pauljlucas
25th November 2009 19:34 UTC

Conditionally present Quick Launch checkbox
Since Quick Launch icons apparently aren't used in Windows 7, I want my installer not to present the user with the Quick Launch checkbox on the Components page if the user is running Windows 7.

First, to determine whether the user is running Windows 7, I have:

Function .onInit
  Var /GLOBAL WindowsVersion
  ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion" VersionNumber
  StrCpy $R1 $R0 3
  StrCmp $R1 '6.1' 0 +2
  StrCpy $WindowsVersion "7"
FunctionEnd

I'm using MUI2 and also have:

!define MUI_COMPONENTSPAGE_NODESC
!insertmacro MUI_PAGE_COMPONENTS

; ... [snip] ...

LangString LS_QuickLaunchIconSecName ${LANG_ENGLISH} \
           "Quick Launch icon"

; ... [snip] ...

Section "$(LS_QuickLaunchIconSecName)"
  CreateShortCut "$QUICKLAUNCH\${APP_NAME}.lnk" "$INSTDIR\${APP_NAME}.exe"
SectionEnd

However, it's not clear how to conditionally disable the Quick Launch checkbox (yet still leave the remaining components intact).

Also, as an aside, I wrote this stuff a while ago. In looking back, it's no longer clear to me how NSIS "knows" the above section is the section that specifies the Quick Launch checkbox. So, how does it "know?"

Thanks for any help.

Anders
25th November 2009 19:49 UTC

don't read the registry to find the windows version, use winver.nsh

to disable/uncheck a section, the section needs an id, specify the id like so: section "display name" myId

then, somewhere _after_ that section in the script, you need to use a function that is called at runtime (.oninit,.onguiinit or the pre callback for the components page) and disable the section if needed using the helper macros in sections.nsh

pauljlucas
25th November 2009 22:35 UTC

OK, I now have:

Section "$(LS_QuickLaunchIconSecName)" S_QuickLaunch
  CreateShortCut "$QUICKLAUNCH\${APP_NAME}.lnk" "$INSTDIR\${APP_NAME}.exe"
SectionEnd

; ... [snip] ...

Function .onInit
  ${If} ${IsWin7}
    UnselectSection S_QuickLaunch
  ${Endif}
FunctionEnd

When I run this on a machine running Windows 7, it still shows the Quick Launch checkbox. (Yes, I'm including the necessary files.)

Anders
25th November 2009 22:41 UTC

section "name" id
...
UnselectSection ${id}

also, to _hide_ the item, you need to set its name to an empty string

pauljlucas
25th November 2009 22:50 UTC

The:

  UnselectSection ${S_QuickLaunch}

by itself made no difference.

How do you set its name to an empty string?

Anders
25th November 2009 23:05 UTC

by reading about sections in the helpfile

pauljlucas
25th November 2009 23:10 UTC

I now have:

Function .onInit
  ${If} ${IsWin7}
    UnselectSection ${S_QuickLaunch}
    SectionSetText ${S_QuickLaunch} ""
  ${EndIf}
FunctionEnd

and there's still no change.

Anders
25th November 2009 23:28 UTC

!include WinVer.nsh
!include Sections.nsh
page components
page instfiles
Section foo bar
SectionEnd

Function .onInit
${If} 1 == 1 ;replace with OS test
  !insertmacro UnselectSection ${bar}
  SectionSetText ${bar} ""
${EndIf}
FunctionEnd

pauljlucas
25th November 2009 23:48 UTC

D'oh! I realized I wasn't editing the copy of the file that was being used to generate the installer, so of course the result was no different. :(

Anyway, it works now that I'm editing the correct file. Thanks for your patience.