4 Replies Latest reply: Nov 2, 2013 12:49 PM by Noel Carboni

Display flickers when going back in history using a script

yannick1976 Nov 2, 2013 11:02 AM

Hello all ! I noticed that the display flickers when going back in history using a script (I'm using Javascript), like so :

var docRef = app.activeDocument;

docRef.activeHistoryState = docRef.historyStates[docRef.historyStates.length-2];

What precisely happens is the document briefly turns to a checker (the same checker that indicates transparency).

It also happens when using "executeAction" with the action recorded by the ScriptListener.

But, it only happens when the function is called from within a script, not when I'm using the history panel.

This is a problem because it makes it a lot harder to see what changed between the two history states.

Any hint on what is happening / how to get around this ?

I'm using CS6.

Thanks in advance,

Yannick

1. Re: Display flickers when going back in history using a script

Noel Carboni Nov 2, 2013 12:09 PM (in response to yannick1976)

Windows 8? What video card?

If Windows, check for an updated display driver at the site of the maker of your video card. Make sure to reboot after installing one, even if not prompted.

Also, with WIndows 8 Microsoft bears some responsibility for flickering. Try changing the Drawing Mode setting in your Performance preferences, Advanced Settings... Make sure to close and restart Photoshop after settings changes there.

Good luck.

-Noel
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2. Re: Display flickers when going back in history using a script

Noel Carboni Nov 2, 2013 12:10 PM (in response to yannick1976)

P.S., does it stay checkered, or is it just a transient condition while running the script? Automation may leave the screen in indeterminate states while running, but usually it settles down and shows the right thing when a script or action finishes.

-Noel
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3. Re: Display flickers when going back in history using a script

yannick1976 Nov 2, 2013 12:42 PM (in response to Noel Carboni)

Hello ! Thanks for taking the time to answer.
Regarding your questions :
- I'm using windows 7 64 bits
- The checkered screen is a transient state
I really doubt it is a driver problem. The checkered screen is very photoshop-like (it doesn't look like hardware flicker at all). Besides, i'm not using graphics processor (performance options).
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4. Re: Display flickers when going back in history using a script

Noel Carboni Nov 2, 2013 12:49 PM (in response to yannick1976)

Chances are it's just a normal behavior when Photoshop is running some kind of automation then. I see it sometimes when running long actions.

That doesn't say you shouldn't ask for it to be less visually disruptive.

It might be a good thing to ask for over on the Photoshop family "feature request" site:

http://feedback.photoshop.com/photoshop_family

It seems odd that there are so many different places to talk about Photoshop, but I do know the Photoshop engineering peoiple pay a lot of attention to requests made over there.

-Noel
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Display flickers when going back in history using a script

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