Added the smartButtonTextProvider setting

Author: pkempenaers

src/app/component/angularjs-dropdown-multiselect.controller.js

@@ -230,6 +230,10 @@ export default function dropdownMultiselectController(
 
 	function getButtonText() {
 		if ($scope.settings.dynamicTitle && $scope.selectedModel && $scope.selectedModel.length > 0) {
+			if (angular.isFunction($scope.settings.smartButtonTextProvider)) {
+				return $scope.settings.smartButtonTextProvider($scope.selectedModel);
+			}
+
 			if ($scope.settings.smartButtonMaxItems > 0) {
 				const paddingWidth = 12 * 2;
 				const borderWidth = 1 * 2;

src/app/main/main.controller.js

@@ -324,5 +324,18 @@ export default class MainController {
 		$scope.idPropertySettings = {
 			idProperty: 'id',
 		};
+
+		$scope.smartButtonTextProviderModel = [
+		];
+		$scope.smartButtonTextProviderData = [
+			{ id: 1, label: 'David' },
+			{ id: 2, label: 'Jhon' },
+			{ id: 3, label: 'Danny' },
+		];
+		$scope.smartButtonTextProviderSettings = {
+			smartButtonTextProvider(selectionArray) {
+				return selectionArray.length + 2;
+			},
+		};
 	}
 }

src/app/main/main.template.html

@@ -1058,6 +1058,48 @@ <h3>Code</h3>
 ];
 $scope.idPropertySettings = {
 	idProperty: 'id',
+};
+					</div>
+				</div>
+			</div>
+		</div>
+		<div uib-accordion-group heading="Button text provider">
+			<div class="row">
+				<div class="col-xs-12">
+					When there is a selection this method will be called with the selection as a parameter. The function is supposed to return the text that you want to display on the button.
+				</div>
+			</div>
+			<div class="row">
+				<div class="col-xs-12 col-sm-6">
+					<h3>Demo</h3>
+					<div class="well">
+						<div ng-dropdown-multiselect="" options="smartButtonTextProviderData" selected-model="smartButtonTextProviderModel" extra-settings="smartButtonTextProviderSettings">
+						</div>
+					</div>
+				</div>
+				<div class="col-xs-12 col-sm-6">
+					<h3>The model:</h3>
+					<pre>{{smartButtonTextProviderModel|json}}</pre>
+				</div>
+			</div>
+			<div class="row">
+				<div class="col-md-12">
+					<h3>Code</h3>
+					<div hljs language="javascript">
+// HTML
+<div ng-dropdown-multiselect="" options="idPropertyData" selected-model="idPropertyModel" extra-settings="idPropertySettings">
+</div>
+
+$scope.smartButtonTextProviderModel = [];
+$scope.smartButtonTextProviderData = [
+	{ id: 1, label: 'David' },
+	{ id: 2, label: 'Jhon' },
+	{ id: 3, label: 'Danny' },
+];
+$scope.idPropertySettings = {
+	smartButtonTextProvider(selectionArray) {
+		return selectionArray.length + 2;
+	},
 };
 					</div>
 				</div>