campo-sirio/include/form.h

#ifndef __FORM_H
#define __FORM_H

#ifndef __PRINTER_H
#include <printer.h>
#endif

#ifndef __SCANNER_H
#include <scanner.h>
#endif

#ifndef __RELATION_H
class TRelation;
class TCursor;
#endif

enum pagetype { odd_page, even_page, first_page, last_page };

class TForm;
class TForm_item;

class TPrint_section : public TArray
{
  word _height;         // Altezza della sezione

  TForm* _form;         // Form cui appartiene alla sezione
  TArray _item;         // Lista dei campi da stampare

protected:
  virtual void print_on(ostream& out) const;
  TForm_item* parse_item(const TString& key);
  TForm_item* parse_item(TScanner& scanner);

public:
  TPrintrow& row(int num);
  TForm* form() const { return _form; }

  TForm_item& field(int n) const { return (TForm_item&)_item[n]; }
  word fields() const { return _item.items(); }
  word height() const { return _height; }
  
  void reset();
  bool update();
  bool parse(TScanner& scanner);

  bool edit();

  TPrint_section(TForm* parent);
  virtual ~TPrint_section() {}
};


class TForm : public TObject
{                    
  TFilename _name;       // Profile name

  TRelation* _relation;  // Can be NULL
  TCursor* _cursor;      // Can be NULL

  TArray _head;          // Headers
  TArray _body;          // Bodies
  TArray _foot;          // Footers
  
  bool _lastpage;

  TPrint_section& page2pos(const TArray& a, word p) const;
  
  static void header_handler(TPrinter& p);
  static void footer_handler(TPrinter& p);

protected:
  TPrint_section& section(char s, pagetype t); // H = Header, B = Body, F = Footer
  
  void print_section(ostream& out, const TArray& s, const char* name) const;
  virtual void print_on(ostream& out) const;

  bool parse_use(TScanner&);
  bool parse_join(TScanner&);

  word page(const TPrinter& p) const;
  
  virtual long records() const;
  virtual word set_header(word p, bool u);
  virtual word set_body(word p, bool u);
  virtual word set_footer(word p, bool u);
  
public:
  bool print(long from = 0L, long to = -1L);
  
  TRelation* relation() const { return _relation; }
  TCursor* cursor() const { return _cursor; }

  bool edit(char section, pagetype t);

  TForm(const char* form);
  ~TForm();
};

#endif