ZK的server push问题

关于server push在ZK官网有很多说明，但在应用中却老是刷新不了前台组件的信息，后来看了篇帖子才豁然开朗：
http://www.zkoss.org/forum/listComment/15408：

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You'll have to enable serverPush before you can use it in a thread Please change LauncherApplicationPane() like this:

curr_pm.setValue(percent);
Executions.deactivate(desktop); ?// 必须在修改值之后刷新
System.out.println("Step: " + percent);
System.out.println(percent);
}
} finally {
Executions.deactivate(desktop);
}
} catch (DesktopUnavailableException ex) {
ex.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
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