Source for gnu.java.awt.peer.gtk.GtkTextAreaPeer

   1: /* GtkTextAreaPeer.java -- Implements TextAreaPeer with GTK
   2:    Copyright (C) 1998, 1999, 2002 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: 
  39: package gnu.java.awt.peer.gtk;
  40: 
  41: import java.awt.Dimension;
  42: import java.awt.Font;
  43: import java.awt.FontMetrics;
  44: import java.awt.Rectangle;
  45: import java.awt.TextArea;
  46: import java.awt.im.InputMethodRequests;
  47: import java.awt.peer.TextAreaPeer;
  48: import java.awt.peer.TextComponentPeer;
  49: 
  50: public class GtkTextAreaPeer extends GtkComponentPeer
  51:   implements TextComponentPeer, TextAreaPeer
  52: {
  53:   private static transient int DEFAULT_ROWS = 10;
  54:   private static transient int DEFAULT_COLS = 80;
  55: 
  56:   native void create (int width, int height, int scrollbarVisibility);
  57: 
  58:   /**
  59:    * Overridden to set Font for text widget inside scrolled window.
  60:    */
  61:   protected native void gtkWidgetModifyFont(String name, int style, int size);
  62: 
  63:   native void gtkWidgetRequestFocus ();
  64: 
  65:   public native void connectSignals ();
  66: 
  67:   public native int getCaretPosition ();
  68:   public native void setCaretPosition (int pos);
  69:   public native int getSelectionStart ();
  70:   public native int getSelectionEnd ();
  71:   public native String getText ();
  72:   public native void select (int start, int end);
  73:   public native void setEditable (boolean state);
  74:   public native void setText (String text);
  75: 
  76:   public int getIndexAtPoint(int x, int y)
  77:   {
  78:     // FIXME
  79:     return 0;
  80:   }
  81: 
  82:   public Rectangle getCharacterBounds (int pos)
  83:   {
  84:     // FIXME
  85:     return null;
  86:   }
  87: 
  88:   public long filterEvents (long filter)
  89:   {
  90:     // FIXME
  91:     return filter;
  92:   }
  93: 
  94:   void create ()
  95:   {
  96:     Font f = awtComponent.getFont ();
  97: 
  98:     // By default, Sun sets a TextArea's font when its peer is
  99:     // created.  If f != null then the peer's font is set by
 100:     // GtkComponent.create.
 101:     if (f == null)
 102:       {
 103:         f = new Font ("Dialog", Font.PLAIN, 12);
 104:         awtComponent.setFont (f);
 105:       }
 106: 
 107:     FontMetrics fm = getFontMetrics (f);
 108: 
 109:     TextArea ta = ((TextArea) awtComponent);
 110:     int sizeRows = ta.getRows ();
 111:     int sizeCols = ta.getColumns ();
 112: 
 113:     sizeRows = sizeRows == 0 ? DEFAULT_ROWS : sizeRows;
 114:     sizeCols = sizeCols == 0 ? DEFAULT_COLS : sizeCols;
 115: 
 116:     int width = sizeCols * fm.getMaxAdvance ();
 117:     int height = sizeRows * (fm.getMaxDescent () + fm.getMaxAscent ());
 118: 
 119:     create (width, height, ta.getScrollbarVisibility ());
 120:     setEditable (ta.isEditable ());
 121:   }
 122: 
 123:   public GtkTextAreaPeer (TextArea ta)
 124:   {
 125:     super (ta);
 126: 
 127:     setText (ta.getText ());
 128:     setCaretPosition (0);
 129:   }
 130: 
 131:   public native void insert (String str, int pos);
 132:   public native void replaceRange (String str, int start, int end);
 133: 
 134:   public Dimension getMinimumSize (int rows, int cols)
 135:   {
 136:     return minimumSize (rows == 0 ? DEFAULT_ROWS : rows,
 137:                         cols == 0 ? DEFAULT_COLS : cols);
 138:   }
 139: 
 140:   public Dimension getPreferredSize (int rows, int cols)
 141:   {
 142:     return preferredSize (rows == 0 ? DEFAULT_ROWS : rows,
 143:                           cols == 0 ? DEFAULT_COLS : cols);
 144:   }
 145: 
 146:   native int getHScrollbarHeight ();
 147:   native int getVScrollbarWidth ();
 148: 
 149:   // Deprecated
 150:   public Dimension minimumSize (int rows, int cols)
 151:   {
 152:     TextArea ta = ((TextArea) awtComponent);
 153:     int height = 0;
 154:     int width = 0;
 155: 
 156:     if (ta.getScrollbarVisibility () == TextArea.SCROLLBARS_BOTH
 157:         || ta.getScrollbarVisibility () == TextArea.SCROLLBARS_HORIZONTAL_ONLY)
 158:       height = getHScrollbarHeight ();
 159: 
 160:     if (ta.getScrollbarVisibility () == TextArea.SCROLLBARS_BOTH
 161:         || ta.getScrollbarVisibility () == TextArea.SCROLLBARS_VERTICAL_ONLY)
 162:       width = getVScrollbarWidth ();
 163: 
 164:     Font f = awtComponent.getFont ();
 165:     if (f == null)
 166:       return new Dimension (width, height);
 167: 
 168:     FontMetrics fm = getFontMetrics (f);
 169: 
 170:     int sizeRows = rows == 0 ? DEFAULT_ROWS : rows;
 171:     int sizeCols = cols == 0 ? DEFAULT_COLS : cols;
 172: 
 173:     width += sizeCols * fm.getMaxAdvance ();
 174:     height += sizeRows * (fm.getMaxDescent () + fm.getMaxAscent ());
 175: 
 176:     return new Dimension (width, height);
 177:   }
 178: 
 179:   public Dimension preferredSize (int rows, int cols)
 180:   {
 181:     TextArea ta = ((TextArea) awtComponent);
 182:     int height = 0;
 183:     int width = 0;
 184: 
 185:     if (ta.getScrollbarVisibility () == TextArea.SCROLLBARS_BOTH
 186:         || ta.getScrollbarVisibility () == TextArea.SCROLLBARS_HORIZONTAL_ONLY)
 187:       height = getHScrollbarHeight ();
 188: 
 189:     if (ta.getScrollbarVisibility () == TextArea.SCROLLBARS_BOTH
 190:         || ta.getScrollbarVisibility () == TextArea.SCROLLBARS_VERTICAL_ONLY)
 191:       width = getVScrollbarWidth ();
 192: 
 193:     Font f = awtComponent.getFont ();
 194:     if (f == null)
 195:       return new Dimension (width, height);
 196: 
 197:     FontMetrics fm = getFontMetrics (f);
 198: 
 199:     int sizeRows = rows == 0 ? DEFAULT_ROWS : rows;
 200:     int sizeCols = cols == 0 ? DEFAULT_COLS : cols;
 201: 
 202:     width += sizeCols * fm.getMaxAdvance ();
 203:     height += sizeRows * (fm.getMaxDescent () + fm.getMaxAscent ());
 204: 
 205:     return new Dimension (width, height);
 206:   }
 207: 
 208:   public void replaceText (String str, int start, int end)
 209:   {
 210:     replaceRange (str, start, end);
 211:   }
 212: 
 213:   public void insertText (String str, int pos)
 214:   {
 215:     insert (str, pos);
 216:   }
 217: 
 218:   public InputMethodRequests getInputMethodRequests()
 219:   {
 220:       // FIXME: implement
 221:     return null;
 222:   }
 223: }