Trying a custom handler for several math fields

[Vaughn Clement]

Hi Craig

Actually I am very determined to get to a mastery of LC. I understand it
takes time. BUT, after 35 plus years working with programming database apps
I find it odd that the old HyperCard I used 20 years ago has evolved but
not as well documented as was HyperCard of old. Oh yes I know HyperCard was
much smaller in scope then, but 30 years have passed since then. I have
used a large number of different database programs over the years and
judging LC against them I find LC fragmented as to the documentation.

The current database I use is FileMaker Advanced and it is so well
documented it is a gem to work with. By the way my expectations was to use
LC as a database substitute with IOS and Android. I have had to reassess my
goals based on the limits I have seen to date of LC.

Thank you

Vaughn Clement

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On Thu, Sep 12, 2013 at 8:42 PM, <dunbarx at aol.com> wrote:

> Vaughn.
>
>
> I keep hearing a certain tone in all your correspondence, that LC is
> flawed in much of its implementation, its documentation and its execution.
> It ain't so. It is, rather, a modern miracle of software, and transcends
> the programming paradigm common to virtually all other similar packages.
> Much of your frustration derives from simple newness.
>
>
> All of your issues are well within the capabilities of LiveCode, and,
> forgive me, at a novice/intermediate level.
>
>
> For example, as Stephen mentioned, strip out formatting characters before
> you do the math. No program ca directly perform calculations on a string
> such as "$45". Internally, the dollar sign (or comma) is stripped and then
> reapplied. In LC, this must be managed by you. The good news is that this
> process is easy and fun.
>
>
> Your query about card level functionality addresses what Jacque alluded
> to, that the message hierarchy is a fundamental, foundational cornerstone
> of the structure of the program. It just means to me that you are  still
> feeling your way forward. This is all to the good..
>
>
> So.
>
>
> I am gratified that you are doggedly and stubbornly moving forward, in
> spite of your frustration. You will quite soon get it. My wager stands.
>
>
> Craig Newman
>
>
> -----Original Message-----
> From: Vaughn Clement <vclement at gmail.com>
> To: How to use LiveCode <use-livecode at lists.runrev.com>
> Sent: Thu, Sep 12, 2013 10:18 pm
> Subject: Trying a custom handler for several math fields
>
>
> Hi All
>
> Since my scripts were lost on the update app killer I wanted to try out a
> custom handler:
>
> I wanted to try this out to see how it works for the first time. The
> original scripts (lost now) were using a field control to do the math
> between 3 to 4 fields. I used the suggested on closeField handler.
> It took some time but I had all of the fields doing the correct math.
>
> 1 Issue: on the card the different sets of field controls would only update
> within the set of fields in the script. If a user edited one of the fields
> that set would update. What I needed was to have all the fields update
> regardless of what set they below too.
> I assume that this can be done by passing the handler call up to the card
> level?
> My questions are as follow:
>
> 1. Can a custom handler work like "on doMath" and pass script to make it
> work from the card level?
> 2. The on doMath handler at the card level; can it include all of the
> different math scripts in that one handler so they all update at the same
> time from any field edited in the sets of fields needing updates.
> 3. Can I also include the field format command.
> 4. My consideration is that the fields were not updating as a complete
> group and that will confuse the user when they now need to re-enter the
> other fields to trigger the related changes from the other edits?
>
> Last concern: I was able to get the format to add the decimal places, but I
> needed to have the money symbol in the field also. When the typed in the
> field the math script won't run. The same thing happened when I used a
> comma for the divider of hundreds. So that kills the scripts. I did not
> find anything that tells you how to solve this? I tried the dictionary for
> answers but nothing was doing it!
>
> Thank you
>
> Vaughn Clement
>
> Apps by Vaughn Clement (Support)
> *http://www.appsbyvaughnclement.com/tools/home-page/*
> Skype: vaughn.clement
> https://secure.join.me/appsbyvclement
> FaceTime: vclement at gmail.com
> LogMeIn also avaialble
> Call on "ooVoo" at address:  vaughnclement or 9282549062
> Ph. 928-254-9062
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