Advanced Data Binding
Documentation
The Diagram widget accepts functions as expression property values. The widget allows you to implement custom logic when you bind a diagram to a data source. In this demo, the nodes and edges collections are bound to a data source. Custom functions are used to get different shape types and font styles for items based on additional data source information.
The autoLayout option specifies an auto-layout algorithm type and orientation that the widget uses to build diagrams.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you!
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We appreciate your feedback.
<template>
<DxDiagram
id="diagram"
ref="diagram"
>
<DxNodes
:data-source="orgItemsDataSource"
:type-expr="itemTypeExpr"
:text-expr="'name'"
:width-expr="itemWidthExpr"
:height-expr="itemHeightExpr"
:text-style-expr="itemTextStyleExpr"
:style-expr="itemStyleExpr"
>
<DxAutoLayout
:type="'tree'"
:orientation="'horizontal'"
/>
</DxNodes>
<DxEdges
:data-source="orgLinksDataSource"
:from-line-end-expr="linkFromLineEndExpr"
:to-line-end-expr="linkToLineEndExpr"
:style-expr="linkStyleExpr"
/>
<DxToolbox>
<DxGroup
:category="'general'"
:title="'General'"
/>
</DxToolbox>
</DxDiagram>
</template>
<script>
import { DxDiagram, DxNodes, DxAutoLayout, DxEdges, DxToolbox, DxGroup } from 'devextreme-vue/diagram';
import ArrayStore from 'devextreme/data/array_store';
import service from './data.js';
export default {
components: {
DxDiagram, DxNodes, DxAutoLayout, DxEdges, DxToolbox, DxGroup
},
data() {
return {
orgItemsDataSource: new ArrayStore({
key: 'this',
data: service.getOrgItems()
}),
orgLinksDataSource: new ArrayStore({
key: 'this',
data: service.getOrgLinks()
})
};
},
methods: {
itemTypeExpr(obj, value) {
if(value) {
obj.type = (value === 'rectangle') ? undefined : 'group';
} else {
return obj.type === 'group' ? 'ellipse' : 'rectangle';
}
},
itemWidthExpr(obj, value) {
if(value) {
obj.width = value;
} else {
return obj.width || (obj.type === 'group' && 1.5) || 1;
}
},
itemHeightExpr(obj, value) {
if(value) {
obj.height = value;
} else {
return obj.height || (obj.type === 'group' && 1) || 0.75;
}
},
itemTextStyleExpr(obj) {
if(obj.level === 'senior') {
return { 'font-weight': 'bold', 'text-decoration': 'underline' };
}
return {};
},
itemStyleExpr(obj) {
let style = { 'stroke': '#444444' };
if(obj.type === 'group') {
style['fill'] = '#f3f3f3';
}
return style;
},
linkStyleExpr() {
return { 'stroke': '#444444' };
},
linkFromLineEndExpr() {
return 'none';
},
linkToLineEndExpr() {
return 'none';
}
}
};
</script>
<style scoped>
#diagram {
height: 900px;
}
</style>
import Vue from 'vue';
import App from './App.vue';
new Vue({
el: '#app',
components: { App },
template: '<App/>'
});
<!DOCTYPE html>
<html>
<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=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.4/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.4/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" />
<script src="https://unpkg.com/core-js@2.4.1/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.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app">
</div>
</div>
</body>
</html>
var orgItems = [
{
'id': '106',
'name': 'Development',
'type': 'group'
},
{
'id': '107',
'name': 'WinForms\nTeam',
'type': 'group'
},
{
'id': '108',
'name': 'WPF\nTeam',
'type': 'group'
},
{
'id': '109',
'name': 'Javascript\nTeam',
'type': 'group'
},
{
'id': '110',
'name': 'ASP.NET\nTeam',
'type': 'group'
},
{
'id': '112',
'name': 'Ana\nTrujillo',
'level': 'senior'
},
{
'id': '113',
'name': 'Antonio\nMoreno'
},
{
'id': '115',
'name': 'Christina\nBerglund'
},
{
'id': '116',
'name': 'Hanna\nMoos'
},
{
'id': '119',
'name': 'Laurence\nLebihan'
},
{
'id': '120',
'name': 'Elizabeth\nLincoln',
'level': 'senior'
},
{
'id': '122',
'name': 'Patricio\nSimpson',
'level': 'senior'
},
{
'id': '123',
'name': 'Francisco\nChang'
}
];
var orgLinks = [
{
'id': '124',
'from': '106',
'to': '108',
},
{
'id': '125',
'from': '106',
'to': '109',
},
{
'id': '126',
'from': '106',
'to': '107',
},
{
'id': '127',
'from': '106',
'to': '110',
},
{
'id': '129',
'from': '110',
'to': '112',
},
{
'id': '130',
'from': '110',
'to': '113',
},
{
'id': '132',
'from': '107',
'to': '115',
},
{
'id': '133',
'from': '107',
'to': '116',
},
{
'id': '136',
'from': '108',
'to': '119',
},
{
'id': '137',
'from': '108',
'to': '120',
},
{
'id': '139',
'from': '109',
'to': '122',
},
{
'id': '140',
'from': '109',
'to': '123',
}
];
export default {
getOrgItems() {
return orgItems;
},
getOrgLinks() {
return orgLinks;
}
};
System.config({
transpiler: 'plugin-babel',
meta: {
'*.vue': {
loader: 'vue-loader'
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'vue': 'npm:vue@2.6.3/dist/vue.esm.browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@latest/index.js',
'devextreme': 'npm:devextreme@20.1',
'devextreme-vue': 'npm:devextreme-vue@20.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram@1.0.5',
'devexpress-gantt': 'npm:devexpress-gantt@1.0.3',
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
packages: {
'devextreme-vue': {
main: 'index.js'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
},
babelOptions: {
sourceMaps: false,
stage0: true
}
});