IlvText and IlvTextField

BIDI > Support of Bidirectional and Contextual Languages > IlvText and IlvTextField

This section introduces the IlvText and IlvTextField member functions specific to bidirectional languages.

These member functions let you perform conversions from logical to visual strings, and conversely:

IlShort

IlvTextField::visualFromLogical(IlShort visPos) const;

IlShort

IlvTextField::logicalFromVisual(IlShort logPos) const;

IlShort

IlvText::visualFromLogical(const IlvTextLocation& visPos) const;

IlShort

IlvText::logicalFromVisual(const IlvTextLocation& logPos) const;

Erroneous Bidi Behavior

The IBM-Bidi library misinterprets a number of characters when the string to convert is exclusively composed of the following characters:

! " # $ % ' ( ) * + , . / : < = > [ \ ] ^ _ ` { | } ~

To get around this problem, the classes IlvText and IlvTextField provide the following method:

void IlvTextField::bidiFix();

void IlvText::bidiFix();

This method only corrects the erroneous behavior of the IBM-Bidi library we have just mentioned. On Windows platforms (Server 2003/XP/Vista), this method has no effect.

This method must be called for all instances of IlvTextField that are likely to use one of these characters at runtime. In particular, it is the case of the IlvTextField objects that serve as filter entry forms.

Version 6.0