Keyboard.java :  » UnTagged » alaus-radaras » alaus » radaras » client » Android Open Source

package alaus.radaras.client;

import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.Window.ClosingEvent;
import com.google.gwt.user.client.Window.ClosingHandler;

public final class Keyboard {
  private static final class CloseListener implements ClosingHandler {
    public native void onWindowClosed()
    /*-{
      $doc.onkeydown = null;
      $doc.onkeypress = null;
      $doc.onkeyup = null;
    }-*/;

    public String onWindowClosing() {
      return null;
    }

    private native void init()
    /*-{
      $doc.onkeydown = function(evt) {
        @alaus.radaras.client.Keyboard::onKeyDown(Lcom/google/gwt/user/client/Event;)(evt
      || $wnd.event);
      }
      $doc.onkeypress = function(evt) {
        @alaus.radaras.client.Keyboard::onKeyPress(Lcom/google/gwt/user/client/Event;)(evt
      || $wnd.event);
      }
      $doc.onkeyup = function(evt) {
        @alaus.radaras.client.Keyboard::onKeyUp(Lcom/google/gwt/user/client/Event;)(evt
      || $wnd.event);
      }
    }-*/;

    @Override
    public void onWindowClosing(ClosingEvent event) {
      onWindowClosed();
    }

  }

  static void init () {
    CloseListener closeListener = new CloseListener();
    Window.addWindowClosingHandler(closeListener);
    closeListener.init();
  }

  private static void onKeyDown(Event event) {    
    char keyCode = (char) DOM.eventGetKeyCode(event);
    // ....your code here....
  }

  private static void onKeyPress(Event event) {
    char keyCode = (char) DOM.eventGetKeyCode(event);
    Window.alert("Code " + event.getKeyCode());
  }

  private static void onKeyUp(Event event) {
    char keyCode = (char) DOM.eventGetKeyCode(event);
    // ....your code here....
  }

  /**
   * Prevent instantiation.
   */
  private Keyboard() {
  }
}