Uncaught JavaScript exception [uncaught exception: java.lang.AssertionError...

[lorizio49]

Hello

I am trying to put many component in a canvas and I have an error that I don't understand.
I am using development mode plugin for eclipse and when I try to show my canvas I see nothing and in the console I have this message :

Uncaught JavaScript exception [uncaught exception: java.lang.AssertionError: A widget that has an existing parent widget may not be added to the detach list] in , line 0

This is my class :

import com.google.gwt.user.client.ui.TextBox;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.grid.ListGridField;
import com.smartgwt.client.widgets.layout.HLayout;
import com.smartgwt.client.widgets.layout.VLayout;

import fr.vif.vif5_7.browser.client.login.user.model.DataExampleUser;


/**
 * TODO Write the class' description.
 *
 * @author sv2
 */
public class FirstFunction extends Canvas {

    private VLayout  vlayout  = null;

    private ListGrid listGrid = new ListGrid();

    public FirstFunction() {
        super();
        initialize();
    }

    private void initialize() {
        this.addChild(getVLayout());
    }

    public VLayout getVLayout() {
        if (vlayout == null) {
            vlayout = new VLayout();
        }
        vlayout.setHeight("100%");
        vlayout.setWidth("100%");

        vlayout.addMember(getListGrid());
        vlayout.addMember(getUserFormLine());

        vlayout.draw();
        return vlayout;
    }

    public ListGrid getListGrid() {
        if (listGrid == null) {
            listGrid = new ListGrid();
        }

        ListGridField userCodeField = new ListGridField("codeUser", "Utilisateur");
        ListGridField userLabelField = new ListGridField("libelleUser", "Libelle");
             
        listGrid.setFields(new ListGridField[] { userCodeField, userLabelField });

        listGrid.setData(DataExampleUser.getRecords());
        listGrid.setHeight("80%");
        listGrid.setWidth("100%");
        listGrid.setAlternateRecordStyles(true);
        return listGrid;
    }

    public HLayout getUserFormLine() {
        HLayout hlayout = new HLayout();
        com.smartgwt.client.widgets.Label lab = new com.smartgwt.client.widgets.Label("Utilisateur :");
        TextBox textBoxCode = new TextBox();
        hlayout.addMember(lab);
        TextBox textBoxLabel = new TextBox();

        hlayout.addMember(textBoxCode);
        hlayout.addMember(textBoxLabel);
        return hlayout;
    }

}

When I just add the ListGrid to the Canvas there is no problem but when i try to add my HLayout the error message appear.

The message said a widget had already a parent but all my component just have one so I am a little lost.

What could be wrong in my code?

Thank you for any advice.

[bhathiya99]

I do have same problem now it is headace for me..

[Cavaleiro]

I have +- the same problem.

[Isomorphic]

See FAQ - don't mix GWT and SmartGWT widgets expect in specific circumstances.