home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The X-Philes (2nd Revision)
/
The X-Philes Number 1 (1995).iso
/
xphiles
/
coding
/
cpp
/
verify.cpp
< prev
next >
Wrap
C/C++ Source or Header
|
1995-03-23
|
1KB
|
54 lines
/*
* Turbo Vision example of a modified TInputLine that parses input as it
* is entered. This line allows only a range of characters to be passed,
* the range specified in the constructor and defaulting to numeric digits
* '0'-'9'.
*/
------------------------------------------------------------------------
The following example routines have been provided by the Technical
Support staff at Borland International. They are provided as a
courtesy and not as part of a Borland product, and as such, are
provided without the assurance of technical support or any specific
guarantees.
========================================================================
Copyright (c) 1991 by Borland International
All Rights Reserved.
#define Uses_TEvent
#define Uses_TInputLine
#include <tv.h>
#include <ctype.h>
#pragma hdrstop
class TBitLine : public TInputLine
{
public:
TBitLine(TRect& bounds, int aMaxLen, char low = '0', char high = '9') :
TInputLine(bounds, aMaxLen)
{
lowDigit = low; highDigit = high;
}
virtual void handleEvent(TEvent& event);
private:
char lowDigit, highDigit;
};
void TBitLine::handleEvent(TEvent& event)
{
char key = event.keyDown.charScan.charCode;
if( !(event.what == evKeyboard && isprint(key) &&
(key < lowDigit || key > highDigit)) )
TInputLine::handleEvent(event);
}