TMainForm = class(TForm)
    btnSaveGroff: TButton;
    btnLoadGroff: TButton;
    btnBuild: TButton;
    btnDownloadGroffWindows: TButton;
    btnSaveSettings: TButton;
    chkLogFile: TCheckBox;
    chkAutoSaveBuildSettings: TCheckBox;
    chkPdfMark: TCheckBox;
    chkRefer: TCheckBox;
    chkChem: TCheckBox;
    chkGrn: TCheckBox;
    chkTbl: TCheckBox;
    chkPic: TCheckBox;

  // Restore the settings
  iniStorage.Restore;
  storeBuildSettings := iniStorage.ReadBoolean('AutoSaveBuildSettings', False);
  chkAutoSaveBuildSettings.Checked := storeBuildSettings;

  if storeBuildSettings then
  begin
       chkLogFile.Checked := iniStorage.ReadBoolean('BuildLogFile', False);
       cmbMacro.Text := iniStorage.ReadString('BuildChosenMacro', '[ select ]');
       chkChem.Checked := iniStorage.ReadBoolean('BuildUseChem', False);
       chkEqn.Checked := iniStorage.ReadBoolean('BuildUseEqn', False);
       chkGrn.Checked := iniStorage.ReadBoolean('BuildUseGrn', False);
       chkPic.Checked := iniStorage.ReadBoolean('BuildUsePic', False);
       chkRefer.Checked := iniStorage.ReadBoolean('BuildUseRefer', False);
       chkTbl.Checked := iniStorage.ReadBoolean('BuildUseTbl', False);

    reGroffStudioVersion := TRegExpr.Create('studio-win ([\d\.]+) (.*)$');
    reGroffStudioVersion.ModifierM := True;
    if reGroffStudioVersion.Exec(OnlineVersionsFile) then
    begin
      // Compare the two versions - ours and the online one:
      GroffHelpers.VerStrCompare(reGroffStudioVersion.Match[1], FileVerInfo.VersionStrings.Values['FileVersion'], HasVersionUpdate);
      if HasVersionUpdate > 0 then
        MainStatusBar.Panels[2].Text := 'update ' + reGroffStudioVersion.Match[1] + ' available'
        MainStatusBar.Panels[2].Text := 'update ' + reGroffStudioVersion.Match[1] + ' available';
      else
        MainStatusBar.Panels[2].Text := IntToStr(HasVersionUpdate);
    end else MainStatusBar.Panels[2].Text := '';
    {$ELSE}
    // Non-Windows platforms won't need some of that.
    {$IFDEF DARWIN}
    // What's the latest available version?
    MainStatusBar.Panels[2].Text := '';
    try

   {$ENDIF}
end;

procedure TMainForm.btnBuildClick(Sender: TObject);
var
  buildSuccess: Boolean;
  buildOpts: String;
  logFileName: String;
  outputFileName: String;
begin
  // Reset status display:
  MainStatusBar.Panels[1].Text := '';

  BuildWindow := TBuildStatusWindow.Create(Application);
  BuildWindow.ShowModal;
  BuildWindow.Show;

  // Build the parameters:
  buildOpts := 'groff';

  // - Macro:
  buildOpts := buildOpts + ' -' + cmbMacro.SelText;
  if cmbMacro.SelText <> '' then buildOpts := buildOpts + ' -' + cmbMacro.SelText;

  // - Enforce UTF-8:
  buildOpts := buildOpts + ' -Kutf8';

  // - Preprocessors:
  if chkChem.Checked then   buildOpts := buildOpts + ' -chem';
  if chkEqn.Checked then    buildOpts := buildOpts + ' -eqn';

  end
  else outputFileName := currentGroffFilePath + '.ps';

  // - Input file:
  buildOpts := buildOpts + ' ' + currentGroffFilePath;
  buildOpts := buildOpts + ' > ' + outputFileName;

  // - Log file:
  if chkLogFile.Checked then logFileName := currentGroffFilePath + '.log';

  // Build:
  buildSuccess := BuildWindow.BuildDocument(buildOpts);
  buildSuccess := BuildWindow.BuildDocument(buildOpts, logFileName);
  if buildSuccess then
    MainStatusBar.Panels[1].Text := 'build successful'
  else
    MainStatusBar.Panels[1].Text := 'build problem';

  FreeAndNil(BuildWindow);
end;

  begin
    if FileExists(odOpenGroffFile.FileName) then
    begin
      currentGroffFilePath := odOpenGroffFile.FileName;
      currentGroffFileName := ExtractFileName(odOpenGroffFile.FileName);
      SynEdit1.Lines.LoadFromFile(odOpenGroffFile.FileName);

      if hasGroff then btnBuild.Enabled := True;
      if hasGroff then
      begin
        btnBuild.Enabled := True;
        chkLogFile.Enabled := True;
      end;

      // Display the current file:
      MainStatusBar.Panels[0].Text := currentGroffFileName;
    end;
  end;
end;

procedure TMainForm.btnSaveGroffClick(Sender: TObject);
begin
  if FileExists(currentGroffFilePath) then
    // We don't need to open the Save As box every time.
    SynEdit1.Lines.SaveToFile(currentGroffFilePath)
  else if sdSaveGroffFile.Execute then
  begin
    currentGroffFilePath := sdSaveGroffFile.FileName;
    currentGroffFileName := ExtractFileName(currentGroffFilePath);
    SynEdit1.Lines.SaveToFile(sdSaveGroffFile.FileName);

    if hasGroff then btnBuild.Enabled := True;
    if hasGroff then begin
      btnBuild.Enabled := True;
      chkLogFile.Enabled := True;
    end;
  end;

  // Remove the "Changed" mark:
  MainStatusBar.Panels[0].Text := currentGroffFileName;
  unsavedChanges := False;
end;

procedure TMainForm.btnSaveSettingsClick(Sender: TObject);
begin
  // Store the build settings:
  iniStorage.WriteString('BuildChosenMacro', cmbMacro.Text);
  iniStorage.WriteBoolean('BuildLogFile', chkLogFile.Checked);
  iniStorage.WriteBoolean('BuildUseChem', chkChem.Checked);
  iniStorage.WriteBoolean('BuildUseEqn', chkEqn.Checked);
  iniStorage.WriteBoolean('BuildUseGrn', chkGrn.Checked);
  iniStorage.WriteBoolean('BuildUsePic', chkPic.Checked);
  iniStorage.WriteBoolean('BuildUseRefer', chkRefer.Checked);
  iniStorage.WriteBoolean('BuildUseTbl', chkTbl.Checked);
  iniStorage.WriteBoolean('BuildUsePdfMark', chkPdfMark.Checked);