Re: [perl-win32-gui-users] tutorials use strict? use warnings? globals? sender and eventargs? $self?
On 21/02/2008, David Christensen [EMAIL PROTECTED] wrote: perl-win32-gui-users: I'm a Win32::GUI newbie who went through the tutorials the other night: http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi?doc=tutorial and was shocked to see: 1. No use strict nor use warnings. If you look at the tutorial demo code distributed with Win32::GUI (run win32-gui-demos from a cmd prompt) you'll see that it is all strict and warnings safe. There is a line to be drawn somewhere with respect to clarity of the documentation and 'correctness'. We'll never satify everyone with the style used, and so I have tried to err on the side of keeping the task at hand clear. This is not supposed to be a tutorial in good perl coding style, but a tutorial showing the Win32::GUI concepts. Patches are always welcome if you think you can make things clearer. 2. The scripts used global variables to pass around references to the windows, controls, etc.. Again, this is one possible style. Possibly not a good one, but it makes it very clear what is being done. I didn't write the tutorials, but have inherited their maintainance based on the lack of anyone else willing to do it. Again, patches welcome. 3. There were no sender or eventargs arguments. Before this email I wasn't even aware what these things were. Remember this is Perl, not some MS language, so you shouldn't expect the idioms to be the same. There is more than enough support within Win32::GUI to provide an interface like this if you'd like to invest the time in creating all the necessary objects, but there will be a speed and memory hit from doing so (although it's probably not very significant). I think, more importantly, the procedural interface with the parameters decoded is more familiar to perl programmers. (Not even a $self arg?) RTFM, I don't see them either. You probably want to read about the differences between the OEM and NEM event models (although there's not much in the docs, the samples provide quite a lot of material, as does searching the list archives). Am I missing something? I was looking for an OO GUI toolkit in Perl. I intend to build an application that will feature pop-up forms for editing objects persisted in a database. My idea is to create a class and a table for each object type. The class includes a method to create and display a window for editing that type of object. When the user needs to create/ edit an object, I create an object, stuff it/ get it stuffed with data, and/or create/ display the editor window. The user may have many such windows open at the same time, including multiple windows from the same class. When the user interacts with the windows and controls, the event handlers need to be able to find the right object. Microsoft's sender argument solves this need nicely. Microsoft's eventargs argument solves other needs nicely. Does Win32::GUI have equivalents? Yes, it does. If the other replies have not helped you find the right direction, then please post back and we'll see what we can do to help you - there's nothing very hard if you're familiar with perl (and, in some cases, the Win32 API). Regards, Rob. TIA, David - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/ -- Please update your address book with my new email address: [EMAIL PROTECTED] - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/
Re: [perl-win32-gui-users] tutorials use strict? use warnings? globals? sender and eventargs? $self?
To do this have a look at the UserData method. It allows you to associate data to a window. When you use NEM events the first parm is the object that the event fired on. Say for example you have a button on a form, and you have many instances of that form your even handler would look like: My $self=shift; #the button object My $parent = $self-parent; #the parent window My $object = $parent-UserData; #the instance data for the window I guessed at a solution like that, but didn't see $self in the documentation for Button_Click(): http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi?doc=button Where is this documented? It should be documented in the NEM section. Win32::GUI supports two event modles OEM (old event model) and NEM (new event model). OEM is like visual basic, with the control name and the event name. So if a button was called hello and the button was clicked, the sub hello_Click would be called. OEM is only sutible for simple scripts With NEM you pass the reference of the sub that you want to run in response to an event (this makes NEM faster). To some exent a NEM event is like a method being called on that control and as such, the first parm being passed is the control. Does that help? Again no win32::GUI on this box. Cheers, jez --- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/ _ - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/
Re: [perl-win32-gui-users] tutorials use strict? use warnings? globals? sender and eventargs? $self?
jez_white wrote: Win32::GUI supports two event modles OEM (old event model) and NEM (new event model). OEM is like visual basic, with the control name and the event name. So if a button was called hello and the button was clicked, the sub hello_Click would be called. OEM is only sutible for simple scripts But, apparently, does not provide VB-like sender and eventargs arguments to the event handler (?). With NEM you pass the reference of the sub that you want to run in response to an event (this makes NEM faster). To some exent a NEM event is like a method being called on that control and as such, the first parm being passed is the control. It should be documented in the NEM section. Does that help? Again no win32::GUI on this box. Okay, thanks for the pointer. I was not aware of OEM and NEM: http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi?doc=reference-opt ions Thank you, David - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/
Re: [perl-win32-gui-users] tutorials use strict? use warnings? globals? sender and eventargs? $self?
Hi, Aquick reply. The tutorials are bad as they are really old. Have a look at the examples supplied as they are better formed. Yes you can wrap event handlers within an object so that each window knows its own state. This allows you to create and destroy many windows of the same object type dyamically. To do this have a look at the UserData method. It allows you to associate data to a window. When you use NEM events the first parm is the object that the event fired on. Say for example you have a button on a form, and you have many instances of that form your even handler would look like: My $self=shift; #the button object My $parent = $self-parent; #the parent window My $object = $parent-UserData; #the instance data for the window If you search the mailing list you should come across examples. I don't have perl installed on this box - but this reply should have enough content to get you started. Cheers, jez --Original Message- From: David Christensen [EMAIL PROTECTED] To: perl-win32-gui-users@lists.sourceforge.net perl-win32-gui-users@lists.sourceforge.net Sent: 21/02/08 05:30 Subject: [perl-win32-gui-users] tutorials use strict? use warnings? globals? sender and eventargs? $self? perl-win32-gui-users: I'm a Win32::GUI newbie who went through the tutorials the other night: http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi?doc=tutorial and was shocked to see: 1. No use strict nor use warnings. 2. The scripts used global variables to pass around references to the windows, controls, etc.. 3. There were no sender or eventargs arguments. (Not even a $self arg?) RTFM, I don't see them either. Am I missing something? I was looking for an OO GUI toolkit in Perl. I intend to build an application that will feature pop-up forms for editing objects persisted in a database. My idea is to create a class and a table for each object type. The class includes a method to create and display a window for editing that type of object. When the user needs to create/ edit an object, I create an object, stuff it/ get it stuffed with data, and/or create/ display the editor window. The user may have many such windows open at the same time, including multiple windows from the same class. When the user interacts with the windows and controls, the event handlers need to be able to find the right object. Microsoft's sender argument solves this need nicely. Microsoft's eventargs argument solves other needs nicely. Does Win32::GUI have equivalents? TIA, David - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/ - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/
Re: [perl-win32-gui-users] tutorials use strict? use warnings? globals? sender and eventargs? $self?
Glenn Linderman wrote: #3. I've read bunches of Windows API documentation, and have never found anything called sender, eventargs, or self. You must be reading stuff at some higher level of abstraction. http://search.cpan.org/~robertmay/Win32-GUI-1.06/docs/GUI/UserGuide/Read me.pod Win32::GUI is a Win32-platform native graphical user interface toolkit for perl. Basically, it's an XS implementation of most of the functions found in user32.dll and gdi32.dll, with an object oriented perl interface and an event-based dialog model that mimic the functionality of visual basic. I was expecting something like Visual Basic (although I prefer C#): http://msdn2.microsoft.com/en-us/library/system.windows.forms.control.cl ick(VS.71).aspx jez_whit wrote: To do this have a look at the UserData method. It allows you to associate data to a window. When you use NEM events the first parm is the object that the event fired on. Say for example you have a button on a form, and you have many instances of that form your even handler would look like: My $self=shift; #the button object My $parent = $self-parent; #the parent window My $object = $parent-UserData; #the instance data for the window I guessed at a solution like that, but didn't see $self in the documentation for Button_Click(): http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi?doc=button Where is this documented? David - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Perl-Win32-GUI-Users mailing list Perl-Win32-GUI-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users http://perl-win32-gui.sourceforge.net/
