Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you for the feedback!
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Backend API
import React, { useCallback, useState } from 'react';
import TreeList, { Column, Lookup, TreeListTypes } from 'devextreme-react/tree-list';
import { NumberBox, NumberBoxTypes } from 'devextreme-react/number-box';
import * as AspNetData from 'devextreme-aspnet-data-nojquery';
const url = 'https://js.devexpress.com/Demos/Mvc/api/TreeListTasks';
const dataSourceOptions = AspNetData.createStore({
key: 'Task_ID',
loadUrl: `${url}/Tasks`,
onBeforeSend(_, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
});
const taskEmployees = AspNetData.createStore({
key: 'ID',
loadMode: 'raw',
loadUrl: `${url}/TaskEmployees`,
});
const focusedRowKeyLabel = { 'aria-label': 'Focused Row Key' };
const App = () => {
const [taskSubject, setTaskSubject] = useState('');
const [taskAssigned, setTaskAssigned] = useState('');
const [startDate, setStartDate] = useState('');
const [taskStatus, setTaskStatus] = useState('');
const [taskProgress, setTaskProgress] = useState('');
const [focusedRowKey, setFocusedRowKey] = useState(45);
const onTaskIdChanged = useCallback((e: NumberBoxTypes.ValueChangedEvent) => {
if (e.event && e.value > 0) {
setFocusedRowKey(e.value);
}
}, []);
// eslint-disable-next-line @typescript-eslint/space-before-function-paren
const onFocusedRowChanged = useCallback(async(e: TreeListTypes.FocusedRowChangedEvent) => {
const rowData = e.row && e.row.data;
if (rowData) {
const progress = rowData.Task_Completion ? `${rowData.Task_Completion}%` : '';
const cellValue = e.component.cellValue(e.row.rowIndex, 'Assigned');
const item = await taskEmployees.byKey(cellValue);
setTaskSubject(rowData.Task_Subject);
setTaskAssigned(item.Name);
setStartDate(new Date(rowData.Task_Start_Date).toLocaleDateString());
setTaskStatus(e.row.data.Task_Status);
setTaskProgress(progress);
setFocusedRowKey(e.component.option('focusedRowKey'));
}
}, []);
return (
<div>
<TreeList
id="treeList"
dataSource={dataSourceOptions}
focusedRowEnabled={true}
focusedRowKey={focusedRowKey}
parentIdExpr="Task_Parent_ID"
hasItemsExpr="Has_Items"
wordWrapEnabled={true}
showBorders={true}
onFocusedRowChanged={onFocusedRowChanged}>
<Column dataField="Task_ID" width={100} alignment="left" />
<Column dataField="Task_Assigned_Employee_ID" caption="Assigned" minWidth={120}>
<Lookup dataSource={taskEmployees} valueExpr="ID" displayExpr="Name" />
</Column>
<Column dataField="Task_Status" caption="Status" width={160} />
<Column dataField="Task_Start_Date" caption="Start Date" dataType="date" width={160} />
<Column dataField="Task_Due_Date" caption="Due Date" dataType="date" width={160} />
</TreeList>
<div className="task-info">
<div className="info">
<div className="task-subject">{taskSubject}</div>
<span className="task-assigned">{taskAssigned}</span>
<span className="start-date">{startDate}</span>
</div>
<div className="progress">
<span className="task-status">{taskStatus}</span>
<span className="task-progress">{taskProgress}</span>
</div>
</div>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Focused row key </span>
<NumberBox
id="taskId"
min={1}
max={182}
step={0}
value={focusedRowKey}
inputAttr={focusedRowKeyLabel}
onValueChanged={onTaskIdChanged}>
</NumberBox>
</div>
</div>
</div>
);
};
export default App;
import React, { useCallback, useState } from 'react';
import TreeList, { Column, Lookup } from 'devextreme-react/tree-list';
import { NumberBox } from 'devextreme-react/number-box';
import * as AspNetData from 'devextreme-aspnet-data-nojquery';
const url = 'https://js.devexpress.com/Demos/Mvc/api/TreeListTasks';
const dataSourceOptions = AspNetData.createStore({
key: 'Task_ID',
loadUrl: `${url}/Tasks`,
onBeforeSend(_, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
});
const taskEmployees = AspNetData.createStore({
key: 'ID',
loadMode: 'raw',
loadUrl: `${url}/TaskEmployees`,
});
const focusedRowKeyLabel = { 'aria-label': 'Focused Row Key' };
const App = () => {
const [taskSubject, setTaskSubject] = useState('');
const [taskAssigned, setTaskAssigned] = useState('');
const [startDate, setStartDate] = useState('');
const [taskStatus, setTaskStatus] = useState('');
const [taskProgress, setTaskProgress] = useState('');
const [focusedRowKey, setFocusedRowKey] = useState(45);
const onTaskIdChanged = useCallback((e) => {
if (e.event && e.value > 0) {
setFocusedRowKey(e.value);
}
}, []);
// eslint-disable-next-line @typescript-eslint/space-before-function-paren
const onFocusedRowChanged = useCallback(async(e) => {
const rowData = e.row && e.row.data;
if (rowData) {
const progress = rowData.Task_Completion ? `${rowData.Task_Completion}%` : '';
const cellValue = e.component.cellValue(e.row.rowIndex, 'Assigned');
const item = await taskEmployees.byKey(cellValue);
setTaskSubject(rowData.Task_Subject);
setTaskAssigned(item.Name);
setStartDate(new Date(rowData.Task_Start_Date).toLocaleDateString());
setTaskStatus(e.row.data.Task_Status);
setTaskProgress(progress);
setFocusedRowKey(e.component.option('focusedRowKey'));
}
}, []);
return (
<div>
<TreeList
id="treeList"
dataSource={dataSourceOptions}
focusedRowEnabled={true}
focusedRowKey={focusedRowKey}
parentIdExpr="Task_Parent_ID"
hasItemsExpr="Has_Items"
wordWrapEnabled={true}
showBorders={true}
onFocusedRowChanged={onFocusedRowChanged}
>
<Column
dataField="Task_ID"
width={100}
alignment="left"
/>
<Column
dataField="Task_Assigned_Employee_ID"
caption="Assigned"
minWidth={120}
>
<Lookup
dataSource={taskEmployees}
valueExpr="ID"
displayExpr="Name"
/>
</Column>
<Column
dataField="Task_Status"
caption="Status"
width={160}
/>
<Column
dataField="Task_Start_Date"
caption="Start Date"
dataType="date"
width={160}
/>
<Column
dataField="Task_Due_Date"
caption="Due Date"
dataType="date"
width={160}
/>
</TreeList>
<div className="task-info">
<div className="info">
<div className="task-subject">{taskSubject}</div>
<span className="task-assigned">{taskAssigned}</span>
<span className="start-date">{startDate}</span>
</div>
<div className="progress">
<span className="task-status">{taskStatus}</span>
<span className="task-progress">{taskProgress}</span>
</div>
</div>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Focused row key </span>
<NumberBox
id="taskId"
min={1}
max={182}
step={0}
value={focusedRowKey}
inputAttr={focusedRowKeyLabel}
onValueChanged={onTaskIdChanged}
></NumberBox>
</div>
</div>
</div>
);
};
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
jsx: 'react',
},
meta: {
'react': {
'esModule': true,
},
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
'devextreme-aspnet-data-nojquery': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.8.1/prop-types.js',
'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@3.0.0/index.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@24.1.6/cjs',
'devextreme-react': 'npm:devextreme-react@24.1.6/cjs',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.11/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/localization/messages': {
format: 'json',
defaultExtension: 'json',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.13/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html>
<html lang="en">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.6/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import("./index.tsx");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
#treeList {
max-height: 400px;
}
.task-info {
font-family: "Segoe UI";
min-height: 100px;
display: flex;
flex-wrap: nowrap;
border: 2px solid rgba(0, 0, 0, 0.1);
padding: 16px;
box-sizing: border-box;
align-items: center;
justify-content: space-between;
}
.info {
display: flex;
flex-direction: column;
}
.task-subject {
line-height: 29px;
font-size: 18px;
font-weight: bold;
}
.progress {
display: flex;
flex-direction: column;
white-space: pre;
min-width: 105px;
}
.task-progress {
line-height: 42px;
font-size: 40px;
font-weight: bold;
}
.options {
margin-top: 20px;
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
position: relative;
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option {
margin-top: 10px;
}
.option > .dx-numberbox {
width: 200px;
display: inline-block;
vertical-align: middle;
}
.option > span {
margin-right: 10px;
}
In this demo, the row with the 45
key is focused initially. You can specify the focusedRowKey
property via the input field below the TreeList. The onFocusedRowChanged function is used to display additional information below the component when the focused row changes.