Refreshing Nodes (Vue)

Refresh a TreeNode after its data has changed by call the node's refresh method. This sample demonstrates doing this in comparison to reloading the entire tree.

Learn about Wijmo | TreeView API Reference

This example uses Vue.

app.vue
index.html
data.js
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<template> <div class="container-fluid"> <div class="row"> <div class="col-xs-6"> <wj-tree-view :itemsSource="data" displayMemberPath="header" childItemsPath="items" :initialized="initialized"> </wj-tree-view> </div> <div class="col-xs-6"> <button class="btn btn-default" @click="onItemDataClick">Refresh with given item data</button> <br> <button class="btn btn-default" @click="onItemSourceClick">Refresh with changed itemsSource</button> <br> <button class="btn btn-default" @click="onReloadClick">Re-load the TreeView</button> </div> </div> </div> </template> <script setup> import * as wjCore from "@mescius/wijmo"; import { getData } from "./data"; import { ref } from "vue"; const data = ref(getData()); var control = null; function initialized(sender) { control = sender; control.selectedItem = control.itemsSource[0]; } function onItemDataClick() { control.selectedNode.refresh({ header: "given itemData " + Date.now(), items: [{ header: "first child" }, { header: "second child" }], }); } function onItemSourceClick() { let node = control.selectedNode, arr = node.itemsSource; // arr[node.index] = { header: "updated itemData " + Date.now(), items: [{ header: "first child" }, { header: "second child" }], }; // node.refresh(); } function onReloadClick() { control.loadTree(true); control.selectedItem = control.itemsSource[0]; } </script> <style> .container-fluid .wj-treeview { font-size: 120%; margin-top: 8px; margin-bottom: 8px; padding: 6px; background: #f0f0f0; box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23); } body { margin-bottom: 24pt; } </style>
<template> <div class="container-fluid"> <div class="row"> <div class="col-xs-6"> <wj-tree-view :itemsSource="data" displayMemberPath="header" childItemsPath="items" :initialized="initialized"> </wj-tree-view> </div> <div class="col-xs-6"> <button class="btn btn-default" @click="onItemDataClick">Refresh with given item data</button> <br> <button class="btn btn-default" @click="onItemSourceClick">Refresh with changed itemsSource</button> <br> <button class="btn btn-default" @click="onReloadClick">Re-load the TreeView</button> </div> </div> </div> </template> <script setup> import * as wjCore from "@mescius/wijmo"; import { getData } from "./data"; import { ref } from "vue"; const data = ref(getData()); var control = null; function initialized(sender) { control = sender; control.selectedItem = control.itemsSource[0]; } function onItemDataClick() { control.selectedNode.refresh({ header: "given itemData " + Date.now(), items: [{ header: "first child" }, { header: "second child" }], }); } function onItemSourceClick() { let node = control.selectedNode, arr = node.itemsSource; // arr[node.index] = { header: "updated itemData " + Date.now(), items: [{ header: "first child" }, { header: "second child" }], }; // node.refresh(); } function onReloadClick() { control.loadTree(true); control.selectedItem = control.itemsSource[0]; } </script> <style> .container-fluid .wj-treeview { font-size: 120%; margin-top: 8px; margin-bottom: 8px; padding: 6px; background: #f0f0f0; box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23); } body { margin-bottom: 24pt; } </style>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo TreeView Refreshing Nodes</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="compiler.js" type="module"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app.js'); </script> </head> <body> <div id="app"> </div> </body> </html>
export function getData(){ return [ { header: 'Parent 1', items: [ { header: 'Child 1.1' }, { header: 'Child 1.2' }, { header: 'Child 1.3' }] }, { header: 'Parent 2', items: [ { header: 'Child 2.1' }, { header: 'Child 2.2' }] }, { header: 'Parent 3', items: [ { header: 'Child 3.1' }] } ]; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true }, meta: { '*.css': { loader: 'css' }, '*.vue': { loader: '../plugin-vue/index.js' } //'*.vue': { loader: 'systemjs-plugin-vue' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 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'@vue/runtime-dom':'npm:@vue/runtime-dom/dist/runtime-dom.global.prod.js', '@vue/shared':'npm:@vue/shared/dist/shared.cjs.js', 'vue-loader': 'npm:systemjs-vue-browser/index.js', //'systemjs-plugin-vue': 'npm:systemjs-plugin-vue/index.js', 'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel/systemjs-babel-browser.js' }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'js' }, rxjs: { defaultExtension: 'js' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);