[wxperl-users] Re: What people find confusing in wxWindows docs

[Michael N. <MN...@Ja...>]

----- Original Message -----
From: "Michael Nino" <MN...@Ja...>
To: <wxp...@li...>
Sent: Tuesday, April 23, 2002 8:14 AM
Subject: Re: wxperl-users digest, Vol 1 #147 - 4 msgs


> Hi,
>
> I am not a C/C++ programmer but a Perl programmer. Nothing against C/C++
of
> course I wish I had the time to learn it. I've read part of "GNU C++ for
> Linux" so I understand basically C/C++ syntax, prototypes, data
structures,
> etc... however IMHO at least one example is sorely needed for each class
> *or* at least 80% of them. The reason being is that as a Perl programmer
> trying to make the leap to GUI programming (vs. CGI/HTML) I need to get
> started quickly!
>
> I believe the examples that are included in wxPerl are not through enough.
> What I mean to say is that in addition to seeing the wxPerl an explanation
> of GUI programming in Perl terms would go along way to getting Perl
> programmers started quickly.
>
> I'm under contract really wanted (and still do!) to write a GUI
application
> that would run locally on the customers computer-- a content management
> system for their web site but I couldn't make the leap quickly enough so I
> am writing it in DHTML and Win32::OLE instead.  : (
>
> Mattia, if you wouldn't mind answering a lot of questions so I could pick
> your brain. I would definitely consider creating these numerous examples
and
> associated explanations. I love Perl and would enjoying championing the Wx
> library.
>
> Michael
>
> ----- Original Message -----
> From: <wxp...@li...>
> To: <wxp...@li...>
> Sent: Monday, April 22, 2002 7:15 PM
> Subject: wxperl-users digest, Vol 1 #147 - 4 msgs
>
>
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> >
> > Today's Topics:
> >
> >    1. RFI: What people find confusing in wxWindows docs? (Mattia Barbon)
> >    2. Re: Associating data with listctrl items (Mattia Barbon)
> >    3. Re: Associating data with listctrl items (Nick Johnston)
> >    4. default window colour (Dave Roe)
> >
> > --__--__--
> >
> > Message: 1
> > From: "Mattia Barbon" <mb...@ds...>
> > To: wxp...@li...
> > Date: Sun, 21 Apr 2002 22:47:05 +0200
> > Reply-to: mb...@ds...
> > Subject: [wxperl-users] RFI: What people find confusing in wxWindows
docs?
> >
> > Given that Perl programmers find wxWindows documentation
> > ( written for C++ ) confusing, I'd like to know what exactly
> > people think is confusing. Knowing that I may think some way
> > of improving the documentation ( no promises, though ).
> >
> > Thanks
> > Mattia
> >
> >
> >
> > --__--__--
> >
> > Message: 2
> > From: "Mattia Barbon" <mb...@ds...>
> > To: Nick Johnston <sk...@er...>
> > Date: Sun, 21 Apr 2002 22:47:05 +0200
> > Subject: Re: [wxperl-users] Associating data with listctrl items
> > Reply-to: mb...@ds...
> > CC: wxp...@li...
> >
> > You forgot platform & wxPerl version, so I won't give you the solution
;-p
> >
> > > I have got a wxPerl application that contains a Wx::TreeCtrl and a
> > > Wx::ListCtrl. Whenever a Wx::TreeCtrl item is activated, new items
> > > are inserted in the list control. The "items" are stored as
> > > data in the tree control.
> > >
> > > I am attempting to supply a hashref as data for each item in the
> > > list control. So, in my EVT_TREE_SEL_CHANGED callback function
> > > I have the following code:
> >
> > <snip>
> >
> > > Adding the actual *items* works fine (they display properly in the
> list).
> > > The only problem is that setting the item data simply *does not work*.
> > > Bizarrely, whenever I print out $id in the above function, it is
> > > *always* zero.
> > >
> > > Anyway in my EVT_LIST_ITEM_ACTIVATED callback function I have:
> > >
> > > my $file_details = $object->{list}->GetItemData($event->GetItem());
> > >
> > > but this causes a message box to appear saying:
> > >
> > > "Cannot retrieve information for list control item XXXXXXXX" (i.e. it
> > > includes the item number).
> > I see; this: the problem is that GetItemData takes the index of the item
> > $list->GetItemData( $ebent->GetIndex() ), or $event->GetData() works
fine
> >
> > > I think the problem is that there is no SetPlData etc. for listctrl
like
> > > there is for treectrl. The C++ documentation seems to show that
> > > a listctrl item can only have a 'long' associated with it.
> > Yes, you can use the long as an index in an array ( or in an hash )
> containing
> > the hashrefs, though.
> >
> > > How can I associate a hashref with each item in a listctrl and how I
> > > can access this hashref when the item is "activated"?
> > See above
> >
> > HTH
> > Mattia
> >
> >
> >
> > --__--__--
> >
> > Message: 3
> > Date: Mon, 22 Apr 2002 05:53:01 -0700 (PDT)
> > From: Nick Johnston <sk...@er...>
> > To: Mattia Barbon <mb...@ds...>
> > cc: <wxp...@li...>
> > Subject: Re: [wxperl-users] Associating data with listctrl items
> >
> > On Sun, 21 Apr 2002, Mattia Barbon wrote:
> >
> > > You forgot platform & wxPerl version, so I won't give you the solution
> ;-p
> > >
> >
> > Win32, ActivePerl 5.6.1 build 628, wxPerl 0.09 -- sorry for not
including
> > before.
> >
> > > I see; this: the problem is that GetItemData takes the index of the
item
> > > $list->GetItemData( $ebent->GetIndex() ), or $event->GetData() works
> fine
> > >
> > > Yes, you can use the long as an index in an array ( or in an hash )
> containing
> > > the hashrefs, though.
> > >
> >
> > Ok, so I should have a hash keyed on the long and then have the value
for
> > that key be a hashref?
> >
> > Could you provide some sample code, please? I would really appreciate
it.
> > I'm confused that the $id in my original code is always 0. I would
really
> > appreciate some sample code here.
> >
> > > > How can I associate a hashref with each item in a listctrl and how I
> > > > can access this hashref when the item is "activated"?
> > > See above
> > >
> >
> > I would appreciate it if you could produce a simple snippet of code to
> > illustrate this (inserting an item, storing its data in a global hash
> > keyed on the long and then retrieving).
> >
> > I'm still pretty new to Wx and finding it pretty difficult.
> >
> > - Nick
> >
> >
> >
> > --__--__--
> >
> > Message: 4
> > Date: Mon, 22 Apr 2002 11:17:28 -0700
> > From: Dave Roe <dav...@ma...>
> > To: wxPerl Users <wxp...@li...>
> > Subject: [wxperl-users] default window colour
> >
> > Win2K
> > Perl 5.6.1
> > wxWindows 2.2.9
> > wxPerl 0.10
> >
> > how do you determine the default window colour? the wxWindows docs point
> > at wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW) but
> > wxSystemSettings does not seem to be supported by wxPerl (although
> > wxSYS_COLOUR_WINDOW does have an entry in _Exp.pm)
> >
> > thanks,
> > /dave
> >
> >
> >
> >
> > --__--__--
> >
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