Intermec ck1 Reference Guide

This section provides example code for scanning bar code labels. 

The program uses TFmBarcodeReaderCreate to create the graphic 
interface. The main function starts the connection to the hamster daemon 
to enable the bar code and get the bar code that is waiting to be read. It 
uses otk_app_register_fd, which has GrRegisterFd in Nano-X check that 
there is a bar code to read. After getting the typed bar code from the 
daemon (OnScanned), it changes the label to display the bar code name 
and changes the content of the entry. The application redirects the event 
handler of the main form to check if a key is pressed (grab_event). Because 
it uses tpt_Scanner, the application should read the bar code from the 
daemon itself. If it uses tpt_ScanKey, the daemon generates keyboard 
events to key in the bar code scanned that gets more time to key in. 

Filename: main.c 
Using October widget to scan the bar codes using tpt_Scanner. 
#include <otkapplication.h> 
#include <otkcontrol.h> 
#include <otkentry.h> 
#include <otklabel.h> 
#include <otktitlebar.h> 
#include <ScClient.h> 
#include <eslib_buzzer.h> 
#include <eslib_led.h> 
 
typedef struct 
{ 
  OtkControl  cntlMain; 
  OtkLabel    lblType; 
  OtkEntry    edtBarcode; 
  OtkTitleBar tbMain; 
  unsigned char textBuffer[256]; 
} TFmBarcodeReader; 
 
static int Hamster_Handle = -1; 
static void TFmBarcodeReaderCreate(TFmBarcodeReader*); 
 
static TFmBarcodeReader fmBarcodeReader; 
 
#undef ENABLE_NLS 
#ifdef ENABLE_NLS 
#define _(x) gettext(x); 
#else 
#define _(x) (x) 
#endif 
#define N_(x) (x) 
 
static OtkWidgetEventHandler prev_handler = NULL;