cursesf.h

ncurses 库 可能有用酒用 没用就算了 我觉得还可以用

// * This makes emacs happy -*-Mode: C++;-*-
/****************************************************************************
 * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc.              *
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 * copies of the Software, and to permit persons to whom the Software is    *
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 ****************************************************************************/

/****************************************************************************
 *   Author: Juergen Pfeifer, 1997                                          *
 ****************************************************************************/

// $Id: cursesf.h,v 1.28 2005/08/13 18:08:24 tom Exp $

#ifndef NCURSES_CURSESF_H_incl
#define NCURSES_CURSESF_H_incl 1

#include <cursesp.h>

#ifndef __EXT_QNX
#include <string.h>
#endif

extern "C" {
#  include <form.h>
}
//
// -------------------------------------------------------------------------
// The abstract base class for buitin and user defined Fieldtypes.
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP NCursesFormField; // forward declaration

// Class to represent builtin field types as well as C++ written new
// fieldtypes (see classes UserDefineFieldType...
class NCURSES_IMPEXP NCursesFieldType
{
  friend class NCursesFormField;

protected:
  FIELDTYPE* fieldtype;

  inline void OnError(int err) const THROWS(NCursesFormException) {
    if (err!=E_OK)
      THROW(new NCursesFormException (err));
  }

  NCursesFieldType(FIELDTYPE *f) : fieldtype(f) {
  }

  virtual ~NCursesFieldType() {}

  // Set the fields f fieldtype to this one.
  virtual void set(NCursesFormField& f) = 0;

public:
  NCursesFieldType()
    : fieldtype(STATIC_CAST(FIELDTYPE*)(0))
  {
  }

  NCursesFieldType& operator=(const NCursesFieldType& rhs)
  {
    if (this != &rhs) {
      *this = rhs;
    }
    return *this;
  }

  NCursesFieldType(const NCursesFieldType& rhs)
    : fieldtype(rhs.fieldtype)
  {
  }

};

//
// -------------------------------------------------------------------------
// The class representing a forms field, wrapping the lowlevel FIELD struct
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP NCursesFormField
{
  friend class NCursesForm;

protected:
  FIELD *field;		     // lowlevel structure
  NCursesFieldType* ftype;   // Associated field type

  // Error handler
  inline void OnError (int err) const THROWS(NCursesFormException) {
    if (err != E_OK)
      THROW(new NCursesFormException (err));
  }

public:
  // Create a 'Null' field. Can be used to delimit a field list
  NCursesFormField()
    : field(STATIC_CAST(FIELD*)(0)),
      ftype(STATIC_CAST(NCursesFieldType*)(0))
  {
  }

  // Create a new field
  NCursesFormField (int rows,
		    int ncols,
		    int first_row = 0,
		    int first_col = 0,
		    int offscreen_rows = 0,
		    int additional_buffers = 0)
    : field(0),
      ftype(STATIC_CAST(NCursesFieldType*)(0))
  {
      field = ::new_field(rows, ncols, first_row, first_col,
			  offscreen_rows, additional_buffers);
      if (!field)
	OnError(errno);
  }

  NCursesFormField& operator=(const NCursesFormField& rhs)
  {
    if (this != &rhs) {
      *this = rhs;
    }
    return *this;
  }

  NCursesFormField(const NCursesFormField& rhs)
    : field(rhs.field), ftype(rhs.ftype)
  {
  }

  virtual ~NCursesFormField ();

  // Duplicate the field at a new position
  inline NCursesFormField* dup(int first_row, int first_col)
  {
    NCursesFormField* f = new NCursesFormField();
    if (!f)
      OnError(E_SYSTEM_ERROR);
    else {
      f->ftype = ftype;
      f->field = ::dup_field(field,first_row,first_col);
      if (!f->field)
	OnError(errno);
    }
    return f;
  }

  // Link the field to a new location
  inline NCursesFormField* link(int first_row, int first_col) {
    NCursesFormField* f = new NCursesFormField();
    if (!f)
      OnError(E_SYSTEM_ERROR);
    else {
      f->ftype = ftype;
      f->field = ::link_field(field,first_row,first_col);
      if (!f->field)
	OnError(errno);
    }
    return f;
  }

  // Get the lowlevel field representation
  inline FIELD* get_field() const {
    return field;
  }

  // Retrieve info about the field
  inline void info(int& rows, int& ncols,
		   int& first_row, int& first_col,
		   int& offscreen_rows, int& additional_buffers) const {
    OnError(::field_info(field, &rows, &ncols,
			 &first_row, &first_col,
			 &offscreen_rows, &additional_buffers));
  }

  // Retrieve info about the fields dynamic properties.
  inline void dynamic_info(int& dynamic_rows, int& dynamic_cols,
			   int& max_growth) const {
    OnError(::dynamic_field_info(field, &dynamic_rows, &dynamic_cols,
				 &max_growth));
  }

  // For a dynamic field you may set the maximum growth limit.
  // A zero means unlimited growth.
  inline void set_maximum_growth(int growth = 0) {
    OnError(::set_max_field(field,growth));
  }

  // Move the field to a new position
  inline void move(int row, int col) {
    OnError(::move_field(field,row,col));
  }

  // Mark the field to start a new page
  inline void new_page(bool pageFlag = FALSE) {
    OnError(::set_new_page(field,pageFlag));
  }

  // Retrieve whether or not the field starts a new page.
  inline bool is_new_page() const {
    return ::new_page(field);
  }

  // Set the justification for the field
  inline void set_justification(int just) {
    OnError(::set_field_just(field,just));
  }

  // Retrieve the fields justification
  inline int justification() const {
    return ::field_just(field);
  }
  // Set the foreground attribute for the field
  inline void set_foreground(chtype foreground) {
    OnError(::set_field_fore(field,foreground));
  }

  // Retrieve the fields foreground attribute
  inline chtype fore() const {
    return ::field_fore(field);
  }

  // Set the background attribute for the field
  inline void set_background(chtype background) {
    OnError(::set_field_back(field,background));
  }

  // Retrieve the fields background attribute
  inline chtype back() const {
    return ::field_back(field);
  }

  // Set the padding character for the field
  inline void set_pad_character(int padding) {
    OnError(::set_field_pad(field, padding));
  }

  // Retrieve the fields padding character
  inline int pad() const {
    return ::field_pad(field);
  }

  // Switch on the fields options
  inline void options_on (Field_Options opts) {
    OnError (::field_opts_on (field, opts));
  }

  // Switch off the fields options
  inline void options_off (Field_Options opts) {
    OnError (::field_opts_off (field, opts));
  }

  // Retrieve the fields options
  inline Field_Options options () const {
    return ::field_opts (field);
  }

  // Set the fields options
  inline void set_options (Field_Options opts) {
    OnError (::set_field_opts (field, opts));
  }

  // Mark the field as changed
  inline void set_changed(bool changeFlag = TRUE) {
    OnError(::set_field_status(field,changeFlag));
  }

  // Test whether or not the field is marked as changed
  inline bool changed() const {
    return ::field_status(field);
  }

  // Return the index of the field in the field array of a form
  // or -1 if the field is not associated to a form
  inline int (index)() const {
    return ::field_index(field);
  }

  // Store a value in a fields buffer. The default buffer is nr. 0
  inline void set_value(const char *val, int buffer = 0) {
    OnError(::set_field_buffer(field,buffer,val));
  }

  // Retrieve the value of a fields buffer. The default buffer is nr. 0
  inline char* value(int buffer = 0) const {
    return ::field_buffer(field,buffer);
  }

  // Set the validation type of the field.
  inline void set_fieldtype(NCursesFieldType& f) {
    ftype = &f;
    f.set(*this); // A good friend may do that...
  }

  // Retrieve the validation type of the field.
  inline NCursesFieldType* fieldtype() const {
    return ftype;
  }

};

  // This are the built-in hook functions in this C++ binding. In C++ we use
  // virtual member functions (see below On_..._Init and On_..._Termination)
  // to provide this functionality in an object oriented manner.
extern "C" {
  void _nc_xx_frm_init(FORM *);
  void _nc_xx_frm_term(FORM *);
  void _nc_xx_fld_init(FORM *);
  void _nc_xx_fld_term(FORM *);
}

//
// -------------------------------------------------------------------------
// The class representing a form, wrapping the lowlevel FORM struct
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP NCursesForm : public NCursesPanel
{
protected:
  FORM* form;  // the lowlevel structure

private:
  NCursesWindow* sub;   // the subwindow object
  bool b_sub_owner;     // is this our own subwindow?
  bool b_framed;	// has the form a border?
  bool b_autoDelete;    // Delete fields when deleting form?

  NCursesFormField** my_fields; // The array of fields for this form

  // This structure is used for the form's user data field to link the
  // FORM* to the C++ object and to provide extra space for a user pointer.
  typedef struct {
    void*	       m_user;	    // the pointer for the user's data
    const NCursesForm* m_back;      // backward pointer to C++ object
    const FORM*	       m_owner;
  } UserHook;

  // Get the backward pointer to the C++ object from a FORM
  static inline NCursesForm* getHook(const FORM *f) {
    UserHook* hook = reinterpret_cast<UserHook*>(::form_userptr(f));
    assert(hook != 0 && hook->m_owner==f);
    return const_cast<NCursesForm*>(hook->m_back);
  }

  friend void _nc_xx_frm_init(FORM *);
  friend void _nc_xx_frm_term(FORM *);
  friend void _nc_xx_fld_init(FORM *);
  friend void _nc_xx_fld_term(FORM *);

  // Calculate FIELD* array for the menu
  FIELD** mapFields(NCursesFormField* nfields[]);

protected:
  // internal routines
  inline void set_user(void *user) {
    UserHook* uptr = reinterpret_cast<UserHook*>(::form_userptr (form));
    assert (uptr != 0 && uptr->m_back==this && uptr->m_owner==form);
    uptr->m_user = user;
  }

  inline void *get_user() {
    UserHook* uptr = reinterpret_cast<UserHook*>(::form_userptr (form));
    assert (uptr != 0 && uptr->m_back==this && uptr->m_owner==form);
    return uptr->m_user;
  }

  void InitForm (NCursesFormField* Fields[],
		 bool with_frame,
		 bool autoDeleteFields);

  inline void OnError (int err) const THROWS(NCursesFormException) {
    if (err != E_OK)
      THROW(new NCursesFormException (err));
  }

  // this wraps the form_driver call.
  virtual int driver (int c) ;

  // 'Internal' constructor, builds an object without association to a
  // field array.
  NCursesForm( int  nlines,
	       int  ncols,
	       int  begin_y = 0,
	       int  begin_x = 0)
    : NCursesPanel(nlines, ncols, begin_y, begin_x),
      form (STATIC_CAST(FORM*)(0)),
      sub(0),
      b_sub_owner(0),
      b_framed(0),
      b_autoDelete(0),
      my_fields(0)
  {
  }

public:
  // Create form for the default panel.
  NCursesForm (NCursesFormField* Fields[],
	       bool with_frame=FALSE,	      // reserve space for a frame?
	       bool autoDelete_Fields=FALSE)  // do automatic cleanup?
    : NCursesPanel(),
      form(0),
      sub(0),
      b_sub_owner(0),
      b_framed(0),
      b_autoDelete(0),
      my_fields(0)
  {
    InitForm(Fields, with_frame, autoDelete_Fields);
  }

  // Create a form in a panel with the given position and size.
  NCursesForm (NCursesFormField* Fields[],
	       int  nlines,
	       int  ncols,
	       int  begin_y,
	       int  begin_x,
	       bool with_frame=FALSE,	     // reserve space for a frame?
	       bool autoDelete_Fields=FALSE) // do automatic cleanup?
    : NCursesPanel(nlines, ncols, begin_y, begin_x),
      form(0),
      sub(0),
      b_sub_owner(0),
      b_framed(0),
      b_autoDelete(0),
      my_fields(0)
  {
      InitForm(Fields, with_frame, autoDelete_Fields);
  }

  NCursesForm& operator=(const NCursesForm& rhs)
  {
    if (this != &rhs) {
      *this = rhs;
      NCursesPanel::operator=(rhs);
    }
    return *this;
  }

  NCursesForm(const NCursesForm& rhs)
    : NCursesPanel(rhs),
      form(rhs.form),
      sub(rhs.sub),
      b_sub_owner(rhs.b_sub_owner),
      b_framed(rhs.b_framed),
      b_autoDelete(rhs.b_autoDelete),
      my_fields(rhs.my_fields)
  {
  }

  virtual ~NCursesForm();

  // Set the default attributes for the form
  virtual void setDefaultAttributes();

  // Retrieve current field of the form.
  inline NCursesFormField* current_field() const {
    return my_fields[::field_index(::current_field(form))];
  }

  // Set the forms subwindow
  void setSubWindow(NCursesWindow& sub);