8003273: Missing testcase for 7171812

Reviewed-by: art, serb

test/javax/swing/dnd/7171812/JListWithScroll.java

+/*
+ * Copyright (c) 2012, 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.
+ */
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.dnd.Autoscroll;
+
+public class JListWithScroll<E> extends JList<E> implements Autoscroll {
+    private Insets scrollInsets;
+
+    public JListWithScroll(E[] listData) {
+        super(listData);
+        scrollInsets = new Insets(50, 50, 50, 50);
+    }
+
+    @Override
+    public Insets getAutoscrollInsets() {
+        return scrollInsets;
+    }
+
+    @Override
+    public void autoscroll(Point cursorLoc) {
+        JViewport viewport = getViewport();
+
+        if (viewport == null) {
+            return;
+        }
+
+        Point viewPos = viewport.getViewPosition();
+        int viewHeight = viewport.getExtentSize().height;
+        int viewWidth = viewport.getExtentSize().width;
+
+        if ((cursorLoc.y - viewPos.y) < scrollInsets.top) {
+            viewport.setViewPosition(new Point(viewPos.x, Math.max(viewPos.y - scrollInsets.top, 0)));
+        } else if (((viewPos.y + viewHeight) - cursorLoc.y) < scrollInsets.bottom) {
+            viewport.setViewPosition(
+                    new Point(viewPos.x, Math.min(viewPos.y + scrollInsets.bottom, this.getHeight() - viewHeight))
+            );
+        } else if ((cursorLoc.x - viewPos.x) < scrollInsets.left) {
+            viewport.setViewPosition(new Point(Math.max(viewPos.x - scrollInsets.left, 0), viewPos.y));
+        } else if (((viewPos.x + viewWidth) - cursorLoc.x) < scrollInsets.right) {
+            viewport.setViewPosition(
+                    new Point(Math.min(viewPos.x + scrollInsets.right, this.getWidth() - viewWidth), viewPos.y)
+            );
+        }
+
+    }
+
+    public JViewport getViewport() {
+        Component curComp = this;
+
+        while (!(curComp instanceof JViewport) && (curComp != null)) {
+            curComp = curComp.getParent();
+        }
+        if(curComp instanceof JViewport) {
+            return (JViewport) curComp;
+        } else {
+            return null;
+        }
+    }
+}

test/javax/swing/dnd/7171812/bug7171812.java

+/*
+ * Copyright (c) 2012, 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 7171812
+   @summary [macosx] Views keep scrolling back to the drag position after DnD
+   @author Alexander Zuev
+   @run main bug7171812
+ */
+
+import sun.awt.SunToolkit;
+
+import java.awt.*;
+import java.awt.dnd.*;
+import java.awt.event.InputEvent;
+import javax.swing.*;
+
+public class bug7171812 {
+    static JFrame mainFrame;
+    static String listData[];
+    static JListWithScroll<String> list;
+    static JScrollPane scrollPane;
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) throws Exception{
+        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                setupGUI();
+            }
+        });
+        toolkit.realSync();
+
+        Robot robot = new Robot();
+        robot.setAutoDelay(10);
+        robot.mouseMove(scrollPane.getLocationOnScreen().x + 5, scrollPane.getLocationOnScreen().y + 5);
+        robot.mousePress(InputEvent.BUTTON1_MASK);
+        for(int offset = 5; offset < scrollPane.getHeight()-20; offset++) {
+            robot.mouseMove(scrollPane.getLocationOnScreen().x+5, scrollPane.getLocationOnScreen().y+offset);
+        }
+        for(int offset = 5; offset < 195; offset++) {
+            robot.mouseMove(scrollPane.getLocationOnScreen().x+offset, scrollPane.getLocationOnScreen().y+scrollPane.getHeight()-20);
+        }
+        robot.mouseRelease(InputEvent.BUTTON1_MASK);
+        try {
+            SwingUtilities.invokeAndWait(new Runnable() {
+                @Override
+                public void run() {
+                    if(scrollPane.getViewport().getViewPosition().getY() < 30) {
+                        throw new RuntimeException("Incorrect view position.");
+                    };
+                }
+            });
+        } catch (java.lang.reflect.InvocationTargetException ite) {
+            throw new RuntimeException("Test failed, scroll on drag doesn't work!");
+        }
+    }
+
+    public static void setupGUI() {
+        listData = new String[100];
+        for (int i=0; i<100; i++) {
+            listData[i] = "Long Line With Item "+i;
+        }
+        mainFrame = new JFrame("Rest frame");
+        mainFrame.setSize(300, 500);
+        mainFrame.setLayout(new BorderLayout());
+        list = new JListWithScroll(listData);
+        list.setDragEnabled(true);
+        list.setAutoscrolls(true);
+        final DropTarget dropTarget = new DropTarget(list, DnDConstants.ACTION_MOVE, new DropTargetListener() {
+            @Override
+            public void dragEnter(DropTargetDragEvent dtde) {
+                dragOver(dtde);
+            }
+
+            @Override
+            public void dragOver(DropTargetDragEvent dtde) {
+                dtde.acceptDrag(DnDConstants.ACTION_MOVE);
+            }
+
+            @Override
+            public void dropActionChanged(DropTargetDragEvent dtde) {
+            }
+
+            @Override
+            public void dragExit(DropTargetEvent dte) {
+            }
+
+            @Override
+            public void drop(DropTargetDropEvent dtde) {
+            }
+        }, true);
+        scrollPane = new JScrollPane(list);
+        mainFrame.add(scrollPane, BorderLayout.CENTER);
+        mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        mainFrame.setLocation(100, 100);
+        mainFrame.setVisible(true);
+    }
+}