Mercurial > projects > dwt-mac
view dwt/graphics/Path.d @ 151:0ba75290f8ce
Added a bunch of missing defaults to switch statements
author | Jacob Carlborg <doob@me.com> |
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date | Wed, 10 Jun 2009 21:52:31 +0200 |
parents | 62202ce0039f |
children |
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/******************************************************************************* * Copyright (c) 2000, 2008 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 * * Port to the D programming language: * Jacob Carlborg <doob@me.com> *******************************************************************************/ module dwt.graphics.Path; import dwt.DWT; import dwt.DWTError; import dwt.DWTException; import dwt.internal.cocoa.NSAffineTransform; import dwt.internal.cocoa.NSAutoreleasePool; import dwt.internal.cocoa.NSBezierPath; import dwt.internal.cocoa.NSLayoutManager; import dwt.internal.cocoa.NSPoint; import dwt.internal.cocoa.NSRange; import dwt.internal.cocoa.NSRect; import dwt.internal.cocoa.NSSize; import dwt.internal.cocoa.NSString; import dwt.internal.cocoa.NSTextContainer; import dwt.internal.cocoa.NSTextStorage; import dwt.internal.cocoa.NSThread; import dwt.internal.cocoa.OS; import tango.text.convert.Format; import dwt.dwthelper.utils; import dwt.graphics.Device; import dwt.graphics.Font; import dwt.graphics.GC; import dwt.graphics.GCData; import dwt.graphics.PathData; import dwt.graphics.Resource; import dwt.internal.c.Carbon; import dwt.internal.cocoa.NSFont : NSGlyph; import dwt.internal.objc.cocoa.Cocoa; /** * Instances of this class represent paths through the two-dimensional * coordinate system. Paths do not have to be continuous, and can be * described using lines, rectangles, arcs, cubic or quadratic bezier curves, * glyphs, or other paths. * <p> * Application code must explicitly invoke the <code>Path.dispose()</code> * method to release the operating system resources managed by each instance * when those instances are no longer required. * </p> * <p> * This class requires the operating system's advanced graphics subsystem * which may not be available on some platforms. * </p> * * @see <a href="http://www.eclipse.org/swt/snippets/#path">Path, Pattern snippets</a> * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: GraphicsExample</a> * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> * * @since 3.1 */ public class Path : Resource { alias Resource.init_ init_; /** * the OS resource for the Path * (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 NSBezierPath handle; /** * Constructs a new empty Path. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param device the device on which to allocate the path * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li> * </ul> * @exception DWTException <ul> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> * </ul> * * @see #dispose() */ public this (Device device) { super(device); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { handle = NSBezierPath.bezierPath(); if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES); handle.retain(); handle.moveToPoint(NSPoint()); init_(); } finally { if (pool !is null) pool.release(); } } /** * Constructs a new Path that is a copy of <code>path</code>. If * <code>flatness</code> is less than or equal to zero, an unflatten * copy of the path is created. Otherwise, it specifies the maximum * error between the path and its flatten copy. Smaller numbers give * better approximation. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param device the device on which to allocate the path * @param path the path to make a copy * @param flatness the flatness value * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li> * <li>ERROR_NULL_ARGUMENT - if the path is null</li> * <li>ERROR_INVALID_ARGUMENT - if the path has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> * </ul> * * @see #dispose() * @since 3.4 */ public this (Device device, Path path, float flatness) { super(device); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (path.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); flatness = Math.max(0, flatness); if (flatness is 0) { handle = new NSBezierPath(path.handle.copy().id); } else { CGFloat defaultFlatness = NSBezierPath.defaultFlatness(); NSBezierPath.setDefaultFlatness(flatness); handle = path.handle.bezierPathByFlatteningPath(); NSBezierPath.setDefaultFlatness(defaultFlatness); } if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES); init_(); } finally { if (pool !is null) pool.release(); } } /** * Constructs a new Path with the specifed PathData. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param device the device on which to allocate the path * @param data the data for the path * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li> * <li>ERROR_NULL_ARGUMENT - if the data is null</li> * </ul> * @exception DWTException <ul> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> * </ul> * * @see #dispose() * @since 3.4 */ public this (Device device, PathData data) { this(device); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { if (data is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); init_(data); } finally { if (pool !is null) pool.release(); } } /** * Adds to the receiver a circular or elliptical arc that lies within * the specified rectangular area. * <p> * The resulting arc begins at <code>startAngle</code> and extends * for <code>arcAngle</code> degrees. * Angles are interpreted such that 0 degrees is at the 3 o'clock * position. A positive value indicates a counter-clockwise rotation * while a negative value indicates a clockwise rotation. * </p><p> * The center of the arc is the center of the rectangle whose origin * is (<code>x</code>, <code>y</code>) and whose size is specified by the * <code>width</code> and <code>height</code> arguments. * </p><p> * The resulting arc covers an area <code>width + 1</code> pixels wide * by <code>height + 1</code> pixels tall. * </p> * * @param x the x coordinate of the upper-left corner of the arc * @param y the y coordinate of the upper-left corner of the arc * @param width the width of the arc * @param height the height of the arc * @param startAngle the beginning angle * @param arcAngle the angular extent of the arc, relative to the start angle * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void addArc(float x, float y, float width, float height, float startAngle, float arcAngle) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSAffineTransform transform = NSAffineTransform.transform(); transform.translateXBy(x + width / 2f, y + height / 2f); transform.scaleXBy(width / 2f, height / 2f); NSBezierPath path = NSBezierPath.bezierPath(); NSPoint center = NSPoint(); CGFloat sAngle = -startAngle; CGFloat eAngle = -(startAngle + arcAngle); path.appendBezierPathWithArcWithCenter(center, 1, sAngle, eAngle, arcAngle>0); path.transformUsingAffineTransform(transform); handle.appendBezierPath(path); } finally { if (pool !is null) pool.release(); } } /** * Adds to the receiver the path described by the parameter. * * @param path the path to add to the receiver * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void addPath(Path path) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (path.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { handle.appendBezierPath(path.handle); } finally { if (pool !is null) pool.release(); } } /** * Adds to the receiver the rectangle specified by x, y, width and height. * * @param x the x coordinate of the rectangle to add * @param y the y coordinate of the rectangle to add * @param width the width of the rectangle to add * @param height the height of the rectangle to add * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void addRectangle(float x, float y, float width, float height) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSRect rect = NSRect(); rect.x = x; rect.y = y; rect.width = width; rect.height = height; NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { handle.appendBezierPathWithRect(rect); } finally { if (pool !is null) pool.release(); } } /** * Adds to the receiver the pattern of glyphs generated by drawing * the given string using the given font starting at the point (x, y). * * @param stri the text to use * @param x the x coordinate of the starting point * @param y the y coordinate of the starting point * @param font the font to use * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the font is null</li> * <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void addString(String stri, float x, float y, Font font) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (font is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (font.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSString str = NSString.stringWith(stri); NSTextStorage textStorage = (cast(NSTextStorage)(new NSTextStorage()).alloc()); textStorage.initWithString(str); NSLayoutManager layoutManager = cast(NSLayoutManager)(new NSLayoutManager()).alloc().init(); NSTextContainer textContainer = cast(NSTextContainer)(new NSTextContainer()).alloc(); NSSize size = NSSize(); size.width = CGFloat.max; //Float.MAX_VALUE; size.height = CGFloat.max; //Float.MAX_VALUE; textContainer.initWithContainerSize(size); textStorage.addLayoutManager(layoutManager); layoutManager.addTextContainer(textContainer); NSRange range = NSRange(); range.length = str.length(); textStorage.beginEditing(); textStorage.addAttribute(OS.NSFontAttributeName, font.handle, range); textStorage.endEditing(); range = layoutManager.glyphRangeForTextContainer(textContainer); if (range.length !is 0) { NSGlyph* glyphs = cast(NSGlyph*) OS.malloc(4 * range.length * 2); layoutManager.getGlyphs(glyphs, range); NSBezierPath path = NSBezierPath.bezierPath(); NSPoint point = NSPoint(); point.x = x; point.y = y; path.moveToPoint(point); path.appendBezierPathWithGlyphs(glyphs, range.length, font.handle); NSAffineTransform transform = NSAffineTransform.transform(); transform.scaleXBy(1, -1); transform.translateXBy(0, -((2*y) + textStorage.size().height)); path.transformUsingAffineTransform(transform); OS.free(glyphs); handle.appendBezierPath(path); } textContainer.release(); layoutManager.release(); textStorage.release(); } finally { if (pool !is null) pool.release(); } } /** * Closes the current sub path by adding to the receiver a line * from the current point of the path back to the starting point * of the sub path. * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void close() { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { handle.closePath(); } finally { if (pool !is null) pool.release(); } } /** * Returns <code>true</code> if the specified point is contained by * the receiver and false otherwise. * <p> * If outline is <code>true</code>, the point (x, y) checked for containment in * the receiver's outline. If outline is <code>false</code>, the point is * checked to see if it is contained within the bounds of the (closed) area * covered by the receiver. * * @param x the x coordinate of the point to test for containment * @param y the y coordinate of the point to test for containment * @param gc the GC to use when testing for containment * @param outline controls whether to check the outline or contained area of the path * @return <code>true</code> if the path contains the point and <code>false</code> otherwise * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the gc is null</li> * <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public bool contains(float x, float y, GC gc, bool outline) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (gc is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (gc.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { // gc.checkGC(GC.LINE_CAP | GC.LINE_JOIN | GC.LINE_STYLE | GC.LINE_WIDTH); //TODO outline NSPoint point = NSPoint(); point.x = x; point.y = y; return handle.containsPoint(point); } finally { if (pool !is null) pool.release(); } } /** * Adds to the receiver a cubic bezier curve based on the parameters. * * @param cx1 the x coordinate of the first control point of the spline * @param cy1 the y coordinate of the first control of the spline * @param cx2 the x coordinate of the second control of the spline * @param cy2 the y coordinate of the second control of the spline * @param x the x coordinate of the end point of the spline * @param y the y coordinate of the end point of the spline * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSPoint pt = NSPoint(); pt.x = x; pt.y = y; NSPoint ct1 = NSPoint(); ct1.x = cx1; ct1.y = cy1; NSPoint ct2 = NSPoint(); ct2.x = cx2; ct2.y = cy2; handle.curveToPoint(pt, ct1, ct2); } finally { if (pool !is null) pool.release(); } } void destroy() { handle.release(); handle = null; } /** * Replaces the first four elements in the parameter with values that * describe the smallest rectangle that will completely contain the * receiver (i.e. the bounding box). * * @param bounds the array to hold the result * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> * <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the bounding box</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void getBounds(float[] bounds) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (bounds is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (bounds.length < 4) DWT.error(DWT.ERROR_INVALID_ARGUMENT); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSRect rect = handle.controlPointBounds(); bounds[0] = cast(float)/*64*/rect.x; bounds[1] = cast(float)/*64*/rect.y; bounds[2] = cast(float)/*64*/rect.width; bounds[3] = cast(float)/*64*/rect.height; } finally { if (pool !is null) pool.release(); } } /** * Replaces the first two elements in the parameter with values that * describe the current point of the path. * * @param point the array to hold the result * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> * <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the end point</li> * </ul> * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void getCurrentPoint(float[] point) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (point is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (point.length < 2) DWT.error(DWT.ERROR_INVALID_ARGUMENT); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSPoint pt = handle.currentPoint(); point[0] = cast(float)/*64*/pt.x; point[1] = cast(float)/*64*/pt.y; } finally { if (pool !is null) pool.release(); } } /** * Returns a device independent representation of the receiver. * * @return the PathData for the receiver * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see PathData */ public PathData getPathData() { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { int count = cast(int)/*64*/handle.elementCount(); int pointCount = 0, typeCount = 0; byte[] types = new byte[count]; float[] pointArray = new float[count * 6]; NSPointArray points = cast(NSPointArray) OS.malloc(3 * NSPoint.sizeof); if (points is null) DWT.error(DWT.ERROR_NO_HANDLES); NSPoint pt = NSPoint(); for (NSInteger i = 0; i < count; i++) { NSBezierPathElement element = handle.elementAtIndex(i, points); switch (element) { case OS.NSMoveToBezierPathElement: types[typeCount++] = DWT.PATH_MOVE_TO; OS.memmove(&pt, points, NSPoint.sizeof); pointArray[pointCount++] = cast(int)pt.x; pointArray[pointCount++] = cast(int)pt.y; break; case OS.NSLineToBezierPathElement: types[typeCount++] = DWT.PATH_LINE_TO; OS.memmove(&pt, points, NSPoint.sizeof); pointArray[pointCount++] = cast(int)pt.x; pointArray[pointCount++] = cast(int)pt.y; break; case OS.NSCurveToBezierPathElement: types[typeCount++] = DWT.PATH_CUBIC_TO; OS.memmove(&pt, points, NSPoint.sizeof); pointArray[pointCount++] = cast(int)pt.x; pointArray[pointCount++] = cast(int)pt.y; OS.memmove(&pt, points + NSPoint.sizeof, NSPoint.sizeof); pointArray[pointCount++] = cast(int)pt.x; pointArray[pointCount++] = cast(int)pt.y; OS.memmove(&pt, points + NSPoint.sizeof + NSPoint.sizeof, NSPoint.sizeof); pointArray[pointCount++] = cast(int)pt.x; pointArray[pointCount++] = cast(int)pt.y; break; case OS.NSClosePathBezierPathElement: types[typeCount++] = DWT.PATH_CLOSE; break; default: } } OS.free(points); if (pointCount !is pointArray.length) { float[] temp = new float[pointCount]; System.arraycopy(pointArray, 0, temp, 0, pointCount); pointArray = temp; } PathData data = new PathData(); data.types = types; data.points = pointArray; return data; } finally { if (pool !is null) pool.release(); } } void init_(PathData data) { byte[] types = data.types; float[] points = data.points; for (int i = 0, j = 0; i < types.length; i++) { switch (types[i]) { case DWT.PATH_MOVE_TO: moveTo(points[j++], points[j++]); break; case DWT.PATH_LINE_TO: lineTo(points[j++], points[j++]); break; case DWT.PATH_CUBIC_TO: cubicTo(points[j++], points[j++], points[j++], points[j++], points[j++], points[j++]); break; case DWT.PATH_QUAD_TO: quadTo(points[j++], points[j++], points[j++], points[j++]); break; case DWT.PATH_CLOSE: close(); break; default: dispose(); DWT.error(DWT.ERROR_INVALID_ARGUMENT); } } } /** * Returns <code>true</code> if the Path has been disposed, * and <code>false</code> otherwise. * <p> * This method gets the dispose state for the Path. * When a Path has been disposed, it is an error to * invoke any other method using the Path. * * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise */ public bool isDisposed() { return handle is null; } /** * Adds to the receiver a line from the current point to * the point specified by (x, y). * * @param x the x coordinate of the end of the line to add * @param y the y coordinate of the end of the line to add * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void lineTo(float x, float y) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSPoint pt = NSPoint(); pt.x = x; pt.y = y; handle.lineToPoint(pt); } finally { if (pool !is null) pool.release(); } } /** * Sets the current point of the receiver to the point * specified by (x, y). Note that this starts a new * sub path. * * @param x the x coordinate of the new end point * @param y the y coordinate of the new end point * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void moveTo(float x, float y) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSPoint pt = NSPoint(); pt.x = x; pt.y = y; handle.moveToPoint(pt); } finally { if (pool !is null) pool.release(); } } /** * Adds to the receiver a quadratic curve based on the parameters. * * @param cx the x coordinate of the control point of the spline * @param cy the y coordinate of the control point of the spline * @param x the x coordinate of the end point of the spline * @param y the y coordinate of the end point of the spline * * @exception DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void quadTo(float cx, float cy, float x, float y) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); NSAutoreleasePool pool = null; if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init(); try { NSPoint pt = NSPoint(); pt.x = x; pt.y = y; NSPoint ct = NSPoint(); ct.x = cx; ct.y = cy; handle.curveToPoint(pt, ct, ct); } finally { if (pool !is null) pool.release(); } } /** * 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 "Path {*DISPOSED*}"; return Format("Path {{}{}" , handle , "}"); } }