showhideactionhandler.java

来自「Java生成PDF Java生成PDF Java生成PDF」· Java 代码 · 共 43 行

// $Id: ShowHideActionHandler.java,v 1.7 2007/09/12 10:04:59 mike Exp $

package org.faceless.pdf2.viewer2.feature;

import org.faceless.pdf2.viewer2.*;
import org.faceless.pdf2.*;
import javax.swing.*;
import java.awt.event.*;

/**
 * Handles the "ShowWidget" and "HideWidget" types of {@link PDFAction}.
 * The name of this feature is "ShowHideActionHandler".
 * <p><i>This code is copyright the Big Faceless Organization. You're welcome to use, modify and distribute it in any form in your own projects, provided those projects continue to make use of the Big Faceless PDF library.</i></p>
 * @since 2.8
 */
public class ShowHideActionHandler extends ActionHandler
{
    private static ShowHideActionHandler instance;
    
    /**
     * Return the ShowHideActionHandler
     */
    public static ShowHideActionHandler getInstance() {
        if (instance==null) instance = new ShowHideActionHandler();
        return instance;
    }

    private ShowHideActionHandler() {
        super("ShowHideActionHandler");
    }

    public boolean matches(DocumentPanel panel, PDFAction action) {
        String type = action.getType();
        return type.equals("ShowWidget") || type.equals("HideWidget");
    }

    public void run(DocumentPanel docpanel, PDFAction action) {
        WidgetAnnotation annot = action.getAnnotation();
        annot.setVisible(action.getType().equals("ShowWidget"));
        docpanel.redraw(annot);
    }
}