Implement SimpleManagedLayout for CompositeConnector (#9791)

Fixes #9788

client/src/main/java/com/vaadin/client/ui/composite/CompositeConnector.java

@@ -20,8 +20,10 @@ import com.google.gwt.user.client.ui.Label;
 import com.google.gwt.user.client.ui.Widget;
 import com.vaadin.client.ComponentConnector;
 import com.vaadin.client.ConnectorHierarchyChangeEvent;
+import com.vaadin.client.DirectionalManagedLayout;
 import com.vaadin.client.HasComponentsConnector;
 import com.vaadin.client.ui.AbstractHasComponentsConnector;
+import com.vaadin.client.ui.SimpleManagedLayout;
 import com.vaadin.shared.AbstractComponentState;
 import com.vaadin.shared.MouseEventDetails;
 import com.vaadin.shared.ui.Connect;
@@ -35,7 +37,8 @@ import com.vaadin.ui.Composite;
  * @since 8.1
  */
 @Connect(value = Composite.class, loadStyle = LoadStyle.EAGER)
-public class CompositeConnector extends AbstractHasComponentsConnector {
+public class CompositeConnector extends AbstractHasComponentsConnector
+        implements SimpleManagedLayout {
 
     private ComponentConnector childConnector;
 
@@ -97,8 +100,20 @@ public class CompositeConnector extends AbstractHasComponentsConnector {
     }
 
     @Override
-    protected void sendContextClickEvent(MouseEventDetails details, EventTarget eventTarget) {
-        //Do nothing, because Composite is not an actual component, and the event
-        //must be handled in inner components.
+    protected void sendContextClickEvent(MouseEventDetails details,
+            EventTarget eventTarget) {
+        // Do nothing, because Composite is not an actual component, and the
+        // event must be handled in inner components.
+    }
+
+    @Override
+    public void layout() {
+        // Pass on the layout to the appropriate method in child connector
+        if (childConnector instanceof SimpleManagedLayout) {
+            ((SimpleManagedLayout) childConnector).layout();
+        } else if (childConnector instanceof DirectionalManagedLayout) {
+            ((DirectionalManagedLayout) childConnector).layoutHorizontally();
+            ((DirectionalManagedLayout) childConnector).layoutVertically();
+        }
     }
 }

uitest/src/main/java/com/vaadin/tests/components/tree/TreeOnBrowserResize.java

@@ -0,0 +1,24 @@
+package com.vaadin.tests.components.tree;
+
+import com.vaadin.annotations.Widgetset;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.Tree;
+
+@Widgetset("com.vaadin.DefaultWidgetSet")
+public class TreeOnBrowserResize extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        Tree<String> tree = new Tree<>();
+        tree.setItems(
+                "Lorem ipsum dolor sit amet, consectetur adipiscing elit. "
+                        + "Ut a ante congue, dictum elit vitae, mollis justo. "
+                        + "Nunc porttitor, eros et eleifend accumsan, quam dolor venenatis tortor, "
+                        + "in euismod lorem massa quis nisi. In pretium viverra tincidunt. ");
+
+        tree.setSizeFull();
+        addComponent(tree);
+    }
+
+}

uitest/src/test/java/com/vaadin/tests/components/tree/TreeOnBrowserResizeTest.java

@@ -0,0 +1,41 @@
+package com.vaadin.tests.components.tree;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.openqa.selenium.Dimension;
+
+import com.vaadin.testbench.elements.TreeGridElement;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+
+public class TreeOnBrowserResizeTest extends MultiBrowserTest {
+
+    @Test
+    public void testTreeSizeOnBrowserShrink() {
+        openTestURL();
+
+        int originalWidth = $(TreeGridElement.class).first().getTableWrapper()
+                .getSize().getWidth();
+
+        getDriver().manage().window().setSize(new Dimension(600, 800));
+
+        Assert.assertTrue("Tree size should decrease.",
+                originalWidth > $(TreeGridElement.class).first()
+                        .getTableWrapper().getSize().getWidth());
+    }
+
+    @Test
+    public void testTreeSizeOnBrowserEnlarge() {
+        getDriver().manage().window().setSize(new Dimension(600, 800));
+        openTestURL();
+
+        int originalWidth = $(TreeGridElement.class).first().getTableWrapper()
+                .getSize().getWidth();
+
+        getDriver().manage().window().setSize(new Dimension(800, 800));
+
+        Assert.assertTrue("Tree size should increase.",
+                originalWidth < $(TreeGridElement.class).first()
+                        .getTableWrapper().getSize().getWidth());
+    }
+
+}