0,
+      y: 0,
+    };
+  }
+
+  /**
+   * javascript comment
+   * @Author: 王林25
+   * @Date: 2022-10-10 14:00:43
+   * @Desc:  获取小地图相关数据
+   */
+  getMiniMap() {
+    const svg = this.mindMap.svg;
+    const draw = this.mindMap.draw;
+    // 保存原始信息
+    const origWidth = svg.width();
+    const origHeight = svg.height();
+    const origTransform = draw.transform();
+    const elRect = this.mindMap.el.getBoundingClientRect();
+    // 去除放大缩小的变换效果
+    draw.scale(1 / origTransform.scaleX, 1 / origTransform.scaleY);
+    // 获取变换后的位置尺寸信息，其实是getBoundingClientRect方法的包装方法
+    const rect = draw.rbox();
+    // 将svg设置为实际内容的宽高
+    svg.size(rect.width, rect.height);
+    // 把实际内容变换
+    draw.translate(-rect.x + elRect.left, -rect.y + elRect.top);
+    // 克隆一份数据
+    const clone = svg.clone();
+    // 恢复原先的大小和变换信息
+    svg.size(origWidth, origHeight);
+    draw.transform(origTransform);
+
+    return {
+      svg: clone, // 思维导图图形的整体svg元素，包括：svg（画布容器）、g（实际的思维导图组）
+      svgHTML: clone.svg(), // svg字符串
+      rect: {
+        ...rect, // 思维导图图形未缩放时的位置尺寸等信息
+        ratio: rect.width / rect.height, // 思维导图图形的宽高比
+      },
+      origWidth, // 画布宽度
+      origHeight, // 画布高度
+      scaleX: origTransform.scaleX, // 思维导图图形的水平缩放值
+      scaleY: origTransform.scaleY, // 思维导图图形的垂直缩放值
+    };
+  }
+
+  /**
+   * javascript comment
+   * @Author: 王林25
+   * @Date: 2022-10-10 14:05:51
+   * @Desc: 计算小地图的渲染数据
+   * boxWidth：小地图容器的宽度
+   * boxHeight：小地图容器的高度
+   */
+  calculationMiniMap(boxWidth, boxHeight) {
+    let { svgHTML, rect, origWidth, origHeight, scaleX, scaleY } =
+      this.getMiniMap();
+    // 计算数据
+    let boxRatio = boxWidth / boxHeight;
+    let actWidth = 0;
+    let actHeight = 0;
+    if (boxRatio > rect.ratio) {
+      // 高度以box为准，缩放宽度
+      actHeight = boxHeight;
+      actWidth = rect.ratio * actHeight;
+    } else {
+      // 宽度以box为准，缩放高度
+      actWidth = boxWidth;
+      actHeight = actWidth / rect.ratio;
+    }
+    // svg图形的缩放及位置
+    let miniMapBoxScale = actWidth / rect.width;
+    let miniMapBoxLeft = (boxWidth - actWidth) / 2;
+    let miniMapBoxTop = (boxHeight - actHeight) / 2;
+    // 视口框大小及位置
+    let _rectX = rect.x - (rect.width * scaleX - rect.width) / 2;
+    let _rectX2 = rect.x2 + (rect.width * scaleX - rect.width) / 2;
+    let _rectY = rect.y - (rect.height * scaleY - rect.height) / 2;
+    let _rectY2 = rect.y2 + (rect.height * scaleY - rect.height) / 2;
+    let _rectWidth = rect.width * scaleX;
+    let _rectHeight = rect.height * scaleY;
+    let viewBoxStyle = {
+      left: 0,
+      top: 0,
+      right: 0,
+      bottom: 0,
+    };
+    viewBoxStyle.left =
+      Math.max(0, (-_rectX / _rectWidth) * actWidth) + miniMapBoxLeft + "px";
+    viewBoxStyle.right =
+      Math.max(0, ((_rectX2 - origWidth) / _rectWidth) * actWidth) +
+      miniMapBoxLeft +
+      "px";
+
+    viewBoxStyle.top =
+      Math.max(0, (-_rectY / _rectHeight) * actHeight) + miniMapBoxTop + "px";
+    viewBoxStyle.bottom =
+      Math.max(0, ((_rectY2 - origHeight) / _rectHeight) * actHeight) +
+      miniMapBoxTop +
+      "px";
+    return {
+      svgHTML, // 小地图html
+      viewBoxStyle, // 视图框的位置信息
+      miniMapBoxScale, // 视图框的缩放值
+      miniMapBoxLeft, // 视图框的left值
+      miniMapBoxTop, // 视图框的top值
+    };
+  }
+
+  /**
+   * javascript comment
+   * @Author: 王林25
+   * @Date: 2022-10-10 14:22:40
+   * @Desc: 小地图鼠标按下事件
+   */
+  onMousedown(e) {
+    this.isMousedown = true;
+    this.mousedownPos = {
+      x: e.clientX,
+      y: e.clientY,
+    };
+    // 保存视图当前的偏移量
+    let transformData = this.mindMap.view.getTransformData();
+    this.startViewPos = {
+      x: transformData.state.x,
+      y: transformData.state.y,
+    };
+  }
+
+  /**
+   * javascript comment
+   * @Author: 王林25
+   * @Date: 2022-10-10 14:22:55
+   * @Desc: 小地图鼠标移动事件
+   */
+  onMousemove(e, sensitivityNum = 5) {
+    if (!this.isMousedown) {
+      return;
+    }
+    let ox = e.clientX - this.mousedownPos.x;
+    let oy = e.clientY - this.mousedownPos.y;
+    // 在视图最初偏移量上累加更新量
+    this.mindMap.view.translateXTo(ox * sensitivityNum + this.startViewPos.x);
+    this.mindMap.view.translateYTo(oy * sensitivityNum + this.startViewPos.y);
+  }
+
+  /**
+   * javascript comment
+   * @Author: 王林25
+   * @Date: 2022-10-10 14:23:01
+   * @Desc: 小地图鼠标松开事件
+   */
+  onMouseup() {
+    this.isMousedown = false;
+  }
+}
+
+export default MiniMap;

simple-mind-map/src/View.js

@@ -126,6 +126,17 @@ class View {
         this.transform()
     }
 
+    /** 
+     * javascript comment 
+     * @Author: 王林25 
+     * @Date: 2022-10-10 14:03:53 
+     * @Desc: 平移x方式到 
+     */
+    translateXTo(x) {
+        this.x = x
+        this.transform()
+    }
+
     /** 
      * javascript comment 
      * @Author: 王林25 
@@ -137,6 +148,17 @@ class View {
         this.transform()
     }
 
+    /** 
+     * javascript comment 
+     * @Author: 王林25 
+     * @Date: 2022-10-10 14:04:10 
+     * @Desc: 平移y方向到 
+     */
+    translateYTo(y) {
+        this.y = y
+        this.transform()
+    }
+
     /** 
      * @Author: 王林 
      * @Date: 2021-07-04 17:13:14 

simple-mind-map/src/layouts/MindMap.js

@@ -224,7 +224,7 @@ class MindMap extends Base {
             let y1 = top + height / 2
             let x2 = item.dir === 'left' ? item.left + item.width : item.left
             let y2 = item.top + item.height / 2
-            let path = path = `M ${x1},${y1} L ${x1 + _s},${y1} L ${x1 + _s},${y2} L ${x2},${y2}` 
+            let path = `M ${x1},${y1} L ${x1 + _s},${y1} L ${x1 + _s},${y2} L ${x2},${y2}` 
             lines[index].plot(path)
             style && style(lines[index], item)
         })

web/src/pages/Edit/components/Edit.vue

@@ -2,6 +2,7 @@
   <div class="editContainer">
     <div class="mindMapContainer" ref="mindMapContainer"></div>
     <Count></Count>
+    <Navigator :mindMap="mindMap"></Navigator>
     <NavigatorToolbar :mindMap="mindMap"></NavigatorToolbar>
     <Outline></Outline>
     <Style></Style>
@@ -27,6 +28,7 @@ import ShortcutKey from './ShortcutKey'
 import Contextmenu from './Contextmenu'
 import NodeNoteContentShow from './NodeNoteContentShow.vue'
 import { getData, storeData, storeConfig } from '@/api'
+import Navigator from './Navigator.vue';
 
 /**
  * @Author: 王林
@@ -45,7 +47,8 @@ export default {
     NavigatorToolbar,
     ShortcutKey,
     Contextmenu,
-    NodeNoteContentShow
+    NodeNoteContentShow,
+    Navigator
   },
   data() {
     return {

web/src/pages/Edit/components/Navigator.vue

@@ -0,0 +1,141 @@
+<template>
+  <div
+    v-if="showMiniMap"
+    class="navigatorBox"
+    ref="navigatorBox"
+    @mousedown="onMousedown"
+    @mousemove="onMousemove"
+    @mouseup="onMouseup"
+  >
+    <div
+      class="svgBox"
+      ref="svgBox"
+      :style="{
+        transform: `scale(${svgBoxScale})`,
+        left: svgBoxLeft + 'px',
+        top: svgBoxTop + 'px',
+      }"
+    ></div>
+    <div class="windowBox" :style="viewBoxStyle"></div>
+  </div>
+</template>
+
+<script>
+export default {
+  props: {
+    mindMap: {
+      type: Object,
+    },
+  },
+  data() {
+    return {
+      showMiniMap: false,
+      timer: null,
+      boxWidth: 0,
+      boxHeight: 0,
+      svgBoxScale: 1,
+      svgBoxLeft: 0,
+      svgBoxTop: 0,
+      viewBoxStyle: {
+        left: 0,
+        top: 0,
+        bottom: 0,
+        right: 0,
+      },
+    };
+  },
+  mounted() {
+    this.$bus.$on("toggle_mini_map", (show) => {
+      this.showMiniMap = show;
+      this.$nextTick(() => {
+        this.init();
+        this.drawMiniMap();
+      });
+    });
+    this.$bus.$on("data_change", () => {
+      if (!this.showMiniMap) {
+        return;
+      }
+      clearTimeout(this.timer);
+      this.timer = setTimeout(() => {
+        this.drawMiniMap();
+      }, 500);
+    });
+    this.$bus.$on("view_data_change", () => {
+      if (!this.showMiniMap) {
+        return;
+      }
+      clearTimeout(this.timer);
+      this.timer = setTimeout(() => {
+        this.drawMiniMap();
+      }, 500);
+    });
+  },
+  methods: {
+    init() {
+      let { width, height } = this.$refs.navigatorBox.getBoundingClientRect();
+      this.boxWidth = width;
+      this.boxHeight = height;
+    },
+
+    drawMiniMap() {
+      let {
+        svgHTML,
+        viewBoxStyle,
+        miniMapBoxScale,
+        miniMapBoxLeft,
+        miniMapBoxTop,
+      } = this.mindMap.miniMap.calculationMiniMap(
+        this.boxWidth,
+        this.boxHeight
+      );
+      // 渲染到小地图
+      this.$refs.svgBox.innerHTML = svgHTML;
+      this.viewBoxStyle = viewBoxStyle;
+      this.svgBoxScale = miniMapBoxScale;
+      this.svgBoxLeft = miniMapBoxLeft;
+      this.svgBoxTop = miniMapBoxTop;
+    },
+
+    onMousedown(e) {
+      this.mindMap.miniMap.onMousedown(e);
+    },
+
+    onMousemove(e) {
+      this.mindMap.miniMap.onMousemove(e);
+    },
+
+    onMouseup(e) {
+      this.mindMap.miniMap.onMouseup(e);
+    },
+  },
+};
+</script>
+
+<style lang="less" scoped>
+.navigatorBox {
+  position: absolute;
+  width: 350px;
+  height: 220px;
+  background-color: #fff;
+  bottom: 80px;
+  right: 20px;
+  box-shadow: 0 0 16px #989898;
+  border-radius: 4px;
+  border: 1px solid #eee;
+  cursor: pointer;
+  user-select: none;
+
+  .svgBox {
+    position: absolute;
+    left: 0;
+    transform-origin: left top;
+  }
+
+  .windowBox {
+    position: absolute;
+    border: 2px solid rgb(238, 69, 69);
+    transition: all 0.3s;
+  }
+}
+</style>

web/src/pages/Edit/components/NavigatorToolbar.vue

@@ -1,5 +1,8 @@
 <template>
   <div class="navigatorContainer">
+    <div class="item">
+      <el-checkbox v-model="openMiniMap" @change="toggleMiniMap">开启小地图</el-checkbox>
+    </div>
     <div class="item">
       <el-switch
         v-model="isReadonly"
@@ -40,12 +43,17 @@ export default {
   },
   data () {
     return {
-      isReadonly: false
+      isReadonly: false,
+      openMiniMap: false
     }
   },
   methods: {
     readonlyChange(value) {
       this.mindMap.setMode(value ? 'readonly' : 'edit')
+    },
+
+    toggleMiniMap(show) {
+      this.$bus.$emit('toggle_mini_map', show)
     }
   }
 };