Handle Variables

[davidk64]

   dim buttonLabels$(6,6)

   for row = 0 to 5

       for col = 0 to 5

           buttonLabels$(row, col) = " "

           buttonHandleName$ = "#cell." + str$(row) + str$(col)

           cellPosX = 5 + col * 20

           cellPosY = 5 + row * 20

           button #buttonHandleName$, " ", handleCellClick, UL, cellPosX, cellPosY

       next col

   next row

   WindowWidth = 500 : WindowHeight = 500

   open "Testing button click" for window_nf as #cell

   wait



   sub handleCellClick buttonhandle$

       notice buttonhandle$

   end sub



   wait

   close #cell

   end


In the HTML help on "Handle Variables" in the "GUI Programming" section it seems to imply I can create buttons dynamically? But when I run the code I don't get any buttons. I'm wondering if the use of the handle variable is only for manipulating statically declared buttons? I admit the samples don't show dynamic creation of buttons ... I was just hoping!






[tsh73]

Hello David
Yes you cannot dynamically create buttons.

By manipulated things what were declared statically you can get pretty far
like for example
justbasiccom.proboards.com/thread/763/magic-square
(and bunch of other letter games/color balls variety games)

but having dynamically creation possible would be handy indeed.

[davidk64]

Thanks for the unwelcome answer

So thinking about it there is no compiler error because the code is valid albeit flawed with regard to intent. I define a button with the same handle "#buttonHandleName$" over and over just changing the x/y offsets each time. Then when the window is opened there is no button associated with it because "#cell" doesn't link to "#buttonHandleName$".

Wondering whether "#buttonHandleName$" is a valid #handle name though. Help says it must be alphanumeric and this has "$" character in it?

Also interesting that you can dynamically open multiple windows by "create handles dynamically on the fly" as described in the MAPHANDLE help topic!