6848475: JSlider does not display the correct value of its BoundedRangeModel

Reviewed-by: peterz

jdk/src/share/classes/javax/swing/plaf/basic/BasicSliderUI.java

@@ -1571,20 +1571,8 @@ public class BasicSliderUI extends SliderUI{
             offset = 0;
             scrollTimer.stop();
 
-            // This is the way we have to determine snap-to-ticks.  It's
-            // hard to explain but since ChangeEvents don't give us any
-            // idea what has changed we don't have a way to stop the thumb
-            // bounds from being recalculated.  Recalculating the thumb
-            // bounds moves the thumb over the current value (i.e., snapping
-            // to the ticks).
-            if (slider.getSnapToTicks() /*|| slider.getSnapToValue()*/ ) {
-                isDragging = false;
-                slider.setValueIsAdjusting(false);
-            }
-            else {
-                slider.setValueIsAdjusting(false);
-                isDragging = false;
-            }
+            isDragging = false;
+            slider.setValueIsAdjusting(false);
             slider.repaint();
         }
 

jdk/test/javax/swing/JSlider/6848475/bug6848475.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @bug 6848475
+ * @summary JSlider does not display the correct value of its BoundedRangeModel
+ * @author Pavel Porvatov
+ * @run main bug6848475
+ */
+
+import sun.awt.SunToolkit;
+
+import javax.swing.*;
+import javax.swing.plaf.SliderUI;
+import javax.swing.plaf.basic.BasicSliderUI;
+import java.awt.*;
+import java.awt.event.InputEvent;
+import java.lang.reflect.Field;
+
+public class bug6848475 {
+    private static JFrame frame;
+
+    private static JSlider slider;
+
+    private static Robot robot;
+
+    private static int thumbRectX;
+
+    public static void main(String[] args) throws Exception {
+        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
+
+        robot = new Robot();
+        robot.setAutoDelay(100);
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                frame = new JFrame();
+
+                DefaultBoundedRangeModel sliderModel = new DefaultBoundedRangeModel() {
+                    public void setValue(int n) {
+                        // Don't allow value to be changed
+                    }
+                };
+
+                slider = new JSlider(sliderModel);
+
+                frame.getContentPane().add(slider);
+                frame.pack();
+                frame.setVisible(true);
+            }
+        });
+
+        toolkit.realSync();
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                Point p = slider.getLocationOnScreen();
+
+                robot.mouseMove(p.x, p.y);
+            }
+        });
+
+        toolkit.realSync();
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                thumbRectX = getThumbRectField().x;
+
+                Point p = slider.getLocationOnScreen();
+
+                robot.mouseMove(p.x, p.y);
+                robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+                robot.mouseMove(p.x + 20, p.y);
+                robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+            }
+        });
+
+        toolkit.realSync();
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                Rectangle newThumbRect = getThumbRectField();
+
+                if (newThumbRect.x != thumbRectX) {
+                    throw new RuntimeException("Test failed: the thumb was moved");
+                }
+
+                frame.dispose();
+            }
+        });
+    }
+
+    private static Rectangle getThumbRectField() {
+        try {
+            SliderUI ui = slider.getUI();
+
+            Field field = BasicSliderUI.class.getDeclaredField("thumbRect");
+
+            field.setAccessible(true);
+
+            return (Rectangle) field.get(ui);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}