Drag List Items Up and Down

[FlexibleLearning.com]

This modification honours the minimum and maximum drag line to avoid the
inadvertent insertion of empty lines, and cosmetically works for both list
and standard fields...


-- Field script
on mouseDown
  put the num of lines of me into tmax # Store drag constraint
  put word 2 of the clickLine into tcl
  if not the listBehavior of me then set the textcolor of line tcl of me to
"red" # Cosmetic
  if line tcl of me is empty then
    exit mousedown
  end if
  put item 2 of the mouseLoc into tstarty
  put the effective textHeight of me into th
  repeat while the mouse is down
    if item 2 of the mouseLoc - tstarty > (th/2) then
      if within (me, the mouseLoc) is true then
        lock screen
        if tcl<tmax then # Constrain drag to max lines
          put cr & line tcl of me after line (tcl + 1) of me
          delete line tcl of me
          add 1 to tcl
          if not the listBehavior of me then set the textcolor of line tcl
of me to "red" # Cosmetic
          add th to tstarty
        end if
        if the listBehavior of me then set the hilitedLine of me to tcl #
Update hilitedline
        unlock screen
      end if
    else if tstarty - item 2 of the mouseLoc > (th/2) then
      if within (me, the mouseLoc) is true then
        lock screen
        put line tcl of me & cr before line (tcl - 1) of me
        delete line tcl + 1 of me
        subtract 1 from tcl
        if tcl<1 then put 1 into tcl # Constrain drag to min lines
        if not the listBehavior of me then set the textcolor of line tcl of
me to "red" # Cosmetic
        subtract th from tstarty
         if the listBehavior of me then set the hilitedLine of me to tcl #
Update hilitedline
        unlock screen
      end if
    end if
  end repeat
  if not the listBehavior of me then set the textcolor of line tcl of me to
empty # Cosmetic
end mouseDown

Hugh Senior
FLCo

> On Feb 2, 2017, at 11:48 AM, AndyP via use-livecode <use-
> livecode at lists.runrev.com<mailto:use-livecode at lists.runrev.com>> wrote:
> 
> Modified script
> added
> 
> /if within (field "myField", the mouseLoc) is true then /
> 
> on mouseDown
> 
>   put word 2 of the clickLine into tcl
>   set the textcolor of line tcl of me to "red"
>   if line tcl of me is empty then
>      exit mousedown
>   end if
>   put item 2 of the mouseLoc into tstarty
>   put the effective textHeight of me into th
>   repeat while the mouse is down
>      if item 2 of the mouseLoc - tstarty > (th/2) then
>         if within (field "myField", the mouseLoc) is true then
>            lock screen
>            put cr & line tcl of me after line tcl + 1 of me
>            delete line tcl of me
>            add 1 to tcl
>            set the textcolor of line tcl of me to "red"
>            add th to tstarty
>            unlock screen
>         end if
>      else if tstarty - item 2 of the mouseLoc > (th/2) then
>         if within (field "myField", the mouseLoc) is true then
>            lock screen
>            put line tcl of me & cr before line tcl - 1 of me
>            delete line tcl + 1 of me
>            subtract 1 from tcl
>            set the textcolor of line tcl of me to "red"
>            subtract th from tstarty
>            unlock screen
>         end if
>      end if
>         end repeat
>   set the textcolor of line tcl of me to "black"
>   set the hilitedLine of me to tcl
> 
> end mouseDown
> 
> 
> 
> -----
> Andy Piddock