; one-section.nsi
;
; This example demonstrates how to control section selection.
; It allows only one of the sections of a group to be selected.

;--------------------------------

; Section define/macro header file
; See this header file for more info

!include "Sections.nsh"

;--------------------------------

Name "One Section"
OutFile "one-section.exe"

;--------------------------------

; Pages

Page components

;--------------------------------

; Sections

Section !Required
  SectionIn RO
SectionEnd
SubSection asd

Section "Group 1 - Option 1" g1o1
SectionEnd

Section /o "Group 1 - Option 2" g1o2
SectionEnd

SubSectionEnd

;--------------------------------

; Functions

; $1 stores the status of group 1
; $2 stores the status of group 2

Function .onInit

  StrCpy $1 -1

FunctionEnd

Function .onSelChange

  !insertmacro SectionFlagIsSet ${g1o1} ${SF_SELECTED} "" next

    StrCmp $1 ${g1o2} "" dontUnselect

      !insertmacro UnselectSection ${g1o2}

dontUnselect:

  StrCpy $1 ${g1o1}

next:

  !insertmacro SectionFlagIsSet ${g1o2} ${SF_SELECTED} "" next2

    StrCmp $1 ${g1o1} "" dontUnselect2

      !insertmacro UnselectSection ${g1o1}

dontUnselect2:

  StrCpy $1 ${g1o2}

next2:

FunctionEnd