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

   1: /* QtCheckboxPeer.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.Rectangle;
  41: import java.awt.Checkbox;
  42: import java.awt.CheckboxGroup;
  43: import java.awt.event.ItemEvent;
  44: import java.awt.peer.CheckboxPeer;
  45: import java.util.WeakHashMap;
  46: 
  47: public class QtCheckboxPeer extends QtComponentPeer implements CheckboxPeer
  48: {
  49:   private CheckboxGroup group;
  50: 
  51:   // Map QButtonGroup<->CheckboxGroup
  52:   private static WeakHashMap groupMap;
  53: 
  54:   static 
  55:   {
  56:     groupMap = new WeakHashMap();
  57:   }
  58:   
  59:   public QtCheckboxPeer( QtToolkit kit, Checkbox owner )
  60:   {
  61:     super( kit, owner );
  62:   }
  63:   
  64:   protected native void init();
  65:   
  66:   protected void setup()
  67:   {
  68:     super.setup();
  69:     setCheckboxGroup( ((Checkbox)owner).getCheckboxGroup() );
  70:     setLabel( ((Checkbox)owner).getLabel() );
  71:     setState( ((Checkbox)owner).getState() );
  72:   }
  73: 
  74:   private void fireToggle(boolean checked)
  75:   {
  76:     if (group == null)
  77:       ((Checkbox)owner).setState( checked ); 
  78:     else
  79:       if ( checked )
  80:     group.setSelectedCheckbox((Checkbox)owner);
  81: 
  82:     int sel = checked ? ItemEvent.SELECTED : ItemEvent.DESELECTED;
  83:     ItemEvent e = new ItemEvent((Checkbox)owner, 
  84:                 ItemEvent.ITEM_STATE_CHANGED, 
  85:                 ((Checkbox)owner).getLabel(),
  86:                 sel);
  87:     QtToolkit.eventQueue.postEvent(e);
  88:   }
  89:   
  90:   // ************ Public methods *********************
  91:   
  92:   public void setCheckboxGroup( CheckboxGroup group )
  93:   {    
  94:     if(this.group == group) 
  95:       return;
  96: 
  97:     // if we change from a checkbox to a radio button or vice versa
  98:     if((this.group == null) != (group == null))
  99:       {
 100:     this.group = group;
 101:     callInit();
 102:     setup();
 103:       }
 104: 
 105:     this.group = group;
 106:   }
 107: 
 108:   public native void setLabel( String label );
 109: 
 110:   public native void setState( boolean state );
 111: 
 112: }
 113: