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There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1391712]

Tue, 01 July 2014 09:36

Shafiqul Alam

Messages: 2
Registered: July 2014

Junior Member

Recently I'm facing a problem when browsing a view content in Chrome Version 35.0.1916.153. In my application I've used ScrolledComposite. On this composite I've created some sections by using Section. My application supports single sourcing, I mean it runs on both RCP & RAP 2.2. In RCP, there is no problem. On the other hand, in RAP though contents are showing properly in FF, IE, Safari but in Chrome Version 35.0.1916.153 not. In Chrome for first time when scroll view comes it shows ok. When trying to scroll down or up some section doesn't move or some part scrolled with overlapping with other portion. Not whole page is scrolling.

I found it was not happening in earlier version of Chrome 35+. Though there was an another problem (Widgets disappearing in Google Chrome, Safari or Opera ) which was fixed by adding a javascript code. However, that code is removed for Chrome 35+ but this new scroll problem is occurred. Even I've tested in RAP 2.3 the scroll problem is still there. For better understanding please see the attachment.

Can any body help me how can I fix this problem or is it a known issue?

Attachment: example.png
(Size: 116.27KB, Downloaded 194 times)

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1391808 is a reply to message #1391712]

Tue, 01 July 2014 12:47

Eric Rizzo

Messages: 3070
Registered: July 2009

Senior Member

Moving this to the RAP forum.

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1392421 is a reply to message #1391808]

Wed, 02 July 2014 10:04

Sebastien Arod

Messages: 41
Registered: July 2009

Member

We have the same issue when the scrolled composite contains a Browser widget.

I reproduced the issue on chrome 35 and chrome 37.0.2062.3 dev (dev channel).

Disabling hardware acceleration does not help.

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1392436 is a reply to message #1392421]

Wed, 02 July 2014 10:35

Arnaud MERGEY

Messages: 243
Registered: March 2010
Location: France

Senior Member

Hello I confirm also this issue reproducible with rap demo

Go in http://rap.eclipsesource.com/demo/release/rapdemo/#gmaps, minimize your window in order to have vertical scrollbars and try to scroll verticall
It works fine in Firefox, but not in chrome

Arnaud

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1392444 is a reply to message #1392436]

Wed, 02 July 2014 10:47

Ivan Furnadjiev

Messages: 2426
Registered: July 2009
Location: Sofia, Bulgaria

Senior Member

Hi,
I can reproduce it on my machine with Chrome v35.0.1916.153. Reopened
the bug:
435200: Vertical scrolling broken in Chrome
https://bugs.eclipse.org/bugs/show_bug.cgi?id=435200
We will investigate it with a higher priority.
Best,
Ivan

--
Ivan Furnadjiev

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1393000 is a reply to message #1392444]

Thu, 03 July 2014 05:06

Shafiqul Alam

Messages: 2
Registered: July 2014

Junior Member

Thanks for your reply. However, I've a small figured out in a point when this problem is occurring. For creating set content composite of ScrolledComposite I'm using its style as SWT.DOUBLE_BUFFERED. If I use SWT.BORDER then Chrome 35+ scrolling fine. For any other style (SWT.NONE or SWT.DEFAULT etc.) Chrome 35+ can't scroll properly.

Example code that is not creating problem in Chrome 35+:

ScrolledComposite scrolledComposite = new ScrolledComposite(
parentComposite, SWT.H_SCROLL | SWT.V_SCROLL);
....
Composite contentComposite = new Composite(scrolledComposite , SWT.BORDER);//if use SWT.NONE or any other style then creating problem
scrolledComposite.setContent(contentComposite );

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1393840 is a reply to message #1392421]

Fri, 04 July 2014 10:52

Ivan Furnadjiev

Messages: 2426
Registered: July 2009
Location: Sofia, Bulgaria

Senior Member

Hi Sebastien, Arnaud,
what is the content of your Browser widget? Could you create a snippet
to demonstrate the issue with a similar content?
Best,
Ivan

--
Ivan Furnadjiev

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1395711 is a reply to message #1393840]

Mon, 07 July 2014 09:31

Arnaud MERGEY

Messages: 243
Registered: March 2010
Location: France

Senior Member

The content of browser widget is a google map, so same issue we have with demo

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1395740 is a reply to message #1395711]

Mon, 07 July 2014 10:21

David Song

Messages: 217
Registered: April 2011

Senior Member

I met the same problem too in my project

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1403835 is a reply to message #1395740]

Mon, 28 July 2014 08:21

Arnaud MERGEY

Messages: 243
Registered: March 2010
Location: France

Senior Member

Hello,

Do you have some ideas about what could cause this ? and are there anything we can do to help you investigate or solve this ?

Regards,
Arnaud

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Re: There is a scroll problem with the RAP 2.2/2.3 in Chrome 35+ [message #1403844 is a reply to message #1403835]

Mon, 28 July 2014 09:09

Ivan Furnadjiev

Messages: 2426
Registered: July 2009
Location: Sofia, Bulgaria

Senior Member

Hi Arnaud,
we believe that this is a WebKit bug. We opened a bugzilla against
WebKit [1] for the previous related issue (invisible elements - bug
428717), but there is no response till now. When only some elements in a
page are hardware accelerated (not the complete page), there are some
rendering glitches like the one with scrolling. Endorsing hardware
acceleration for the complete page [2] will fix the issue, but may lead
to other problems on some client PCs with older graphics adapters and
drivers.
Both WebKit problems have been introduced in Chrome version 33.

[1] https://bugs.webkit.org/show_bug.cgi?id=125070
[2]
https://wiki.eclipse.org/RAP/FAQ#Scrolling_looks_broken_in_Google_Chrome.2C_Safari_or_Opera
Best,
Ivan

--
Ivan Furnadjiev

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

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