在 Vaadin 7 中,将数据/参数传递给 BrowserWindowOpener 的新 UI 实例? [英] In Vaadin 7, pass data/arguments to new UI instance of BrowserWindowOpener?
问题描述
我使用 BrowserWindowOpener.
问题:如何向新实例化的 UI 子类传递一些信息?
Question: How do I pass some information to the newly instantiated UI subclass?
语法要求我指定一个要实例化的类.我如何与未来的实例通信?
The syntax requires that I specify a class to be instantiated. How do I communicate with that future instance?
BrowserWindowOpener bookOpener = new BrowserWindowOpener( BookUI.class );
例如,假设我的应用打开了一个窗口,其中列出了以特定字母 (A-Z) 开头的单词的单词定义.如何告诉新打开的 UI 应该显示A"字、B"字或V"字?
For example, let's say my app opens a window listing word definitions for words starting with a particular letter of the alphabet (A-Z). How do I tell the newly opening UI that it should show the "A" words, the "B" words, or the "V" words?
我注意到 BrowserWindowOpenerState 类,但它的用途是没有记录.
I noticed the BrowserWindowOpenerState class, but its use is not documented.
推荐答案
我还没有尝试过这个,但是快速浏览一下 javadoc 建议使用 BrowserWindowOpener#setParameter 或 BrowserWindowOpener#setUriFragment 可以传递参数进入用户界面.
I have not tried this, but a quick look at the javadoc suggests that by using BrowserWindowOpener#setParameter or BrowserWindowOpener#setUriFragment you can pass parameters into the UI.
例如
BrowserWindowOpener bookOpener = new BrowserWindowOpener( BookUI.class );
bookOpener.setParameter("startLetter", "A");
...
class BookUI {
protected abstract void init(VaadinRequest request){
String startLetter = request.getParameter("startLetter");
// Etc
}
}
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