Using Release 5...
The OS Emulator has told me that I am attempting to read from low memory
when I simply bring up a form with a text field, and backspace over the
last character. This only happens once. No more errors until I start the
app again. There are no problems other than the emulator's warning message.
Any ideas? Thanks!
My method of setting the field text is shown here:
void SetFieldText( FormPtr formP, Word fieldID, CharPtr strP, BOOL bDrawIt )
{
Handle oldTxtH;
Handle txtH;
CharPtr txtP;
FieldPtr fldP;
Boolean fieldWasEditable;
// get some space in which to stash the string.
txtH = (Handle) MemHandleNew( StrLen( strP ) + 1 );
txtP = (CharPtr) MemHandleLock( txtH );
// copy the string.
StrCopy( txtP, strP );
// unlock the string handle.
MemHandleUnlock( txtH );
txtP = 0;
// get the field and the field's current text handle.
fldP = GetFieldPointer( formP, fieldID );
oldTxtH = FldGetTextHandle( fldP );
// set the field's text to the new text.
fieldWasEditable = fldP->attr.editable;
fldP->attr.editable = true;
FldSetTextHandle( fldP, txtH );
if (bDrawIt)
FldDrawField( fldP );
fldP->attr.editable = fieldWasEditable;
// free the handle AFTER we call FldSetTextHandle().
if ( oldTxtH != NULL )
MemHandleFree( oldTxtH );
}
- Alan Macy
http://www.ResponsiveSoftware.com
Time and Billing for Consultants and Others
