In GRAB control

Tom Glod tom at makeshyft.com
Sun Oct 15 13:04:01 EDT 2017


richmond, are you asking a question or giving us code snippet to use?

On Sun, Oct 15, 2017 at 1:01 PM, Richmond Mathewson via use-livecode <
use-livecode at lists.runrev.com> wrote:

> Imagine a stack with a picture of an orange in its centre . . .
>
> The picture: img "arancia", contains the following script:
>
> on mouseDown
>       grab me
> end mouseDown
>
> so the end-user can move the picture wherever they want
> all over the stack.
>
> HOWEVER . . . I want to know whether their initial movement is to the
> left, right, upwards or downwards.
>
> Fantasy time again [pseudocode]:
>
> on Grab
>     put the left of me into LEFT1
>     put the top of me into TOP1
>     wait 2 ticks
> put the left of me into LEFT2
>     put the top of me into TOP2
>      if LEFT2 < LEFT1 then
>         put "LEFT"
>      else
>         put "RIGHT"
>      end if
>      if TOP2 < TOP1 then
>          put "UP"
>      else
>          put "DOWN"
>      end if
> end Grab
>
> Richmond.
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>



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