<Swing Dev> JDK-8178091 : Bug I will workin on

[Sergey Bylokhov]

Hi, Patrick.
Can you please run the code using these options:
-Dsun.java2d.xrender=true
-Dsun.java2d.xrender=false
-Dsun.java2d.opengl=true
-Dsun.java2d.opengl=false


> 
> After tests it seems that the problem doesn't come from Timer , but 
> the repaint() method , 
> 
> 
> even with this code the bug is here.
> the bug is on Linux.
> 
> 2017-04-11 11:07 GMT+02:00 Walter Laan <WLaan at costengineering.eu <mailto:WLaan at costengineering.eu>>:
> Note that the example code in JDK-8178091 sleeps on the EDT, so you’re lucky it paints at all instead of hanging the UI.
> 
>  
> 
> It looks like you adapted the code from http://codereview.stackexchange.com/questions/29630/simple-java-animation-with-swing <http://codereview.stackexchange.com/questions/29630/simple-java-animation-with-swing> where no-one experienced with Swing pointed out this error L.
> 
>  
> 
> Using a javax.swing.Timer (not the java.util.Timer!) and it runs okay (using Win10, Java 8u101):
> 
>  
> 
>     private void go() {
> 
>  
> 
>         new Timer(10, new ActionListener() {
> 
>             // Les coordonnées de départ de notre rond
> 
>             private int x = pan.getPosX(), y = pan.getPosY();
> 
>             // Le booléen pour savoir si l'on recule ou non sur l'axe x
> 
>             private boolean backX = false;
> 
>             // Le booléen pour savoir si l'on recule ou non sur l'axe y
> 
>             private boolean backY = false;
> 
>  
> 
>             @Override
> 
>             public void actionPerformed(ActionEvent e) {
> 
>                 // Si la coordonnée x est inférieure à 1, on avance
> 
>                 if(x < 1) {
> 
>                     backX = false;
> 
>                 }
> 
>                 // Si la coordonnée x est supérieure à la taille du Panneau moins la taille du rond, on recule
> 
>                 if(x > pan.getWidth() - 50) {
> 
>                     backX = true;
> 
>                 }
> 
>                 // Idem pour l'axe y
> 
>                 if(y < 1) {
> 
>                     backY = false;
> 
>                 }
> 
>                 if(y > pan.getHeight() - 50) {
> 
>                     backY = true;
> 
>                 }
> 
>  
> 
>                 // Si on avance, on incrémente la coordonnée
> 
>                 // backX est un booléen, donc !backX revient à écrire
> 
>                 // if (backX == false)
> 
>                 if(!backX) {
> 
>                     pan.setPosX(++x);
> 
>                 // Sinon, on décrémente
> 
>                 }
> 
>                 else {
> 
>                     pan.setPosX(--x);
> 
>                 }
> 
>                 // Idem pour l'axe Y
> 
>                 if(!backY) {
> 
>                     pan.setPosY(++y);
> 
>                 }
> 
>                 else {
> 
>                     pan.setPosY(--y);
> 
>                 }
> 
>  
> 
>                 // On redessine notre Panneau
> 
>                 pan.repaint();
> 
>             }
> 
>         }).start();
> 
>     }
> 
>  
> 
> Hope that helps,
> 
> Walter.
> 
>  
> 
> From: swing-dev [mailto:swing-dev-bounces at openjdk.java.net <mailto:swing-dev-bounces at openjdk.java.net>] On Behalf Of Patrick Chen
> Sent: maandag 10 april 2017 12:23
> To: swing-dev at openjdk.java.net <mailto:swing-dev at openjdk.java.net>
> Subject: Re: <Swing Dev> JDK-8178091 : Bug I will workin on
> 
>  
> 
> (edit : for example this game coded in java : https://github.com/cloudStrif/GoldenSunD <https://github.com/cloudStrif/GoldenSunD> will work with java 7
> 
> but clearly not with java8 (linux 64 bits) because of lags)
> 
>  
> 
> 2017-04-10 12:19 GMT+02:00 Patrick Chen <chen.j.patrick at gmail.com <mailto:chen.j.patrick at gmail.com>>:
> 
> Hi every one , 
> 
> just wanted to inform that I am working to fix this bug.
> 
>  
> 
> it is when we devellop animations thanks to repaint() method , 
> 
> for java 7 it works well 
> 
> but with java8 not , 
> 
> (linux 64 bits it doesn't really work ) 
> 
>  
> 
> so after watching the source code it seem that it is not a swing problem 
> 
> but AWT : Component.java .
> 
>  
> 
> thank you
> 
>  
> 
>  
> 
>  
> 
> 

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