GWT MVP 模式 - 更改事件页面的不同部分

发布于 2024-10-29 14:43:38 字数 963 浏览 7 评论 0原文

我正在使用 MVP 模式创建 GWT 应用程序。我有一个使用 DockLayoutPanel 的索引页。我有 DockerLayoutPanel 的每个部分的视图和演示者（例如：NorthView 和 NorthPresenter）。我的中心面板有四个按钮（NorthBtn、EastBtn、WestBtn、SouthBtn）。 UI 应在dockLayoutPanel 的相应部分中更改任何一个按钮的 onClick。

入口点类：

@Override
public void onModuleLoad() {
    RPCServiceAsync rpcService = GWT.create(RPCService.class);
    HandlerManager eventBus = new HandlerManager(null);
    AppController appViewer = new AppController(rpcService, eventBus);

    appViewer.go(RootLayoutPanel.get());
}

AppController 类具有历史管理和事件处理逻辑的逻辑。（摘自 Google 文章 - 为了处理不特定于任何演示者而是驻留在应用程序层的逻辑，我们将引入 AppController 组件。）

例如，中心面板 I 中 EastBtn 的 onClick添加一个新的历史标记“east”，并调用 onValueChange() 方法。创建了相应的演示者和视图，例如 EastView 和 EastPresenter：

如何使用新创建的面板更新现有的 EastPanel（因为我没有旧面板的句柄）？
如果用户在单击按钮后为该页面添加了书签，并重新访问带有添加书签的链接的页面，则流程将到达 onValueChange 方法并创建 EastView 和 EastPanel。但是，如何重新创建页面的其余部分并更新 EastPanel？

原文

I am creating a GWT application using MVP pattern. I have an index page which uses DockLayoutPanel. I have view and presenter for each section of dockLayoutPanel (ex: NorthView and NorthPresenter). I have four buttons in the center panel (NorthBtn, EastBtn, WestBtn, SouthBtn). onClick of any one of the buttons the UI should change in respective section of dockLayoutPanel.

Entry Point Class:

@Override
public void onModuleLoad() {
    RPCServiceAsync rpcService = GWT.create(RPCService.class);
    HandlerManager eventBus = new HandlerManager(null);
    AppController appViewer = new AppController(rpcService, eventBus);

    appViewer.go(RootLayoutPanel.get());
}

AppController class has the logic for History management and event handling logic. (From Google article - To handle logic that is not specific to any presenter and instead resides at the application layer, we'll introduce the AppController component.)

For example, onClick of a EastBtn in center panel I add a new history token, "east", and onValueChange() method is called. The respective presenter and view is created, say EastView and EastPresenter:

How can I update the existing EastPanel with the newly created panel (as I dont have handle to the old Panel)?
If the user has bookmarked the page after the button click and re-visits the page with bookmarked link, the flow would reach onValueChange method and create EastView and EastPanel. But, how can the rest of the page be re-created and EastPanel be updated?

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