--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/graphics/Path.d	Mon Mar 02 14:44:16 2009 +0100
@@ -0,0 +1,622 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.swt.graphics.Path;
+
+import org.eclipse.swt.internal.gdip.Gdip;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.SWTError;
+import org.eclipse.swt.SWTException;
+import org.eclipse.swt.internal.gdip.Gdip;
+import org.eclipse.swt.internal.win32.OS;
+
+import org.eclipse.swt.graphics.Resource;
+import org.eclipse.swt.graphics.Device;
+import org.eclipse.swt.graphics.Font;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.GCData;
+import org.eclipse.swt.graphics.PathData;
+
+import java.lang.System;
+import tango.text.convert.Format;
+import java.lang.all;
+
+/**
+ * Instances of this class represent paths through the two-dimensional
+ * coordinate system. Paths do not have to be continuous, and can be
+ * described using lines, rectangles, arcs, cubic or quadratic bezier curves,
+ * glyphs, or other paths.
+ * <p>
+ * Application code must explicitly invoke the <code>Path.dispose()</code>
+ * method to release the operating system resources managed by each instance
+ * when those instances are no longer required.
+ * </p>
+ * <p>
+ * This class requires the operating system's advanced graphics subsystem
+ * which may not be available on some platforms.
+ * </p>
+ *
+ * @see <a href="http://www.eclipse.org/swt/snippets/#path">Path, Pattern snippets</a>
+ * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: GraphicsExample</a>
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ * 
+ * @since 3.1
+ */
+public class Path : Resource {
+
+    alias Resource.init_ init_;
+
+    /**
+     * the OS resource for the Path
+     * (Warning: This field is platform dependent)
+     * <p>
+     * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
+     * public API. It is marked public only so that it can be shared
+     * within the packages provided by SWT. It is not available on all
+     * platforms and should never be accessed from application code.
+     * </p>
+     */
+    public Gdip.Path handle;
+
+    Gdip.PointF currentPoint, startPoint;
+
+/**
+ * Constructs a new empty Path.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param device the device on which to allocate the path
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ * @exception SWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li>
+ * </ul>
+ *
+ * @see #dispose()
+ */
+public this (Device device) {
+    super(device);
+    this.device.checkGDIP();
+    handle = Gdip.GraphicsPath_new(Gdip.FillModeAlternate);
+    if (handle is null) SWT.error(SWT.ERROR_NO_HANDLES);
+    init_();
+}
+
+/**
+ * Constructs a new Path that is a copy of <code>path</code>. If
+ * <code>flatness</code> is less than or equal to zero, an unflatten
+ * copy of the path is created. Otherwise, it specifies the maximum
+ * error between the path and its flatten copy. Smaller numbers give
+ * better approximation.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param device the device on which to allocate the path
+ * @param path the path to make a copy
+ * @param flatness the flatness value
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li>
+ *    <li>ERROR_NULL_ARGUMENT - if the path is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the path has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ * @exception SWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li>
+ * </ul>
+ *
+ * @see #dispose()
+ * @since 3.4
+ */
+public this (Device device, Path path, float flatness) {
+    super(device);
+    if (path is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+    if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+    flatness = Math.max(0, flatness);
+    handle = Gdip.GraphicsPath_Clone(path.handle);
+    if (flatness !is 0) Gdip.GraphicsPath_Flatten(handle, null, flatness);
+    if (handle is null) SWT.error(SWT.ERROR_NO_HANDLES);
+    init_();
+}
+
+/**
+ * Constructs a new Path with the specifed PathData.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param device the device on which to allocate the path
+ * @param data the data for the path
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li>
+ *    <li>ERROR_NULL_ARGUMENT - if the data is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ * @exception SWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li>
+ * </ul>
+ *
+ * @see #dispose()
+ * @since 3.4
+ */
+public this (Device device, PathData data) {
+    this(device);
+    if (data is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+    init_(data);
+}
+
+/**
+ * Adds to the receiver a circular or elliptical arc that lies within
+ * the specified rectangular area.
+ * <p>
+ * The resulting arc begins at <code>startAngle</code> and extends
+ * for <code>arcAngle</code> degrees.
+ * Angles are interpreted such that 0 degrees is at the 3 o'clock
+ * position. A positive value indicates a counter-clockwise rotation
+ * while a negative value indicates a clockwise rotation.
+ * </p><p>
+ * The center of the arc is the center of the rectangle whose origin
+ * is (<code>x</code>, <code>y</code>) and whose size is specified by the
+ * <code>width</code> and <code>height</code> arguments.
+ * </p><p>
+ * The resulting arc covers an area <code>width + 1</code> pixels wide
+ * by <code>height + 1</code> pixels tall.
+ * </p>
+ *
+ * @param x the x coordinate of the upper-left corner of the arc
+ * @param y the y coordinate of the upper-left corner of the arc
+ * @param width the width of the arc
+ * @param height the height of the arc
+ * @param startAngle the beginning angle
+ * @param arcAngle the angular extent of the arc, relative to the start angle
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addArc(float x, float y, float width, float height, float startAngle, float arcAngle) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    if (width < 0) {
+        x = x + width;
+        width = -width;
+    }
+    if (height < 0) {
+        y = y + height;
+        height = -height;
+    }
+    if (width is 0 || height is 0 || arcAngle is 0) return;
+    if (width is height) {
+        Gdip.GraphicsPath_AddArcF(handle, x, y, width, height, -startAngle, -arcAngle);
+    } else {
+        auto path = Gdip.GraphicsPath_new(Gdip.FillModeAlternate);
+        if (path is null) SWT.error(SWT.ERROR_NO_HANDLES);
+        auto matrix = Gdip.Matrix_new(width, 0, 0, height, x, y);
+        if (matrix is null) SWT.error(SWT.ERROR_NO_HANDLES);
+        Gdip.GraphicsPath_AddArc(path, 0, 0, 1, 1, -startAngle, -arcAngle);
+        Gdip.GraphicsPath_Transform(path, matrix);
+        Gdip.GraphicsPath_AddPath(handle, path, true);
+        Gdip.Matrix_delete(matrix);
+        Gdip.GraphicsPath_delete(path);
+    }
+    Gdip.GraphicsPath_GetLastPoint(handle, currentPoint);
+}
+
+/**
+ * Adds to the receiver the path described by the parameter.
+ *
+ * @param path the path to add to the receiver
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addPath(Path path) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    if (path is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+    if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+    //TODO - expose connect?
+    Gdip.GraphicsPath_AddPath(handle, path.handle, false);
+    currentPoint.X = path.currentPoint.X;
+    currentPoint.Y = path.currentPoint.Y;
+}
+
+/**
+ * Adds to the receiver the rectangle specified by x, y, width and height.
+ *
+ * @param x the x coordinate of the rectangle to add
+ * @param y the y coordinate of the rectangle to add
+ * @param width the width of the rectangle to add
+ * @param height the height of the rectangle to add
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addRectangle(float x, float y, float width, float height) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    Gdip.RectF rect;
+    rect.X = x;
+    rect.Y = y;
+    rect.Width = width;
+    rect.Height = height;
+    Gdip.GraphicsPath_AddRectangle(handle, rect);
+    currentPoint.X = x;
+    currentPoint.Y = y;
+}
+
+/**
+ * Adds to the receiver the pattern of glyphs generated by drawing
+ * the given string using the given font starting at the point (x, y).
+ *
+ * @param string the text to use
+ * @param x the x coordinate of the starting point
+ * @param y the y coordinate of the starting point
+ * @param font the font to use
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the font is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void addString(String string, float x, float y, Font font) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    if (font is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+    if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+    wchar[] wstr = StrToWCHARs( string );
+    wchar* buffer = wstr.ptr;
+    int length = wstr.length;
+    auto hDC = device.internal_new_GC(null);
+    auto gdipFont = GC.createGdipFont(hDC, font.handle);
+    Gdip.PointF point;
+    point.X = x - (Gdip.Font_GetSize(gdipFont) / 6);
+    point.Y = y;
+    auto family = Gdip.FontFamily_new();
+    Gdip.Font_GetFamily(gdipFont, family);
+    int style = Gdip.Font_GetStyle(gdipFont);
+    float size = Gdip.Font_GetSize(gdipFont);
+    Gdip.GraphicsPath_AddString(handle, buffer, length, family, style, size, point, null);
+    Gdip.GraphicsPath_GetLastPoint(handle, currentPoint);
+    Gdip.FontFamily_delete(family);
+    Gdip.Font_delete(gdipFont);
+    device.internal_dispose_GC(hDC, null);
+}
+
+/**
+ * Closes the current sub path by adding to the receiver a line
+ * from the current point of the path back to the starting point
+ * of the sub path.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void close() {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    Gdip.GraphicsPath_CloseFigure(handle);
+    /*
+    * Feature in GDI+. CloseFigure() does affect the last
+    * point, so GetLastPoint() does not return the starting
+    * point of the subpath after calling CloseFigure().  The
+    * fix is to remember the subpath starting point and use
+    * it instead.
+    */
+    currentPoint.X = startPoint.X;
+    currentPoint.Y = startPoint.Y;
+}
+
+/**
+ * Returns <code>true</code> if the specified point is contained by
+ * the receiver and false otherwise.
+ * <p>
+ * If outline is <code>true</code>, the point (x, y) checked for containment in
+ * the receiver's outline. If outline is <code>false</code>, the point is
+ * checked to see if it is contained within the bounds of the (closed) area
+ * covered by the receiver.
+ *
+ * @param x the x coordinate of the point to test for containment
+ * @param y the y coordinate of the point to test for containment
+ * @param gc the GC to use when testing for containment
+ * @param outline controls whether to check the outline or contained area of the path
+ * @return <code>true</code> if the path contains the point and <code>false</code> otherwise
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public bool contains(float x, float y, GC gc, bool outline) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    if (gc is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+    if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+    //TODO - should use GC transformation
+    gc.initGdip();
+    gc.checkGC(GC.LINE_CAP | GC.LINE_JOIN | GC.LINE_STYLE | GC.LINE_WIDTH);
+    int mode = OS.GetPolyFillMode(gc.handle) is OS.WINDING ? Gdip.FillModeWinding : Gdip.FillModeAlternate;
+    Gdip.GraphicsPath_SetFillMode(handle, mode);
+    if (outline) {
+        return Gdip.GraphicsPath_IsOutlineVisible(handle, x, y, gc.data.gdipPen, gc.data.gdipGraphics);
+    } else {
+        return Gdip.GraphicsPath_IsVisible(handle, x, y, gc.data.gdipGraphics);
+    }
+}
+
+/**
+ * Adds to the receiver a cubic bezier curve based on the parameters.
+ *
+ * @param cx1 the x coordinate of the first control point of the spline
+ * @param cy1 the y coordinate of the first control of the spline
+ * @param cx2 the x coordinate of the second control of the spline
+ * @param cy2 the y coordinate of the second control of the spline
+ * @param x the x coordinate of the end point of the spline
+ * @param y the y coordinate of the end point of the spline
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    Gdip.GraphicsPath_AddBezier(handle, currentPoint.X, currentPoint.Y, cx1, cy1, cx2, cy2, x, y);
+    Gdip.GraphicsPath_GetLastPoint(handle, currentPoint);
+}
+
+void destroy() {
+    Gdip.GraphicsPath_delete(handle);
+    handle = null;
+}
+
+/**
+ * Replaces the first four elements in the parameter with values that
+ * describe the smallest rectangle that will completely contain the
+ * receiver (i.e. the bounding box).
+ *
+ * @param bounds the array to hold the result
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the bounding box</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void getBounds(float[] bounds) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    if (bounds is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+    if (bounds.length < 4) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+    Gdip.RectF rect;
+    Gdip.GraphicsPath_GetBounds(handle, rect, null, null);
+    bounds[0] = rect.X;
+    bounds[1] = rect.Y;
+    bounds[2] = rect.Width;
+    bounds[3] = rect.Height;
+}
+
+/**
+ * Replaces the first two elements in the parameter with values that
+ * describe the current point of the path.
+ *
+ * @param point the array to hold the result
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the end point</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void getCurrentPoint(float[] point) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    if (point is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+    if (point.length < 2) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+    point[0] = currentPoint.X;
+    point[1] = currentPoint.Y;
+}
+
+/**
+ * Returns a device independent representation of the receiver.
+ *
+ * @return the PathData for the receiver
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see PathData
+ */
+public PathData getPathData() {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    int count = Gdip.GraphicsPath_GetPointCount(handle);
+    byte[] gdipTypes = new byte[count];
+    float[] points = new float[count * 2];
+    Gdip.GraphicsPath_GetPathTypes(handle, gdipTypes.ptr, count);
+    Gdip.GraphicsPath_GetPathPoints(handle, cast(Gdip.PointF*)points.ptr, count);
+    byte[] types = new byte[count * 2];
+    int index = 0, typesIndex = 0;
+    while (index < count) {
+        byte type = gdipTypes[index];
+        bool close = false;
+        switch (type & Gdip.PathPointTypePathTypeMask) {
+            case Gdip.PathPointTypeStart:
+                types[typesIndex++] = SWT.PATH_MOVE_TO;
+                close = (type & Gdip.PathPointTypeCloseSubpath) !is 0;
+                index += 1;
+                break;
+            case Gdip.PathPointTypeLine:
+                types[typesIndex++] = SWT.PATH_LINE_TO;
+                close = (type & Gdip.PathPointTypeCloseSubpath) !is 0;
+                index += 1;
+                break;
+            case Gdip.PathPointTypeBezier:
+                types[typesIndex++] = SWT.PATH_CUBIC_TO;
+                close = (gdipTypes[index + 2] & Gdip.PathPointTypeCloseSubpath) !is 0;
+                index += 3;
+                break;
+            default:
+                index++;
+        }
+        if (close) {
+            types[typesIndex++] = SWT.PATH_CLOSE;
+        }
+    }
+    if (typesIndex !is types.length) {
+        byte[] newTypes = new byte[typesIndex];
+        System.arraycopy(types, 0, newTypes, 0, typesIndex);
+        types = newTypes;
+    }
+    PathData result = new PathData();
+    result.types = types;
+    result.points = points;
+    return result;
+}
+
+/**
+ * Adds to the receiver a line from the current point to
+ * the point specified by (x, y).
+ *
+ * @param x the x coordinate of the end of the line to add
+ * @param y the y coordinate of the end of the line to add
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void lineTo(float x, float y) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    Gdip.GraphicsPath_AddLine(handle, currentPoint.X, currentPoint.Y, x, y);
+    Gdip.GraphicsPath_GetLastPoint(handle, currentPoint);
+}
+
+void init_(PathData data) {
+    byte[] types = data.types;
+    float[] points = data.points;
+    for (int i = 0, j = 0; i < types.length; i++) {
+        switch (types[i]) {
+            case SWT.PATH_MOVE_TO:
+                moveTo(points[j++], points[j++]);
+                break;
+            case SWT.PATH_LINE_TO:
+                lineTo(points[j++], points[j++]);
+                break;
+            case SWT.PATH_CUBIC_TO:
+                cubicTo(points[j++], points[j++], points[j++], points[j++], points[j++], points[j++]);
+                break;
+            case SWT.PATH_QUAD_TO:
+                quadTo(points[j++], points[j++], points[j++], points[j++]);
+                break;
+            case SWT.PATH_CLOSE:
+                close();
+                break;
+            default:
+                dispose();
+                SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+        }
+    }
+}
+
+/**
+ * Returns <code>true</code> if the Path has been disposed,
+ * and <code>false</code> otherwise.
+ * <p>
+ * This method gets the dispose state for the Path.
+ * When a Path has been disposed, it is an error to
+ * invoke any other method using the Path.
+ *
+ * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise
+ */
+override public bool isDisposed() {
+    return handle is null;
+}
+
+/**
+ * Sets the current point of the receiver to the point
+ * specified by (x, y). Note that this starts a new
+ * sub path.
+ *
+ * @param x the x coordinate of the new end point
+ * @param y the y coordinate of the new end point
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void moveTo(float x, float y) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    Gdip.GraphicsPath_StartFigure(handle);
+    currentPoint.X = startPoint.X = x;
+    currentPoint.Y = startPoint.Y = y;
+}
+
+/**
+ * Adds to the receiver a quadratic curve based on the parameters.
+ *
+ * @param cx the x coordinate of the control point of the spline
+ * @param cy the y coordinate of the control point of the spline
+ * @param x the x coordinate of the end point of the spline
+ * @param y the y coordinate of the end point of the spline
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void quadTo(float cx, float cy, float x, float y) {
+    if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+    float cx1 = currentPoint.X + 2 * (cx - currentPoint.X) / 3;
+    float cy1 = currentPoint.Y + 2 * (cy - currentPoint.Y) / 3;
+    float cx2 = cx1 + (x - currentPoint.X) / 3;
+    float cy2 = cy1 + (y - currentPoint.Y) / 3;
+    Gdip.GraphicsPath_AddBezier(handle, currentPoint.X, currentPoint.Y, cx1, cy1, cx2, cy2, x, y);
+    Gdip.GraphicsPath_GetLastPoint(handle, currentPoint);
+}
+
+/**
+ * Returns a string containing a concise, human-readable
+ * description of the receiver.
+ *
+ * @return a string representation of the receiver
+ */
+override public String toString() {
+    if (isDisposed()) return "Path {*DISPOSED*}";
+    return Format( "Path {{{}}", handle );
+}
+
+}