Add param to screen opened via menu item

Support
#1

Is it somehow possible, to pass a dynamic param to a screen that is opened via menu item click?
i want to pass a parameter that is set within runtime and stored in main window.
A session parameter isn’t sufficient because the param should be set differently in each main window.

#4

Hi,

The only thing I can suggest in this case is to add menu items programmatically passing desired params. In order to do this, you need to create a custom main window:

public class ExtAppMainWindow extends AppMainWindow {
    @Subscribe
    protected void onInit(InitEvent event) {
        AppMenu.MenuItem item = mainMenu.createMenuItem("demo_NewScreen", "Test", null, menuItem -> {
            Screen screen = screens.create(menuItem.getId(), OpenMode.NEW_TAB,
                    new MapScreenOptions(ImmutableMap.of("testParam", "testValue")));
            screens.showFromNavigation(screen);
        });
        mainMenu.addMenuItem(item, 0);
    }
}

As the result, you can handle params in screen controller:

@UiController("demo_NewScreen")
@UiDescriptor("new-screen.xml")
public class NewScreen extends Screen {
    @Inject
    private Label<String> info;

    @Subscribe
    protected void onInit(InitEvent event) {
        ScreenOptions options = event.getOptions();
        if (options instanceof MapScreenOptions) {
            Map<String, Object> params = ((MapScreenOptions) options).getParams();
            info.setValue(String.valueOf(params));
        }
   }
}

Also, I’ve created a GitHub issue.

In addition, there is another way of passing parameters to screens.

Regards,
Gleb

#5

Thank you for your suggestions. I’ll see if i’ve can use one of them