Warning message when unselecting option

Hi:

Here what i'd like to do:

On the components page, there is an option that whenever the user unselect it, i want to display a warning message warning the user about the importance of that package. So how can i do that?? i've been browsing around and i couln't find anything that let me check if a component has been unselected or not...

thanks.

!include Sections.nsh



Section "A section" SECID

SectionEnd



Function .onSelChange



SectionGetFlags ${SECID} $R0

IntOp $R0 $R0 & ${SF_SELECTED}

StrCmp $R0 ${SF_SELECTED} +2

 MessageBox MB_OK|MB_ICONEXCLAMATION "Unchecked #${SECID}!"



FunctionEnd

-Stu

Afrow UK, this code shows the message box whenever the section is not checked, even when checking/unchecking another section.

Sorry, fixed:

!include Sections.nsh



Section "A section" SECID

SectionEnd



Section "A sectioaan" SECIDa

SectionEnd



Var SectionVar



Function .onInit

 StrCpy $SectionVar ${SF_SELECTED}

FunctionEnd



Function .onSelChange



SectionGetFlags ${SECID} $R0

IntOp $R0 $R0 & ${SF_SELECTED}



StrCmp $R0 $SectionVar +4

StrCpy $SectionVar $R0



StrCmp $R0 ${SF_SELECTED} +2

 MessageBox MB_OK|MB_ICONEXCLAMATION "Unchecked #${SECID}!"



FunctionEnd

-Stu

try this script~~

!include "MUI.nsh"



Name "test"

OutFile "Setup.exe"



!insertmacro MUI_PAGE_COMPONENTS

!insertmacro MUI_PAGE_INSTFILES



!insertmacro MUI_LANGUAGE "english"



!insertmacro MUI_RESERVEFILE_INSTALLOPTIONS



Var cbState



Function .onInit

  IntFmt $cbState "%d" 1

FunctionEnd



Section "section a" SEC1

SectionEnd



Section "section b" SEC2

SectionEnd



Function .onSelChange

  Push $0

    SectionGetFlags SEC1 $0

    IntCmp $0 $cbState +4

      IntFmt $cbState "%d" $0

      IntCmp $0 1 +2

        MessageBox MB_OK|MB_ICONEXCLAMATION "SEC1 Unchecked"

  Pop $0

FunctionEnd

You cannot do that way. Sometimes, the SF_CHECKED flag has other flags with it, and that wouldn't work. An hexadecimal number allows setting flags without interferance from the existance of other flags. That's why the number returned by SectionGetFlags is an hexadecimal number.

????
SF_SELECTED = 1

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



; Generic section defines



!define SF_SELECTED   1              ; <<<----------  ******??

!define SF_SECGRP     2

!define SF_SUBSEC     2  # deprecated

!define SF_SECGRPEND  4

!define SF_SUBSECEND  4  # deprecated

!define SF_BOLD       8

!define SF_RO         16

!define SF_EXPAND     32

!define SF_PSELECTED  64  # internal

!define SF_TOGGLED    128 # internal

!define SF_NAMECHG    256 # internal



!define SECTION_OFF   0xFFFFFFFE



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

SF_SELECTED, whatever...

oh~ I see your point.

!include "MUI.nsh"

!include "Sections.nsh"



Name "test"

OutFile "Setup.exe"



!insertmacro MUI_PAGE_COMPONENTS

!insertmacro MUI_PAGE_INSTFILES



!insertmacro MUI_LANGUAGE "english"



!insertmacro MUI_RESERVEFILE_INSTALLOPTIONS



Var cbState



Function .onInit

  IntFmt $cbState "%x" ${SF_SELECTED}

FunctionEnd



Section "section a" SEC1

SectionEnd



Section "section b" SEC2

SectionEnd



Function .onSelChange

  Push $0

    SectionGetFlags SEC1 $0

    IntOp $0 $0 & ${SF_SELECTED}     # <<<<-------- add

    IntCmp $0 $cbState +4

      IntFmt $cbState "%d" $0

      IntCmp $0 ${SF_SELECTED} +2

        MessageBox MB_OK|MB_ICONEXCLAMATION "SEC1 Unchecked"

  Pop $0

FunctionEnd

Thanks to everyone who helped out with this, now i have one more question...could someone explain me the reason for all those "magic numbers" 2,4, etc etc, i dont know why you guys add sometimes 2 or 4...

thanks.

Those 4 and 2 are jumps.

For example:

IntCmp $0 $cbState +4

-- this line means that if the vars. you are comp. is same then goto line 4.(i.e. skip the next 3 lines.)

See the help file for relative jumps.

oh ok, I'm sorry if i sound dumb but..how do i make it so the message will be displayed when unselection the second section?? i tried changing sec1 for sec2, didnt work.

thanks.

Something else is wrong in resttools' code. This line is wrong:

SectionGetFlags SEC1 $0

and it should be:

SectionGetFlags ${SEC1} $0

Just use my code. I've tested it 😛

-Stu

Thanks it works!