| /* PasswordView.java -- |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.swing.text; |
| |
| import java.awt.Color; |
| import java.awt.Graphics; |
| |
| import javax.swing.JPasswordField; |
| |
| public class PasswordView extends FieldView |
| { |
| /** |
| * Buffer for putting the echo char into it and |
| * then using it to draw it into the view. |
| */ |
| private char[] oneCharBuffer = new char[1]; |
| |
| public PasswordView(Element elem) |
| { |
| super(elem); |
| } |
| |
| /** |
| * Draws one echo character at a given position. |
| * |
| * @param g the <code>Graphics</code> object to draw to |
| * @param x the x-position |
| * @param y the y-position |
| * @param ch the echo character |
| * |
| * @return the next x position right of the drawn character |
| */ |
| protected int drawEchoCharacter(Graphics g, int x, int y, char ch) |
| { |
| // Update font metrics. |
| updateMetrics(); |
| |
| // Draw character. |
| oneCharBuffer[0] = ch; |
| g.drawChars(oneCharBuffer, 0, 1, x, y); |
| |
| // Return new x position right of drawn character. |
| return x + metrics.charWidth(ch); |
| } |
| |
| private char getEchoChar() |
| { |
| char ch = ((JPasswordField) getContainer()).getEchoChar(); |
| |
| if (ch == 0) |
| ch = '*'; |
| |
| return ch; |
| } |
| |
| /** |
| * Draws selected text at a given position. |
| * |
| * @param g the <code>Graphics</code> object to draw to |
| * @param x the x-position |
| * @param y the y-position |
| * @param p0 the position of the first character to draw |
| * @param p1 the position of the first character not to draw |
| * |
| * @return the next x position right of the drawn character |
| */ |
| protected int drawSelectedText(Graphics g, int x, int y, int p0, int p1) |
| throws BadLocationException |
| { |
| // FIXME: Throw BadLocationException somehow. |
| |
| // Update font metrics. |
| updateMetrics(); |
| |
| // Get echo character. |
| char ch = getEchoChar(); |
| |
| // Set color for selected text. |
| g.setColor(selectedColor); |
| g.setColor(Color.BLACK); |
| |
| // Initialize buffer for faster drawing of all characters. |
| int len = p1 - p0; |
| char[] buffer = new char[len]; |
| for (int index = 0; index < len; ++index) |
| buffer[index] = ch; |
| |
| // Draw echo charaters. |
| g.drawChars(buffer, 0, len, x, y); |
| |
| // Return new x position right of all drawn characters. |
| return x + len * metrics.charWidth(ch); |
| } |
| |
| /** |
| * Draws unselected text at a given position. |
| * |
| * @param g the <code>Graphics</code> object to draw to |
| * @param x the x-position |
| * @param y the y-position |
| * @param p0 the position of the first character to draw |
| * @param p1 the position of the first character not to draw |
| * |
| * @return the next x position right of the drawn character |
| */ |
| protected int drawUnselectedText(Graphics g, int x, int y, int p0, int p1) |
| throws BadLocationException |
| { |
| // FIXME: Throw BadLocationException somehow. |
| |
| // Update font metrics. |
| updateMetrics(); |
| |
| // Get echo character. |
| char ch = getEchoChar(); |
| |
| // Set color for unselected text. |
| g.setColor(unselectedColor); |
| g.setColor(Color.BLACK); |
| |
| // Initialize buffer for faster drawing of all characters. |
| int len = p1 - p0; |
| char[] buffer = new char[len]; |
| for (int index = 0; index < len; ++index) |
| buffer[index] = ch; |
| |
| // Draw echo charaters. |
| g.drawChars(buffer, 0, len, x, y); |
| |
| // Return new x position right of all drawn characters. |
| return x + len * metrics.charWidth(ch); |
| } |
| } |
| |