ClickItem challenge

[dunbarx]

Richmond.

I am sure you actually know this, but the clickChunk does indeed know what the "clickWord" is:

Code: Select all

answer char word 2 of the clickChunk to word 4 of the clickChunk of me

Craig

[dunbarx]

The challenge is to find, in a line in a field, which item of "xx,xx,xx,xx,xx,xx,xx" was clicked on.

My earlier optimistic assertion that the clickLoc might work may be in trouble. Not a problem with a fixed-width font like Courier. I can get the clickCharLoc, the formattedWidth of the line, and so know the pixel distance of that char from the left side of the field. In a fixed-width font, I can find the item that char lives in.

But not sure how to handle the far more common dynamic-width fonts. I do not want to have to know the pixel width of each char in such fonts, and am not even sure that would be viable in any case. I am trying to find a way forward using all the chunk gadgets, and location and size properties available in LC.

Hmmm. I may start a new challenge thread. My very first.

Craig

[dunbarx]

There is no "clickItem" function in LC.

This came from another thread:
http://forums.livecode.com/viewtopic.php?f=19&t=35159

The challenge is to find, in a line in a field, which item of "xx,xx,xx,xx,xx,xx,xx" was clicked on.

Not a problem with a fixed-width font like Courier. I can get the clickCharLoc, the formattedWidth of the line, and so know the pixel distance of that char from the left side of the field. In a fixed-width font, I can find the item that char lives in.

But not sure how to handle the far more common dynamic-width fonts. I do not want to have to know the pixel width of each char in such fonts, and am not even sure that would be viable in any case. I am trying to find a way forward using the chunk gadgets, and location and size properties available in LC.

Craig

[jmburnod]

Hi Craig,
If i understand you correctly, this should work

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on mouseup
   put word 2 of the clickchunk into tStart
   put 0 into tNbItems
   repeat with i = tStart down to 1
      if char i of fld 1 = "," then add 1 to tNbItems
   end repeat
   put tNbItems+1
end mouseup

Best
Jean-Marc

[richmond62]

I am sure you actually know this

Yes, I do, but it doesn't do a blind bit of good in the OP's case.

If I click on a word in a sentence in the line of a listField ALL I can get back is the line clicked.

So, knowing that is in this case as valuable as knowing that the moon is not made of cheese.

[FourthWorld]

Original thread posted in the "MacOS" forum (it's not platform-specific) has been merged with this duplicate thread here. Now people know where to post replies, and future readers can find complete discussions.

[jacque]

I am sure you actually know this

Yes, I do, but it doesn't do a blind bit of good in the OP's case.

If I click on a word in a sentence in the line of a listField ALL I can get back is the line clicked.

So, knowing that is in this case as valuable as knowing that the moon is not made of cheese.

The handler I posted finds the clicked item in a list field.

[richmond62]

Aksherlly, I can't help seeing this whole discussion as slightly redundant
as ALL one has to do is deselect the list behavior thing in the field's Prop. palette,
and 'Bingo' the whole thang disappears in a puff of smoke:

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on mouseDown
   put empty into fld "fREZ"
   put ((the clickLine) & " : ") into fld "fREZ"
   put the clickText after fld "fREZ"
end mouseDown

-

[jmburnod]

A better version of my first try

Code: Select all

on mouseup
   put word 2 of the clickchunk into tStart
   put word 2 of the clickline into tNoLi
   if tStart = empty then exit mouseup
   put 0 into tNbItems
   repeat with i = tStart down to 1
      if char i of fld 1 = cr then exit repeat
      if char i of fld 1 = "," then add 1 to tNbItems
   end repeat
   add 1 to tNbItems
   put "You clicked item" && tNbItems & "=" & item tNbItems of line tNoLi of fld "fText" into fld "fDev"
end mouseup

stGetClickedItem.zip

(1.3 KiB) Downloaded 230 times

Jean-Marc

[bn]

This works with locked fields and list fields

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on mouseUp
   put the clickCharChunk into tTemp
   if tTemp is empty then
      put "nothing clicked"
      beep
      exit mouseUp
   end if
   put word 2 of tTemp into tTemp
   put the number of lines of char 1 to tTemp of me into tLineNo
   put the number of chars of line 1 to tLineNo -1 of me into tPrevChars
   if tPrevChars > 0 then add 1 to tPrevChars -- add return at end of line
   put the number of items of char 1 to tTemp - tPrevChars of line tLineNo of me into tItemNo
   put "Item " &  tItemNo & " of line " & tLineNo
end mouseUp

Kind regards
Bernd

[dunbarx]

Thanks, Bernd.

You know, I got stuck in my thinking. I should have stepped back a bit and simply counted forward, collecting commas along the way, like you did.

Craig

[dunbarx]

So with blinders off, thanks to others, I think this finds, within a line, the item number in any kind of field, listField or not:

Code: Select all

on mouseUp
   put word 2 of the clickCharChunk into x
   put word 2 of the clickline into lineClickedOn
   put char 1 to word 2 of the clickCharChunk of me into tText
   put the number of chars of line 1 to (lineClickedOn - 1) of tText + 1 into upperCount
   answer the number of items of char 1 to  x - upperCount of the last line of tText
end mouseUp

A little analysis, or a kick from your buddies, is worth a million lines of code.

Craig

[Fermin]

Oh, how clueless I am!... Until now I didn't see that there was a second page of comments. The last post I saw, at the end of the first page was: [Post by dunbarx " Fri Dec 25, 2020 4:07 pm]
Thank you very much for all those answers. I have tried the latest code from Craig [Post by dunbarx "Mon Dec 28, 2020 12:14 am] and it seems to work very well. And I see that it basically relies on the 'clickline' and 'clickCharChunk' commands as I did in the code I uploaded in [Post by Fermin " Fri Dec 25, 2020 1:19 am]. But I'm going to investigate Craig's work because I find it more direct and professional.
Thank you, again... And you, 2021, please be good to us!

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