Java – Model View Presenter and composite view

I try to follow the MVP (especially passive view) pattern in Java Swing UI applications

The basic design of the application reminds the wizard control The screen is divided into two main parts:

>A positive view@ H_ 404_ 5 @ > a static navigation bar with navigation buttons

The user can use the button to change the active view, but the column is always displayed

In this scenario modeling, I have a bunch of different screens, each with its own presenter, view interface and view implementation (using JPanel) Then I have a shell presenter who uses JFrame to view the framework and view implementation The idea is that the shell will load first and always display, showing the bottom navigation bar and making room for the active view The shell presenter will allow you to set the current active screen, a bit like this:

interface View {
}

class Presenter {
    View view;

    public Presenter(View view) {
        this.view = view;
    }

    public View getView() {
        return view;
    }

}

interface ShellView extends View {
    void setActiveView(View activeView);
}

class ShellPresenter extends Presenter {
    private ShellView shellView;

    public void setActivePresenter(Presenter activePresenter) { 
        shellView.setActiveView(activePresenter.getView());
    }
}

class ShellFrame implements ShellView {
    private JFrame frame;
    private JPanel activePanel;
    private JPanel navigationBar;

    public ShellFrame() {
        Container c = frame.getContentPane();
        c.add(activePanel);
        c.add(navigationBar);
    }

    public setActiveView(View activeView) {
        ???
    }
}

The problem is in the setactiveview method: I'm not sure how to set activeview to activepanel. When the view interface is general, I don't know anything about jpanels Obviously, I don't want my presenters to know jpanels

Solution

Can you modify the definition of view

interface View {
    JComponent getContainer();
}

So that each view can easily get the view content? The shell does not need to know the implementation that returns JComponent