Inno Setup Placing image/control on custom page

Question

I'm trying to have an image on a custom page I can get the custom page to show or the image on a predefined page but not on the custom page.

Problem I think is with Parent := CustomPage.ID;.

Parent := WizardForm.SelectTasksPage; works though.

How to do this properly?

procedure ImageOnClick(Sender: TObject);
var
  ErrorCode: Integer;
begin
  ShellExec('', 'http://test.com', '', '', SW_SHOW, ewNoWait, ErrorCode);
end;

var
  CustomPage: TWizardPage;
  BtnImage: TBitmapImage;

procedure InitializeWizard;
begin
  CustomPage := CreateCustomPage(wpLicense, 'Heading', 'Sub heading.');

  ExtractTemporaryFile('image.bmp');

  BtnImage := TBitmapImage.Create(WizardForm);
  with BtnImage do
  begin
    Parent := CustomPage.ID;
    Bitmap.LoadFromFile(ExpandConstant('{tmp}')+'\image.bmp');
    AutoSize := True;
    Left := 90;
    Top := WizardForm.SelectTasksPage.Top +
           WizardForm.SelectTasksPage.Height - Height - 8;
    Cursor := crHand;
    OnClick := @ImageOnClick;
  end;
end;

Answer 1

That's what TWizardPage.Surface of type TNewNotebookPage is for.

with BtnImage do
begin
  Parent := CustomPage.Surface;
  { ... }
end;

Related questions:

• TInputDirWizardPage with Radio Buttons
  (Similar question about radio buttons with more code)
• Add additional controls to standard Inno Setup pages?

---

Also, never use absolute coordinates and sizes. Your layout will break, when the wizard is shown on high DPI/scaled display, what is quite common nowadays with "retina" displays. Use ScaleX and ScaleY functions. For the same reason, you should have images with different resolutions ready (see Inno Setup WizardImageFile looks bad with font scaling on Windows 7). Or at least scale/stretch the bitmap.

CustomPage := CreateCustomPage(wpLicense, 'Heading', 'Sub heading.');

ExtractTemporaryFile('image.bmp');

BtnImage := TBitmapImage.Create(WizardForm);
with BtnImage do
begin
  Parent := CustomPage.Surface;
  Bitmap.LoadFromFile(ExpandConstant('{tmp}')+'\image.bmp');
  AutoSize := True;
  AutoSize := False;
  Height := ScaleY(Height);
  Width := ScaleX(Width);
  Stretch := True;
  Left := ScaleX(90);
  Top := WizardForm.SelectTasksPage.Top + WizardForm.SelectTasksPage.Height -
         Height - ScaleY(8);
  Cursor := crHand;
  OnClick := @ImageOnClick;
end;

Layout on 100% zoom (96 DPI):

Layout on 150% zoom (144 DPI):

Layout on 150% zoom (144 DPI) with offset/sizes scaling and image stretching: