title: Use selectAll() in a GWT TextArea
body: <p>My GWT page has a TextArea and I would like it to have the focus and to have all the text selected just when this page is loaded. I try the code below but it does not work at all. Can you help me? Thanks</p>
  
  <pre><code>final TextArea myText = new TextArea();
  myText.setCharacterWidth(50);
  myText.setVisibleLines(20);
  myText.setText("Just try something");
  RootPanel.get("textContainer").add(myText);
  myText.setVisible(true);
  myText.setFocus(true);
  myText.selectAll();
  </code></pre>