Display an image when a task is selected

Question

I want the tasks display a different image when one of them is checked.

For example, if I have three different tasks:

Task 1: Standard version
Task 2: Lite version
Task 3: Pro version

• when Task 1 is checked must display an image.
• when Task 2 is checked must hide Task 1 image and display Task 2 image.
• When Task 3 is checked must hide others below tasks image and show Task 3 image.

Here some code

[Code]
{ RedesignWizardFormBegin } { Don't remove this line! }
{ Don't modify this section. It is generated automatically. }
var
  BitmapImage1: TBitmapImage;

procedure RedesignWizardForm;
begin
  { BitmapImage1 }
  BitmapImage1 := TBitmapImage.Create(WizardForm);
  with BitmapImage1 do
  begin
    Parent := WizardForm.SelectTasksPage;
    Left := ScaleX(320);
    Top := ScaleY(88);
    Width := ScaleX(57);
    Height := ScaleY(57);
    ExtractTemporaryFile('WizardForm.BitmapImage1.bmp');
    Bitmap.LoadFromFile(ExpandConstant('{tmp}\WizardForm.BitmapImage1.bmp'));
  end;

  with WizardForm.TasksList do
  begin
    Width := ScaleX(257);
    Height := ScaleY(200);
    Visible := False;
  end;
end;

Answer 1

• Use WizardIsTaskSelected (IsTaskSelected in older versions of Inno Setup) to find out what tasks have been selected.
• Handle WizardForm.TasksList.OnClickCheck and CurPageChanged to detect selection change and update image accordingly.

[Files]
Source: "lite.bmp"; Flags: dontcopy
Source: "pro.bmp"; Flags: dontcopy
Source: "std.bmp"; Flags: dontcopy

[Tasks]
Name: std; Description: "Standard version"; Flags: exclusive
Name: lite; Description: "Lite version"; Flags: exclusive
Name: pro; Description: "Pro version"; Flags: exclusive

[Code]
var
  BitmapImage1: TBitmapImage;

procedure UpdateTasksImage;
var
  Image: string;
begin
  if WizardIsTaskSelected('pro') then Image := 'pro.bmp'
    else
  if WizardIsTaskSelected('lite') then Image := 'lite.bmp'
    else
  if WizardIsTaskSelected('std') then Image := 'std.bmp'
    else Image := '';

  if Image <> '' then
  begin
    ExtractTemporaryFile(Image); 
    BitmapImage1.Bitmap.LoadFromFile(ExpandConstant('{tmp}\' + Image));
    BitmapImage1.Visible := True;
  end
    else
  begin
    BitmapImage1.Visible := False;
  end;
end;

procedure TasksListClickCheck(Sender: TObject);
begin
  { Update image, when task selection changes }
  UpdateTasksImage;
end;

procedure CurPageChanged(CurPageID: Integer);
begin
  { Update image, when task page is entered }
  { (as tasks can be selected by changing setup type or components) }
  if CurPageID = wpSelectTasks then
  begin
    UpdateTasksImage;
  end;
end;

procedure InitializeWizard;
begin
  BitmapImage1 := TBitmapImage.Create(WizardForm);
  with BitmapImage1 do
  begin
    Parent := WizardForm.SelectTasksPage;
    Left := ScaleX(320);
    Top := ScaleY(88);
    Width := ScaleX(57);
    Height := ScaleY(57);
  end;

  with WizardForm.TasksList do
  begin
    Width := ScaleX(257);
    Height := ScaleY(200);
  end;

  WizardForm.TasksList.OnClickCheck := @TasksListClickCheck
end;

---

Though it seems to me, that your "tasks" should actually be setup types or components. It does not make sense to me, that a user can select combinations of "standard", "lite" and "pro". Shouldn't those be a distinct options?