torrentoptionsview.java

这是一个基于java编写的torrent的P2P源码

			gridData = new GridData();
			GenericBooleanParameter	max_peers_when_seeding_enabled = 
				new GenericBooleanParameter( 
						ds_param_adapter, 
						cMaxPeersOptionsArea, 
						DownloadManagerState.PARAM_MAX_PEERS_WHEN_SEEDING_ENABLED,
						false,
						TEXT_PREFIX + "alternative.value.enable");
			ds_parameters.put( DownloadManagerState.PARAM_MAX_PEERS_WHEN_SEEDING_ENABLED, max_peers_when_seeding_enabled );
			max_peers_when_seeding_enabled.setLayoutData( gridData );
			
	
			GenericIntParameter max_peers_when_seeding = new GenericIntParameter(
					ds_param_adapter, cMaxPeersOptionsArea,
					DownloadManagerState.PARAM_MAX_PEERS_WHEN_SEEDING);
			ds_parameters.put( DownloadManagerState.PARAM_MAX_PEERS_WHEN_SEEDING, max_peers_when_seeding );
			gridData = new GridData();
			gridData.widthHint = 40;
			max_peers_when_seeding.setLayoutData(gridData);
			
			max_peers_when_seeding_enabled.setAdditionalActionPerformer(
					new ChangeSelectionActionPerformer( max_peers_when_seeding.getControl()));

			
				// max seeds
			
			label = new Label(gTorrentOptions, SWT.NULL);
			gridData = new GridData();
			label.setLayoutData( gridData );
			Messages.setLanguageText(label, TEXT_PREFIX + "max.seeds" );
			
			GenericIntParameter max_seeds = new GenericIntParameter(
					ds_param_adapter, gTorrentOptions,
					DownloadManagerState.PARAM_MAX_SEEDS);
			ds_parameters.put( DownloadManagerState.PARAM_MAX_SEEDS, max_seeds );
			gridData = new GridData();
			gridData.widthHint = 40;
			max_seeds.setLayoutData(gridData);
		}
		
	    Label reset_label = new Label(gTorrentOptions, SWT.NULL );
	    Messages.setLanguageText(reset_label, TEXT_PREFIX + "reset.to.default");

	    Button reset_button = new Button(gTorrentOptions, SWT.PUSH);

	    Messages.setLanguageText(reset_button, TEXT_PREFIX + "reset.button" );

	    reset_button.addListener(SWT.Selection, 
	    		new Listener() 
				{
			        public void 
					handleEvent(Event event) 
			        {
			        	setDefaults();
			        }
			    });
		
		manager.getDownloadState().addListener( this );
	}
	
	protected void
	setDefaults()
	{
		Iterator	it = ds_parameters.keySet().iterator();
		
		while( it.hasNext()){
						
			String	key 	= (String)it.next();

			manager.getDownloadState().setParameterDefault( key );
		}
		
		it = adhoc_parameters.values().iterator();
		
		while ( it.hasNext()){
			
			Object	param 	= it.next();
			
			if ( param instanceof GenericIntParameter ){
				
				GenericIntParameter	int_param = (GenericIntParameter)param;
				
				int_param.setValue( 0, true );
				
			}else{
				Debug.out( "Unknown parameter type: " + param.getClass());
			}
		}
	}
	
	public void
	stateChanged(
		DownloadManagerState			state,
		DownloadManagerStateEvent		event )
	{
		if ( event.getType() == DownloadManagerStateEvent.ET_ATTRIBUTE_WRITTEN ){
			
			String	attribute_name = (String)event.getData();
			
			if ( attribute_name.equals( DownloadManagerState.AT_PARAMETERS )){
				
				Utils.execSWTThread(
					new Runnable()
					{
						public void
						run()
						{
							Iterator	it = ds_parameters.entrySet().iterator();
							
							while( it.hasNext()){
								
								Map.Entry	entry = (Map.Entry)it.next();
								
								String	key 	= (String)entry.getKey();
								Object	param 	= entry.getValue();
								
								if ( param instanceof GenericIntParameter ){
								
									GenericIntParameter	int_param = (GenericIntParameter)param;
									
									int	value = manager.getDownloadState().getIntParameter( key );
									
									int_param.setValue( value );
									
								}else if ( param instanceof GenericBooleanParameter ){
									
									GenericBooleanParameter	bool_param = (GenericBooleanParameter)param;
									
									boolean	value = manager.getDownloadState().getBooleanParameter( key );
									
									bool_param.setValue( value );
									
								}else{
									
									Debug.out( "Unknown parameter type: " + param.getClass());
								}
							}
						}
					},
					true );
			}
		}
	}
	
	public Composite 
	getComposite() 
	{
		return panel;
	}
	
	public String 
	getFullTitle() 
	{
		return MessageText.getString("TorrentOptionsView.title.full");
	}

	public String 
	getData() 
	{
		return( "TorrentOptionsView.title.short" );
	}
	
	public void 
	delete()
	{
		super.delete();
		
		if ( headerFont != null ){
			
			headerFont.dispose();
		}
		
		manager.getDownloadState().removeListener( this );
	}
	
	
	
	protected class
	adhocParameterAdapter
		extends GenericParameterAdapter
	{
		public int
		getIntValue(
			String	key )
		{
			return( getIntValue( key, 0 ));
		}
		
		public int
		getIntValue(
			String	key,
			int		def )
		{
			if ( key == MAX_UPLOAD ){
				return( manager.getStats().getUploadRateLimitBytesPerSecond()/1024);
			}else if ( key == MAX_DOWNLOAD ){
				return( manager.getStats().getDownloadRateLimitBytesPerSecond()/1024);
			}else{
				Debug.out( "Unknown key '" + key + "'" );
				return(0);
			}
		}
		
		public void
		setIntValue(
			String	key,
			int		value )
		{
			if ( value != getIntValue( key )){
				
				if ( key == MAX_UPLOAD ){
					manager.getStats().setUploadRateLimitBytesPerSecond(value*1024);
				}else if ( key == MAX_DOWNLOAD ){
					manager.getStats().setDownloadRateLimitBytesPerSecond(value*1024);
				}else{
					Debug.out( "Unknown key '" + key + "'" );
				}
			}
		}		
	}
	
	protected class
	downloadStateParameterAdapter
		extends GenericParameterAdapter
	{
		public int
		getIntValue(
			String	key )
		{
			return( getIntValue( key, 0 ));
		}
		
		public int
		getIntValue(
			String	key,
			int		def )
		{
			return( manager.getDownloadState().getIntParameter( key ));
		}
		
		public void
		setIntValue(
			String	key,
			int		value )
		{
			if ( value != getIntValue(key)){
				
				manager.getDownloadState().setIntParameter( key, value );
			}
		}	
		
		public boolean
		getBooleanValue(
			String	key )
		{
			return( getBooleanValue(key,false));
		}
		
		public boolean
		getBooleanValue(
			String		key,
			boolean		def )
		{
			return( manager.getDownloadState().getBooleanParameter( key ));
		}
		
		public void
		setBooleanValue(
			String		key,
			boolean		value )
		{
			if ( value != getBooleanValue(key)){
				
				manager.getDownloadState().setBooleanParameter( key, value );
			}
		}
	}
}