qlayoutiterator man page on Peanut

Man page or keyword search:  
man Server   7435 pages
apropos Keyword Search (all sections)
Output format
Peanut logo
[printable version]

QLayoutIterator(3qt)					  QLayoutIterator(3qt)

NAME
       QLayoutIterator - Iterators over QLayoutItem

SYNOPSIS
       #include <qlayout.h>

   Public Members
       QLayoutIterator ( QGLayoutIterator * gi )
       QLayoutIterator ( const QLayoutIterator & i )
       ~QLayoutIterator ()
       QLayoutIterator & operator= ( const QLayoutIterator & i )
       QLayoutItem * operator++ ()
       QLayoutItem * current ()
       QLayoutItem * takeCurrent ()
       void deleteCurrent ()

DESCRIPTION
       The QLayoutIterator class provides iterators over QLayoutItem.

       Use QLayoutItem::iterator() to create an iterator over a layout.

       QLayoutIterator uses explicit sharing with a reference count. If an
       iterator is copied and one of the copies is modified, both iterators
       will be modified.

       A QLayoutIterator is not protected against changes in its layout. If
       the layout is modified or deleted the iterator will become invalid. It
       is not possible to test for validity. It is safe to delete an invalid
       layout; any other access may lead to an illegal memory reference and
       the abnormal termination of the program.

       Calling takeCurrent() or deleteCurrent() leaves the iterator in a valid
       state, but may invalidate any other iterators that access the same
       layout.

       The following code will draw a rectangle for each layout item in the
       layout structure of the widget.

	   static void paintLayout( QPainter *p, QLayoutItem *lay )
	   {
	       QLayoutIterator it = lay->iterator();
	       QLayoutItem *child;
	       while ( (child = it.current()) != 0 ) {
		   paintLayout( p, child );
		   ++it;
	       }
	       p->drawRect( lay->geometry() );
	   }
	   void ExampleWidget::paintEvent( QPaintEvent * )
	   {
	       QPainter p( this );
	       if ( layout() )
		   paintLayout( &p, layout() );
	   }

       All the functionality of QLayoutIterator is implemented by subclasses
       of QGLayoutIterator. QLayoutIterator itself is not designed to be
       subclassed.

       See also Widget Appearance and Style and Layout Management.

MEMBER FUNCTION DOCUMENTATION
QLayoutIterator::QLayoutIterator ( QGLayoutIterator * gi )
       Constructs an iterator based on gi. The constructed iterator takes
       ownership of gi and will delete it.

       This constructor is provided for layout implementors. Application
       programmers should use QLayoutItem::iterator() to create an iterator
       over a layout.

QLayoutIterator::QLayoutIterator ( const QLayoutIterator & i )
       Creates a shallow copy of i, i.e. if the copy is modified, then the
       original will also be modified.

QLayoutIterator::~QLayoutIterator ()
       Destroys the iterator.

QLayoutItem * QLayoutIterator::current ()
       Returns the current item, or 0 if there is no current item.

void QLayoutIterator::deleteCurrent ()
       Removes and deletes the current child item from the layout and moves
       the iterator to the next item. This iterator will still be valid, but
       any other iterator over the same layout may become invalid.

QLayoutItem * QLayoutIterator::operator++ ()
       Moves the iterator to the next child item and returns that item, or 0
       if there is no such item.

QLayoutIterator & QLayoutIterator::operator= ( const QLayoutIterator & i )
       Assigns i to this iterator and returns a reference to this iterator.

QLayoutItem * QLayoutIterator::takeCurrent ()
       Removes the current child item from the layout without deleting it, and
       moves the iterator to the next item. Returns the removed item, or 0 if
       there was no item to be removed. This iterator will still be valid, but
       any other iterator over the same layout may become invalid.

SEE ALSO
       http://doc.trolltech.com/qlayoutiterator.html
       http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the
       license file included in the distribution for a complete license
       statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to
       help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is
       located at $QTDIR/doc/html and can be read using Qt Assistant or with a
       web browser. This man page is provided as a convenience for those users
       who prefer man pages, although this format is not officially supported
       by Trolltech.

       If you find errors in this manual page, please report them to qt-
       bugs@trolltech.com.  Please include the name of the manual page
       (qlayoutiterator.3qt) and the Qt version (3.3.8).

Trolltech AS			2 February 2007		  QLayoutIterator(3qt)
[top]

List of man pages available for Peanut

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net