Now that my game takes a few seconds to load i now need to implement a loading screen. I was trying to use the progress bar from the nifty tutorial.
[java]public class MainMenu implements ScreenController {
public Nifty nifty;
private TestingPhysicsCollisions myApp;
private Element progressBarElement;
private NiftyJmeDisplay niftyDisplay;
private Future future = null;
private ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(2);
public MainMenu() {
myApp = TestingPhysicsCollisions.getApp();
niftyDisplay = new NiftyJmeDisplay(myApp.getAssetManager(),
myApp.getInputManager(),
myApp.getAudioRenderer(),
myApp.getGuiViewPort());
nifty = niftyDisplay.getNifty();
nifty.fromXml(“Interface/hellojme.xml”, “start”, this);
myApp.getGuiViewPort().addProcessor(niftyDisplay);
}
@Override
public void bind(Nifty nifty, Screen screen) {
final Element element = null;
progressBarElement = nifty.getScreen(“loadlevel”).findElementByName(“progressbar”);
}
@Override
public void onStartScreen() {}
@Override
public void onEndScreen() {}
public boolean inputEvent(final NiftyInputEvent inputEvent) {
return false;
}
public void setProgress(final float progress) {
final int MIN_WIDTH = 32;
int pixelWidth = (int) (MIN_WIDTH + (progressBarElement.getParent().getWidth() - MIN_WIDTH) * progress);
progressBarElement.setConstraintWidth(new SizeValue(pixelWidth + “px”));
progressBarElement.getParent().layoutElements();
}
public void showLoadingMenu() {
nifty.gotoScreen(“loadlevel”);
if (future == null) {
future = executor.submit(loadTrack);
} else if (future != null) {
if (future.isDone()) {
future = null;
} else if (future.isCancelled()) {
future = null;
}
}
}
private Callable<Void> loadTrack = new Callable<Void>() {
@Override
public Void call() throws Exception {
myApp.enqueue(new Callable<Void>() {
@Override
public Void call() throws Exception {
myApp.loadLevel(levelManager.getCurrentLevel());
nifty.gotoScreen(“end”);
return null;
}
});
return null;
}
};
}[/java]
heres the function which does the loading.
[java] public void loadLevel(int level) {
stateManager.attach(bulletAppState);
mainMenu.setProgress(0.1f);
soundManager.loadSoundEffects(new Sound[]{Sound.DEMO_SFX_2, Sound.DEMO_SFX_1});
mainMenu.setProgress(0.2f);
soundManager.loadMusic(new Sound[]{Sound.DEMOTRACK_1});
mainMenu.setProgress(0.4f);
levelManager.initialise(level);
mainMenu.setProgress(0.6f);
transformManager.initialise();
mainMenu.setProgress(1);
GameState.setGameState(GameState.RUNNING);
}[/java]
I have 2 problems with this:
1 - After i press “play”, the progress bar appears, but does nothing.
2 - The new thread I create never stops, it still runs even after i close the program.
I try to avoid multithreading at all costs, is it unavoidable here? and I am even using it right? Without using another thread i never see the progress bar appear, i just see the main menu freeze and then the game starts. Thanks for any info.
Ok i think I have solved it, using something i learned recently :P, adding it over a course of frames, also without threads woopy, for anyone interested.
[java] public class MainMenu implements ScreenController {
public Nifty nifty;
private TestingPhysicsCollisions myApp;
private Element progressBarElement;
private NiftyJmeDisplay niftyDisplay;
public MainMenu() {
myApp = TestingPhysicsCollisions.getApp();
niftyDisplay = new NiftyJmeDisplay(myApp.getAssetManager(),
myApp.getInputManager(),
myApp.getAudioRenderer(),
myApp.getGuiViewPort());
nifty = niftyDisplay.getNifty();
nifty.fromXml("Interface/hellojme.xml", "start", this);
myApp.getGuiViewPort().addProcessor(niftyDisplay);
}
@Override
public void bind(Nifty nifty, Screen screen) {
final Element element = null;
progressBarElement = nifty.getScreen("loadlevel").findElementByName("progressbar");
}
@Override
public void onStartScreen() { }
@Override
public void onEndScreen() { }
public boolean inputEvent(final NiftyInputEvent inputEvent) {
return false;
}
public void setProgress(final float progress) {
final int MIN_WIDTH = 32;
int pixelWidth = (int) (MIN_WIDTH + (progressBarElement.getParent().getWidth() - MIN_WIDTH) * progress);
progressBarElement.setConstraintWidth(new SizeValue(pixelWidth + "px"));
progressBarElement.getParent().layoutElements();
}
public Nifty getNifty() {
return nifty;
}
public void showLoadingMenu() {
nifty.gotoScreen("loadlevel");
myApp.loadLevel(levelManager.getCurrentLevel());
}
[/java]
In my main class
[java]
public void loadLevel(int level) {
load = true;
}
public void simpleUpdate(float tpf) {
if (load == true) {
if (frameCount == 1) {
AmbientLight ambient = new AmbientLight();
ambient.setColor(ColorRGBA.White);
rootNode.addLight(ambient);
} else if (frameCount == 2) {
stateManager.attach(bulletAppState);
mainMenu.setProgress(0.2f);
} else if (frameCount == 3) {
soundManager.loadSoundEffects(new Sound[]{Sound.DEMO_SFX_2, Sound.DEMO_SFX_1});
mainMenu.setProgress(0.3f);
} else if (frameCount == 4) {
soundManager.loadMusic(new Sound[]{Sound.DEMOTRACK_1});
mainMenu.setProgress(0.4f);
} else if (frameCount == 5) {
levelManager.initialise(level);
mainMenu.setProgress(0.6f);
} else if (frameCount == 6) {
transformManager.initialise();
GameState.setGameState(GameState.RUNNING);
mainMenu.setProgress(1f);
mainMenu.getNifty().gotoScreen("end");
}
frameCount++;
}[/java]
Brilliant. I was just going to work on it. 
Thanks a lot.
How about you write a “Hello Loading” tutorial 
It should be fun and easy for you.
i suppose i could write a testcase which loads a previous tutorial that takes some time to load, with some brief info, and then someone else (maybe zathura) can improve it to make it look hawt <3.
Yeh, that would be nice
fun? easy? i doubt that very much :D. Tbh all i did was follow the progress-bar tutorial on the nifty wiki, and load the level over many frames. Which is probably not even the proper way to do it, its just the only way i could get it to work properly, i tried appstates and multi-threading, but suck at both :D. But definitely doing stuff over many frames should be in the wiki, it’s a very useful thing to know for noobs like me who don’t understand how the graphics pipeline works.
hmm…I am also learning Nifty(the Java way). Had my one example posted there. And it was really fun. It doesn’t have to be gooood, just a head start for everyone out there…you know.
there you go, the worst entry in the wiki 
https://wiki.jmonkeyengine.org/legacy/doku.php/jme3:advanced:loading_screen
i also didn’t know how to get back to normal flycam from nifty (thats how much i suck)
I will try to update it, when i m done implement it one my game.
I added the multithreaded version to the wiki, didn’t test it though.
https://wiki.jmonkeyengine.org/legacy/doku.php/jme3:advanced:loading_screen
oh nice, well it works great :D, thx
i updated it a bit, adding some text underneath and changing the progress bar to red so people can see it.
i have a diffrent question:
@wezrule presented one way to do progressing of code:
[java]
public void simpleUpdate(float tpf) {
if (load == true) {
if (frameCount == 1) {
AmbientLight ambient = new AmbientLight();
ambient.setColor(ColorRGBA.White);
rootNode.addLight(ambient);
} else if (frameCount == 2) {
stateManager.attach(bulletAppState);
mainMenu.setProgress(0.2f);
} else if (frameCount == 3) {
soundManager.loadSoundEffects(new Sound[]{Sound.DEMO_SFX_2, Sound.DEMO_SFX_1});
mainMenu.setProgress(0.3f);
} else if (frameCount == 4) {
soundManager.loadMusic(new Sound[]{Sound.DEMOTRACK_1});
mainMenu.setProgress(0.4f);
} else if (frameCount == 5) {
levelManager.initialise(level);
mainMenu.setProgress(0.6f);
} else if (frameCount == 6) {
transformManager.initialise();
GameState.setGameState(GameState.RUNNING);
mainMenu.setProgress(1f);
mainMenu.getNifty().gotoScreen(“end”);
}
frameCount++;
}[/java]
Is there any class to do it automaticly? somethin like
[java]
class ProgressBar extends ProgressCode {
public void executeCode(){
AmbientLight ambient = new AmbientLight();
ambient.setColor(ColorRGBA.White);
rootNode.addLight(ambient);
stateManager.attach(bulletAppState);
mainMenu.setProgress(0.2f);
soundManager.loadSoundEffects(new Sound[]{Sound.DEMO_SFX_2, Sound.DEMO_SFX_1});
mainMenu.setProgress(0.3f);
soundManager.loadMusic(new Sound[]{Sound.DEMOTRACK_1});
mainMenu.setProgress(0.4f);
levelManager.initialise(level);
mainMenu.setProgress(0.6f);
transformManager.initialise();
GameState.setGameState(GameState.RUNNING);
mainMenu.setProgress(1f);
mainMenu.getNifty().gotoScreen(“end”);
}
public void executionProgress(float progress){
mainMenu.setProgress(progress);
}
}
ProgressBar progressBar = new ProgressBar;
public void simpleInit() {
progressBar.executeCode();
}
[/java]
is there?
if not and i would to create is there any way to check what line of code(or just compiled fragment) is executing and max data to execute in method?
ok, don’t had answer about it, but i created solution for Frame check execution here:
http://hub.jmonkeyengine.org/groups/user-code-projects/forum/topic/progressmanager-progressbar-facilitation/
your on quite a rampage today aren’t u 