| package org.eclipse.swt.graphics; |
| |
| /* |
| * Copyright (c) 2000, 2002 IBM Corp. All rights reserved. |
| * This file is made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| */ |
| |
| import org.eclipse.swt.internal.carbon.*; |
| import org.eclipse.swt.*; |
| |
| /** |
| * Class <code>GC</code> is where all of the drawing capabilities that are |
| * supported by SWT are located. Instances are used to draw on either an |
| * <code>Image</code>, a <code>Control</code>, or directly on a <code>Display</code>. |
| * <p> |
| * Application code must explicitly invoke the <code>GC.dispose()</code> |
| * method to release the operating system resources managed by each instance |
| * when those instances are no longer required. This is <em>particularly</em> |
| * important on Windows95 and Windows98 where the operating system has a limited |
| * number of device contexts available. |
| * </p> |
| * |
| * @see org.eclipse.swt.events.PaintEvent |
| */ |
| public final class GC { |
| /** |
| * the handle to the OS device context |
| * (Warning: This field is platform dependent) |
| */ |
| public int handle; |
| |
| Drawable drawable; |
| GCData data; |
| |
| GC() { |
| } |
| |
| /** |
| * Constructs a new instance of this class which has been |
| * configured to draw on the specified drawable. Sets the |
| * foreground and background color in the GC to match those |
| * in the drawable. |
| * <p> |
| * You must dispose the graphics context when it is no longer required. |
| * </p> |
| * @param drawable the drawable to draw on |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the drawable is null</li> |
| * <li>ERROR_NULL_ARGUMENT - if there is no current device</li> |
| * <li>ERROR_INVALID_ARGUMENT |
| * - if the drawable is an image that is not a bitmap or an icon |
| * - if the drawable is an image or printer that is already selected |
| * into another graphics context</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle could not be obtained for gc creation</li> |
| * </ul> |
| */ |
| public GC(Drawable drawable) { |
| if (drawable == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| GCData data = new GCData(); |
| int gdkGC = drawable.internal_new_GC(data); |
| init(drawable, data, gdkGC); |
| } |
| |
| /** |
| * Invokes platform specific functionality to allocate a new graphics context. |
| * <p> |
| * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
| * API for <code>GC</code>. It is marked public only so that it |
| * can be shared within the packages provided by SWT. It is not |
| * available on all platforms, and should never be called from |
| * application code. |
| * </p> |
| * |
| * @param drawable the Drawable for the receiver. |
| * @param data the data for the receiver. |
| * |
| * @return a new <code>GC</code> |
| * |
| * @private |
| */ |
| public static GC carbon_new(Drawable drawable, GCData data) { |
| GC gc = new GC(); |
| int context = drawable.internal_new_GC(data); |
| gc.init(drawable, data, context); |
| return gc; |
| } |
| |
| /** |
| * Copies a rectangular area of the receiver at the specified |
| * position into the image, which must be of type <code>SWT.BITMAP</code>. |
| * |
| * @param x the x coordinate in the receiver of the area to be copied |
| * @param y the y coordinate in the receiver of the area to be copied |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the image is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the image is not a bitmap or has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void copyArea(Image image, int x, int y) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (image.type != SWT.BITMAP || image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| //NOT IMPLEMENTED |
| } |
| |
| /** |
| * Copies a rectangular area of the receiver at the source |
| * position onto the receiver at the destination position. |
| * |
| * @param srcX the x coordinate in the receiver of the area to be copied |
| * @param srcY the y coordinate in the receiver of the area to be copied |
| * @param width the width of the area to copy |
| * @param height the height of the area to copy |
| * @param destX the x coordinate in the receiver of the area to copy to |
| * @param destY the y coordinate in the receiver of the area to copy to |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void copyArea(int srcX, int srcY, int width, int height, int destX, int destY) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width <= 0 || height <= 0) return; |
| int deltaX = destX - srcX, deltaY = destY - srcY; |
| if (deltaX == 0 && deltaY == 0) return; |
| if (data.image != null) { |
| OS.CGContextSaveGState(handle); |
| OS.CGContextScaleCTM(handle, 1, -1); |
| OS.CGContextTranslateCTM(handle, 0, -(height + 2 * destY)); |
| CGRect rect = new CGRect(); |
| rect.x = destX; |
| rect.y = destY; |
| rect.width = width; |
| rect.height = height; |
| //NOT DONE - transparency |
| OS.CGContextDrawImage(handle, rect, data.image.handle); |
| OS.CGContextRestoreGState(handle); |
| return; |
| } |
| if (data.control != 0) { |
| int window = OS.GetControlOwner(data.control); |
| int port = OS.GetWindowPort(window); |
| |
| /* Calculate src and dest rectangles/regions */ |
| Rect rect = new Rect(); |
| OS.GetControlBounds(data.control, rect); |
| Rect srcRect = new Rect(); |
| OS.GetControlBounds(data.control, srcRect); |
| int left = srcRect.left + srcX; |
| int top = srcRect.top + srcY; |
| OS.SetRect(srcRect, (short)left, (short)top, (short)(left + width), (short)(top + height)); |
| int srcRgn = OS.NewRgn(); |
| OS.RectRgn(srcRgn, srcRect); |
| OS.SectRect(rect, srcRect, srcRect); |
| Rect destRect = new Rect (); |
| destRect.left = srcRect.left; |
| destRect.top = srcRect.top; |
| destRect.right = srcRect.right; |
| destRect.bottom = srcRect.bottom; |
| OS.OffsetRect(destRect, (short)deltaX, (short)deltaY); |
| int destRgn = OS.NewRgn(); |
| OS.RectRgn(destRgn, destRect); |
| |
| /* Copy bits with appropriated clipping region */ |
| if (!OS.EmptyRect(srcRect)) { |
| int clipRgn = data.visibleRgn; |
| if (data.clipRgn != 0) { |
| clipRgn = OS.NewRgn(); |
| OS.SectRgn(data.clipRgn, clipRgn, clipRgn); |
| } |
| |
| /* |
| * Feature in the Macintosh. ScrollRect() only copies bits |
| * that are inside the specified rectangle. This means that |
| * it is not possible to copy non overlaping bits without |
| * copying the bits in between the source and destination |
| * rectangles. The fix is to check if the source and |
| * destination rectangles are disjoint and use CopyBits() |
| * instead. |
| */ |
| boolean disjoint = (destX + width < srcX) || (srcX + width < destX) || (destY + height < srcY) || (srcY + height < destY); |
| if (!disjoint && (deltaX == 0 || deltaY == 0)) { |
| int[] currentPort = new int[1]; |
| OS.GetPort(currentPort); |
| OS.SetPort(port); |
| int oldClip = OS.NewRgn(); |
| OS.GetClip(oldClip); |
| OS.SetClip(clipRgn); |
| OS.UnionRect(srcRect, destRect, rect); |
| OS.ScrollRect(rect, (short)deltaX, (short)deltaY, 0); |
| OS.SetClip(oldClip); |
| OS.DisposeRgn(oldClip); |
| OS.SetPort(currentPort[0]); |
| } else { |
| int portBitMap = OS.GetPortBitMapForCopyBits (port); |
| OS.CopyBits(portBitMap, portBitMap, srcRect, destRect, (short)OS.srcCopy, clipRgn); |
| OS.QDFlushPortBuffer(port, destRgn); |
| } |
| |
| if (clipRgn != data.visibleRgn) OS.DisposeRgn(clipRgn); |
| } |
| |
| /* Invalidate src and obscured areas */ |
| int invalRgn = OS.NewRgn(); |
| OS.DiffRgn(srcRgn, data.visibleRgn, invalRgn); |
| OS.OffsetRgn(invalRgn, (short)deltaX, (short)deltaY); |
| OS.DiffRgn(srcRgn, destRgn, srcRgn); |
| OS.UnionRgn(srcRgn, invalRgn, invalRgn); |
| OS.SectRgn(data.visibleRgn, invalRgn, invalRgn); |
| OS.InvalWindowRgn(window, invalRgn); |
| OS.DisposeRgn(invalRgn); |
| |
| /* Dispose src and dest regions */ |
| OS.DisposeRgn(destRgn); |
| OS.DisposeRgn(srcRgn); |
| } |
| } |
| |
| /** |
| * Disposes of the operating system resources associated with |
| * the graphics context. Applications must dispose of all GCs |
| * which they allocate. |
| */ |
| public void dispose() { |
| if (handle == 0) return; |
| if (data.device.isDisposed()) return; |
| |
| /* Free resources */ |
| int clipRgn = data.clipRgn; |
| if (clipRgn != 0) OS.DisposeRgn(clipRgn); |
| Image image = data.image; |
| if (image != null) { |
| image.memGC = null; |
| if (image.transparentPixel != -1) image.createMask(); |
| } |
| int layout = data.layout; |
| if (layout != 0) OS.ATSUDisposeTextLayout(layout); |
| int atsuiStyle = data.atsuiStyle; |
| if (atsuiStyle != 0) OS.ATSUDisposeStyle(atsuiStyle); |
| |
| /* Dispose the GC */ |
| drawable.internal_dispose_GC(handle, data); |
| |
| data.clipRgn = data.atsuiStyle = data.layout = 0; |
| drawable = null; |
| data.image = null; |
| data = null; |
| handle = 0; |
| } |
| |
| /** |
| * Draws the outline of a circular or elliptical arc |
| * within the specified rectangular area. |
| * <p> |
| * The resulting arc begins at <code>startAngle</code> and extends |
| * for <code>arcAngle</code> degrees, using the current color. |
| * 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 to be drawn |
| * @param y the y coordinate of the upper-left corner of the arc to be drawn |
| * @param width the width of the arc to be drawn |
| * @param height the height of the arc to be drawn |
| * @param startAngle the beginning angle |
| * @param arcAngle the angular extent of the arc, relative to the start angle |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if any of the width, height or endAngle is zero.</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawArc(int x, int y, int width, int height, int startAngle, int endAngle) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0) { |
| x = x + width; |
| width = -width; |
| } |
| if (height < 0) { |
| y = y + height; |
| height = -height; |
| } |
| if (width == 0 || height == 0 || endAngle == 0) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextSaveGState(handle); |
| OS.CGContextTranslateCTM(handle, x + 0.5f + width / 2f, y + 0.5f + height / 2f); |
| OS.CGContextScaleCTM(handle, width / 2f, height / 2f); |
| OS.CGContextAddArc(handle, 0, 0, 1, -startAngle * (float)Math.PI / 180, -endAngle * (float)Math.PI / 180, true); |
| OS.CGContextRestoreGState(handle); |
| OS.CGContextStrokePath(handle); |
| } |
| |
| /** |
| * Draws a rectangle, based on the specified arguments, which has |
| * the appearance of the platform's <em>focus rectangle</em> if the |
| * platform supports such a notion, and otherwise draws a simple |
| * rectangle in the receiver's foreground color. |
| * |
| * @param x the x coordinate of the rectangle |
| * @param y the y coordinate of the rectangle |
| * @param width the width of the rectangle |
| * @param height the height of the rectangle |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawRectangle |
| */ |
| public void drawFocus(int x, int y, int width, int height) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| //NOT DONE |
| // drawRectangle (x, y, width - 1, height - 1); |
| } |
| |
| /** |
| * Draws the given image in the receiver at the specified |
| * coordinates. |
| * |
| * @param image the image to draw |
| * @param x the x coordinate of where to draw |
| * @param y the y coordinate of where to draw |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the image is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the given coordinates are outside the bounds of the image</li> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawImage(Image image, int x, int y) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| drawImage(image, 0, 0, -1, -1, x, y, -1, -1, true); |
| } |
| |
| /** |
| * Copies a rectangular area from the source image into a (potentially |
| * different sized) rectangular area in the receiver. If the source |
| * and destination areas are of differing sizes, then the source |
| * area will be stretched or shrunk to fit the destination area |
| * as it is copied. The copy fails if any part of the source rectangle |
| * lies outside the bounds of the source image, or if any of the width |
| * or height arguments are negative. |
| * |
| * @param image the source image |
| * @param srcX the x coordinate in the source image to copy from |
| * @param srcY the y coordinate in the source image to copy from |
| * @param srcWidth the width in pixels to copy from the source |
| * @param srcHeight the height in pixels to copy from the source |
| * @param destX the x coordinate in the destination to copy to |
| * @param destY the y coordinate in the destination to copy to |
| * @param destWidth the width in pixels of the destination rectangle |
| * @param destHeight the height in pixels of the destination rectangle |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the image is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> |
| * <li>ERROR_INVALID_ARGUMENT - if any of the width or height arguments are negative. |
| * <li>ERROR_INVALID_ARGUMENT - if the source rectangle is not contained within the bounds of the source image</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawImage(Image image, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (srcWidth == 0 || srcHeight == 0 || destWidth == 0 || destHeight == 0) return; |
| if (srcX < 0 || srcY < 0 || srcWidth < 0 || srcHeight < 0 || destWidth < 0 || destHeight < 0) { |
| SWT.error (SWT.ERROR_INVALID_ARGUMENT); |
| } |
| if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| drawImage(image, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false); |
| } |
| |
| void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple) { |
| int imageHandle = srcImage.handle; |
| int imgWidth = OS.CGImageGetWidth(imageHandle); |
| int imgHeight = OS.CGImageGetHeight(imageHandle); |
| if (simple) { |
| srcWidth = destWidth = imgWidth; |
| srcHeight = destHeight = imgHeight; |
| } else { |
| simple = srcX == 0 && srcY == 0 && |
| srcWidth == destWidth && destWidth == imgWidth && |
| srcHeight == destHeight && destHeight == imgHeight; |
| if (srcX + srcWidth > imgWidth || srcY + srcHeight > imgHeight) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| } |
| OS.CGContextSaveGState(handle); |
| OS.CGContextScaleCTM(handle, 1, -1); |
| OS.CGContextTranslateCTM(handle, 0, -(destHeight + 2 * destY)); |
| CGRect rect = new CGRect(); |
| rect.x = destX; |
| rect.y = destY; |
| rect.width = destWidth; |
| rect.height = destHeight; |
| if (simple) { |
| OS.CGContextDrawImage(handle, rect, imageHandle); |
| } else { |
| int width = OS.CGImageGetWidth(imageHandle); |
| int height = OS.CGImageGetHeight(imageHandle); |
| int bpc = OS.CGImageGetBitsPerComponent(imageHandle); |
| int bpp = OS.CGImageGetBitsPerPixel(imageHandle); |
| int bpr = OS.CGImageGetBytesPerRow(imageHandle); |
| int colorspace = OS.CGImageGetColorSpace(imageHandle); |
| int alphaInfo = OS.CGImageGetAlphaInfo(imageHandle); |
| int data = srcImage.data + (srcY * bpr) + srcX * 4; |
| int provider = OS.CGDataProviderCreateWithData(0, data, srcHeight * bpr, 0); |
| if (provider == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int subImage = OS.CGImageCreate(srcWidth, srcHeight, bpc, bpp, bpr, colorspace, alphaInfo, provider, null, false, 0); |
| OS.CGDataProviderRelease(provider); |
| if (subImage == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| OS.CGContextDrawImage(handle, rect, subImage); |
| OS.CGImageRelease(subImage); |
| } |
| OS.CGContextRestoreGState(handle); |
| } |
| |
| /** |
| * Draws a line, using the foreground color, between the points |
| * (<code>x1</code>, <code>y1</code>) and (<code>x2</code>, <code>y2</code>). |
| * |
| * @param x1 the first point's x coordinate |
| * @param y1 the first point's y coordinate |
| * @param x2 the second point's x coordinate |
| * @param y2 the second point's y coordinate |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawLine(int x1, int y1, int x2, int y2) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| /* |
| * Feature in Quartz. Drawing a one-pixel line produces no output. The |
| * fix is to fill a one-pixel rectangle instead. |
| */ |
| if (x1 == x2 && y1 == y2) { |
| CGRect rect = new CGRect(); |
| rect.x = x1; |
| rect.y = y1; |
| rect.width = 1; |
| rect.height = 1; |
| OS.CGContextSetFillColor(handle, data.foreground); |
| OS.CGContextFillRect(handle, rect); |
| OS.CGContextSetFillColor(handle, data.background); |
| return; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextMoveToPoint(handle, x1+0.5f, y1+0.5f); |
| OS.CGContextAddLineToPoint(handle, x2+0.5f, y2+0.5f); |
| OS.CGContextStrokePath(handle); |
| } |
| |
| /** |
| * Draws the outline of an oval, using the foreground color, |
| * within the specified rectangular area. |
| * <p> |
| * The result is a circle or ellipse that fits within the |
| * rectangle specified by the <code>x</code>, <code>y</code>, |
| * <code>width</code>, and <code>height</code> arguments. |
| * </p><p> |
| * The oval covers an area that is <code>width + 1</code> |
| * pixels wide and <code>height + 1</code> pixels tall. |
| * </p> |
| * |
| * @param x the x coordinate of the upper left corner of the oval to be drawn |
| * @param y the y coordinate of the upper left corner of the oval to be drawn |
| * @param width the width of the oval to be drawn |
| * @param height the height of the oval to be drawn |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawOval(int x, int y, int width, int height) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0) { |
| x = x + width; |
| width = -width; |
| } |
| if (height < 0) { |
| y = y + height; |
| height = -height; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextSaveGState(handle); |
| OS.CGContextTranslateCTM(handle, x + 0.5f + width / 2f, y + 0.5f + height / 2f); |
| OS.CGContextScaleCTM(handle, width / 2f, height / 2f); |
| OS.CGContextMoveToPoint(handle, 1, 0); |
| OS.CGContextAddArc(handle, 0, 0, 1, 0, (float)(2 *Math.PI), true); |
| OS.CGContextRestoreGState(handle); |
| OS.CGContextStrokePath(handle); |
| } |
| |
| /** |
| * Draws the closed polygon which is defined by the specified array |
| * of integer coordinates, using the receiver's foreground color. The array |
| * contains alternating x and y values which are considered to represent |
| * points which are the vertices of the polygon. Lines are drawn between |
| * each consecutive pair, and between the first pair and last pair in the |
| * array. |
| * |
| * @param pointArray an array of alternating x and y values which are the vertices of the polygon |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT if pointArray is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawPolygon(int[] pointArray) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| float[] points = new float[pointArray.length]; |
| for (int i=0; i<points.length; i++) { |
| points[i] = pointArray[i]; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextAddLines(handle, points, points.length / 2); |
| OS.CGContextClosePath(handle); |
| OS.CGContextStrokePath(handle); |
| } |
| |
| /** |
| * Draws the polyline which is defined by the specified array |
| * of integer coordinates, using the receiver's foreground color. The array |
| * contains alternating x and y values which are considered to represent |
| * points which are the corners of the polyline. Lines are drawn between |
| * each consecutive pair, but not between the first pair and last pair in |
| * the array. |
| * |
| * @param pointArray an array of alternating x and y values which are the corners of the polyline |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the point array is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawPolyline(int[] pointArray) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| float[] points = new float[pointArray.length]; |
| for (int i=0; i<points.length; i++) { |
| points[i] = pointArray[i]; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextAddLines(handle, points, points.length / 2); |
| OS.CGContextStrokePath(handle); |
| } |
| |
| /** |
| * Draws the outline of the rectangle specified by the arguments, |
| * using the receiver's foreground color. The left and right edges |
| * of the rectangle are at <code>x</code> and <code>x + width</code>. |
| * The top and bottom edges are at <code>y</code> and <code>y + height</code>. |
| * |
| * @param x the x coordinate of the rectangle to be drawn |
| * @param y the y coordinate of the rectangle to be drawn |
| * @param width the width of the rectangle to be drawn |
| * @param height the height of the rectangle to be drawn |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawRectangle(int x, int y, int width, int height) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0) { |
| x = x + width; |
| width = -width; |
| } |
| if (height < 0) { |
| y = y + height; |
| height = -height; |
| } |
| CGRect rect = new CGRect(); |
| rect.x = x + 0.5f; |
| rect.y = y + 0.5f; |
| rect.width = width; |
| rect.height = height; |
| OS.CGContextStrokeRect(handle, rect); |
| } |
| |
| /** |
| * Draws the outline of the specified rectangle, using the receiver's |
| * foreground color. The left and right edges of the rectangle are at |
| * <code>rect.x</code> and <code>rect.x + rect.width</code>. The top |
| * and bottom edges are at <code>rect.y</code> and |
| * <code>rect.y + rect.height</code>. |
| * |
| * @param rect the rectangle to draw |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawRectangle(Rectangle rect) { |
| if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| drawRectangle (rect.x, rect.y, rect.width, rect.height); |
| } |
| |
| /** |
| * Draws the outline of the round-cornered rectangle specified by |
| * the arguments, using the receiver's foreground color. The left and |
| * right edges of the rectangle are at <code>x</code> and <code>x + width</code>. |
| * The top and bottom edges are at <code>y</code> and <code>y + height</code>. |
| * The <em>roundness</em> of the corners is specified by the |
| * <code>arcWidth</code> and <code>arcHeight</code> arguments. |
| * |
| * @param x the x coordinate of the rectangle to be drawn |
| * @param y the y coordinate of the rectangle to be drawn |
| * @param width the width of the rectangle to be drawn |
| * @param height the height of the rectangle to be drawn |
| * @param arcWidth the horizontal diameter of the arc at the four corners |
| * @param arcHeight the vertical diameter of the arc at the four corners |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawRoundRectangle(int x, int y, int width, int height, int arcWidth, int arcHeight) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (arcWidth == 0 || arcHeight == 0) { |
| drawRectangle(x, y, width, height); |
| return; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextSaveGState(handle); |
| OS.CGContextTranslateCTM(handle, x, y); |
| OS.CGContextScaleCTM(handle, arcWidth, arcHeight); |
| float fw = width / (float)arcWidth; |
| float fh = height / (float)arcHeight; |
| OS.CGContextMoveToPoint(handle, fw, fh/2); |
| OS.CGContextAddArcToPoint(handle, fw, fh, fw/2, fh, 1); |
| OS.CGContextAddArcToPoint(handle, 0, fh, 0, fh/2, 1); |
| OS.CGContextAddArcToPoint(handle, 0, 0, fw/2, 0, 1); |
| OS.CGContextAddArcToPoint(handle, fw, 0, fw, fh/2, 1); |
| OS.CGContextClosePath(handle); |
| OS.CGContextRestoreGState(handle); |
| OS.CGContextStrokePath(handle); |
| } |
| |
| /** |
| * Draws the given string, using the receiver's current font and |
| * foreground color. No tab expansion or carriage return processing |
| * will be performed. The background of the rectangular area where |
| * the string is being drawn will be filled with the receiver's |
| * background color. |
| * |
| * @param string the string to be drawn |
| * @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn |
| * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawString (String string, int x, int y) { |
| drawString(string, x, y, false); |
| } |
| |
| /** |
| * Draws the given string, using the receiver's current font and |
| * foreground color. No tab expansion or carriage return processing |
| * will be performed. If <code>isTransparent</code> is <code>true</code>, |
| * then the background of the rectangular area where the string is being |
| * drawn will not be modified, otherwise it will be filled with the |
| * receiver's background color. |
| * |
| * @param string the string to be drawn |
| * @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn |
| * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn |
| * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawString(String string, int x, int y, boolean isTransparent) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| int length = string.length(); |
| if (length == 0) return; |
| OS.CGContextSaveGState(handle); |
| OS.CGContextScaleCTM(handle, 1, -1); |
| OS.CGContextTranslateCTM(handle, 0, -data.fontAscent); |
| OS.CGContextSetFillColor(handle, data.foreground); |
| char[] buffer = new char[length]; |
| string.getChars(0, length, buffer, 0); |
| int ptr = OS.NewPtr(length * 2); |
| OS.memcpy(ptr, buffer, length * 2); |
| OS.ATSUSetTextPointerLocation(data.layout, ptr, 0, length, length); |
| Font font = data.font; |
| int atsuiStyle = font.atsuiStyle != 0 ? font.atsuiStyle : data.atsuiStyle; |
| OS.ATSUSetRunStyle(data.layout, atsuiStyle, 0, length); |
| OS.ATSUDrawText(data.layout, 0, length, x << 16, -y << 16); |
| OS.DisposePtr(ptr); |
| OS.CGContextRestoreGState(handle); |
| } |
| |
| /** |
| * Draws the given string, using the receiver's current font and |
| * foreground color. Tab expansion and carriage return processing |
| * are performed. The background of the rectangular area where |
| * the text is being drawn will be filled with the receiver's |
| * background color. |
| * |
| * @param string the string to be drawn |
| * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn |
| * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawText(String string, int x, int y) { |
| drawText(string, x, y, SWT.DRAW_DELIMITER | SWT.DRAW_TAB); |
| } |
| |
| /** |
| * Draws the given string, using the receiver's current font and |
| * foreground color. Tab expansion and carriage return processing |
| * are performed. If <code>isTransparent</code> is <code>true</code>, |
| * then the background of the rectangular area where the text is being |
| * drawn will not be modified, otherwise it will be filled with the |
| * receiver's background color. |
| * |
| * @param string the string to be drawn |
| * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn |
| * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn |
| * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawText(String string, int x, int y, boolean isTransparent) { |
| int flags = SWT.DRAW_DELIMITER | SWT.DRAW_TAB; |
| if (isTransparent) flags |= SWT.DRAW_TRANSPARENT; |
| drawText(string, x, y, flags); |
| } |
| |
| /** |
| * Draws the given string, using the receiver's current font and |
| * foreground color. Tab expansion, line delimiter and mnemonic |
| * processing are performed according to the specified flags. If |
| * <code>flags</code> includes <code>DRAW_TRANSPARENT</code>, |
| * then the background of the rectangular area where the text is being |
| * drawn will not be modified, otherwise it will be filled with the |
| * receiver's background color. |
| * <p> |
| * The parameter <code>flags</code> may be a combination of: |
| * <dl> |
| * <dt><b>DRAW_DELIMITER</b></dt> |
| * <dd>draw multiple lines</dd> |
| * <dt><b>DRAW_TAB</b></dt> |
| * <dd>expand tabs</dd> |
| * <dt><b>DRAW_MNEMONIC</b></dt> |
| * <dd>underline the mnemonic character</dd> |
| * <dt><b>DRAW_TRANSPARENT</b></dt> |
| * <dd>transparent background</dd> |
| * </dl> |
| * </p> |
| * |
| * @param string the string to be drawn |
| * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn |
| * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn |
| * @param flags the flags specifing how to process the text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void drawText (String string, int x, int y, int flags) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| //NOT DONE |
| drawString(string, x, y); |
| } |
| |
| /** |
| * 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 boolean equals(Object object) { |
| if (object == this) return true; |
| if (!(object instanceof GC)) return false; |
| return handle == ((GC)object).handle; |
| } |
| |
| /** |
| * Fills the interior of a circular or elliptical arc within |
| * the specified rectangular area, with the receiver's background |
| * color. |
| * <p> |
| * The resulting arc begins at <code>startAngle</code> and extends |
| * for <code>arcAngle</code> degrees, using the current color. |
| * 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 to be filled |
| * @param y the y coordinate of the upper-left corner of the arc to be filled |
| * @param width the width of the arc to be filled |
| * @param height the height of the arc to be filled |
| * @param startAngle the beginning angle |
| * @param arcAngle the angular extent of the arc, relative to the start angle |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if any of the width, height or endAngle is zero.</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawArc |
| */ |
| public void fillArc(int x, int y, int width, int height, int startAngle, int endAngle) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0) { |
| x = x + width; |
| width = -width; |
| } |
| if (height < 0) { |
| y = y + height; |
| height = -height; |
| } |
| if (width == 0 || height == 0 || endAngle == 0) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextSaveGState(handle); |
| OS.CGContextTranslateCTM(handle, x + width / 2f, y + height / 2f); |
| OS.CGContextScaleCTM(handle, width / 2f, height / 2f); |
| OS.CGContextMoveToPoint(handle, 0, 0); |
| OS.CGContextAddArc(handle, 0, 0, 1, -startAngle * (float)Math.PI / 180, -endAngle * (float)Math.PI / 180, true); |
| OS.CGContextClosePath(handle); |
| OS.CGContextRestoreGState(handle); |
| OS.CGContextFillPath(handle); |
| } |
| |
| /** |
| * Fills the interior of the specified rectangle with a gradient |
| * sweeping from left to right or top to bottom progressing |
| * from the receiver's foreground color to its background color. |
| * |
| * @param x the x coordinate of the rectangle to be filled |
| * @param y the y coordinate of the rectangle to be filled |
| * @param width the width of the rectangle to be filled, may be negative |
| * (inverts direction of gradient if horizontal) |
| * @param height the height of the rectangle to be filled, may be negative |
| * (inverts direction of gradient if vertical) |
| * @param vertical if true sweeps from top to bottom, else |
| * sweeps from left to right |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawRectangle |
| */ |
| public void fillGradientRectangle(int x, int y, int width, int height, boolean vertical) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if ((width == 0) || (height == 0)) return; |
| |
| /* Rewrite this to use GdkPixbuf */ |
| |
| RGB backgroundRGB, foregroundRGB; |
| backgroundRGB = getBackground().getRGB(); |
| foregroundRGB = getForeground().getRGB(); |
| |
| RGB fromRGB, toRGB; |
| fromRGB = foregroundRGB; |
| toRGB = backgroundRGB; |
| boolean swapColors = false; |
| if (width < 0) { |
| x += width; width = -width; |
| if (! vertical) swapColors = true; |
| } |
| if (height < 0) { |
| y += height; height = -height; |
| if (vertical) swapColors = true; |
| } |
| if (swapColors) { |
| fromRGB = backgroundRGB; |
| toRGB = foregroundRGB; |
| } |
| if (fromRGB == toRGB) { |
| fillRectangle(x, y, width, height); |
| return; |
| } |
| ImageData.fillGradientRectangle(this, data.device, |
| x, y, width, height, vertical, fromRGB, toRGB, |
| 8, 8, 8); |
| } |
| |
| /** |
| * Fills the interior of an oval, within the specified |
| * rectangular area, with the receiver's background |
| * color. |
| * |
| * @param x the x coordinate of the upper left corner of the oval to be filled |
| * @param y the y coordinate of the upper left corner of the oval to be filled |
| * @param width the width of the oval to be filled |
| * @param height the height of the oval to be filled |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawOval |
| */ |
| public void fillOval(int x, int y, int width, int height) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0) { |
| x = x + width; |
| width = -width; |
| } |
| if (height < 0) { |
| y = y + height; |
| height = -height; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextSaveGState(handle); |
| OS.CGContextTranslateCTM(handle, x + width / 2f, y + height / 2f); |
| OS.CGContextScaleCTM(handle, width / 2f, height / 2f); |
| OS.CGContextMoveToPoint(handle, 1, 0); |
| OS.CGContextAddArc(handle, 0, 0, 1, 0, (float)(Math.PI * 2), false); |
| OS.CGContextClosePath(handle); |
| OS.CGContextRestoreGState(handle); |
| OS.CGContextFillPath(handle); |
| } |
| |
| /** |
| * Fills the interior of the closed polygon which is defined by the |
| * specified array of integer coordinates, using the receiver's |
| * background color. The array contains alternating x and y values |
| * which are considered to represent points which are the vertices of |
| * the polygon. Lines are drawn between each consecutive pair, and |
| * between the first pair and last pair in the array. |
| * |
| * @param pointArray an array of alternating x and y values which are the vertices of the polygon |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT if pointArray is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawPolygon |
| */ |
| public void fillPolygon(int[] pointArray) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| float[] points = new float[pointArray.length]; |
| for (int i=0; i<points.length; i++) { |
| points[i] = pointArray[i]; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextAddLines(handle, points, points.length / 2); |
| OS.CGContextClosePath(handle); |
| OS.CGContextFillPath(handle); |
| } |
| |
| /** |
| * Fills the interior of the rectangle specified by the arguments, |
| * using the receiver's background color. |
| * |
| * @param x the x coordinate of the rectangle to be filled |
| * @param y the y coordinate of the rectangle to be filled |
| * @param width the width of the rectangle to be filled |
| * @param height the height of the rectangle to be filled |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawRectangle |
| */ |
| public void fillRectangle(int x, int y, int width, int height) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0) { |
| x = x + width; |
| width = -width; |
| } |
| if (height < 0) { |
| y = y + height; |
| height = -height; |
| } |
| CGRect rect = new CGRect(); |
| rect.x = x; |
| rect.y = y; |
| rect.width = width; |
| rect.height = height; |
| OS.CGContextFillRect(handle, rect); |
| } |
| |
| /** |
| * Fills the interior of the specified rectangle, using the receiver's |
| * background color. |
| * |
| * @param rectangle the rectangle to be filled |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawRectangle |
| */ |
| public void fillRectangle(Rectangle rect) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| fillRectangle(rect.x, rect.y, rect.width, rect.height); |
| } |
| |
| /** |
| * Fills the interior of the round-cornered rectangle specified by |
| * the arguments, using the receiver's background color. |
| * |
| * @param x the x coordinate of the rectangle to be filled |
| * @param y the y coordinate of the rectangle to be filled |
| * @param width the width of the rectangle to be filled |
| * @param height the height of the rectangle to be filled |
| * @param arcWidth the horizontal diameter of the arc at the four corners |
| * @param arcHeight the vertical diameter of the arc at the four corners |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #drawRoundRectangle |
| */ |
| public void fillRoundRectangle(int x, int y, int width, int height, int arcWidth, int arcHeight) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (arcWidth == 0 || arcHeight == 0) { |
| fillRectangle(x, y, width, height); |
| return; |
| } |
| OS.CGContextBeginPath(handle); |
| OS.CGContextSaveGState(handle); |
| OS.CGContextTranslateCTM(handle, x, y); |
| OS.CGContextScaleCTM(handle, arcWidth, arcHeight); |
| float fw = width / (float)arcWidth; |
| float fh = height / (float)arcHeight; |
| OS.CGContextMoveToPoint(handle, fw, fh/2); |
| OS.CGContextAddArcToPoint(handle, fw, fh, fw/2, fh, 1); |
| OS.CGContextAddArcToPoint(handle, 0, fh, 0, fh/2, 1); |
| OS.CGContextAddArcToPoint(handle, 0, 0, fw/2, 0, 1); |
| OS.CGContextAddArcToPoint(handle, fw, 0, fw, fh/2, 1); |
| OS.CGContextClosePath(handle); |
| OS.CGContextRestoreGState(handle); |
| OS.CGContextFillPath(handle); |
| } |
| |
| /** |
| * Returns the <em>advance width</em> of the specified character in |
| * the font which is currently selected into the receiver. |
| * <p> |
| * The advance width is defined as the horizontal distance the cursor |
| * should move after printing the character in the selected font. |
| * </p> |
| * |
| * @param ch the character to measure |
| * @return the distance in the x direction to move past the character before painting the next |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public int getAdvanceWidth(char ch) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| //NOT DONE |
| return stringExtent(new String(new char[]{ch})).x; |
| } |
| |
| /** |
| * Returns the background color. |
| * |
| * @return the receiver's background color |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Color getBackground() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return Color.carbon_new (data.device, data.background); |
| } |
| |
| /** |
| * Returns the width of the specified character in the font |
| * selected into the receiver. |
| * <p> |
| * The width is defined as the space taken up by the actual |
| * character, not including the leading and tailing whitespace |
| * or overhang. |
| * </p> |
| * |
| * @param ch the character to measure |
| * @return the width of the character |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public int getCharWidth(char ch) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| //NOT DONE |
| return stringExtent(new String(new char[]{ch})).x; |
| } |
| |
| /** |
| * Returns the bounding rectangle of the receiver's clipping |
| * region. If no clipping region is set, the return value |
| * will be a rectangle which covers the entire bounds of the |
| * object the receiver is drawing on. |
| * |
| * @return the bounding rectangle of the clipping region |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Rectangle getClipping() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (data.clipRgn == 0) { |
| int width = 0, height = 0; |
| if (data.control != 0) { |
| Rect bounds = new Rect(); |
| OS.GetControlBounds(data.control, bounds); |
| width = bounds.right - bounds.left; |
| height = bounds.bottom - bounds.top; |
| } |
| if (data.image != null) { |
| int image = data.image.handle; |
| width = OS.CGImageGetWidth(image); |
| height = OS.CGImageGetHeight(image); |
| } |
| return new Rectangle(0, 0, width, height); |
| } |
| Rect bounds = new Rect(); |
| OS.GetRegionBounds(data.clipRgn, bounds); |
| int width = bounds.right - bounds.left; |
| int height = bounds.bottom - bounds.top; |
| return new Rectangle(bounds.left, bounds.top, width, height); |
| } |
| |
| /** |
| * Sets the region managed by the argument to the current |
| * clipping region of the receiver. |
| * |
| * @param region the region to fill with the clipping region |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the region is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void getClipping(Region region) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (region == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (data.clipRgn == 0) { |
| int width = 0, height = 0; |
| if (data.control != 0) { |
| Rect bounds = new Rect(); |
| OS.GetControlBounds(data.control, bounds); |
| width = bounds.right - bounds.left; |
| height = bounds.bottom - bounds.top; |
| } |
| if (data.image != null) { |
| int image = data.image.handle; |
| width = OS.CGImageGetWidth(image); |
| height = OS.CGImageGetHeight(image); |
| } |
| OS.SetRectRgn(region.handle, (short) 0, (short) 0, (short) width, (short) height); |
| return; |
| } |
| OS.CopyRgn(data.clipRgn, region.handle); |
| } |
| |
| /** |
| * Returns the font currently being used by the receiver |
| * to draw and measure text. |
| * |
| * @return the receiver's font |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Font getFont() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return data.font; |
| } |
| |
| /** |
| * Returns a FontMetrics which contains information |
| * about the font currently being used by the receiver |
| * to draw and measure text. |
| * |
| * @return font metrics for the receiver's font |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public FontMetrics getFontMetrics() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| Font font = data.font; |
| FontInfo info = new FontInfo(); |
| OS.FetchFontInfo(font.id, font.size, font.style, info); |
| FontMetrics fm = new FontMetrics(); |
| fm.ascent = info.ascent; |
| fm.descent = info.descent; |
| fm.leading = info.leading; |
| /* This code is intentionaly comment. Not right for fixed width fonts. */ |
| //fm.averageCharWidth = info.widMax / 3; |
| String s = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; |
| fm.averageCharWidth = stringExtent(s).x / s.length(); |
| fm.height = fm.ascent + fm.descent; |
| return fm; |
| } |
| |
| /** |
| * Returns the receiver's foreground color. |
| * |
| * @return the color used for drawing foreground things |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Color getForeground() { |
| if (handle == 0) SWT.error(SWT.ERROR_WIDGET_DISPOSED); |
| return Color.carbon_new(data.device, data.foreground); |
| } |
| |
| /** |
| * Returns the receiver's line style, which will be one |
| * of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>, |
| * <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or |
| * <code>SWT.LINE_DASHDOTDOT</code>. |
| * |
| * @return the style used for drawing lines |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public int getLineStyle() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return data.lineStyle; |
| } |
| |
| /** |
| * Returns the width that will be used when drawing lines |
| * for all of the figure drawing operations (that is, |
| * <code>drawLine</code>, <code>drawRectangle</code>, |
| * <code>drawPolyline</code>, and so forth. |
| * |
| * @return the receiver's line width |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public int getLineWidth() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return data.lineWidth; |
| } |
| |
| /** |
| * Returns <code>true</code> if this GC is drawing in the mode |
| * where the resulting color in the destination is the |
| * <em>exclusive or</em> of the color values in the source |
| * and the destination, and <code>false</code> if it is |
| * drawing in the mode where the destination color is being |
| * replaced with the source color value. |
| * |
| * @return <code>true</code> true if the receiver is in XOR mode, and false otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean getXORMode() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return data.xorMode; |
| } |
| |
| /** |
| * Returns an integer hash code for the receiver. Any two |
| * objects which return <code>true</code> when passed to |
| * <code>equals</code> must return the same value for this |
| * method. |
| * |
| * @return the receiver's hash |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #equals |
| */ |
| public int hashCode() { |
| return handle; |
| } |
| |
| void init(Drawable drawable, GCData data, int context) { |
| int colorspace = data.device.colorspace; |
| OS.CGContextSetStrokeColorSpace(context, colorspace); |
| OS.CGContextSetFillColorSpace(context, colorspace); |
| float[] foreground = data.foreground; |
| if (foreground != null) OS.CGContextSetStrokeColor(context, foreground); |
| float[] background = data.background; |
| if (background != null) OS.CGContextSetFillColor(context, background); |
| |
| int[] buffer = new int[1]; |
| OS.ATSUCreateTextLayout(buffer); |
| if (buffer[0] == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| data.layout = buffer[0]; |
| |
| int ptr = OS.NewPtr(4); |
| buffer[0] = context; |
| OS.memcpy(ptr, buffer, 4); |
| int[] tags = new int[]{OS.kATSUCGContextTag}; |
| int[] sizes = new int[]{4}; |
| int[] values = new int[]{ptr}; |
| OS.ATSUSetLayoutControls(data.layout, tags.length, tags, sizes, values); |
| OS.DisposePtr(ptr); |
| |
| Image image = data.image; |
| if (image != null) image.memGC = this; |
| this.drawable = drawable; |
| this.data = data; |
| handle = context; |
| |
| if (data.font != null) setGCFont(); |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver has a clipping |
| * region set into it, and <code>false</code> otherwise. |
| * If this method returns false, the receiver will draw on all |
| * available space in the destination. If it returns true, |
| * it will draw only in the area that is covered by the region |
| * that can be accessed with <code>getClipping(region)</code>. |
| * |
| * @return <code>true</code> if the GC has a clipping region, and <code>false</code> otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean isClipped() { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return data.clipRgn != 0; |
| } |
| |
| /** |
| * Returns <code>true</code> if the GC has been disposed, |
| * and <code>false</code> otherwise. |
| * <p> |
| * This method gets the dispose state for the GC. |
| * When a GC has been disposed, it is an error to |
| * invoke any other method using the GC. |
| * |
| * @return <code>true</code> when the GC is disposed and <code>false</code> otherwise |
| */ |
| public boolean isDisposed() { |
| return handle == 0; |
| } |
| |
| /** |
| * Sets the background color. The background color is used |
| * for fill operations and as the background color when text |
| * is drawn. |
| * |
| * @param color the new background color for the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the color is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setBackground(Color color) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| data.background = color.handle; |
| OS.CGContextSetFillColor(handle, color.handle); |
| } |
| |
| /** |
| * Sets the area of the receiver which can be changed |
| * by drawing operations to the rectangular area specified |
| * by the arguments. |
| * |
| * @param x the x coordinate of the clipping rectangle |
| * @param y the y coordinate of the clipping rectangle |
| * @param width the width of the clipping rectangle |
| * @param height the height of the clipping rectangle |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setClipping(int x, int y, int width, int height) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (data.clipRgn == 0) data.clipRgn = OS.NewRgn(); |
| OS.SetRectRgn(data.clipRgn, (short)x, (short)y, (short)(x + width), (short)(y + height)); |
| setCGClipping(); |
| } |
| |
| /** |
| * Sets the area of the receiver which can be changed |
| * by drawing operations to the rectangular area specified |
| * by the argument. |
| * |
| * @param rect the clipping rectangle |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setClipping(Rectangle r) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (r == null) { |
| if (data.clipRgn != 0) { |
| OS.DisposeRgn(data.clipRgn); |
| data.clipRgn = 0; |
| } else { |
| return; |
| } |
| } else { |
| if (data.clipRgn == 0) data.clipRgn = OS.NewRgn(); |
| OS.SetRectRgn(data.clipRgn, (short)r.x, (short)r.y, (short)(r.x + r.width), (short)(r.y + r.height)); |
| } |
| setCGClipping(); |
| } |
| |
| /** |
| * Sets the area of the receiver which can be changed |
| * by drawing operations to the region specified |
| * by the argument. |
| * |
| * @param rect the clipping region. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setClipping(Region region) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (region == null) { |
| if (data.clipRgn != 0) { |
| OS.DisposeRgn(data.clipRgn); |
| data.clipRgn = 0; |
| } else { |
| return; |
| } |
| } else { |
| if (data.clipRgn == 0) data.clipRgn = OS.NewRgn(); |
| OS.CopyRgn(region.handle, data.clipRgn); |
| } |
| setCGClipping(); |
| } |
| |
| void setCGClipping () { |
| if (data.control == 0) { |
| OS.CGContextScaleCTM(handle, 1, -1); |
| if (data.clipRgn != 0) { |
| OS.ClipCGContextToRegion(handle, new Rect(), data.clipRgn); |
| } else { |
| int rgn = OS.NewRgn(); |
| OS.SetRectRgn(rgn, (short)-32768, (short)-32768, (short)32767, (short)32767); |
| OS.ClipCGContextToRegion(handle, new Rect(), rgn); |
| OS.DisposeRgn(rgn); |
| } |
| OS.CGContextScaleCTM(handle, 1, -1); |
| return; |
| } |
| int window = OS.GetControlOwner(data.control); |
| int port = OS.GetWindowPort(window); |
| Rect rect = new Rect(); |
| OS.GetControlBounds(data.control, rect); |
| Rect portRect = new Rect(); |
| OS.GetPortBounds(port, portRect); |
| int portHeight = portRect.bottom - portRect.top; |
| OS.CGContextTranslateCTM(handle, -rect.left, portHeight - rect.top); |
| OS.CGContextScaleCTM(handle, 1, -1); |
| if (data.clipRgn != 0) { |
| int rgn = OS.NewRgn(); |
| OS.CopyRgn(data.clipRgn, rgn); |
| OS.OffsetRgn(rgn, rect.left, rect.top); |
| OS.SectRgn(data.visibleRgn, rgn, rgn); |
| OS.ClipCGContextToRegion(handle, portRect, rgn); |
| OS.DisposeRgn(rgn); |
| } else { |
| OS.ClipCGContextToRegion(handle, portRect, data.visibleRgn); |
| } |
| OS.CGContextScaleCTM(handle, 1, -1); |
| OS.CGContextTranslateCTM(handle, rect.left, -portHeight + rect.top); |
| } |
| |
| /** |
| * Sets the font which will be used by the receiver |
| * to draw and measure text to the argument. If the |
| * argument is null, then a default font appropriate |
| * for the platform will be used instead. |
| * |
| * @param font the new font for the receiver, or null to indicate a default font |
| * |
| * @exception IllegalArgumentException <ul> |
| * <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 setFont(Font font) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (font == null) font = data.device.systemFont; |
| if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| data.font = font; |
| setGCFont (); |
| } |
| |
| void setGCFont() { |
| Font font = data.font; |
| FontInfo info = new FontInfo(); |
| OS.FetchFontInfo(font.id, font.size, font.style, info); |
| data.fontAscent = info.ascent; |
| data.fontDescent = info.descent; |
| if (font.atsuiStyle == 0) { |
| if (data.atsuiStyle != 0) OS.ATSUDisposeStyle(data.atsuiStyle); |
| data.atsuiStyle = font.createStyle(); |
| } |
| } |
| |
| /** |
| * Sets the foreground color. The foreground color is used |
| * for drawing operations including when text is drawn. |
| * |
| * @param color the new foreground color for the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the color is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setForeground(Color color) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| data.foreground = color.handle; |
| OS.CGContextSetStrokeColor(handle, color.handle); |
| } |
| |
| /** |
| * Sets the receiver's line style to the argument, which must be one |
| * of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>, |
| * <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or |
| * <code>SWT.LINE_DASHDOTDOT</code>. |
| * |
| * @param lineStyle the style to be used for drawing lines |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setLineStyle(int lineStyle) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| switch (lineStyle) { |
| case SWT.LINE_SOLID: |
| OS.CGContextSetLineDash(handle, 0, null, 0); |
| break; |
| case SWT.LINE_DASH: |
| OS.CGContextSetLineDash(handle, 0, new float[]{18, 6}, 2); |
| break; |
| case SWT.LINE_DOT: |
| OS.CGContextSetLineDash(handle, 0, new float[]{3, 3}, 2); |
| break; |
| case SWT.LINE_DASHDOT: |
| OS.CGContextSetLineDash(handle, 0, new float[]{9, 6, 3, 6}, 4); |
| break; |
| case SWT.LINE_DASHDOTDOT: |
| OS.CGContextSetLineDash(handle, 0, new float[]{9, 3, 3, 3, 3, 3}, 6); |
| break; |
| default: |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| data.lineStyle = lineStyle; |
| } |
| |
| /** |
| * Sets the width that will be used when drawing lines |
| * for all of the figure drawing operations (that is, |
| * <code>drawLine</code>, <code>drawRectangle</code>, |
| * <code>drawPolyline</code>, and so forth. |
| * |
| * @param lineWidth the width of a line |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setLineWidth(int width) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| data.lineWidth = width; |
| OS.CGContextSetLineWidth(handle, width); |
| } |
| |
| /** |
| * If the argument is <code>true</code>, puts the receiver |
| * in a drawing mode where the resulting color in the destination |
| * is the <em>exclusive or</em> of the color values in the source |
| * and the destination, and if the argument is <code>false</code>, |
| * puts the receiver in a drawing mode where the destination color |
| * is replaced with the source color value. |
| * |
| * @param xor if <code>true</code>, then <em>xor</em> mode is used, otherwise <em>source copy</em> mode is used |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setXORMode(boolean xor) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| //NOT DONE |
| data.xorMode = xor; |
| } |
| |
| /** |
| * Returns the extent of the given string. No tab |
| * expansion or carriage return processing will be performed. |
| * <p> |
| * The <em>extent</em> of a string is the width and height of |
| * the rectangular area it would cover if drawn in a particular |
| * font (in this case, the current font in the receiver). |
| * </p> |
| * |
| * @param string the string to measure |
| * @return a point containing the extent of the string |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Point stringExtent(String string) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| int length = string.length(); |
| if (length == 0) return new Point(0, data.fontAscent + data.fontDescent); |
| char[] buffer = new char[length]; |
| string.getChars(0, length, buffer, 0); |
| int ptr1 = OS.NewPtr(length * 2); |
| OS.memcpy(ptr1, buffer, length * 2); |
| OS.ATSUSetTextPointerLocation(data.layout, ptr1, 0, length, length); |
| Font font = data.font; |
| int atsuiStyle = font.atsuiStyle != 0 ? font.atsuiStyle : data.atsuiStyle; |
| OS.ATSUSetRunStyle(data.layout, atsuiStyle, 0, length); |
| int ptr2 = OS.NewPtr(ATSTrapezoid.sizeof); |
| OS.ATSUGetGlyphBounds(data.layout, 0, 0, 0, length, (short)OS.kATSUseDeviceOrigins, 1, ptr2, null); |
| OS.DisposePtr(ptr1); |
| ATSTrapezoid trapezoid = new ATSTrapezoid(); |
| OS.memcpy(trapezoid, ptr2, ATSTrapezoid.sizeof); |
| OS.DisposePtr(ptr2); |
| int width = (trapezoid.upperRight_x >> 16) - (trapezoid.upperLeft_x >> 16); |
| int height = (trapezoid.lowerRight_y >> 16) - (trapezoid.upperRight_y >> 16); |
| return new Point(width, height); |
| } |
| |
| /** |
| * Returns the extent of the given string. Tab expansion and |
| * carriage return processing are performed. |
| * <p> |
| * The <em>extent</em> of a string is the width and height of |
| * the rectangular area it would cover if drawn in a particular |
| * font (in this case, the current font in the receiver). |
| * </p> |
| * |
| * @param string the string to measure |
| * @return a point containing the extent of the string |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Point textExtent(String string) { |
| return textExtent(string, SWT.DRAW_DELIMITER | SWT.DRAW_TAB); |
| } |
| |
| /** |
| * Returns the extent of the given string. Tab expansion, line |
| * delimiter and mnemonic processing are performed according to |
| * the specified flags, which can be a combination of: |
| * <dl> |
| * <dt><b>DRAW_DELIMITER</b></dt> |
| * <dd>draw multiple lines</dd> |
| * <dt><b>DRAW_TAB</b></dt> |
| * <dd>expand tabs</dd> |
| * <dt><b>DRAW_MNEMONIC</b></dt> |
| * <dd>underline the mnemonic character</dd> |
| * <dt><b>DRAW_TRANSPARENT</b></dt> |
| * <dd>transparent background</dd> |
| * </dl> |
| * <p> |
| * The <em>extent</em> of a string is the width and height of |
| * the rectangular area it would cover if drawn in a particular |
| * font (in this case, the current font in the receiver). |
| * </p> |
| * |
| * @param string the string to measure |
| * @param flags the flags specifing how to process the text |
| * @return a point containing the extent of the string |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Point textExtent(String string, int flags) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| //NOT DONE |
| return stringExtent(string); |
| } |
| |
| /** |
| * 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 "GC {*DISPOSED*}"; |
| return "GC {" + handle + "}"; |
| } |
| |
| } |