| /* |
| * Copyright (c) 2011, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package sun.lwawt.macosx; |
| |
| import java.awt.*; |
| import java.awt.image.BufferedImage; |
| |
| public class CCustomCursor extends Cursor { |
| static Dimension sMaxCursorSize; |
| static Dimension getMaxCursorSize() { |
| if (sMaxCursorSize != null) return sMaxCursorSize; |
| final Rectangle bounds = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration().getBounds(); |
| return sMaxCursorSize = new Dimension(bounds.width / 2, bounds.height / 2); |
| } |
| |
| Image fImage; |
| Point fHotspot; |
| int fWidth; |
| int fHeight; |
| |
| public CCustomCursor(final Image cursor, final Point hotSpot, final String name) throws IndexOutOfBoundsException, HeadlessException { |
| super(name); |
| fImage = cursor; |
| fHotspot = hotSpot; |
| |
| // This chunk of code is copied from sun.awt.CustomCursor |
| final Toolkit toolkit = Toolkit.getDefaultToolkit(); |
| |
| // Make sure image is fully loaded. |
| final Component c = new Canvas(); // for its imageUpdate method |
| final MediaTracker tracker = new MediaTracker(c); |
| // MediaTracker loads resolution variants from MultiResolution Toolkit image |
| tracker.addImage(fImage, 0); |
| try { |
| tracker.waitForAll(); |
| } catch (final InterruptedException e) {} |
| |
| int width = fImage.getWidth(c); |
| int height = fImage.getHeight(c); |
| |
| // Fix for bug 4212593 The Toolkit.createCustomCursor does not |
| // check absence of the image of cursor |
| // If the image is invalid, the cursor will be hidden (made completely |
| // transparent). |
| if (tracker.isErrorAny() || width < 0 || height < 0) { |
| fHotspot.x = fHotspot.y = 0; |
| width = height = 1; |
| fImage = createTransparentImage(width, height); |
| } else { |
| // Get the nearest supported cursor size |
| final Dimension nativeSize = toolkit.getBestCursorSize(width, height); |
| width = nativeSize.width; |
| height = nativeSize.height; |
| } |
| |
| fWidth = width; |
| fHeight = height; |
| |
| // NOTE: this was removed for 3169146, but in 1.5 the JCK tests for an exception and fails if one isn't thrown. |
| // See what JBuilder does. |
| // Verify that the hotspot is within cursor bounds. |
| if (fHotspot.x >= width || fHotspot.y >= height || fHotspot.x < 0 || fHotspot.y < 0) { |
| throw new IndexOutOfBoundsException("invalid hotSpot"); |
| } |
| |
| // Must normalize the hotspot |
| if (fHotspot.x >= width) { |
| fHotspot.x = width - 1; // it is zero based. |
| } else if (fHotspot.x < 0) { |
| fHotspot.x = 0; |
| } |
| if (fHotspot.y >= height) { |
| fHotspot.y = height - 1; // it is zero based. |
| } else if (fHotspot.y < 0) { |
| fHotspot.y = 0; |
| } |
| } |
| |
| private static BufferedImage createTransparentImage(int w, int h) { |
| GraphicsEnvironment ge = |
| GraphicsEnvironment.getLocalGraphicsEnvironment(); |
| GraphicsDevice gs = ge.getDefaultScreenDevice(); |
| GraphicsConfiguration gc = gs.getDefaultConfiguration(); |
| |
| BufferedImage img = gc.createCompatibleImage(w, h, Transparency.BITMASK); |
| Graphics2D g = (Graphics2D)img.getGraphics(); |
| g.setBackground(new Color(0, 0, 0, 0)); |
| g.clearRect(0, 0, w, h); |
| g.dispose(); |
| |
| return img; |
| } |
| |
| public static Dimension getBestCursorSize(final int preferredWidth, final int preferredHeight) { |
| // With Panther, cursors have no limit on their size. So give the client their |
| // preferred size, but no larger than half the dimensions of the main screen |
| // This will allow large cursors, but not cursors so large that they cover the |
| // screen. Since solaris nor windows allow cursors this big, this shouldn't be |
| // a limitation. |
| // JCK triggers an overflow in the int -- if we get a bizarre value normalize it. |
| final Dimension maxCursorSize = getMaxCursorSize(); |
| final Dimension d = new Dimension(Math.max(1, Math.abs(preferredWidth)), Math.max(1, Math.abs(preferredHeight))); |
| return new Dimension(Math.min(d.width, maxCursorSize.width), Math.min(d.height, maxCursorSize.height)); |
| } |
| |
| // Called from native when the cursor is set |
| CImage fCImage; |
| long getImageData() { |
| if (fCImage != null) { |
| return fCImage.ptr; |
| } |
| |
| try { |
| fCImage = CImage.getCreator().createFromImage(fImage); |
| if (fCImage == null) { |
| // Something unexpected happened: CCustomCursor constructor |
| // takes care of invalid cursor images, yet createFromImage() |
| // failed to do its job. Return null to keep the cursor unchanged. |
| return 0L; |
| } else { |
| fCImage.resizeRepresentations(fWidth, fHeight); |
| return fCImage.ptr; |
| } |
| } catch (IllegalArgumentException iae) { |
| // see comment above |
| return 0L; |
| } |
| } |
| |
| Point getHotSpot() { |
| return fHotspot; |
| } |
| } |