| /******************************************************************************* |
| * 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.internal.wpf.*; |
| import org.eclipse.swt.*; |
| |
| /** |
| * Instances of this class represent areas of an x-y coordinate |
| * system that are aggregates of the areas covered by a number |
| * of polygons. |
| * <p> |
| * Application code must explicitly invoke the <code>Region.dispose()</code> |
| * method to release the operating system resources managed by each instance |
| * when those instances are no longer required. |
| * </p> |
| * |
| * @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> |
| */ |
| |
| public final class Region extends Resource { |
| |
| /** |
| * the OS resource for the region |
| * (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 int handle; |
| |
| /** |
| * Constructs a new empty region. |
| * |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle could not be obtained for region creation</li> |
| * </ul> |
| */ |
| public Region () { |
| this(null); |
| } |
| |
| /** |
| * Constructs a new empty region. |
| * <p> |
| * You must dispose the region when it is no longer required. |
| * </p> |
| * |
| * @param device the device on which to allocate the region |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle could not be obtained for region creation</li> |
| * </ul> |
| * |
| * @see #dispose |
| * |
| * @since 3.0 |
| */ |
| public Region (Device device) { |
| super(device); |
| handle = OS.gcnew_GeometryGroup(); |
| if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| init(); |
| } |
| |
| /** |
| * Constructs a new region given a handle to the operating |
| * system resources that it should represent. |
| * |
| * @param handle the handle for the result |
| */ |
| Region(Device device, int handle) { |
| super(device); |
| this.handle = handle; |
| } |
| |
| /** |
| * Adds the given polygon to the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param pointArray points that describe the polygon to merge with the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.0 |
| * |
| */ |
| public void add (int[] pointArray) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| combine(pointArray, OS.GeometryCombineMode_Union); |
| } |
| |
| |
| |
| /** |
| * Adds the given rectangle to the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param rect the rectangle to merge with the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void add (Rectangle rect) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| add (rect.x, rect.y, rect.width, rect.height); |
| } |
| |
| /** |
| * Adds the given rectangle to the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param x the x coordinate of the rectangle |
| * @param y the y coordinate of the rectangle |
| * @param width the width coordinate of the rectangle |
| * @param height the height coordinate of the rectangle |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.1 |
| */ |
| public void add (int x, int y, int width, int height) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0 || height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int rect = OS.gcnew_Rect(x, y, width, height); |
| int geometry1 = OS.gcnew_RectangleGeometry(rect); |
| int geometries = OS.GeometryGroup_Children(handle); |
| if (OS.GeometryCollection_Count(geometries) == 0) { |
| OS.GeometryCollection_Add(geometries, geometry1); |
| } else { |
| int geometry2 = OS.GeometryGroup_Children(handle, 0); |
| int geometry3 = OS.gcnew_CombinedGeometry(OS.GeometryCombineMode_Union, geometry1, geometry2); |
| OS.GeometryCollection_Remove(geometries, geometry2); |
| OS.GeometryCollection_Add(geometries, geometry3); |
| OS.GCHandle_Free(geometry2); |
| OS.GCHandle_Free(geometry3); |
| } |
| OS.GCHandle_Free(rect); |
| OS.GCHandle_Free(geometry1); |
| OS.GCHandle_Free(geometries); |
| } |
| |
| /** |
| * Adds all of the polygons which make up the area covered |
| * by the argument to the collection of polygons the receiver |
| * maintains to describe its area. |
| * |
| * @param region the region to merge |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void add (Region region) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (region == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (region.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int geometries = OS.GeometryGroup_Children(handle); |
| if (OS.GeometryCollection_Count(geometries) == 0) { |
| OS.GeometryCollection_Add(geometries, region.handle); |
| } else { |
| int geometry2 = OS.GeometryGroup_Children(handle, 0); |
| int geometry3 = OS.gcnew_CombinedGeometry(OS.GeometryCombineMode_Union, region.handle, geometry2); |
| OS.GeometryCollection_Remove(geometries, geometry2); |
| OS.GeometryCollection_Add(geometries, geometry3); |
| OS.GCHandle_Free(geometry2); |
| OS.GCHandle_Free(geometry3); |
| } |
| OS.GCHandle_Free(geometries); |
| } |
| |
| |
| void combine (int[] pointArray, int mode) { |
| if (pointArray.length < 4) return; |
| int list = OS.gcnew_PointCollection(pointArray.length / 2); |
| for (int i = 2; i < pointArray.length; i += 2) { |
| int point = OS.gcnew_Point(pointArray[i], pointArray[i + 1]); |
| OS.PointCollection_Add(list, point); |
| OS.GCHandle_Free(point); |
| } |
| int poly = OS.gcnew_PolyLineSegment(list, true); |
| OS.GCHandle_Free(list); |
| int figure = OS.gcnew_PathFigure(); |
| int startPoint = OS.gcnew_Point(pointArray[0], pointArray[1]); |
| OS.PathFigure_StartPoint(figure, startPoint); |
| OS.PathFigure_IsClosed(figure, true); |
| int segments = OS.PathFigure_Segments(figure); |
| OS.PathSegmentCollection_Add(segments, poly); |
| int path = OS.gcnew_PathGeometry(); |
| int figures = OS.PathGeometry_Figures(path); |
| OS.PathFigureCollection_Add(figures, figure); |
| int geometries = OS.GeometryGroup_Children(handle); |
| if (OS.GeometryCollection_Count(geometries) == 0) { |
| if (mode == OS.GeometryCombineMode_Union) OS.GeometryCollection_Add(geometries, path); |
| } else { |
| int geometry2 = OS.GeometryGroup_Children(handle, 0); |
| int geometry3 = OS.gcnew_CombinedGeometry(mode, geometry2, path); |
| OS.GeometryCollection_Remove(geometries, geometry2); |
| OS.GeometryCollection_Add(geometries, geometry3); |
| OS.GCHandle_Free(geometry2); |
| OS.GCHandle_Free(geometry3); |
| } |
| OS.GCHandle_Free(geometries); |
| OS.GCHandle_Free(figures); |
| OS.GCHandle_Free(path); |
| OS.GCHandle_Free(segments); |
| OS.GCHandle_Free(figure); |
| OS.GCHandle_Free(startPoint); |
| OS.GCHandle_Free(poly); |
| } |
| |
| /** |
| * Returns <code>true</code> if the point specified by the |
| * arguments is inside the area specified by the receiver, |
| * and <code>false</code> otherwise. |
| * |
| * @param x the x coordinate of the point to test for containment |
| * @param y the y coordinate of the point to test for containment |
| * @return <code>true</code> if the region contains the point and <code>false</code> otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean contains (int x, int y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| int point = OS.gcnew_Point(x, y); |
| boolean result = OS.Geometry_FillContains(handle, point); |
| OS.GCHandle_Free(point); |
| return result; |
| } |
| |
| /** |
| * Returns <code>true</code> if the given point is inside the |
| * area specified by the receiver, and <code>false</code> |
| * otherwise. |
| * |
| * @param pt the point to test for containment |
| * @return <code>true</code> if the region contains the point and <code>false</code> otherwise |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean contains (Point pt) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (pt == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| return contains(pt.x, pt.y); |
| } |
| |
| void destroy() { |
| OS.GCHandle_Free(handle); |
| handle = 0; |
| } |
| |
| /** |
| * 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 (this == object) return true; |
| if (!(object instanceof Region)) return false; |
| Region rgn = (Region)object; |
| return handle == rgn.handle; |
| } |
| |
| /** |
| * Returns a rectangle which represents the rectangular |
| * union of the collection of polygons the receiver |
| * maintains to describe its area. |
| * |
| * @return a bounding rectangle for the region |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see Rectangle#union |
| */ |
| public Rectangle getBounds() { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (OS.Geometry_IsEmpty(handle)) return new Rectangle(0, 0, 0, 0); |
| int rect = OS.Geometry_Bounds(handle); |
| Rectangle result = new Rectangle((int)OS.Rect_X(rect), (int)OS.Rect_Y(rect), (int)OS.Rect_Width(rect), (int)OS.Rect_Height(rect)); |
| OS.GCHandle_Free(rect); |
| return result; |
| } |
| |
| /** |
| * Returns an integer hash code for the receiver. Any two |
| * objects that return <code>true</code> when passed to |
| * <code>equals</code> must return the same value for this |
| * method. |
| * |
| * @return the receiver's hash |
| * |
| * @see #equals |
| */ |
| public int hashCode () { |
| return handle; |
| } |
| |
| /** |
| * Intersects the given rectangle to the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param rect the rectangle to intersect with the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.0 |
| */ |
| public void intersect (Rectangle rect) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| intersect (rect.x, rect.y, rect.width, rect.height); |
| } |
| |
| /** |
| * Intersects the given rectangle to the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param x the x coordinate of the rectangle |
| * @param y the y coordinate of the rectangle |
| * @param width the width coordinate of the rectangle |
| * @param height the height coordinate of the rectangle |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.1 |
| */ |
| public void intersect (int x, int y, int width, int height) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0 || height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int rect = OS.gcnew_Rect(x, y, width, height); |
| int geometry1 = OS.gcnew_RectangleGeometry(rect); |
| int geometries = OS.GeometryGroup_Children(handle); |
| if (OS.GeometryCollection_Count(geometries) != 0) { |
| int geometry2 = OS.GeometryGroup_Children(handle, 0); |
| int geometry3 = OS.gcnew_CombinedGeometry(OS.GeometryCombineMode_Intersect, geometry1, geometry2); |
| OS.GeometryCollection_Remove(geometries, geometry2); |
| OS.GeometryCollection_Add(geometries, geometry3); |
| OS.GCHandle_Free(geometry2); |
| OS.GCHandle_Free(geometry3); |
| } |
| OS.GCHandle_Free(rect); |
| OS.GCHandle_Free(geometry1); |
| OS.GCHandle_Free(geometries); |
| } |
| |
| /** |
| * Intersects all of the polygons which make up the area covered |
| * by the argument to the collection of polygons the receiver |
| * maintains to describe its area. |
| * |
| * @param region the region to intersect |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.0 |
| */ |
| public void intersect (Region region) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (region == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (region.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int geometries = OS.GeometryGroup_Children(handle); |
| if (OS.GeometryCollection_Count(geometries) != 0) { |
| int geometry2 = OS.GeometryGroup_Children(handle, 0); |
| int geometry3 = OS.gcnew_CombinedGeometry(OS.GeometryCombineMode_Intersect, region.handle, geometry2); |
| OS.GeometryCollection_Remove(geometries, geometry2); |
| OS.GeometryCollection_Add(geometries, geometry3); |
| OS.GCHandle_Free(geometry2); |
| OS.GCHandle_Free(geometry3); |
| } |
| OS.GCHandle_Free(geometries); |
| } |
| |
| /** |
| * Returns <code>true</code> if the rectangle described by the |
| * arguments intersects with any of the polygons the receiver |
| * maintains to describe its area, and <code>false</code> otherwise. |
| * |
| * @param x the x coordinate of the origin of the rectangle |
| * @param y the y coordinate of the origin of the rectangle |
| * @param width the width of the rectangle |
| * @param height the height of the rectangle |
| * @return <code>true</code> if the rectangle intersects with the receiver, and <code>false</code> otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see Rectangle#intersects(Rectangle) |
| */ |
| public boolean intersects (int x, int y, int width, int height) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| int rect = OS.gcnew_Rect(x, y, width, height); |
| int geometry = OS.gcnew_RectangleGeometry(rect); |
| int result = OS.Geometry_FillContainsWithDetail(handle, geometry); |
| OS.GCHandle_Free(geometry); |
| OS.GCHandle_Free(rect); |
| return result != OS.IntersectionDetail_Empty; |
| } |
| |
| /** |
| * Returns <code>true</code> if the given rectangle intersects |
| * with any of the polygons the receiver maintains to describe |
| * its area and <code>false</code> otherwise. |
| * |
| * @param rect the rectangle to test for intersection |
| * @return <code>true</code> if the rectangle intersects with the receiver, and <code>false</code> otherwise |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see Rectangle#intersects(Rectangle) |
| */ |
| public boolean intersects (Rectangle rect) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| return intersects(rect.x, rect.y, rect.width, rect.height); |
| } |
| |
| /** |
| * Returns <code>true</code> if the region has been disposed, |
| * and <code>false</code> otherwise. |
| * <p> |
| * This method gets the dispose state for the region. |
| * When a region has been disposed, it is an error to |
| * invoke any other method using the region. |
| * |
| * @return <code>true</code> when the region is disposed, and <code>false</code> otherwise |
| */ |
| public boolean isDisposed() { |
| return handle == 0; |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver does not cover any |
| * area in the (x, y) coordinate plane, and <code>false</code> if |
| * the receiver does cover some area in the plane. |
| * |
| * @return <code>true</code> if the receiver is empty, and <code>false</code> otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean isEmpty () { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return OS.Geometry_IsEmpty(handle); |
| } |
| |
| /** |
| * Subtracts the given polygon from the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param pointArray points that describe the polygon to merge with the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.0 |
| */ |
| public void subtract (int[] pointArray) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| combine(pointArray, OS.GeometryCombineMode_Exclude); |
| } |
| |
| /** |
| * Subtracts the given rectangle from the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param rect the rectangle to subtract from the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.0 |
| */ |
| public void subtract (Rectangle rect) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| subtract (rect.x, rect.y, rect.width, rect.height); |
| } |
| |
| /** |
| * Subtracts the given rectangle from the collection of polygons |
| * the receiver maintains to describe its area. |
| * |
| * @param x the x coordinate of the rectangle |
| * @param y the y coordinate of the rectangle |
| * @param width the width coordinate of the rectangle |
| * @param height the height coordinate of the rectangle |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.1 |
| */ |
| public void subtract (int x, int y, int width, int height) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width < 0 || height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int rect = OS.gcnew_Rect(x, y, width, height); |
| int geometry1 = OS.gcnew_RectangleGeometry(rect); |
| int geometries = OS.GeometryGroup_Children(handle); |
| if (OS.GeometryCollection_Count(geometries) != 0) { |
| int geometry2 = OS.GeometryGroup_Children(handle, 0); |
| int geometry3 = OS.gcnew_CombinedGeometry(OS.GeometryCombineMode_Exclude, geometry2, geometry1); |
| OS.GeometryCollection_Remove(geometries, geometry2); |
| OS.GeometryCollection_Add(geometries, geometry3); |
| OS.GCHandle_Free(geometry2); |
| OS.GCHandle_Free(geometry3); |
| } |
| OS.GCHandle_Free(rect); |
| OS.GCHandle_Free(geometry1); |
| OS.GCHandle_Free(geometries); |
| } |
| |
| /** |
| * Subtracts all of the polygons which make up the area covered |
| * by the argument from the collection of polygons the receiver |
| * maintains to describe its area. |
| * |
| * @param region the region to subtract |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.0 |
| */ |
| public void subtract (Region region) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (region == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (region.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int geometries = OS.GeometryGroup_Children(handle); |
| if (OS.GeometryCollection_Count(geometries) != 0) { |
| int geometry2 = OS.GeometryGroup_Children(handle, 0); |
| int geometry3 = OS.gcnew_CombinedGeometry(OS.GeometryCombineMode_Exclude, geometry2, region.handle); |
| OS.GeometryCollection_Remove(geometries, geometry2); |
| OS.GeometryCollection_Add(geometries, geometry3); |
| OS.GCHandle_Free(geometry2); |
| OS.GCHandle_Free(geometry3); |
| } |
| OS.GCHandle_Free(geometries); |
| } |
| |
| /** |
| * Translate all of the polygons the receiver maintains to describe |
| * its area by the specified point. |
| * |
| * @param x the x coordinate of the point to translate |
| * @param y the y coordinate of the point to translate |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.1 |
| */ |
| public void translate (int x, int y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| int transform1 = OS.Geometry_Transform(handle); |
| int transform2 = OS.gcnew_TranslateTransform(x, y); |
| int transform = OS.gcnew_TransformGroup(); |
| int transforms = OS.TransformGroup_Children(transform); |
| OS.TransformCollection_Add(transforms, transform1); |
| OS.TransformCollection_Add(transforms, transform2); |
| OS.Geometry_Transform(handle, transform); |
| OS.GCHandle_Free(transform1); |
| OS.GCHandle_Free(transform2); |
| OS.GCHandle_Free(transform); |
| OS.GCHandle_Free(transforms); |
| } |
| |
| /** |
| * Translate all of the polygons the receiver maintains to describe |
| * its area by the specified point. |
| * |
| * @param pt the point to translate |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @since 3.1 |
| */ |
| public void translate (Point pt) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (pt == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| translate (pt.x, pt.y); |
| } |
| |
| /** |
| * 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 "Region {*DISPOSED*}"; |
| return "Region {" + handle + "}"; |
| } |
| |
| /** |
| * Invokes platform specific functionality to allocate a new region. |
| * <p> |
| * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
| * API for <code>Region</code>. 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 called from |
| * application code. |
| * </p> |
| * |
| * @param device the device on which to allocate the region |
| * @param handle the handle for the region |
| * @return a new region object containing the specified device and handle |
| */ |
| public static Region wpf_new(Device device, int handle) { |
| return new Region(device, handle); |
| } |
| |
| } |