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/*******************************************************************************
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* Copyright (c) 2000, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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* Asim Ullah - Ported for use in draw2d (c.f Bugzilla 71684).[Sep 10, 2004]
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*******************************************************************************/
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package org.eclipse.draw2d;
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import org.eclipse.draw2d.geometry.Dimension;
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import org.eclipse.draw2d.rap.swt.SWT;
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/**
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* <code>GridData</code> is the layout data object associated with
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* <code>GridLayout</code>. To set a <code>GridData</code> object into a
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* <code>Figure</code>, you use the <code>setConstraint()</code> method of
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* <code>GridLayout</code> to map the <code>Figure</code> to its layout
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* <code>GridData</code>.
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* <p>
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* There are two ways to create a <code>GridData</code> object with certain
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* fields set. The first is to set the fields directly, like this:
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*
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* <pre>
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* GridData gridData = new GridData();
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* gridData.horizontalAlignment = GridData.FILL;
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* gridData.grabExcessHorizontalSpace = true;
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*
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* // associate the figure to the GridData object
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* myGridlayout.setConstraint(myFigure, gridData);
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* </pre>
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*
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* The second is to take advantage of convenience style bits defined by
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* <code>GridData</code>:
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*
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* <pre>
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* GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL
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* | GridData.GRAB_HORIZONTAL);
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* </pre>
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*
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* </p>
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* <p>
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* NOTE: Do not reuse <code>GridData</code> objects. Every child in the parent
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* <code>Figure</code> that is managed by the <code>GridLayout</code> must have
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* a unique <code>GridData</code> object. If the layout data for a Grid member
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* in a <code>GridLayout</code> is null at layout time, a unique
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* <code>GridData</code> object is created for it.
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* </p>
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*
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* @see GridLayout
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*/
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public final class GridData {
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/**
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* verticalAlignment specifies how figures will be positioned vertically
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* within a cell.
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*
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* The default value is CENTER.
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*
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* Possible values are:
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*
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* SWT.BEGINNING (or SWT.TOP): Position the figure at the top of the cell
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* SWT.CENTER: Position the figure in the vertical center of the cell
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* SWT.END (or SWT.BOTTOM): Position the figure at the bottom of the cell
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* SWT.FILL: Resize the figure to fill the cell vertically
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*/
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public int verticalAlignment = CENTER;
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/**
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* horizontalAlignment specifies how figures will be positioned horizontally
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* within a cell.
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*
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* The default value is BEGINNING.
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*
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* Possible values are:
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*
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* SWT.BEGINNING (or SWT.LEFT): Position the figure at the left of the cell
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* SWT.CENTER: Position the figure in the horizontal center of the cell
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* SWT.END (or SWT.RIGHT): Position the figure at the right of the cell
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* SWT.FILL: Resize the figure to fill the cell horizontally
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*/
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public int horizontalAlignment = BEGINNING;
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/**
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* widthHint specifies a minimum width for the column. A value of
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* SWT.DEFAULT indicates that no minimum width is specified.
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*
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* The default value is SWT.DEFAULT.
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*/
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public int widthHint = SWT.DEFAULT;
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/**
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* heightHint specifies a minimum height for the row. A value of SWT.DEFAULT
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* indicates that no minimum height is specified.
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*
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* The default value is SWT.DEFAULT.
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*/
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public int heightHint = SWT.DEFAULT;
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/**
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* horizontalIndent specifies the number of pixels of indentation that will
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* be placed along the left side of the cell.
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*
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* The default value is 0.
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*/
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public int horizontalIndent = 0;
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/**
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* horizontalSpan specifies the number of column cells that the figure will
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* take up.
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*
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* The default value is 1.
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*/
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public int horizontalSpan = 1;
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/**
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* verticalSpan specifies the number of row cells that the figure will take
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* up.
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*
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* The default value is 1.
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*/
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public int verticalSpan = 1;
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/**
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* grabExcessHorizontalSpace specifies whether the cell will be made wide
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* enough to fit the remaining horizontal space.
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*
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* The default value is false.
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*/
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public boolean grabExcessHorizontalSpace = false;
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/**
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* grabExcessVerticalSpace specifies whether the cell will be made tall
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* enough to fit the remaining vertical space.
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*
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* The default value is false.
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*/
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public boolean grabExcessVerticalSpace = false;
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/**
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* Value for horizontalAlignment or verticalAlignment. Position the figure
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* at the top or left of the cell. Not recommended. Use SWT.BEGINNING,
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* SWT.TOP or SWT.LEFT instead.
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*/
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public static final int BEGINNING = SWT.BEGINNING;
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/**
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* Value for horizontalAlignment or verticalAlignment. Position the figure
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* in the vertical or horizontal center of the cell Not recommended. Use
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* SWT.CENTER instead.
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*/
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public static final int CENTER = 2;
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/**
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* Value for horizontalAlignment or verticalAlignment. Position the figure
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* at the bottom or right of the cell Not recommended. Use SWT.END,
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* SWT.BOTTOM or SWT.RIGHT instead.
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*/
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public static final int END = 3;
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/**
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* Value for horizontalAlignment or verticalAlignment. Resize the figure to
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* fill the cell horizontally or vertically. Not recommended. Use SWT.FILL
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* instead.
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*/
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public static final int FILL = SWT.FILL;
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/**
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* Style bit for <code>new GridData(int)</code>. Position the figure at the
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* top of the cell. Not recommended. Use
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* <code>new GridData(int, SWT.BEGINNING, boolean, boolean)</code> instead.
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*/
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public static final int VERTICAL_ALIGN_BEGINNING = 1 << 1;
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/**
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* Style bit for <code>new GridData(int)</code> to position the figure in
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* the vertical center of the cell. Not recommended. Use
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* <code>new GridData(int, SWT.CENTER, boolean, boolean)</code> instead.
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*/
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public static final int VERTICAL_ALIGN_CENTER = 1 << 2;
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/**
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* Style bit for <code>new GridData(int)</code> to position the figure at
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* the bottom of the cell. Not recommended. Use
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* <code>new GridData(int, SWT.END, boolean, boolean)</code> instead.
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*/
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public static final int VERTICAL_ALIGN_END = 1 << 3;
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/**
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* Style bit for <code>new GridData(int)</code> to resize the figure to fill
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* the cell vertically. Not recommended. Use
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* <code>new GridData(int, SWT.FILL, boolean, boolean)</code> instead
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*/
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public static final int VERTICAL_ALIGN_FILL = 1 << 4;
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/**
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* Style bit for <code>new GridData(int)</code> to position the figure at
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* the left of the cell. Not recommended. Use
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* <code>new GridData(SWT.BEGINNING, int, boolean, boolean)</code> instead.
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*/
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public static final int HORIZONTAL_ALIGN_BEGINNING = 1 << 5;
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/**
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* Style bit for <code>new GridData(int)</code> to position the figure in
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* the horizontal center of the cell. Not recommended. Use
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* <code>new GridData(SWT.CENTER, int, boolean, boolean)</code> instead.
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*/
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public static final int HORIZONTAL_ALIGN_CENTER = 1 << 6;
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/**
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* Style bit for <code>new GridData(int)</code> to position the figure at
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* the right of the cell. Not recommended. Use
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* <code>new GridData(SWT.END, int, boolean, boolean)</code> instead.
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*/
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public static final int HORIZONTAL_ALIGN_END = 1 << 7;
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/**
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* Style bit for <code>new GridData(int)</code> to resize the figure to fill
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* the cell horizontally. Not recommended. Use
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* <code>new GridData(SWT.FILL, int, boolean, boolean)</code> instead.
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*/
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public static final int HORIZONTAL_ALIGN_FILL = 1 << 8;
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/**
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* Style bit for <code>new GridData(int)</code> to resize the figure to fit
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* the remaining horizontal space. Not recommended. Use
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* <code>new GridData(int, int, true, boolean)</code> instead.
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*/
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public static final int GRAB_HORIZONTAL = 1 << 9;
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/**
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* Style bit for <code>new GridData(int)</code> to resize the figure to fit
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* the remaining vertical space. Not recommended. Use
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* <code>new GridData(int, int, boolean, true)</code> instead.
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*/
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public static final int GRAB_VERTICAL = 1 << 10;
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/**
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* Style bit for <code>new GridData(int)</code> to resize the figure to fill
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* the cell vertically and to fit the remaining vertical space.
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* FILL_VERTICAL = VERTICAL_ALIGN_FILL | GRAB_VERTICAL Not recommended. Use
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* <code>new GridData(int, SWT.FILL, boolean, true)</code> instead.
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*/
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public static final int FILL_VERTICAL = VERTICAL_ALIGN_FILL | GRAB_VERTICAL;
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/**
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* Style bit for <code>new GridData(int)</code> to resize the figure to fill
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* the cell horizontally and to fit the remaining horizontal space.
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* FILL_HORIZONTAL = HORIZONTAL_ALIGN_FILL | GRAB_HORIZONTAL Not
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* recommended. Use <code>new GridData(SWT.FILL, int, true, boolean)</code>
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* instead.
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*/
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public static final int FILL_HORIZONTAL = HORIZONTAL_ALIGN_FILL
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| GRAB_HORIZONTAL;
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/**
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* Style bit for <code>new GridData(int)</code> to resize the figure to fill
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* the cell horizontally and vertically and to fit the remaining horizontal
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* and vertical space. FILL_BOTH = FILL_VERTICAL | FILL_HORIZONTAL Not
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* recommended. Use
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* <code>new GridData(SWT.FILL, SWT.FILL, true, true)</code> instead.
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*/
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public static final int FILL_BOTH = FILL_VERTICAL | FILL_HORIZONTAL;
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int cacheWidth = -1, cacheHeight = -1;
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int[][] cache = new int[2][4];
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int cacheIndex = -1;
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/**
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* Constructs a new instance of GridData using default values.
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*/
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public GridData() {
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super();
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}
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/**
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* Constructs a new instance based on the GridData style. This constructor
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* is not recommended.
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*
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* @param style
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* the GridData style
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*/
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public GridData(int style) {
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super();
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if ((style & VERTICAL_ALIGN_BEGINNING) != 0)
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verticalAlignment = BEGINNING;
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if ((style & VERTICAL_ALIGN_CENTER) != 0)
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verticalAlignment = CENTER;
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if ((style & VERTICAL_ALIGN_FILL) != 0)
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verticalAlignment = FILL;
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if ((style & VERTICAL_ALIGN_END) != 0)
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verticalAlignment = END;
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if ((style & HORIZONTAL_ALIGN_BEGINNING) != 0)
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horizontalAlignment = BEGINNING;
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if ((style & HORIZONTAL_ALIGN_CENTER) != 0)
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horizontalAlignment = CENTER;
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if ((style & HORIZONTAL_ALIGN_FILL) != 0)
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horizontalAlignment = FILL;
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if ((style & HORIZONTAL_ALIGN_END) != 0)
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horizontalAlignment = END;
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grabExcessHorizontalSpace = (style & GRAB_HORIZONTAL) != 0;
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grabExcessVerticalSpace = (style & GRAB_VERTICAL) != 0;
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}
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/**
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* Constructs a new instance of GridData according to the parameters.
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*
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* @param horizontalAlignment
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* how figure will be positioned horizontally within a cell
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* @param verticalAlignment
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* how figure will be positioned vertically within a cell
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* @param grabExcessHorizontalSpace
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* whether cell will be made wide enough to fit the remaining
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* horizontal space
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* @param grabExcessVerticalSpace
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* whether cell will be made high enough to fit the remaining
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* vertical space
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*
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*/
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public GridData(int horizontalAlignment, int verticalAlignment,
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boolean grabExcessHorizontalSpace, boolean grabExcessVerticalSpace) {
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this(horizontalAlignment, verticalAlignment, grabExcessHorizontalSpace,
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grabExcessVerticalSpace, 1, 1);
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}
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/**
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* Constructs a new instance of GridData according to the parameters.
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*
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* @param horizontalAlignment
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* how figure will be positioned horizontally within a cell
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* @param verticalAlignment
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* how figure will be positioned vertically within a cell
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* @param grabExcessHorizontalSpace
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* whether cell will be made wide enough to fit the remaining
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* horizontal space
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* @param grabExcessVerticalSpace
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* whether cell will be made high enough to fit the remaining
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* vertical space
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* @param horizontalSpan
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* the number of column cells that the figure will take up
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* @param verticalSpan
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* the number of row cells that the figure will take up
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*
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*/
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public GridData(int horizontalAlignment, int verticalAlignment,
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boolean grabExcessHorizontalSpace, boolean grabExcessVerticalSpace,
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int horizontalSpan, int verticalSpan) {
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super();
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this.horizontalAlignment = horizontalAlignment;
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this.verticalAlignment = verticalAlignment;
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this.grabExcessHorizontalSpace = grabExcessHorizontalSpace;
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this.grabExcessVerticalSpace = grabExcessVerticalSpace;
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this.horizontalSpan = horizontalSpan;
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this.verticalSpan = verticalSpan;
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}
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/**
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* Constructs a new instance of GridData according to the parameters. A
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* value of SWT.DEFAULT indicates that no minimum width or no minumum height
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* is specified.
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*
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365
|
* @param width
|
|
366
|
* a minimum width for the column
|
|
367
|
* @param height
|
|
368
|
* a minimum height for the row
|
|
369
|
*
|
|
370
|
*/
|
|
371
|
public GridData(int width, int height) {
|
|
372
|
super();
|
|
373
|
this.widthHint = width;
|
|
374
|
this.heightHint = height;
|
|
375
|
}
|
|
376
|
|
|
377
|
Dimension computeSize(IFigure figure, boolean flushCache) {
|
|
378
|
if (cacheWidth != -1 && cacheHeight != -1) {
|
|
379
|
return new Dimension(cacheWidth, cacheHeight);
|
|
380
|
}
|
|
381
|
for (int i = 0; i < cacheIndex + 1; i++) {
|
|
382
|
if (cache[i][0] == widthHint && cache[i][1] == heightHint) {
|
|
383
|
cacheWidth = cache[i][2];
|
|
384
|
cacheHeight = cache[i][3];
|
|
385
|
return new Dimension(cacheWidth, cacheHeight);
|
|
386
|
}
|
|
387
|
}
|
|
388
|
|
|
389
|
Dimension size = figure.getPreferredSize(widthHint, heightHint)
|
|
390
|
.getCopy();
|
|
391
|
if (widthHint != -1)
|
|
392
|
size.width = widthHint;
|
|
393
|
if (heightHint != -1)
|
|
394
|
size.height = heightHint;
|
|
395
|
|
|
396
|
if (cacheIndex < cache.length - 1)
|
|
397
|
cacheIndex++;
|
|
398
|
cache[cacheIndex][0] = widthHint;
|
|
399
|
cache[cacheIndex][1] = heightHint;
|
|
400
|
cacheWidth = cache[cacheIndex][2] = size.width;
|
|
401
|
cacheHeight = cache[cacheIndex][3] = size.height;
|
|
402
|
return size;
|
|
403
|
}
|
|
404
|
|
|
405
|
void flushCache() {
|
|
406
|
cacheWidth = cacheHeight = -1;
|
|
407
|
cacheIndex = -1;
|
|
408
|
}
|
|
409
|
|
|
410
|
String getName() {
|
|
411
|
String string = getClass().getName();
|
|
412
|
int index = string.lastIndexOf('.');
|
|
413
|
if (index == -1)
|
|
414
|
return string;
|
|
415
|
return string.substring(index + 1, string.length());
|
|
416
|
}
|
|
417
|
|
|
418
|
public String toString() {
|
|
419
|
|
|
420
|
String hAlign = ""; //$NON-NLS-1$
|
|
421
|
switch (horizontalAlignment) {
|
|
422
|
case SWT.FILL:
|
|
423
|
hAlign = "SWT.FILL"; //$NON-NLS-1$
|
|
424
|
break;
|
|
425
|
case SWT.BEGINNING:
|
|
426
|
hAlign = "SWT.BEGINNING"; //$NON-NLS-1$
|
|
427
|
break;
|
|
428
|
case SWT.LEFT:
|
|
429
|
hAlign = "SWT.LEFT"; //$NON-NLS-1$
|
|
430
|
break;
|
|
431
|
case SWT.END:
|
|
432
|
hAlign = "SWT.END"; //$NON-NLS-1$
|
|
433
|
break;
|
|
434
|
case END:
|
|
435
|
hAlign = "GridData.END"; //$NON-NLS-1$
|
|
436
|
break;
|
|
437
|
case SWT.RIGHT:
|
|
438
|
hAlign = "SWT.RIGHT"; //$NON-NLS-1$
|
|
439
|
break;
|
|
440
|
case SWT.CENTER:
|
|
441
|
hAlign = "SWT.CENTER"; //$NON-NLS-1$
|
|
442
|
break;
|
|
443
|
case CENTER:
|
|
444
|
hAlign = "GridData.CENTER"; //$NON-NLS-1$
|
|
445
|
break;
|
|
446
|
default:
|
|
447
|
hAlign = "Undefined " + horizontalAlignment; //$NON-NLS-1$
|
|
448
|
break;
|
|
449
|
}
|
|
450
|
String vAlign = ""; //$NON-NLS-1$
|
|
451
|
switch (verticalAlignment) {
|
|
452
|
case SWT.FILL:
|
|
453
|
vAlign = "SWT.FILL"; //$NON-NLS-1$
|
|
454
|
break;
|
|
455
|
case SWT.BEGINNING:
|
|
456
|
vAlign = "SWT.BEGINNING"; //$NON-NLS-1$
|
|
457
|
break;
|
|
458
|
case SWT.TOP:
|
|
459
|
vAlign = "SWT.TOP"; //$NON-NLS-1$
|
|
460
|
break;
|
|
461
|
case SWT.END:
|
|
462
|
vAlign = "SWT.END"; //$NON-NLS-1$
|
|
463
|
break;
|
|
464
|
case END:
|
|
465
|
vAlign = "GridData.END"; //$NON-NLS-1$
|
|
466
|
break;
|
|
467
|
case SWT.BOTTOM:
|
|
468
|
vAlign = "SWT.BOTTOM"; //$NON-NLS-1$
|
|
469
|
break;
|
|
470
|
case SWT.CENTER:
|
|
471
|
vAlign = "SWT.CENTER"; //$NON-NLS-1$
|
|
472
|
break;
|
|
473
|
case CENTER:
|
|
474
|
vAlign = "GridData.CENTER"; //$NON-NLS-1$
|
|
475
|
break;
|
|
476
|
default:
|
|
477
|
vAlign = "Undefined " + verticalAlignment; //$NON-NLS-1$
|
|
478
|
break;
|
|
479
|
}
|
|
480
|
String string = getName() + " {"; //$NON-NLS-1$
|
|
481
|
string += "horizontalAlignment=" + hAlign + " "; //$NON-NLS-1$ //$NON-NLS-2$
|
|
482
|
if (horizontalIndent != 0)
|
|
483
|
string += "horizontalIndent=" + horizontalIndent + " "; //$NON-NLS-1$ //$NON-NLS-2$
|
|
484
|
if (horizontalSpan != 1)
|
|
485
|
string += "horizontalSpan=" + horizontalSpan + " "; //$NON-NLS-1$//$NON-NLS-2$
|
|
486
|
if (grabExcessHorizontalSpace)
|
|
487
|
string += "grabExcessHorizontalSpace=" + grabExcessHorizontalSpace //$NON-NLS-1$
|
|
488
|
+ " "; //$NON-NLS-1$
|
|
489
|
if (widthHint != SWT.DEFAULT)
|
|
490
|
string += "widthHint=" + widthHint + " "; //$NON-NLS-1$ //$NON-NLS-2$
|
|
491
|
string += "verticalAlignment=" + vAlign + " "; //$NON-NLS-1$ //$NON-NLS-2$
|
|
492
|
if (verticalSpan != 1)
|
|
493
|
string += "verticalSpan=" + verticalSpan + " "; //$NON-NLS-1$ //$NON-NLS-2$
|
|
494
|
if (grabExcessVerticalSpace)
|
|
495
|
string += "grabExcessVerticalSpace=" + grabExcessVerticalSpace //$NON-NLS-1$
|
|
496
|
+ " "; //$NON-NLS-1$
|
|
497
|
if (heightHint != SWT.DEFAULT)
|
|
498
|
string += "heightHint=" + heightHint + " "; //$NON-NLS-1$ //$NON-NLS-2$
|
|
499
|
string = string.trim();
|
|
500
|
string += "}"; //$NON-NLS-1$
|
|
501
|
return string;
|
|
502
|
|
|
503
|
}
|
|
504
|
|
|
505
|
}
|