EditorUI.java 文件源码

/** Construct extended UI for the use with a text component */
public EditorUI() {
    focusL = new FocusAdapter() {
                 public @Override void focusGained(FocusEvent evt) {
                     /* Fix of #25475 - copyAction's enabled flag
                      * must be updated on focus change
                      */
                     stateChanged(null);
                     if (component!=null){
                        BaseTextUI ui = (BaseTextUI)component.getUI();
                        if (ui!=null) ui.refresh();
                     }
                 }

                 @Override
                 public void focusLost(FocusEvent e) {
                     // see #222935, update actions before menu activates
                     if (e.isTemporary()) {
                         doStateChange(true);
                     }
                 }
             };

    getToolTipSupport();
}