Mercurial > projects > dwt-win
view dwt/graphics/Path.d @ 48:9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Sun, 03 Feb 2008 01:14:54 +0100 |
parents | fa34113bf4be |
children | 0405e18fec7f |
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/******************************************************************************* * 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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwt.graphics.Path; import dwt.internal.gdip.Gdip; import dwt.DWT; import dwt.DWTError; import dwt.DWTException; import dwt.internal.gdip.Gdip; import dwt.internal.win32.OS; import dwt.graphics.Resource; import dwt.graphics.Device; import dwt.graphics.Font; import dwt.graphics.GC; import dwt.graphics.GCData; import dwt.graphics.PathData; import dwt.dwthelper.System; import tango.text.convert.Format; /** * 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> * * @since 3.1 */ public class Path : 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 DWT * public API. It is marked public only so that it can be shared * within the packages provided by DWT. It is not available on all * platforms and should never be accessed from application code. * </p> */ public Gdip.GraphicsPath* 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 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 path could not be obtained</li> * </ul> * * @see #dispose() */ public this (Device device) { if (device is null) device = Device.getDevice(); if (device is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); this.device = device; device.checkGDIP(); handle = Gdip.GraphicsPath_new(Gdip.FillModeAlternate); if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES); if (device.tracking) device.new_Object(this); } /** * 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 DWTException <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()) DWT.error(DWT.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_AddArc(handle, x, y, width, height, -startAngle, -arcAngle); } else { auto path = Gdip.GraphicsPath_new(Gdip.FillModeAlternate); if (path is null) DWT.error(DWT.ERROR_NO_HANDLES); auto matrix = Gdip.Matrix_new(width, 0, 0, height, x, y); if (matrix is null) DWT.error(DWT.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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void addPath(Path path) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (path.isDisposed()) DWT.error(DWT.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 DWTException <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()) DWT.error(DWT.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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void addString(char[] string, float x, float y, Font font) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (font is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (font.isDisposed()) DWT.error(DWT.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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void close() { if (isDisposed()) DWT.error(DWT.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 DWTException <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()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (gc is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (gc.isDisposed()) DWT.error(DWT.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 DWTException <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()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); Gdip.GraphicsPath_AddBezier(handle, currentPoint.X, currentPoint.Y, cx1, cy1, cx2, cy2, x, y); Gdip.GraphicsPath_GetLastPoint(handle, currentPoint); } /** * Disposes of the operating system resources associated with * the Path. Applications must dispose of all Paths that * they allocate. */ override public void dispose() { if (handle is null) return; if (device.isDisposed()) return; Gdip.GraphicsPath_delete(handle); handle = null; if (device.tracking) device.dispose_Object(this); device = 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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void getBounds(float[] bounds) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (bounds is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (bounds.length < 4) DWT.error(DWT.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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void getCurrentPoint(float[] point) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); if (point is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); if (point.length < 2) DWT.error(DWT.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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> * * @see PathData */ public PathData getPathData() { if (isDisposed()) DWT.error(DWT.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, count); Gdip.GraphicsPath_GetPathPoints(handle, 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++] = DWT.PATH_MOVE_TO; close = (type & Gdip.PathPointTypeCloseSubpath) !is 0; index += 1; break; case Gdip.PathPointTypeLine: types[typesIndex++] = DWT.PATH_LINE_TO; close = (type & Gdip.PathPointTypeCloseSubpath) !is 0; index += 1; break; case Gdip.PathPointTypeBezier: types[typesIndex++] = DWT.PATH_CUBIC_TO; close = (gdipTypes[index + 2] & Gdip.PathPointTypeCloseSubpath) !is 0; index += 3; break; default: index++; } if (close) { types[typesIndex++] = DWT.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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void lineTo(float x, float y) { if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); Gdip.GraphicsPath_AddLine(handle, currentPoint.X, currentPoint.Y, x, y); Gdip.GraphicsPath_GetLastPoint(handle, currentPoint); } /** * 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 DWTException <ul> * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> * </ul> */ public void moveTo(float x, float y) { if (isDisposed()) DWT.error(DWT.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 DWTException <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()) DWT.error(DWT.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 char[] toString() { if (isDisposed()) return "Path {*DISPOSED*}"; return Format( "Path {{{}}", handle ); } }