visioeventadapter.java

java 与COM组件的连接桥

package com.jacob.samples.visio;
import com.jacob.com.*;

/**
 * Created as part of sourceforge 1386454 to demonstrate returning values in event handlers
 * @author [e-mail]
 *
 *  You can subclass this class and only implement the methods you're interested in
 */
public class VisioEventAdapter implements VisioEventListener {

	VisioApp app = null;
	
	public VisioEventAdapter(VisioApp pApp){
		app = pApp;
		System.out.println("Event listener constructed");
	}
	
    public void BeforeQuit(Variant[] args){ } 

    public void DocumentChanged(Variant[] args){ 
    	System.out.println("documentChanged()");
    }

    public void DocumentCloseCanceled(Variant[] args){ }

    public void DocumentCreated(Variant[] args){ }

    public void DocumentOpened(Variant[] args){ 
    	System.out.println("DocumentOpened()");
    }

    public void DocumentSaved(Variant[] args){ } 

    public void DocumentSavedAs(Variant[] args){ } 

    public Variant QueryCancelDocumentClose(Variant[] args){
    	System.out.println("QueryCancelDocumentClose()");
    	return new Variant(false);
    }
    
    /**
     * we don't actually let it quit.  We block it so 
     * that we don't have to relaunch when we look at a new document
     */
    public Variant QueryCancelQuit(Variant[] args) { 
    	// these may throw VisioException
    	System.out.println("Saving document, hiding and telling visio not to quit");
   		try {
    	app.save();
    	app.setVisible(false);
    	} catch (VisioException ve){
    		System.out.println("ailed to openFile()");
    		ve.printStackTrace();
    	}
    	return new Variant(true); 
    	}
}