From 2dbe14ef7ef576990dff6897320da3471cbfbcc5 Mon Sep 17 00:00:00 2001
From: Anton Nashatyrev <anashaty@openjdk.org>
Date: Thu, 3 Jul 2014 18:47:42 +0400
Subject: [PATCH] 8044371: setOneTouchExpandable functionality of JSplitPane
 will reduce vertical Scrollbar

Reviewed-by: alexp, alexsch
---
 .../classes/javax/swing/ScrollPaneLayout.java | 10 +--
 .../javax/swing/JScrollPane/bug8044371.java   | 88 +++++++++++++++++++
 2 files changed, 90 insertions(+), 8 deletions(-)
 create mode 100644 jdk/test/javax/swing/JScrollPane/bug8044371.java

diff --git a/jdk/src/share/classes/javax/swing/ScrollPaneLayout.java b/jdk/src/share/classes/javax/swing/ScrollPaneLayout.java
index 4d353253a3c..7903b85958b 100644
--- a/jdk/src/share/classes/javax/swing/ScrollPaneLayout.java
+++ b/jdk/src/share/classes/javax/swing/ScrollPaneLayout.java
@@ -823,10 +823,7 @@ public class ScrollPaneLayout
         Rectangle vsbR = new Rectangle(0, availR.y - vpbInsets.top, 0, 0);
 
         boolean vsbNeeded;
-        if (isEmpty) {
-            vsbNeeded = false;
-        }
-        else if (vsbPolicy == VERTICAL_SCROLLBAR_ALWAYS) {
+        if (vsbPolicy == VERTICAL_SCROLLBAR_ALWAYS) {
             vsbNeeded = true;
         }
         else if (vsbPolicy == VERTICAL_SCROLLBAR_NEVER) {
@@ -849,10 +846,7 @@ public class ScrollPaneLayout
 
         Rectangle hsbR = new Rectangle(availR.x - vpbInsets.left, 0, 0, 0);
         boolean hsbNeeded;
-        if (isEmpty) {
-            hsbNeeded = false;
-        }
-        else if (hsbPolicy == HORIZONTAL_SCROLLBAR_ALWAYS) {
+        if (hsbPolicy == HORIZONTAL_SCROLLBAR_ALWAYS) {
             hsbNeeded = true;
         }
         else if (hsbPolicy == HORIZONTAL_SCROLLBAR_NEVER) {
diff --git a/jdk/test/javax/swing/JScrollPane/bug8044371.java b/jdk/test/javax/swing/JScrollPane/bug8044371.java
new file mode 100644
index 00000000000..2e83385fb8d
--- /dev/null
+++ b/jdk/test/javax/swing/JScrollPane/bug8044371.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2014, 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 8044371
+ * @summary setOneTouchExpandable functionality of JSplitPane will reduce vertical Scrollbar
+ * @author Anton Nashatyrev
+ * @library ..
+ */
+
+
+import javax.swing.*;
+import javax.swing.plaf.metal.MetalLookAndFeel;
+import java.awt.*;
+import java.awt.event.AdjustmentEvent;
+import java.awt.event.AdjustmentListener;
+
+public class bug8044371 implements AdjustmentListener {
+    JSplitPane sptPane;
+    int lastAdjust = 0;
+    int initialAdjust = 0;
+
+    public static void main(String[] args) throws Throwable {
+        UIManager.setLookAndFeel(MetalLookAndFeel.class.getName());
+        SwingTest.start(bug8044371.class);
+    }
+
+    public bug8044371(JFrame frame) {
+        JPanel p = new JPanel();
+        final JScrollPane jScrollPane = new JScrollPane(new JPanel()
+        {{setPreferredSize(new Dimension(1500,1500));}},
+                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
+                JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
+        jScrollPane.getViewport().scrollRectToVisible(new Rectangle(1500, 1500, 0, 0));
+        jScrollPane.getVerticalScrollBar().addAdjustmentListener(this);
+
+        sptPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, jScrollPane, p);
+        sptPane.setDividerLocation(90);
+        sptPane.setOneTouchExpandable(true);
+        frame.getContentPane().add(sptPane);
+    }
+
+    public void adjustmentValueChanged(AdjustmentEvent e) {
+        System.out.println( "adjustmentValueChanged: "  + e.getValue());
+        lastAdjust = e.getValue();
+    }
+
+    public void step1() {
+        if (lastAdjust == 0) {
+            throw new RuntimeException("Adjustment == 0");
+        }
+        initialAdjust =  lastAdjust;
+        sptPane.setDividerLocation(0);
+    }
+
+    public void step2() {
+        if (lastAdjust < initialAdjust) {
+            throw new RuntimeException("Failed: Adjustment decreased: " + lastAdjust);
+        }
+        sptPane.setDividerLocation(90);
+    }
+    public void step3() {
+        if (lastAdjust < initialAdjust) {
+            throw new RuntimeException("Failed: Adjustment decreased: " + lastAdjust);
+        }
+    }
+}