Drag and drop within a list field

Curry Kenworthy curry at pair.com
Fri Jul 16 15:01:55 EDT 2021


 > the data in the custom property look like:
 > code<tab>name1

That's backwards, try this:

And with a tab stop, you may not need a custom property!
Fields can hold more content than what meets the eye.

 > folder<tab>nameA

Do you really need "folder" and "code" spelled out?
Redundant content will limit performance/list size.

I would aim for either:




... where 1 and 2 etc are unique IDs and match a data array.
Way better than trying to mirror the content in a prop.

 > The user must keep moving the mouse around slightly
 > so that continual dragMove messages are sent

Messages are messages, ditto for commands, "never the twain."
Keep them separate, user a timer or an alternate message.
Messages are handy - not holy.

 > coding drag and drop operations in LC
 > is one of the areas I am least familiar with.

One of the most fun areas, really. Way back during college,
I remember using (probably HC?) to whip up a class schedule
drag-and-drop UI because I had transferred between U's
and had to fit just the right things in one semester.

The other students were doing this with pencil and paper.
It was a smooth stack, light-years ahead of its time.
My counselor was surprised at the classes I fit in.

And since then, LC drag and drop just gets more fun!
(Although, as I hinted one conference, we're moving beyond
that stage pretty soon in the history of app dev.)

Best wishes,

Curry Kenworthy

Custom Software Development
"Better Methods, Better Results"
LiveCode Training and Consulting

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