filedestpaneldescriptor.java

FMJ（freedom media for java)是java视频开发的新选择

/*
 * FileDestPanelDescriptor.java
 *
 * Created on June 20, 2007, 12:59 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package net.sf.fmj.ui.wizards;

import java.io.File;
import java.util.logging.Logger;
import net.sf.fmj.ui.wizard.WizardPanelDescriptor;
import net.sf.fmj.utility.LoggerSingleton;
import net.sf.fmj.utility.URLUtils;

/**
 *
 * @author Ken Larson
 */
public class FileDestPanelDescriptor extends WizardPanelDescriptor 
{
    
	private static final Logger logger = LoggerSingleton.logger;

    public static final String IDENTIFIER = FileDestPanelDescriptor.class.getName();
    
    private final TranscodeWizardResult result;
    private final TranscodeWizardConfig config;
    
    public FileDestPanelDescriptor(final TranscodeWizardConfig config, TranscodeWizardResult result) 
    {
        super(IDENTIFIER, new FileDestPanel());
        this.config = config;
        this.result = result;
    }
        
    public Object getNextPanelDescriptor() 
    {
        return FINISH;
    }
    
    public Object getBackPanelDescriptor() 
    {
        return ContentAndTrackFormatPanelDescriptor.IDENTIFIER;
    }
    
    public FileDestPanel getFileDestPanel()
    {	return (FileDestPanel) getPanelComponent();
    }

   
	public boolean aboutToDisplayPanel(Object prevId)
	{
		if (prevId == getBackPanelDescriptor())
		{	
			if (config.destUrl != null)
				getFileDestPanel().getTextFile().setText(URLUtils.extractValidNewFilePathFromFileUrl(config.destUrl));		
			
			return true;
		}
		return super.aboutToDisplayPanel(prevId);
	}

	public boolean aboutToHidePanel(Object idOfNext)
	{
		if (idOfNext == getNextPanelDescriptor())
		{	// forward transition
			
			String path = getFileDestPanel().getTextFile().getText();
			if (path == null || path.equals(""))
			{	showError("Destination file path may not be blank");
				return false;
			}
			
			try
			{
				config.destUrl = URLUtils.createUrlStr(new File(path));
				result.step4_setDestUrlAndStart(config);
			} catch (WizardStepException e1)
			{
				showError(e1);
				return false;
			}
			
			return true;
		}
		else
		{	return super.aboutToHidePanel(idOfNext);
		}
	}  
}