QScriptClassPropertyIterator Class
The QScriptClassPropertyIterator class provides an iterator interface for custom Qt Script objects. 更多...
| 头文件: | #include <QScriptClassPropertyIterator> |
| qmake: | QT += script |
| 开始支持版本: | Qt 4.4 |
公有函数
| virtual | ~QScriptClassPropertyIterator() |
| virtual QScriptValue::PropertyFlags | flags() const |
| virtual bool | hasNext() const = 0 |
| virtual bool | hasPrevious() const = 0 |
| virtual uint | id() const |
| virtual QScriptString | name() const = 0 |
| virtual void | next() = 0 |
| QScriptValue | object() const |
| virtual void | previous() = 0 |
| virtual void | toBack() = 0 |
| virtual void | toFront() = 0 |
受保护的函数
| QScriptClassPropertyIterator(const QScriptValue &object) |
详细描述
The QScriptClassPropertyIterator class provides an iterator interface for custom Qt Script objects.
This class is only relevant if you have subclassed QScriptClass and want to provide enumeration of your custom properties (e.g. when objects of your class are used with QScriptValueIterator, or with the for-in statement in scripts).
The object() function returns the Qt Script object the iterator is traversing.
toFront(), hasNext() and next() provide forward iteration.
toBack(), hasPrevious() and previous() provide backward iteration.
name(), id() and flags() return information about the last property that was jumped over using next() or previous().
参见 QScriptClass::newIterator() and QScriptValueIterator.
成员函数
[protected] QScriptClassPropertyIterator::QScriptClassPropertyIterator(const QScriptValue &object)
Constructs an iterator for traversing object.
Subclasses should ensure that the iterator is set to the front of the sequence of properties (before the first property).
[virtual] QScriptClassPropertyIterator::~QScriptClassPropertyIterator()
Destroys the iterator.
[virtual] QScriptValue::PropertyFlags QScriptClassPropertyIterator::flags() const
Returns the flags of the last property that was jumped over using next() or previous().
The default implementation calls the propertyFlags() function of object() with argument name().
[pure virtual] bool QScriptClassPropertyIterator::hasNext() const
Returns true if there is at least one item ahead of the iterator (i.e. the iterator is not at the back of the property sequence); otherwise returns false.
参见 next() and hasPrevious().
[pure virtual] bool QScriptClassPropertyIterator::hasPrevious() const
Returns true if there is at least one item behind the iterator (i.e. the iterator is not at the front of the property sequence); otherwise returns false.
[virtual] uint QScriptClassPropertyIterator::id() const
Returns the id of the last property that was jumped over using next() or previous().
The default implementation returns 0.
参见 name().
[pure virtual] QScriptString QScriptClassPropertyIterator::name() const
Returns the name of the last property that was jumped over using next() or previous().
参见 id().
[pure virtual] void QScriptClassPropertyIterator::next()
Advances the iterator by one position.
Calling this function on an iterator located at the back of the container leads to undefined results.
参见 hasNext(), previous(), and name().
QScriptValue QScriptClassPropertyIterator::object() const
Returns the Qt Script object this iterator is traversing.
[pure virtual] void QScriptClassPropertyIterator::previous()
Moves the iterator back by one position.
Calling this function on an iterator located at the front of the container leads to undefined results.
参见 hasPrevious(), next(), and name().
[pure virtual] void QScriptClassPropertyIterator::toBack()
Moves the iterator to the back of the QScriptValue (after the last property).
[pure virtual] void QScriptClassPropertyIterator::toFront()
Moves the iterator to the front of the QScriptValue (before the first property).