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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: }