test/jdk/java/awt/ScrollPane/ScrollPaneValidateTest.java
changeset 49227 96bebffe0be1
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/awt/ScrollPane/ScrollPaneValidateTest.java	Thu Mar 08 14:31:54 2018 +0530
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2018, 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
+ * @key headful
+ * @bug 8195738
+ * @summary scroll position in ScrollPane is reset after calling validate()
+ * @run main ScrollPaneValidateTest
+ */
+
+import java.awt.ScrollPane;
+import java.awt.BorderLayout;
+import java.awt.GridLayout;
+import java.awt.Button;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Panel;
+import java.awt.Point;
+import java.awt.Robot;
+import java.awt.AWTException;
+
+public class ScrollPaneValidateTest extends Frame {
+  ScrollPane pane;
+
+  public ScrollPaneValidateTest() {
+    setBounds(300, 300, 300, 300);
+    pane = new ScrollPane(ScrollPane.SCROLLBARS_NEVER);
+    add(pane, BorderLayout.NORTH);
+    pane.add(new InnerPanel());
+  }
+
+  public static void main(String[] args) throws AWTException {
+    Robot robot = new Robot();
+    final ScrollPaneValidateTest obj = new ScrollPaneValidateTest();
+    obj.setVisible(true);
+
+    // set to some scroll position
+    obj.pane.setScrollPosition(600, 200);
+
+    // get the newly set position
+    Point scrollPosition = obj.pane.getScrollPosition();
+
+    // call validate multiple times
+    obj.pane.validate();
+    robot.delay(1000);
+    obj.pane.validate();
+    robot.delay(1000);
+
+    // compare position after calling the validate function
+    if(!scrollPosition.equals(obj.pane.getScrollPosition())) {
+      obj.dispose();
+      throw new RuntimeException("Scrolling position is changed in ScrollPane");
+    }
+
+    obj.dispose();
+    return;
+  }
+
+  class InnerPanel extends Panel {
+    public InnerPanel() {
+      this.setLayout(new GridLayout(2, 4));
+      for (int i = 1; i <= 8; i++) {
+        this.add(new Button("Button" + i));
+      }
+    }
+
+    public Dimension getPreferredSize() {
+      return new Dimension(980, 200);
+    }
+  }
+}