Source for gnu.java.awt.peer.qt.QtCheckboxPeer

   1: /* QtCheckboxPeer.java --
   2:    Copyright (C)  2005, 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: package gnu.java.awt.peer.qt;
  39: 
  40: import java.awt.Checkbox;
  41: import java.awt.CheckboxGroup;
  42: import java.awt.event.ItemEvent;
  43: import java.awt.peer.CheckboxPeer;
  44: import java.util.WeakHashMap;
  45: 
  46: public class QtCheckboxPeer extends QtComponentPeer implements CheckboxPeer
  47: {
  48:   private CheckboxGroup group;
  49: 
  50:   // Map QButtonGroup<->CheckboxGroup
  51:   private static WeakHashMap groupMap;
  52: 
  53:   static
  54:   {
  55:     groupMap = new WeakHashMap();
  56:   }
  57: 
  58:   public QtCheckboxPeer( QtToolkit kit, Checkbox owner )
  59:   {
  60:     super( kit, owner );
  61:   }
  62: 
  63:   protected native void init();
  64: 
  65:   protected void setup()
  66:   {
  67:     super.setup();
  68:     setCheckboxGroup( ((Checkbox)owner).getCheckboxGroup() );
  69:     setLabel( ((Checkbox)owner).getLabel() );
  70:     setState( ((Checkbox)owner).getState() );
  71:   }
  72: 
  73:   private void fireToggle(boolean checked)
  74:   {
  75:     if (group == null)
  76:       ((Checkbox)owner).setState( checked );
  77:     else
  78:       if ( checked )
  79:         group.setSelectedCheckbox((Checkbox)owner);
  80: 
  81:     int sel = checked ? ItemEvent.SELECTED : ItemEvent.DESELECTED;
  82:     ItemEvent e = new ItemEvent((Checkbox)owner,
  83:                                 ItemEvent.ITEM_STATE_CHANGED,
  84:                                 ((Checkbox)owner).getLabel(),
  85:                                 sel);
  86:     QtToolkit.eventQueue.postEvent(e);
  87:   }
  88: 
  89:   // ************ Public methods *********************
  90: 
  91:   public void setCheckboxGroup( CheckboxGroup group )
  92:   {
  93:     if(this.group == group)
  94:       return;
  95: 
  96:     // if we change from a checkbox to a radio button or vice versa
  97:     if((this.group == null) != (group == null))
  98:       {
  99:         this.group = group;
 100:         callInit();
 101:         setup();
 102:       }
 103: 
 104:     this.group = group;
 105:   }
 106: 
 107:   public native void setLabel( String label );
 108: 
 109:   public native void setState( boolean state );
 110: 
 111: }