Adjust Inno Setup MainPanel to banner image size - inno-setup

Question

The image I am not allowed to resize the image I am using for the MainPanel. This is causing issues, as it is covering an input query page I have created. How do I make sure the input query page with "grow" with the size dimensions set by the MainPanel image?
procedure InitializeWizard;
begin
{ Extract the banner so we can use it with the input page. }
BannerImage := TBitmapImage.Create(WizardForm);
BannerImage.Bitmap.LoadFromFile('C:\temp\tempbanner.bmp');
{ Create the Bitmap Banner img to show on the Main Panel. }
BannerImage.Parent := WizardForm.MainPanel;
WizardForm.MainPanel.Width := SPLASH_SCREEN_WIDTH;
WizardForm.MainPanel.Height := BANNER_HEIGHT;
BannerImage.Width := WizardForm.MainPanel.Width;
BannerImage.Height := WizardForm.MainPanel.Height;
{ BannerImage.Anchors := [akLeft, akTop, akRight, akBottom]; }
BannerImage.Stretch := False;
BannerImage.AutoSize := False;
WizardForm.WizardSmallBitmapImage.Visible := False;
WizardForm.PageDescriptionLabel.Visible := False;
WizardForm.PageNameLabel.Visible := False;
{ Create the input page }
ReportingServerPage := CreateInputQueryPage(wpWelcome,
'Title', 'What is your XXX?',
'Please enter your Server URL, then click Next.'+#13#10+#13#10+'If you proceed without entering a URL, you can update it in the %AppData%\xxxxxxxx\xxxx\xxxxx\xxxx_launcher.properties file at a later stage.');
ReportingServerPageId := ReportingServerPage.ID;
{ Add items (False means it's not a password edit) }
ReportingServerPage.Add('&Reporting Server URL:', False);
end;

Answer 1

You have to increase window height and move the window contents (Bevel1 and InnerNotebook) down.
Note that the bottom aligned controls (the bottom buttons) move automatically with the window height increase (assuming you use the latest version of Inno Setup).
[Files]
Source: "banner.bmp"; Flags: dontcopy
[Code]
var
ReportingServerPage: TInputQueryWizardPage;
procedure InitializeWizard;
var
BannerImage: TBitmapImage;
Delta: Integer;
begin
BannerImage := TBitmapImage.Create(WizardForm);
ExtractTemporaryFile('banner.bmp');
BannerImage.AutoSize := True;
BannerImage.Bitmap.LoadFromFile(ExpandConstant('{tmp}\banner.bmp'));
BannerImage.Parent := WizardForm.InnerPage;
BannerImage.Left := 0;
BannerImage.Top := 0;
Delta := BannerImage.Height - WizardForm.Bevel1.Top;
WizardForm.Height := WizardForm.Height + Delta;
WizardForm.Bevel1.Top := WizardForm.Bevel1.Top + Delta;
WizardForm.InnerNotebook.Top := WizardForm.InnerNotebook.Top + Delta;
WizardForm.InnerNotebook.Height := WizardForm.InnerNotebook.Height - Delta;
WizardForm.MainPanel.Visible := False;
{ Create the input page }
ReportingServerPage := CreateInputQueryPage(wpWelcome,
'Title', 'What is your XXX?',
'Please enter your Server URL, then click Next.'+#13#10+#13#10+
'If you proceed without entering a URL, you can update it in the ' +
'%AppData%\xxxxxxxx\xxxx\xxxxx\xxxx_launcher.properties file at a later stage.');
{ Add items (False means it's not a password edit) }
ReportingServerPage.Add('&Reporting Server URL:', False);
end;
Note that the code does not cater for image/window width. It assumes the image width fits the window width.