Adds a scrollbar to table column drop down (#14156).

Change-Id: I7ce7c61f842a09af1842a14fedec3412120944c7

WebContent/VAADIN/themes/base/common/common.scss

@@ -146,6 +146,12 @@ body &.v-app .v-app-loading {
 	border: 0;
 	margin: 0;
 }
+
+.v-contextmenu .gwt-MenuBar {
+	overflow-y: auto;
+	overflow-x: hidden;
+}
+
 .v-contextmenu .gwt-MenuItem div {
 	cursor: pointer;
 	vertical-align: middle;

client/src/com/vaadin/client/ui/VContextMenu.java

@@ -161,6 +161,8 @@ public class VContextMenu extends VOverlay implements SubPartAware {
                     top = top - offsetHeight;
                     if (top < 0) {
                         top = 0;
+
+                        setHeight(Window.getClientHeight() + "px");
                     }
                 }
                 setPopupPosition(left, top);

uitest/src/com/vaadin/tests/components/table/TableTooManyColumns.java

@@ -0,0 +1,65 @@
+/*
+ * 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.components.table;
+
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.ui.Table;
+import com.vaadin.ui.Table.ColumnGenerator;
+
+public class TableTooManyColumns extends AbstractTestUI {
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        Table table = new Table();
+
+        table.setColumnCollapsingAllowed(true);
+
+        for (int i = 0; i < 91; i++) {
+            table.addGeneratedColumn("COLUMN " + i, new ColumnGenerator() {
+
+                @Override
+                public Object generateCell(Table source, Object itemId,
+                        Object columnId) {
+                    return columnId;
+                }
+            });
+        }
+
+        addComponent(table);
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see com.vaadin.tests.components.AbstractTestUI#getTestDescription()
+     */
+    @Override
+    protected String getTestDescription() {
+        return "Table column drop down becomes too large to fit the screen.";
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see com.vaadin.tests.components.AbstractTestUI#getTicketNumber()
+     */
+    @Override
+    protected Integer getTicketNumber() {
+        return 14156;
+    }
+
+}

uitest/src/com/vaadin/tests/components/table/TableTooManyColumnsTest.java

@@ -0,0 +1,46 @@
+/*
+ * 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.components.table;
+
+import java.io.IOException;
+
+import org.junit.Test;
+import org.openqa.selenium.WebElement;
+
+import com.vaadin.testbench.By;
+import com.vaadin.testbench.commands.TestBenchElementCommands;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+
+public class TableTooManyColumnsTest extends MultiBrowserTest {
+
+    @Test
+    public void testDropdownTable() throws IOException {
+        openTestURL();
+
+        WebElement element = findElement(By
+                .className("v-table-column-selector"));
+
+        element.click();
+
+        WebElement menu = findElement(By.className("gwt-MenuBar-vertical"));
+
+        TestBenchElementCommands scrollable = testBenchElement(menu);
+        scrollable.scroll(3000);
+
+        compareScreen(getScreenshotBaseName());
+    }
+
+}