Embed IECanvas in a JPanel

[Kevin Amerson]

Hello,  I know I'm not supposed to really embed IECanvas in a lightweight component, however, is it possible to embed the canvas in a JPanel?

When I try this, the canvas is created and I can interact with it in code, however, it is not visible on the JPanel.  Any ideas? am I just plain nuts?

[nereida hoxhaj]

I tried it too but nothing! I even tried a JEditorPane... I really need to know it and i'll keep trying. If you find the solution please let me know.
Good luck!

[Torgeir Veimo]

It's been a while since I last looked into the details of a JPanel, but in essence, the IE instance needs to attach itself to a windows instance pointed to by the hwnd variable. I don't know if it's possible with a JPanel. A heavyweight window is required, since a lightweight one doesn't have its own window instance.

[Prasad]

Hello,

Yes its possible to embed canvas in JPanel and then use that canvas to host IECanvas. I have done the same and it works correctly. However Please note that since the canvas is a heavy weight component which is hosted in a light weight component, it will always be on top.

My two pence.
Prasad.

[nereida hoxhaj]

What about a heavyweight component like java.awt.Panel...

public void addBrowserWindow(IECanvas w) {
     canvas = w;      
    Panel pnl = new java.awt.Panel();
    getContentPane().add(pnl, BorderLayout.CENTER);
    getContentPane().add(w, BorderLayout.CENTER);
    }

However what i need to do is to manage mouse events...

pnl.addMouseListener(new java.awt.event.MouseAdapter() {
  public void mouseClicked(java.awt.event.MouseEvent evt) {
                System.out.println("click x: " + evt.getPoint().x + " y: " + evt.getPoint().y);
            }
        });

i tried this but i got nothing, i know it will be on top that's why i can't get mouse position. Can you give me a hand?

[Kevin Amerson]

Ok one hack is to get the canvas to attach itself to a JFrame (IEBrowser), keep the JFrame invisible and then grab its contentpanel and add that to the JPanel

:)

canvas = new IECanvas(false);
canvas.addIEEventListener(this);
browser = new IEBrowser(urlString);
canvas.addIEEventListener(browser);

browser.addBrowserWindow(canvas);
browser.setBounds(300, 300, 500, 300);

this.add(browser.getContentPane(), BorderLayout.CENTER);

----
Kevin

[nereida hoxhaj]

Thanx Kevin for the post, i'll try this out and let you know.

[Nimesh]

I tried what you said Kevin, but still it doesn't work. Any other ideas?

[Victor Vess]

I have been working on a derivative of IECanvas, and I needed to fit my solution into an interface that returned a JComponent.  I noticed some quirkiness with layout managers that can make this tricky.

I don't have exact code for you since I wasn't using IECanvas directly, but here is something to try:

IECanvas canvas = new IECanvas(false);
canvas.addIEEventListener(b);
JPanel pnl = new JPanel(new GridLayout(1, 1));
pnl.add(canvas);

One thing I noticed was that with the default layout manager, it never seemed to size itself correctly within the JPanel.

I really doubt that this will work in any application where you try to treat the JPanel as a lightweight component (like put it inside a JTabbedPane or something like that), you need to treat it like a heavyweight component even though it isn't one.

[Gustaf Duell]

I have done it and it works very fine exept for focus.
To fix a timing issue I made some changes in the package that I have sent to the author.
I did like this (could be improved i guess):

package test;

import java.awt.*;
import javax.swing.*;

import nothome.mswindows.IECanvas;
import nothome.mswindows.IEEventListener;

import java.awt.event.*;

public class BrowserJPanel extends JPanel implements /*ActionListener,*/ IEEventListener
{
    /**
     * Comment for <code>serialVersionUID</code>
     */
    private static final long serialVersionUID = 3038318532151369045L;
    protected IECanvas      m_IECanvas;
    protected boolean       m_ShowContextMenu=false;
   

    public BrowserJPanel() {
        BrowserJPanel    me = this;
        me.setLayout(new BoxLayout(me, BoxLayout.Y_AXIS));
        //this.setBackground(Color.YELLOW);

        /*urlField = new JTextField();
        Dimension d = new Dimension(1,1);

        JPanel upperPanel = new JPanel();
        upperPanel.setLayout(new GridLayout());
        upperPanel.add(urlField);
        upperPanel.setPreferredSize(d);
        upperPanel.setMaximumSize(d);
           me.add(upperPanel);
       */
      
        m_IECanvas = new IECanvas(false);
        m_IECanvas.addIEEventListener(me);
        me.add(m_IECanvas);       
    }

        // We initialize the IECanvas on addNotify.
    public void addNotify() {
        super.addNotify();
    }

    // IEEventListener impl.

    public void onStatusTextChange(String status) {
    if(status.indexOf("WM_CLOSE")>=0){
        onQuit();
    }
    else{
    }
    }

    public void onTitleChange(String status) {
    }

    public void onDocumentComplete(String status) {
        //urlField.setText("hghhh");
    this.validate();
//    this.validateTree();
    }

    public void onBeforeNavigate2(String url) {
        System.out.println("java: OnBeforeNaviate2: " + url);
//        urlField.setText(url);
    }

    public void onNavigateComplete2(String status) {
//        statusLabel.setText(status);
    }

    public void onDownloadComplete() {
    }

    public void onProgressChange(int progress, int max) {
        System.out.println("java: progress: " + progress + ", max: " + max);
    }

    public void onCommandStateChange(int command, boolean enabled) {
    }

    public void onQuit() {
    System.out.println("onQuit()\n");
    //navigateTo("about:blank");
    m_IECanvas.removeIEEventListener(this);
    //this.m_IECanvas.setURL("http://www.dn.se");

//    System.exit(0);
    }

    public boolean showContextMenu()  {
        return m_ShowContextMenu;
    }
   
    public void navigateTo(String urlString)
    {
      m_IECanvas.setURL(urlString);       
    }

    public static void main(String[] argv) {
//        String urlString = "http://www.dn.se";
        String urlString = "http://www.idg.se";
        if(argv.length > 0)
            urlString = argv[0];

        JFrame f = new JFrame();
        f.getContentPane().setLayout(new GridLayout(1,1,0,0));
        f.setBackground(Color.GREEN);
        f.setTitle("Mentice Embedded Browser");
        JTabbedPane tabp = new JTabbedPane();
       

        WindowListener l = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        };
        f.addWindowListener(l);
               
        BrowserJPanel b     = new BrowserJPanel();
        BrowserJPanel b1     = new BrowserJPanel();
        BrowserJPanel b2     = new BrowserJPanel();
       
       
//        f.getContentPane().add(b);       
//        f.getContentPane().add(b1);
//        f.getContentPane().add(b2);
        tabp.addTab("b", b);
        tabp.addTab("b1", b1);
        tabp.addTab("b2", b2);

        f.getContentPane().add(tabp);   
       
        f.setVisible(true);
    f.setLocation(50,50);
    f.setSize(500,500);
    f.validate();
//     b.navigateTo(urlString);
//    b.validateTree();

    try
    {
        Thread.sleep(50);
    }
    catch (InterruptedException e)
    {
    }
   
      b.navigateTo(urlString);
      b1.navigateTo("http://www.aftonbladet.se");
      b2.navigateTo("http://www.expressen.se");
   

    }

    /* (non-Javadoc)
     * @see nothome.mswindows.IEEventListener#oneParamCallBack(java.lang.String)
     */
    public void oneParamCallBack(String param1)
    {
        // Keep this empty
       
    }

    /* (non-Javadoc)
     * @see nothome.mswindows.IEEventListener#twoParamCallBack(java.lang.String, java.lang.String)
     */
    public void twoParamCallBack(String param1, String param2)
    {
        // Keep this empty
       
    }
}