| /******************************************************************************* |
| * 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.wpf.*; |
| |
| /** |
| * 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 extends Resource { |
| |
| /** |
| * 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> |
| * |
| * @noreference This field is not intended to be referenced by clients. |
| */ |
| public int handle; |
| |
| int currentFigure, currentPoint; |
| |
| /** |
| * 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 Path (Device device) { |
| super(device); |
| handle = OS.gcnew_PathGeometry(); |
| if (handle == 0) 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 Path (Device device, Path path, float flatness) { |
| super(device); |
| if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| flatness = Math.max(0, flatness); |
| if (flatness == 0) { |
| handle = OS.PathGeometry_Clone(path.handle); |
| } else { |
| handle = OS.Geometry_GetFlattenedPathGeometry(path.handle, flatness, OS.ToleranceType_Absolute); |
| } |
| if (handle == 0) 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 Path (Device device, PathData data) { |
| this(device); |
| if (data == 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 == 0 || height == 0 || arcAngle == 0) return; |
| boolean isNegative = arcAngle < 0; |
| boolean isLargeAngle = arcAngle > 180 || arcAngle < -180; |
| arcAngle = arcAngle + startAngle; |
| if (isNegative) { |
| // swap angles |
| float tmp = startAngle; |
| startAngle = arcAngle; |
| arcAngle = tmp; |
| } |
| double x1 = Math.cos(startAngle * Math.PI / 180) * width/2.0 + x + width/2.0; |
| double y1 = -1 * Math.sin(startAngle * Math.PI / 180) * height/2.0 + y + height/2.0; |
| double x2 = Math.cos(arcAngle * Math.PI / 180) * width/2.0 + x + width/2.0; |
| double y2 = -1 * Math.sin(arcAngle * Math.PI / 180) * height/2.0 + y + height/2.0; |
| if (currentFigure == 0) { |
| currentFigure = OS.gcnew_PathFigure(); |
| int figures = OS.PathGeometry_Figures(handle); |
| OS.PathFigureCollection_Add(figures, currentFigure); |
| OS.GCHandle_Free(figures); |
| } |
| int startPoint = OS.gcnew_Point(x1, y1); |
| int endPoint = OS.gcnew_Point(x2, y2); |
| int segments = OS.PathFigure_Segments(currentFigure); |
| if (OS.PathSegmentCollection_Count(segments) != 0) { |
| int segment = OS.gcnew_LineSegment(startPoint, true); |
| OS.PathSegmentCollection_Add(segments, segment); |
| OS.GCHandle_Free(segment); |
| } else { |
| OS.PathFigure_StartPoint(currentFigure, startPoint); |
| } |
| if (arcAngle >= 360 || arcAngle <= -360) { |
| int rect = OS.gcnew_Rect(x, y, width, height); |
| int geometry = OS.gcnew_EllipseGeometry(rect); |
| OS.PathGeometry_AddGeometry(handle, geometry); |
| OS.GCHandle_Free(geometry); |
| OS.GCHandle_Free(rect); |
| OS.GCHandle_Free(currentFigure); |
| currentFigure = 0; |
| } else { |
| int size = OS.gcnew_Size(width / 2.0, height / 2.0); |
| int arc = OS.gcnew_ArcSegment(endPoint, size, 0, isLargeAngle, OS.SweepDirection_Clockwise, true); |
| OS.PathSegmentCollection_Add(segments, arc); |
| OS.GCHandle_Free(size); |
| OS.GCHandle_Free(arc); |
| } |
| OS.GCHandle_Free(segments); |
| OS.GCHandle_Free(startPoint); |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = endPoint; |
| } |
| |
| /** |
| * 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 == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| OS.PathGeometry_AddGeometry(handle, path.handle); |
| if (path.currentPoint != 0) { |
| currentPoint = OS.gcnew_Point(OS.Point_X(path.currentPoint), OS.Point_Y(path.currentPoint)); |
| } |
| int figures = OS.PathGeometry_Figures(handle); |
| int count = OS.PathFigureCollection_Count(figures); |
| OS.GCHandle_Free(figures); |
| if (count != 0) { |
| int figure = OS.PathGeometry_Figures(handle, count - 1); |
| if (!OS.PathFigure_IsClosed(figure)) { |
| currentFigure = figure; |
| return; |
| } |
| OS.GCHandle_Free(figure); |
| } |
| |
| } |
| |
| /** |
| * 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); |
| int rect = OS.gcnew_Rect(x, y, width, height); |
| int geometry = OS.gcnew_RectangleGeometry(rect); |
| OS.PathGeometry_AddGeometry(handle, geometry); |
| OS.GCHandle_Free(geometry); |
| OS.GCHandle_Free(rect); |
| if (currentFigure != 0) OS.GCHandle_Free(currentFigure); |
| currentFigure = 0; |
| int point = OS.gcnew_Point(x, y); |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = point; |
| |
| } |
| |
| /** |
| * 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 == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int length = string.length(); |
| char [] buffer = new char [length + 1]; |
| string.getChars (0, length, buffer, 0); |
| int str = OS.gcnew_String (buffer); |
| int culture = OS.CultureInfo_CurrentUICulture(); |
| int point = OS.gcnew_Point(x, y); |
| int brush = OS.Brushes_White(); |
| int text = OS.gcnew_FormattedText(str, culture, OS.FlowDirection_LeftToRight, font.handle, font.size, brush); |
| int geometry = OS.FormattedText_BuildGeometry(text, point); |
| OS.PathGeometry_AddGeometry(handle, geometry); |
| OS.GCHandle_Free(brush); |
| OS.GCHandle_Free(geometry); |
| OS.GCHandle_Free(culture); |
| OS.GCHandle_Free(str); |
| OS.GCHandle_Free(point); |
| OS.GCHandle_Free(text); |
| if (currentFigure != 0) OS.GCHandle_Free(currentFigure); |
| currentFigure = 0; |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = 0; |
| } |
| |
| /** |
| * 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); |
| if (currentFigure != 0) OS.PathFigure_IsClosed(currentFigure, true); |
| currentFigure = 0; |
| } |
| |
| /** |
| * 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 boolean contains(float x, float y, GC gc, boolean outline) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| gc.checkGC(GC.LINE_CAP | GC.LINE_JOIN | GC.LINE_STYLE | GC.LINE_WIDTH | GC.LINE_MITERLIMIT | GC.TRANSFORM); |
| boolean result; |
| int point = OS.gcnew_Point(x, y); |
| if (outline) { |
| result = OS.Geometry_StrokeContains(handle, gc.data.pen, point); |
| } else { |
| result = OS.Geometry_FillContains(handle, point); |
| } |
| OS.GCHandle_Free(point); |
| return result; |
| } |
| |
| /** |
| * 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); |
| int controlPoint1 = OS.gcnew_Point(cx1, cy1); |
| int controlPoint2 = OS.gcnew_Point(cx2, cy2); |
| int point = OS.gcnew_Point(x, y); |
| if (currentFigure == 0) newFigure(); |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = point; |
| int segment = OS.gcnew_BezierSegment(controlPoint1, controlPoint2, point, true); |
| int segments = OS.PathFigure_Segments(currentFigure); |
| OS.PathSegmentCollection_Add(segments, segment); |
| OS.GCHandle_Free(segments); |
| OS.GCHandle_Free(segment); |
| OS.GCHandle_Free(controlPoint1); |
| OS.GCHandle_Free(controlPoint2); |
| } |
| |
| void destroy() { |
| OS.GCHandle_Free(handle); |
| handle = 0; |
| if (currentFigure != 0) OS.GCHandle_Free(currentFigure); |
| currentFigure = 0; |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = 0; |
| } |
| |
| /** |
| * 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 == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (bounds.length < 4) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int rect = OS.PathGeometry_Bounds(handle); |
| bounds[0] = (float)OS.Rect_X(rect); |
| bounds[1] = (float)OS.Rect_Y(rect); |
| bounds[2] = (float)OS.Rect_Width(rect); |
| bounds[3] = (float)OS.Rect_Height(rect); |
| OS.GCHandle_Free(rect); |
| } |
| |
| /** |
| * 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 == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (point.length < 2) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| if (currentPoint != 0) { |
| point[0] = (float)OS.Point_X(currentPoint); |
| point[1] = (float)OS.Point_Y(currentPoint); |
| } else { |
| point[0] = point[1] = 0; |
| } |
| } |
| |
| /** |
| * 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); |
| byte[] types = new byte[128]; |
| float[] points = new float[128 * 2]; |
| int pointsIndex = 0, typesIndex = 0; |
| int figures = OS.PathGeometry_Figures(handle); |
| int figureCount = OS.PathFigureCollection_Count(figures); |
| OS.GCHandle_Free(figures); |
| for (int i = 0; i < figureCount; i++) { |
| int figure = OS.PathGeometry_Figures(handle, i); |
| int segments = OS.PathFigure_Segments(figure); |
| int segmentCount = OS.PathSegmentCollection_Count(segments); |
| OS.GCHandle_Free(segments); |
| for (int j = 0; j < segmentCount; j++) { |
| int segment = OS.PathFigure_Segments(figure, j); |
| int type = OS.Object_GetType(segment); |
| //TODO - need get points out of every segment |
| //TODO - need to convert ArcSegment to beziers |
| |
| |
| OS.GCHandle_Free(type); |
| OS.GCHandle_Free(segment); |
| } |
| OS.GCHandle_Free(figure); |
| } |
| if (typesIndex != types.length) { |
| byte[] newTypes = new byte[typesIndex]; |
| System.arraycopy(types, 0, newTypes, 0, typesIndex); |
| types = newTypes; |
| } |
| if (pointsIndex != points.length) { |
| float[] newPoints = new float[pointsIndex]; |
| System.arraycopy(points, 0, newPoints, 0, pointsIndex); |
| points = newPoints; |
| } |
| 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); |
| int point = OS.gcnew_Point(x, y); |
| if (currentFigure == 0) newFigure(); |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = point; |
| int segment = OS.gcnew_LineSegment(point, true); |
| int segments = OS.PathFigure_Segments(currentFigure); |
| OS.PathSegmentCollection_Add(segments, segment); |
| OS.GCHandle_Free(segments); |
| OS.GCHandle_Free(segment); |
| } |
| |
| 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 (except {@link #dispose()}) using the Path. |
| * |
| * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise |
| */ |
| public boolean isDisposed() { |
| return handle == 0; |
| } |
| |
| /** |
| * 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); |
| int point = OS.gcnew_Point(x, y); |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = point; |
| if (currentFigure != 0) { |
| int segments = OS.PathFigure_Segments(currentFigure); |
| int count = OS.PathSegmentCollection_Count(segments); |
| OS.GCHandle_Free(segments); |
| if (count == 0) { |
| OS.PathFigure_StartPoint(currentFigure, point); |
| return; |
| } |
| } |
| if (currentFigure != 0) OS.GCHandle_Free(currentFigure); |
| newFigure(); |
| } |
| |
| void newFigure() { |
| currentFigure = OS.gcnew_PathFigure(); |
| if (currentPoint != 0) { |
| OS.PathFigure_StartPoint(currentFigure, currentPoint); |
| } |
| int figures = OS.PathGeometry_Figures(handle); |
| OS.PathFigureCollection_Add(figures, currentFigure); |
| OS.GCHandle_Free(figures); |
| } |
| |
| /** |
| * 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); |
| int controlPoint = OS.gcnew_Point(cx, cy); |
| int point = OS.gcnew_Point(x, y); |
| if (currentFigure == 0) newFigure(); |
| if (currentPoint != 0) OS.GCHandle_Free(currentPoint); |
| currentPoint = point; |
| int segment = OS.gcnew_QuadraticBezierSegment(controlPoint, point, true); |
| int segments = OS.PathFigure_Segments(currentFigure); |
| OS.PathSegmentCollection_Add(segments, segment); |
| OS.GCHandle_Free(segments); |
| OS.GCHandle_Free(segment); |
| OS.GCHandle_Free(controlPoint); |
| } |
| |
| /** |
| * 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 "Path {*DISPOSED*}"; |
| return "Path {" + handle + "}"; |
| } |
| |
| } |