Mercurial > projects > dwt2
diff org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/graphics/Transform.d @ 0:6dd524f61e62
add dwt win and basic java stuff
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 02 Mar 2009 14:44:16 +0100 |
parents | |
children | 6bf2837c50fe |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/graphics/Transform.d Mon Mar 02 14:44:16 2009 +0100 @@ -0,0 +1,379 @@ +/******************************************************************************* + * 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.Transform; + +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.graphics.Resource; +import org.eclipse.swt.graphics.Device; + +import tango.text.convert.Format; +import java.lang.all; + +/** + * Instances of this class represent transformation matrices for + * points expressed as (x, y) pairs of floating point numbers. + * <p> + * Application code must explicitly invoke the <code>Transform.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/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 Transform : Resource { + alias Resource.init_ init_; + /** + * the OS resource for the Transform + * (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.Matrix handle; + +/** + * Constructs a new identity Transform. + * <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 Transform + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if 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 Transform could not be obtained</li> + * </ul> + * + * @see #dispose() + */ +public this (Device device) { + this(device, 1, 0, 0, 1, 0, 0); +} + +/** + * Constructs a new Transform given an array of elements that represent the + * matrix that describes the transformation. + * <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 Transform + * @param elements an array of floats that describe the transformation matrix + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device, or the elements array is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the elements array is too small to hold the matrix values</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 Transform could not be obtained</li> + * </ul> + * + * @see #dispose() + */ +public this(Device device, float[] elements) { + this (device, checkTransform(elements)[0], elements[1], elements[2], elements[3], elements[4], elements[5]); +} + +/** + * Constructs a new Transform given all of the elements that represent the + * matrix that describes the transformation. + * <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 Transform + * @param m11 the first element of the first row of the matrix + * @param m12 the second element of the first row of the matrix + * @param m21 the first element of the second row of the matrix + * @param m22 the second element of the second row of the matrix + * @param dx the third element of the first row of the matrix + * @param dy the third element of the second row of the matrix + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if 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 Transform could not be obtained</li> + * </ul> + * + * @see #dispose() + */ +public this (Device device, float m11, float m12, float m21, float m22, float dx, float dy) { + super(device); + this.device.checkGDIP(); + handle = Gdip.Matrix_new(m11, m12, m21, m22, dx, dy); + if (handle is null) SWT.error(SWT.ERROR_NO_HANDLES); + init_(); +} + +static float[] checkTransform(float[] elements) { + if (elements is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (elements.length < 6) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + return elements; +} + +void destroy() { + Gdip.Matrix_delete(handle); + handle = null; +} + +/** + * Fills the parameter with the values of the transformation matrix + * that the receiver represents, in the order {m11, m12, m21, m22, dx, dy}. + * + * @param elements array to hold the matrix values + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + * @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 matrix values</li> + * </ul> + */ +public void getElements(float[] elements) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (elements is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (elements.length < 6) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + Gdip.Matrix_GetElements(handle, elements.ptr); +} + +/** + * Modifies the receiver such that the matrix it represents becomes the + * identity matrix. + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + * + * @since 3.4 + */ +public void identity() { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + Gdip.Matrix_SetElements(handle, 1, 0, 0, 1, 0, 0); +} + +/** + * Modifies the receiver such that the matrix it represents becomes + * the mathematical inverse of the matrix it previously represented. + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_CANNOT_INVERT_MATRIX - if the matrix is not invertible</li> + * </ul> + */ +public void invert() { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (Gdip.Matrix_Invert(handle) !is 0) SWT.error(SWT.ERROR_CANNOT_INVERT_MATRIX); +} + +/** + * Returns <code>true</code> if the Transform has been disposed, + * and <code>false</code> otherwise. + * <p> + * This method gets the dispose state for the Transform. + * When a Transform has been disposed, it is an error to + * invoke any other method using the Transform. + * + * @return <code>true</code> when the Transform is disposed, and <code>false</code> otherwise + */ +override public bool isDisposed() { + return handle is null; +} + +/** + * Returns <code>true</code> if the Transform represents the identity matrix + * and false otherwise. + * + * @return <code>true</code> if the receiver is an identity Transform, and <code>false</code> otherwise + */ +public bool isIdentity() { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + return cast(bool) Gdip.Matrix_IsIdentity(handle); +} + +/** + * Modifies the receiver such that the matrix it represents becomes the + * the result of multiplying the matrix it previously represented by the + * argument. + * + * @param matrix the matrix to multiply the receiver by + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + * @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> + */ +public void multiply(Transform matrix) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (matrix is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (matrix.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + Gdip.Matrix_Multiply(handle, matrix.handle, Gdip.MatrixOrderPrepend); +} + +/** + * Modifies the receiver so that it represents a transformation that is + * equivalent to its previous transformation rotated by the specified angle. + * The angle is specified in degrees and for the identity transform 0 degrees + * is at the 3 o'clock position. A positive value indicates a clockwise rotation + * while a negative value indicates a counter-clockwise rotation. + * + * @param angle the angle to rotate the transformation by + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + */ +public void rotate(float angle) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + Gdip.Matrix_Rotate(handle, angle, Gdip.MatrixOrderPrepend); +} + +/** + * Modifies the receiver so that it represents a transformation that is + * equivalent to its previous transformation scaled by (scaleX, scaleY). + * + * @param scaleX the amount to scale in the X direction + * @param scaleY the amount to scale in the Y direction + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + */ +public void scale(float scaleX, float scaleY) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + Gdip.Matrix_Scale(handle, scaleX, scaleY, Gdip.MatrixOrderPrepend); +} + +/** + * Modifies the receiver to represent a new transformation given all of + * the elements that represent the matrix that describes that transformation. + * + * @param m11 the first element of the first row of the matrix + * @param m12 the second element of the first row of the matrix + * @param m21 the first element of the second row of the matrix + * @param m22 the second element of the second row of the matrix + * @param dx the third element of the first row of the matrix + * @param dy the third element of the second row of the matrix + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + */ +public void setElements(float m11, float m12, float m21, float m22, float dx, float dy) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + Gdip.Matrix_SetElements(handle, m11, m12, m21, m22, dx, dy); +} + +/** + * Modifies the receiver so that it represents a transformation that is + * equivalent to its previous transformation sheared by (shearX, shearY). + * + * @param shearX the shear factor in the X direction + * @param shearY the shear factor in the Y direction + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + * + * @since 3.4 + */ +public void shear(float shearX, float shearY) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + Gdip.Matrix_Shear(handle, shearX, shearY, Gdip.MatrixOrderPrepend); +} + +/** + * Given an array containing points described by alternating x and y values, + * modify that array such that each point has been replaced with the result of + * applying the transformation represented by the receiver to that point. + * + * @param pointArray an array of alternating x and y values to be transformed + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the point array is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + */ +public void transform(float[] pointArray) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (pointArray is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + Gdip.Matrix_TransformPoints(handle, cast(Gdip.PointF*)pointArray.ptr, pointArray.length / 2); +} + +/** + * Modifies the receiver so that it represents a transformation that is + * equivalent to its previous transformation translated by (offsetX, offsetY). + * + * @param offsetX the distance to translate in the X direction + * @param offsetY the distance to translate in the Y direction + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + */ +public void translate(float offsetX, float offsetY) { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + Gdip.Matrix_Translate(handle, offsetX, offsetY, Gdip.MatrixOrderPrepend); +} + +/** + * 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 "Transform {*DISPOSED*}"; + float[6] elements; + getElements(elements); + return Format("Transform {{{},{},{},{},{}}", elements [0], elements [1], elements [2], elements [3], elements [4], elements [5] ); +} + +}