bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Cursor.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2018 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.graphics;


 import org.eclipse.swt.*;
 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.gtk.*;

 /**
  * Instances of this class manage operating system resources that
  * specify the appearance of the on-screen pointer. To create a
  * cursor you specify the device and either a simple cursor style
  * describing one of the standard operating system provided cursors
  * or the image and mask data for the desired appearance.
  * <p>
  * Application code must explicitly invoke the <code>Cursor.dispose()</code>
  * method to release the operating system resources managed by each instance
  * when those instances are no longer required.
  * </p>
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>
  *   CURSOR_ARROW, CURSOR_WAIT, CURSOR_CROSS, CURSOR_APPSTARTING, CURSOR_HELP,
  *   CURSOR_SIZEALL, CURSOR_SIZENESW, CURSOR_SIZENS, CURSOR_SIZENWSE, CURSOR_SIZEWE,
  *   CURSOR_SIZEN, CURSOR_SIZES, CURSOR_SIZEE, CURSOR_SIZEW, CURSOR_SIZENE, CURSOR_SIZESE,
  *   CURSOR_SIZESW, CURSOR_SIZENW, CURSOR_UPARROW, CURSOR_IBEAM, CURSOR_NO, CURSOR_HAND
  * </dd>
  * </dl>
  * <p>
  * Note: Only one of the above styles may be specified.
  * </p>
  *
  * @see <a href="http://www.eclipse.org/swt/snippets/#cursor">Cursor snippets</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  */
 public final class Cursor extends Resource {
 	/**
 	 * the handle to the OS cursor resource
 	 * (Warning: This field is platform dependent)
 	 * <p>
 	 * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
 	 * public API. It is marked public only so that it can be shared
 	 * within the packages provided by SWT. It is not available on all
 	 * platforms and should never be accessed from application code.
 	 * </p>
 	 *
 	 * @noreference This field is not intended to be referenced by clients.
 	 */
 	public long handle;

 Cursor (Device device) {
 	super(device);
 }

 /**
  * Constructs a new cursor given a device and a style
  * constant describing the desired cursor appearance.
  * <p>
  * You must dispose the cursor when it is no longer required.
  * </p>
  * NOTE:
  * It is recommended to use {@link org.eclipse.swt.widgets.Display#getSystemCursor(int)}
  * instead of using this constructor. This way you can avoid the
  * overhead of disposing the Cursor resource.
  *
  * @param device the device on which to allocate the cursor
  * @param style the style of cursor to allocate
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_INVALID_ARGUMENT - when an unknown style is specified</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
  * </ul>
  *
  * @see SWT#CURSOR_ARROW
  * @see SWT#CURSOR_WAIT
  * @see SWT#CURSOR_CROSS
  * @see SWT#CURSOR_APPSTARTING
  * @see SWT#CURSOR_HELP
  * @see SWT#CURSOR_SIZEALL
  * @see SWT#CURSOR_SIZENESW
  * @see SWT#CURSOR_SIZENS
  * @see SWT#CURSOR_SIZENWSE
  * @see SWT#CURSOR_SIZEWE
  * @see SWT#CURSOR_SIZEN
  * @see SWT#CURSOR_SIZES
  * @see SWT#CURSOR_SIZEE
  * @see SWT#CURSOR_SIZEW
  * @see SWT#CURSOR_SIZENE
  * @see SWT#CURSOR_SIZESE
  * @see SWT#CURSOR_SIZESW
  * @see SWT#CURSOR_SIZENW
  * @see SWT#CURSOR_UPARROW
  * @see SWT#CURSOR_IBEAM
  * @see SWT#CURSOR_NO
  * @see SWT#CURSOR_HAND
  * @see #dispose()
  */
 public Cursor(Device device, int style) {
 	super(device);
 	String name1 = null, name2 = null;
 	switch (style) {
 		case SWT.CURSOR_APPSTARTING:	name1 = "left_ptr_watch"; break;
 		case SWT.CURSOR_ARROW:			name1 = "left_ptr"; break;
 		case SWT.CURSOR_WAIT:			name1 = "watch"; break;
 		case SWT.CURSOR_CROSS:			name1 = "crosshair"; break;
 		case SWT.CURSOR_HAND:			name1 = "hand2"; break;
 		case SWT.CURSOR_HELP:			name1 = "question_arrow"; break;
 		case SWT.CURSOR_SIZEALL:		name1 = "fleur"; break;
 		case SWT.CURSOR_SIZENESW:		name1 = "size_bdiag"; break;
 		case SWT.CURSOR_SIZENS:			name1 = "sb_v_double_arrow"; break;
 		case SWT.CURSOR_SIZENWSE:		name1 = "size_fdiag"; break;
 		case SWT.CURSOR_SIZEWE:			name1 = "sb_h_double_arrow"; break;
 		case SWT.CURSOR_SIZEN:			name1 = "top_side"; break;
 		case SWT.CURSOR_SIZES:			name1 = "bottom_side"; break;
 		case SWT.CURSOR_SIZEE:			name1 = "right_side"; break;
 		case SWT.CURSOR_SIZEW:			name1 = "left_side"; break;
 		case SWT.CURSOR_SIZENE:			name1 = "top_right_corner"; break;
 		case SWT.CURSOR_SIZESE:			name1 = "bottom_right_corner"; break;
 		case SWT.CURSOR_SIZESW:			name1 = "bottom_left_corner"; break;
 		case SWT.CURSOR_SIZENW:			name1 = "top_left_corner"; break;
 		case SWT.CURSOR_UPARROW:		name1 = "sb_up_arrow"; name2 = "up-arrow"; break;
 		case SWT.CURSOR_IBEAM:			name1 = "xterm"; break;
 		case SWT.CURSOR_NO:				name1 = "crossed_circle"; name2 = "not-allowed"; break;
 		default:
 			SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	for (String name : new String[] { name1, name2, "left_ptr", "default" }) {
 		if (name == null) continue;
 		if (GTK.GTK4) {
 			handle = GDK.gdk_cursor_new_from_name (name, 0);
 		} else {
 			handle = GDK.gdk_cursor_new_from_name (GDK.gdk_display_get_default(), name);
 		}
 		if (handle != 0) break;
 	}
 	if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	init();
 }

 /**
  * Constructs a new cursor given a device, image and mask
  * data describing the desired cursor appearance, and the x
  * and y coordinates of the <em>hotspot</em> (that is, the point
  * within the area covered by the cursor which is considered
  * to be where the on-screen pointer is "pointing").
  * <p>
  * The mask data is allowed to be null, but in this case the source
  * must be an ImageData representing an icon that specifies both
  * color data and mask data.
  * <p>
  * You must dispose the cursor when it is no longer required.
  * </p>
  *
  * @param device the device on which to allocate the cursor
  * @param source the color data for the cursor
  * @param mask the mask data for the cursor (or null)
  * @param hotspotX the x coordinate of the cursor's hotspot
  * @param hotspotY the y coordinate of the cursor's hotspot
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_NULL_ARGUMENT - if the source is null</li>
  *    <li>ERROR_NULL_ARGUMENT - if the mask is null and the source does not have a mask</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the source and the mask are not the same
  *          size, or if the hotspot is outside the bounds of the image</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
  * </ul>
  *
  * @see #dispose()
  */
 public Cursor(Device device, ImageData source, ImageData mask, int hotspotX, int hotspotY) {
 	super(device);
 	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (mask == null) {
 		if (!(source.getTransparencyType() == SWT.TRANSPARENCY_MASK)) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 		mask = source.getTransparencyMask();
 	}
 	/* Check the bounds. Mask must be the same size as source */
 	if (mask.width != source.width || mask.height != source.height) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	/* Check the hotspots */
 	if (hotspotX >= source.width || hotspotX < 0 ||
 		hotspotY >= source.height || hotspotY < 0) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	/* Convert depth to 1 */
 	source = ImageData.convertMask(source);
 	mask = ImageData.convertMask(mask);

 	/* Swap the bits in each byte and convert to appropriate scanline pad */
 	byte[] sourceData = new byte[source.data.length];
 	byte[] maskData = new byte[mask.data.length];
 	byte[] data = source.data;
 	for (int i = 0; i < data.length; i++) {
 		byte s = data[i];
 		sourceData[i] = (byte)(((s & 0x80) >> 7) |
 			((s & 0x40) >> 5) |
 			((s & 0x20) >> 3) |
 			((s & 0x10) >> 1) |
 			((s & 0x08) << 1) |
 			((s & 0x04) << 3) |
 			((s & 0x02) << 5) |
 			((s & 0x01) << 7));
 		sourceData[i] = (byte) ~sourceData[i];
 	}
 	sourceData = ImageData.convertPad(sourceData, source.width, source.height, source.depth, source.scanlinePad, 1);
 	data = mask.data;
 	for (int i = 0; i < data.length; i++) {
 		byte s = data[i];
 		maskData[i] = (byte)(((s & 0x80) >> 7) |
 			((s & 0x40) >> 5) |
 			((s & 0x20) >> 3) |
 			((s & 0x10) >> 1) |
 			((s & 0x08) << 1) |
 			((s & 0x04) << 3) |
 			((s & 0x02) << 5) |
 			((s & 0x01) << 7));
 		maskData[i] = (byte) ~maskData[i];
 	}
 	maskData = ImageData.convertPad(maskData, mask.width, mask.height, mask.depth, mask.scanlinePad, 1);
 	handle = createCursor(maskData, sourceData, source.width, source.height, hotspotX, hotspotY, true);
 	if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	init();
 }

 /**
  * Constructs a new cursor given a device, image data describing
  * the desired cursor appearance, and the x and y coordinates of
  * the <em>hotspot</em> (that is, the point within the area
  * covered by the cursor which is considered to be where the
  * on-screen pointer is "pointing").
  * <p>
  * You must dispose the cursor when it is no longer required.
  * </p>
  *
  * @param device the device on which to allocate the cursor
  * @param source the image data for the cursor
  * @param hotspotX the x coordinate of the cursor's hotspot
  * @param hotspotY the y coordinate of the cursor's hotspot
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_NULL_ARGUMENT - if the image is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the hotspot is outside the bounds of the
  * 		 image</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
  * </ul>
  *
  * @see #dispose()
  *
  * @since 3.0
  */
 public Cursor(Device device, ImageData source, int hotspotX, int hotspotY) {
 	super(device);
 	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (hotspotX >= source.width || hotspotX < 0 ||
 		hotspotY >= source.height || hotspotY < 0) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}

 	long display = GDK.gdk_display_get_default();
 	boolean supportsColorCursor = GTK.GTK4 || GDK.gdk_display_supports_cursor_color(display);
 	if (supportsColorCursor) {
 		int width = source.width;
 		int height = source.height;
 		PaletteData palette = source.palette;
 		long pixbuf = GDK.gdk_pixbuf_new(GDK.GDK_COLORSPACE_RGB, true, 8, width, height);
 		if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 		int stride = GDK.gdk_pixbuf_get_rowstride(pixbuf);
 		long data = GDK.gdk_pixbuf_get_pixels(pixbuf);
 		byte[] buffer = source.data;
 		if (!palette.isDirect || source.depth != 24 || stride != source.bytesPerLine || palette.redMask != 0xFF000000 || palette.greenMask != 0xFF0000 || palette.blueMask != 0xFF00) {
 			buffer = new byte[source.width * source.height * 4];
 			if (palette.isDirect) {
 				ImageData.blit(ImageData.BLIT_SRC,
 					source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, palette.redMask, palette.greenMask, palette.blueMask,
 					ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
 					buffer, 32, source.width * 4, ImageData.MSB_FIRST, 0, 0, source.width, source.height, 0xFF000000, 0xFF0000, 0xFF00,
 					false, false);
 			} else {
 				RGB[] rgbs = palette.getRGBs();
 				int length = rgbs.length;
 				byte[] srcReds = new byte[length];
 				byte[] srcGreens = new byte[length];
 				byte[] srcBlues = new byte[length];
 				for (int i = 0; i < rgbs.length; i++) {
 					RGB rgb = rgbs[i];
 					if (rgb == null) continue;
 					srcReds[i] = (byte)rgb.red;
 					srcGreens[i] = (byte)rgb.green;
 					srcBlues[i] = (byte)rgb.blue;
 				}
 				ImageData.blit(ImageData.BLIT_SRC,
 					source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, srcReds, srcGreens, srcBlues,
 					ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
 					buffer, 32, source.width * 4, ImageData.MSB_FIRST, 0, 0, source.width, source.height, 0xFF000000, 0xFF0000, 0xFF00,
 					false, false);
 			}
 			if (source.maskData != null || source.transparentPixel != -1) {
 				ImageData mask = source.getTransparencyMask();
 				byte[] maskData = mask.data;
 				int maskBpl = mask.bytesPerLine;
 				int offset = 3, maskOffset = 0;
 				for (int y = 0; y<source.height; y++) {
 					for (int x = 0; x<source.width; x++) {
 						buffer[offset] = ((maskData[maskOffset + (x >> 3)]) & (1 << (7 - (x & 0x7)))) != 0 ? (byte)0xff : 0;
 						offset += 4;
 					}
 					maskOffset += maskBpl;
 				}
 			} else if (source.alpha != -1) {
 				byte alpha = (byte)source.alpha;
 				for (int i=3; i<buffer.length; i+=4) {
 					buffer[i] = alpha;
 				}
 			} else if (source.alphaData != null) {
 				byte[] alphaData = source.alphaData;
 				for (int i=3; i<buffer.length; i+=4) {
 					buffer[i] = alphaData[i/4];
 				}
 			} else {
 				for (int i=3; i<buffer.length; i+=4) {
 					buffer[i] = -1;
 				}
 			}
 		}
 		C.memmove(data, buffer, stride * height);

 		if (GTK.GTK4) {
 			long texture = GDK.gdk_texture_new_for_pixbuf(pixbuf);
 			handle = GDK.gdk_cursor_new_from_texture(texture, hotspotX, hotspotY, 0);
 			OS.g_object_unref(texture);
 		} else {
 			handle = GDK.gdk_cursor_new_from_pixbuf(display, pixbuf, hotspotX, hotspotY);
 		}
 		OS.g_object_unref(pixbuf);
 	} else {

 		ImageData mask = source.getTransparencyMask();

 		/* Ensure depth is equal to 1 */
 		if (source.depth > 1) {
 			/* Create a destination image with no data */
 			ImageData newSource = new ImageData(
 				source.width, source.height, 1, ImageData.bwPalette(),
 				1, null, 0, null, null, -1, -1, 0, 0, 0, 0, 0);

 			byte[] newReds = new byte[]{0, (byte)255}, newGreens = newReds, newBlues = newReds;

 			/* Convert the source to a black and white image of depth 1 */
 			PaletteData palette = source.palette;
 			if (palette.isDirect) {
 				ImageData.blit(ImageData.BLIT_SRC,
 						source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, palette.redMask, palette.greenMask, palette.blueMask,
 						ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
 						newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
 						false, false);
 			} else {
 				RGB[] rgbs = palette.getRGBs();
 				int length = rgbs.length;
 				byte[] srcReds = new byte[length];
 				byte[] srcGreens = new byte[length];
 				byte[] srcBlues = new byte[length];
 				for (int i = 0; i < rgbs.length; i++) {
 					RGB rgb = rgbs[i];
 					if (rgb == null) continue;
 					srcReds[i] = (byte)rgb.red;
 					srcGreens[i] = (byte)rgb.green;
 					srcBlues[i] = (byte)rgb.blue;
 				}
 				ImageData.blit(ImageData.BLIT_SRC,
 						source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, srcReds, srcGreens, srcBlues,
 						ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
 						newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
 						false, false);
 			}
 			source = newSource;
 		}

 		/* Swap the bits in each byte and convert to appropriate scanline pad */
 		byte[] sourceData = new byte[source.data.length];
 		byte[] maskData = new byte[mask.data.length];
 		byte[] data = source.data;
 		for (int i = 0; i < data.length; i++) {
 			byte s = data[i];
 			sourceData[i] = (byte)(((s & 0x80) >> 7) |
 				((s & 0x40) >> 5) |
 				((s & 0x20) >> 3) |
 				((s & 0x10) >> 1) |
 				((s & 0x08) << 1) |
 				((s & 0x04) << 3) |
 				((s & 0x02) << 5) |
 				((s & 0x01) << 7));
 		}
 		sourceData = ImageData.convertPad(sourceData, source.width, source.height, source.depth, source.scanlinePad, 1);
 		data = mask.data;
 		for (int i = 0; i < data.length; i++) {
 			byte s = data[i];
 			maskData[i] = (byte)(((s & 0x80) >> 7) |
 				((s & 0x40) >> 5) |
 				((s & 0x20) >> 3) |
 				((s & 0x10) >> 1) |
 				((s & 0x08) << 1) |
 				((s & 0x04) << 3) |
 				((s & 0x02) << 5) |
 				((s & 0x01) << 7));
 		}
 		maskData = ImageData.convertPad(maskData, mask.width, mask.height, mask.depth, mask.scanlinePad, 1);
 		handle = createCursor(sourceData, maskData, source.width, source.height, hotspotX, hotspotY, false);
 	}
 	if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	init();
 }

 long createCursor(byte[] sourceData, byte[] maskData, int width, int height, int hotspotX, int hotspotY, boolean reverse) {
 	for (int i = 0; i < sourceData.length; i++) {
 		byte s = sourceData[i];
 		sourceData[i] = (byte)(((s & 0x80) >> 7) |
 			((s & 0x40) >> 5) |
 			((s & 0x20) >> 3) |
 			((s & 0x10) >> 1) |
 			((s & 0x08) << 1) |
 			((s & 0x04) << 3) |
 			((s & 0x02) << 5) |
 			((s & 0x01) << 7));
 		sourceData[i] = (byte) ~sourceData[i];
 	}
 	for (int i = 0; i < maskData.length; i++) {
 		byte s = maskData[i];
 		maskData[i] = (byte)(((s & 0x80) >> 7) |
 			((s & 0x40) >> 5) |
 			((s & 0x20) >> 3) |
 			((s & 0x10) >> 1) |
 			((s & 0x08) << 1) |
 			((s & 0x04) << 3) |
 			((s & 0x02) << 5) |
 			((s & 0x01) << 7));
 		maskData[i] = (byte) ~maskData[i];
 	}
 	PaletteData palette = new PaletteData(new RGB(0, 0, 0), new RGB(255, 255, 255));
 	ImageData source = new ImageData(width, height, 1, palette, 1, sourceData);
 	ImageData mask = new ImageData(width, height, 1, palette, 1, maskData);
 	byte[] data = new byte[source.width * source.height * 4];
 	for (int y = 0; y < source.height; y++) {
 		int offset = y * source.width * 4;
 		for (int x = 0; x < source.width; x++) {
 			int pixel = source.getPixel(x, y);
 			int maskPixel = mask.getPixel(x, y);
 			if (pixel == 0 && maskPixel == 0) {
 				// BLACK
 				data[offset+3] = (byte)0xFF;
 			} else if (pixel == 0 && maskPixel == 1) {
 				// WHITE - cursor color
 				data[offset] = data[offset + 1] = data[offset + 2] = data[offset + 3] = (byte)0xFF;
 			} else if (pixel == 1 && maskPixel == 0) {
 				// SCREEN
 			} else {
 				/* no support */
 				// REVERSE SCREEN -> SCREEN
 			}
 			offset += 4;
 		}
 	}
 	long pixbuf = GDK.gdk_pixbuf_new(GDK.GDK_COLORSPACE_RGB, true, 8, width, height);
 	if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	int stride = GDK.gdk_pixbuf_get_rowstride(pixbuf);
 	long pixels = GDK.gdk_pixbuf_get_pixels(pixbuf);
 	C.memmove(pixels, data, stride * height);

 	long cursor;
 	if (GTK.GTK4) {
 		long texture = GDK.gdk_texture_new_for_pixbuf(pixbuf);
 		cursor = GDK.gdk_cursor_new_from_texture(texture, hotspotX, hotspotY, 0);
 		OS.g_object_unref(texture);
 	} else {
 		cursor = GDK.gdk_cursor_new_from_pixbuf(GDK.gdk_display_get_default(), pixbuf, hotspotX, hotspotY);
 	}
 	OS.g_object_unref(pixbuf);

 	return cursor;
 }

 @Override
 void destroy() {
 	OS.g_object_unref(handle);
 	handle = 0;
 }

 /**
  * Compares the argument to the receiver, and returns true
  * if they represent the <em>same</em> object using a class
  * specific comparison.
  *
  * @param object the object to compare with this object
  * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
  *
  * @see #hashCode
  */
 @Override
 public boolean equals(Object object) {
 	if (object == this) return true;
 	if (!(object instanceof Cursor)) return false;
 	Cursor cursor = (Cursor) object;
 	return device == cursor.device && handle == cursor.handle;
 }

 /**
  * Invokes platform specific functionality to allocate a new cursor.
  * <p>
  * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
  * API for <code>Cursor</code>. It is marked public only so that it
  * can be shared within the packages provided by SWT. It is not
  * available on all platforms, and should never be called from
  * application code.
  * </p>
  *
  * @param device the device on which to allocate the color
  * @param handle the handle for the cursor
  *
  * @noreference This method is not intended to be referenced by clients.
  */
 public static Cursor gtk_new(Device device, long handle) {
 	Cursor cursor = new Cursor(device);
 	cursor.handle = handle;
 	return cursor;
 }

 /**
  * Returns an integer hash code for the receiver. Any two
  * objects that return <code>true</code> when passed to
  * <code>equals</code> must return the same value for this
  * method.
  *
  * @return the receiver's hash
  *
  * @see #equals
  */
 @Override
 public int hashCode() {
 	return (int)handle;
 }

 /**
  * Returns <code>true</code> if the cursor has been disposed,
  * and <code>false</code> otherwise.
  * <p>
  * This method gets the dispose state for the cursor.
  * When a cursor has been disposed, it is an error to
  * invoke any other method (except {@link #dispose()}) using the cursor.
  *
  * @return <code>true</code> when the cursor is disposed and <code>false</code> otherwise
  */
 @Override
 public boolean isDisposed() {
 	return handle == 0;
 }

 /**
  * Returns a string containing a concise, human-readable
  * description of the receiver.
  *
  * @return a string representation of the receiver
  */
 @Override
 public String toString () {
 	if (isDisposed()) return "Cursor {*DISPOSED*}";
 	return "Cursor {" + handle + "}";
 }

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2018 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.graphics;


	import org.eclipse.swt.*;
	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.gtk.*;

	/**
	* Instances of this class manage operating system resources that
	* specify the appearance of the on-screen pointer. To create a
	* cursor you specify the device and either a simple cursor style
	* describing one of the standard operating system provided cursors
	* or the image and mask data for the desired appearance.
	* <p>
	* Application code must explicitly invoke the <code>Cursor.dispose()</code>
	* method to release the operating system resources managed by each instance
	* when those instances are no longer required.
	* </p>
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>
	* CURSOR_ARROW, CURSOR_WAIT, CURSOR_CROSS, CURSOR_APPSTARTING, CURSOR_HELP,
	* CURSOR_SIZEALL, CURSOR_SIZENESW, CURSOR_SIZENS, CURSOR_SIZENWSE, CURSOR_SIZEWE,
	* CURSOR_SIZEN, CURSOR_SIZES, CURSOR_SIZEE, CURSOR_SIZEW, CURSOR_SIZENE, CURSOR_SIZESE,
	* CURSOR_SIZESW, CURSOR_SIZENW, CURSOR_UPARROW, CURSOR_IBEAM, CURSOR_NO, CURSOR_HAND
	* </dd>
	* </dl>
	* <p>
	* Note: Only one of the above styles may be specified.
	* </p>
	*
	* @see <a href="http://www.eclipse.org/swt/snippets/#cursor">Cursor snippets</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	*/
	public final class Cursor extends Resource {
	/**
	* the handle to the OS cursor resource
	* (Warning: This field is platform dependent)
	* <p>
	* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
	* public API. It is marked public only so that it can be shared
	* within the packages provided by SWT. It is not available on all
	* platforms and should never be accessed from application code.
	* </p>
	*
	* @noreference This field is not intended to be referenced by clients.
	*/
	public long handle;

	Cursor (Device device) {
	super(device);
	}

	/**
	* Constructs a new cursor given a device and a style
	* constant describing the desired cursor appearance.
	* <p>
	* You must dispose the cursor when it is no longer required.
	* </p>
	* NOTE:
	* It is recommended to use {@link org.eclipse.swt.widgets.Display#getSystemCursor(int)}
	* instead of using this constructor. This way you can avoid the
	* overhead of disposing the Cursor resource.
	*
	* @param device the device on which to allocate the cursor
	* @param style the style of cursor to allocate
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_INVALID_ARGUMENT - when an unknown style is specified</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
	* </ul>
	*
	* @see SWT#CURSOR_ARROW
	* @see SWT#CURSOR_WAIT
	* @see SWT#CURSOR_CROSS
	* @see SWT#CURSOR_APPSTARTING
	* @see SWT#CURSOR_HELP
	* @see SWT#CURSOR_SIZEALL
	* @see SWT#CURSOR_SIZENESW
	* @see SWT#CURSOR_SIZENS
	* @see SWT#CURSOR_SIZENWSE
	* @see SWT#CURSOR_SIZEWE
	* @see SWT#CURSOR_SIZEN
	* @see SWT#CURSOR_SIZES
	* @see SWT#CURSOR_SIZEE
	* @see SWT#CURSOR_SIZEW
	* @see SWT#CURSOR_SIZENE
	* @see SWT#CURSOR_SIZESE
	* @see SWT#CURSOR_SIZESW
	* @see SWT#CURSOR_SIZENW
	* @see SWT#CURSOR_UPARROW
	* @see SWT#CURSOR_IBEAM
	* @see SWT#CURSOR_NO
	* @see SWT#CURSOR_HAND
	* @see #dispose()
	*/
	public Cursor(Device device, int style) {
	super(device);
	String name1 = null, name2 = null;
	switch (style) {
	case SWT.CURSOR_APPSTARTING: name1 = "left_ptr_watch"; break;
	case SWT.CURSOR_ARROW: name1 = "left_ptr"; break;
	case SWT.CURSOR_WAIT: name1 = "watch"; break;
	case SWT.CURSOR_CROSS: name1 = "crosshair"; break;
	case SWT.CURSOR_HAND: name1 = "hand2"; break;
	case SWT.CURSOR_HELP: name1 = "question_arrow"; break;
	case SWT.CURSOR_SIZEALL: name1 = "fleur"; break;
	case SWT.CURSOR_SIZENESW: name1 = "size_bdiag"; break;
	case SWT.CURSOR_SIZENS: name1 = "sb_v_double_arrow"; break;
	case SWT.CURSOR_SIZENWSE: name1 = "size_fdiag"; break;
	case SWT.CURSOR_SIZEWE: name1 = "sb_h_double_arrow"; break;
	case SWT.CURSOR_SIZEN: name1 = "top_side"; break;
	case SWT.CURSOR_SIZES: name1 = "bottom_side"; break;
	case SWT.CURSOR_SIZEE: name1 = "right_side"; break;
	case SWT.CURSOR_SIZEW: name1 = "left_side"; break;
	case SWT.CURSOR_SIZENE: name1 = "top_right_corner"; break;
	case SWT.CURSOR_SIZESE: name1 = "bottom_right_corner"; break;
	case SWT.CURSOR_SIZESW: name1 = "bottom_left_corner"; break;
	case SWT.CURSOR_SIZENW: name1 = "top_left_corner"; break;
	case SWT.CURSOR_UPARROW: name1 = "sb_up_arrow"; name2 = "up-arrow"; break;
	case SWT.CURSOR_IBEAM: name1 = "xterm"; break;
	case SWT.CURSOR_NO: name1 = "crossed_circle"; name2 = "not-allowed"; break;
	default:
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	for (String name : new String[] { name1, name2, "left_ptr", "default" }) {
	if (name == null) continue;
	if (GTK.GTK4) {
	handle = GDK.gdk_cursor_new_from_name (name, 0);
	} else {
	handle = GDK.gdk_cursor_new_from_name (GDK.gdk_display_get_default(), name);
	}
	if (handle != 0) break;
	}
	if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	init();
	}

	/**
	* Constructs a new cursor given a device, image and mask
	* data describing the desired cursor appearance, and the x
	* and y coordinates of the <em>hotspot</em> (that is, the point
	* within the area covered by the cursor which is considered
	* to be where the on-screen pointer is "pointing").
	* <p>
	* The mask data is allowed to be null, but in this case the source
	* must be an ImageData representing an icon that specifies both
	* color data and mask data.
	* <p>
	* You must dispose the cursor when it is no longer required.
	* </p>
	*
	* @param device the device on which to allocate the cursor
	* @param source the color data for the cursor
	* @param mask the mask data for the cursor (or null)
	* @param hotspotX the x coordinate of the cursor's hotspot
	* @param hotspotY the y coordinate of the cursor's hotspot
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_NULL_ARGUMENT - if the source is null</li>
	* <li>ERROR_NULL_ARGUMENT - if the mask is null and the source does not have a mask</li>
	* <li>ERROR_INVALID_ARGUMENT - if the source and the mask are not the same
	* size, or if the hotspot is outside the bounds of the image</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
	* </ul>
	*
	* @see #dispose()
	*/
	public Cursor(Device device, ImageData source, ImageData mask, int hotspotX, int hotspotY) {
	super(device);
	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (mask == null) {
	if (!(source.getTransparencyType() == SWT.TRANSPARENCY_MASK)) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	mask = source.getTransparencyMask();
	}
	/* Check the bounds. Mask must be the same size as source */
	if (mask.width != source.width \|\| mask.height != source.height) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	/* Check the hotspots */
	if (hotspotX >= source.width \|\| hotspotX < 0 \|\|
	hotspotY >= source.height \|\| hotspotY < 0) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	/* Convert depth to 1 */
	source = ImageData.convertMask(source);
	mask = ImageData.convertMask(mask);

	/* Swap the bits in each byte and convert to appropriate scanline pad */
	byte[] sourceData = new byte[source.data.length];
	byte[] maskData = new byte[mask.data.length];
	byte[] data = source.data;
	for (int i = 0; i < data.length; i++) {
	byte s = data[i];
	sourceData[i] = (byte)(((s & 0x80) >> 7) \|
	((s & 0x40) >> 5) \|
	((s & 0x20) >> 3) \|
	((s & 0x10) >> 1) \|
	((s & 0x08) << 1) \|
	((s & 0x04) << 3) \|
	((s & 0x02) << 5) \|
	((s & 0x01) << 7));
	sourceData[i] = (byte) ~sourceData[i];
	}
	sourceData = ImageData.convertPad(sourceData, source.width, source.height, source.depth, source.scanlinePad, 1);
	data = mask.data;
	for (int i = 0; i < data.length; i++) {
	byte s = data[i];
	maskData[i] = (byte)(((s & 0x80) >> 7) \|
	((s & 0x40) >> 5) \|
	((s & 0x20) >> 3) \|
	((s & 0x10) >> 1) \|
	((s & 0x08) << 1) \|
	((s & 0x04) << 3) \|
	((s & 0x02) << 5) \|
	((s & 0x01) << 7));
	maskData[i] = (byte) ~maskData[i];
	}
	maskData = ImageData.convertPad(maskData, mask.width, mask.height, mask.depth, mask.scanlinePad, 1);
	handle = createCursor(maskData, sourceData, source.width, source.height, hotspotX, hotspotY, true);
	if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	init();
	}

	/**
	* Constructs a new cursor given a device, image data describing
	* the desired cursor appearance, and the x and y coordinates of
	* the <em>hotspot</em> (that is, the point within the area
	* covered by the cursor which is considered to be where the
	* on-screen pointer is "pointing").
	* <p>
	* You must dispose the cursor when it is no longer required.
	* </p>
	*
	* @param device the device on which to allocate the cursor
	* @param source the image data for the cursor
	* @param hotspotX the x coordinate of the cursor's hotspot
	* @param hotspotY the y coordinate of the cursor's hotspot
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_NULL_ARGUMENT - if the image is null</li>
	* <li>ERROR_INVALID_ARGUMENT - if the hotspot is outside the bounds of the
	* image</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
	* </ul>
	*
	* @see #dispose()
	*
	* @since 3.0
	*/
	public Cursor(Device device, ImageData source, int hotspotX, int hotspotY) {
	super(device);
	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (hotspotX >= source.width \|\| hotspotX < 0 \|\|
	hotspotY >= source.height \|\| hotspotY < 0) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}

	long display = GDK.gdk_display_get_default();
	boolean supportsColorCursor = GTK.GTK4 \|\| GDK.gdk_display_supports_cursor_color(display);
	if (supportsColorCursor) {
	int width = source.width;
	int height = source.height;
	PaletteData palette = source.palette;
	long pixbuf = GDK.gdk_pixbuf_new(GDK.GDK_COLORSPACE_RGB, true, 8, width, height);
	if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	int stride = GDK.gdk_pixbuf_get_rowstride(pixbuf);
	long data = GDK.gdk_pixbuf_get_pixels(pixbuf);
	byte[] buffer = source.data;
	if (!palette.isDirect \|\| source.depth != 24 \|\| stride != source.bytesPerLine \|\| palette.redMask != 0xFF000000 \|\| palette.greenMask != 0xFF0000 \|\| palette.blueMask != 0xFF00) {
	buffer = new byte[source.width * source.height * 4];
	if (palette.isDirect) {
	ImageData.blit(ImageData.BLIT_SRC,
	source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, palette.redMask, palette.greenMask, palette.blueMask,
	ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
	buffer, 32, source.width * 4, ImageData.MSB_FIRST, 0, 0, source.width, source.height, 0xFF000000, 0xFF0000, 0xFF00,
	false, false);
	} else {
	RGB[] rgbs = palette.getRGBs();
	int length = rgbs.length;
	byte[] srcReds = new byte[length];
	byte[] srcGreens = new byte[length];
	byte[] srcBlues = new byte[length];
	for (int i = 0; i < rgbs.length; i++) {
	RGB rgb = rgbs[i];
	if (rgb == null) continue;
	srcReds[i] = (byte)rgb.red;
	srcGreens[i] = (byte)rgb.green;
	srcBlues[i] = (byte)rgb.blue;
	}
	ImageData.blit(ImageData.BLIT_SRC,
	source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, srcReds, srcGreens, srcBlues,
	ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
	buffer, 32, source.width * 4, ImageData.MSB_FIRST, 0, 0, source.width, source.height, 0xFF000000, 0xFF0000, 0xFF00,
	false, false);
	}
	if (source.maskData != null \|\| source.transparentPixel != -1) {
	ImageData mask = source.getTransparencyMask();
	byte[] maskData = mask.data;
	int maskBpl = mask.bytesPerLine;
	int offset = 3, maskOffset = 0;
	for (int y = 0; y<source.height; y++) {
	for (int x = 0; x<source.width; x++) {
	buffer[offset] = ((maskData[maskOffset + (x >> 3)]) & (1 << (7 - (x & 0x7)))) != 0 ? (byte)0xff : 0;
	offset += 4;
	}
	maskOffset += maskBpl;
	}
	} else if (source.alpha != -1) {
	byte alpha = (byte)source.alpha;
	for (int i=3; i<buffer.length; i+=4) {
	buffer[i] = alpha;
	}
	} else if (source.alphaData != null) {
	byte[] alphaData = source.alphaData;
	for (int i=3; i<buffer.length; i+=4) {
	buffer[i] = alphaData[i/4];
	}
	} else {
	for (int i=3; i<buffer.length; i+=4) {
	buffer[i] = -1;
	}
	}
	}
	C.memmove(data, buffer, stride * height);

	if (GTK.GTK4) {
	long texture = GDK.gdk_texture_new_for_pixbuf(pixbuf);
	handle = GDK.gdk_cursor_new_from_texture(texture, hotspotX, hotspotY, 0);
	OS.g_object_unref(texture);
	} else {
	handle = GDK.gdk_cursor_new_from_pixbuf(display, pixbuf, hotspotX, hotspotY);
	}
	OS.g_object_unref(pixbuf);
	} else {

	ImageData mask = source.getTransparencyMask();

	/* Ensure depth is equal to 1 */
	if (source.depth > 1) {
	/* Create a destination image with no data */
	ImageData newSource = new ImageData(
	source.width, source.height, 1, ImageData.bwPalette(),
	1, null, 0, null, null, -1, -1, 0, 0, 0, 0, 0);

	byte[] newReds = new byte[]{0, (byte)255}, newGreens = newReds, newBlues = newReds;

	/* Convert the source to a black and white image of depth 1 */
	PaletteData palette = source.palette;
	if (palette.isDirect) {
	ImageData.blit(ImageData.BLIT_SRC,
	source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, palette.redMask, palette.greenMask, palette.blueMask,
	ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
	newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
	false, false);
	} else {
	RGB[] rgbs = palette.getRGBs();
	int length = rgbs.length;
	byte[] srcReds = new byte[length];
	byte[] srcGreens = new byte[length];
	byte[] srcBlues = new byte[length];
	for (int i = 0; i < rgbs.length; i++) {
	RGB rgb = rgbs[i];
	if (rgb == null) continue;
	srcReds[i] = (byte)rgb.red;
	srcGreens[i] = (byte)rgb.green;
	srcBlues[i] = (byte)rgb.blue;
	}
	ImageData.blit(ImageData.BLIT_SRC,
	source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, srcReds, srcGreens, srcBlues,
	ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
	newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
	false, false);
	}
	source = newSource;
	}

	/* Swap the bits in each byte and convert to appropriate scanline pad */
	byte[] sourceData = new byte[source.data.length];
	byte[] maskData = new byte[mask.data.length];
	byte[] data = source.data;
	for (int i = 0; i < data.length; i++) {
	byte s = data[i];
	sourceData[i] = (byte)(((s & 0x80) >> 7) \|
	((s & 0x40) >> 5) \|
	((s & 0x20) >> 3) \|
	((s & 0x10) >> 1) \|
	((s & 0x08) << 1) \|
	((s & 0x04) << 3) \|
	((s & 0x02) << 5) \|
	((s & 0x01) << 7));
	}
	sourceData = ImageData.convertPad(sourceData, source.width, source.height, source.depth, source.scanlinePad, 1);
	data = mask.data;
	for (int i = 0; i < data.length; i++) {
	byte s = data[i];
	maskData[i] = (byte)(((s & 0x80) >> 7) \|
	((s & 0x40) >> 5) \|
	((s & 0x20) >> 3) \|
	((s & 0x10) >> 1) \|
	((s & 0x08) << 1) \|
	((s & 0x04) << 3) \|
	((s & 0x02) << 5) \|
	((s & 0x01) << 7));
	}
	maskData = ImageData.convertPad(maskData, mask.width, mask.height, mask.depth, mask.scanlinePad, 1);
	handle = createCursor(sourceData, maskData, source.width, source.height, hotspotX, hotspotY, false);
	}
	if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	init();
	}

	long createCursor(byte[] sourceData, byte[] maskData, int width, int height, int hotspotX, int hotspotY, boolean reverse) {
	for (int i = 0; i < sourceData.length; i++) {
	byte s = sourceData[i];
	sourceData[i] = (byte)(((s & 0x80) >> 7) \|
	((s & 0x40) >> 5) \|
	((s & 0x20) >> 3) \|
	((s & 0x10) >> 1) \|
	((s & 0x08) << 1) \|
	((s & 0x04) << 3) \|
	((s & 0x02) << 5) \|
	((s & 0x01) << 7));
	sourceData[i] = (byte) ~sourceData[i];
	}
	for (int i = 0; i < maskData.length; i++) {
	byte s = maskData[i];
	maskData[i] = (byte)(((s & 0x80) >> 7) \|
	((s & 0x40) >> 5) \|
	((s & 0x20) >> 3) \|
	((s & 0x10) >> 1) \|
	((s & 0x08) << 1) \|
	((s & 0x04) << 3) \|
	((s & 0x02) << 5) \|
	((s & 0x01) << 7));
	maskData[i] = (byte) ~maskData[i];
	}
	PaletteData palette = new PaletteData(new RGB(0, 0, 0), new RGB(255, 255, 255));
	ImageData source = new ImageData(width, height, 1, palette, 1, sourceData);
	ImageData mask = new ImageData(width, height, 1, palette, 1, maskData);
	byte[] data = new byte[source.width * source.height * 4];
	for (int y = 0; y < source.height; y++) {
	int offset = y * source.width * 4;
	for (int x = 0; x < source.width; x++) {
	int pixel = source.getPixel(x, y);
	int maskPixel = mask.getPixel(x, y);
	if (pixel == 0 && maskPixel == 0) {
	// BLACK
	data[offset+3] = (byte)0xFF;
	} else if (pixel == 0 && maskPixel == 1) {
	// WHITE - cursor color
	data[offset] = data[offset + 1] = data[offset + 2] = data[offset + 3] = (byte)0xFF;
	} else if (pixel == 1 && maskPixel == 0) {
	// SCREEN
	} else {
	/* no support */
	// REVERSE SCREEN -> SCREEN
	}
	offset += 4;
	}
	}
	long pixbuf = GDK.gdk_pixbuf_new(GDK.GDK_COLORSPACE_RGB, true, 8, width, height);
	if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	int stride = GDK.gdk_pixbuf_get_rowstride(pixbuf);
	long pixels = GDK.gdk_pixbuf_get_pixels(pixbuf);
	C.memmove(pixels, data, stride * height);

	long cursor;
	if (GTK.GTK4) {
	long texture = GDK.gdk_texture_new_for_pixbuf(pixbuf);
	cursor = GDK.gdk_cursor_new_from_texture(texture, hotspotX, hotspotY, 0);
	OS.g_object_unref(texture);
	} else {
	cursor = GDK.gdk_cursor_new_from_pixbuf(GDK.gdk_display_get_default(), pixbuf, hotspotX, hotspotY);
	}
	OS.g_object_unref(pixbuf);

	return cursor;
	}

	@Override
	void destroy() {
	OS.g_object_unref(handle);
	handle = 0;
	}

	/**
	* Compares the argument to the receiver, and returns true
	* if they represent the <em>same</em> object using a class
	* specific comparison.
	*
	* @param object the object to compare with this object
	* @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
	*
	* @see #hashCode
	*/
	@Override
	public boolean equals(Object object) {
	if (object == this) return true;
	if (!(object instanceof Cursor)) return false;
	Cursor cursor = (Cursor) object;
	return device == cursor.device && handle == cursor.handle;
	}

	/**
	* Invokes platform specific functionality to allocate a new cursor.
	* <p>
	* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
	* API for <code>Cursor</code>. It is marked public only so that it
	* can be shared within the packages provided by SWT. It is not
	* available on all platforms, and should never be called from
	* application code.
	* </p>
	*
	* @param device the device on which to allocate the color
	* @param handle the handle for the cursor
	*
	* @noreference This method is not intended to be referenced by clients.
	*/
	public static Cursor gtk_new(Device device, long handle) {
	Cursor cursor = new Cursor(device);
	cursor.handle = handle;
	return cursor;
	}

	/**
	* Returns an integer hash code for the receiver. Any two
	* objects that return <code>true</code> when passed to
	* <code>equals</code> must return the same value for this
	* method.
	*
	* @return the receiver's hash
	*
	* @see #equals
	*/
	@Override
	public int hashCode() {
	return (int)handle;
	}

	/**
	* Returns <code>true</code> if the cursor has been disposed,
	* and <code>false</code> otherwise.
	* <p>
	* This method gets the dispose state for the cursor.
	* When a cursor has been disposed, it is an error to
	* invoke any other method (except {@link #dispose()}) using the cursor.
	*
	* @return <code>true</code> when the cursor is disposed and <code>false</code> otherwise
	*/
	@Override
	public boolean isDisposed() {
	return handle == 0;
	}

	/**
	* Returns a string containing a concise, human-readable
	* description of the receiver.
	*
	* @return a string representation of the receiver
	*/
	@Override
	public String toString () {
	if (isDisposed()) return "Cursor {DISPOSED}";
	return "Cursor {" + handle + "}";
	}

	}