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

[Patrick Chen]

OK ,
So I did severals tests with theses options with programms using full
repaint() method
,and it still work well,
but occasionnaly ,the lag is here again ,particularly when there are a lot
component on the screen (Jpanel screen)

indeed , I think it is not normal that we need theses options to work well ,
but it seem the problem does not come from Swing package , but repaint()
method in AWT package ,



2017-04-11 19:18 GMT+02:00 Sergey Bylokhov <sergey.bylokhov at oracle.com>:

>
> Hi ,
> yes ;
> with theses options it works !
> but what that means ?
>
>
> Is it works in case of any options or in some cases it does not work?
> Please double check.
>
>
> so it not a bug ?
>
> 2017-04-11 18:46 GMT+02:00 Sergey Bylokhov <sergey.bylokhov at oracle.com>:
>
>> 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>:
>>
>>> 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.stackexchang
>>> e.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] *On
>>> Behalf Of *Patrick Chen
>>> *Sent:* maandag 10 april 2017 12:23
>>> *To:* 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 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>:
>>>
>>> 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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