PS v3 ISE: write-progress flickers annoyingly when multiple progress meters are used by johndog

Active

Type:	Bug
ID:	769310
Opened:	10/31/2012 8:08:08 AM
Access Restriction:	Public

Workaround(s)

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User(s) can reproduce this bug

Whenever write-progress starts a new progress bar, it redraws the entire set of progress bars. If this is done quickly, it causes an annoying flicker effect.

This is new behavior in the progress meter in V3.

Details (expand)

Always Happens

No, this is new to the most recent version

Run the following script in PS v3 ISE. Whenever the command {act1 3 "start 3"} is run, the entire set of three progress bars is redrawn.

$activity_string = "Some Activity"
$target = 1

function act1($id, $msg)
{
    write-progress -activity "$activity_string - $id" -percentcomplete 0 -id $id -status $msg
}

function act2($id, $msg, [int]$percent)
{
    write-progress -activity "$activity_string - $id" -percentcomplete $percent -id $id -status $msg
}

function act3($id)
{
    write-progress -activity "$activity_string - $id" -id $id -Completed
}

act1 1 "start 1"
act1 2 "start 2"
1..100 | % {
    #sleep -Milliseconds 1
    act2 2 "working" $_
    act1 3 "start 3"

    1..100 | % {
        #sleep -Milliseconds 1
        act2 3 "working" $_
        #"message"
    }

    act3 3
}

When {act1 3 "start 3"} executes, it should only draw a new progress bar for the third activity. The existing two progress bars should remain.

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