Multiple Selection
Documentation
The DropDownBox widget is an editor that consists of a text field and drop-down content. The content can be anything. In this demo, it is the TreeView widget and the DataGrid widget. This demo also illustrates how to implement multiple selection and how to synchronize the DropDownBox with the nested widgets.
Feel free to share demo-related thoughts here.
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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($scope) {
var treeView;
var syncTreeViewSelection = function(treeView){
if (!treeView) return;
if (!$scope.treeBoxValue) {
treeView.unselectAll();
return;
}
$scope.treeBoxValue.forEach(function(key){
treeView.selectItem(key);
});
};
var makeAsyncDataSource = function(jsonFile){
return new DevExpress.data.CustomStore({
loadMode: "raw",
key: "ID",
load: function() {
return $.getJSON("../../../../data/" + jsonFile);
}
});
};
var getSelectedItemsKeys = function(items) {
var result = [];
items.forEach(function(item) {
if(item.selected) {
result.push(item.key);
}
if(item.items.length) {
result = result.concat(getSelectedItemsKeys(item.items));
}
});
return result;
};
var treeDataSource = makeAsyncDataSource("treeProducts.json"),
gridDataSource = makeAsyncDataSource("customers.json");
$scope.treeBoxValue = ["1_1"];
$scope.treeBoxOptions = {
bindingOptions: {
value: 'treeBoxValue'
},
valueExpr: "ID",
displayExpr: "name",
placeholder: "Select a value...",
showClearButton: true,
dataSource: treeDataSource,
onValueChanged: function(){
syncTreeViewSelection(treeView);
},
treeView: {
dataSource: treeDataSource,
dataStructure: "plain",
keyExpr: "ID",
parentIdExpr: "categoryId",
displayExpr: "name",
selectByClick: true,
selectNodesRecursive: false,
showCheckBoxesMode: "normal",
bindingOptions: {
selectionMode: "selectionMode"
},
onContentReady: function(e) {
treeView = e.component;
syncTreeViewSelection(treeView);
},
onItemSelectionChanged: function(args){
var nodes = args.component.getNodes();
$scope.treeBoxValue = getSelectedItemsKeys(nodes);
}
}
};
$scope.gridBoxValue = [3];
$scope.gridBoxOptions = {
bindingOptions: {
value: "gridBoxValue"
},
valueExpr: "ID",
placeholder: "Select a value...",
displayExpr: "CompanyName",
onValueChanged: function(e){
$scope.gridBoxValue = e.value || [];
},
showClearButton: true,
dataSource: gridDataSource,
dataGrid: {
dataSource: gridDataSource,
columns: ["CompanyName", "City", "Phone"],
hoverStateEnabled: true,
paging: { enabled: true, pageSize: 10 },
filterRow: { visible: true },
scrolling: { mode: "infinite" },
height: 345,
selection: { mode: "multiple" },
bindingOptions: {
"selectedRowKeys": "gridBoxValue"
},
onSelectionChanged: function(selectedItems){
$scope.gridBoxValue = selectedItems.selectedRowKeys;
}
}
};
});
<!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/3.4.1/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/19.1.6/css/dx.common.css"/>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.6/css/dx.light.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/19.1.6/js/dx.all.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css"/>
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container" ng-app="DemoApp" ng-controller="DemoController">
<div id="form">
<div class="dx-fieldset">
<div class="dx-field">
<div class="dx-field-label">DropDownBox with embedded TreeView</div>
<div class="dx-field-value">
<div dx-drop-down-box="treeBoxOptions">
<div data-options="dxTemplate: { name: 'content' }">
<div dx-tree-view="treeBoxOptions.treeView"></div>
</div>
</div>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">DropDownBox with embedded DataGrid</div>
<div class="dx-field-value">
<div dx-drop-down-box="gridBoxOptions">
<div data-options="dxTemplate: { name: 'content' }">
<div dx-data-grid="gridBoxOptions.dataGrid"></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
#form .dx-fieldset {
height: 500px;
}