a message box after MUI_PAGE_DIRECTORY?

[JedBartlett]

Hi,

I have an install script that lets the user choose his install dir using this page:

!insertmacro MUI_PAGE_DIRECTORY

What I need to do is not allow them to select a directory that contains spaces (ex. "c:\program files\abc" is not allowed).

How can I add a function that looks for spaces in the INSTDIR and, if there are spaces, shows a message box and returns back to the MUI_PAGE_DIRECTORY page?

Any help is greatly appreciated!

Jed

[Afrow UK]

You can set up a Leave function like so:

!define MUI_PAGE_CUSTOMFUNCTION_LEAVE "checkInstDir"
!insertmacro MUI_PAGE_DIRECTORY

This is what you need:
http://nsis.sourceforge.net/archive/...ances=0,11,122

-Stu

[Jnuw]

JedBartlett,

Add this line right above your !insertmacro MUI_PAGE_DIRECTORY line:

!define MUI_PAGE_CUSTOMFUNCTION_LEAVE "DirectoryLeave"

Then add a function like this:

Function DirectoryLeave
<check $INSTDIR for spaces here, goto end if no spaces>
MessageBox MB_OK "$INSTDIR contains spaces, try again"
Abort
End:
FunctionEnd


This will allow the user to hit the next or install button, but will then run the DirectoryLeave function, and if your $INSTDIR contains spaces, will show the messagebox and loop them back to the MUI_PAGE_DIRECTORY page to allow them to fix their error.

As for the <check $INSTDIR for spaces here, goto end if no spaces>, I’m not sure how to check for spaces in a string ($INSTDIR), but someone will come along shortly and tell you that part. This should get you started, I’ll keep checking on that line.

[Jnuw]

How about this:

C.4 Search in a string
; StrStr
; input, top of stack = string to search for
; top of stack-1 = string to search in
; output, top of stack (replaces with the portion of the string remaining)
; modifies no other variables.
;
; Usage:
; Push "this is a long ass string"
; Push "ass"
; Call StrStr
; Pop $R0
; ($R0 at this point is "ass string")

Function StrStr
Exch $R1 ; st=haystack,old$R1, $R1=needle
Exch ; st=old$R1,haystack
Exch $R2 ; st=old$R1,old$R2, $R2=haystack
Push $R3
Push $R4
Push $R5
StrLen $R3 $R1
StrCpy $R4 0
; $R1=needle
; $R2=haystack
; $R3=len(needle)
; $R4=cnt
; $R5=tmp
loop:
StrCpy $R5 $R2 $R3 $R4
StrCmp $R5 $R1 done
StrCmp $R5 "" done
IntOp $R4 $R4 + 1
Goto loop
done:
StrCpy $R1 $R2 "" $R4
Pop $R5
Pop $R4
Pop $R3
Pop $R2
Exch $R1
FunctionEnd