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Bug 345012 - CCE thrown with the 'VNC Viewer' view
Summary: CCE thrown with the 'VNC Viewer' view
Status: RESOLVED WORKSFORME
Alias: None
Product: z_Archived
Classification: Eclipse Foundation
Component: Sequoyah (show other bugs)
Version: unspecified   Edit
Hardware: PC Windows All
: P3 major (vote)
Target Milestone: ---   Edit
Assignee: TmL Inbox CLA
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Keywords:
Depends on:
Blocks: 345008
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Reported: 2011-05-06 14:40 EDT by Remy Suen CLA
Modified: 2019-01-14 03:51 EST (History)
6 users (show)

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Description Remy Suen CLA 2011-05-06 14:40:54 EDT 
I believe this is because SWTRemoteDisplay arbitrarily sets its own layout to be the same as its parent's layout. In this case, the parent is a ScrolledComposite so its layout becomes a ScrolledCompositeLayout.

Each composite should decide what it wants to use to layout its children (if any) and not just randomly reuse the same layout (and same instance) as whatever its parent is using.

This problem pretty much makes Eclipse unusable because the CCE will keep happening whenever we need to layout the view.

java.lang.ClassCastException: org.eclipse.sequoyah.vnc.vncviewer.graphics.swt.img.SWTRemoteDisplayImg cannot be cast to org.eclipse.swt.custom.ScrolledComposite
	at org.eclipse.swt.custom.ScrolledCompositeLayout.layout(ScrolledCompositeLayout.java:50)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1263)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1249)
	at org.eclipse.swt.widgets.Composite.setLayoutDeferred(Composite.java:1086)
	at org.eclipse.swt.widgets.Display.runDeferredLayouts(Display.java:4187)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3745)
Comment 1 Daniel Drigo Pastore CLA 2011-09-08 15:35:53 EDT 
Hi Remy,

we investigated this issue, but could not reproduce it.
Could you please give us more information on how you are trying to use it?

Thanks,
Daniel Pastore
Comment 2 Remy Suen CLA 2011-09-08 16:03:21 EDT 
(In reply to comment #1)
> we investigated this issue, but could not reproduce it.

This problem will manifest itself if you use the 'VNC Viewer' view plug-in on Eclipse 4.x.
Comment 3 Daniel Drigo Pastore CLA 2011-09-09 09:01:00 EDT 
Hi Remy,

Well, our focus now would be for 3.7 SR1, so we can't address this bug right now.
As soon as we have some news for this, we'll announce it then.

Thanks for reporting this bug,

Daniel Pastore
Sequoyah Team
Comment 4 Eric Moffatt CLA 2012-01-30 14:57:54 EST 
Ping ! we're going into M6, is there any update on this ?
Comment 5 Remy Suen CLA 2012-03-02 16:17:02 EST 
Still getting this error with I20120229-2200 on Windows 7.

When I try to open the view, the 'Console' view also seems to automatically spawn although that view also seems to be broken in some way.
Comment 6 Mirko Raner CLA 2012-10-30 14:01:39 EDT 
I'm getting the exact same issue with Juno build 20120614-1722/Sequoyah 2.1.0.N20120718-0509.
All that is needed to reproduce this problem is attempting to connect to a VNC server.
Comment 7 Lars Vogel CLA 2019-01-14 03:51:16 EST 
Please reopen if this is still relevant