730640 - Scrolling a page with a running a java applet causes rendering issues with the applet

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[Mohamed Dabbagh]

Attachment: Screenshot

When scrolling a page that has a java applet running, rendering issues can be seen with the applet. The problem is fixable if you refresh the page. Using Chrome, rendering issues are seen but are immediately fixed/adjusted. In Firefox, the rendering issues remain. Please see screenshot.

Seen on Firefox 11b3 with Windows 7:
Build identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20100101 Firefox/11.0

Steps to Reproduce:
1. Launch Firefox
2. Go to http://www.ies.co.jp/math/java/comp/cplconj/cplconj.html -- Let the java applet to run
3. Scroll the page

Actual Results:
Rendering issues occur with the java applet.

Expected Results:
No rendering issues occur in the java applet or if issues occur that they are fixed.

Comment 1

[tecnotron]

Reproducible. Happens to me in Firefox 12 and previous versions. Google Chrome and Internet Explorer work better. I think that some applets may have rendering issues, but in Firefox I have this problem with almost all kinds of applets.

My description:
Artifacts appear on the screen when a web page with a Java Applet is scrolled up and down. 

Steps to Reproduce:
1. Launch Firefox
2. Go to http://docs.oracle.com/javase/tutorial/deployment/applet/deployingApplet.html
3. Observe the Dynamic Tree Demo applet
4. Scroll the page up and down 

Actual Results:
Rendering issues occur with the java applet.

Comment 2

[tecnotron]

Attachment: Applet rendering issue screenshot

Comment 3

[Dan Switzer]

Just wondering if this issue might ever be resolved. It would seem this could be fixed pretty easily by just redrawing the applet area.

I seem to recall we can work around the issue by hiding, then re-showing the applet after scrolling stops, but that's a painful workaround.

Comment 4

[marcino245]

A possible duplicate has been created - bug 1248125.

(You may also take a look at the current one's (730640) predecessor - bug 647137)

Comment 5

[marcino245]

On the webpage from comment 1 I have no issues, but I have issues on other webpages.

Comment 6

[marcino245]

Firefox Version 47.0a1 Build ID 20160218030349 + Intel Celeron G550 + Windows XP SP3 x86 + Intel HD GPU (6.14.10.5437) + 4GB RAM + Java(TM) Platform SE 8 U73 Next Generation Java Plug-in 11.73.2 for Mozilla browsers

Comment 7

[marcino245]

> but I have issues on other webpages.
On http://czat.wp.pl/i,30494,chat.html or http://www.coilgun.info/mark2/rlcsim.htm

Comment 8

[Kyle Machulis [:qdot] [:kmachulis] (INACTIVE)]

The HTML <applet> element and related java functionality was removed from Gecko in Bug 1279218. Marking related bugs as invalid.