function printPdf() {
    SpreadsheetApp.flush();
    var ss = SpreadsheetApp.getActiveSpreadsheet();
    var sheet = ss.getActiveSheet();


var gid = sheet.getSheetId();


var pdfOpts = '&size=A4&fzr=false&portrait=false&fitw=true&gridlines=false&printtitle=false&sheetnames=false&pagenum=UNDEFINED&attachment=false&gid='+gid;
var last_row = sheet.getLastRow();
var printRange = '&c1=0' + '&r1=0' + '&c2=34' + '&r2='+last_row // B2:APn
var url = ss.getUrl().replace(/edit$/, '') + 'export?format=pdf' + pdfOpts  + printRange;

var app = UiApp.createApplication().setWidth(200).setHeight(50);
app.setTitle('Verze pro tisk');

var link = app.createAnchor('Zobrazit PDF', url).setTarget('_new');

app.add(link);

ss.show(app);

}

function printPDF() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = SpreadsheetApp.getActiveSheet();
  var cols = [2, 3, 4, 5, 7];    // columns to print
  var lastRow = sheet.getLastRow();
  var newSs = SpreadsheetApp.create(ss.getName() + ' for print', lastRow, cols.length);
  var newSheet = newSs.getSheets()[0];
  for (var i = 0; i < cols.length; i++) {
    var values = sheet.getRange(1, cols[i], lastRow, 1).getValues();
    newSheet.getRange(1, i + 1, lastRow, 1).setValues(values);
  }
  SpreadsheetApp.flush();

  //  copied from your code, including deprecated UiApp
  var pdfOpts = '&size=A4&fzr=false&portrait=false&fitw=true&gridlines=false&printtitle=false&sheetnames=false&pagenum=UNDEFINED&attachment=false&gid=0';
  var url = newSs.getUrl().replace(/edit$/, '') + 'export?format=pdf' + pdfOpts;
  var app = UiApp.createApplication().setWidth(200).setHeight(50);
  app.setTitle('Print Version');
  var link = app.createAnchor('Show PDF', url).setTarget('_new');
  app.add(link);
  ss.show(app);
  // End of copy

  DriveApp.getFileById(newSs.getId()).setTrashed(true); // delete temp file
}