Initial revision

From-SVN: r104578

libjava/classpath/gnu/java/awt/peer/qt/QtFontMetrics.java

@@ -0,0 +1,128 @@
+/* QtFontMetrics.java --
+   Copyright (C)  2005  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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 gnu.java.awt.peer.qt;
+
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.geom.Rectangle2D;
+import java.awt.font.FontRenderContext;
+import java.awt.font.GlyphVector;
+import java.awt.font.LineMetrics;
+
+public class QtFontMetrics extends FontMetrics
+{
+
+  private long nativeObject;
+  private QtFontPeer peer;
+
+  public QtFontMetrics( Font f )
+  {
+    super( f );
+    if(f.getPeer() == null || !(f.getPeer() instanceof QtFontPeer))
+      throw new IllegalArgumentException("Invalid Font object.");
+    peer = (QtFontPeer) f.getPeer();
+    init( peer );
+  }
+
+  public QtFontMetrics( Font f, Graphics g )
+  {
+    super( f );
+    if(f.getPeer() == null || !(f.getPeer() instanceof QtFontPeer))
+      throw new IllegalArgumentException("Invalid Font object.");
+    if( !(g instanceof QtGraphics) )
+      throw new IllegalArgumentException("Invalid graphics object.");
+    peer = (QtFontPeer) f.getPeer();
+    initGraphics(peer, (QtGraphics)g );
+  }
+
+  QtFontMetrics( QtFontPeer f, Graphics g )
+  {
+    super( null );
+    if( !(g instanceof QtGraphics) )
+      throw new IllegalArgumentException("Invalid graphics object.");
+    peer = f;
+    initGraphics(peer, (QtGraphics)g );
+  }
+
+  public QtFontMetrics( QtFontPeer fp )
+  {
+    super( (Font)null );
+    peer = fp;
+    init( peer );
+  }
+
+  private native void init(QtFontPeer fp);
+
+  private native void initGraphics(QtFontPeer fp, QtGraphics g);
+
+  private native void dispose();
+
+  native Rectangle2D getStringBounds(String s);
+
+  // ****************** Package private ***************************
+  
+  native boolean canDisplay( char c );
+
+  // ****************** Public methods ****************************
+
+  public native int getAscent();
+
+  public native int getDescent();
+
+  public native int getHeight();
+
+  public native int getLeading();
+
+  public native int getMaxAdvance();
+
+  public native int charWidth(char c);
+
+  public int charsWidth(char[] chars, int off, int len)
+  {
+    return stringWidth( new String(chars, off, len) );
+  }
+
+  public native int stringWidth(String str);
+
+  public Rectangle2D getStringBounds(String str, Graphics context)
+  {
+    QtFontMetrics fm = new QtFontMetrics(peer, context);
+    return fm.getStringBounds( str );
+  }
+}