Mercurial > projects > dwt-mac
view dwt/graphics/Pattern.d @ 3:649b8e223d5a
fix extends
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Wed, 27 Aug 2008 13:48:25 +0200 |
parents | 380af2bdd8e5 |
children | 1a8b3cb347e0 |
line wrap: on
line source
/******************************************************************************* * Copyright (c) 2000, 2007 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ module dwt.graphics.Pattern; import dwt.dwthelper.utils; import dwt.DWT; import dwt.DWTError; import dwt.DWTException; import dwt.internal.cocoa.NSColor; import dwt.internal.cocoa.NSGradient; import dwt.internal.cocoa.NSPoint; /** * Instances of this class represent patterns to use while drawing. Patterns * can be specified either as bitmaps or gradients. * <p> * Application code must explicitly invoke the <code>Pattern.dispose()</code> * method to release the operating system resources managed by each instance * when those instances are no longer required. * </p> * <p> * This class requires the operating system's advanced graphics subsystem * which may not be available on some platforms. * </p> * * @since 3.1 */ public class Pattern : Resource { NSColor color; NSGradient gradient; NSPoint pt1, pt2; Image image; float[] color1, color2; int alpha1, alpha2; /** * Constructs a new Pattern given an image. Drawing with the resulting * pattern will cause the image to be tiled over the resulting area. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param device the device on which to allocate the pattern * @param image the image that the pattern will draw * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device, or the image is null</li> * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle for the pattern could not be obtained</li> * </ul> * * @see #dispose() */ public Pattern(Device device, Image image) { super(device); if (image is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (image.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); this.image = image; color = NSColor.colorWithPatternImage(image.handle); color.retain(); init(); } /** * Constructs a new Pattern that represents a linear, two color * gradient. Drawing with the pattern will cause the resulting area to be * tiled with the gradient specified by the arguments. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param device the device on which to allocate the pattern * @param x1 the x coordinate of the starting corner of the gradient * @param y1 the y coordinate of the starting corner of the gradient * @param x2 the x coordinate of the ending corner of the gradient * @param y2 the y coordinate of the ending corner of the gradient * @param color1 the starting color of the gradient * @param color2 the ending color of the gradient * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device, * or if either color1 or color2 is null</li> * <li>ERROR_INVALID_ARGUMENT - if either color1 or color2 has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle for the pattern could not be obtained</li> * </ul> * * @see #dispose() */ public Pattern(Device device, float x1, float y1, float x2, float y2, Color color1, Color color2) { this(device, x1, y1, x2, y2, color1, 0xFF, color2, 0xFF); } /** * Constructs a new Pattern that represents a linear, two color * gradient. Drawing with the pattern will cause the resulting area to be * tiled with the gradient specified by the arguments. * <p> * This operation requires the operating system's advanced * graphics subsystem which may not be available on some * platforms. * </p> * * @param device the device on which to allocate the pattern * @param x1 the x coordinate of the starting corner of the gradient * @param y1 the y coordinate of the starting corner of the gradient * @param x2 the x coordinate of the ending corner of the gradient * @param y2 the y coordinate of the ending corner of the gradient * @param color1 the starting color of the gradient * @param alpha1 the starting alpha value of the gradient * @param color2 the ending color of the gradient * @param alpha2 the ending alpha value of the gradient * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device, * or if either color1 or color2 is null</li> * <li>ERROR_INVALID_ARGUMENT - if either color1 or color2 has been disposed</li> * </ul> * @exception DWTException <ul> * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> * </ul> * @exception DWTError <ul> * <li>ERROR_NO_HANDLES if a handle for the pattern could not be obtained</li> * </ul> * * @see #dispose() * * @since 3.2 */ public Pattern(Device device, float x1, float y1, float x2, float y2, Color color1, int alpha1, Color color2, int alpha2) { super(device); if (color1 is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (color1.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); if (color2 is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (color2.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); pt1 = new NSPoint(); pt2 = new NSPoint(); pt1.x = x1; pt1.y = y1; pt2.x = x2; pt2.y = y2; this.color1 = color1.handle; this.color2 = color2.handle; this.alpha1 = alpha1; this.alpha2 = alpha2; NSColor start = NSColor.colorWithDeviceRed(color1.handle[0], color1.handle[1], color1.handle[2], alpha1 / 255f); NSColor end = NSColor.colorWithDeviceRed(color2.handle[0], color2.handle[1], color2.handle[2], alpha2 / 255f); gradient = ((NSGradient)new NSGradient().alloc()).initWithStartingColor(start, end); init(); } void destroy() { if (color !is null) color.release(); color = null; if (gradient !is null) gradient.release(); gradient = null; image = null; color1 = color2 = null; } /** * Returns <code>true</code> if the Pattern has been disposed, * and <code>false</code> otherwise. * <p> * This method gets the dispose state for the Pattern. * When a Pattern has been disposed, it is an error to * invoke any other method using the Pattern. * * @return <code>true</code> when the Pattern is disposed, and <code>false</code> otherwise */ public bool isDisposed() { return device is null; } /** * 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 "Pattern {*DISPOSED*}"; return "Pattern {" + (color !is null ? color.id : gradient.id) + "}"; } }