Question

Arrow keys of keyboard not works in TextArea and Texbox after adding as tree item widget in gwt

    public class TreeWidget implements EntryPoint {
          @Override
                public void onModuleLoad() {
                    VerticalPanel panel=new VerticalPanel();
                    TextArea textArea=new TextArea();
                    Tree tree=new Tree();
                    TreeItem item=new TreeItem();
                    item.addItem(textArea);
                    tree.addItem(item);
                    panel.add(tree);
                    RootPanel.get().add(panel);

                }}

}

Answer 1

I think keyboard navigation of the tree is capturing key events.

You can disable it this way: create an instance of tree that doesn’t use keyboard navigation. You must override the method that tells, for each treeitem, if keys are used or not.

Simplest way:

Tree tree = new Tree() {
  @Override
  public boolean isKeyboardNavigationEnabled(TreeItem currentItem) {
     return false; // no items will have key navigation
  }
};

If it works, then the problem is keyboard navigation. You can ask if the tree item is that with the textarea and return false to let the keyboard work for text.