old-autovect-branch/libjava/classpath/gnu/java/awt/peer/qt/QtFontMetrics.java

   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
  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
  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
  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
  83   public QtFontMetrics( QtFontPeer fp )
  84   {
  85     super( (Font)null );
  86     peer = fp;
  87     init( peer );
  88   }
  89
  90   private native void init(QtFontPeer fp);
  91
  92   private native void initGraphics(QtFontPeer fp, QtGraphics g);
  93
  94   private native void dispose();
  95
  96   native Rectangle2D getStringBounds(String s);
  97
  98   // ****************** Package private ***************************
  99
 100   native boolean canDisplay( char c );
 101
 102   // ****************** Public methods ****************************
 103
 104   public native int getAscent();
 105
 106   public native int getDescent();
 107
 108   public native int getHeight();
 109
 110   public native int getLeading();
 111
 112   public native int getMaxAdvance();
 113
 114   public native int charWidth(char c);
 115
 116   public int charsWidth(char[] chars, int off, int len)
 117   {
 118     return stringWidth( new String(chars, off, len) );
 119   }
 120
 121   public native int stringWidth(String str);
 122
 123   public Rectangle2D getStringBounds(String str, Graphics context)
 124   {
 125     QtFontMetrics fm = new QtFontMetrics(peer, context);
 126     return fm.getStringBounds( str );
 127   }
 128 }