diff options
3 files changed, 13 insertions, 11 deletions
diff --git a/server/src/main/java/com/vaadin/navigator/ViewChangeListener.java b/server/src/main/java/com/vaadin/navigator/ViewChangeListener.java index b98fb967fc..9238f1bae9 100644 --- a/server/src/main/java/com/vaadin/navigator/ViewChangeListener.java +++ b/server/src/main/java/com/vaadin/navigator/ViewChangeListener.java @@ -21,13 +21,18 @@ import java.util.EventObject; /** * Interface for listening to View changes before and after they occur. - * + * <p> * Implementations of this interface can also block navigation between views - * before it is performed. + * before it is performed (using {@link #beforeViewChange(ViewChangeEvent)}). + * <p> + * The interface contains two methods {@link #beforeViewChange(ViewChangeEvent)} + * and {@link #afterViewChange(ViewChangeEvent)}. The latter one has default + * empty implementation. * * @author Vaadin Ltd * @since 7.0 */ +@FunctionalInterface public interface ViewChangeListener extends Serializable { /** @@ -124,10 +129,14 @@ public interface ViewChangeListener extends Serializable { * method blocked the view change, this method is not called. Be careful of * unbounded recursion if you decide to change the view again in the * listener. + * <p> + * By default it does nothing. Override it in your listener if you need this + * functionality. * * @param event * view change event */ - public void afterViewChange(ViewChangeEvent event); + public default void afterViewChange(ViewChangeEvent event) { + } } diff --git a/uitest/src/main/java/com/vaadin/tests/minitutorials/v70/SimpleLoginUI.java b/uitest/src/main/java/com/vaadin/tests/minitutorials/v70/SimpleLoginUI.java index 2d1c6bb687..f2f9c1b657 100644 --- a/uitest/src/main/java/com/vaadin/tests/minitutorials/v70/SimpleLoginUI.java +++ b/uitest/src/main/java/com/vaadin/tests/minitutorials/v70/SimpleLoginUI.java @@ -56,10 +56,6 @@ public class SimpleLoginUI extends UI { return true; } - @Override - public void afterViewChange(ViewChangeEvent event) { - - } }); } } diff --git a/uitest/src/main/java/com/vaadin/tests/navigator/NavigatorTest.java b/uitest/src/main/java/com/vaadin/tests/navigator/NavigatorTest.java index 392a3f3854..e726580cff 100644 --- a/uitest/src/main/java/com/vaadin/tests/navigator/NavigatorTest.java +++ b/uitest/src/main/java/com/vaadin/tests/navigator/NavigatorTest.java @@ -13,10 +13,10 @@ import com.vaadin.tests.util.Log; import com.vaadin.ui.Button; import com.vaadin.ui.Label; import com.vaadin.ui.Layout; +import com.vaadin.ui.RichTextArea; import com.vaadin.ui.TextField; import com.vaadin.ui.UI; import com.vaadin.ui.VerticalLayout; -import com.vaadin.ui.RichTextArea; import com.vaadin.v7.ui.Table; public class NavigatorTest extends UI { @@ -107,9 +107,6 @@ public class NavigatorTest extends UI { return true; } - @Override - public void afterViewChange(ViewChangeEvent event) { - } } class NaviButton extends Button { |