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im-sdk  12.3.91
PreeditPane.java
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00001 /*
00002 Copyright 1990-2001 Sun Microsystems, Inc. All Rights Reserved.
00003 
00004 Permission is hereby granted, free of charge, to any person obtaining a
00005 copy of this software and associated documentation files (the
00006 "Software"), to deal in the Software without restriction, including
00007 without limitation the rights to use, copy, modify, merge, publish,
00008 distribute, sublicense, and/or sell copies of the Software, and to
00009 permit persons to whom the Software is furnished to do so, subject to
00010 the following conditions: The above copyright notice and this
00011 permission notice shall be included in all copies or substantial
00012 portions of the Software.
00013 
00014 
00015 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00016 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00017 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
00018 IN NO EVENT SHALL THE OPEN GROUP OR SUN MICROSYSTEMS, INC. BE LIABLE
00019 FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
00020 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH
00021 THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE EVEN IF
00022 ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES.
00023 
00024 
00025 Except as contained in this notice, the names of The Open Group and/or
00026 Sun Microsystems, Inc. shall not be used in advertising or otherwise to
00027 promote the sale, use or other dealings in this Software without prior
00028 written authorization from The Open Group and/or Sun Microsystems,
00029 Inc., as applicable.
00030 
00031 
00032 X Window System is a trademark of The Open Group
00033 
00034 OSF/1, OSF/Motif and Motif are registered trademarks, and OSF, the OSF
00035 logo, LBX, X Window System, and Xinerama are trademarks of the Open
00036 Group. All other trademarks and registered trademarks mentioned herein
00037 are the property of their respective owners. No right, title or
00038 interest in or to any trademark, service mark, logo or trade name of
00039 Sun Microsystems, Inc. or its licensors is granted.
00040 
00041 */
00042 
00043 
00044 package sun.awt.im.iiimp;
00045 
00046 import java.awt.*;
00047 import java.text.*;
00048 import com.sun.iiim.*;
00049 
00050 class PreeditPane extends Canvas {
00051     private String composedString;
00052     private int caret;
00053     private final static int TEXT_ORIGIN_X = 5;
00054     private final static int TEXT_ORIGIN_Y = 15;
00055     
00056     private int width, height;
00057     FontMetrics metrics;        
00058     
00062     public PreeditPane() {
00063     }
00064     
00065     public void paint(Graphics g) {
00066         super.paint(g);
00067         
00068         if(composedString.length() > 0) {
00069             g.setColor(getForeground());
00070             g.drawString(composedString, TEXT_ORIGIN_X, TEXT_ORIGIN_Y);
00071         }
00072         Rectangle rect = getCaretRectangle();
00073         
00074         g.fillRect(rect.x, rect.y, 1, rect.height);
00075     }
00076 
00077     private Rectangle getCaretRectangle() {
00078         int width = 0;
00079         
00080         if (caret > 0) {
00081             char chars[] = new char[caret];
00082             // can't call getChars() if composedText.length() == 0
00083             composedString.getChars(0, caret, chars, 0);
00084             width = metrics.charsWidth(chars, 0, caret);
00085         }
00086         return new Rectangle(TEXT_ORIGIN_X + width,
00087                              TEXT_ORIGIN_Y - metrics.getAscent(),
00088                              0, metrics.getAscent() + metrics.getDescent());    
00089     }
00090     
00091     void handleEvent(IIIMPreeditEvent e) {
00092         if(metrics == null) metrics = getGraphics().getFontMetrics();
00093 
00094         composedString = new String();
00095         AttributedCharacterIterator str = e.getIterator();
00096         for(char c = str.first(); c != CharacterIterator.DONE; 
00097             c = str.next()) {
00098             composedString += c;
00099         }
00100 
00101         width = metrics.stringWidth(composedString);
00102         height = metrics.getHeight();
00103         caret = e.getCaret();
00104         
00105         repaint();
00106     }
00107     
00108     int width() {
00109         return width;
00110     }
00111     
00112     int height() {
00113         return height;
00114     }
00115 }