VKON / TVision-0.19 / tvision.git / examples / tvforms / fields.cpp 

            

              
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/*-------------------------------------------------------*/
/*                                                       */
/*   Turbo Vision Forms Demo                             */
/*                                                       */
/*   Fields.cpp: Support source file for TVFORMS demo    */
/*-------------------------------------------------------*/
/*
 *      Turbo Vision - Version 2.0
 *
 *      Copyright (c) 1994 by Borland International
 *      All Rights Reserved.
 *
 */
#define Uses_TStreamableClass
#define Uses_TInputLine
#define Uses_TStreamable
#define Uses_MsgBox
#include <tvision/tv.h>
__link( RInputLine )
#if !defined( __FIELDS_H )
#include "fields.h"
#endif  // __FIELDS_H
#if !defined( __STRING_H )
#include <string.h>
#endif  // __STRING_H
#if !defined( __STDLIB_H )
#include <stdlib.h>
#endif  // __STDLIB_H
// TKeyInputLine
const char *const TKeyInputLine::name = "TKeyInputLine";
TStreamable *TKeyInputLine::build()
{
    return new TKeyInputLine( streamableInit );
}
TKeyInputLine::TKeyInputLine( const TRect& bounds, int aMaxLen ) :
    TInputLine( bounds, aMaxLen )
{
}
TStreamableClass RKeyInputLine( TKeyInputLine::name,
                                  TKeyInputLine::build,
                                  __DELTA(TKeyInputLine)
                                );
Boolean TKeyInputLine::valid( ushort command )
{
    Boolean ok;
    ok = True;
    if ( ( command != cmCancel) && ( command != cmValid ) )
        if ( strlen( data ) == 0 )
            {
            select();
            messageBox("This field cannot be empty.", mfError | mfOKButton);
            ok = False;
            }
    if ( ok )
        return TInputLine::valid(command);
    else
        return False;
}
// TNumInputLine
const char * const TNumInputLine::name = "TNumInputLine";
void TNumInputLine::write( opstream& os )
{
    TInputLine::write( os );
    os << min;
    os << max;
     
}
void *TNumInputLine::read( ipstream& is )
{
    TInputLine::read( is );
    is >> min;
    is >> max;
    return this;
}
TStreamable *TNumInputLine::build()
{
    return new TNumInputLine( streamableInit );
}
TStreamableClass RNumInputLine( TNumInputLine::name,
                                  TNumInputLine::build,
                                  __DELTA(TNumInputLine)
                                );
TNumInputLine::TNumInputLine( const TRect& bounds,
                              int aMaxLen,
                              int32_t aMin,
                              int32_t aMax ) :
    TInputLine(bounds, aMaxLen)
{
    min = aMin;
    max = aMax;
}
ushort TNumInputLine::dataSize()
{
    return sizeof(int32_t);
}
void TNumInputLine::getData( void *rec )
{
    *(int32_t *)rec = atol(data);
}
void TNumInputLine::setData( void *rec )
{
    ltoa(*(int32_t *)rec, data, 10);
    selectAll(True);
}
Boolean TNumInputLine::valid( ushort command )
{
    int32_t value;
    Boolean ok;
    ok = True;
    if ( (command != cmCancel) && (command != cmValid) )
        {
        if (strlen(data) == 0)
            strcpy(data,"0");
        value = atol(data);
        if ( (value == 0) || (value < min) || (value > max) )
            {
            select();
            messageBox(mfError | mfOKButton, "Number must be from %ld to %ld.", (long) min, (long) max);
            selectAll(True);
            ok = False;
            }
        }
    if (ok)
        return TInputLine::valid(command);
    else
        return False;
}