TK Listbox: scrolling with keys/mousewheel

Ratazong has asked for the wisdom of the Perl Monks concerning the following question:

Dear monks

I'm struggeling with creating a scrolled listbox in Tk: the code below works, however I'm not able to scroll with the arrow-keys nor with the mouse-wheel. Do I have to bind the events myself and code the related actions? Or am I just missing something?

Thanks for your help! rata

sub selectProjectDialog_newtest
{
    $mw    = shift;                        # store the main window
    my @project_choices =  split(" ","Project1 Project2 Project3 Proje
+ct4 Project11 Project12 Project13 Project14 ") ;

    my $projectSelection_tl= $mw->Toplevel( ); 
    $projectSelection_tl->title("Select the project:");
    $projectSelection_tl->Label(-text    => 'Select the project Id:', 
+  )->grid(-row =>   5, -column =>  10, -sticky => "w");
    
    my $scrolled1 = $projectSelection_tl->Scrolled
                            ("Listbox", -scrollbars => "se", 
                                        -width => 50, 
                                        -height => 4,
                                        -selectmode => "extended")
                            ->grid(-row => 10, -column => 10, -columns
+pan => 10, -rowspan => 10); 
    $scrolled1->insert ("end", @project_choices);

}
[download]

Comment on TK Listbox: scrolling with keys/mousewheel Download Code

Replies are listed 'Best First'.
Re: TK Listbox: scrolling with keys/mousewheel by Anonymous Monk on Aug 04, 2020 at 09:00 UTC
Tk scroll mouse	[reply]
Re^2: TK Listbox: scrolling with keys/mousewheel by Ratazong (Monsignor) on Aug 04, 2020 at 09:59 UTC
Thanks! That set me on the right track! A mixture between 1186926 and the `sub wheel_browse` from 1186662 works for me Rata sub selectProjectDialog_newtest { $mw = shift; # store the main window my @project_choices = split(" ","Project1 Project2 Project3 Proje +ct4 Project11 Project12 Project13 Project14 ") ; my $projectSelection_tl= $mw->Toplevel( ); $projectSelection_tl->title("Select the project:"); $projectSelection_tl->Label(-text => 'Select the project Id:', + )->grid(-row => 5, -column => 10, -sticky => "w"); my $scrolled1 = $projectSelection_tl->Scrolled ("Listbox", -scrollbars => "se", -width => 50, -height => 4, -selectmode => "extended") ->grid(-row => 10, -column => 10, -columns +pan => 10, -rowspan => 10); $scrolled1->insert ("end", @project_choices); $scrolled1->Subwidget('listbox')->bind('<Enter>', sub{$scrolled1-> +Subwidget('listbox')->focus()}); $scrolled1->Subwidget('listbox')->bind('<MouseWheel>',[ \&wheel_br +owse, $scrolled1, Tk::Ev('D')]); } [download]	[reply] [d/l] [select]


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