# This example demonstrates how to control section selection.
# It allows only one of the four optional section to be
# selected at any given time.

#### Uncomment the next line for an example with subsections too
# !define USE_SUBSECTION
####

Name example
OutFile one-section.exe

ComponentText "please choose just one but the default"

Var seca
Var secb
Var secc
Var secd

# defines SF_*, SECTION_OFF and some macros
!include Sections.nsh

Section !Required
	SectionIn RO
SectionEnd

!ifdef USE_SUBSECTION
	SubSection /e "choose one a" subseca
!endif

Section "optional #1" sec1a
SectionEnd

Section /o "optional #2" sec2a
SectionEnd

Section /o "optional #3" sec3a
SectionEnd

Section /o "optional #4" sec4a
SectionEnd

!ifdef USE_SUBSECTION
	SubSectionEnd
!endif

Section !Required
	SectionIn RO
SectionEnd

!ifdef USE_SUBSECTION
	SubSection /e "choose one b" subsecb
!endif

Section "optional #1" sec1b
SectionEnd

Section /o "optional #2" sec2b
SectionEnd

Section /o "optional #3" sec3b
SectionEnd

Section /o "optional #4" sec4b
SectionEnd

!ifdef USE_SUBSECTION
	SubSectionEnd
!endif

Section !Required
	SectionIn RO
SectionEnd

!ifdef USE_SUBSECTION
	SubSection /e "choose one c" subsecc
!endif

Section "optional #1" sec1c
SectionEnd

Section /o "optional #2" sec2c
SectionEnd

Section /o "optional #3" sec3c
SectionEnd

Section /o "optional #4" sec4c
SectionEnd

!ifdef USE_SUBSECTION
	SubSectionEnd
!endif

Section !Required
	SectionIn RO
SectionEnd

!ifdef USE_SUBSECTION
	SubSection /e "choose one d" subsecd
!endif

Section "optional #1" sec1d
SectionEnd

Section /o "optional #2" sec2d
SectionEnd

Section /o "optional #3" sec3d
SectionEnd

Section /o "optional #4" sec4d
SectionEnd

!ifdef USE_SUBSECTION
	SubSectionEnd
!endif

Function .onInit
	StrCpy $seca ${sec1a} ; Gotta remember which section we are at now...
	StrCpy $secb ${sec1b}
	StrCpy $secc ${sec1c}
	StrCpy $secd ${sec1d}
FunctionEnd

Function .onSelChange
	Push $0

!ifdef USE_SUBSECTION
; Check if the user have selected all of the sections using the sub-section
	SectionGetFlags ${subseca} $0
	IntOp $0 $0 & ${SF_SELECTED}
	StrCmp $0 0 skipa
		SectionSetFlags ${sec1a} 0
		SectionSetFlags ${sec2a} 0
		SectionSetFlags ${sec3a} 0
		SectionSetFlags ${sec4a} 0
	skipa:

	SectionGetFlags ${subsecb} $0
	IntOp $0 $0 & ${SF_SELECTED}
	StrCmp $0 0 skipb
		SectionSetFlags ${sec1b} 0
		SectionSetFlags ${sec2b} 0
		SectionSetFlags ${sec3b} 0
		SectionSetFlags ${sec4b} 0
	skipb:

	SectionGetFlags ${subsecc} $0
	IntOp $0 $0 & ${SF_SELECTED}
	StrCmp $0 0 skipc
		SectionSetFlags ${sec1c} 0
		SectionSetFlags ${sec2c} 0
		SectionSetFlags ${sec3c} 0
		SectionSetFlags ${sec4c} 0
	skipc:

	SectionGetFlags ${subsecd} $0
	IntOp $0 $0 & ${SF_SELECTED}
	StrCmp $0 0 skipd
		SectionSetFlags ${sec1d} 0
		SectionSetFlags ${sec2d} 0
		SectionSetFlags ${sec3d} 0
		SectionSetFlags ${sec4d} 0
	skipd:

!endif

	; Turn off old selected section
	SectionGetFlags $seca $0
	IntOp $0 $0 & ${SECTION_OFF}
	SectionSetFlags $seca $0
	# !insertmacro UnselectSection $seca

	; Now remember the current selection
	Push $2
	StrCpy $2 $seca

	SectionGetFlags ${sec1a} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $seca ${sec1a}
	SectionGetFlags ${sec2a} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $seca ${sec2a}
	SectionGetFlags ${sec3a} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $seca ${sec3a}
	SectionGetFlags ${sec4a} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $seca ${sec4a}

	StrCmp $2 $seca 0 +4 ; selection hasn't changed
		SectionGetFlags $seca $0
		IntOp $0 $0 | ${SF_SELECTED}
		SectionSetFlags $seca $0
		# !insertmacro SelectSection $seca

	; Turn off old selected section
	SectionGetFlags $secb $0
	IntOp $0 $0 & ${SECTION_OFF}
	SectionSetFlags $secb $0
	# !insertmacro UnselectSection $secb

	; Now remember the current selection
	Push $2
	StrCpy $2 $secb

	SectionGetFlags ${sec1b} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secb ${sec1b}
	SectionGetFlags ${sec2b} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secb ${sec2b}
	SectionGetFlags ${sec3b} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secb ${sec3b}
	SectionGetFlags ${sec4b} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secb ${sec4b}

	StrCmp $2 $secb 0 +4 ; selection hasn't changed
		SectionGetFlags $secb $0
		IntOp $0 $0 | ${SF_SELECTED}
		SectionSetFlags $secb $0
		# !insertmacro SelectSection $secb

	; Turn off old selected section
	SectionGetFlags $secc $0
	IntOp $0 $0 & ${SECTION_OFF}
	SectionSetFlags $secc $0
	# !insertmacro UnselectSection $secc

	; Now remember the current selection
	Push $2
	StrCpy $2 $secc

	SectionGetFlags ${sec1c} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secc ${sec1c}
	SectionGetFlags ${sec2c} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secc ${sec2c}
	SectionGetFlags ${sec3c} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secc ${sec3c}
	SectionGetFlags ${sec4c} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secc ${sec4c}

	StrCmp $2 $secc 0 +4 ; selection hasn't changed
		SectionGetFlags $secc $0
		IntOp $0 $0 | ${SF_SELECTED}
		SectionSetFlags $secc $0
		# !insertmacro SelectSection $secc

	; Turn off old selected section
	SectionGetFlags $secd $0
	IntOp $0 $0 & ${SECTION_OFF}
	SectionSetFlags $secd $0
	# !insertmacro UnselectSection $secd

	; Now remember the current selection
	Push $2
	StrCpy $2 $secd

	SectionGetFlags ${sec1d} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secd ${sec1d}
	SectionGetFlags ${sec2d} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secd ${sec2d}
	SectionGetFlags ${sec3d} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secd ${sec3d}
	SectionGetFlags ${sec4d} $0
	IntOp $0 $0 & ${SF_SELECTED}
	IntCmp $0 ${SF_SELECTED} 0 +2 +2
		StrCpy $secd ${sec4d}

	StrCmp $2 $secd 0 +4 ; selection hasn't changed
		SectionGetFlags $secd $0
		IntOp $0 $0 | ${SF_SELECTED}
		SectionSetFlags $secd $0
		# !insertmacro SelectSection $secd
	Pop $2
	Pop $0
FunctionEnd