タグボックスコントロールでは、ドロップダウンリストをツリーとして表示されるときに、子階層のデータを動的に読み込む（遅延読み込み）ことが可能です。
概要
遅延読み込み（Lazy Load）を使用する場合、子階層のコレクション（children）を空の配列 [] に設定し、コンストラクタdropDownTreeConfigのloadオプションを設定します。コールバック処理にcontext.itemで読み込まれる子ノードの項目を示し、ルードノードを読み込む場合はcontext.itemがnullになります。
以下のサンプルコードでは、折りたたまれた親ノードをクリックすると、遅延読み込みでダミーの子ノードが読み込まれて展開される処理を示しています。
import { bootstrapApplication } from '@angular/platform-browser';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { InputManModule } from "@mescius/inputman.angular";
import '@mescius/inputman/CSS/gc.inputman-js.css';
import { Component, enableProdMode } from '@angular/core';
import GC from '@mescius/inputman';
@Component({
selector: 'app-component',
templateUrl: './src/app.component.html',
imports: [InputManModule, BrowserModule, FormsModule],
standalone: true
})
export class AppComponent {
ngOnInit(): void {
GC.InputMan.appearanceStyle = GC.InputMan.AppearanceStyle.Modern;
}
public gcTagBoxConfig: GC.InputMan.TagBoxConfig = {
dropDownType: GC.InputMan.TagBoxDropDownType.Tree,
tagTextMemberPath: 'text',
dropDownTreeConfig: {
load: (context) => {
let children;
if (context.item === null) {
children = [
{ text: '項目1', children: [] },
{ text: '項目2', children: [] },
];
} else {
children = [
{ text: (context.item as any).text + '.子項目1', children: [] },
{ text: (context.item as any).text + '.子項目2', children: [] },
];
}
setTimeout(() => context.callback(children), 500);
},
},
allowDropDownResize: true,
}
}
enableProdMode();
bootstrapApplication(AppComponent).catch(err => console.error(err));
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>タグボックスコントロール - ツリービュー - 遅延読み込み</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/fesm2015/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
window.onload = function() {
System.import('rxjs').then(function (m) {
System.import('@angular/compiler');
System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators));
System.import('./src/app.component');
});
}
</script>
</head>
<body style="min-height: 300px;">
<app-component></app-component>
</body>
</html>
<div>
遅延読み込み<br>
<gc-tag-box
class="custom"
[dropDownType]="gcTagBoxConfig.dropDownType"
[tagTextMemberPath]="gcTagBoxConfig.tagTextMemberPath"
[dropDownTreeConfig]="gcTagBoxConfig.dropDownTreeConfig"
[allowDropDownResize]="gcTagBoxConfig.allowDropDownResize"
>
</gc-tag-box>
</div>
(function (global) {
System.config({
transpiler: 'ts',
typescriptOptions: {
tsconfig: true
},
meta: {
'typescript': {
"exports": "ts"
},
'*.css': { loader: 'css' }
},
paths: {
// paths serve as alias
'npm:': 'node_modules/'
},
// map tells the System loader where to look for things
map: {
'core-js': 'npm:core-js/client/shim.min.js',
'zone': 'npm:zone.js/fesm2015/zone.min.js',
//'reflect-metadata': 'npm:reflect-metadata/Reflect.js',
'rxjs': 'npm:rxjs/dist/bundles/rxjs.umd.min.js',
//'rxjs': 'npm:rxjs',
//'rxjs/operators': 'npm:rxjs/operators',
'@angular/core': 'npm:@angular/core/fesm2022',
'@angular/common': 'npm:@angular/common/fesm2022/common.mjs',
'@angular/compiler': 'npm:@angular/compiler/fesm2022/compiler.mjs',
'@angular/platform-browser': 'npm:@angular/platform-browser/fesm2022/platform-browser.mjs',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/fesm2022/platform-browser-dynamic.mjs',
'@angular/common/http': 'npm:@angular/common/fesm2022/http.mjs',
'@angular/router': 'npm:@angular/router/fesm2022/router.mjs',
'@angular/forms': 'npm:@angular/forms/fesm2022/forms.mjs',
'@mescius/inputman': 'npm:@mescius/inputman/index.js',
'@mescius/inputman.angular': 'npm:@mescius/inputman.angular/fesm2015/mescius-inputman.angular.mjs',
'@mescius/inputman.richtexteditor': 'npm:@mescius/inputman.richtexteditor/index.js',
'@mescius/inputman.richtexteditor.angular': 'npm:@mescius/inputman.richtexteditor.angular/fesm2015/mescius-inputman.richtexteditor.angular.mjs',
'@mescius/inputman.comment': 'npm:@mescius/inputman.comment/index.js',
'@mescius/inputman.comment.angular': 'npm:@mescius/inputman.comment.angular/fesm2015/mescius-inputman.comment.angular.mjs',
'@mescius/inputman/CSS': 'npm:@mescius/inputman/CSS',
"@mescius/inputman.richtexteditor/CSS": "npm:@mescius/inputman.richtexteditor/CSS",
'@mescius/inputman.richtexteditor/JS/plugins/advlist': 'npm:@mescius/inputman.richtexteditor/JS/plugins/advlist/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/all': 'npm:@mescius/inputman.richtexteditor/JS/plugins/all/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/autosave': 'npm:@mescius/inputman.richtexteditor/JS/plugins/autosave/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/charmap': 'npm:@mescius/inputman.richtexteditor/JS/plugins/charmap/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/directionality': 'npm:@mescius/inputman.richtexteditor/JS/plugins/directionality/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/emoticons': 'npm:@mescius/inputman.richtexteditor/JS/plugins/emoticons/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/fullscreen': 'npm:@mescius/inputman.richtexteditor/JS/plugins/fullscreen/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/htmlcode': 'npm:@mescius/inputman.richtexteditor/JS/plugins/htmlcode/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/image': 'npm:@mescius/inputman.richtexteditor/JS/plugins/image/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/link': 'npm:@mescius/inputman.richtexteditor/JS/plugins/link/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/lists': 'npm:@mescius/inputman.richtexteditor/JS/plugins/lists/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/media': 'npm:@mescius/inputman.richtexteditor/JS/plugins/media/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/pagebreak': 'npm:@mescius/inputman.richtexteditor/JS/plugins/pagebreak/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/preview': 'npm:@mescius/inputman.richtexteditor/JS/plugins/preview/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/save': 'npm:@mescius/inputman.richtexteditor/JS/plugins/save/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/searchreplace': 'npm:@mescius/inputman.richtexteditor/JS/plugins/searchreplace/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/table': 'npm:@mescius/inputman.richtexteditor/JS/plugins/table/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/template': 'npm:@mescius/inputman.richtexteditor/JS/plugins/template/plugin.js',
'@mescius/inputman.richtexteditor/JS/plugins/wordcount': 'npm:@mescius/inputman.richtexteditor/JS/plugins/wordcount/plugin.js',
'@mescius/inputman.comment/CSS': 'npm:@mescius/inputman.comment/CSS',
'@mescius/spread-sheets': 'npm:@mescius/spread-sheets/index.js',
'@mescius/spread-sheets-resources-ja': 'npm:@mescius/spread-sheets-resources-ja/index.js',
'@mescius/spread-sheets/styles': 'npm:@mescius/spread-sheets/styles',
'@mescius/wijmo': 'npm:@mescius/wijmo/index.js',
'@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles',
'@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures',
'@mescius/wijmo.nav': 'npm:@mescius/wijmo.nav/index.js',
'@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js',
'@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js',
'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css',
'jszip': 'npm:jszip/dist/jszip.min.js',
'typescript': 'npm:typescript/lib/typescript.js',
'ts': './plugin.js',
'tslib': 'npm:tslib/tslib.js',
'css': 'npm:systemjs-plugin-css/css.js'
},
// packages tells the System loader how to load when no filename and/or no extension
packages: {
src: {
defaultExtension: 'ts',
meta: {
"*.component.ts": {
loader: "system.component-loader.js"
}
}
},
rxjs: {
defaultExtension: 'js'
},
"node_modules": {
defaultExtension: 'js'
},
"@mescius/inputman": {
defaultExtension: 'js'
},
"@mescius/inputman.richtexteditor": {
defaultExtension: 'js'
},
"@mescius/inputman.comment": {
defaultExtension: 'js'
},
"node_modules/@angular": {
defaultExtension: 'mjs'
},
"@mescius/inputman.angular": {
defaultExtension: 'mjs'
},
"@mescius/inputman.comment.angular": {
defaultExtension: 'mjs'
},
'@angular/core': {
defaultExtension: 'mjs',
main: 'core.mjs'
},
"@mescius/inputman.richtexteditor.angular": {
defaultExtension: 'mjs'
},
}
});
})(this);
