Hello.
I have LayoutContainer with HBoxLayout which placed into LayoutContainer with a TableLayout.
When I resize browser window, TableLayout and HBoxLayout are resizing, but content of HBoxLayout does not do it.
Code:
package com.mySampleApplication.client;
import com.extjs.gxt.ui.client.GXT;
import com.extjs.gxt.ui.client.util.Margins;
import com.extjs.gxt.ui.client.util.Theme;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.Viewport;
import com.extjs.gxt.ui.client.widget.layout.*;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;

/**
 * Entry point classes define <code>onModuleLoad()</code>
 */
public class MySampleApplication implements EntryPoint {
    private Viewport viewport;
    /**
     * This is the entry point method.
     */
    public void onModuleLoad() {
        GXT.setDefaultTheme(Theme.GRAY, true);
        viewport = new Viewport();
        viewport.setLayout(new FlowLayout());
        TableLayout tableLayout =  new TableLayout(2);
        tableLayout.setBorder(2);
        LayoutContainer panel = new LayoutContainer(tableLayout);
        TextBox textBox;
        HBoxLayout hBoxLayout;
        HBoxLayoutData hBoxLayoutData;
        TableData tableData;
        // Adding two TextBoxes to first row in to each Column
        textBox = new TextBox();
        textBox.setWidth("100%");
        tableData = new TableData("100%", "24px");
        panel.add(textBox, tableData);
        textBox = new TextBox();
        textBox.setWidth("100%");
        tableData = new TableData("100%", "24px");
        panel.add(textBox, tableData);
        // Creating HBoxLayout
        LayoutContainer hContainer = new LayoutContainer();
        hBoxLayout = new HBoxLayout();
        hBoxLayout.setHBoxLayoutAlign(HBoxLayout.HBoxLayoutAlign.MIDDLE);
        hContainer.setLayout(hBoxLayout);
        textBox = new TextBox();
        hBoxLayoutData = new HBoxLayoutData(new Margins(0, 5, 0, 5));
        hBoxLayoutData.setFlex(1);
        hContainer.add(textBox, hBoxLayoutData);
        textBox = new TextBox();
        hBoxLayoutData = new HBoxLayoutData(new Margins(0, 5, 0, 5));
        hBoxLayoutData.setFlex(2);
        hContainer.add(textBox, hBoxLayoutData);
        tableData = new TableData("Auto", "100%");
        tableData.setColspan(2);
        hContainer.setHeight("24");
        panel.add(hContainer, tableData);
        viewport.add(panel);
        RootPanel.get().add(viewport);
    }
}