8134828: Scrollbar thumb disappears with Nimbus L&F

Reviewed-by: alexsch, alexp

src/share/classes/javax/swing/plaf/nimbus/AbstractRegionPainter.java

@@ -625,10 +625,6 @@ public abstract class AbstractRegionPainter implements Painter<JComponent> {
         // check if we can scale to the requested size
         Dimension canvas = ctx.canvasSize;
         Insets insets = ctx.stretchingInsets;
-        if (insets.left + insets.right > w || insets.top + insets.bottom > h) {
-            return;
-        }
-
         if (w <= (canvas.width * ctx.maxHorizontalScaleFactor) && h <= (canvas.height * ctx.maxVerticalScaleFactor)) {
             // get image at canvas size
             VolatileImage img = getImage(g.getDeviceConfiguration(), c, canvas.width, canvas.height, extendedCacheKeys);

src/share/classes/javax/swing/plaf/nimbus/skin.laf

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
- Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
+ Copyright (c) 1998, 2015, 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
@@ -16195,6 +16195,10 @@
                   <dimension width="150" height="19"/>
                </uiProperty>
                <uiProperty name="cycleTime" type="INT" value="250"/>
+               <uiProperty name="minBarSize" type="DIMENSION">
+                  <dimension width="6" height="6"/>
+               </uiProperty>
+               <uiProperty name="glowWidth" type="INT" value="2"/>
             </uiproperties>
          </style>
          <backgroundStates>
@@ -16351,7 +16355,7 @@
                <canvas>
                   <size width="27" height="19"/>
                   <nextLayerNameIndex>2</nextLayerNameIndex>
-                  <stretchingInsets top="5" bottom="5" left="5" right="5"/>
+                  <stretchingInsets top="3" bottom="3" left="3" right="3"/>
                   <layer name="Layer 1">
                      <opacity>1.0</opacity>
                      <fillOpacity>1.0</fillOpacity>
@@ -16444,7 +16448,7 @@
                <canvas>
                   <size width="27" height="19"/>
                   <nextLayerNameIndex>2</nextLayerNameIndex>
-                  <stretchingInsets top="5" bottom="5" left="5" right="5"/>
+                  <stretchingInsets top="3" bottom="3" left="3" right="3"/>
                   <layer name="Layer 1">
                      <opacity>1.0</opacity>
                      <fillOpacity>1.0</fillOpacity>
@@ -16528,7 +16532,7 @@
                <canvas>
                   <size width="30" height="13"/>
                   <nextLayerNameIndex>2</nextLayerNameIndex>
-                  <stretchingInsets top="5" bottom="5" left="5" right="5"/>
+                  <stretchingInsets top="3" bottom="3" left="3" right="3"/>
                   <layer name="Layer 1">
                      <opacity>1.0</opacity>
                      <fillOpacity>1.0</fillOpacity>
@@ -16619,7 +16623,7 @@
                <canvas>
                   <size width="27" height="19"/>
                   <nextLayerNameIndex>2</nextLayerNameIndex>
-                  <stretchingInsets top="5" bottom="5" left="5" right="5"/>
+                  <stretchingInsets top="3" bottom="3" left="3" right="3"/>
                   <layer name="Layer 1">
                      <opacity>1.0</opacity>
                      <fillOpacity>1.0</fillOpacity>
@@ -16701,7 +16705,7 @@
                <canvas>
                   <size width="27" height="19"/>
                   <nextLayerNameIndex>2</nextLayerNameIndex>
-                  <stretchingInsets top="5" bottom="5" left="5" right="5"/>
+                  <stretchingInsets top="3" bottom="3" left="3" right="3"/>
                   <layer name="Layer 1">
                      <opacity>1.0</opacity>
                      <fillOpacity>1.0</fillOpacity>
@@ -16785,7 +16789,7 @@
                <canvas>
                   <size width="30" height="13"/>
                   <nextLayerNameIndex>2</nextLayerNameIndex>
-                  <stretchingInsets top="5" bottom="5" left="5" right="5"/>
+                  <stretchingInsets top="3" bottom="3" left="3" right="3"/>
                   <layer name="Layer 1">
                      <opacity>1.0</opacity>
                      <fillOpacity>1.0</fillOpacity>

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

 /*
- * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2015, 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
@@ -49,6 +49,8 @@ public class SynthProgressBarUI extends BasicProgressBarUI
     private boolean paintOutsideClip;
     private boolean tileWhenIndeterminate; //whether to tile indeterminate painting
     private int tileWidth; //the width of each tile
+    private Dimension minBarSize; // minimal visible bar size
+    private int glowWidth; // Glow around the bar foreground
 
     /**
      * Creates a new UI object for the given component.
@@ -114,6 +116,8 @@ public class SynthProgressBarUI extends BasicProgressBarUI
                 tileWidth *= 0.784;
             }
         }
+        minBarSize = (Dimension)style.get(context, "ProgressBar.minBarSize");
+        glowWidth = style.getInt(context, "ProgressBar.glowWidth", 0);
         context.dispose();
     }
 
@@ -258,7 +262,7 @@ public class SynthProgressBarUI extends BasicProgressBarUI
 
                     if (!SynthLookAndFeel.isLeftToRight(pBar)) {
                         x = pBar.getWidth() - pBarInsets.right - width
-                                - progressPadding;
+                                - progressPadding - glowWidth;
                     }
                 } else {  // JProgressBar.VERTICAL
                     x = pBarInsets.left + progressPadding;
@@ -271,9 +275,9 @@ public class SynthProgressBarUI extends BasicProgressBarUI
                     y = pBar.getHeight() - pBarInsets.bottom - height
                             - progressPadding;
 
-                    // When the progress bar is vertical we always paint
-                    // from bottom to top, not matter what the component
-                    // orientation is.
+                    if (SynthLookAndFeel.isLeftToRight(pBar)) {
+                        y -= glowWidth;
+                    }
                 }
             }
         } else {
@@ -307,8 +311,11 @@ public class SynthProgressBarUI extends BasicProgressBarUI
             }
             g.setClip(clip);
         } else {
-            context.getPainter().paintProgressBarForeground(context, g,
-                    x, y, width, height, pBar.getOrientation());
+            if (minBarSize == null || (width >= minBarSize.width
+                    && height >= minBarSize.height)) {
+                context.getPainter().paintProgressBarForeground(context, g,
+                        x, y, width, height, pBar.getOrientation());
+            }
         }
 
         if (pBar.isStringPainted()) {

test/javax/swing/plaf/nimbus/8041642/ScrollBarThumbVisibleTest.java

+/*
+ * Copyright (c) 2015, 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 8134828
+   @summary Scrollbar thumb disappears with Nimbus L&F
+   @author Semyon Sadetsky
+*/
+
+import javax.swing.*;
+import java.awt.*;
+
+public class ScrollBarThumbVisibleTest
+{
+    private static JFrame frame;
+    private static Point point;
+    private static JScrollBar bar;
+
+    public static void main(String[] args) throws Exception {
+        for (UIManager.LookAndFeelInfo info : UIManager
+                .getInstalledLookAndFeels()) {
+            if ("Nimbus".equals(info.getName())) {
+                try {
+                    UIManager.setLookAndFeel(info.getClassName());
+                } catch (Exception ex) {
+                }
+                break;
+            }
+        }
+        try {
+            SwingUtilities.invokeAndWait(new Runnable() {
+                public void run() {
+                    frame = new JFrame();
+                    frame.setUndecorated(true);
+                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+                    setup(frame);
+                }
+            });
+            final Robot robot = new Robot();
+            robot.delay(200);
+            robot.waitForIdle();
+            SwingUtilities.invokeAndWait(new Runnable() {
+                @Override
+                public void run() {
+                    point = bar.getLocationOnScreen();
+                }
+            });
+            Color color1 = robot.getPixelColor(point.x + 48, point.y + 55);
+            Color color2 = robot.getPixelColor(point.x + 48, point.y + 125);
+            System.out.println(color1);
+            System.out.println(color2);
+           if (color1.equals(color2)) {
+                throw new RuntimeException("Thump is not visible");
+            }
+        } finally {
+            SwingUtilities.invokeAndWait(new Runnable() {
+                @Override
+                public void run() {
+                    frame.dispose();
+                }
+            });
+        }
+        System.out.println("ok");
+    }
+
+    static void setup(JFrame frame) {
+        bar = new JScrollBar(Adjustable.VERTICAL, 500, 0, 0, 1000);
+        frame.getContentPane().add(bar);
+        frame.setSize(50, 250);
+        frame.setLocation(100, 100);
+        frame.setVisible(true);
+    }
+}