React Tree List - Focused Row

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/NetCore/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);

    }

  }, []);

  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,

    },

    'openai': {

      'esModule': true,

    },

  },

  paths: {

    'npm:': 'https://unpkg.com/',

    'bundles:': 'bundles/',

    'externals:': 'bundles/externals/',

  },

  defaultExtension: 'js',

  map: {

    'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',

    'typescript': 'npm:typescript@4.2.4/lib/typescript.js',

    'jszip': 'npm:jszip@3.10.1/dist/jszip.min.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/prop-types.js',

    'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@5.0.0/index.js',

    'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',

    'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',

    'es6-object-assign': 'npm:es6-object-assign',

    'devextreme': 'npm:devextreme@24.2.6/cjs',

    'devextreme-react': 'npm:devextreme-react@24.2.6/cjs',

    'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',

    'devexpress-diagram': 'npm:devexpress-diagram@2.2.15/dist/dx-diagram.js',

    'devexpress-gantt': 'npm:devexpress-gantt@4.1.60/dist/dx-gantt.js',

    '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12',

    '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/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/common/core/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@3.0.12/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>↔</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;

}

​