Backend API
import React, { useCallback } from 'react';
import Diagram, {
CustomShape, Nodes, AutoLayout, ContextToolbox, Toolbox, PropertiesPanel, Group, type DiagramTypes,
} from 'devextreme-react/diagram';
import notify from 'devextreme/ui/notify';
import { ArrayStore } from 'devextreme-react/common/data';
import service from './data.ts';
const shapes = ['team', 'employee'];
const orgItemsDataSource = new ArrayStore({
key: 'ID',
data: service.getOrgItems(),
});
function showToast(text: string) {
notify({
position: {
at: 'top', my: 'top', of: '#diagram', offset: '0 4',
},
message: text,
type: 'warning',
delayTime: 2000,
});
}
function onRequestLayoutUpdate(e: DiagramTypes.RequestLayoutUpdateEvent) {
for (let i = 0; i < e.changes.length; i += 1) {
if (e.changes[i].type === 'remove') {
e.allowed = true;
} else if (e.changes[i].data.ParentID !== undefined && e.changes[i].data.ParentID !== null) {
e.allowed = true;
}
}
}
function itemStyleExpr(obj: { Type: string; }) {
if (obj.Type === 'root') {
return { fill: '#ffcfc3' };
}
if (obj.Type === 'team') {
return { fill: '#b7e3fe' };
}
return { fill: '#bbefcb' };
}
export default function App() {
const onRequestEditOperation = useCallback((e) => {
const diagram = e.component.instance();
if (e.operation === 'addShape') {
if (e.args.shape.type !== 'employee' && e.args.shape.type !== 'team') {
if (e.reason !== 'checkUIElementAvailability') {
showToast('You can add only a \'Team\' or \'Employee\' shape.');
}
e.allowed = false;
}
} else if (e.operation === 'deleteShape') {
if (e.args.shape.type === 'root') {
if (e.reason !== 'checkUIElementAvailability') {
showToast('You cannot delete the \'Development\' shape.');
}
e.allowed = false;
}
if (e.args.shape.type === 'team') {
for (let i = 0; i < e.args.shape.attachedConnectorIds.length; i += 1) {
if (diagram.getItemById(e.args.shape.attachedConnectorIds[i]).toId !== e.args.shape.id) {
if (e.reason !== 'checkUIElementAvailability') {
showToast('You cannot delete a \'Team\' shape that has a child shape.');
}
e.allowed = false;
break;
}
}
}
} else if (e.operation === 'resizeShape') {
if (e.args.newSize.width < 1 || e.args.newSize.height < 0.75) {
if (e.reason !== 'checkUIElementAvailability') {
showToast('The shape size is too small.');
}
e.allowed = false;
}
} else if (e.operation === 'changeConnection') {
const shapeType = e.args.newShape?.type;
if (shapeType === 'root' && e.args.connectorPosition === 'end') {
if (e.reason !== 'checkUIElementAvailability') {
showToast('The \'Development\' shape cannot have an incoming connection.');
}
e.allowed = false;
}
if (shapeType === 'employee' && e.args.connectorPosition === 'start') {
e.allowed = false;
}
} else if (e.operation === 'changeConnectorPoints') {
if (e.args.newPoints.length > 2) {
if (e.reason !== 'checkUIElementAvailability') {
showToast('You cannot add points to a connector.');
}
e.allowed = false;
}
} else if (e.operation === 'beforeChangeShapeText') {
if (e.args.shape.type === 'root') {
if (e.reason !== 'checkUIElementAvailability') {
showToast('You cannot change the \'Development\' shape\'s text.');
}
e.allowed = false;
}
} else if (e.operation === 'changeShapeText') {
if (e.args.text === '') {
if (e.reason !== 'checkUIElementAvailability') {
showToast('A shape text cannot be empty.');
}
e.allowed = false;
}
} else if (e.operation === 'beforeChangeConnectorText') {
e.allowed = false;
}
}, []);
return (
<Diagram
id="diagram"
onRequestEditOperation={onRequestEditOperation}
onRequestLayoutUpdate={onRequestLayoutUpdate}
>
<CustomShape
category="items"
type="root"
baseType="octagon"
defaultText="Development"
/>
<CustomShape
category="items"
type="team"
baseType="ellipse"
title="Team"
defaultText="Team Name"
/>
<CustomShape
category="items"
type="employee"
baseType="rectangle"
title="Employee"
defaultText="Employee Name"
/>
<Nodes
dataSource={orgItemsDataSource}
keyExpr="ID"
textExpr="Name"
typeExpr="Type"
parentKeyExpr="ParentID"
styleExpr={itemStyleExpr}
>
<AutoLayout type="tree" />
</Nodes>
<ContextToolbox shapeIconsPerRow={2} width={100} shapes={shapes}>
</ContextToolbox>
<Toolbox shapeIconsPerRow={2}>
<Group title="Items" shapes={shapes} />
</Toolbox>
<PropertiesPanel visibility="disabled">
</PropertiesPanel>
</Diagram>
);
}
import React, { useCallback } from 'react';
import Diagram, {
CustomShape,
Nodes,
AutoLayout,
ContextToolbox,
Toolbox,
PropertiesPanel,
Group,
} from 'devextreme-react/diagram';
import notify from 'devextreme/ui/notify';
import { ArrayStore } from 'devextreme-react/common/data';
import service from './data.js';
const shapes = ['team', 'employee'];
const orgItemsDataSource = new ArrayStore({
key: 'ID',
data: service.getOrgItems(),
});
function showToast(text) {
notify({
position: {
at: 'top',
my: 'top',
of: '#diagram',
offset: '0 4',
},
message: text,
type: 'warning',
delayTime: 2000,
});
}
function onRequestLayoutUpdate(e) {
for (let i = 0; i < e.changes.length; i += 1) {
if (e.changes[i].type === 'remove') {
e.allowed = true;
} else if (e.changes[i].data.ParentID !== undefined && e.changes[i].data.ParentID !== null) {
e.allowed = true;
}
}
}
function itemStyleExpr(obj) {
if (obj.Type === 'root') {
return { fill: '#ffcfc3' };
}
if (obj.Type === 'team') {
return { fill: '#b7e3fe' };
}
return { fill: '#bbefcb' };
}
export default function App() {
const onRequestEditOperation = useCallback((e) => {
const diagram = e.component.instance();
if (e.operation === 'addShape') {
if (e.args.shape.type !== 'employee' && e.args.shape.type !== 'team') {
if (e.reason !== 'checkUIElementAvailability') {
showToast("You can add only a 'Team' or 'Employee' shape.");
}
e.allowed = false;
}
} else if (e.operation === 'deleteShape') {
if (e.args.shape.type === 'root') {
if (e.reason !== 'checkUIElementAvailability') {
showToast("You cannot delete the 'Development' shape.");
}
e.allowed = false;
}
if (e.args.shape.type === 'team') {
for (let i = 0; i < e.args.shape.attachedConnectorIds.length; i += 1) {
if (diagram.getItemById(e.args.shape.attachedConnectorIds[i]).toId !== e.args.shape.id) {
if (e.reason !== 'checkUIElementAvailability') {
showToast("You cannot delete a 'Team' shape that has a child shape.");
}
e.allowed = false;
break;
}
}
}
} else if (e.operation === 'resizeShape') {
if (e.args.newSize.width < 1 || e.args.newSize.height < 0.75) {
if (e.reason !== 'checkUIElementAvailability') {
showToast('The shape size is too small.');
}
e.allowed = false;
}
} else if (e.operation === 'changeConnection') {
const shapeType = e.args.newShape?.type;
if (shapeType === 'root' && e.args.connectorPosition === 'end') {
if (e.reason !== 'checkUIElementAvailability') {
showToast("The 'Development' shape cannot have an incoming connection.");
}
e.allowed = false;
}
if (shapeType === 'employee' && e.args.connectorPosition === 'start') {
e.allowed = false;
}
} else if (e.operation === 'changeConnectorPoints') {
if (e.args.newPoints.length > 2) {
if (e.reason !== 'checkUIElementAvailability') {
showToast('You cannot add points to a connector.');
}
e.allowed = false;
}
} else if (e.operation === 'beforeChangeShapeText') {
if (e.args.shape.type === 'root') {
if (e.reason !== 'checkUIElementAvailability') {
showToast("You cannot change the 'Development' shape's text.");
}
e.allowed = false;
}
} else if (e.operation === 'changeShapeText') {
if (e.args.text === '') {
if (e.reason !== 'checkUIElementAvailability') {
showToast('A shape text cannot be empty.');
}
e.allowed = false;
}
} else if (e.operation === 'beforeChangeConnectorText') {
e.allowed = false;
}
}, []);
return (
<Diagram
id="diagram"
onRequestEditOperation={onRequestEditOperation}
onRequestLayoutUpdate={onRequestLayoutUpdate}
>
<CustomShape
category="items"
type="root"
baseType="octagon"
defaultText="Development"
/>
<CustomShape
category="items"
type="team"
baseType="ellipse"
title="Team"
defaultText="Team Name"
/>
<CustomShape
category="items"
type="employee"
baseType="rectangle"
title="Employee"
defaultText="Employee Name"
/>
<Nodes
dataSource={orgItemsDataSource}
keyExpr="ID"
textExpr="Name"
typeExpr="Type"
parentKeyExpr="ParentID"
styleExpr={itemStyleExpr}
>
<AutoLayout type="tree" />
</Nodes>
<ContextToolbox
shapeIconsPerRow={2}
width={100}
shapes={shapes}
></ContextToolbox>
<Toolbox shapeIconsPerRow={2}>
<Group
title="Items"
shapes={shapes}
/>
</Toolbox>
<PropertiesPanel visibility="disabled"></PropertiesPanel>
</Diagram>
);
}
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
const orgItems = [{
ID: '106',
Name: 'Development',
Type: 'root',
}, {
ID: '107',
Name: 'WinForms Team',
Type: 'team',
ParentID: '106',
}, {
ID: '109',
Name: 'Javascript Team',
Type: 'team',
ParentID: '106',
}, {
ID: '110',
Name: 'ASP.NET Team',
Type: 'team',
ParentID: '106',
}, {
ID: '112',
Name: 'Ana Trujillo',
Type: 'employee',
ParentID: '107',
}, {
ID: '113',
Name: 'Antonio Moreno',
Type: 'employee',
ParentID: '107',
}, {
ID: '115',
Name: 'Christina Berglund',
Type: 'employee',
ParentID: '109',
}, {
ID: '116',
Name: 'Hanna Moos',
Type: 'employee',
ParentID: '109',
}, {
ID: '119',
Name: 'Laurence Lebihan',
Type: 'employee',
ParentID: '110',
}, {
ID: '122',
Name: 'Patricio Simpson',
Type: 'employee',
ParentID: '110',
}, {
ID: '123',
Name: 'Francisco Chang',
Type: 'employee',
ParentID: '110',
}];
export default {
getOrgItems() {
return orgItems;
},
};
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
const orgItems = [
{
ID: '106',
Name: 'Development',
Type: 'root',
},
{
ID: '107',
Name: 'WinForms Team',
Type: 'team',
ParentID: '106',
},
{
ID: '109',
Name: 'Javascript Team',
Type: 'team',
ParentID: '106',
},
{
ID: '110',
Name: 'ASP.NET Team',
Type: 'team',
ParentID: '106',
},
{
ID: '112',
Name: 'Ana Trujillo',
Type: 'employee',
ParentID: '107',
},
{
ID: '113',
Name: 'Antonio Moreno',
Type: 'employee',
ParentID: '107',
},
{
ID: '115',
Name: 'Christina Berglund',
Type: 'employee',
ParentID: '109',
},
{
ID: '116',
Name: 'Hanna Moos',
Type: 'employee',
ParentID: '109',
},
{
ID: '119',
Name: 'Laurence Lebihan',
Type: 'employee',
ParentID: '110',
},
{
ID: '122',
Name: 'Patricio Simpson',
Type: 'employee',
ParentID: '110',
},
{
ID: '123',
Name: 'Francisco Chang',
Type: 'employee',
ParentID: '110',
},
];
export default {
getOrgItems() {
return orgItems;
},
};
<!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/26.1.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx-diagram.min.css" />
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" />
<link rel="stylesheet" type="text/css" href="./bundle.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
<script src="bundles/vendor/react.vendor.js"></script>
<script src="./bundle.js"></script>
</body>
</html>
#diagram {
height: 600px;
}