> From: [EMAIL PROTECTED]
>
> void MainFormDoMQe( void )
> {
> MQEBYTE byteBuf[]={0x31,0x32,0x33,0x34 }; /*By Eugene*/
> MQEBYTE *byteBufs;
> SetFieldTextFromStr( MainErrorField, (char *)byteBuf); /*??????Here has
> error*/
> SetFieldTextFromStr( MainErrorField, (char *)byteBufs); /*??????Here
> also has error*/
> }
>
Eugene -
There were several errors in your code -- too many to respond to them all.
However, your basic question is "how can I write an array of bytes to the
screen. The answer is two fold:
1) Don't mess with the definitions of the parameters in SetFieldTextFromStr
and SetFieldTextFromHandle. Here is some working code:
/***********************************************************************
* Sets text in a field to textP, given an object ID and a text MemHandle
***********************************************************************/
static FieldPtr SetFieldTextFromHandle( UInt16 fieldID, MemHandle txtH )
{
MemHandle oldTxtH;
FormPtr frm = FrmGetFormPtr( MainForm );
FieldPtr fldP;
// get the field and its text MemHandle
fldP = FrmGetObjectPtr( frm, FrmGetObjectIndex( frm, fieldID ) );
ErrNonFatalDisplayIf( !fldP, "missing field" );
oldTxtH = FldGetTextHandle( fldP );
// set field to new text
FldSetTextHandle( fldP, txtH );
FldDrawField( fldP );
// free old MemHandle
if ( oldTxtH ) MemHandleFree( oldTxtH );
return fldP;
} // SetFieldTextFromHandle
/***********************************************************************
* Sets text in a field to textP, given an object ID and a string
***********************************************************************/
static FieldPtr SetFieldTextFromStr( UInt16 fieldID, Char *strP )
{
MemHandle txtH;
txtH = MemHandleNew( StrLen( strP ) + 1 );
if ( !txtH )
return NULL;
StrCopy( MemHandleLock(txtH), strP );
MemHandleUnlock( txtH );
return SetFieldTextFromHandle( fieldID, txtH );
} // SetFieldTextFromStr
2) The second part has to do with converting your array of bytes to a
string. Here is one way:
UInt8 byteBuf[] = {0x31,0x32,0x33,0x34};
Char byteChars[5];
MemMove(byteChars, byteBuf, 4);
byteChars[4] = '\0';
SetFieldTextFromStr(MainErrorField, byteChars);
Note that I changed MQEBYTE to UInt8. You didn't show how you defined
MQEBYTE. If it actually is a single byte, then use UInt8, which is the same
as an unsigned char. Depending on how you defined MQEBYTE, you may have to
use a different method to convert it to chars.
--
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