TQMetaProperty Class Reference

The TQMetaProperty class stores meta data about a property. More...

#include <ntqmetaobject.h>

List of all member functions.

Public Members

const char * type () const
const char * name () const
bool writable () const
bool isSetType () const
bool isEnumType () const
TQStrList enumKeys () const
int keyToValue ( const char * key ) const
const char * valueToKey ( int value ) const
int keysToValue ( const TQStrList & keys ) const
TQStrList valueToKeys ( int value ) const
bool designable ( TQObject * o = 0 ) const
bool scriptable ( TQObject * o = 0 ) const
bool stored ( TQObject * o = 0 ) const
bool reset ( TQObject * o ) const

Detailed Description

The TQMetaProperty class stores meta data about a property.

Property meta data includes type(), name(), and whether a property is writable(), designable() and stored().

The functions isSetType(), isEnumType() and enumKeys() provide further information about a property's type. The conversion functions keyToValue(), valueToKey(), keysToValue() and valueToKeys() allow conversion between the integer representation of an enumeration or set value and its literal representation.

Actual property values are set and received through TQObject's set and get functions. See TQObject::setProperty() and TQObject::property() for details.

You receive meta property data through an object's meta object. See TQMetaObject::property() and TQMetaObject::propertyNames() for details.

Member Function Documentation

bool TQMetaProperty::designable ( TQObject * o = 0 ) const

Returns TRUE if the property is designable for object o; otherwise returns FALSE.

If no object o is given, the function returns a static approximation.

TQStrList TQMetaProperty::enumKeys () const

Returns the possible enumeration keys if this property is an enumeration type (or a set type).

bool TQMetaProperty::isEnumType () const

Returns TRUE if the property's type is an enumeration value; otherwise returns FALSE.

bool TQMetaProperty::isSetType () const

Returns TRUE if the property's type is an enumeration value that is used as set, i.e. if the enumeration values can be OR-ed together; otherwise returns FALSE. A set type is implicitly also an enum type.

int TQMetaProperty::keyToValue ( const char * key ) const

Converts the enumeration key key to its integer value.

For set types, use keysToValue().

See also valueToKey(), isSetType(), and keysToValue().

int TQMetaProperty::keysToValue ( const TQStrList & keys ) const

Converts the list of keys keys to their combined (OR-ed) integer value.

const char * TQMetaProperty::name () const

Returns the name of the property.

bool TQMetaProperty::reset ( TQObject * o ) const

Tries to reset the property for object o with a reset method. On success, returns TRUE; otherwise returns FALSE.

Reset methods are optional, usually only a few properties support them.

bool TQMetaProperty::scriptable ( TQObject * o = 0 ) const

Returns TRUE if the property is scriptable for object o; otherwise returns FALSE.

If no object o is given, the function returns a static approximation.

bool TQMetaProperty::stored ( TQObject * o = 0 ) const

Returns TRUE if the property shall be stored for object o; otherwise returns FALSE.

If no object o is given, the function returns a static approximation.

const char * TQMetaProperty::type () const

Returns the type of the property.

const char * TQMetaProperty::valueToKey ( int value ) const

Converts the enumeration value value to its literal key.

For set types, use valueToKeys().

TQStrList TQMetaProperty::valueToKeys ( int value ) const

Converts the set value value to a list of keys.

bool TQMetaProperty::writable () const

Returns TRUE if the property is writable; otherwise returns FALSE.

Trademarks

TQt 3.3.8