davidnewcomb
3rd August 2007 18:02 UTC

Contents of a Listbox
  I have trawled the forums and been unable to find an answer. There are loads of threads talking about Listboxes, but almost no documentation about manipulating them on the main site :(

I have been populating a ListBox and I want to read out what is in there. I have read through:

http://msdn2.microsoft.com/en-us/library/ms671394.aspx

which talks about listbox controls. It mentions getting selected indexes, counting how many items there are etc, but surprisingly there does not seem to be a "what is the text at index n" question.

I am stuck! Is there any (simpler) way?

Afrow UK
3rd August 2007 18:19 UTC

LB_GETTEXT!

Stu

davidnewcomb
3rd August 2007 18:50 UTC

I thought so, but it is not producing the response I expect:
I popuplate the list box

Then in <custom>Leave

!insertmacro MUI_INSTALLOPTIONS_READ $0 "ZoneConfiguration" "${CP_ZONE__LIST}" "HWND"

SendMessage $0 ${LB_GETTEXT} 0 $R0
MessageBox MB_OK "ListItems0->|$R0|"
SendMessage $0 ${LB_GETTEXT} 1 $R0
MessageBox MB_OK "ListItems1->|$R0|"
SendMessage $0 ${LB_GETTEXT} 2 $R0
MessageBox MB_OK "ListItems2->|$R0|"

The popup always displays the last entry in the list box!

How can I get all the entries in the list box irrespective of whether they are selected or not.

Red Wine
3rd August 2007 19:01 UTC

Selected items referred in State field.
Listed items referred in ListItems field.

Joel
3rd August 2007 19:33 UTC

Try this:

!insertmacro MUI_INSTALLOPTIONS_READ $0 "ZoneConfiguration" "${CP_ZONE__LIST}" "HWND"

>System::Call "user32::SendMessageA(i r0, i ${LB_GETCOUNT}, i 0, i 0) i .r1"

>StrCpy $2 0

>${Do}

>System::Call "user32::SendMessageA(i r0, i ${LB_GETTEXT}, i r2, t .r3) i .r1"

>MessageBox MB_OK "Item: $2 is $3"

>IntOp $2 $2 + 1

>${LoopUntil} $2 = $1

MessageBox MB_OK "Done!" 

davidnewcomb
6th August 2007 10:54 UTC

Red Wine: ListItems always returns empty
Joel: Thanks LB_GETCOUNT returns the size of the the Listbox and not the number of entries it contains.

I found that this worked better:

  StrCpy $2 0
  loop_start:
    System::Call "user32::SendMessageA(i r0, i ${LB_GETTEXT}, i r2, t .r3) i .r1"
;    MessageBox MB_OK "Item: $2 is $3"
    MessageBox MB_OK "Item: $2 is |$3|"
    StrCmp $3 "" realend
    !insertmacro WriteZoneInfo "${TMPDIR}\${TMP_ZONES_FILE}" $3
    IntOp $2 $2 + 1
  goto loop_start

  realend: