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, { useState } from 'react';
import Gantt, {
Tasks, Dependencies, Column, Validation, Editing,
} from 'devextreme-react/gantt';
import CheckBox, { ICheckBoxOptions } from 'devextreme-react/check-box';
import { tasks, dependencies } from './data.ts';
function App() {
const [ganttConfig, setGanttConfig] = useState({
autoUpdateParentTasks: true,
validateDependencies: true,
enablePredecessorGap: true,
});
const onEnablePredecessorGapChanged: ICheckBoxOptions['onValueChanged'] = ({ value }) => {
setGanttConfig({
...ganttConfig,
enablePredecessorGap: value,
});
};
const onAutoUpdateParentTasksChanged: ICheckBoxOptions['onValueChanged'] = ({ value }) => {
setGanttConfig({
...ganttConfig,
autoUpdateParentTasks: value,
});
};
const onValidateDependenciesChanged: ICheckBoxOptions['onValueChanged'] = ({ value }) => {
setGanttConfig({
...ganttConfig,
validateDependencies: value,
});
};
return (
<div id="form-demo">
<div className="options">
<div className="caption">Options</div>
<div className="option">
<CheckBox
text="Auto Update Parent Tasks"
value={ganttConfig.autoUpdateParentTasks}
onValueChanged={onAutoUpdateParentTasksChanged}
/>
</div>
{' '}
<div className="option">
<CheckBox
text="Enable Dependency Validation"
value={ganttConfig.validateDependencies}
onValueChanged={onValidateDependenciesChanged}
/>
</div>
{' '}
<div className="option">
<CheckBox
text="Enable Predecessor Gap"
value={ganttConfig.enablePredecessorGap}
onValueChanged={onEnablePredecessorGapChanged}
/>
</div>
</div>
<div className="widget-container">
<Gantt
taskListWidth={500}
height={700}
taskTitlePosition="none">
<Validation
autoUpdateParentTasks={ganttConfig.autoUpdateParentTasks}
validateDependencies={ganttConfig.validateDependencies}
enablePredecessorGap={ganttConfig.enablePredecessorGap} />
<Tasks dataSource={tasks} />
<Dependencies dataSource={dependencies} />
<Column dataField="title" caption="Task" width={300} />
<Column dataField="start" caption="Start Date" />
<Column dataField="end" caption="End Date" />
<Editing enabled />
</Gantt>
</div>
</div>
);
}
export default App;
import React, { useState } from 'react';
import Gantt, {
Tasks, Dependencies, Column, Validation, Editing,
} from 'devextreme-react/gantt';
import CheckBox from 'devextreme-react/check-box';
import { tasks, dependencies } from './data.js';
function App() {
const [ganttConfig, setGanttConfig] = useState({
autoUpdateParentTasks: true,
validateDependencies: true,
enablePredecessorGap: true,
});
const onEnablePredecessorGapChanged = ({ value }) => {
setGanttConfig({
...ganttConfig,
enablePredecessorGap: value,
});
};
const onAutoUpdateParentTasksChanged = ({ value }) => {
setGanttConfig({
...ganttConfig,
autoUpdateParentTasks: value,
});
};
const onValidateDependenciesChanged = ({ value }) => {
setGanttConfig({
...ganttConfig,
validateDependencies: value,
});
};
return (
<div id="form-demo">
<div className="options">
<div className="caption">Options</div>
<div className="option">
<CheckBox
text="Auto Update Parent Tasks"
value={ganttConfig.autoUpdateParentTasks}
onValueChanged={onAutoUpdateParentTasksChanged}
/>
</div>{' '}
<div className="option">
<CheckBox
text="Enable Dependency Validation"
value={ganttConfig.validateDependencies}
onValueChanged={onValidateDependenciesChanged}
/>
</div>{' '}
<div className="option">
<CheckBox
text="Enable Predecessor Gap"
value={ganttConfig.enablePredecessorGap}
onValueChanged={onEnablePredecessorGapChanged}
/>
</div>
</div>
<div className="widget-container">
<Gantt
taskListWidth={500}
height={700}
taskTitlePosition="none"
>
<Validation
autoUpdateParentTasks={ganttConfig.autoUpdateParentTasks}
validateDependencies={ganttConfig.validateDependencies}
enablePredecessorGap={ganttConfig.enablePredecessorGap}
/>
<Tasks dataSource={tasks} />
<Dependencies dataSource={dependencies} />
<Column
dataField="title"
caption="Task"
width={300}
/>
<Column
dataField="start"
caption="Start Date"
/>
<Column
dataField="end"
caption="End Date"
/>
<Editing enabled />
</Gantt>
</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'),
);
export const currentDate = new Date(Date.now());
const month = currentDate.getMonth();
const year = currentDate.getFullYear();
export const tasks = [{
id: 1,
parentId: 0,
title: 'Johnson Residence Construction Project',
start: new Date(year, month - 1, 1),
end: new Date(year, month - 1, 1),
progress: 0,
}, {
id: 2,
parentId: 1,
title: 'Planning and Pre-Construction Phase',
start: new Date(year, month - 1, 1),
end: new Date(year, month - 1, 1),
progress: 0,
}, {
id: 3,
parentId: 2,
title: 'Architectural Design and Site Planning',
start: new Date(year, month - 1, 1),
end: new Date(year, month - 1, 15),
progress: 0,
}, {
id: 4,
parentId: 2,
title: 'Engineering and Final Blueprint',
start: new Date(year, month - 1, 8),
end: new Date(year, month - 1, 15),
progress: 0,
}, {
id: 5,
parentId: 2,
title: 'City Permits and Contracts',
start: new Date(year, month - 1, 15),
end: new Date(year, month - 1, 18),
progress: 0,
}, {
id: 6,
parentId: 1,
title: 'Construction Phase',
start: new Date(year, month - 1, 18),
end: new Date(year, month - 1, 18),
progress: 0,
}, {
id: 7,
parentId: 6,
title: 'Grading and Excavation',
start: new Date(year, month - 1, 18),
end: new Date(year, month - 1, 22),
progress: 0,
}, {
id: 8,
parentId: 6,
title: 'Demolition and Removal',
start: new Date(year, month - 1, 19),
end: new Date(year, month - 1, 23),
progress: 0,
}, {
id: 9,
parentId: 6,
title: 'Foundation and Concrete ',
start: new Date(year, month - 1, 22),
end: new Date(year, month - 1, 28),
progress: 0,
}, {
id: 10,
parentId: 6,
title: 'Rough Framing and Carpentery',
start: new Date(year, month - 1, 25),
end: new Date(year, month, 5),
progress: 0,
}, {
id: 11,
parentId: 6,
title: 'Inspection (Structure)',
start: new Date(year, month, 5),
end: new Date(year, month, 5),
progress: 0,
}, {
id: 12,
parentId: 6,
title: 'Electrical Rough-in',
start: new Date(year, month, 6),
end: new Date(year, month, 19),
progress: 0,
}, {
id: 13,
parentId: 6,
title: 'Plumbing Rough-in',
start: new Date(year, month, 19),
end: new Date(year, month, 19),
progress: 0,
}, {
id: 14,
parentId: 6,
title: 'Heating and A/C',
start: new Date(year, month, 19),
end: new Date(year, month, 26),
progress: 0,
}, {
id: 15,
parentId: 6,
title: 'Drywall',
start: new Date(year, month, 25),
end: new Date(year, month + 1, 10),
progress: 0,
}, {
id: 16,
parentId: 6,
title: 'Painting (Exterior)',
start: new Date(year, month + 1, 7),
end: new Date(year, month + 1, 21),
progress: 0,
}, {
id: 17,
parentId: 6,
title: 'Interior Carpentery (Interior)',
start: new Date(year, month + 1, 17),
end: new Date(year, month + 1, 28),
progress: 0,
}, {
id: 18,
parentId: 6,
title: 'Flooring and Interior Paint',
start: new Date(year, month + 1, 26),
end: new Date(year, month + 2, 9),
progress: 0,
}, {
id: 19,
parentId: 1,
title: 'Final Phase',
start: new Date(year, month + 2, 9),
end: new Date(year, month + 2, 9),
progress: 0,
}, {
id: 20,
parentId: 19,
title: 'Review-Punch List',
start: new Date(year, month + 2, 9),
end: new Date(year, month + 2, 23),
progress: 0,
}, {
id: 21,
parentId: 19,
title: 'Final Inspection',
start: new Date(year, month + 2, 24),
end: new Date(year, month + 2, 24),
progress: 0,
}, {
id: 22,
parentId: 19,
title: 'Final Paperwork and Documents',
start: new Date(year, month + 2, 24),
end: new Date(year, month + 2, 28),
progress: 0,
}];
export const dependencies = [{
id: 1,
predecessorId: 4,
successorId: 5,
type: 0,
}, {
id: 2,
predecessorId: 5,
successorId: 7,
type: 0,
}, {
id: 3,
predecessorId: 12,
successorId: 13,
type: 0,
}, {
id: 4,
predecessorId: 13,
successorId: 14,
type: 0,
}, {
id: 5,
predecessorId: 18,
successorId: 20,
type: 0,
}, {
id: 6,
predecessorId: 21,
successorId: 22,
type: 0,
}];
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,
},
},
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',
'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@24.1.7/cjs',
'devextreme-react': 'npm:devextreme-react@24.1.7/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@2.2.13/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'));
export const currentDate = new Date(Date.now());
const month = currentDate.getMonth();
const year = currentDate.getFullYear();
export const tasks = [
{
id: 1,
parentId: 0,
title: 'Johnson Residence Construction Project',
start: new Date(year, month - 1, 1),
end: new Date(year, month - 1, 1),
progress: 0,
},
{
id: 2,
parentId: 1,
title: 'Planning and Pre-Construction Phase',
start: new Date(year, month - 1, 1),
end: new Date(year, month - 1, 1),
progress: 0,
},
{
id: 3,
parentId: 2,
title: 'Architectural Design and Site Planning',
start: new Date(year, month - 1, 1),
end: new Date(year, month - 1, 15),
progress: 0,
},
{
id: 4,
parentId: 2,
title: 'Engineering and Final Blueprint',
start: new Date(year, month - 1, 8),
end: new Date(year, month - 1, 15),
progress: 0,
},
{
id: 5,
parentId: 2,
title: 'City Permits and Contracts',
start: new Date(year, month - 1, 15),
end: new Date(year, month - 1, 18),
progress: 0,
},
{
id: 6,
parentId: 1,
title: 'Construction Phase',
start: new Date(year, month - 1, 18),
end: new Date(year, month - 1, 18),
progress: 0,
},
{
id: 7,
parentId: 6,
title: 'Grading and Excavation',
start: new Date(year, month - 1, 18),
end: new Date(year, month - 1, 22),
progress: 0,
},
{
id: 8,
parentId: 6,
title: 'Demolition and Removal',
start: new Date(year, month - 1, 19),
end: new Date(year, month - 1, 23),
progress: 0,
},
{
id: 9,
parentId: 6,
title: 'Foundation and Concrete ',
start: new Date(year, month - 1, 22),
end: new Date(year, month - 1, 28),
progress: 0,
},
{
id: 10,
parentId: 6,
title: 'Rough Framing and Carpentery',
start: new Date(year, month - 1, 25),
end: new Date(year, month, 5),
progress: 0,
},
{
id: 11,
parentId: 6,
title: 'Inspection (Structure)',
start: new Date(year, month, 5),
end: new Date(year, month, 5),
progress: 0,
},
{
id: 12,
parentId: 6,
title: 'Electrical Rough-in',
start: new Date(year, month, 6),
end: new Date(year, month, 19),
progress: 0,
},
{
id: 13,
parentId: 6,
title: 'Plumbing Rough-in',
start: new Date(year, month, 19),
end: new Date(year, month, 19),
progress: 0,
},
{
id: 14,
parentId: 6,
title: 'Heating and A/C',
start: new Date(year, month, 19),
end: new Date(year, month, 26),
progress: 0,
},
{
id: 15,
parentId: 6,
title: 'Drywall',
start: new Date(year, month, 25),
end: new Date(year, month + 1, 10),
progress: 0,
},
{
id: 16,
parentId: 6,
title: 'Painting (Exterior)',
start: new Date(year, month + 1, 7),
end: new Date(year, month + 1, 21),
progress: 0,
},
{
id: 17,
parentId: 6,
title: 'Interior Carpentery (Interior)',
start: new Date(year, month + 1, 17),
end: new Date(year, month + 1, 28),
progress: 0,
},
{
id: 18,
parentId: 6,
title: 'Flooring and Interior Paint',
start: new Date(year, month + 1, 26),
end: new Date(year, month + 2, 9),
progress: 0,
},
{
id: 19,
parentId: 1,
title: 'Final Phase',
start: new Date(year, month + 2, 9),
end: new Date(year, month + 2, 9),
progress: 0,
},
{
id: 20,
parentId: 19,
title: 'Review-Punch List',
start: new Date(year, month + 2, 9),
end: new Date(year, month + 2, 23),
progress: 0,
},
{
id: 21,
parentId: 19,
title: 'Final Inspection',
start: new Date(year, month + 2, 24),
end: new Date(year, month + 2, 24),
progress: 0,
},
{
id: 22,
parentId: 19,
title: 'Final Paperwork and Documents',
start: new Date(year, month + 2, 24),
end: new Date(year, month + 2, 28),
progress: 0,
},
];
export const dependencies = [
{
id: 1,
predecessorId: 4,
successorId: 5,
type: 0,
},
{
id: 2,
predecessorId: 5,
successorId: 7,
type: 0,
},
{
id: 3,
predecessorId: 12,
successorId: 13,
type: 0,
},
{
id: 4,
predecessorId: 13,
successorId: 14,
type: 0,
},
{
id: 5,
predecessorId: 18,
successorId: 20,
type: 0,
},
{
id: 6,
predecessorId: 21,
successorId: 22,
type: 0,
},
];
<!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/24.1.7/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.7/css/dx-gantt.min.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>
#gantt {
height: 700px;
}
.options {
margin-bottom: 20px;
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
position: relative;
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option {
margin-top: 10px;
margin-right: 40px;
display: inline-block;
}
.option:last-child {
margin-right: 0;
}
The Gantt supports the following dependency validation rules:
- Finish to Start (FS) - A successor task's start point should be equal or later than the preceding task's end point.
- Start to Start (SS) - A successor task's start point should be equal or later than the preceding task's start point.
- Finish to Finish (FF) - A successor task's end point should be equal or later than the preceding task's end point.
- Start to Finish (SF) - A successor task's end point should be equal or later than a preceding task's start point.
The Gantt also has the autoUpdateParentTasks property that enables validation for parent-child relationship:
- A parent task's duration equals a summary duration of its child tasks.
- A parent task and its first child starts at the same time.
- A parent task and its last child ends at the same time.
- A parent task's progress is a summary progress of its child tasks.
The Gantt processes changes in task values before they are saved to a database. The component displays a popup window with a list of available actions if an error can be handled in several ways.