7082443: JComboBox not backward compatible (with Java 6)

Reviewed-by: alexp

src/share/classes/javax/swing/plaf/synth/SynthComboBoxUI.java

@@ -447,10 +447,20 @@ public class SynthComboBoxUI extends BasicComboBoxUI implements
     private class SynthComboBoxRenderer extends JLabel implements ListCellRenderer<Object>, UIResource {
         public SynthComboBoxRenderer() {
             super();
-            setName("ComboBox.renderer");
             setText(" ");
         }
 
+        @Override
+        public String getName() {
+            // SynthComboBoxRenderer should have installed Name while constructor is working.
+            // The setName invocation in the SynthComboBoxRenderer() constructor doesn't work
+            // because of the opaque property is installed in the constructor based on the
+            // component name (see GTKStyle.isOpaque())
+            String name = super.getName();
+
+            return name == null ? "ComboBox.renderer" : name;
+        }
+
         @Override
         public Component getListCellRendererComponent(JList<?> list, Object value,
                          int index, boolean isSelected, boolean cellHasFocus) {

test/javax/swing/JComboBox/7082443/bug7082443.java

+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @bug 7082443
+ * @summary JComboBox not backward compatible (with Java 6)
+ * @author Pavel Porvatov
+ */
+
+import javax.swing.*;
+import java.awt.*;
+
+public class bug7082443 {
+    public static final String GTK_LAF_CLASS = "GTKLookAndFeel";
+
+    public static void main(String[] args) throws Exception {
+        for (UIManager.LookAndFeelInfo lookAndFeelInfo : UIManager.getInstalledLookAndFeels()) {
+            if (lookAndFeelInfo.getClassName().contains(GTK_LAF_CLASS)) {
+                UIManager.setLookAndFeel(lookAndFeelInfo.getClassName());
+
+                SwingUtilities.invokeAndWait(new Runnable() {
+                    @Override
+                    public void run() {
+                        TestComboBox testComboBox = new TestComboBox();
+
+                        if (testComboBox.isOldRendererOpaque()) {
+                            System.out.println("Passed for " + GTK_LAF_CLASS);
+                        } else {
+                            throw new RuntimeException("Failed for " + GTK_LAF_CLASS);
+                        }
+                    }
+                });
+
+                return;
+            }
+        }
+
+        System.out.println(GTK_LAF_CLASS + " is not found. The test skipped");
+    }
+
+    private static class TestComboBox extends JComboBox {
+        private final ListCellRenderer renderer = new ListCellRenderer() {
+            @Override
+            public Component getListCellRendererComponent(JList list, Object value, int index,
+                                                          boolean isSelected, boolean cellHasFocus) {
+                return TestComboBox.super.getRenderer().getListCellRendererComponent(list, value, index,
+                        isSelected, cellHasFocus);
+            }
+        };
+
+        @Override
+        public ListCellRenderer getRenderer() {
+            return renderer;
+        }
+
+        public boolean isOldRendererOpaque() {
+            return ((JLabel) super.getRenderer()).isOpaque();
+        }
+    }
+}
+