Using Inno Setup 5.5.2 I am trying to conditionally skip selection of the installation directory depending on the existence of a path. Specifically, if the 'D:\' drive is available I want installation to it in a predefined location with no prompts, and if it is not available, provide prompts with a reasonable default.
I have code that works for DefaultDirName
, but not for DisableDirPage
:
[Code]
const
DefaultDrive = 'D:\';
AppFolder = 'SomeDir';
function GetDefaultDir( Param: String ) : String;
begin
if DirExists( DefaultDrive ) then begin
Result := DefaultDrive + AppFolder;
end else begin
Result := ExpandConstant('{pf}\') + AppFolder;
end;
end;
function DefaultDirValid( Param: String ) : Boolean;
begin
Result := DirExists( DefaultDrive );
end;
[Setup]
; Works as expected
DefaultDirName={code:GetDefaultDir}
...
; Compiler Error - Value of [Setup] section directive "DisableDirPage" is invalid.
DisableDirPage={code:DefaultDirValid}
I have tried using functions for DisableDirPage
that return Strings of 'yes' and 'no', as well as Integers of 0 and 1. I have also tried inlining the call to DirExists
. All have produced the same compiler error.
My best guess is that it has something to do with the fact that DisableDirPage
takes a tri-state yes, no, or auto. Is there a specific type associated with the tri-state logic that needs to be returned? The Inno Help on Scripted Constants only says:
The called function must have 1 String parameter named Param, and must return a String or a Boolean value depending on where the constant is used.
ShouldSkipPage
event handler. – TLama