1 /* 2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.apple.laf; 27 28 import java.awt.event.*; 29 30 import javax.swing.*; 31 import javax.swing.plaf.ComponentUI; 32 33 public class AquaScrollPaneUI extends javax.swing.plaf.basic.BasicScrollPaneUI { 34 public static ComponentUI createUI(final JComponent x) { 35 return new AquaScrollPaneUI(); 36 } 37 38 protected MouseWheelListener createMouseWheelListener() { 39 return new XYMouseWheelHandler(); 40 } 41 42 // This is a grody hack to trick BasicScrollPaneUI into scrolling horizontally 43 // when we notice that the shift key is down. This should be removed when AWT/Swing 44 // becomes aware of of multi-axis scroll wheels. 45 protected class XYMouseWheelHandler extends javax.swing.plaf.basic.BasicScrollPaneUI.MouseWheelHandler { 46 public void mouseWheelMoved(final MouseWheelEvent e) { 47 JScrollBar vScrollBar = null; 48 boolean wasVisible = false; 49 50 if (e.isShiftDown()) { 51 vScrollBar = scrollpane.getVerticalScrollBar(); 52 if (vScrollBar != null) { 53 wasVisible = vScrollBar.isVisible(); 54 vScrollBar.setVisible(false); 55 } 56 } 57 58 super.mouseWheelMoved(e); 59 60 if (wasVisible) { 61 vScrollBar.setVisible(true); 62 } 63 } 64 } 65 }