The QTreeWidgetItemIterator class provides a way to iterate over the items in a QTreeWidget instance. More...

Public Typedefs
using	IteratorFlags = QFlags< IteratorFlag >

Public Types
enum	IteratorFlag

Public Methods
	QTreeWidgetItemIterator (const QTreeWidgetItemIterator &iter)

	QTreeWidgetItemIterator (QTreeWidget *widget, IteratorFlags flags=All)

	QTreeWidgetItemIterator (QTreeWidgetItem *item, IteratorFlags flags=All)

	~QTreeWidgetItemIterator ()

QTreeWidgetItem *	operator* () const

QTreeWidgetItemIterator &	operator++ ()

const QTreeWidgetItemIterator	operator++ (int)

QTreeWidgetItemIterator &	operator+= (size_type n)

QTreeWidgetItemIterator &	operator-- ()

const QTreeWidgetItemIterator	operator-- (int)

QTreeWidgetItemIterator &	operator-= (size_type n)

QTreeWidgetItemIterator &	operator= (const QTreeWidgetItemIterator &it)

Detailed Description

The QTreeWidgetItemIterator class provides a way to iterate over the items in a QTreeWidget instance. The iterator will walk the items in a pre-order traversal order, thus visiting the parent node before it continues to the child nodes.

The following code examples each item in a tree, checking the text in the first column against a user-specified search string:

QTreeWidgetItemIterator iter(treeWidget);
 
while (*iter) {
   if ((*iter)->text(0) == itemText) {
      (*iter)->setSelected(true);
   }
 
   ++iter;
}

It is also possible to filter out certain types of node by passing certain flags to the constructor of QTreeWidgetItemIterator.

See also: QTreeWidget, QTreeWidgetItem, Model/View Architecture

Member Typedef Documentation

QTreeWidgetItemIterator::IteratorFlags

Typedef for QFlags<IteratorFlag> which contains an OR combination of IteratorFlag values.

Refer to QTreeWidgetItemIterator::IteratorFlag for the enum documentation.

Member Enumeration Documentation

enum QTreeWidgetItemIterator::IteratorFlag

These flags can be passed to a QTreeWidgetItemIterator constructor (OR-ed together if more than one is used), so that the iterator will only iterate over items that match the given flags.

Constant	Value
`QTreeWidgetItemIterator::All`	`0x00000000`
`QTreeWidgetItemIterator::Hidden`	`0x00000001`
`QTreeWidgetItemIterator::NotHidden`	`0x00000002`
`QTreeWidgetItemIterator::Selected`	`0x00000004`
`QTreeWidgetItemIterator::Unselected`	`0x00000008`
`QTreeWidgetItemIterator::Selectable`	`0x00000010`
`QTreeWidgetItemIterator::NotSelectable`	`0x00000020`
`QTreeWidgetItemIterator::DragEnabled`	`0x00000040`
`QTreeWidgetItemIterator::DragDisabled`	`0x00000080`
`QTreeWidgetItemIterator::DropEnabled`	`0x00000100`
`QTreeWidgetItemIterator::DropDisabled`	`0x00000200`
`QTreeWidgetItemIterator::HasChildren`	`0x00000400`
`QTreeWidgetItemIterator::NoChildren`	`0x00000800`
`QTreeWidgetItemIterator::Checked`	`0x00001000`
`QTreeWidgetItemIterator::NotChecked`	`0x00002000`
`QTreeWidgetItemIterator::Enabled`	`0x00004000`
`QTreeWidgetItemIterator::Disabled`	`0x00008000`
`QTreeWidgetItemIterator::Editable`	`0x00010000`
`QTreeWidgetItemIterator::NotEditable`	`0x00020000`
`QTreeWidgetItemIterator::UserFlag`	`0x01000000`

Constructor & Destructor Documentation

QTreeWidgetItemIterator::QTreeWidgetItemIterator ( const QTreeWidgetItemIterator & iter )

Constructs an iterator for the same QTreeWidget as iter. The current iterator item is set to point on the current item of it.

QTreeWidgetItemIterator::QTreeWidgetItemIterator	(	QTreeWidget *	widget,
		IteratorFlags	flags = `All`
	)

explicit

Constructs an iterator for the given widget that uses the specified flags to determine which items are found during iteration. The iterator is set to point to the first top-level item contained in the widget, or the next matching item if the top-level item does not match the flags.

See also: QTreeWidgetItemIterator::IteratorFlag

QTreeWidgetItemIterator::QTreeWidgetItemIterator	(	QTreeWidgetItem *	item,
		IteratorFlags	flags = `All`
	)

explicit

Constructs an iterator for the given item that uses the specified flags to determine which items are found during iteration. The iterator is set to point to item, or the next matching item if item does not match the flags.

See also: QTreeWidgetItemIterator::IteratorFlag

QTreeWidgetItemIterator::~QTreeWidgetItemIterator ( )

Destroys the iterator.

Method Documentation

QTreeWidgetItem * QTreeWidgetItemIterator::operator* ( ) const

inline

Dereference operator. Returns a pointer to the current item.

QTreeWidgetItemIterator & QTreeWidgetItemIterator::operator++ ( )

The prefix ++ operator (++it) advances the iterator to the next matching item and returns a reference to the resulting iterator. Sets the current pointer to 0 if the current item is the last matching item.

const QTreeWidgetItemIterator QTreeWidgetItemIterator::operator++ ( int )

inline

The postfix ++ operator (it++) advances the iterator to the next matching item and returns an iterator to the previously current item.

QTreeWidgetItemIterator & QTreeWidgetItemIterator::operator+= ( size_type n )

inline

Makes the iterator go forward by n matching items. If n is negative the iterator goes backward.

If the current item is beyond the last item, the current item pointer is set to 0. Returns the resulting iterator.

QTreeWidgetItemIterator & QTreeWidgetItemIterator::operator-- ( )

The prefix – operator (–it) advances the iterator to the previous matching item and returns a reference to the resulting iterator. Sets the current pointer to 0 if the current item is the first matching item.

const QTreeWidgetItemIterator QTreeWidgetItemIterator::operator-- ( int )

inline

The postfix – operator (it–) makes the preceding matching item current and returns an iterator to the previously current item.

QTreeWidgetItemIterator & QTreeWidgetItemIterator::operator-= ( size_type n )

inline

Makes the iterator go backward by n matching items. If n is negative the iterator goes forward.

If the current item is ahead of the last item, the current item pointer is set to 0. Returns the resulting iterator.

QTreeWidgetItemIterator & QTreeWidgetItemIterator::operator= ( const QTreeWidgetItemIterator & it )

Assignment. Makes a copy of it and returns a reference to its iterator.

Public Typedefs

Public Types

Public Methods

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Method Documentation