| 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.gtk.*; |
| import org.eclipse.swt.internal.*; |
| 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); |
| } |
| |
| /**
|
| * 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); |
| Rectangle rect = image.getBounds(); |
| int gdkGC = OS.gdk_gc_new(image.pixmap); |
| if (gdkGC == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| OS.gdk_gc_set_subwindow(gdkGC, OS.GDK_INCLUDE_INFERIORS); |
| OS.gdk_draw_drawable(image.pixmap, gdkGC, data.drawable, x, y, 0, 0, rect.width, rect.height); |
| OS.g_object_unref(gdkGC); |
| } |
| |
| /**
|
| * 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; |
| int drawable = data.drawable; |
| OS.gdk_gc_set_exposures(handle, true); |
| OS.gdk_draw_drawable(drawable, handle, drawable, srcX, srcY, destX, destY, width, height); |
| OS.gdk_gc_set_exposures(handle, false); |
| if (data.image != null) return; |
| boolean disjoint = (destX + width < srcX) || (srcX + width < destX) || (destY + height < srcY) || (srcY + height < destY); |
| GdkRectangle rect = new GdkRectangle (); |
| if (disjoint) { |
| rect.x = srcX; |
| rect.y = srcY; |
| rect.width = width; |
| rect.height = height; |
| OS.gdk_window_invalidate_rect (drawable, rect, false); |
| // OS.gdk_window_clear_area_e(drawable, srcX, srcY, width, height); |
| } else { |
| if (deltaX != 0) { |
| int newX = destX - deltaX; |
| if (deltaX < 0) newX = destX + width; |
| rect.x = newX; |
| rect.y = srcY; |
| rect.width = Math.abs(deltaX); |
| rect.height = height; |
| OS.gdk_window_invalidate_rect (drawable, rect, false); |
| // OS.gdk_window_clear_area_e(drawable, newX, srcY, Math.abs(deltaX), height); |
| } |
| if (deltaY != 0) { |
| int newY = destY - deltaY; |
| if (deltaY < 0) newY = destY + height; |
| rect.x = srcX; |
| rect.y = newY; |
| rect.width = width; |
| rect.height = Math.abs(deltaY); |
| OS.gdk_window_invalidate_rect (drawable, rect, false); |
| // OS.gdk_window_clear_area_e(drawable, srcX, newY, width, Math.abs(deltaY)); |
| } |
| } |
| } |
| |
| /**
|
| * 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.gdk_region_destroy(clipRgn); |
| Image image = data.image; |
| if (image != null) { |
| image.memGC = null; |
| if (image.transparentPixel != -1) image.createMask(); |
| } |
| |
| int context = data.context; |
| if (context != 0) OS.g_object_unref(context); |
| int layout = data.layout; |
| if (layout != 0) OS.g_object_unref(layout); |
| |
| /* Dispose the GC */ |
| drawable.internal_dispose_GC(handle, data); |
| |
| data.layout = data.context = data.drawable = data.clipRgn = 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.gdk_draw_arc(data.drawable, handle, 0, x, y, width, height, startAngle * 64, endAngle * 64); |
| } |
| |
| /**
|
| * 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 forground 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); |
| GtkStyle style = new GtkStyle(); |
| //CHECK - default style might not be attached to any window |
| OS.memmove(style, OS.gtk_widget_get_default_style()); |
| GdkColor color = new GdkColor(); |
| color.pixel = style.fg0_pixel; |
| color.red = style.fg0_red; |
| color.green = style.fg0_green; |
| color.blue = style.fg0_blue; |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| OS.gdk_gc_set_foreground(handle, color); |
| OS.gdk_draw_rectangle(data.drawable, handle, 0, x, y, width, height); |
| color.pixel = values.foreground_pixel; |
| color.red = values.foreground_red; |
| color.green = values.foreground_green; |
| color.blue = values.foreground_blue; |
| OS.gdk_gc_set_foreground(handle, color); |
| } |
| |
| /**
|
| * 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[] width = new int[1]; |
| int[] height = new int[1]; |
| OS.gdk_drawable_get_size(srcImage.pixmap, width, height); |
| int imgWidth = width[0]; |
| int imgHeight = height[0]; |
| 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); |
| } |
| } |
| if (srcImage.alpha != -1 || srcImage.alphaData != null) { |
| drawImageAlpha(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); |
| } else if (srcImage.transparentPixel != -1 || srcImage.mask != 0) { |
| drawImageMask(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); |
| } else { |
| drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); |
| } |
| } |
| void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight) { |
| if (srcWidth == destWidth && srcHeight == destHeight) { |
| OS.gdk_draw_drawable(data.drawable, handle, srcImage.pixmap, srcX, srcY, destX, destY, destWidth, destHeight); |
| } else { |
| int pixbuf = scale(srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, destWidth, destHeight); |
| OS.gdk_pixbuf_render_to_drawable(pixbuf, data.drawable, handle, 0, 0, destX, destY, destWidth, destHeight, OS.GDK_RGB_DITHER_NORMAL, 0, 0); |
| OS.g_object_unref(pixbuf); |
| } |
| } |
| void drawImageAlpha(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight) { |
| if (srcImage.alpha == 0) return; |
| if (srcImage.alpha == 255) { |
| drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight); |
| return; |
| } |
| int pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, true, 8, srcWidth, srcHeight); |
| if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int colormap = OS.gdk_colormap_get_system(); |
| OS.gdk_pixbuf_get_from_drawable(pixbuf, srcImage.pixmap, colormap, srcX, srcY, 0, 0, srcWidth, srcHeight); |
| int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); |
| int pixels = OS.gdk_pixbuf_get_pixels(pixbuf); |
| byte[] line = new byte[stride]; |
| byte alpha = (byte)srcImage.alpha; |
| byte[] alphaData = srcImage.alphaData; |
| for (int y=0; y<srcHeight; y++) { |
| int alphaIndex = (y + srcY) * imgWidth + srcX; |
| OS.memmove(line, pixels + (y * stride), stride); |
| for (int x=3; x<stride; x+=4) { |
| line[x] = alphaData == null ? alpha : alphaData[alphaIndex++]; |
| } |
| OS.memmove(pixels + (y * stride), line, stride); |
| } |
| if (srcWidth != destWidth || srcHeight != destHeight) { |
| int scaledPixbuf = OS.gdk_pixbuf_scale_simple(pixbuf, destWidth, destHeight, OS.GDK_INTERP_BILINEAR); |
| OS.g_object_unref(pixbuf); |
| if (scaledPixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| pixbuf = scaledPixbuf; |
| } |
| OS.gdk_pixbuf_render_to_drawable_alpha( |
| pixbuf, data.drawable, |
| 0, 0, destX, destY, destWidth, destHeight, |
| OS.GDK_PIXBUF_ALPHA_BILEVEL, 128, OS.GDK_RGB_DITHER_NORMAL, 0, 0); |
| OS.g_object_unref(pixbuf); |
| } |
| void drawImageMask(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight) { |
| int drawable = data.drawable; |
| int colorPixmap = srcImage.pixmap; |
| /* Generate the mask if necessary. */ |
| if (srcImage.transparentPixel != -1) srcImage.createMask(); |
| int maskPixmap = srcImage.mask; |
| if (srcWidth != destWidth || srcHeight != destHeight) { |
| //NOT DONE - there must be a better way of scaling a GdkBitmap |
| int pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, true, 8, srcWidth, srcHeight); |
| if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int colormap = OS.gdk_colormap_get_system(); |
| OS.gdk_pixbuf_get_from_drawable(pixbuf, colorPixmap, colormap, srcX, srcY, 0, 0, srcWidth, srcHeight); |
| int gdkImagePtr = OS.gdk_drawable_get_image(maskPixmap, 0, 0, imgWidth, imgHeight); |
| int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); |
| int pixels = OS.gdk_pixbuf_get_pixels(pixbuf); |
| if (gdkImagePtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| byte[] line = new byte[stride]; |
| for (int y=0; y<srcWidth; y++) { |
| OS.memmove(line, pixels + (y * stride), stride); |
| for (int x=0; x<srcHeight; x++) { |
| if (OS.gdk_image_get_pixel(gdkImagePtr, x + srcX, y + srcY) != 0) { |
| line[x*4+3] = (byte)0xFF; |
| } else { |
| line[x*4+3] = 0; |
| } |
| } |
| OS.memmove(pixels + (y * stride), line, stride); |
| } |
| OS.g_object_unref(gdkImagePtr); |
| int scaledPixbuf = OS.gdk_pixbuf_scale_simple(pixbuf, destWidth, destHeight, OS.GDK_INTERP_BILINEAR); |
| OS.g_object_unref(pixbuf); |
| if (scaledPixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| OS.gdk_pixbuf_render_to_drawable_alpha( |
| scaledPixbuf, data.drawable, |
| 0, 0, destX, destY, destWidth, destHeight, |
| OS.GDK_PIXBUF_ALPHA_BILEVEL, 128, OS.GDK_RGB_DITHER_NORMAL, 0, 0); |
| OS.g_object_unref(scaledPixbuf); |
| } else { |
| |
| /* Blit cliping the mask */ |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| OS.gdk_gc_set_clip_mask(handle, maskPixmap); |
| OS.gdk_gc_set_clip_origin(handle, destX - srcX, destY - srcY); |
| OS.gdk_draw_drawable(drawable, handle, colorPixmap, srcX, srcY, destX, destY, srcWidth, srcHeight); |
| OS.gdk_gc_set_values(handle, values, OS.GDK_GC_CLIP_MASK | OS.GDK_GC_CLIP_X_ORIGIN | OS.GDK_GC_CLIP_Y_ORIGIN); |
| } |
| |
| /* Destroy scaled pixmaps */ |
| if (colorPixmap != 0 && srcImage.pixmap != colorPixmap) OS.g_object_unref(colorPixmap); |
| if (maskPixmap != 0 && srcImage.mask != maskPixmap) OS.g_object_unref(maskPixmap); |
| /* Destroy the image mask if the there is a GC created on the image */ |
| if (srcImage.transparentPixel != -1 && srcImage.memGC != null) srcImage.destroyMask(); |
| } |
| int scale(int src, int srcX, int srcY, int srcWidth, int srcHeight, int destWidth, int destHeight) { |
| int pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, srcWidth, srcHeight); |
| if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int colormap = OS.gdk_colormap_get_system(); |
| OS.gdk_pixbuf_get_from_drawable(pixbuf, src, colormap, srcX, srcY, 0, 0, srcWidth, srcHeight); |
| int scaledPixbuf = OS.gdk_pixbuf_scale_simple(pixbuf, destWidth, destHeight, OS.GDK_INTERP_BILINEAR); |
| OS.g_object_unref(pixbuf); |
| if (scaledPixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| return scaledPixbuf; |
| } |
| |
| /**
|
| * 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); |
| OS.gdk_draw_line (data.drawable, handle, x1, y1, x2, y2); |
| } |
| |
| /**
|
| * 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.gdk_draw_arc(data.drawable, handle, 0, x, y, width, height, 0, 23040); |
| } |
| |
| /**
|
| * 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); |
| OS.gdk_draw_polygon(data.drawable, handle, 0, pointArray, pointArray.length / 2); |
| } |
| /**
|
| * 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); |
| OS.gdk_draw_lines(data.drawable, handle, pointArray, pointArray.length / 2); |
| } |
| |
| /**
|
| * 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; |
| } |
| OS.gdk_draw_rectangle(data.drawable, handle, 0, x, y, width, height); |
| } |
| |
| /**
|
| * 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); |
| int nx = x; |
| int ny = y; |
| int nw = width; |
| int nh = height; |
| int naw = arcWidth; |
| int nah = arcHeight; |
| |
| if (nw < 0) { |
| nw = 0 - nw; |
| nx = nx - nw; |
| } |
| if (nh < 0) { |
| nh = 0 - nh; |
| ny = ny -nh; |
| } |
| if (naw < 0) |
| naw = 0 - naw; |
| if (nah < 0) |
| nah = 0 - nah; |
| |
| int naw2 = naw / 2; |
| int nah2 = nah / 2; |
| |
| int drawable = data.drawable; |
| if (nw > naw) { |
| if (nh > nah) { |
| OS.gdk_draw_arc(drawable, handle, 0, nx, ny, naw, nah, 5760, 5760); |
| OS.gdk_draw_line(drawable, handle, nx + naw2, ny, nx + nw - naw2, ny); |
| OS.gdk_draw_arc(drawable, handle, 0, nx + nw - naw, ny, naw, nah, 0, 5760); |
| OS.gdk_draw_line(drawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2); |
| OS.gdk_draw_arc(drawable, handle, 0, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760); |
| OS.gdk_draw_line(drawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh); |
| OS.gdk_draw_arc(drawable, handle, 0, nx, ny + nh - nah, naw, nah, 11520, 5760); |
| OS.gdk_draw_line(drawable, handle, nx, ny + nah2, nx, ny + nh - nah2); |
| } else { |
| OS.gdk_draw_arc(drawable, handle, 0, nx, ny, naw, nh, 5760, 11520); |
| OS.gdk_draw_line(drawable, handle, nx + naw2, ny, nx + nw - naw2, ny); |
| OS.gdk_draw_arc(drawable, handle, 0, nx + nw - naw, ny, naw, nh, 17280, 11520); |
| OS.gdk_draw_line(drawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh); |
| } |
| } else { |
| if (nh > nah) { |
| OS.gdk_draw_arc(drawable, handle, 0, nx, ny, nw, nah, 0, 11520); |
| OS.gdk_draw_line(drawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2); |
| OS.gdk_draw_arc(drawable, handle, 0, nx, ny + nh - nah, nw, nah, 11520, 11520); |
| OS.gdk_draw_line(drawable,handle, nx, ny + nah2, nx, ny + nh - nah2); |
| } else { |
| OS.gdk_draw_arc(drawable, handle, 0, nx, ny, nw, nh, 0, 23040); |
| } |
| } |
| } |
| |
| /**
|
| * 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); |
| //FIXME - need to avoid delimiter and tabs |
| int layout = data.layout; |
| byte[] buffer = Converter.wcsToMbcs(null, string, true); |
| OS.pango_layout_set_text(layout, buffer, buffer.length - 1); |
| OS.gdk_draw_layout(data.drawable, handle, x, y, layout); |
| } |
| |
| /**
|
| * 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); |
| //FIXME - check flags |
| int layout = data.layout; |
| byte[] buffer = Converter.wcsToMbcs(null, string, true); |
| OS.pango_layout_set_text(layout, buffer, buffer.length - 1); |
| OS.gdk_draw_layout(data.drawable, handle, x, y, layout); |
| } |
| |
| /**
|
| * 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); |
| } |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| GdkColor color = new GdkColor(); |
| color.pixel = values.background_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| OS.gdk_draw_arc(data.drawable, handle, 1, x, y, width, height, startAngle * 64, endAngle * 64); |
| color.pixel = values.foreground_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| } |
| |
| /**
|
| * 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 */ |
| |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| |
| 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; |
| } |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| GdkColor color = new GdkColor(); |
| color.pixel = values.background_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| OS.gdk_draw_arc(data.drawable, handle, 1, x, y, width, height, 0, 23040); |
| color.pixel = values.foreground_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| } |
| |
| /**
|
| * 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); |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| GdkColor color = new GdkColor(); |
| color.pixel = values.background_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| OS.gdk_draw_polygon(data.drawable, handle, 1, pointArray, pointArray.length / 2); |
| color.pixel = values.foreground_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| } |
| |
| /**
|
| * 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; |
| } |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| GdkColor color = new GdkColor(); |
| color.pixel = values.background_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| OS.gdk_draw_rectangle(data.drawable, handle, 1, x, y, width, height); |
| color.pixel = values.foreground_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| } |
| |
| /**
|
| * 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); |
| int nx = x; |
| int ny = y; |
| int nw = width; |
| int nh = height; |
| int naw = arcWidth; |
| int nah = arcHeight; |
| |
| if (nw < 0) { |
| nw = 0 - nw; |
| nx = nx - nw; |
| } |
| if (nh < 0) { |
| nh = 0 - nh; |
| ny = ny -nh; |
| } |
| if (naw < 0) |
| naw = 0 - naw; |
| if (nah < 0) |
| nah = 0 - nah; |
| |
| int naw2 = naw / 2; |
| int nah2 = nah / 2; |
| |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| GdkColor color = new GdkColor(); |
| color.pixel = values.background_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| |
| int drawable = data.drawable; |
| if (nw > naw) { |
| if (nh > nah) { |
| OS.gdk_draw_arc(drawable, handle, 1, nx, ny, naw, nah, 5760, 5760); |
| OS.gdk_draw_arc(drawable, handle, 1, nx, ny + nh - nah, naw, nah, 11520, 5760); |
| OS.gdk_draw_arc(drawable, handle, 1, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760); |
| OS.gdk_draw_arc(drawable, handle, 1, nx + nw - naw, ny, naw, nah, 0, 5760); |
| OS.gdk_draw_rectangle(drawable, handle, 1, nx + naw2, ny, nw - naw, nh); |
| OS.gdk_draw_rectangle(drawable, handle, 1, nx, ny + nah2, naw2, nh - nah); |
| OS.gdk_draw_rectangle(drawable, handle, 1, nx + nw - naw2, ny + nah2, naw2, nh -nah); |
| } else { |
| OS.gdk_draw_arc(drawable, handle, 1, nx, ny, naw, nh, 5760, 11520); |
| OS.gdk_draw_rectangle(drawable, handle, 1, nx + naw2, ny, nw - naw, nh); |
| OS.gdk_draw_arc(drawable, handle, 1, nx + nw - naw, ny, naw, nh, 17280, 11520); |
| } |
| } else { |
| if (nh > nah) { |
| OS.gdk_draw_arc(drawable, handle, 1, nx, ny, nw, nah, 0, 11520); |
| OS.gdk_draw_rectangle(drawable, handle, 1, nx, ny + nah2, nw, nh - nah); |
| OS.gdk_draw_arc(drawable, handle, 1, nx, ny + nh - nah, nw, nah, 11520, 11520); |
| } else { |
| OS.gdk_draw_arc(drawable, handle, 1, nx, ny, nw, nh, 0, 23040); |
| } |
| } |
| |
| color.pixel = values.foreground_pixel; |
| OS.gdk_gc_set_foreground(handle, color); |
| } |
| |
| /**
|
| * 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); |
| //BOGUS |
| 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); |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| GdkColor color = new GdkColor(); |
| int colormap = OS.gdk_colormap_get_system(); |
| OS.gdk_colormap_query_color(colormap, values.background_pixel, color); |
| return Color.gtk_new(data.device, color); |
| } |
| |
| /**
|
| * 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); |
| //BOGUS |
| 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); |
| int clipRgn = data.clipRgn; |
| if (clipRgn == 0) { |
| int[] width = new int[1]; int[] height = new int[1]; |
| OS.gdk_drawable_get_size(data.drawable, width, height); |
| return new Rectangle(0, 0, width[0], height[0]); |
| } |
| GdkRectangle rect = new GdkRectangle(); |
| OS.gdk_region_get_clipbox(clipRgn, rect); |
| return new Rectangle(rect.x, rect.y, rect.width, rect.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); |
| int hRegion = region.handle; |
| int clipRgn = data.clipRgn; |
| OS.gdk_region_subtract(hRegion, hRegion); |
| if (data.clipRgn == 0) { |
| int[] width = new int[1]; int[] height = new int[1]; |
| OS.gdk_drawable_get_size(data.drawable, width, height); |
| GdkRectangle rect = new GdkRectangle(); |
| rect.x = 0; rect.y = 0; |
| rect.width = width[0]; rect.height = height[0]; |
| OS.gdk_region_union_with_rect(hRegion, rect); |
| return; |
| } |
| OS.gdk_region_union(hRegion, clipRgn); |
| } |
| /**
|
| * 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 Font.gtk_new(data.device, 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); |
| int context = data.context; |
| //FIXME - figure out correct language |
| byte[] buffer = Converter.wcsToMbcs(null, "en_US", true); |
| int lang = OS.pango_language_from_string(buffer); |
| // int lang = OS.pango_context_get_language(context); |
| int metrics = OS.pango_context_get_metrics(context, data.font, lang); |
| FontMetrics fm = new FontMetrics(); |
| fm.ascent = OS.PANGO_PIXELS(OS.pango_font_metrics_get_ascent(metrics)); |
| fm.descent = OS.PANGO_PIXELS(OS.pango_font_metrics_get_descent(metrics)); |
| fm.averageCharWidth = OS.PANGO_PIXELS(OS.pango_font_metrics_get_approximate_char_width(metrics)); |
| fm.height = fm.ascent + fm.descent; |
| OS.pango_font_metrics_unref(metrics); |
| 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); |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| GdkColor color = new GdkColor(); |
| int colormap = OS.gdk_colormap_get_system(); |
| OS.gdk_colormap_query_color(colormap, values.foreground_pixel, color); |
| return Color.gtk_new(data.device, color); |
| } |
| |
| /**
|
| * 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); |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| return values.line_width; |
| } |
| |
| /**
|
| * 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); |
| GdkGCValues values = new GdkGCValues(); |
| OS.gdk_gc_get_values(handle, values); |
| return values.function == OS.GDK_XOR; |
| } |
| |
| /**
|
| * 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 gdkGC) { |
| int context = OS.gdk_pango_context_get(); |
| if (context == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| data.context = context; |
| int layout = OS.pango_layout_new(context); |
| if (context == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| data.layout = layout; |
| |
| GdkColor foreground = data.foreground; |
| if (foreground != null) OS.gdk_gc_set_foreground(gdkGC, foreground); |
| GdkColor background = data.background; |
| if (background != null) OS.gdk_gc_set_background (gdkGC, background); |
| int font = data.font; |
| if (font != 0) OS.pango_layout_set_font_description(layout, font); |
| |
| Image image = data.image; |
| if (image != null) { |
| image.memGC = this; |
| /* |
| * The transparent pixel mask might change when drawing on |
| * the image. Destroy it so that it is regenerated when |
| * necessary. |
| */ |
| if (image.transparentPixel != -1) image.destroyMask(); |
| } |
| this.drawable = drawable; |
| this.data = data; |
| handle = gdkGC; |
| } |
| |
| /**
|
| * 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); |
| OS.gdk_gc_set_background(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); |
| int clipRgn = data.clipRgn; |
| if (clipRgn == 0) { |
| data.clipRgn = clipRgn = OS.gdk_region_new(); |
| } else { |
| OS.gdk_region_subtract(clipRgn, clipRgn); |
| } |
| GdkRectangle rect = new GdkRectangle(); |
| rect.x = x; rect.y = y; |
| rect.width = width; rect.height = height; |
| OS.gdk_gc_set_clip_rectangle(handle, rect); |
| OS.gdk_region_union_with_rect(clipRgn, rect); |
| } |
| /**
|
| * 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 rect) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| int clipRgn = data.clipRgn; |
| if (rect == null) { |
| OS.gdk_gc_set_clip_region(handle, 0); |
| if (clipRgn != 0) { |
| OS.gdk_region_destroy(clipRgn); |
| data.clipRgn = clipRgn = 0; |
| } |
| return; |
| } |
| setClipping (rect.x, rect.y, rect.width, rect.height); |
| } |
| /**
|
| * 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); |
| int clipRgn = data.clipRgn; |
| if (region == null) { |
| OS.gdk_gc_set_clip_region(handle, 0); |
| if (clipRgn != 0) { |
| OS.gdk_region_destroy(clipRgn); |
| data.clipRgn = clipRgn = 0; |
| } |
| } else { |
| if (clipRgn == 0) { |
| data.clipRgn = clipRgn = OS.gdk_region_new(); |
| } else { |
| OS.gdk_region_subtract(clipRgn, clipRgn); |
| } |
| OS.gdk_region_union(clipRgn, region.handle); |
| OS.gdk_gc_set_clip_region(handle, clipRgn); |
| } |
| } |
| |
| /**
|
| * 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); |
| int fontHandle = data.font = font.handle; |
| OS.pango_layout_set_font_description(data.layout, fontHandle); |
| } |
| |
| /**
|
| * 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); |
| OS.gdk_gc_set_foreground(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: |
| this.data.lineStyle = lineStyle; |
| OS.gdk_gc_set_line_attributes(handle, 0, OS.GDK_LINE_SOLID, OS.GDK_CAP_BUTT, OS.GDK_JOIN_MITER); |
| return; |
| case SWT.LINE_DASH: |
| OS.gdk_gc_set_dashes(handle, 0, new byte[] {6, 2}, 2); |
| break; |
| case SWT.LINE_DOT: |
| OS.gdk_gc_set_dashes(handle, 0, new byte[] {3, 1}, 2); |
| break; |
| case SWT.LINE_DASHDOT: |
| OS.gdk_gc_set_dashes(handle, 0, new byte[] {6, 2, 3, 1}, 4); |
| break; |
| case SWT.LINE_DASHDOTDOT: |
| OS.gdk_gc_set_dashes(handle, 0, new byte[] {6, 2, 3, 1, 3, 1}, 6); |
| break; |
| default: |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| data.lineStyle = lineStyle; |
| OS.gdk_gc_set_line_attributes(handle, 0, OS.GDK_LINE_DOUBLE_DASH, OS.GDK_CAP_BUTT, OS.GDK_JOIN_MITER); |
| } |
| |
| /**
|
| * 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); |
| if (data.lineStyle == SWT.LINE_SOLID) { |
| OS.gdk_gc_set_line_attributes(handle, width, OS.GDK_LINE_SOLID, OS.GDK_CAP_BUTT, OS.GDK_JOIN_MITER); |
| } else { |
| OS.gdk_gc_set_line_attributes(handle, width, OS.GDK_LINE_DOUBLE_DASH, OS.GDK_CAP_BUTT, OS.GDK_JOIN_MITER); |
| } |
| } |
| |
| /**
|
| * 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 val) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| OS.gdk_gc_set_function(handle, val ? OS.GDK_XOR : OS.GDK_COPY); |
| } |
| |
| /**
|
| * 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); |
| //FIXME - need to avoid delimiter and tabs |
| int layout = data.layout; |
| byte[] buffer = Converter.wcsToMbcs(null, string, true); |
| OS.pango_layout_set_text(layout, buffer, buffer.length - 1); |
| int[] width = new int[1]; |
| int[] height = new int[1]; |
| OS.pango_layout_get_size(layout, width, height); |
| return new Point(OS.PANGO_PIXELS(width[0]), OS.PANGO_PIXELS(height[0])); |
| } |
| |
| /**
|
| * 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); |
| //FIXME - check flags |
| int layout = data.layout; |
| byte[] buffer = Converter.wcsToMbcs(null, string, true); |
| OS.pango_layout_set_text(layout, buffer, buffer.length - 1); |
| int[] width = new int[1]; |
| int[] height = new int[1]; |
| OS.pango_layout_get_size(layout, width, height); |
| return new Point(OS.PANGO_PIXELS(width[0]), OS.PANGO_PIXELS(height[0])); |
| } |
| |
| /**
|
| * 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 + "}"; |
| } |
| |
| } |