1 /* QtFontMetrics.java -- 2 Copyright (C) 2005 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 package gnu.java.awt.peer.qt; 39 40 import java.awt.Font; 41 import java.awt.FontMetrics; 42 import java.awt.Graphics; 43 import java.awt.geom.Rectangle2D; 44 import java.awt.font.FontRenderContext; 45 import java.awt.font.GlyphVector; 46 import java.awt.font.LineMetrics; 47 48 public class QtFontMetrics extends FontMetrics 49 { 50 51 private long nativeObject; 52 private QtFontPeer peer; 53 QtFontMetrics( Font f )54 public QtFontMetrics( Font f ) 55 { 56 super( f ); 57 if(f.getPeer() == null || !(f.getPeer() instanceof QtFontPeer)) 58 throw new IllegalArgumentException("Invalid Font object."); 59 peer = (QtFontPeer) f.getPeer(); 60 init( peer ); 61 } 62 QtFontMetrics( Font f, Graphics g )63 public QtFontMetrics( Font f, Graphics g ) 64 { 65 super( f ); 66 if(f.getPeer() == null || !(f.getPeer() instanceof QtFontPeer)) 67 throw new IllegalArgumentException("Invalid Font object."); 68 if( !(g instanceof QtGraphics) ) 69 throw new IllegalArgumentException("Invalid graphics object."); 70 peer = (QtFontPeer) f.getPeer(); 71 initGraphics(peer, (QtGraphics)g ); 72 } 73 QtFontMetrics( QtFontPeer f, Graphics g )74 QtFontMetrics( QtFontPeer f, Graphics g ) 75 { 76 super( null ); 77 if( !(g instanceof QtGraphics) ) 78 throw new IllegalArgumentException("Invalid graphics object."); 79 peer = f; 80 initGraphics(peer, (QtGraphics)g ); 81 } 82 QtFontMetrics( QtFontPeer fp )83 public QtFontMetrics( QtFontPeer fp ) 84 { 85 super( (Font)null ); 86 peer = fp; 87 init( peer ); 88 } 89 init(QtFontPeer fp)90 private native void init(QtFontPeer fp); 91 initGraphics(QtFontPeer fp, QtGraphics g)92 private native void initGraphics(QtFontPeer fp, QtGraphics g); 93 dispose()94 private native void dispose(); 95 getStringBounds(String s)96 native Rectangle2D getStringBounds(String s); 97 98 // ****************** Package private *************************** 99 canDisplay( char c )100 native boolean canDisplay( char c ); 101 102 // ****************** Public methods **************************** 103 getAscent()104 public native int getAscent(); 105 getDescent()106 public native int getDescent(); 107 getHeight()108 public native int getHeight(); 109 getLeading()110 public native int getLeading(); 111 getMaxAdvance()112 public native int getMaxAdvance(); 113 charWidth(char c)114 public native int charWidth(char c); 115 charsWidth(char[] chars, int off, int len)116 public int charsWidth(char[] chars, int off, int len) 117 { 118 return stringWidth( new String(chars, off, len) ); 119 } 120 stringWidth(String str)121 public native int stringWidth(String str); 122 getStringBounds(String str, Graphics context)123 public Rectangle2D getStringBounds(String str, Graphics context) 124 { 125 QtFontMetrics fm = new QtFontMetrics(peer, context); 126 return fm.getStringBounds( str ); 127 } 128 } 129