📄 multilinestring.java
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/*Violet - A program for editing UML diagrams.Copyright (C) 2002 Cay S. Horstmann (http://horstmann.com)This program is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 2 of the License, or(at your option) any later version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA*/package com.horstmann.violet.framework;import java.awt.Dimension;import java.awt.Graphics2D;import java.awt.geom.Rectangle2D;import java.io.Serializable;import java.util.Arrays;import java.util.List;import java.util.StringTokenizer;import javax.swing.JLabel;/** A string that can extend over multiple lines.*/public class MultiLineString implements Cloneable, Serializable{ /** Constructs an empty, centered, normal size multiline string that is not underlined. */ public MultiLineString() { text = ""; justification = CENTER; size = NORMAL; underlined = false; } /** Sets the value of the text property. @param newValue the text of the multiline string */ public void setText(String newValue) { text = newValue; } /** Gets the value of the text property. @return the text of the multiline string */ public String getText() { return text; } /** Sets the value of the justification property. @param newValue the justification, one of LEFT, CENTER, RIGHT */ public void setJustification(int newValue) { justification = newValue; } /** Gets the value of the justification property. @return the justification, one of LEFT, CENTER, RIGHT */ public int getJustification() { return justification; } /** Gets the value of the underlined property. @return true if the text is underlined */ public boolean isUnderlined() { return underlined; } /** Sets the value of the underlined property. @param newValue true to underline the text */ public void setUnderlined(boolean newValue) { underlined = newValue; } /** Sets the value of the size property. @param newValue the size, one of SMALL, NORMAL, LARGE */ public void setSize(int newValue) { size = newValue; } /** Gets the value of the size property. @return the size, one of SMALL, NORMAL, LARGE */ public int getSize() { return size; } public String toString() { return text.replace('\n', '|'); } private void setLabelText() { StringBuffer prefix = new StringBuffer(); StringBuffer suffix = new StringBuffer(); StringBuffer htmlText = new StringBuffer(); prefix.append(" "); suffix.insert(0, " "); if (underlined) { prefix.append("<u>"); suffix.insert(0, "</u>"); } if (size == LARGE) { prefix.append("<font size=\"+1\">"); suffix.insert(0, "</font>"); } if (size == SMALL) { prefix.append("<font size=\"-1\">"); suffix.insert(0, "</font>"); } htmlText.append("<html>"); StringTokenizer tokenizer = new StringTokenizer(text, "\n"); boolean first = true; while (tokenizer.hasMoreTokens()) { if (first) first = false; else htmlText.append("<br>"); htmlText.append(prefix); htmlText.append(tokenizer.nextToken()); htmlText.append(suffix); } htmlText.append("</html>"); // replace any < that are not followed by {u, i, b, tt, font, br} with < List dontReplace = Arrays.asList(new String[] { "u", "i", "b", "tt", "font", "br" }); int ltpos = 0; while (ltpos != -1) { ltpos = htmlText.indexOf("<", ltpos + 1); if (ltpos != -1 && !(ltpos + 1 < htmlText.length() && htmlText.charAt(ltpos + 1) == '/')) { int end = ltpos + 1; while (end < htmlText.length() && Character.isLetter(htmlText.charAt(end))) end++; if (!dontReplace.contains(htmlText.substring(ltpos + 1, end))) htmlText.replace(ltpos, ltpos+1, "<"); } } label.setText(htmlText.toString()); if (justification == LEFT) label.setHorizontalAlignment(JLabel.LEFT); else if (justification == CENTER) label.setHorizontalAlignment(JLabel.CENTER); else if (justification == RIGHT) label.setHorizontalAlignment(JLabel.RIGHT); } /** Gets the bounding rectangle for this multiline string. @param g2 the graphics context @return the bounding rectangle (with top left corner (0,0)) */ public Rectangle2D getBounds(Graphics2D g2) { if (text.length() == 0) return new Rectangle2D.Double(); setLabelText(); Dimension dim = label.getPreferredSize(); return new Rectangle2D.Double(0, 0, dim.getWidth(), dim.getHeight()); } /** Draws this multiline string inside a given rectangle @param g2 the graphics context @param r the rectangle into which to place this multiline string */ public void draw(Graphics2D g2, Rectangle2D r) { setLabelText(); label.setFont(g2.getFont()); label.setBounds(0, 0, (int) r.getWidth(), (int) r.getHeight()); g2.translate(r.getX(), r.getY()); label.paint(g2); g2.translate(-r.getX(), -r.getY()); } public Object clone() { try { return super.clone(); } catch (CloneNotSupportedException exception) { return null; } } public static final int LEFT = 0; public static final int CENTER = 1; public static final int RIGHT = 2; public static final int LARGE = 3; public static final int NORMAL = 4; public static final int SMALL = 5; private static final int GAP = 3; private String text; private int justification; private int size; private boolean underlined; private static JLabel label = new JLabel();}⌨️ 快捷键说明
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