Changed boolean to event, to execute in Mendix

dist/tmp/widgets/Backhandler.xml

@@ -7,14 +7,11 @@
     <description>Disregard back events on page</description>
     <icon/>
     <properties>
-        <propertyGroup caption="General">
-            <property key="disableBack" type="attribute" required="true">
-                <caption>Disable</caption>
-                <description>Boolean for enabling/disabling backhandler</description>
-                <attributeTypes>
-                    <attributeType name="Boolean"/>
-                </attributeTypes>
+        <propertyGroup caption="Events">
+            <property key="onBack" type="action" required="false">
+                <caption>On backpress</caption>
+                <description>Flow to call when hardware backbutton is used.</description>
             </property>
-        </propertyGroup>
+            </propertyGroup>
     </properties>
 </widget>

dist/tmp/widgets/incentro/backhandler/Backhandler.js

@@ -112,14 +112,14 @@ class Backhandler extends react__WEBPACK_IMPORTED_MODULE_0__["Component"] {
         return (Object(react__WEBPACK_IMPORTED_MODULE_0__["createElement"])(react_native__WEBPACK_IMPORTED_MODULE_1__["View"], null));
     }
     componentWillMount() {
-        if (this.props.disableBack) {
-            react_native__WEBPACK_IMPORTED_MODULE_1__["BackHandler"].addEventListener('hardwareBackPress', this.handleBackButtonClick);
-        }
+        react_native__WEBPACK_IMPORTED_MODULE_1__["BackHandler"].addEventListener('hardwareBackPress', this.handleBackButtonClick);
     }
     componentWillUnmount() {
         react_native__WEBPACK_IMPORTED_MODULE_1__["BackHandler"].removeEventListener('hardwareBackPress', this.handleBackButtonClick);
     }
     handleBackButtonClick() {
+        var _a;
+        (_a = this.props.onBack) === null || _a === void 0 ? void 0 : _a.execute();
         return true;
     }
 }