[Gambas-user] Creating a new form instance in code + and Case

[richard terry]

On Friday 02 September 2011 07:34:52 Benoît Minisini wrote:
> > Hi benoit.
> >
> > In the code tree one of my forms, for arguments sake, my work cover form
> > is called  FWorkCover (note the capitalisation)
> >
> >
> > I've a subroutine, pivotal to my clinical program where I add new
> > instances of forms onto my main workspace workspace, using this sort of
> > logic:
> >
> >
> > Public sub Add_Page(pagename as string)
> >
> >
> > 	Dim Form_Workcover as FWorkcover (note the C not capitalised as I'd
> > typed it wrongly)
> >
> > 	Select case pagename
> >
> > 	case "workcover"
> > 		  Form_Workcover = new FWorkcover (some_container)
> >
> > 	End select
> >
> > end
> >
> > ie when i did the original Dim Form_Workcover I'd typed Fworkcover (no
> > caps for the C in workcover,  instead of FWorkCover which is the name in
> > the code tree. This didn't seem to affect anything at all.
> >
> >
> > In another part of my program I had occasion to test which form was
> > active on the workspace tab, and, according to its name, activate or
> > inactivate buttons for new, print,preview etc like as follows. I'd
> > assumed, that as in the code tree the form was FWorkCover, that was the
> > name I'd be testing for (not realising that I'd not capped the 'C' of
> > FWorkcover in the other routine.
> >
> > For Each page In WorkspaceEditor.Windows
> >       If page = WorkspaceEditor.ActiveWindow Then
> >               For Each hctrl In page.VBoxEditor.Children
> >                  If hctrl Is Form Then
> >
> >                Select Case hctrl.Name
> > 			Case "FWorkCover"
> > 				'activate appropriate buttons etc
> >               End Select
> >
> > I kept on getting inconsistant results and when I checked it out, I
> > noticed that hctrl.name here was "FWorkcover"
> >
> > when i went back and corrected the original name, it was then FWorkCover
> > and worked.
> >
> > So the question is how come it is possible to create a new instance of a
> > form, when not using the exactly capitalised name fo the original form?
> >
> > Hope that makes sense
> >
> > Regards
> >
> > Richard
> 
> The first time a class name is encountered by the compiler specifies which
> name the class will have in the interpreter, and how the interpreter will
> memorize it.
> 
> And for Form objects, it implies the value of the Name property.
> 
> So the interpreter will take the name from the first loaded class that uses
> "FWorkCover" or any case variant. I guess this is "FWorkcover" in your
>  case. Then this name will be used during the entire life of the program.

Yes, but wouldn't it be better to enforce case on class names?

richard
> 
> Regards,
>