Java 类com.google.gwt.user.client.WindowResizeListener 实例源码

public void onWindowResized(int width, int height) {
    counter = 4;
    this.width = width;
    this.height = height;
    if (timer==null) {
        timer = new Timer() {

            public void run() {
                if (counter>0) {
                    counter--;
                    return;
                }
                //resize
                this.cancel();
                timer = null;
                for (int i=0;i<list.size();i++) {
                    WindowResizeListener listener = (WindowResizeListener)list.get(i);
                    listener.onWindowResized(WindowResizeCacheListener.this.width,WindowResizeCacheListener.this.height);
                }
            }

        };
        timer.scheduleRepeating(150);
    }
}

/**
 * Initializes the ErrorPopup.
 */
ErrorPopup() {
  super(true); //constructor for PopupPanel class. "True" initializes the "auto-hide" variable


  // I'm leaving this setSTyleName line here as a comment, to show the typical way to define
  // the style.
  // I would have preferred to use this method rather than constructing the HTML by hand,
  // but it seems that GWT doesn't let the StyleName to be switched dynamically.
  // setStyleName("ode-ErrorMessage");

  messageLabel = new HTML();
  setWidget(messageLabel);

  // Recenter the message when the window is resized.
  // TODO(halabelson): replace the deprecated methods
  Window.addWindowResizeListener(new WindowResizeListener() {
    @Override
    public void onWindowResized(int width, int height) {
      centerTopPopup();
    }
  });

  // Reposition the message to the top of the screen when the
  // window is scrolled
  // TODO(halabelson): get rid of the flashing on vertical scrolling
  Window.addWindowScrollListener(new WindowScrollListener() {
    @Override
    public void onWindowScrolled(int scrollLeft, int scrollTop) {
      centerTopPopup();
    }
  });
}

/**
 * Initializes the LoadingPopup.
 */
public RpcStatusPopup() {
  super(/* autoHide = */ false);
  setStyleName("ode-RpcStatusMessage");
  setWidget(label);

  // Re-center the loading message when the window is resized.
  // TODO(halabelson): Replace the deprecated methods
  Window.addWindowResizeListener(new WindowResizeListener() {
    @Override
    public void onWindowResized(int width, int height) {
      positionPopup(getOffsetWidth());
    }
  });

  // Reposition the message to the top of the screen when the
  // window is scrolled
  // TODO(halabelson): get rid of the flashing on vertical scrolling
  Window.addWindowScrollListener(new WindowScrollListener() {
    @Override
    public void onWindowScrolled(int scrollLeft, int scrollTop) {
      positionPopup(getOffsetWidth());
    }
  });

  // Position the popup before showing it to prevent flashing.
  setPopupPositionAndShow(new PopupPanel.PositionCallback() {
    @Override
    public void setPosition(int offsetWidth, int offsetHeight) {
      positionPopup(offsetWidth);
    }
  });
}

public void remove(WindowResizeListener listener) {
    for (int i=0;i<list.size();i++) {
        if (list.get(i)==listener) {
            list.remove(i);
            return;
        }
    }
}

public static void addResizeListener(WindowResizeListener listener) {
    instance.add(listener);
}

public static void removeResizeListener(WindowResizeListener listener) {
    instance.remove(listener);
}

private WindowResizeCacheListener(){
    list = new ArrayList<WindowResizeListener>();
    height = Window.getClientHeight();
    width = Window.getClientWidth();
    Window.addWindowResizeListener(this);
}

public void add(WindowResizeListener listener) {
    list.add(listener);

}