bugDenemo - Bugs: bug #32284, FreezeDisplay (opposite of...


bug #32284: FreezeDisplay (opposite of RefreshDisplay)

Submitted by:  -Deleted Account- <steele>
Submitted on:  Sat 29 Jan 2011 12:26:43 AM UTC  
Category:  Feature request Severity:  3 - Normal
Item Group:  None Status:  In Progress
Privacy:  Public Assigned to:  None
Open/Closed:  Open

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Sat 29 Jan 2011 02:28:00 PM UTC, comment #2:

Hmm, I have just looked at the code and it does a whole pile of things other than just queuing a re-draw.
I noticed in other places (e.g. at every key stroke initiated command IIRC) it was being called with apparent casualness.
It would take some work to pare down the action of d-RefreshDisplay to what is essential. But it may be sufficient just to examine the state of the stage for undo, and make refresh display do nothing unless this is at zero.
I don't suggest we experiment with this before giving the current code a thorough testing.

Richard Shann <rshann>
Project Administrator
Sat 29 Jan 2011 02:16:27 PM UTC, comment #1:

This may not be an issue, as the re-draw calls are telescoped by gtk (possibly).

Richard Shann <rshann>
Project Administrator
Sat 29 Jan 2011 12:26:43 AM UTC, original submission:

With a growing number of scripts and commands we can't assume any longer that commands do not refresh the display unless told so.
What were once higher level scripts now became low-level commands and parts of even more sophisticated scripts.
And some built-ins do refresh the display on there own.

To the point: The bigger the script, the longer it takes, the more noticeable is the scripts processing, an unpleasant view for the user who don't know whats going on in the background.

We need the opposite of RefreshDisplay, a command that stops updating the display so we can deactivate updating on command-start and activate it again on command-end manually. (Maybe the re-activating could be put into RefreshDisplay).

-Deleted Account- <steele>


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