Mercurial > projects > dwt-mac
view dwt/graphics/Region.d @ 3:649b8e223d5a
fix extends
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 27 Aug 2008 13:48:25 +0200 |
parents | 380af2bdd8e5 |
children | 1a8b3cb347e0 |
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/******************************************************************************* * Copyright (c) 2000, 2005 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ module dwt.graphics.Region; import dwt.dwthelper.utils; import dwt.DWT; import dwt.DWTError; import dwt.DWTException; import dwt.internal.Callback; import dwt.internal.cocoa.NSAffineTransform; import dwt.internal.cocoa.NSBezierPath; import dwt.internal.cocoa.NSPoint; import dwt.internal.cocoa.NSRect; import dwt.internal.cocoa.OS; /** * Instances of this class represent areas of an x-y coordinate * system that are aggregates of the areas covered by a number * of polygons. * <p> * Application code must explicitly invoke the <code>Region.dispose()</code> * method to release the operating system resources managed by each instance * when those instances are no longer required. * </p> */ public final class Region : Resource { /** * the OS resource for the region * (Warning: This field is platform dependent) * <p> * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT * public API. It is marked public only so that it can be shared * within the packages provided by DWT. It is not available on all * platforms and should never be accessed from application code. * </p> */ public int handle; /** * Constructs a new empty region. * * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle could not be obtained for region creation</li> * </ul> */ public Region() { this(null); } /** * Constructs a new empty region. * <p> * You must dispose the region when it is no longer required. * </p> * * @param device the device on which to allocate the region * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle could not be obtained for region creation</li> * </ul> * * @see #dispose * * @since 3.0 */ public Region(Device device) { super(device); handle = OS.NewRgn(); if (handle is 0) DWT.error(DWT.ERROR_NO_HANDLES); init(); } Region(Device device, int handle) { super(device); this.handle = handle; } /** * Adds the given polygon to the collection of polygons * the receiver maintains to describe its area. * * @param pointArray points that describe the polygon to merge with the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.0 * */ public void add (int[] pointArray) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); add(pointArray, pointArray.length); } void add(int[] pointArray, int count) { if (count <= 2) return; int polyRgn = OS.NewRgn(); OS.OpenRgn(); OS.MoveTo((short)pointArray[0], (short)pointArray[1]); for (int i = 1; i < count / 2; i++) { OS.LineTo((short)pointArray[2 * i], (short)pointArray[2 * i + 1]); } OS.LineTo((short)pointArray[0], (short)pointArray[1]); OS.CloseRgn(polyRgn); OS.UnionRgn(handle, polyRgn, handle); OS.DisposeRgn(polyRgn); } /** * Adds the given rectangle to the collection of polygons * the receiver maintains to describe its area. * * @param rect the rectangle to merge with the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void add(Rectangle rect) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (rect.width < 0 || rect.height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); add (rect.x, rect.y, rect.width, rect.height); } /** * Adds the given rectangle to the collection of polygons * the receiver maintains to describe its area. * * @param x the x coordinate of the rectangle * @param y the y coordinate of the rectangle * @param width the width coordinate of the rectangle * @param height the height coordinate of the rectangle * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void add(int x, int y, int width, int height) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (width < 0 || height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); int rectRgn = OS.NewRgn(); short[] r = new short[4]; OS.SetRect(r, (short)x, (short)y, (short)(x + width),(short)(y + height)); OS.RectRgn(rectRgn, r); OS.UnionRgn(handle, rectRgn, handle); OS.DisposeRgn(rectRgn); } /** * Adds all of the polygons which make up the area covered * by the argument to the collection of polygons the receiver * maintains to describe its area. * * @param region the region to merge * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void add(Region region) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (region is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); OS.UnionRgn(handle, region.handle, handle); } /** * Returns <code>true</code> if the point specified by the * arguments is inside the area specified by the receiver, * and <code>false</code> otherwise. * * @param x the x coordinate of the point to test for containment * @param y the y coordinate of the point to test for containment * @return <code>true</code> if the region contains the point and <code>false</code> otherwise * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public bool contains(int x, int y) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); short[] point = new short[]{(short)x, (short)y}; return OS.PtInRgn(point, handle); } /** * Returns <code>true</code> if the given point is inside the * area specified by the receiver, and <code>false</code> * otherwise. * * @param pt the point to test for containment * @return <code>true</code> if the region contains the point and <code>false</code> otherwise * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public bool contains(Point pt) { if (pt is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); return contains(pt.x, pt.y); } NSAffineTransform transform; void convertRgn(NSAffineTransform transform) { int newRgn = OS.NewRgn(); Callback callback = new Callback(this, "convertRgn", 4); int proc = callback.getAddress(); if (proc is 0) DWT.error(DWT.ERROR_NO_MORE_CALLBACKS); this.transform = transform; OS.QDRegionToRects(handle, OS.kQDParseRegionFromTopLeft, proc, newRgn); this.transform = null; callback.dispose(); OS.CopyRgn(newRgn, handle); OS.DisposeRgn(newRgn); } int convertRgn(int message, int rgn, int r, int newRgn) { if (message is OS.kQDRegionToRectsMsgParse) { short[] rect = new short[4]; OS.memmove(rect, r, rect.length * 2); NSPoint point = new NSPoint(); int polyRgn = OS.NewRgn(); OS.OpenRgn(); point.x = rect[1]; point.y = rect[0]; point = transform.transformPoint(point); short startX, startY; OS.MoveTo(startX = (short)point.x, startY = (short)point.y); point.x = rect[3]; point.y = rect[0]; point = transform.transformPoint(point); OS.LineTo((short)Math.round(point.x), (short)point.y); point.x = rect[3]; point.y = rect[2]; point = transform.transformPoint(point); OS.LineTo((short)Math.round(point.x), (short)Math.round(point.y)); point.x = rect[1]; point.y = rect[2]; point = transform.transformPoint(point); OS.LineTo((short)point.x, (short)Math.round(point.y)); OS.LineTo(startX, startY); OS.CloseRgn(polyRgn); OS.UnionRgn(newRgn, polyRgn, newRgn); OS.DisposeRgn(polyRgn); } return 0; } void destroy() { OS.DisposeRgn(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 */ public bool equals(Object object) { if (this is object) return true; if (!(object instanceof Region)) return false; Region region = (Region)object; return handle is region.handle; } /** * Returns a rectangle which represents the rectangular * union of the collection of polygons the receiver * maintains to describe its area. * * @return a bounding rectangle for the region * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see Rectangle#union */ public Rectangle getBounds() { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); short[] bounds = new short[4]; OS.GetRegionBounds(handle, bounds); int width = bounds[3] - bounds[1]; int height = bounds[2] - bounds[0]; return new Rectangle(bounds[1], bounds[0], width, height); } NSBezierPath getPath() { Callback callback = new Callback(this, "regionToRects", 4); if (callback.getAddress() is 0) DWT.error(DWT.ERROR_NO_MORE_CALLBACKS); NSBezierPath path = NSBezierPath.bezierPath(); path.retain(); OS.QDRegionToRects(handle, OS.kQDParseRegionFromTopLeft, callback.getAddress(), path.id); callback.dispose(); if (path.isEmpty()) path.appendBezierPathWithRect(new NSRect()); return path; } NSPoint pt = new NSPoint(); short[] rect = new short[4]; int regionToRects(int message, int rgn, int r, int path) { if (message is OS.kQDRegionToRectsMsgParse) { OS.memmove(rect, r, rect.length * 2); pt.x = rect[1]; pt.y = rect[0]; OS.objc_msgSend(path, OS.sel_moveToPoint_1, pt); pt.x = rect[3]; OS.objc_msgSend(path, OS.sel_lineToPoint_1, pt); pt.x = rect[3]; pt.y = rect[2]; OS.objc_msgSend(path, OS.sel_lineToPoint_1, pt); pt.x = rect[1]; OS.objc_msgSend(path, OS.sel_lineToPoint_1, pt); OS.objc_msgSend(path, OS.sel_closePath); } return 0; } public static Region carbon_new(Device device, int handle) { return new Region(device, handle); } /** * 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 */ public int hashCode() { return handle; } /** * Intersects the given rectangle to the collection of polygons * the receiver maintains to describe its area. * * @param rect the rectangle to intersect with the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.0 */ public void intersect(Rectangle rect) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); intersect (rect.x, rect.y, rect.width, rect.height); } /** * Intersects the given rectangle to the collection of polygons * the receiver maintains to describe its area. * * @param x the x coordinate of the rectangle * @param y the y coordinate of the rectangle * @param width the width coordinate of the rectangle * @param height the height coordinate of the rectangle * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void intersect(int x, int y, int width, int height) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (width < 0 || height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); int rectRgn = OS.NewRgn(); short[] r = new short[4]; OS.SetRect(r, (short)x, (short)y, (short)(x + width),(short)(y + height)); OS.RectRgn(rectRgn, r); OS.SectRgn(handle, rectRgn, handle); OS.DisposeRgn(rectRgn); } /** * Intersects all of the polygons which make up the area covered * by the argument to the collection of polygons the receiver * maintains to describe its area. * * @param region the region to intersect * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.0 */ public void intersect(Region region) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (region is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); OS.SectRgn(handle, region.handle, handle); } /** * Returns <code>true</code> if the rectangle described by the * arguments intersects with any of the polygons the receiver * maintains to describe its area, and <code>false</code> otherwise. * * @param x the x coordinate of the origin of the rectangle * @param y the y coordinate of the origin of the rectangle * @param width the width of the rectangle * @param height the height of the rectangle * @return <code>true</code> if the rectangle intersects with the receiver, and <code>false</code> otherwise * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see Rectangle#intersects(Rectangle) */ public bool intersects (int x, int y, int width, int height) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); short[] r = new short[4]; OS.SetRect(r, (short)x, (short)y, (short)(x + width),(short)(y + height)); return OS.RectInRgn(rect, handle); } /** * Returns <code>true</code> if the given rectangle intersects * with any of the polygons the receiver maintains to describe * its area and <code>false</code> otherwise. * * @param rect the rectangle to test for intersection * @return <code>true</code> if the rectangle intersects with the receiver, and <code>false</code> otherwise * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see Rectangle#intersects(Rectangle) */ public bool intersects(Rectangle rect) { if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); return intersects(rect.x, rect.y, rect.width, rect.height); } /** * Returns <code>true</code> if the region has been disposed, * and <code>false</code> otherwise. * <p> * This method gets the dispose state for the region. * When a region has been disposed, it is an error to * invoke any other method using the region. * * @return <code>true</code> when the region is disposed, and <code>false</code> otherwise */ public bool isDisposed() { return handle is 0; } /** * Returns <code>true</code> if the receiver does not cover any * area in the (x, y) coordinate plane, and <code>false</code> if * the receiver does cover some area in the plane. * * @return <code>true</code> if the receiver is empty, and <code>false</code> otherwise * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public bool isEmpty() { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); return OS.EmptyRgn(handle); } /** * Subtracts the given polygon from the collection of polygons * the receiver maintains to describe its area. * * @param pointArray points that describe the polygon to merge with the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.0 */ public void subtract (int[] pointArray) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (pointArray.length < 2) return; int polyRgn = OS.NewRgn(); OS.OpenRgn(); OS.MoveTo((short)pointArray[0], (short)pointArray[1]); for (int i = 1; i < pointArray.length / 2; i++) { OS.LineTo((short)pointArray[2 * i], (short)pointArray[2 * i + 1]); } OS.LineTo((short)pointArray[0], (short)pointArray[1]); OS.CloseRgn(polyRgn); OS.DiffRgn(handle, polyRgn, handle); OS.DisposeRgn(polyRgn); } /** * Subtracts the given rectangle from the collection of polygons * the receiver maintains to describe its area. * * @param rect the rectangle to subtract from the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.0 */ public void subtract(Rectangle rect) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); subtract (rect.x, rect.y, rect.width, rect.height); } /** * Subtracts the given rectangle from the collection of polygons * the receiver maintains to describe its area. * * @param x the x coordinate of the rectangle * @param y the y coordinate of the rectangle * @param width the width coordinate of the rectangle * @param height the height coordinate of the rectangle * * @exception IllegalArgumentException <ul> * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void subtract(int x, int y, int width, int height) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (width < 0 || height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); int rectRgn = OS.NewRgn(); short[] r = new short[4]; OS.SetRect(r, (short)x, (short)y, (short)(x + width),(short)(y + height)); OS.RectRgn(rectRgn, r); OS.DiffRgn(handle, rectRgn, handle); OS.DisposeRgn(rectRgn); } /** * Subtracts all of the polygons which make up the area covered * by the argument from the collection of polygons the receiver * maintains to describe its area. * * @param region the region to subtract * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.0 */ public void subtract(Region region) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (region is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); OS.DiffRgn(handle, region.handle, handle); } /** * Translate all of the polygons the receiver maintains to describe * its area by the specified point. * * @param x the x coordinate of the point to translate * @param y the y coordinate of the point to translate * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void translate (int x, int y) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); OS.OffsetRgn (handle, (short)x, (short)y); } /** * Translate all of the polygons the receiver maintains to describe * its area by the specified point. * * @param pt the point to translate * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @since 3.1 */ public void translate (Point pt) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (pt is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); translate (pt.x, pt.y); } /** * Returns a string containing a concise, human-readable * description of the receiver. * * @return a string representation of the receiver */ public String toString () { if (isDisposed()) return "Region {*DISPOSED*}"; return "Region {" + handle + "}"; } }