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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/Path.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/Path.java | 813 |
1 files changed, 813 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/Path.java b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/Path.java new file mode 100644 index 0000000000..a07137b8ca --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/Path.java @@ -0,0 +1,813 @@ +/******************************************************************************* + * 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 + *******************************************************************************/ +package org.eclipse.swt.graphics; + +import org.eclipse.swt.*; +import org.eclipse.swt.internal.*; +import org.eclipse.swt.internal.carbon.*; +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> + */ + public int handle; + + boolean moved, 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); + handle = OS.CGPathCreateMutable(); + if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); + init(); +} + +/** + * 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); + 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 = OS.CGPathCreateMutableCopy(path.handle); + if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); + } else { + handle = OS.CGPathCreateMutable(); + if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); + PathData data = path.getPathData(); + int bezierPath = Cocoa.objc_msgSend(Cocoa.C_NSBezierPath, Cocoa.S_bezierPath); + byte[] types = data.types; + float[] points = data.points; + NSPoint point = new NSPoint(), point2 = new NSPoint(), point3 = new NSPoint(); + for (int i = 0, j = 0; i < types.length; i++) { + switch (types[i]) { + case SWT.PATH_MOVE_TO: + point.x = points[j++]; + point.y = points[j++]; + Cocoa.objc_msgSend(bezierPath, Cocoa.S_moveToPoint, point); + break; + case SWT.PATH_LINE_TO: + point.x = points[j++]; + point.y = points[j++]; + Cocoa.objc_msgSend(bezierPath, Cocoa.S_lineToPoint, point); + break; + case SWT.PATH_CUBIC_TO: + point2.x = points[j++]; + point2.y = points[j++]; + point3.x = points[j++]; + point3.y = points[j++]; + point.x = points[j++]; + point.y = points[j++]; + Cocoa.objc_msgSend(bezierPath, Cocoa.S_curveToPoint, point, point2, point3); + break; + case SWT.PATH_QUAD_TO: + float currentX = point.x; + float currentY = point.y; + point2.x = points[j++]; + point2.y = points[j++]; + point.x = points[j++]; + point.y = points[j++]; + float x0 = currentX; + float y0 = currentY; + float cx1 = x0 + 2 * (point2.x - x0) / 3; + float cy1 = y0 + 2 * (point2.y - y0) / 3; + float cx2 = cx1 + (point.x - x0) / 3; + float cy2 = cy1 + (point.y - y0) / 3; + point2.x = cx1; + point2.y = cy1; + point3.x = cx2; + point3.y = cy2; + Cocoa.objc_msgSend(bezierPath, Cocoa.S_curveToPoint, point, point2, point3); + break; + case SWT.PATH_CLOSE: + Cocoa.objc_msgSend(bezierPath, Cocoa.S_closePath); + break; + default: + dispose(); + SWT.error(SWT.ERROR_INVALID_ARGUMENT); + } + } + Cocoa.objc_msgSend(Cocoa.C_NSBezierPath, Cocoa.S_setDefaultFlatness, flatness); + bezierPath = Cocoa.objc_msgSend(bezierPath, Cocoa.S_bezierPathByFlatteningPath); + int count = Cocoa.objc_msgSend(bezierPath, Cocoa.S_elementCount); + int pointsPtr = OS.malloc(NSPoint.sizeof * 3); + if (pointsPtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); + for (int i = 0; i < count; i++) { + int element = Cocoa.objc_msgSend(bezierPath, Cocoa.S_elementAtIndex_associatedPoints, i, pointsPtr); + switch (element) { + case Cocoa.NSMoveToBezierPathElement: + Cocoa.memmove(point, pointsPtr, NSPoint.sizeof); + moveTo(point.x, point.y); + break; + case Cocoa.NSLineToBezierPathElement: + Cocoa.memmove(point, pointsPtr, NSPoint.sizeof); + lineTo(point.x, point.y); + break; + case Cocoa.NSCurveToBezierPathElement: + Cocoa.memmove(point, pointsPtr, NSPoint.sizeof); + Cocoa.memmove(point2, pointsPtr + NSPoint.sizeof, NSPoint.sizeof); + Cocoa.memmove(point3, pointsPtr + NSPoint.sizeof + NSPoint.sizeof, NSPoint.sizeof); + cubicTo(point2.x, point2.y, point3.x, point3.y, point.x, point.y); + break; + case Cocoa.NSClosePathBezierPathElement: + close(); + break; + } + } + OS.free(pointsPtr); + } + init(); +} + +/** + * 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); + if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + init(data); +} + +/** + * 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); + float[] cmt = new float[6]; + OS.CGAffineTransformMake(width / 2f, 0, 0, height / 2f, x + width / 2f, y + height / 2f, cmt); + float angle = -startAngle * (float)Compatibility.PI / 180; + if (closed) OS.CGPathMoveToPoint(handle, cmt, (float)Math.cos(angle), (float)Math.sin(angle)); + OS.CGPathAddArc(handle, cmt, 0, 0, 1, angle, -(startAngle + arcAngle) * (float)Compatibility.PI / 180, arcAngle >= 0); + moved = true; + closed = false; + if (Math.abs(arcAngle) >= 360) close(); +} + +/** + * 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); + OS.CGPathAddPath(handle, null, path.handle); + moved = false; + closed = path.closed; +} + +/** + * 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); + CGRect rect = new CGRect(); + rect.x = x; + rect.y = y; + rect.width = width; + rect.height = height; + OS.CGPathAddRect(handle, null, rect); + moved = false; + closed = true; +} + +int newPathProc(int data) { + first = true; + return 0; +} + +int closePathProc(int data) { + first = true; + return 0; +} + +int lineProc(int pt1, int pt2, int data) { + if (first) { + first = false; + OS.memmove(point, pt1, 8); + OS.CGPathMoveToPoint(handle, null, originX + point[0], originY + point[1]); + } + OS.memmove(point, pt2, 8); + OS.CGPathAddLineToPoint(handle, null, originX + point[0], originY + point[1]); + return 0; +} + +int curveProc(int pt1, int controlPt, int pt2, int data) { + if (first) { + first = false; + OS.memmove(point, pt1, 8); + OS.CGPathMoveToPoint(handle, null, originX + point[0], originY + point[1]); + } + OS.memmove(point, pt2, 8); + float x2 = point[0], y2 = point[1]; + OS.memmove(point, controlPt, 8); + OS.CGPathAddQuadCurveToPoint(handle, null, originX + point[0], originY + point[1], originX + x2, originY + y2); + return 0; +} + +float originX, originY; +float[] point = new float[2]; +boolean first; +/** + * 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); + int length = string.length(); + if (length == 0) return; + moved = false; + closed = true; + + Callback newPathCallback = new Callback(this, "newPathProc", 1); + int newPathProc = newPathCallback.getAddress(); + if (newPathProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); + Callback lineCallback = new Callback(this, "lineProc", 3); + int lineProc = lineCallback.getAddress(); + if (lineProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); + Callback curveCallback = new Callback(this, "curveProc", 4); + int curveProc = curveCallback.getAddress(); + if (curveProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); + Callback closePathCallback = new Callback(this, "closePathProc", 1); + int closePathProc = closePathCallback.getAddress(); + if (closePathProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); + + int style = font.atsuiStyle; + if (style == 0) style = font.createStyle(); + if (style == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int[] buffer = new int[1]; + OS.ATSUCreateTextLayout(buffer); + if (buffer[0] == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int layout = buffer[0]; + char[] chars = new char[length]; + string.getChars(0, length, chars, 0); + int textPtr = OS.NewPtr(length * 2); + if (textPtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); + OS.memmove(textPtr, chars, length * 2); + OS.ATSUSetTextPointerLocation(layout, textPtr, 0, length, length); + OS.ATSUSetRunStyle(layout, style, 0, length); + OS.ATSUSetTransientFontMatching(layout, true); + int[] ascent = new int[1], descent = new int[1]; + OS.ATSUGetUnjustifiedBounds(layout, 0, length, null, null, ascent, descent); + y += OS.Fix2X(ascent[0]); + + int[] layoutRecords = new int[1], numRecords = new int[1], deltaYs = new int[1], numDeltaYs = new int[1]; + OS.ATSUDirectGetLayoutDataArrayPtrFromTextLayout (layout, 0, OS.kATSUDirectDataLayoutRecordATSLayoutRecordCurrent, layoutRecords, numRecords); + OS.ATSUDirectGetLayoutDataArrayPtrFromTextLayout (layout, 0, OS.kATSUDirectDataBaselineDeltaFixedArray, deltaYs, numDeltaYs); + int[] deltaY = new int[1], status = new int[1]; + ATSLayoutRecord record = new ATSLayoutRecord(); + for (int i = 0; i < numRecords[0]; i++) { + OS.memmove(record, layoutRecords[0] + (i * ATSLayoutRecord.sizeof), ATSLayoutRecord.sizeof); + originX = x + (float)OS.Fix2X(record.realPos); + if (deltaYs[0] == 0) { + originY = y; + } else { + OS.memmove(deltaY, deltaYs[0] + (i * 4), 4); + originY = y - (float)OS.Fix2X(deltaY[0]); + } + first = true; + if (record.glyphID != OS.kATSDeletedGlyphcode) { + OS.ATSUGlyphGetQuadraticPaths (style, record.glyphID, newPathProc, lineProc, curveProc, closePathProc, 0, status); + } + } + OS.CGPathCloseSubpath(handle); + if (deltaYs[0] != 0) { + OS.ATSUDirectReleaseLayoutDataArrayPtr(0, OS.kATSUDirectDataBaselineDeltaFixedArray, deltaYs[0]); + } + OS.ATSUDirectReleaseLayoutDataArrayPtr(0, OS.kATSUDirectDataLayoutRecordATSLayoutRecordCurrent, layoutRecords[0]); + + if (style != font.atsuiStyle) OS.ATSUDisposeStyle(style); + if (layout != 0) OS.ATSUDisposeTextLayout(layout); + if (textPtr != 0) OS.DisposePtr(textPtr); + + newPathCallback.dispose(); + lineCallback.dispose(); + curveCallback.dispose(); + closePathCallback.dispose(); +} + +CGPathElement element; +int count, typeCount; +byte[] types; +float[] points; +int applierFunc(int info, int elementPtr) { + OS.memmove(element, elementPtr, CGPathElement.sizeof); + int type = 0, length = 1; + switch (element.type) { + case OS.kCGPathElementMoveToPoint: type = SWT.PATH_MOVE_TO; break; + case OS.kCGPathElementAddLineToPoint: type = SWT.PATH_LINE_TO; break; + case OS.kCGPathElementAddQuadCurveToPoint: type = SWT.PATH_QUAD_TO; length = 2; break; + case OS.kCGPathElementAddCurveToPoint: type = SWT.PATH_CUBIC_TO; length = 3; break; + case OS.kCGPathElementCloseSubpath: type = SWT.PATH_CLOSE; length = 0; break; + } + if (types != null) { + types[typeCount] = (byte)type; + if (length > 0) { + OS.memmove(point, element.points, length * 8); + System.arraycopy(point, 0, points, count, length * 2); + } + } + typeCount++; + count += length * 2; + return 0; +} + +/** + * 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); + OS.CGPathCloseSubpath(handle); + moved = false; + closed = true; +} + +/** + * 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); + gc.checkGC(GC.LINE_CAP | GC.LINE_JOIN | GC.LINE_STYLE | GC.LINE_WIDTH); + //TODO - see windows + int pixel = OS.NewPtr(4); + if (pixel == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int[] buffer = new int[]{0xFFFFFFFF}; + OS.memmove(pixel, buffer, 4); + int context = OS.CGBitmapContextCreate(pixel, 1, 1, 8, 4, device.colorspace, OS.kCGImageAlphaNoneSkipFirst); + if (context == 0) { + OS.DisposePtr(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); + OS.CGContextAddPath(context, handle); + if (outline) { + OS.CGContextStrokePath(context); + } else { + if (data.fillRule == SWT.FILL_WINDING) { + OS.CGContextFillPath(context); + } else { + OS.CGContextEOFillPath(context); + } + } + OS.CGContextRelease(context); + OS.memmove(buffer, pixel, 4); + OS.DisposePtr(pixel); + return buffer[0] != 0xFFFFFFFF; +} + +/** + * 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); + if (!moved) { + CGPoint pt = new CGPoint(); + if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); + OS.CGPathMoveToPoint(handle, null, pt.x, pt.y); + moved = true; + } + closed = false; + OS.CGPathAddCurveToPoint(handle, null, cx1, cy1, cx2, cy2, x, y); +} + +void destroy() { + OS.CGPathRelease(handle); + handle = 0; +} + +/** + * 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); + CGRect rect = new CGRect(); + OS.CGPathGetBoundingBox(handle, rect); + bounds[0] = rect.x; + bounds[1] = rect.y; + bounds[2] = rect.width; + bounds[3] = rect.height; +} + +/** + * 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); + CGPoint pt = new CGPoint(); + if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); + point[0] = pt.x; + point[1] = pt.y; +} + +/** + * 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); + Callback callback = new Callback(this, "applierFunc", 2); + int proc = callback.getAddress(); + if (proc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); + count = typeCount = 0; + element = new CGPathElement(); + OS.CGPathApply(handle, 0, proc); + types = new byte[typeCount]; + points = new float[count]; + point = new float[6]; + count = typeCount = 0; + OS.CGPathApply(handle, 0, proc); + callback.dispose(); + PathData result = new PathData(); + result.types = types; + result.points = points; + element = null; + types = null; + points = null; + point = null; + return result; +} + +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 using the Path. + * + * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise + */ +public boolean isDisposed() { + return handle == 0; +} + +/** + * 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); + if (!moved) { + CGPoint pt = new CGPoint(); + if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); + OS.CGPathMoveToPoint(handle, null, pt.x, pt.y); + moved = true; + } + closed = false; + OS.CGPathAddLineToPoint(handle, null, x, y); +} + +/** + * 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); + OS.CGPathMoveToPoint(handle, null, x, y); + /* + * Bug in Quartz. If CGPathMoveToPoint() is not called at the + * begining of a subpath, the following segments do not output + * anything. The fix is to detect that the app did not call + * CGPathMoveToPoint() and call it explicitly. + */ + closed = true; + moved = true; +} + +/** + * 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); + if (!moved) { + CGPoint pt = new CGPoint(); + if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); + OS.CGPathMoveToPoint(handle, null, pt.x, pt.y); + moved = true; + } + closed = false; + OS.CGPathAddQuadCurveToPoint(handle, null, cx, cy, x, 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 "Path {*DISPOSED*}"; + return "Path {" + handle + "}"; +} + +} |