Make table selectable based on presence of ValueChangeListener (#13864).

Change-Id: I272703f1e3178c91a2b1e3e4d0f7c79e4c86e552

server/src/com/vaadin/ui/Table.java

@@ -62,6 +62,7 @@ import com.vaadin.server.Resource;
 import com.vaadin.shared.MouseEventDetails;
 import com.vaadin.shared.ui.MultiSelectMode;
 import com.vaadin.shared.ui.table.TableConstants;
+import com.vaadin.shared.util.SharedUtil;
 
 /**
  * <p>
@@ -442,7 +443,7 @@ public class Table extends AbstractSelect implements Action.Container,
     /**
      * Holds value of property selectable.
      */
-    private boolean selectable = false;
+    private Boolean selectable;
 
     /**
      * Holds value of property columnHeaderMode.
@@ -1601,15 +1602,19 @@ public class Table extends AbstractSelect implements Action.Container,
     }
 
     /**
-     * Getter for property selectable.
+     * Returns whether table is selectable.
      * 
      * <p>
-     * The table is not selectable by default.
+     * The table is not selectable until it's explicitly set as selectable or at
+     * least one {@link ValueChangeListener} is added.
      * </p>
      * 
-     * @return the Value of property selectable.
+     * @return whether table is selectable.
      */
     public boolean isSelectable() {
+        if (selectable == null) {
+            return hasListeners(ValueChangeEvent.class);
+        }
         return selectable;
     }
 
@@ -1617,14 +1622,16 @@ public class Table extends AbstractSelect implements Action.Container,
      * Setter for property selectable.
      * 
      * <p>
-     * The table is not selectable by default.
+     * The table is not selectable until it's explicitly set as selectable via
+     * this method or alternatively at least one {@link ValueChangeListener} is
+     * added.
      * </p>
      * 
      * @param selectable
      *            the New value of property selectable.
      */
     public void setSelectable(boolean selectable) {
-        if (this.selectable != selectable) {
+        if (!SharedUtil.equals(this.selectable, selectable)) {
             this.selectable = selectable;
             markAsDirty();
         }

server/tests/src/com/vaadin/tests/server/component/table/TableSelectable.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2000-2014 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.tests.server.component.table;
+
+import org.easymock.EasyMock;
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.vaadin.data.Property.ValueChangeListener;
+import com.vaadin.ui.Table;
+
+/**
+ * Tests for 'selectable' property of {@link Table} class.
+ * 
+ * @author Vaadin Ltd
+ */
+public class TableSelectable {
+
+    @Test
+    public void setSelectable_explicitSelectable_tableIsSelectable() {
+        Table table = new Table();
+        table.setSelectable(true);
+
+        Assert.assertTrue(table.isSelectable());
+    }
+
+    @Test
+    public void addValueChangeListener_explicitSelectable_tableIsSelectable() {
+        TestTable table = new TestTable();
+        table.addValueChangeListener(EasyMock
+                .createMock(ValueChangeListener.class));
+
+        Assert.assertTrue(table.isSelectable());
+        Assert.assertTrue(table.markAsDirtyCalled);
+    }
+
+    @Test
+    public void tableIsNotSelectableByDefult() {
+        Table table = new Table();
+
+        Assert.assertFalse(table.isSelectable());
+    }
+
+    @Test
+    public void setSelectable_explicitNotSelectable_tableIsNotSelectable() {
+        Table table = new Table();
+        table.setSelectable(false);
+        table.addValueChangeListener(EasyMock
+                .createMock(ValueChangeListener.class));
+
+        Assert.assertFalse(table.isSelectable());
+    }
+
+    private static final class TestTable extends Table {
+        @Override
+        public void markAsDirty() {
+            markAsDirtyCalled = true;
+        }
+
+        private boolean markAsDirtyCalled;
+    }
+}