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Diffstat (limited to 'ncurses-5.9/c++/cursesf.h')
| -rw-r--r-- | ncurses-5.9/c++/cursesf.h | 967 |
1 files changed, 967 insertions, 0 deletions
diff --git a/ncurses-5.9/c++/cursesf.h b/ncurses-5.9/c++/cursesf.h new file mode 100644 index 0000000..19b57e9 --- /dev/null +++ b/ncurses-5.9/c++/cursesf.h @@ -0,0 +1,967 @@ +// * This makes emacs happy -*-Mode: C++;-*- +/**************************************************************************** + * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc. * + * * + * Permission is hereby granted, free of charge, to any person obtaining a * + * copy of this software and associated documentation files (the * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Juergen Pfeifer, 1997 * + ****************************************************************************/ + +// $Id$ + +#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); + + // Set these fields for the form + inline void setFields(NCursesFormField* Fields[]) { + OnError(::set_form_fields(form,mapFields(Fields))); + } + + // Remove the form from the screen + inline void unpost (void) { + OnError (::unpost_form (form)); + } + + // Post the form to the screen if flag is true, unpost it otherwise + inline void post(bool flag = TRUE) { + OnError (flag ? ::post_form(form) : ::unpost_form (form)); + } + + // Decorations + inline void frame(const char *title=NULL, const char* btitle=NULL) { + if (b_framed) + NCursesPanel::frame(title,btitle); + else + OnError(E_SYSTEM_ERROR); + } + + inline void boldframe(const char *title=NULL, const char* btitle=NULL) { + if (b_framed) + NCursesPanel::boldframe(title,btitle); + else + OnError(E_SYSTEM_ERROR); + } + + inline void label(const char *topLabel, const char *bottomLabel) { + if (b_framed) + NCursesPanel::label(topLabel,bottomLabel); + else + OnError(E_SYSTEM_ERROR); + } + + // ----- + // Hooks + // ----- + + // Called after the form gets repositioned in its window. + // This is especially true if the form is posted. + virtual void On_Form_Init(); + + // Called before the form gets repositioned in its window. + // This is especially true if the form is unposted. + virtual void On_Form_Termination(); + + // Called after the field became the current field + virtual void On_Field_Init(NCursesFormField& field); + + // Called before this field is left as current field. + virtual void On_Field_Termination(NCursesFormField& field); + + // Calculate required window size for the form. + void scale(int& rows, int& ncols) const { + OnError(::scale_form(form,&rows,&ncols)); + } + + // Retrieve number of fields in the form. + int count() const { + return ::field_count(form); + } + + // Make the page the current page of the form. + void set_page(int pageNum) { + OnError(::set_form_page(form, pageNum)); + } + + // Retrieve current page number + int page() const { + return ::form_page(form); + } + + // Switch on the forms options + inline void options_on (Form_Options opts) { + OnError (::form_opts_on (form, opts)); + } + + // Switch off the forms options + inline void options_off (Form_Options opts) { + OnError (::form_opts_off (form, opts)); + } + + // Retrieve the forms options + inline Form_Options options () const { + return ::form_opts (form); + } + + // Set the forms options + inline void set_options (Form_Options opts) { + OnError (::set_form_opts (form, opts)); + } + + // Are there more data in the current field after the data shown + inline bool data_ahead() const { + return ::data_ahead(form); + } + + // Are there more data in the current field before the data shown + inline bool data_behind() const { + return ::data_behind(form); + } + + // Position the cursor to the current field + inline void position_cursor () { + OnError (::pos_form_cursor (form)); + } + // Set the current field + inline void set_current(NCursesFormField& F) { + OnError (::set_current_field(form, F.field)); + } + + // Provide a default key virtualization. Translate the keyboard + // code c into a form request code. + // The default implementation provides a hopefully straightforward + // mapping for the most common keystrokes and form requests. + virtual int virtualize(int c); + + // Operators + inline NCursesFormField* operator[](int i) const { + if ( (i < 0) || (i >= ::field_count (form)) ) + OnError (E_BAD_ARGUMENT); + return my_fields[i]; + } + + // Perform the menu's operation + // Return the field where you left the form. + virtual NCursesFormField* operator()(void); + + // Exception handlers. The default is a Beep. + virtual void On_Request_Denied(int c) const; + virtual void On_Invalid_Field(int c) const; + virtual void On_Unknown_Command(int c) const; + +}; + +// +// ------------------------------------------------------------------------- +// This is the typical C++ typesafe way to allow to attach +// user data to a field of a form. Its assumed that the user +// data belongs to some class T. Use T as template argument +// to create a UserField. +// ------------------------------------------------------------------------- +template<class T> class NCURSES_IMPEXP NCursesUserField : public NCursesFormField +{ +public: + NCursesUserField (int rows, + int ncols, + int first_row = 0, + int first_col = 0, + const T* p_UserData = STATIC_CAST(T*)(0), + int offscreen_rows = 0, + int additional_buffers = 0) + : NCursesFormField (rows, ncols, + first_row, first_col, + offscreen_rows, additional_buffers) { + if (field) + OnError(::set_field_userptr(field, STATIC_CAST(void *)(p_UserData))); + } + + virtual ~NCursesUserField() {}; + + inline const T* UserData (void) const { + return reinterpret_cast<const T*>(::field_userptr (field)); + } + + inline virtual void setUserData(const T* p_UserData) { + if (field) + OnError (::set_field_userptr (field, STATIC_CAST(void *)(p_UserData))); + } +}; +// +// ------------------------------------------------------------------------- +// The same mechanism is used to attach user data to a form +// ------------------------------------------------------------------------- +// +template<class T> class NCURSES_IMPEXP NCursesUserForm : public NCursesForm +{ +protected: + // 'Internal' constructor, builds an object without association to a + // field array. + NCursesUserForm( int nlines, + int ncols, + int begin_y = 0, + int begin_x = 0, + const T* p_UserData = STATIC_CAST(T*)(0)) + : NCursesForm(nlines,ncols,begin_y,begin_x) { + if (form) + set_user (const_cast<void *>(p_UserData)); + } + +public: + NCursesUserForm (NCursesFormField Fields[], + const T* p_UserData = STATIC_CAST(T*)(0), + bool with_frame=FALSE, + bool autoDelete_Fields=FALSE) + : NCursesForm (Fields, with_frame, autoDelete_Fields) { + if (form) + set_user (const_cast<void *>(p_UserData)); + }; + + NCursesUserForm (NCursesFormField Fields[], + int nlines, + int ncols, + int begin_y = 0, + int begin_x = 0, + const T* p_UserData = STATIC_CAST(T*)(0), + bool with_frame=FALSE, + bool autoDelete_Fields=FALSE) + : NCursesForm (Fields, nlines, ncols, begin_y, begin_x, + with_frame, autoDelete_Fields) { + if (form) + set_user (const_cast<void *>(p_UserData)); + }; + + virtual ~NCursesUserForm() { + }; + + inline T* UserData (void) const { + return reinterpret_cast<T*>(get_user ()); + }; + + inline virtual void setUserData (const T* p_UserData) { + if (form) + set_user (const_cast<void *>(p_UserData)); + } + +}; +// +// ------------------------------------------------------------------------- +// Builtin Fieldtypes +// ------------------------------------------------------------------------- +// +class NCURSES_IMPEXP Alpha_Field : public NCursesFieldType +{ +private: + int min_field_width; + + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype,min_field_width)); + } + +public: + Alpha_Field(int width) + : NCursesFieldType(TYPE_ALPHA), + min_field_width(width) { + } +}; + +class NCURSES_IMPEXP Alphanumeric_Field : public NCursesFieldType +{ +private: + int min_field_width; + + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype,min_field_width)); + } + +public: + Alphanumeric_Field(int width) + : NCursesFieldType(TYPE_ALNUM), + min_field_width(width) { + } +}; + +class NCURSES_IMPEXP Integer_Field : public NCursesFieldType +{ +private: + int precision; + long lower_limit, upper_limit; + + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype, + precision,lower_limit,upper_limit)); + } + +public: + Integer_Field(int prec, long low=0L, long high=0L) + : NCursesFieldType(TYPE_INTEGER), + precision(prec), lower_limit(low), upper_limit(high) { + } +}; + +class NCURSES_IMPEXP Numeric_Field : public NCursesFieldType +{ +private: + int precision; + double lower_limit, upper_limit; + + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype, + precision,lower_limit,upper_limit)); + } + +public: + Numeric_Field(int prec, double low=0.0, double high=0.0) + : NCursesFieldType(TYPE_NUMERIC), + precision(prec), lower_limit(low), upper_limit(high) { + } +}; + +class NCURSES_IMPEXP Regular_Expression_Field : public NCursesFieldType +{ +private: + char* regex; + + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype,regex)); + } + + void copy_regex(const char *source) + { + regex = new char[1 + ::strlen(source)]; + (::strcpy)(regex, source); + } + +public: + Regular_Expression_Field(const char *expr) + : NCursesFieldType(TYPE_REGEXP), + regex(NULL) + { + copy_regex(expr); + } + + Regular_Expression_Field& operator=(const Regular_Expression_Field& rhs) + { + if (this != &rhs) { + *this = rhs; + copy_regex(rhs.regex); + NCursesFieldType::operator=(rhs); + } + return *this; + } + + Regular_Expression_Field(const Regular_Expression_Field& rhs) + : NCursesFieldType(rhs), + regex(NULL) + { + copy_regex(rhs.regex); + } + + ~Regular_Expression_Field() { + delete[] regex; + } +}; + +class NCURSES_IMPEXP Enumeration_Field : public NCursesFieldType +{ +private: + const char** list; + int case_sensitive; + int non_unique_matches; + + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype, + list,case_sensitive,non_unique_matches)); + } +public: + Enumeration_Field(const char* enums[], + bool case_sens=FALSE, + bool non_unique=FALSE) + : NCursesFieldType(TYPE_ENUM), + list(enums), + case_sensitive(case_sens ? -1 : 0), + non_unique_matches(non_unique ? -1 : 0) { + } + + Enumeration_Field& operator=(const Enumeration_Field& rhs) + { + if (this != &rhs) { + *this = rhs; + NCursesFieldType::operator=(rhs); + } + return *this; + } + + Enumeration_Field(const Enumeration_Field& rhs) + : NCursesFieldType(rhs), + list(rhs.list), + case_sensitive(rhs.case_sensitive), + non_unique_matches(rhs.non_unique_matches) + { + } +}; + +class NCURSES_IMPEXP IPV4_Address_Field : public NCursesFieldType +{ +private: + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype)); + } + +public: + IPV4_Address_Field() : NCursesFieldType(TYPE_IPV4) { + } +}; + +extern "C" { + bool _nc_xx_fld_fcheck(FIELD *, const void*); + bool _nc_xx_fld_ccheck(int c, const void *); + void* _nc_xx_fld_makearg(va_list*); +} + +// +// ------------------------------------------------------------------------- +// Abstract base class for User-Defined Fieldtypes +// ------------------------------------------------------------------------- +// +class NCURSES_IMPEXP UserDefinedFieldType : public NCursesFieldType +{ + friend class UDF_Init; // Internal helper to set up statics +private: + // For all C++ defined fieldtypes we need only one generic lowlevel + // FIELDTYPE* element. + static FIELDTYPE* generic_fieldtype; + +protected: + // This are the functions required by the low level libforms functions + // to construct a fieldtype. + friend bool _nc_xx_fld_fcheck(FIELD *, const void*); + friend bool _nc_xx_fld_ccheck(int c, const void *); + friend void* _nc_xx_fld_makearg(va_list*); + + void set(NCursesFormField& f) { + OnError(::set_field_type(f.get_field(),fieldtype,&f)); + } + +protected: + // Redefine this function to do a field validation. The argument + // is a reference to the field you should validate. + virtual bool field_check(NCursesFormField& f) = 0; + + // Redefine this function to do a character validation. The argument + // is the character to be validated. + virtual bool char_check (int c) = 0; + +public: + UserDefinedFieldType() : NCursesFieldType(generic_fieldtype) { + } +}; + +extern "C" { + bool _nc_xx_next_choice(FIELD*, const void *); + bool _nc_xx_prev_choice(FIELD*, const void *); +} + +// +// ------------------------------------------------------------------------- +// Abstract base class for User-Defined Fieldtypes with Choice functions +// ------------------------------------------------------------------------- +// +class NCURSES_IMPEXP UserDefinedFieldType_With_Choice : public UserDefinedFieldType +{ + friend class UDF_Init; // Internal helper to set up statics +private: + // For all C++ defined fieldtypes with choice functions we need only one + // generic lowlevel FIELDTYPE* element. + static FIELDTYPE* generic_fieldtype_with_choice; + + // This are the functions required by the low level libforms functions + // to construct a fieldtype with choice functions. + friend bool _nc_xx_next_choice(FIELD*, const void *); + friend bool _nc_xx_prev_choice(FIELD*, const void *); + +protected: + // Redefine this function to do the retrieval of the next choice value. + // The argument is a reference to the field tobe examined. + virtual bool next (NCursesFormField& f) = 0; + + // Redefine this function to do the retrieval of the previous choice value. + // The argument is a reference to the field tobe examined. + virtual bool previous(NCursesFormField& f) = 0; + +public: + UserDefinedFieldType_With_Choice() { + fieldtype = generic_fieldtype_with_choice; + } +}; + +#endif /* NCURSES_CURSESF_H_incl */ |