## Formatting Numeric Input

### Re: Formatting Numeric Input

Has anyone any idea how to rectify the previous post?

### Re: Formatting Numeric Input

I am not sure I am solving the actual problem but I made a small change to your function to handle -.123 it now returns -0.123

txt$=".123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

txt$="0.123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

txt$="-.123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

txt$="-0.123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

end

function num$(d$)

t = 0

for x=1 to len(d$)

a=asc(mid$(d$,x,1))

if a = 46 then t = t + 1

if (a = 46) and (t > 1) then a = 0

if a = 45 and x>1 then a = 0

if a = 46 and x = 1 then num$ = "0" + num$

'if a = 45 and mid$(num$,2,1) = "." then num$ = "-0" + num$

if a = 45 or a = 46 or a>47 and a<58 then num$=num$+chr$(a)

' chr$(46) = "."

next

a=asc(mid$(num$,1,1))

if a = 45 and mid$(num$,2,1) = "." then num$ = "-0" + mid$(num$,2) '******

end function

txt$=".123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

txt$="0.123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

txt$="-.123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

txt$="-0.123"

print txt$,len(txt$),num$(txt$),len(num$(txt$))

end

function num$(d$)

t = 0

for x=1 to len(d$)

a=asc(mid$(d$,x,1))

if a = 46 then t = t + 1

if (a = 46) and (t > 1) then a = 0

if a = 45 and x>1 then a = 0

if a = 46 and x = 1 then num$ = "0" + num$

'if a = 45 and mid$(num$,2,1) = "." then num$ = "-0" + num$

if a = 45 or a = 46 or a>47 and a<58 then num$=num$+chr$(a)

' chr$(46) = "."

next

a=asc(mid$(num$,1,1))

if a = 45 and mid$(num$,2,1) = "." then num$ = "-0" + mid$(num$,2) '******

end function

### Re: Formatting Numeric Input

I've not looked at this for some time, but decided to come back to it. Maybe I might get some inspiration.RNBW wrote: ↑Thu May 31, 2018 11:03 am We seem to have sorted out how to input numeric values into a single textbox with a validity check on each character as it is entered. So my next step is to enable this in a grid of textboxes. I had previously a solution that partially worked (it did not include entering a "0" before a decimal point at the beginning of a number and it truncated the number if you entered a second decimal point).

I used the code for the single textbox solution and it works with the exception of putting a "0" before the decimal point when it appears in a positive or negative number when the decimal point is at the beginning of the number. That statement is not quite correct. If you enter ".123" or "-.123", initially nothing happens. If you go back and edit the numbers by entering two invalid characters in the ".123" number and three invalid characters in the "-.123" number they change to the required "0.123" and "-0.123".

I can't see why it doesn't work in the first place nor why it does work with the adding of invalid characters.

Help please! The code is below:

Code: Select all

`'=============================================== ' FILENAME: NumericInputInAGrid_08.bas '=============================================== NoMainWin Row = 3: Col =4 Dim TB$(Row, Col) WindowWidth = 500 WindowHeight = 200 UpperLeftX=int((DisplayWidth-WindowWidth)/2) UpperLeftY=int((DisplayHeight-WindowHeight)/2) bWidth = 100: bHt = 30 'width & height of textboxes 'Sets up the grid of Textboxes TextboxColor$ = "white" print: print For i = 1 to Row For j = 1 to Col Stylebits #main.tb, _ES_RIGHT, _WS_BORDER, 0, 0 TextBox #main.tb, (bWidth)*j -100+20, (bHt)*i - 15, bWidth+1, bHt+1 TB$(i,j) = "#main.tb"; "_r";i;"c";j 'print TB$(i,j) ' prints out handles on main win if you REM nomainwin maphandle #main.tb, TB$(i,j) Next Next Open "untitled" For Window As #main #main, "Font Arial 11" #main "TrapClose Quit" While Hwnd(#main) Scan For i = 1 To Row For j = 1 to Col Call checkInput TB$(i,j) Next j Next i CallDLL #kernel32, "Sleep", 300 As long, _ ret As void Wend '--------------------------------------------------------------- ' Check the characters entered. '--------------------------------------------------------------- Sub checkInput controlName$ #controlName$ "!contents? txt$" initLen = Len(txt$) txt$ = num$(txt$) If Len(txt$) < initLen Then #controlName$ txt$ handle = Hwnd(#controlName$) pos = Len(txt$) CallDLL #user32, "SendMessageA", handle As long, _ _EM_SETSEL As long, _ pos As long, _ pos As long, _ result As void End If End Sub '------------------------ ' Close down the program '------------------------ Sub Quit handle$ Close #handle$ End End Sub 'Valid number check '------------------------------------------------------------- function num$(d$) t = 0 for x=1 to len(d$) a=asc(mid$(d$,x,1)) if a = 46 then t = t + 1 if (a = 46) and (t > 1) then a = 0 if a = 45 and x>1 then a = 0 if a = 46 and x = 1 then num$ = "0" + num$ if a = 45 and mid$(num$,2,1) = "." then num$ = "-0" + num$ if a = 45 or a = 46 or a>47 and a<58 then num$=num$+chr$(a) ' chr$(46) = "." next a=asc(mid$(num$,1,1)) if a = 45 and mid$(num$,2,1) = "." then num$ = "-0" + num$ end function`

Not a chance. I'm still beating my head up against a wall. It might be obvious, but I'm just not getting it. It works until I try to enter .123 or -.123. These entries will allow characters outside the range ".-1234567890" to be entered, whereas other entries such as 1.23 exclude these other characters.

The code for entry into a single textbox is shown below:

Code: Select all

```
'==============================================
' Numeric entry into a textbox.
' This permits the entry of numbers including
' "-" and ".". It also prevents more than one
' "-" and "." from being entered.
' Filename: NumericInputByChar_6
'----------------------------------------------
' Still to resolve: zeros after decimal
' point if it is the last character.
'==============================================
nomainwin
Stylebits #main.textbox, _ES_RIGHT, _WS_BORDER, 0, 0
textbox #main.textbox, 10, 50, 100, 25
WindowWidth = 350
WindowHeight = 150
open "Filtered Numeric Input" for window as #main
print #main, "Font Arial 12 Bold"
#main.textbox "!contents? txt$"
#main.textbox "!setfocus"
#main "trapclose [quit]"
[CheckInput]
timer 0
#main.textbox "!contents? txt$" 'text in textbox
oldtxt$ = txt$ ' make text the oldtext
txt$ = num$(txt$) ' gets new text from function num$(text$) which does the checking
if oldtxt$ <> txt$ then
#main.textbox txt$ ' if old text is not the same as the new text then use new text
handle = hWnd(#main.textbox) ' get the handle of the textbox
pos = len(txt$) ' position of character is the length of the current text
calldll #user32, "SendMessageA", _ ' call EM_SETSEL
handle as ulong, _
_EM_SETSEL as long, _
pos as long, _
pos as long, _
result as void
end if
timer 5, [CheckInput] ' short delay then last char is deleted if not 0-9, - or .
wait ' wait for event
' Function to check that character input is 0-9, - or .
function num$(d$)
t = 0
for i=1 to len(d$)
a=asc(mid$(d$,i,1))
if a = 46 then t = t + 1
if (a = 46) and (t > 1) then a = 0 'only DOT after FIRST is cleared
if a = 45 and i>1 then a = 0 'so really almost anything do, not just 8
if a = 46 and i = 1 then num$ = "0" + num$
if a = 45 or a = 46 or a>47 and a<58 then num$=num$+chr$(a)
next
a=asc(mid$(num$,1,1))
if a = 45 and mid$(num$,2,1) = "." then num$ = "-0" + num$
end function
[quit]
close #main ' close window
end
```

This works as it should.

I would really appreciate some help on this so I can move on to finish off some code.