[Gambas-user] Emulating wizard Back/Next navigation

Fri Dec 12 19:18:28 CET 2008

My idea was a little different, but I think I got it....

In my idea, I use a panel or workspace in FMain as a host for the other windows.

The navigation is always handled from FMain, and not from each child
window, which is what makes it complicated for me.
I had created a model that used the object[] for reverse navigation
and the logical forward sequence is defined by the child windows, and
partly from a pre-defined default path. I'm getting satisfactory
results, but I was trying to see if there was a better way to do it

On Fri, Dec 12, 2008 at 11:54 AM, nando <nando_f at ...951...> wrote:
> To remove the complicatedness of going from 2 to 4 or 5, skipping 3, you
> could implement it this way.
> Let's say you're in Form2 and when NEXT is pressed, it is determined that
> the next step is 5.  You should have two global vars (called 'FROM' and 'DEST')
> set FROM 2 and set DEST to 5. Then perform the code (in Form2) to next the next
>  form (FORM3) but it checks to see if it matches DEST. This case it doesn't.
> Form3 will run code for NEXT to Form4.  Each form performs the same
> type of operation.  Each form should have a local var to remember the FROM
> when the thread reaches there to know where to go BACK to.  In this case
> when in Form5, it would save locally that it came from 2. If Form5 needs to
> go BACK, it will use it's local copy of FROM to know to set DEST, then
> run the back code (to Form4, then Form3, then Form2).
> Everything works sequencially forwards and backwards and each form has similar
> tests and methods to perform doing it.
>
>
>
> ---------- Original Message -----------
> From: Dominique SIMONART <simonart.dominique at ...11...>
> To: mailing list for gambas users <gambas-user at lists.sourceforge.net>
> Sent: Fri, 12 Dec 2008 04:11:24 +0100
> Subject: Re: [Gambas-user] Emulating wizard Back/Next navigation
>
>> M0E Lnx a écrit :
>> > I just can't seem to completely wrap my mind around this one.
>> >
>> > It really doesn't matter if i return to the same state or not... as
>> > long as I return there.
>> >
>> > it gets complicated when for instance, you go in a sequence from 1, 2,
>> > 3 then you back up to 2... change something in 2 that now makes you
>> > skip 3 and jump to 4 or 5.
>> >
>> > On Thu, Dec 11, 2008 at 3:40 PM, Simonart Dominique
>> > <simonart.dominique at ...11...> wrote:
>> >
>> >> M0E Lnx a écrit :
>> >>
>> >>> Exactly.
>> >>>
>> >>> The forward navigation depends on the user input, so it could jump
>> >>> from Form1 to Form3 and then to Form2 ans do on...
>> >>>
>> >>> So if we leave a footprint in the array, I think it *should* be easy
>> >>> to reverse the process indeed sort of like an "undo" process.
>> >>>
>> >>> But I'm not sure exactly what the best way to do the reverse is...
>> >>> should I index the array? or try to find the current form in the array
>> >>> and then just use the current forms.index in the array - 1 ?
>> >>>
>> >>> I've been fidling with this for a while... and it works perfecly in my
>> >>> mind... but can't really make it work on the IDE :(
>> >>>
>> >>> On Thu, Dec 11, 2008 at 2:23 PM, Simonart Dominique
>> >>> <simonart.dominique at ...11...> wrote:
>> >>>
>> >>>> M0E Lnx a écrit :
>> >>>>
>> >>>>> I have to say, the array idea makes more sense to me, simply because
>> >>>>> otherwise, it'll be hard to tell the next and back buttons which sub
>> >>>>> to run.
>> >>>>>
>> >>>>> I have tried an array, but object array rather than string array.
>> >>>>>
>> >>>>> The idea is that every form that gets opened leaves a footprint in
>> >>>>> this object array
>> >>>>> for instance, the form's open() event would have something like this
>> >>>>>
>> >>>>> IF ArrNav.find(me) = -1 THEN ArrNav.Add(me)
>> >>>>>
>> >>>>> this makes reverse navigation possible by indexing the array or a
>> >>>>> similar method. However, I am not able to work out all the bugs
>> >>>>> resulting from this because it gets crazy when you try to move back,
>> >>>>> then forward... then back... ends up in a crash almost every time
>> >>>>>
>> >>>>> Can someone work out a sample I can use?
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> On Thu, Dec 11, 2008 at 6:20 PM, nando <nando_f at ...951...> wrote:
>> >>>>>
>> >>>>>> Perhaps the following ideas...
>> >>>>>> Every step in the wizard has an associated form for whatever it does for that step.
>> >>>>>> Every form has a SUB for 'backwards' and 'forwards so that
>> >>>>>> when NEXT is clicked, the forwards code runs, which is whatever
>> >>>>>> is required for moving to the next form (ie: perform work, verify info,
>> >>>>>> hide form, the activate 'next' form)
>> >>>>>> when BACK is clicked, the backwards code runs, which is whatever to
>> >>>>>> undo this step (if needed), hide form, activate 'back' form.
>> >>>>>> Each form knows how to go back one step, and go forward one step.
>> >>>>>> You would have to tell the Next and BAck buttons which forwards and backwards
>> >>>>>> sub to run...you could place in NEXT.tag and BACK.tag the form or info required
>> >>>>>> to properly run the correct code.  This would be modular so each form takes
>> >>>>>> care of things.
>> >>>>>> Or, the list of wizard steps could be in a global string array with the name
>> >>>>>> of the form and simply step through the index.
>> >>>>>> -Fernando
>> >>>>>>
>> >>>>>>
>> >>>>>> ---------- Original Message -----------
>> >>>>>> From: "M0E Lnx" <m0e.lnx at ...626...>
>> >>>>>> To: "mailing list for gambas users" <gambas-user at ...652...e.net>
>> >>>>>> Sent: Wed, 10 Dec 2008 20:39:45 +0000
>> >>>>>> Subject: [Gambas-user] Emulating wizard Back/Next navigation
>> >>>>>>
>> >>>>>>
>> >>>>>>> So I set myself to create a program that acts like a wizard, but chose
>> >>>>>>> not to use the wizard object because well, there is just too many
>> >>>>>>> variables here, and there is more than one way to get to the end,
>> >>>>>>> Depending on user input.
>> >>>>>>>
>> >>>>>>> So what I did was create a navigation tool bar at the bottom of FMain
>> >>>>>>> this toolbar has a BACK, EXIT, and a NEXT button.
>> >>>>>>>
>> >>>>>>> I have a workspace object above it which will host other forms via
>> >>>>>>> each forms .Reparent method.
>> >>>>>>>
>> >>>>>>> Can anyone suggest a way to make reverse and forward navigation on such a setup?
>> >>>>>>>
>> >>>>>>> I have created a small project what I'm trying to do... See attachment
>> >>>>>>>
>> >>>>>>> Any help is appreciated
>> >>>>>>>
>> >>>>>>> Thanks
>> >>>>>>>
>> >>>>>> ------- End of Original Message -------
>> >>>>>>
>> >>>>>>
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>> >>>>>
>> >>>>>
>> >>>> I think BACK has to be only an "undo" process, and NEXT is
>> >>>> the logical next state depending on the datas already
>> >>>> collected. If 2 forms could result from an actual status,
>> >>>> then you have to review the logical chain.
>> >>>>
>> >>>> my two cents :)
>> >>>> Dominique Simonart
>> >>>>
>> >>>>
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>> >>>>
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>> >>>
>> >>>
>> >> The simpler is often the better :) May be you could write
>> >> two procedures sort of PUSH and POP routines. Since the
>> >> datas to keep should be limited enough, the better is to
>> >> store all of them at each step with the last Object/form
>> >> name. Since all data are implicitly correct (they passed
>> >> correctly the preceeding step!) this is just a matter of
>> >> display the form and to restore all the variables with the
>> >> POPed values without control. This suppose of course the
>> >> BACK could only reverse step by step. If you add something
>> >> else in the BACK process, you could not be sure to return on
>> >> the same initial state.
>> >>
>> >> Dominique Simonart
>> >>
>> >>
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>> >>
>> >>
>> >
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>> >
>> >
>> >
>> Well, here is a very dirty tentative to show what could be done.
>> I don't really tested all the cases and it is surely not robust too!
>>
>> I take 5 forms, each of one with a checkbox to simulate different user
>> input and 3 buttons, Back, Next and Cancel
>> the chaining is not totally linear as I understand your wizard is
>> The "stack" is a Gridview (sort of static array bidimensional) wich I
>> display on the main form after all the steps
>> the first column is the tag of the active form, and the others give the
>> status of the 5 checkboxes
>>
>> hope this help
>> Dominique Simonart
> ------- End of Original Message -------
>
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