GWT：在弹出窗口阻止程序阻止RPC之后打开窗口

问题描述：

您好我有以下代码：

Hi I have a following code:

    button.addClickHandler( new ClickHandler( ) {
        @Override   
        public void onClick( ClickEvent event ) {    
             Call 1 --> Window.open( publicBookingUrl, "_blank", null );                
            dispatcher.execute( new HasServicesAction(true), 
                    new ActionCallback<SomeResult>( ){       
                @Override 
                public void onSuccess( SomeResult result ) {
             Call 2 --> Window.open( publicBookingUrl, "_blank", null );
                } 
            });  
        }        
    });

在通话1弹出窗口阻止程序不会阻止打开弹出窗口。它成功地在新选项卡或新窗口中打开窗口。然而在Call2中，弹出式窗口拦截器会阻止弹出窗口，所以用户必须明确地启用弹出窗口
我发现了一篇文章，解释了此背后的推理： https://groups.google.com/forum/?fromgroups=#!topic/google-web-toolkit/V0s7goJxuhc
不幸的是，此解决方案对我无效。

In Call 1 popup blocker does not block the popup from opening. It successfully opens a window in a new tab or in new window. In Call2 however popup blocker will prevent popup, so user have to explicitly enable popup. I found a post explaining the reasoning behind this: https://groups.google.com/forum/?fromgroups=#!topic/google-web-toolkit/V0s7goJxuhc Unfortunately this solution doesn't work for me.

有谁知道为什么会出现这种情况？我们如何解决这个问题？

Does anyone know why this is the case? How can we get around this?

预先感谢。

答

由于您链接到的页面显示，因此只能通过直接用户操作打开窗口。您可以通过在RPC调用之前打开窗口并在RPC调用返回后设置窗口的URL来解决此问题。 GWT内置的 Window 不会公开所有底层的窗口对象的属性，因此自定义实现是必需的：

As the page you linked to indicated, windows may only be opened as a result of a direct user action. You can get around this by opening the window before your RPC call and setting the URL of the window after the RPC call returns. GWT's built-in Window doesn't expose all of the underlying window object's properties, so a custom implementation is necessary:

public class MyWindow extends JavaScriptObject {
  // All types that extend JavaScriptObject must have a protected,
  // no-args constructor. 
  protected MyWindow() {}

  public static native MyWindow open(String url, String target, String options) /*-{
    return $wnd.open(url, target, options);
  }-*/;

  public native void close() /*-{
    this.close();
  }-*/;

  public native void setUrl(String url) /*-{
    if (this.location) {
      this.location = url;
    }
  }-*/;
}

然后在您的点击处理程序中：

Then in your click handler:

public void onClick(ClickEvent event) {
  final MyWindow window = MyWindow.open(null, "_blank", null);

  dispatcher.execute(new HasServicesAction(true), 
      new ActionCallback<SomeResult>( ){       
        @Override 
        public void onSuccess(SomeResult result) {
          if (result.isGood()) {
            window.setUrl(publicBookingUrl);
          } else {
            window.close();
          }
        }
      });  
}

请注意，如果您调用 setUrl（） 更改您赢得打开窗口的原点'之后可以修改任何属性或调用任何功能。

Note that, if your call to setUrl() changes the origin of the opened window you won't be able to modify any properties or call any functions afterwards.

GWT：在弹出窗口阻止程序阻止RPC之后打开窗口

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