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- /* ========================================================================
- * JCommon : a free general purpose class library for the Java(tm) platform
- * ========================================================================
- *
- * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
- *
- * Project Info: http://www.jfree.org/jcommon/index.html
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- * License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- * USA.
- *
- * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
- * in the United States and other countries.]
- *
- * -------------
- * TextLine.java
- * -------------
- * (C) Copyright 2003-2013, by Object Refinery Limited and Contributors.
- *
- * Original Author: David Gilbert (for Object Refinery Limited);
- * Contributor(s): -;
- *
- * $Id: TextLine.java,v 1.13 2007/11/02 17:50:35 taqua Exp $
- *
- * Changes
- * -------
- * 07-Nov-2003 : Version 1 (DG);
- * 22-Dec-2003 : Added workaround for Java bug 4245442 (DG);
- * 29-Jan-2004 : Added new constructor (DG);
- * 22-Mar-2004 : Added equals() method and implemented Serializable (DG);
- * 01-Apr-2004 : Changed java.awt.geom.Dimension2D to org.jfree.ui.Size2D
- * because of JDK bug 4976448 which persists on JDK 1.3.1 (DG);
- * 03-Sep-2004 : Added a method to remove a fragment (DG);
- * 08-Jul-2005 : Fixed bug in calculateBaselineOffset() (DG);
- * 01-Sep-2013 : Updated draw() method to take into account the textAnchor (DG);
- *
- */
- package org.jfree.text;
- import java.awt.Font;
- import java.awt.Graphics2D;
- import java.awt.Paint;
- import java.io.Serializable;
- import java.util.Iterator;
- import java.util.List;
- import org.jfree.ui.Size2D;
- import org.jfree.ui.TextAnchor;
- /**
- * A sequence of {@link TextFragment} objects that together form a line of
- * text. A sequence of text lines is managed by the {@link TextBlock} class.
- *
- * @author David Gilbert
- */
- public class TextLine implements Serializable {
- /** For serialization. */
- private static final long serialVersionUID = 7100085690160465444L;
-
- /** Storage for the text fragments that make up the line. */
- private List fragments;
- /**
- * Creates a new empty line.
- */
- public TextLine() {
- this.fragments = new java.util.ArrayList();
- }
-
- /**
- * Creates a new text line using the default font.
- *
- * @param text the text (<code>null</code> not permitted).
- */
- public TextLine(final String text) {
- this(text, TextFragment.DEFAULT_FONT);
- }
-
- /**
- * Creates a new text line.
- *
- * @param text the text (<code>null</code> not permitted).
- * @param font the text font (<code>null</code> not permitted).
- */
- public TextLine(final String text, final Font font) {
- this.fragments = new java.util.ArrayList();
- final TextFragment fragment = new TextFragment(text, font);
- this.fragments.add(fragment);
- }
-
- /**
- * Creates a new text line.
- *
- * @param text the text (<code>null</code> not permitted).
- * @param font the text font (<code>null</code> not permitted).
- * @param paint the text color (<code>null</code> not permitted).
- */
- public TextLine(final String text, final Font font, final Paint paint) {
- if (text == null) {
- throw new IllegalArgumentException("Null 'text' argument.");
- }
- if (font == null) {
- throw new IllegalArgumentException("Null 'font' argument.");
- }
- if (paint == null) {
- throw new IllegalArgumentException("Null 'paint' argument.");
- }
- this.fragments = new java.util.ArrayList();
- final TextFragment fragment = new TextFragment(text, font, paint);
- this.fragments.add(fragment);
- }
-
- /**
- * Adds a text fragment to the text line.
- *
- * @param fragment the text fragment (<code>null</code> not permitted).
- */
- public void addFragment(final TextFragment fragment) {
- this.fragments.add(fragment);
- }
-
- /**
- * Removes a fragment from the line.
- *
- * @param fragment the fragment to remove.
- */
- public void removeFragment(final TextFragment fragment) {
- this.fragments.remove(fragment);
- }
-
- /**
- * Draws the text line.
- *
- * @param g2 the graphics device.
- * @param anchorX the x-coordinate for the anchor point.
- * @param anchorY the y-coordinate for the anchor point.
- * @param anchor the point on the text line that is aligned to the anchor
- * point.
- * @param rotateX the x-coordinate for the rotation point.
- * @param rotateY the y-coordinate for the rotation point.
- * @param angle the rotation angle (in radians).
- */
- public void draw(Graphics2D g2, float anchorX, float anchorY,
- TextAnchor anchor, float rotateX, float rotateY, double angle) {
-
- Size2D dim = calculateDimensions(g2);
- float xAdj = 0.0f;
- if (anchor.isHorizontalCenter()) {
- xAdj = (float) -dim.getWidth() / 2.0f;
- }
- else if (anchor.isRight()) {
- xAdj = (float) -dim.getWidth();
- }
- float x = anchorX + xAdj;
- final float yOffset = calculateBaselineOffset(g2, anchor);
- final Iterator iterator = this.fragments.iterator();
- while (iterator.hasNext()) {
- final TextFragment fragment = (TextFragment) iterator.next();
- final Size2D d = fragment.calculateDimensions(g2);
- fragment.draw(g2, x, anchorY + yOffset, TextAnchor.BASELINE_LEFT,
- rotateX, rotateY, angle);
- x = x + (float) d.getWidth();
- }
-
- }
-
- /**
- * Calculates the width and height of the text line.
- *
- * @param g2 the graphics device.
- *
- * @return The width and height.
- */
- public Size2D calculateDimensions(final Graphics2D g2) {
- double width = 0.0;
- double height = 0.0;
- final Iterator iterator = this.fragments.iterator();
- while (iterator.hasNext()) {
- final TextFragment fragment = (TextFragment) iterator.next();
- final Size2D dimension = fragment.calculateDimensions(g2);
- width = width + dimension.getWidth();
- height = Math.max(height, dimension.getHeight());
- }
- return new Size2D(width, height);
- }
-
- /**
- * Returns the first text fragment in the line.
- *
- * @return The first text fragment in the line.
- */
- public TextFragment getFirstTextFragment() {
- TextFragment result = null;
- if (this.fragments.size() > 0) {
- result = (TextFragment) this.fragments.get(0);
- }
- return result;
- }
-
- /**
- * Returns the last text fragment in the line.
- *
- * @return The last text fragment in the line.
- */
- public TextFragment getLastTextFragment() {
- TextFragment result = null;
- if (this.fragments.size() > 0) {
- result = (TextFragment) this.fragments.get(this.fragments.size()
- - 1);
- }
- return result;
- }
-
- /**
- * Calculate the offsets required to translate from the specified anchor
- * position to the left baseline position.
- *
- * @param g2 the graphics device.
- * @param anchor the anchor position.
- *
- * @return The offsets.
- */
- private float calculateBaselineOffset(final Graphics2D g2,
- final TextAnchor anchor) {
- float result = 0.0f;
- Iterator iterator = this.fragments.iterator();
- while (iterator.hasNext()) {
- TextFragment fragment = (TextFragment) iterator.next();
- result = Math.max(result,
- fragment.calculateBaselineOffset(g2, anchor));
- }
- return result;
- }
-
- /**
- * Tests this object for equality with an arbitrary object.
- *
- * @param obj the object to test against (<code>null</code> permitted).
- *
- * @return A boolean.
- */
- public boolean equals(final Object obj) {
- if (obj == null) {
- return false;
- }
- if (obj == this) {
- return true;
- }
- if (obj instanceof TextLine) {
- final TextLine line = (TextLine) obj;
- return this.fragments.equals(line.fragments);
- }
- return false;
- }
- /**
- * Returns a hash code for this object.
- *
- * @return A hash code.
- */
- public int hashCode() {
- return (this.fragments != null ? this.fragments.hashCode() : 0);
- }
- }
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