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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/layout/FormAttachment.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/layout/FormAttachment.java | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/layout/FormAttachment.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/layout/FormAttachment.java deleted file mode 100644 index d426a8a43e..0000000000 --- a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/layout/FormAttachment.java +++ /dev/null @@ -1,316 +0,0 @@ -/******************************************************************************* - * 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.layout; - -import org.eclipse.swt.*; -import org.eclipse.swt.widgets.*; - -/** - * Instances of this class are used to define the edges of a control - * within a <code>FormLayout</code>. - * <p> - * <code>FormAttachments</code> are set into the top, bottom, left, - * and right fields of the <code>FormData</code> for a control. - * For example: - * <pre> - * FormData data = new FormData(); - * data.top = new FormAttachment(0,5); - * data.bottom = new FormAttachment(100,-5); - * data.left = new FormAttachment(0,5); - * data.right = new FormAttachment(100,-5); - * button.setLayoutData(data); - * </pre> - * </p> - * <p> - * A <code>FormAttachment</code> defines where to attach the side of - * a control by using the equation, y = ax + b. The "a" term represents - * a fraction of the parent composite's width (from the left) or height - * (from the top). It can be defined using a numerator and denominator, - * or just a percentage value. If a percentage is used, the denominator - * is set to 100. The "b" term in the equation represents an offset, in - * pixels, from the attachment position. For example: - * <pre> - * FormAttachment attach = new FormAttachment (20, -5); - * </pre> - * specifies that the side to which the <code>FormAttachment</code> - * object belongs will lie at 20% of the parent composite, minus 5 pixels. - * </p> - * <p> - * Control sides can also be attached to another control. - * For example: - * <pre> - * FormAttachment attach = new FormAttachment (button, 10); - * </pre> - * specifies that the side to which the <code>FormAttachment</code> - * object belongs will lie in the same position as the adjacent side of - * the <code>button</code> control, plus 10 pixels. The control side can - * also be attached to the opposite side of the specified control. - * For example: - * <pre> - * FormData data = new FormData (); - * data.left = new FormAttachment (button, 0, SWT.LEFT); - * </pre> - * specifies that the left side of the control will lie in the same position - * as the left side of the <code>button</code> control. The control can also - * be attached in a position that will center the control on the specified - * control. For example: - * <pre> - * data.left = new FormAttachment (button, 0, SWT.CENTER); - * </pre> - * specifies that the left side of the control will be positioned so that it is - * centered between the left and right sides of the <code>button</code> control. - * If the alignment is not specified, the default is to attach to the adjacent side. - * </p> - * - * @see FormLayout - * @see FormData - * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> - * - * @since 2.0 - */ -public final class FormAttachment { - /** - * numerator specifies the numerator of the "a" term in the - * equation, y = ax + b, which defines the attachment. - */ - public int numerator; - - /** - * denominator specifies the denominator of the "a" term in the - * equation, y = ax + b, which defines the attachment. - * - * The default value is 100. - */ - public int denominator = 100; - - /** - * offset specifies the offset, in pixels, of the control side - * from the attachment position. - * If the offset is positive, then the control side is offset - * to the right of or below the attachment position. If it is - * negative, then the control side is offset to the left of or - * above the attachment position. - * - * This is equivalent to the "b" term in the equation y = ax + b. - * The default value is 0. - */ - public int offset; - - /** - * control specifies the control to which the control side is - * attached. - */ - public Control control; - - /** - * alignment specifies the alignment of the control side that is - * attached to a control. - * <p> - * For top and bottom attachments, TOP, BOTTOM and CENTER are used. For left - * and right attachments, LEFT, RIGHT and CENTER are used. If any other case - * occurs, the default will be used instead. - * </p> - * - * <br>Possible values are: <ul> - * <li>{@link SWT#TOP}: Attach the side to the top side of the specified control.</li> - * <li>{@link SWT#BOTTOM}: Attach the side to the bottom side of the specified control.</li> - * <li>{@link SWT#LEFT}: Attach the side to the left side of the specified control.</li> - * <li>{@link SWT#RIGHT}: Attach the side to the right side of the specified control.</li> - * <li>{@link SWT#CENTER}: Attach the side at a position which will center the control on the specified control.</li> - * <li>{@link SWT#DEFAULT}: Attach the side to the adjacent side of the specified control.</li> - * </ul> - */ - public int alignment; - -/** - * Constructs a new instance of this class. - * Since no numerator, denominator or offset is specified, - * the attachment is treated as a percentage of the form. - * The numerator is zero, the denominator is 100 and the - * offset is zero. - * - * @since 3.2 - */ -public FormAttachment () { -} - -/** - * Constructs a new instance of this class given a numerator - * Since no denominator or offset is specified, the default - * is to treat the numerator as a percentage of the form, with a - * denominator of 100. The offset is zero. - * - * @param numerator the percentage of the position - * - * @since 3.0 - */ -public FormAttachment (int numerator) { - this (numerator, 100, 0); -} - -/** - * Constructs a new instance of this class given a numerator - * and an offset. Since no denominator is specified, the default - * is to treat the numerator as a percentage of the form, with a - * denominator of 100. - * - * @param numerator the percentage of the position - * @param offset the offset of the side from the position - */ -public FormAttachment (int numerator, int offset) { - this (numerator, 100, offset); -} - -/** - * Constructs a new instance of this class given a numerator - * and denominator and an offset. The position of the side is - * given by the fraction of the form defined by the numerator - * and denominator. - * - * @param numerator the numerator of the position - * @param denominator the denominator of the position - * @param offset the offset of the side from the position - */ -public FormAttachment (int numerator, int denominator, int offset) { - if (denominator == 0) SWT.error (SWT.ERROR_CANNOT_BE_ZERO); - this.numerator = numerator; - this.denominator = denominator; - this.offset = offset; -} - -/** - * Constructs a new instance of this class given a control. - * Since no alignment is specified, the default alignment is - * to attach the side to the adjacent side of the specified - * control. Since no offset is specified, an offset of 0 is - * used. - * - * @param control the control the side is attached to - */ -public FormAttachment (Control control) { - this (control, 0, SWT.DEFAULT); -} - -/** - * Constructs a new instance of this class given a control - * and an offset. Since no alignment is specified, the default - * alignment is to attach the side to the adjacent side of the - * specified control. - * - * @param control the control the side is attached to - * @param offset the offset of the side from the control - */ -public FormAttachment (Control control, int offset) { - this (control, offset, SWT.DEFAULT); -} - -/** - * Constructs a new instance of this class given a control, - * an offset and an alignment. The possible alignment values are: - * <dl> - * <dt><b>{@link SWT#TOP}</b></dt> - * <dd>the side will be attached to the top side of the specified control</dd> - * <dt><b>{@link SWT#BOTTOM}</b></dt> - * <dd>the side will be attached to the bottom side of the specified control</dd> - * <dt><b>{@link SWT#LEFT}</b></dt> - * <dd>the side will be attached to the left side of the specified control</dd> - * <dt><b>{@link SWT#RIGHT}</b></dt> - * <dd>the side will be attached to the right side of the specified control</dd> - * <dt><b>{@link SWT#CENTER}</b></dt> - * <dd>the side will be centered on the same side of the specified control</dd> - * <dt><b>{@link SWT#DEFAULT}</b></dt> - * <dd>the side will be attached to the adjacent side of the specified control</dd> - * </dl> - * - * @param control the control the side is attached to - * @param offset the offset of the side from the control - * @param alignment the alignment of the side to the control it is attached to, - * one of TOP, BOTTOM, LEFT, RIGHT, CENTER, or DEFAULT - */ -public FormAttachment (Control control, int offset, int alignment) { - this.control = control; - this.offset = offset; - this.alignment = alignment; -} - -FormAttachment divide (int value) { - return new FormAttachment (numerator, denominator * value, offset / value); -} - -int gcd (int m, int n) { - int temp; - m = Math.abs (m); - n = Math.abs (n); - if (m < n) { - temp = m; - m = n; - n = temp; - } - while (n != 0){ - temp = m; - m = n; - n = temp % n; - } - return m; -} - -FormAttachment minus (FormAttachment attachment) { - FormAttachment solution = new FormAttachment (); - solution.numerator = numerator * attachment.denominator - denominator * attachment.numerator; - solution.denominator = denominator * attachment.denominator; - int gcd = gcd (solution.denominator, solution.numerator); - solution.numerator = solution.numerator / gcd; - solution.denominator = solution.denominator / gcd; - solution.offset = offset - attachment.offset; - return solution; -} - -FormAttachment minus (int value) { - return new FormAttachment (numerator, denominator, offset - value); -} - -FormAttachment plus (FormAttachment attachment) { - FormAttachment solution = new FormAttachment (); - solution.numerator = numerator * attachment.denominator + denominator * attachment.numerator; - solution.denominator = denominator * attachment.denominator; - int gcd = gcd (solution.denominator, solution.numerator); - solution.numerator = solution.numerator / gcd; - solution.denominator = solution.denominator / gcd; - solution.offset = offset + attachment.offset; - return solution; -} - -FormAttachment plus (int value) { - return new FormAttachment (numerator, denominator, offset + value); -} - -int solveX (int value) { - if (denominator == 0) SWT.error (SWT.ERROR_CANNOT_BE_ZERO); - return ((numerator * value) / denominator) + offset; -} - -int solveY (int value) { - if (numerator == 0) SWT.error (SWT.ERROR_CANNOT_BE_ZERO); - return (value - offset) * denominator / numerator; -} - -/** - * Returns a string containing a concise, human-readable - * description of the receiver. - * - * @return a string representation of the FormAttachment - */ -public String toString () { - String string = control != null ? control.toString () : numerator + "/" + denominator; - return "{y = (" + string + (offset >= 0 ? ")x + " + offset: ")x - " + (-offset))+"}"; -} - -} |