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Re: How to scroll MainWindow , consists of many frames

by choroba (Archbishop)
on Apr 30, 2020 at 11:56 UTC ( #11116272=note: print w/replies, xml ) Need Help??


in reply to How to scroll MainWindow , consists of many frames

I guess you're using Tk.

To add scrollbars, use the Tk::Scrolled. For example, you can create a top scrolled frame:

#!/usr/bin/perl use warnings; use strict; use Tk; my $mw = 'MainWindow'->new; my @array = map join('=', int rand 100), 1 .. 100; my $top = $mw->Scrolled('Frame', -scrollbars => 'e')->pack; my $x = 0; for my $pair (@array) { my ($name, $value) = split /=/, $pair; my $frame = $top->Frame->pack; my $label_index = $frame->Label(-text => $x, -width => 10, -relief => 'groove') ->pack(-side => 'left'); my $label_name = $frame->Label(-text => $name, -width => 30, -relief => 'groove') ->pack(-side => 'left'); my $label_value = $frame->Label(-text => $value, -width => 25, -relief => 'groove') ->pack(-side => 'left'); my $label_description = $frame->Entry(-text =>'description', -width => 30, -relief =>'groove') ->pack(-side=>'left'); ++$x; } MainLoop();

Note that my example is runable as is, while yours isn't (I had to guess the format of the array values, etc.) Also, adding a space here or there improves readability.

The first argument of split is a regex or a space. Also, I prefer single quotes for strings that don't interpolate anything, and no quotes for strings that only interpolate a single variable.

Update: The array is populated wrongly. See Lotus1's reply for a fix.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

Replies are listed 'Best First'.
Re^2: How to scroll MainWindow , consists of many frames
by Lotus1 (Vicar) on Apr 30, 2020 at 15:20 UTC

    I usually learn something from your code so I tend to read it carefully. I noticed that the join() inside the map() is only joining one item so there won't be a '='. When I run your example the third column is blank. The split /=/, $pair; section is only populating $name. I was able to fix it by placing a second int rand 100 inside the join().

    After a few more tweaks I ended up with this:

    #!/usr/bin/perl use warnings; use strict; use Tk; use Tk::Pane; my $mw = 'MainWindow'->new; my @array = map join('=', $_, int rand 100, int rand 100), 1 .. 100; my $top = $mw->Scrolled('Frame', -scrollbars => 'e')->pack; for my $pair (@array) { my ($x, $name, $value) = split /=/, $pair; print "pair=$pair, name=$name, value=$value\n"; my $frame = $top->Frame->pack; my $label_index = $frame->Label(-text => $x, -width => 10, -relief => 'groove') ->pack(-side => 'left'); my $label_name = $frame->Label(-text => $name, -width => 30, -relief => 'groove') ->pack(-side => 'left'); my $label_value = $frame->Label(-text => $value, -width => 25, -relief => 'groove') ->pack(-side => 'left'); my $label_description = $frame->Entry(-text =>'description', -width => 30, -relief =>'groove') ->pack(-side=>'left'); } MainLoop();
      Thanks for the fix, I originally had a map inside a map there and wanted to simplify it, but didn't check the results or copied a wrong phase of the change.

      map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

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