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Customization
Documentation
In this demo, a custom filter operation, "anyof", is implemented. The calculateFilterExpression function converts it into DataSource-compatible operations. The compatible and incompatible filter expressions are displayed under the FilterBuilder.
The set of available group operations is limited to "and" and "or" using the groupOperations array, and the groups’ maximum nesting level is limited to one using the maxGroupLevel.
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.
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var DemoApp = angular.module('DemoApp', ['dx']);
DemoApp.controller('DemoController', function DemoController($scope) {
$scope.filterValueText = null;
$scope.dataSourceValueText = null;
$scope.filterBuilderOptions = {
fields: fields,
value: filter,
maxGroupLevel: 1,
groupOperations: ["and", "or"],
onInitialized: updateTexts,
onValueChanged: updateTexts,
customOperations: [{
name: "anyof",
caption: "Is any of",
icon: "check",
editorTemplate: "tagBoxTemplate",
calculateFilterExpression: function(filterValue, field) {
return filterValue && filterValue.length
&& Array.prototype.concat.apply([], filterValue.map(function(value) {
return [[field.dataField, "=", value], "or"];
})).slice(0, -1);
}
}]
};
$scope.categories = categories;
$scope.onTagBoxValueChanged = function(e) {
e.model.data.setValue(e.value && e.value.length ? e.value : null);
};
function updateTexts(e) {
$scope.filterText = formatValue(e.component.option("value"));
$scope.dataSourceText = formatValue(e.component.getFilterExpression());
}
function formatValue(value, spaces) {
if(value && Array.isArray(value[0])) {
var TAB_SIZE = 4;
spaces = spaces || TAB_SIZE;
return "[" + getLineBreak(spaces) + value.map(function(item) {
return Array.isArray(item[0]) ? formatValue(item, spaces + TAB_SIZE) : JSON.stringify(item);
}).join("," + getLineBreak(spaces)) + getLineBreak(spaces - TAB_SIZE) + "]";
}
return JSON.stringify(value);
}
function getLineBreak(spaces) {
return "\r\n" + new Array(spaces + 1).join(" ");
}
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<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" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.light.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://ajax.googleapis.com/ajax/libs/angularjs/1.3.16/angular.min.js"></script>
<script>window.angular || document.write(decodeURIComponent('%3Cscript src="js/angular.min.js"%3E%3C/script%3E'))</script>
<script src="https://cdn3.devexpress.com/jslib/20.2.4/js/dx.all.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="data.js"></script>
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container" ng-app="DemoApp" ng-controller="DemoController">
<div dx-filter-builder="filterBuilderOptions" dx-item-alias="data">
<div data-options="dxTemplate: {name: 'tagBoxTemplate'}"
dx-tag-box="{
value: data.value,
items: categories,
onValueChanged: onTagBoxValueChanged,
width: 'auto'
}">
</div>
</div>
<div class="results">
<div>
<b>Value</b>
<pre>{{filterText}}</pre>
</div>
<div>
<b>DataSource's filter expression</b>
<pre>{{dataSourceText}}</pre>
</div>
</div>
</div>
</body>
</html>
.results {
margin-top: 50px;
display: flex;
justify-content: space-between;
}
.results > div {
flex-basis: 49%;
max-width: 50%;
background-color: rgba(191, 191, 191, 0.15);
position: relative;
}
.results b {
position: absolute;
top: -25px;
}
.results pre {
padding: 10px 20px;
height: 100%;
font-size: 13px;
overflow: auto;
box-sizing: border-box;
}
.dx-tagbox {
min-width: 150px;
}
.dx-filterbuilder .dx-numberbox {
width: 80px;
}
var filter = [
["Category", "anyof", ["Automation", "Monitors"]],
"or",
[
["Category", "=", "Televisions"],
"and",
["Price", "between", [2000, 4000]]
]
],
categories = [
"Video Players",
"Televisions",
"Monitors",
"Projectors",
"Automation"
],
fields = [{
dataField: "Name"
}, {
dataField: "Price",
dataType: "number",
format: "currency"
}, {
dataField: "Current_Inventory",
dataType: "number",
caption: "Inventory"
}, {
dataField: "Category",
filterOperations: ["=", "anyof"],
lookup: {
dataSource: categories
}
}
];