emis-frontend/src/views/emis/emisTransPlanRuleTopoGraph/index.vue

<template>
    <div class="app-container">
        <!-- 查询 -->
        <SearchForm slot="pageHeader" :model="queryParams" ref="queryForm" size="mini" :maxShow="30" label-width="68px"
            v-show="showSearch" @search="handleQuery" @reset="resetQuery">
            <!-- 线路查询 -->
            <el-form-item label="线路" prop="lineCode">
                <TransLineAllPicker v-model="queryParams.lineCode" isInitiated="true"></TransLineAllPicker>
            </el-form-item>
            <el-form-item label="产品类型" prop="productType">
                <TransProductAllPicker placeholder="产品类型" v-model="queryParams.productType"
                    :transLineCode="queryParams.lineCode" @onChange="onProductChange"></TransProductAllPicker>
            </el-form-item>
            <el-form-item label="始发网点" prop="startSiteCode">
                <EmisSiteSimplePicker placeholder="始发网点" v-model="queryParams.startSiteCode"></EmisSiteSimplePicker>
            </el-form-item>
        </SearchForm>
        <div slot="toolbar">
            <el-row :gutter="10" class="mb8">
                <el-col :span="1.5">
                    <el-button type="warning" plain icon="el-icon-download" size="mini"
                        @click="exportImage">导 出</el-button>
                </el-col>
            </el-row>
        </div>
        <div id="container">
            <!-- mini 地图 -->
            <div class="minimap-container" id="minimap"></div>
        </div>
    </div>
</template>

<script>
import G6 from "@antv/g6";
import TransLineAllPicker from '@/views/emis/EmisBaseTools/TransLineAllPicker.vue';
import TransProductAllPicker from '@/views/emis/EmisBaseTools/TransProductAllPicker.vue';

import EmisSiteSimplePicker from '@/views/emis/EmisBaseTools/EmisSiteSimplePicker.vue';

import { emisTransPlanRuleTree } from "@/api/emis/emisTransPlanRule";
export default {
    name: "EmisTransPlanRuleTopoGraph",
    components: {
        TransLineAllPicker,
        TransProductAllPicker,
        EmisSiteSimplePicker
    },
    data() {
        return {
            treeData: {},
            graph: null,
            queryParams: {
                pageNum: 1,
                pageSize: 50,
                lineCode: "",
                productType: "",
                productName: '',
                startSiteCode: ''
            },
            // 显示搜索条件
            showSearch: true,
            //节点操作菜单
            descriptionDiv: null,
        };
    },


    mounted() {
        // 注册自定义缩放行为
        G6.registerBehavior("fixed-zoom-canvas", {
            getEvents() {
                return {
                    wheel: "onWheel",
                    mousewheel: "onWheel",
                    touchmove: "onTouchMove",
                    touchstart: "onTouchStart",
                    touchend: "onTouchEnd",
                };
            },

            // 设置 passive 为 false
            getDefaultCfg() {
                return {
                    direction: "both",
                    sensitivity: 1,
                    minZoom: 0.2,
                    maxZoom: 10,
                    // 关键配置：禁用被动事件监听器
                    wheelEvent: { passive: false },
                    touchEvent: { passive: false },
                };
            },

            // 处理滚轮事件
            onWheel(e) {
                // 阻止默认行为
                // e.preventDefault();

                // 调用原始缩放逻辑
                const self = this;
                const graph = self.graph;
                const point = { x: e.clientX, y: e.clientY };
                const canvasPoint = graph.getPointByClient(point.x, point.y);

                // 缩放逻辑...
                const zoom = e.deltaY > 0 ? 0.9 : 1.1;
                graph.zoom(zoom, { x: canvasPoint.x, y: canvasPoint.y });
            },

            // 处理触摸事件
            onTouchMove(e) {
                e.preventDefault();
                // 触摸移动逻辑...
            },
        });

        // this.splitChild(this.treeData);
        this.drawTreeGraph();


    },
    beforeRouteEnter(to, from, next) {
        // 组件创建前 保存当前背景颜色
        document.documentElement.style.overflow = 'hidden';
        next();
    },
    beforeRouteLeave(to, from, next) {
        // 组件销毁前 恢复样式
        document.documentElement.style.overflow = '';
        next();
    },
    methods: {
        /** 搜索按钮操作 */
        handleQuery() {
            this.getTreeData();
        },
        /** 重置按钮操作 */
        resetQuery() {
            this.queryParams = {
                pageNum: 1,
                pageSize: 50,
                lineCode: "",
                productType: "",
                productName: ''
            }
        },
        onProductChange(item) {
            if (item) {
                this.queryParams.productName = item.prodName;
            }
        },
        drawTreeGraph() {
            // 节点操作菜单
            const contextMenu = new G6.Menu({
            getContent(evt) {
                return `
                        <h3>操作节点</h3>
                        <button class='edit-btn'>编辑</button>
                        <button class='del-btn'>删除</button>
                        `;
            },
            handleMenuClick: (target, item) => {
                console.log(target, item);
            },
            // offsetX and offsetY include the padding of the parent container
            // 需要加上父级容器的 padding-left 16 与自身偏移量 10
            offsetX: 16 + 10,
            // 需要加上父级容器的 padding-top 24 、画布兄弟元素高度、与自身偏移量 10
            offsetY: 0,
            // the types of items that allow the menu show up
            // 在哪些类型的元素上响应
            itemTypes: ['node', 'edge', 'canvas'],
            });

            const minimap = new G6.Minimap({
            container:'minimap',
            size: [190, 190],
            type: 'delegate',
               delegateStyle: {
              // 代理元素样式配置
              fill: '#b12d29',     // 填充色（半透明白色）
            //   stroke: 'black',                     // 描边色（蓝色）
               }
            });
            this.graph = new G6.TreeGraph({
                container,
                width: document.getElementById('container').clientWidth, //画布宽度等于浏览器宽度
                height: document.getElementById('container').clientHeight, //画布高度等于浏览器高度
                fitView: false,
                // fitViewPadding: [10, 50, 10, 50],
                animate: true,
                // plugins: [this.treeTooltip(), this.contextMenu],
                plugins: [this.treeTooltip(), minimap],
                defaultNode: {
                    type: "rect",
                    size: [250, 80],
                    collapsed: false, // false 展开  true 收起
                    style: {
                        // fill: "#fff",
                        // lineWidth: 2,
                        // cursor: "pointer",
                    },
                    // labelCfg: {
                    //     position: "right",
                    //     offset: 10,
                    //     style: {
                    //         fill: "#333",
                    //         fontSize: 20,
                    //         stroke: "#fff",
                    //         background: {
                    //             fill: "#ffffff",
                    //             padding: [2, 2, 2, 2],
                    //         },
                    //     },
                    // },
                    anchorPoints: [
                        [0, 0.5],
                        [1, 0.5],
                    ],
                    icon: {
                        show: true,
                        width: 25,
                        height: 25,
                    },
                },
                defaultEdge: {
                    // type: "cubic-horizontal",
                    type: "polyline",
                    style: {
                        endArrow: true
                    },
                    labelCfg: {
                        position: "end",
                        refX: -15,
                        style: {
                            fontSize: 16,
                            background: {
                                fill: "#ffffff",
                                padding: [2, 2, 2, 2],
                            },
                        },
                    },
                },
                nodeStateStyles: {
                    closest: {
                        fill: '#f00',
                    },
                },
                modes: {
                    default: [
                        {
                            type: "collapse-expand",
                            onChange: function onChange(item, collapsed) {
                                const data = item?.get("model");
                                data.collapsed = collapsed;
                                const model = {
                                    id: data.id,
                                    // labelCfg: { position: !collapsed ? "top" : "right" },
                                };
                                item.update(model);
                                item.refresh();
                                return true;
                            },
                        },
                        "drag-canvas",
                        "fixed-zoom-canvas",
                        "drag-node",
                        // {
                        //     type: 'drag-node',
                        //     enableDelegate: true,
                        // }
                    ],
                },
                layout: {
                    type: "compactBox",
                    direction: "LR",
                    getHeight: function getHeight() {
                        return 30;
                    },
                    getWidth: function getWidth() {
                        return 16;
                    },
                    getVGap: function getVGap() {
                        return 30;
                    },
                    getHGap: function getHGap() {
                        return 150; // 节点水平间距
                    },
                },
                //选中节点
                nodeStateStyles: {
                    active: {
                        // fill: "l(0) 0:#FF4500 1:#32CD32",
                        // stroke: "l(0) 0:#FF4500 1:#32CD32",
                        // fill: "#B12D29",
                        // stroke:"#B12D29",
                        // lineWidth: 5,
                    },
                    selected: {
                        // fill: "l(0) 0:#FF4500 1:#32CD32",
                        // fill: "#B12D29",
                        stroke: "#B12D29",
                        lineWidth: 3,
                    },
                },
            });

            this.graph.node((node) => {
                if (!node.id.includes("expand")) {
                    return {
                        label: node.label || this.formatLabel(node),
                        icon: this.formatIcon(node),
                        size: node.size || 40,
                        // labelCfg: { position: this.setLabelPos(node) },
                        style: {
                            // fill: this.getNodeColor(),
                            stroke: '#B12D29',

                        },
                    };
                } else {
                    return {
                        // label: node.label || this.formatLabel(node),
                        label: '更多...',
                        icon: this.formatIcon(node),
                        size: 50,
                        type: 'circle',
                        // labelCfg: { position: this.setLabelPos(node) },
                        labelCfg: { position: 'right' },
                        style: {
                            // fill: this.getNodeColor(),
                            fill: '#B12D29',
                            stroke: '#B12D29',
                        },
                    };
                }
            });
            let selfGrowthNum = 0;
            this.graph.edge((edge) => {
                // let {source, target } = edge   // 也可以根据 link的属性不同自定义 连线颜色和label颜色，因为是测试数据，因此就用一个自增长的数判断奇偶性来进行区分，以便明白其中定制化的方法
                selfGrowthNum++;
                return {
                    style: {
                        opacity: 0.5,
                        // stroke: selfGrowthNum % 2 ? "#ADD8E6" : "#FFDEAD",
                        stroke: '#B12D29',
                        lineWidth: 2,
                    },
                    labelCfg: {
                        position: "end",
                        style: {
                            fontSize: 16,
                            fill: selfGrowthNum % 2 ? "#ADD8E6" : "#FFDEAD",
                        },
                    },
                    // label: selfGrowthNum % 2 ? "even" : "odd",  //边标签
                };
            });

            this.graph.on("node:mouseenter", (evt) => {
                const { item } = evt;
                // this.graph.setItemState(item, "active", true);
            });

            this.graph.on("node:mouseleave", (evt) => {
                const { item } = evt;
                // this.graph.setItemState(item, "active", false);
            });

            const animateCfg = { duration: 200, easing: "easeCubic" };
            this.graph.on("node:click", (evt) => {
                const { item } = evt;
                const node = item?.get("model");
                //点击更多 显示锁起来的下一层节点
                if (node.id.includes("expand")) {
                    const parentNode = this.graph.getNeighbors(item, "source")[0].get("model");
                    this.graph.updateChildren(parentNode.childrenBak, parentNode.id);
                }
                setTimeout(() => {
                    if (!node.id.includes("expand")) {
                        this.graph.focusItem(item, true, animateCfg);
                        this.graph.getNodes().forEach((node) => {
                            this.graph.clearItemStates(node);
                        });
                        this.graph.setItemState(item, "selected", true);
                    }
                }, 500);
            });

            this.graph.on("canvas:click", () => {
                this.graph.getNodes().forEach((node) => {
                    this.graph.clearItemStates(node);
                });
            });
            let minDisNode;
            this.graph.on('node:dragstart', (e) => {
                console.log('dragstart')
                minDisNode = undefined;
            });
            this.graph.on('node:drag', (e) => {
                console.log('node:drag')
                minDisNode = undefined;
                const item = e.item;
                const model = item.getModel();
                const nodes = this.graph.getNodes();
                let minDis = Infinity;
                nodes.forEach((inode) => {
                    this.graph.setItemState(inode, 'closest', false);
                    const node = inode.getModel();
                    if (node.id === model.id) return;
                    const dis = (node.x - e.x) * (node.x - e.x) + (node.y - e.y) * (node.y - e.y);
                    if (dis < minDis) {
                        minDis = dis;
                        minDisNode = inode;
                    }
                });
                // console.log('minDisNode1', minDisNode);
                // if (minDis < 2000) 
                this.graph.setItemState(minDisNode, 'closest', true);
                // else minDisNode = undefined;
                // console.log('minDisNode2',minDisNode)
            }); 
            // 节点拖动
            // this.graph.on('node:dragend', (e) => {
            //     // console.log('dragend')
            //     const descriptionDiv = document.createElement('div');
            //     descriptionDiv.innerHTML =
            //         'Move a subtree to a new parent by dragging the root node of the subtree.';
            //     container.appendChild(descriptionDiv);
            //     // console.log('minDisNode', minDisNode)
            //     if (!minDisNode) {
            //         descriptionDiv.innerHTML = 'Failed. No node close to the dragged node.';
            //         return;
            //     }
            //     const item = e.item;
            //     const id = item.getID();
            //     const data = this.graph.findDataById(id);
            //     // if the minDisNode is a descent of the dragged node, return
            //     let isDescent = false;
            //     const minDisNodeId = minDisNode.getID();
            //     // console.log('dragend', minDisNodeId, isDescent, data, id);
            //     console.log('目的节点==》',this.graph.findDataById(minDisNodeId)) //目的节点
            //     console.log('拖动节点==》', this.graph.findDataById(id)) //拖动节点
            //     G6.Util.traverseTree(data, (d) => {
            //         if (d.id === minDisNodeId) isDescent = true;
            //     });
            //     if (isDescent) {
            //         descriptionDiv.innerHTML = 'Failed. The target node is a descendant of the dragged node.';
            //         return;
            //     }
            //     this.graph.removeChild(id);

            //     setTimeout(() => {
            //         const newParentData = this.graph.findDataById(minDisNodeId);
            //         let newChildren = newParentData.children;
            //         if (newChildren) newChildren.push(data);
            //         else newChildren = [data];
            //         this.graph.updateChildren(newChildren, minDisNodeId);
            //         descriptionDiv.innerHTML = 'Success.';
            //     }, 600);
            // });
            // this.graph.data(this.treeData);
            // this.graph.render();
            this.graph.zoom(0.9);
            this.graph.fitCenter();
            this.graph.get("canvas").set("localRefresh", false);
        },
        // label 过长截断 显示...
        formatLabel(node) {
            const hasChildren = node.childrenBak?.length || node.children?.length;
            // const ellipsis = node.id.length > 15 ? "..." : "";
            return `${this.labelStr(node)}`;
        },

        // 叶子节点 图标处理  截取ID 前两个字符串
        formatIcon(node) {
            if (node.id) {
                node.icon = {
                    // text: node.id.slice(0, 2),
                    text: '+',
                    fill: "#fff",
                    stroke: "#fff",
                    textBaseline: "middle",
                    fontSize: 20,
                    width: 25,
                    height: 25,
                    show: true,
                };
            }
        },

        // 叶子节点 背景颜色随机填充
        getNodeColor() {
            const colors = ["#8470FF", "#A020F0", "#C0FF3E", "#FF4500", "#66d6d1"];
            return colors[Math.floor(Math.random() * colors.length)];
        },

        // 根据节点展开收起状态 动态变更 label 显示位置，展开时在上，收起时在右
        setLabelPos(node) {
            return !node.collapsed && node.children?.length ? "top" : "right";
        },
        // label 显示... 时，显示提示 tip
        treeTooltip() {
            return new G6.Tooltip({
                offsetX: 10,
                offsetY: 20,
                shouldBegin(e) {
                    // return e.item?.get("model")?.label?.includes("...");
                    return e.item._cfg.model.label;
                },
                getContent(e) {
                    if (e.item._cfg.model.startSiteName) {
                        return `<div class="tooltip">
                                <div>${e.item._cfg.model.startSiteName}->${e.item._cfg.model.nextSiteName}</div>
                                <div>${e.item._cfg.model.supplierName || ''}</div>
                            </div>`
                    } else {
                        return '';
                    }
                },
                itemTypes: ["node"],
            });
        },

        // 叶子节点超过 5(xxx)条, 折叠叶子节点，显示展开更多
        splitChild(node) {
            node.childrenBak = node.children ? [...node.children] : [];
            let result = [];

            if (node.children) {
                result = node.children.slice(0, 2);
                if (node.children.length > 2) {
                    // result.push({ id: `expand-${node.id}`, label: " 展开更多..." });
                    result.push({ id: `expand-${node.id}`, label: "" });
                }
                node.children = result;
                node.children.forEach((child) => {
                    this.splitChild(child);
                });
            }
        },
        processTree(nodes) {
            return nodes.map(node => {
                // const currentPath = parentPath ? `${parentPath}/${node.name}` : node.name;
                const newNode = { ...node, id: node.treeId };


                if (node.children) {
                    newNode.children = this.processTree(node.children);
                }

                return newNode;
            });
        },
        //获取树形数据
        async getTreeData() {
            const loadingInstance = this.$loading({
                text: "正在加载...",
            });
            this.list = [];
            this.edges = [];
            const res = await emisTransPlanRuleTree(this.queryParams); //测试数据
            this.treeData = res.rows;

            //获取产品下的网点
            // let { list: newlist, edges: newEdges } = this.treeDataToNodelist(
            //   this.treeData,
            //   this.queryParams.productType,
            // );
            this.treeData = { "id": '1', "label": this.queryParams.productName, "x": 500, "y": 500, "children": this.processTree(this.treeData) }
            // 折叠节点
            this.splitChild(this.treeData);
            this.graph.data(this.treeData);
            this.graph.render();
            this.graph.fitCenter();
            // setTimeout(() => {
            //   this.list = this.list.concat(newlist);
            //   this.edges = this.edges.concat(newEdges);
            //   this.graph.data({
            //     nodes: this.list, 
            //     edges: this.edges,
            //   });
            //   this.graph.render();
            // }, 500);
            loadingInstance.close();
        },
        //格式化标签
        labelStr(node) {
            let str;
            const hasChildren = node.childrenBak?.length || node.children?.length || 0;
            if (node.startSiteName) {
                str = `${node.startSiteName}->${node.nextSiteName}\n${node.supplierName ? node.supplierName.replace(/(.{20})/g, '$1\n') : ''} \n (${hasChildren})`
            } else {
                str = node.label;
            }
            return str;
        },
        async exportImage() {

        this.graph.toFullDataURL((res) => {
        // 为了防止下载的图片影响到G6显示，这里作一个深度拷贝 
        const canvas = document.getElementById('container').childNodes[1].cloneNode(true);
        console.log('canvas',document.getElementById('container').childNodes);
        const img = new Image();
        img.onload = function () {
            canvas.width = img.width + 32;
            canvas.height = img.height + 32;
            const ctx = canvas.getContext('2d');
            ctx.fillStyle = '#fff';
            ctx.fillRect(0, 0, canvas.width, canvas.height);
            ctx.drawImage(img, 16, 16);
            // 下载
            const oA = document.createElement('a');
            oA.download = '组批次规则图';
            oA.href = canvas.toDataURL('image/png');
            document.body.appendChild(oA);
            oA.click();
            oA.remove(); // 下载之后把创建的元素删除
        };
        img.src = res;
        }, 'image/png', {
        imageConfig: {
            padding: 16
        }
        });
        }

    }
}


</script>
<style scoped>
#container {
    touch-action: none;
    /* 禁用默认触摸滚动 */
    width: 100%;
    height: calc(100vh - 150px);
    border: 1px solid #ccc;
    position: relative;
}
.minimap-container {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 200px;
    height: 200px;
    border: 1px solid #ccc;
}


#container>>>.g6-component-tooltip {
    background: #333;
    color: #fff;
    padding: 10px;
}
.minimap-container >>>.g6-minimap-viewport {
    outline: 2px solid black !important;
}
/* canvas {
    cursor: pointer !important;
} */
.minimap-container {
 margin: 0;
}
</style>