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Re^2: How to get a window's menu as a Win32::GUI::Menu object?

by shadrack (Initiate)
on Feb 17, 2013 at 08:33 UTC ( #1019118=note: print w/ replies, xml ) Need Help??


in reply to Re: How to get a window's menu as a Win32::GUI::Menu object?
in thread How to get a window's menu as a Win32::GUI::Menu object?

Perhaps I've misunderstood you, but it appears blessing the handle just gives me a new (empty) menu. This does me no good as far as I can see. I'm trying to disable an item in an EXISTING menu -- the one attached to the main window.

sub Main { my $Menu Win32::GUI::MakeMenu( '&Program' => 'Program', ' > &Settings' => { -name => 'Settings', -onClick => \&GU +I_Settings }, ' > &About' => { -name => 'About', -onClick => \&About +_Click }, ' > &Update' => { -name => 'Update', -onClick => \&Upda +te_Now }, ' > E&xit' => { -name => 'Exit', -onClick => \&Main_T +erminate } ); my $WinMain = Win32::GUI::Window->new( -name => 'Main', -menu => $Menu, ... ); ... } sub Update_Now { my($Window)=@_; # Disable the 'Update' menu item }
As far as the functional interface goes, can you be more specific? I've read the tutorial several times. If there's something in there that helps me solve my problem, I'm not making the connection. Would you be so kind as to point it out?


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Re^3: How to get a window's menu as a Win32::GUI::Menu object?
by Anonymous Monk on Feb 17, 2013 at 09:04 UTC

    Perhaps I've misunderstood you, but it appears blessing the handle just gives me a new (empty) menu.

    I don't think so, blessing a hash doesn't create a handle (windows does that), it just gives you an object you can call methods on

    OTOH, the code you have posted includes no bless anywhere :)

    As far as the functional interface goes, can you be more specific?

    You know, I could, or you could just read the link I posted :)

    If you want anything more specific than that, you're going to have to post code that compiles and runs -- I'm not really interested in writing complete examples from scratch for non-portable-unmaintained-toolkits , its not fun for me :)

    Also, where are you getting your information from?

    See Win32/OLE related tutorials/examples/resources , they discuss many win32 things, how the MFC/win32-GUI system works (its all handles underneath, a handle is just a number)

      I don't think so, blessing a hash doesn't create a handle (windows does that), it just gives you an object you can call methods on

      Which is why I don't understand why it's relevant. How does it help my solve the problem?

      OTOH, the code you have posted includes no bless anywhere :)

      Fair enough:

      #!perl use Win32::GUI; &Main(); exit 0; sub Main { my $Menu = Win32::GUI::MakeMenu( '&Program' => 'Program', ' > &Alpha' => { -name => 'Alpha', -onClick => \&Alpha_Select +}, ' > &Beta' => { -name => 'Beta', -onClick => \&Beta_Select }, ); my $WinMain = Win32::GUI::Window->new( -name => 'Main', -menu => $Menu, -text => 'Menu Test', -width => 300, -height => 200, -onTerminate => \&Main_Terminate, ); $WinMain->Show(); Win32::GUI::Dialog(); } sub Main_Terminate { -1; } sub Alpha_Select { 1; } sub Beta_Select { my($Window)=@_; my $menuhandle=$Window->GetMenu(); my $menu = bless { -handle => $menuhandle }, 'Win32::GUI::Menu'; $menu->{'Beta'}->Enabled(0); # Doesn't work. return 1; }
      You know, I could, or you could just read the link I posted :)

      You posted a link to the tutorial. As I explained, I've already read the tutorial. I read it AGAIN after you posted the link, and yet AGAIN just now. I've read it three times in the last hour and still -- I don't see anything that's relevant to the problem, so again, can you please point out specifically what it is in the tutorial that's going to help me solve my problem?

      Also, where are you getting your information from?

      http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi

      http://www.mail-archive.com/perl-win32-gui-users@lists.sourceforge.net/msg00945.html

        Fair enough: CODE

        Employing Basic debugging checklist I get

        ( bless({ -handle => 28640341, Alpha => bless({ -id => 102, -menu => 41813267 }, "Win32::GUI::M +enuItem"), Beta => bless({ -id => 103, -menu => 41813267 }, "Win32::GUI::M +enuItem"), Program => bless({ -handle => 41813267 }, "Win32::GUI::MenuButton" +), }, "Win32::GUI::Menu"), bless({ # tied Win32::GUI::Window -accel => 0, -handle => 7734092, -name => "Main", -type => 0, }, "Win32::GUI::Window"), ) bless({ -handle => 13304919 }, "Win32::GUI::Menu")

        so what you want to do is skip GetMenu and either use global variables , or store $Menu inside $WinMain

        Like this

        #!/usr/bin/perl -- #!perl use Win32::GUI; use Data::Dump; Main( @ARGV ); exit 0; sub Main { my $Menu = Win32::GUI::MakeMenu( '&Program' => 'Program', ' > &Alpha' => { -name => 'Alpha', -onClick => \&Alpha_Select +}, ' > &Beta' => { -name => 'Beta', -onClick => \&Beta_Select }, ); my $WinMain = Win32::GUI::Window->new( -name => 'Main', -menu => $Menu, -text => 'Menu Test', -width => 300, -height => 200, -onTerminate => \&Main_Terminate, ); $WinMain->Show(); $WinMain->{__special_Menu} = $Menu; dd $Menu, $WinMain; Win32::GUI::Dialog(); delete $WinMain->{__special_Menu}; # "DESTROY"/destructor/manual m +emory cycle break } sub Main_Terminate { -1; } sub Alpha_Select { 1; } sub Beta_Select { my($Window)=@_; my $menuhandle=$Window->GetMenu(); my $menu = bless { -handle => $menuhandle }, 'Win32::GUI::Menu'; dd $menu; #~ $menu->{'Beta'}->Enabled(0); # Doesn't work. $Window->{__special_Menu}->{'Beta'}->Enabled(0); return 1; }

        Useful regarding memory management, Tutorials: Variable Scoping in Perl: the basics, Coping with Scoping , Mini-Tutorial: Perl's Memory Management, Lexical scoping like a fox, Read this if you want to cut your development time in half!

        I'll be back with more:) maybe

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