| /******************************************************************************* |
| * Copyright (c) 2000, 2009 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.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">SWT Example: GraphicsExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * |
| * @since 3.1 |
| */ |
| public class Path extends Resource { |
| |
| /** |
| * 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 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 NSBezierPath handle; |
| |
| boolean closed = true; |
| |
| /** |
| * 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 SWTException <ul> |
| * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> |
| * </ul> |
| * |
| * @see #dispose() |
| */ |
| public Path (Device device) { |
| super(device); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| handle = NSBezierPath.bezierPath(); |
| if (handle == null) SWT.error(SWT.ERROR_NO_HANDLES); |
| handle.retain(); |
| handle.moveToPoint(new NSPoint()); |
| init(); |
| } finally { |
| if (pool != 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 SWTException <ul> |
| * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> |
| * </ul> |
| * |
| * @see #dispose() |
| * @since 3.4 |
| */ |
| public Path (Device device, Path path, float flatness) { |
| super(device); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| flatness = Math.max(0, flatness); |
| if (flatness == 0) { |
| handle = new NSBezierPath(path.handle.copy().id); |
| } else { |
| float /*double*/ defaultFlatness = NSBezierPath.defaultFlatness(); |
| NSBezierPath.setDefaultFlatness(flatness); |
| handle = path.handle.bezierPathByFlatteningPath(); |
| handle.retain(); |
| NSBezierPath.setDefaultFlatness(defaultFlatness); |
| } |
| if (handle == null) SWT.error(SWT.ERROR_NO_HANDLES); |
| init(); |
| } finally { |
| if (pool != 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 SWTException <ul> |
| * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> |
| * </ul> |
| * |
| * @see #dispose() |
| * @since 3.4 |
| */ |
| public Path (Device device, PathData data) { |
| this(device); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| init(data); |
| } finally { |
| if (pool != 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 SWTException <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()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (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 = new NSPoint(); |
| float sAngle = -startAngle; |
| float eAngle = -(startAngle + arcAngle); |
| path.appendBezierPathWithArcWithCenter(center, 1, sAngle, eAngle, arcAngle>0); |
| path.transformUsingAffineTransform(transform); |
| // handle.appendBezierPath(path); |
| appendBezierPath(path); |
| if (closed = (Math.abs(arcAngle) >= 360)) { |
| handle.closePath(); |
| } |
| } finally { |
| if (pool != null) pool.release(); |
| } |
| } |
| |
| void appendBezierPath (NSBezierPath path) { |
| int count = (int)/*64*/path.elementCount(); |
| int /*long*/ points = OS.malloc(3 * NSPoint.sizeof); |
| if (points == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| NSPoint pt1 = new NSPoint(); |
| NSPoint pt2 = new NSPoint(); |
| NSPoint pt3 = new NSPoint(); |
| for (int i = 0; i < count; i++) { |
| int element = (int)/*64*/path.elementAtIndex(i, points); |
| switch (element) { |
| case OS.NSMoveToBezierPathElement: |
| OS.memmove(pt1, points, NSPoint.sizeof); |
| if (closed) { |
| handle.moveToPoint(pt1); |
| } else { |
| handle.lineToPoint(pt1); |
| } |
| break; |
| case OS.NSLineToBezierPathElement: |
| OS.memmove(pt1, points, NSPoint.sizeof); |
| handle.lineToPoint(pt1); |
| closed = false; |
| break; |
| case OS.NSCurveToBezierPathElement: |
| OS.memmove(pt1, points, NSPoint.sizeof); |
| OS.memmove(pt2, points + NSPoint.sizeof, NSPoint.sizeof); |
| OS.memmove(pt3, points + NSPoint.sizeof + NSPoint.sizeof, NSPoint.sizeof); |
| handle.curveToPoint(pt3, pt1, pt2); |
| closed = false; |
| break; |
| case OS.NSClosePathBezierPathElement: |
| handle.closePath(); |
| closed = true; |
| break; |
| } |
| } |
| OS.free(points); |
| } |
| |
| /** |
| * 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void addPath(Path path) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| handle.appendBezierPath(path.handle); |
| closed = path.closed; |
| } finally { |
| if (pool != 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 SWTException <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()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSRect rect = new NSRect(); |
| rect.x = x; |
| rect.y = y; |
| rect.width = width; |
| rect.height = height; |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| handle.appendBezierPathWithRect(rect); |
| closed = true; |
| } finally { |
| if (pool != 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 string 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void addString(String string, float x, float y, Font font) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (font == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| closed = true; |
| NSString str = NSString.stringWith(string); |
| NSTextStorage textStorage = (NSTextStorage)new NSTextStorage().alloc().init(); |
| NSLayoutManager layoutManager = (NSLayoutManager)new NSLayoutManager().alloc().init(); |
| NSTextContainer textContainer = (NSTextContainer)new NSTextContainer().alloc(); |
| NSSize size = new NSSize(); |
| size.width = OS.MAX_TEXT_CONTAINER_SIZE; |
| size.height = OS.MAX_TEXT_CONTAINER_SIZE; |
| textContainer.initWithContainerSize(size); |
| textStorage.addLayoutManager(layoutManager); |
| layoutManager.addTextContainer(textContainer); |
| NSRange range = new NSRange(); |
| range.length = str.length(); |
| /* |
| * Feature in Cocoa. Adding attributes directly to a NSTextStorage causes |
| * output to the console and eventually a segmentation fault when printing |
| * on a thread other than the main thread. The fix is to add attributes to |
| * a separate NSMutableAttributedString and add it to text storage when done. |
| */ |
| NSMutableAttributedString attrStr = (NSMutableAttributedString)new NSMutableAttributedString().alloc(); |
| attrStr.id = attrStr.initWithString(str).id; |
| attrStr.beginEditing(); |
| attrStr.addAttribute(OS.NSFontAttributeName, font.handle, range); |
| font.addTraits(attrStr, range); |
| attrStr.endEditing(); |
| textStorage.setAttributedString(attrStr); |
| attrStr.release(); |
| range = layoutManager.glyphRangeForTextContainer(textContainer); |
| if (range.length != 0) { |
| int /*long*/ glyphs = OS.malloc(4 * range.length * 2); |
| layoutManager.getGlyphs(glyphs, range); |
| NSBezierPath path = NSBezierPath.bezierPath(); |
| NSPoint point = new NSPoint(); |
| path.moveToPoint(point); |
| path.appendBezierPathWithGlyphs(glyphs, range.length, font.handle); |
| NSAffineTransform transform = NSAffineTransform.transform(); |
| transform.scaleXBy(1, -1); |
| float /*double*/ baseline = layoutManager.defaultBaselineOffsetForFont(font.handle); |
| transform.translateXBy(x, -(y + baseline)); |
| path.transformUsingAffineTransform(transform); |
| OS.free(glyphs); |
| handle.appendBezierPath(path); |
| } |
| textContainer.release(); |
| layoutManager.release(); |
| textStorage.release(); |
| } finally { |
| if (pool != 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void close() { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| handle.closePath(); |
| closed = true; |
| } finally { |
| if (pool != 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean contains(float x, float y, GC gc, boolean outline) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| //TODO - see windows |
| if (outline) { |
| int /*long*/ pixel = OS.malloc(4); |
| if (pixel == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int[] buffer = new int[]{0xFFFFFFFF}; |
| OS.memmove(pixel, buffer, 4); |
| int /*long*/ colorspace = OS.CGColorSpaceCreateDeviceRGB(); |
| int /*long*/ context = OS.CGBitmapContextCreate(pixel, 1, 1, 8, 4, colorspace, OS.kCGImageAlphaNoneSkipFirst); |
| OS.CGColorSpaceRelease(colorspace); |
| if (context == 0) { |
| OS.free(pixel); |
| SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| GCData data = gc.data; |
| int capStyle = 0; |
| switch (data.lineCap) { |
| case SWT.CAP_ROUND: capStyle = OS.kCGLineCapRound; break; |
| case SWT.CAP_FLAT: capStyle = OS.kCGLineCapButt; break; |
| case SWT.CAP_SQUARE: capStyle = OS.kCGLineCapSquare; break; |
| } |
| OS.CGContextSetLineCap(context, capStyle); |
| int joinStyle = 0; |
| switch (data.lineJoin) { |
| case SWT.JOIN_MITER: joinStyle = OS.kCGLineJoinMiter; break; |
| case SWT.JOIN_ROUND: joinStyle = OS.kCGLineJoinRound; break; |
| case SWT.JOIN_BEVEL: joinStyle = OS.kCGLineJoinBevel; break; |
| } |
| OS.CGContextSetLineJoin(context, joinStyle); |
| OS.CGContextSetLineWidth(context, data.lineWidth); |
| OS.CGContextTranslateCTM(context, -x + 0.5f, -y + 0.5f); |
| int /*long*/ path = GC.createCGPathRef(handle); |
| OS.CGContextAddPath(context, path); |
| OS.CGPathRelease(path); |
| OS.CGContextStrokePath(context); |
| OS.CGContextRelease(context); |
| OS.memmove(buffer, pixel, 4); |
| OS.free(pixel); |
| return buffer[0] != 0xFFFFFFFF; |
| } else { |
| NSPoint point = new NSPoint(); |
| point.x = x; |
| point.y = y; |
| return handle.containsPoint(point); |
| } |
| } finally { |
| if (pool != 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 SWTException <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()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| NSPoint pt = new NSPoint(); |
| pt.x = x; |
| pt.y = y; |
| NSPoint ct1 = new NSPoint(); |
| ct1.x = cx1; |
| ct1.y = cy1; |
| NSPoint ct2 = new NSPoint(); |
| ct2.x = cx2; |
| ct2.y = cy2; |
| handle.curveToPoint(pt, ct1, ct2); |
| closed = false; |
| } finally { |
| if (pool != 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void getBounds(float[] bounds) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (bounds.length < 4) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| NSRect rect = handle.controlPointBounds(); |
| bounds[0] = (float)/*64*/rect.x; |
| bounds[1] = (float)/*64*/rect.y; |
| bounds[2] = (float)/*64*/rect.width; |
| bounds[3] = (float)/*64*/rect.height; |
| } finally { |
| if (pool != 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void getCurrentPoint(float[] point) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (point == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (point.length < 2) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| NSPoint pt = handle.currentPoint(); |
| point[0] = (float)/*64*/pt.x; |
| point[1] = (float)/*64*/pt.y; |
| } finally { |
| if (pool != null) pool.release(); |
| } |
| } |
| |
| /** |
| * Returns a device independent representation of the receiver. |
| * |
| * @return the PathData for the receiver |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see PathData |
| */ |
| public PathData getPathData() { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| int count = (int)/*64*/handle.elementCount(); |
| int pointCount = 0, typeCount = 0; |
| byte[] types = new byte[count]; |
| float[] pointArray = new float[count * 6]; |
| int /*long*/ points = OS.malloc(3 * NSPoint.sizeof); |
| if (points == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| NSPoint pt = new NSPoint(); |
| for (int i = 0; i < count; i++) { |
| int element = (int)/*64*/handle.elementAtIndex(i, points); |
| switch (element) { |
| case OS.NSMoveToBezierPathElement: |
| types[typeCount++] = SWT.PATH_MOVE_TO; |
| OS.memmove(pt, points, NSPoint.sizeof); |
| pointArray[pointCount++] = (float)pt.x; |
| pointArray[pointCount++] = (float)pt.y; |
| break; |
| case OS.NSLineToBezierPathElement: |
| types[typeCount++] = SWT.PATH_LINE_TO; |
| OS.memmove(pt, points, NSPoint.sizeof); |
| pointArray[pointCount++] = (float)pt.x; |
| pointArray[pointCount++] = (float)pt.y; |
| break; |
| case OS.NSCurveToBezierPathElement: |
| types[typeCount++] = SWT.PATH_CUBIC_TO; |
| OS.memmove(pt, points, NSPoint.sizeof); |
| pointArray[pointCount++] = (float)pt.x; |
| pointArray[pointCount++] = (float)pt.y; |
| OS.memmove(pt, points + NSPoint.sizeof, NSPoint.sizeof); |
| pointArray[pointCount++] = (float)pt.x; |
| pointArray[pointCount++] = (float)pt.y; |
| OS.memmove(pt, points + NSPoint.sizeof + NSPoint.sizeof, NSPoint.sizeof); |
| pointArray[pointCount++] = (float)pt.x; |
| pointArray[pointCount++] = (float)pt.y; |
| break; |
| case OS.NSClosePathBezierPathElement: |
| types[typeCount++] = SWT.PATH_CLOSE; |
| break; |
| } |
| } |
| OS.free(points); |
| if (pointCount != 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 != 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 SWT.PATH_MOVE_TO: |
| moveTo(points[j++], points[j++]); |
| break; |
| case SWT.PATH_LINE_TO: |
| lineTo(points[j++], points[j++]); |
| break; |
| case SWT.PATH_CUBIC_TO: |
| cubicTo(points[j++], points[j++], points[j++], points[j++], points[j++], points[j++]); |
| break; |
| case SWT.PATH_QUAD_TO: |
| quadTo(points[j++], points[j++], points[j++], points[j++]); |
| break; |
| case SWT.PATH_CLOSE: |
| close(); |
| break; |
| default: |
| dispose(); |
| SWT.error(SWT.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 (except {@link #dispose()}) using the Path. |
| * |
| * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise |
| */ |
| public boolean isDisposed() { |
| return handle == 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void lineTo(float x, float y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| NSPoint pt = new NSPoint(); |
| pt.x = x; |
| pt.y = y; |
| handle.lineToPoint(pt); |
| closed = false; |
| } finally { |
| if (pool != 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 SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void moveTo(float x, float y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| NSPoint pt = new NSPoint(); |
| pt.x = x; |
| pt.y = y; |
| handle.moveToPoint(pt); |
| closed = true; |
| } finally { |
| if (pool != 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 SWTException <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()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| NSAutoreleasePool pool = null; |
| if (!NSThread.isMainThread()) pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init(); |
| try { |
| NSPoint current = handle.isEmpty() ? new NSPoint() : handle.currentPoint(); |
| NSPoint ct1 = new NSPoint(); |
| ct1.x = current.x + 2 * (cx - current.x) / 3; |
| ct1.y = current.y + 2 * (cy - current.y) / 3; |
| NSPoint ct2 = new NSPoint(); |
| ct2.x = ct1.x + (x - current.x) / 3; |
| ct2.y = ct1.y + (y - current.y) / 3; |
| NSPoint pt = new NSPoint(); |
| pt.x = x; |
| pt.y = y; |
| handle.curveToPoint(pt, ct1, ct2); |
| closed = false; |
| } finally { |
| if (pool != 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 "Path {" + handle + "}"; |
| } |
| |
| } |