[RFC] BigBanana: mouseless navigation

Pesegato · February 1, 2018, 4:04pm

Well… maybe I’ve mixed things.
The fundamental problem that bigbanana is trying to solve is:

provide a mouseless and keyboardless navigation
provide API for developers and GUI for users for configurable mappings

Therefore, there must be a default activate and back. Besides, Xinput has brought some unification, but I digress.
I also think that “start” should be part of navigation because… well you usually press “start” before playing.
But is up to the game developer to make use of them.

Pesegato · February 1, 2018, 4:05pm

I’ve updated the sources

which include a sample app

github.com

Pesegato/BigBanana/blob/master/src/main/java/com/pesegato/bigbanana/sampleapp/Main.java

package com.pesegato.bigbanana.sampleapp;

import com.jme3.app.SimpleApplication;
import com.jme3.system.AppSettings;
import com.pesegato.bigbanana.*;
import com.simsilica.lemur.GuiGlobals;
import com.simsilica.lemur.style.BaseStyles;

import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;

import static com.pesegato.bigbanana.BigBananaAppState.*;


public class Main extends SimpleApplication implements BigBananaPeel {

    public static final String MY_COOL_ACTION = "my.cool.action";
    public static final String ANOTHER_ACTION = "another.action";

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Any comment is welcome!

pspeed · February 1, 2018, 4:22pm

But it’s not navigating… it’s starting. So I think the it’s up to something above the focus management. As I said, “activate” was kind of already crossing the line and now I’m kind of regretting putting it there since it is also not about focus navigation.

Pesegato · February 1, 2018, 4:41pm

Yes not strictly focus management, but If is used on the menu, to me is not yet game-specific. However, I think you are suggesting me to provide another layer of input group, so that we have

the Lemur navigation
the BigBanana navigation
the game-specific input

All of these will then be mapped on a file and can be changed on a gui.

Pesegato · February 13, 2018, 10:40am

For some reasons, my library works even without this fix.

Also this fix causes an exception when navigating beyond the limits

java.lang.StackOverflowError
at com.simsilica.lemur.component.SpringGridLayout.getChildren(SpringGridLayout.java:418)
at com.simsilica.lemur.core.FocusTraversalAdapter$ChildIterator.(FocusTraversalAdapter.java:175)
at com.simsilica.lemur.core.FocusTraversalAdapter.getNext(FocusTraversalAdapter.java:140)
at com.simsilica.lemur.core.FocusTraversalAdapter.getRelativeFocus(FocusTraversalAdapter.java:111)
at com.simsilica.lemur.core.GuiControl.getRelativeFocus(GuiControl.java:231)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:99)

pspeed · February 13, 2018, 9:14pm

Was there more stack trace than that? Usually for a stack overflow, I expect it to start to repeat at some point.

Pesegato · February 14, 2018, 8:05am

Indeed it does

java.lang.StackOverflowError
at com.simsilica.lemur.component.SpringGridLayout.getChildren(SpringGridLayout.java:418)
at com.simsilica.lemur.core.FocusTraversalAdapter$ChildIterator.(FocusTraversalAdapter.java:175)
at com.simsilica.lemur.core.FocusTraversalAdapter.getNext(FocusTraversalAdapter.java:140)
at com.simsilica.lemur.core.FocusTraversalAdapter.getRelativeFocus(FocusTraversalAdapter.java:111)
at com.simsilica.lemur.core.GuiControl.getRelativeFocus(GuiControl.java:231)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:99)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:106)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:106)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:106)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:106)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:106)
at com.simsilica.lemur.focus.FocusNavigationState.requestChangeFocus(FocusNavigationState.java:106)
…

Last line is repeated many times