显示和选择节点

TreeNode类有一个 ensureVisible 方法,通过根据需要扩展父节点并在必要时将节点滚动到视图中来确保节点可见。

它还有一个 select 方法,显示节点并选择它。

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjNav from '@grapecity/wijmo.nav'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // create the tree var tree = new wjNav.TreeView('#theTree', { itemsSource: getData(), displayMemberPath: 'header', childItemsPath: 'items' }); // // find a node to show var theItem = findItem(tree.itemsSource, 'Work Table'); var theNode = tree.getNode(theItem); // // show or select the node when the user clicks the button document.getElementById('btnShow').addEventListener('click', function () { theNode.ensureVisible(); }); document.getElementById('btnSelect').addEventListener('click', function () { theNode.select(); }); // // utilities function findItem(items, text) { var node = null; for (var i = 0; i < items.length; i++) { var item = items[i]; if (item.header == text) { return item; } if (item.items) { item = findItem(item.items, text); if (item) { return item; } } } return null; // not found } } <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo TreeView Showing and Selection Nodes</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <button id="btnShow" class="btn btn-primary"> Show 'Work Table' Node </button> <button id="btnSelect" class="btn btn-primary"> Select 'Work Table' Node </button> <div id="theTree"></div> </div> </body> </html> // get the tree data export function getData() { return [ { header: 'Electronics', items: [ { header: 'Trimmers/Shavers' }, { header: 'Tablets' }, { header: 'Phones', items: [ { header: 'Apple' }, { header: 'Motorola', newItem: true }, { header: 'Nokia' }, { header: 'Samsung' } ] }, { header: 'Speakers', newItem: true }, { header: 'Monitors' } ] }, { header: 'Toys', items: [ { header: 'Shopkins' }, { header: 'Train Sets' }, { header: 'Science Kit', newItem: true }, { header: 'Play-Doh' }, { header: 'Crayola' } ] }, { header: 'Home', items: [ { header: 'Coffeee Maker' }, { header: 'Breadmaker', newItem: true }, { header: 'Solar Panel', newItem: true }, { header: 'Work Table' }, { header: 'Propane Grill' } ] } ]; } /* default trees on this sample */ .wj-treeview { display:block; height: 350px; font-size: 120%; margin: 8px 0; 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; } import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import { Component, Inject, enableProdMode, NgModule, ViewChild, AfterViewInit } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjNavModule, WjTreeView } from '@grapecity/wijmo.angular2.nav'; import { DataService, TreeItem } from './app.data'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent implements AfterViewInit { @ViewChild('theTree') theTree: WjTreeView; data: TreeItem[]; theItem: any; theNode: any; // constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); } // ngAfterViewInit() { this.theItem = this._findItem(this.theTree.itemsSource, 'Work Table'); this.theNode = this.theTree.getNode(this.theItem); } // onShowNode() { this.theNode.ensureVisible(); } // onSelectNode() { this.theNode.select(); } // _findItem(items: TreeItem[], text: string) { var node = null; for (var i = 0; i < items.length; i++) { var item = items[i]; if (item.header == text) { return item; } if (item.items) { item = this._findItem(item.items, text); if (item) { return item; } } } return null; // not found } } // @NgModule({ imports: [WjNavModule, BrowserModule], declarations: [AppComponent], providers: [DataService], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule); <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo TreeView Showing and Selection Nodes</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/dist/zone.min.js"></script> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.js"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html> <div class="container-fluid"> <button id="btnShow" class="btn btn-primary" (click)="onShowNode()"> Show 'Work Table' Node </button> <button id="btnSelect" class="btn btn-primary" (click)="onSelectNode()"> Select 'Work Table' Node </button> <wj-tree-view #theTree [itemsSource]="data" [displayMemberPath]="'header'" [childItemsPath]="'items'"></wj-tree-view> </div> import { Injectable } from '@angular/core'; export class TreeItem { header: string; newItem?: boolean; items?: TreeItem[] } @Injectable() export class DataService { getData(): TreeItem[] { return [ { header: 'Electronics', items: [ { header: 'Trimmers/Shavers' }, { header: 'Tablets' }, { header: 'Phones', items: [ { header: 'Apple' }, { header: 'Motorola', newItem: true }, { header: 'Nokia' }, { header: 'Samsung' }] }, { header: 'Speakers', newItem: true }, { header: 'Monitors' }] }, { header: 'Toys', items: [ { header: 'Shopkins' }, { header: 'Train Sets' }, { header: 'Science Kit', newItem: true }, { header: 'Play-Doh' }, { header: 'Crayola' }] }, { header: 'Home', items: [ { header: 'Coffeee Maker' }, { header: 'Breadmaker', newItem: true }, { header: 'Solar Panel', newItem: true }, { header: 'Work Table' }, { header: 'Propane Grill' }] } ]; } } /* default trees on this sample */ .wj-treeview { display:block; height: 350px; font-size: 120%; margin: 8px 0; 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; } <template> <div class="container-fluid"> <button id="btnShow" class="btn btn-primary" v-on:click="onShowNode"> Show 'Work Table' Node </button> <button id="btnSelect" class="btn btn-primary" v-on:click="onSelectNode"> Select 'Work Table' Node </button> <wj-tree-view :items-source="data" display-member-path="header" child-items-path="items" :initialized="initTreeView"></wj-tree-view> </div> </template> <script> import 'bootstrap.css'; import "@grapecity/wijmo.styles/wijmo.css"; import Vue from 'vue'; import '@grapecity/wijmo.vue2.nav'; import * as wjCore from '@grapecity/wijmo'; import { getData } from './data'; new Vue({ el: '#app', data: function () { return { data: getData(), theItem: null, theNode: null } }, methods:{ initTreeView: function(ctl){ this.wjTreeViewControl = ctl; }, onShowNode() { this.theNode.ensureVisible(); }, onSelectNode() { this.theNode.select(); }, _findItem(items, text) { var node = null; for (var i = 0; i < items.length; i++) { var item = items[i]; if (item.header == text) { return item; } if (item.items) { item = this._findItem(item.items, text); if (item) { return item; } } } return null; // not found } }, mounted: function(){ this.theItem =this._findItem(this.wjTreeViewControl.itemsSource, 'Work Table'); this.theNode =this.wjTreeViewControl.getNode(this.theItem); } }) </script> <style> .container-fluid .wj-treeview { display:block; font-size: 120%; 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>GrapeCity Wijmo TreeView Showing and Selection Nodes</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app.vue'); </script> </head> <body> <div id="app"> </div> </body> </html> export function getData(){ return [ { header: 'Electronics', img: 'resources/electronics.png', items: [ { header: 'Trimmers/Shavers' }, { header: 'Tablets' }, { header: 'Phones', img: 'resources/phones.png', items: [ { header: 'Apple' }, { header: 'Motorola', newItem: true }, { header: 'Nokia' }, { header: 'Samsung' }] }, { header: 'Speakers', newItem: true }, { header: 'Monitors' }] }, { header: 'Toys', img: 'resources/toys.png', items: [ { header: 'Shopkins' }, { header: 'Train Sets' }, { header: 'Science Kit', newItem: true }, { header: 'Play-Doh' }, { header: 'Crayola' }] }, { header: 'Home', img: 'resources/home.png', items: [ { header: 'Coffeee Maker' }, { header: 'Breadmaker', newItem: true }, { header: 'Solar Panel', newItem: true }, { header: 'Work Table' }, { header: 'Propane Grill' }] } ]; } import './app.css'; import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; // import * as React from 'react'; import * as ReactDOM from 'react-dom'; // import * as wjNav from '@grapecity/wijmo.react.nav'; import { getData } from './data'; class App extends React.Component { constructor(props) { super(props); this.state = { data: getData(), theItem: null, theNode: null }; } initTreeView(ctl) { let item = this.findItem(ctl.itemsSource, 'Work Table'); this.setState({ theItem: item, theNode: ctl.getNode(item) }); } onShowNode() { this.state.theNode.ensureVisible(); } onSelectNode() { this.state.theNode.select(); } findItem(items, text) { var node = null; for (var i = 0; i < items.length; i++) { var item = items[i]; if (item.header == text) { return item; } if (item.items) { item = this.findItem(item.items, text); if (item) { return item; } } } return null; // not found } render() { return (<div className="container-fluid"> <button id="btnShow" className="btn btn-primary" onClick={this.onShowNode.bind(this)}> Show 'Work Table' Node </button> &nbsp; <button id="btnSelect" className="btn btn-primary" onClick={this.onSelectNode.bind(this)}> Select 'Work Table' Node </button> <wjNav.TreeView itemsSource={this.state.data} displayMemberPath="header" childItemsPath="items" initialized={this.initTreeView.bind(this)}></wjNav.TreeView> </div>); } } ReactDOM.render(<App />, document.getElementById('app')); <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>AutoComplete</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html> .container-fluid .wj-treeview { display: block; font-size: 120%; 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; } export function getData() { return [ { header: 'Electronics', img: 'resources/electronics.png', items: [ { header: 'Trimmers/Shavers' }, { header: 'Tablets' }, { header: 'Phones', img: 'resources/phones.png', items: [ { header: 'Apple' }, { header: 'Motorola', newItem: true }, { header: 'Nokia' }, { header: 'Samsung' } ] }, { header: 'Speakers', newItem: true }, { header: 'Monitors' } ] }, { header: 'Toys', img: 'resources/toys.png', items: [ { header: 'Shopkins' }, { header: 'Train Sets' }, { header: 'Science Kit', newItem: true }, { header: 'Play-Doh' }, { header: 'Crayola' } ] }, { header: 'Home', img: 'resources/home.png', items: [ { header: 'Coffeee Maker' }, { header: 'Breadmaker', newItem: true }, { header: 'Solar Panel', newItem: true }, { header: 'Work Table' }, { header: 'Propane Grill' } ] } ]; }