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

   1: /* GtkListPeer.java -- Implements ListPeer with GTK
   2:    Copyright (C) 1998, 1999, 2006 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.AWTEvent;
  42: import java.awt.Dimension;
  43: import java.awt.FontMetrics;
  44: import java.awt.List;
  45: import java.awt.event.KeyEvent;
  46: import java.awt.event.MouseEvent;
  47: import java.awt.peer.ListPeer;
  48: 
  49: public class GtkListPeer extends GtkComponentPeer
  50:   implements ListPeer
  51: {
  52:   void create ()
  53:   {
  54:     List list = (List) awtComponent;
  55: 
  56:     create (list.getRows ());
  57: 
  58:     setMultipleMode (list.isMultipleMode ());
  59:   }
  60: 
  61:   native void create (int rows);
  62:   native void connectSignals ();
  63: 
  64:   /**
  65:    * Overridden to set the Font of the text insode the gtk_scrolled_window.
  66:    */
  67:   protected native void gtkWidgetModifyFont (String name, int style, int size);
  68: 
  69:   native void gtkWidgetRequestFocus ();
  70: 
  71:   native void getSize (int rows, int visibleRows, int dims[]);
  72: 
  73:   public GtkListPeer (List list)
  74:   {
  75:     super (list);
  76: 
  77:     setMultipleMode (list.isMultipleMode ());
  78: 
  79:     if (list.getItemCount () > 0)
  80:       append (list.getItems ());
  81:   }
  82: 
  83:   native void append (String items[]);
  84: 
  85:   public native void add (String item, int index);
  86: 
  87:   public void addItem (String item, int index)
  88:   {
  89:     add (item, index);
  90:   }
  91: 
  92:   public void clear ()
  93:   {
  94:     removeAll ();
  95:   }
  96: 
  97:   public native void delItems (int start, int end);
  98:   public native void deselect (int index);
  99: 
 100:   public Dimension getMinimumSize (int rows)
 101:   {
 102:     return minimumSize (rows);
 103:   }
 104: 
 105:   public Dimension getPreferredSize (int rows)
 106:   {
 107:     return preferredSize (rows);
 108:   }
 109: 
 110:   public native int[] getSelectedIndexes ();
 111:   public native void makeVisible (int index);
 112: 
 113:   public Dimension minimumSize (int rows)
 114:   {
 115:     int dims[] = new int[2];
 116: 
 117:     int visibleRows = ((List) awtComponent).getRows();
 118:     getSize (rows, visibleRows, dims);
 119:     return new Dimension (dims[0], dims[1]);
 120:   }
 121: 
 122:   public Dimension preferredSize (int rows)
 123:   {
 124:     // getSize returns the minimum size of the list.
 125:     // The width is too narrow for a typical list.
 126:     List l = (List) awtComponent;
 127:     Dimension d = getMinimumSize();
 128:     FontMetrics fm = l.getFontMetrics(l.getFont());
 129:     return new Dimension(d.width + fm.stringWidth("1234567890"), d.height);
 130:   }
 131: 
 132:   public void removeAll ()
 133:   {
 134:     delItems (0, -1);
 135:   }
 136: 
 137:   public native void select (int index);
 138:   public native void setMultipleMode (boolean b);
 139: 
 140:   public void setMultipleSelections (boolean b)
 141:   {
 142:     setMultipleMode (b);
 143:   }
 144: 
 145:   public void handleEvent (AWTEvent e)
 146:   {
 147:     if (e.getID () == MouseEvent.MOUSE_CLICKED && isEnabled ())
 148:       {
 149:         // Only generate the ActionEvent on the second click of a
 150:         // multiple click.
 151:         MouseEvent me = (MouseEvent) e;
 152:         if (!me.isConsumed ()
 153:             && (me.getModifiersEx () & MouseEvent.BUTTON1_DOWN_MASK) != 0
 154:             && me.getClickCount() == 2)
 155:           {
 156:             String selectedItem = ((List) awtComponent).getSelectedItem ();
 157: 
 158:             // Double-click only generates an Action event if
 159:             // something is selected.
 160:             if (selectedItem != null)
 161:               postActionEvent (((List) awtComponent).getSelectedItem (),
 162:                                me.getModifiersEx ());
 163:           }
 164:       }
 165: 
 166:     if (e.getID () == KeyEvent.KEY_PRESSED)
 167:       {
 168:         KeyEvent ke = (KeyEvent) e;
 169:         if (!ke.isConsumed () && ke.getKeyCode () == KeyEvent.VK_ENTER)
 170:           {
 171:             String selectedItem = ((List) awtComponent).getSelectedItem ();
 172: 
 173:             // Enter only generates an Action event if something is
 174:             // selected.
 175:             if (selectedItem != null)
 176:               postActionEvent (selectedItem, ke.getModifiersEx ());
 177:           }
 178:       }
 179: 
 180:     super.handleEvent (e);
 181:   }
 182: 
 183:   protected void postItemEvent (int item, int stateChange)
 184:   {
 185:     postItemEvent (new Integer (item), stateChange);
 186:   }
 187: }