Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Hi Popcorn Dave,

Two things:

First, the sample code adds a label for each timer event rather than updating the existing label. If you watch memory usage as the test runs, it climbs gradually at each timer event.

Assign the original label to a variable when it is created. Then in redraw_Timer, instead of AddLabel just update $label->Text. This was enough to get rid of the flicker on my system.

This also solves the problem with the extra characters, since it redraws the label text every time.

use strict; use Win32::GUI(); my $interval = 100; my $main = Win32::GUI::Window->new( -name => 'Main', -width => 150, -height => 100, -onTimer => \&redraw_Timer, ); $main->AddTimer( "redraw_Timer", $interval); # add the following line my $label = $main->AddLabel( -text => scalar localtime ); $main->Show(); Win32::GUI::Dialog(); sub Main_Terminate { -1; } sub redraw_Timer{ my $temp = localtime; # replace the following line # return $main->AddLabel(-text => $temp); $label->Text( $temp ); }

Second, there is a noflicker option to Win32::GUI::Window->new, which for some reason defaults to 0.


In reply to Re: Refreshing text without flicker with AddLabel using Win32::GUI by bmann
in thread Refreshing text without flicker with AddLabel using Win32::GUI by Popcorn Dave

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (5)
As of 2022-01-26 18:07 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    In 2022, my preferred method to securely store passwords is:












    Results (69 votes). Check out past polls.

    Notices?