--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/graphics/Pattern.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,207 @@
+/*******************************************************************************
+ * 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 extends 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) + "}";
+}
+    
+}