InnoSetup Dynamic ComboBox, check which item is selected and execute program - select

Question

In InnoSetup I want to disply a ComboBox on the Finished Page which shows the Components that were installed.
You can choose "None" or any of the installed Components and start the associated program when clicking on finish.
This is my code so far:
procedure CurPageChanged(CurPageID: Integer);
var
NewComboBox1: TNewComboBox;
begin
if (CurPageID = wpFinished) then begin
NewComboBox1 := TNewComboBox.Create(WizardForm);
with NewComboBox1 do begin
Parent := WizardForm.FinishedPage;
Left := ScaleX(256);
Top := ScaleY(208);
Width := ScaleX(145);
Height := ScaleY(21);
ItemIndex := 0;
Style := csDropDownList;
Items.Add('None');
if IsComponentSelected('1') then
Items.Add('Component 1');
if IsComponentSelected('2') then
Items.Add('Component 2');
if IsComponentSelected('3') then
Items.Add('Component 3');
end;
end;
end;
First I want to set "None" as automatically selected. when the page is shown. I have looked up many Pascal forums but none of the solutions worked, like NewComboBox1.ItemSelected=0 (or similar, don't remember correctly...). So how do I achieve this?
Then I don't know how to make a program start when clicking on Finish. I thought
function NextButtonClick
might help but then no Next button worked in the setup.
Maybe there is also a problem because the list is created depending on which Components were selected, so item 1 is not Component 1, if Component 1 was not selected but Component 2 for instance.
I thought one might solve this by making the items invisible instead of not creating them at all.
I looked in the Support Classes Reference in the IS help file but didn't find anything that would help me.
I am looking forward to your answers!

Answer 1

There's no simple way to do this due to a lack of missing access to the file name and destination directory which the component is binded to. Even TSetupComponentEntry internal record doesn't contain this information, but even if would, you won't be able to access it. So, the following script uses its own separate array which contains the component/file linkage needed for this task:
[Setup]
AppName=My Program
AppVersion=1.5
DefaultDirName={pf}\My Program
[Components]
Name: "program_32"; Description: "Program 32-bit"
Name: "program_x64"; Description: "Program 64-bit"
Name: "program_ia64"; Description: "Program IA 64-bit"
[Files]
Source: "MyProg.exe"; DestDir: "{app}"; Components: program_32
Source: "MyProg-x64.exe"; DestDir: "{app}"; Components: program_x64
Source: "MyProg-IA64.exe"; DestDir: "{app}"; Components: program_ia64
[Code]
type
TFileData = record
Component: string;
Description: string;
FileName: string;
Parameters: string;
end;
var
ComponentCombo: TNewComboBox;
ComponentArray: array of TFileData;
SelectionArray: array of TFileData;
procedure InitializeWizard;
begin
// this is a weakness of this solution - you need to fill the array
// of components that can be added to the final combo box when they
// are selected on component selection page. This is needed because
// you can't get neither file name nor destination directory of the
// file for the component from script. As first, set how many items
// you want to add to your component array storage
SetArrayLength(ComponentArray, 2);
// the Component member must match to the "Name" parameter from the
// [Components] section item since it's used in IsComponentSelected
// function call
ComponentArray[0].Component := 'program_32';
// the Description member is the text displayed in the combo item
ComponentArray[0].Description := 'Program 32-bit';
// the FileName member is the name of the file including path. This
// member may contain InnoSetup constants
ComponentArray[0].FileName := '{app}/MyProg.exe';
// the Parameters member contains execution parameters
ComponentArray[0].Parameters := '-a';
// this is the second item that can be added to the combo box, note
// that the program_ia64 component is not added to this array, what
// means, that it cannot be added to the "run" combo box. It's such
// kind of a filter for components like help files etc.
ComponentArray[1].Component := 'program_x64';
ComponentArray[1].Description := 'Program 64-bit';
ComponentArray[1].FileName := '{app}/MyProg-x64.exe';
ComponentArray[1].Parameters := '-b';
end;
procedure CurPageChanged(CurPageID: Integer);
var
I: Integer;
begin
if (CurPageID = wpFinished) then
begin
ComponentCombo := TNewComboBox.Create(WizardForm);
ComponentCombo.Parent := WizardForm.FinishedPage;
ComponentCombo.Left := ScaleX(256);
ComponentCombo.Top := ScaleY(208);
ComponentCombo.Width := ScaleX(145);
ComponentCombo.Height := ScaleY(21);
ComponentCombo.Style := csDropDownList;
ComponentCombo.Items.Add('None');
for I := 0 to GetArrayLength(ComponentArray) - 1 do
if IsComponentSelected(ComponentArray[I].Component) then
begin
ComponentCombo.Items.Add(ComponentArray[I].Description);
SetArrayLength(SelectionArray, GetArrayLength(SelectionArray) + 1);
SelectionArray[High(SelectionArray)] := ComponentArray[I];
end;
ComponentCombo.ItemIndex := 0;
end;
end;
function NextButtonClick(CurPageID: Integer): Boolean;
var
FileData: TFileData;
ResultCode: Integer;
begin
Result := True;
if (CurPageID = wpFinished) and (ComponentCombo.ItemIndex > 0) then
begin
FileData := SelectionArray[ComponentCombo.ItemIndex - 1];
Exec(ExpandConstant(FileData.FileName), FileData.Parameters, '', SW_SHOW,
ewNoWait, ResultCode);
end;
end;