!include "Sections.nsh"

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

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

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

; Pages

Page components
Page instfiles

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

; Sections

Section /o "Group 1 - Option 1" g1o1
SectionEnd

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

Section /o "Group 1 - Option 3" g1o3
SectionEnd

SectionGroup /e  "Group 2" g2

Section /o "Group 2 - Option 1" g2o1
SectionEnd

Section /o "Group 2 - Option 2" g2o2
SectionEnd

Section /o "Group 2 - Option 3" g2o3
SectionEnd
SectionGroupEnd
;--------------------------------

; Functions

; $1 stores the status of group 1


!macro GroupRO GroupId

  Push $0
  IntOp $0 ${SF_SECGRP} | ${SF_RO}
  IntOp $0 $0 | ${SF_EXPAND}
  SectionSetFlags ${GroupId} $0
  Pop $0

!macroend

Function .onInit

  StrCpy $1 ${g1o1} ; Group 1 - Option 1 is selected by default
  !insertmacro GroupRO ${g2}

FunctionEnd

Function .onSelChange

  !insertmacro StartRadioButtons $1
    !insertmacro RadioButton ${g1o1}
    !insertmacro RadioButton ${g1o2}
    !insertmacro RadioButton ${g1o3}
    !insertmacro RadioButton ${g2o1}
    !insertmacro RadioButton ${g2o2}
    !insertmacro RadioButton ${g2o3}
  !insertmacro EndRadioButtons
	
FunctionEnd