QFocusData(3qt)QFocusData(3qt)NAME
QFocusData - Maintains the list of widgets which can take
focus
#include <qfocusdata.h>
Public Members
QWidget* focusWidget () const
QWidget* home ()
QWidget* next ()
QWidget* prev ()
int count () const
DESCRIPTION
Maintains the list of widgets which can take focus.
This read-only list always contains at least one widget
(the top-level widget, actually). It provides a simple
cursor, which can be reset to the current focus widget
using home(), or moved to its neighboring widgets using
next() and prev(), and a count() of widgets in the list.
Note that some widgets in the list may not accept focus.
Widgets are added to the list as necessary, but not
removed from it. This lets widgets change focus policy
dynamically without disrupting the focus chain the user
sees: When a widget disables and re-enables tab focus, its
position in the focus chain does not change.
When reimplementing QWidget::focusNextPrevChild() to
provide special focus flow, you will usually call
QWidget::focusData() to retrieve the focus data stored at
the top-level widget - the focus data for that hierarchy
of widgets.
The cursor may change at any time; this class is not
thread-safe.
See also QWidget::focusNextPrevChild(),
QWidget::setTabOrder() and QWidget::setFocusPolicy().
MEMBER FUNCTION DOCUMENTATIONint QFocusData::count () const
Returns a count of the number of widgets in the hierarchy
which accept focus.
QWidget* QFocusData::focusWidget () const
Returns the widgets in the hierarchy which currently has
focus.
QWidget* QFocusData::home ()
Moves the cursor to the focusWidget() and returns that
widget. You must call this before next() or prev() to
Trolltech AS 13 June 2001 1
QFocusData(3qt)QFocusData(3qt)
iterate meaningfully.
QWidget* QFocusData::next ()
Moves the cursor to the right. Note that the focus widgets
are a loop of widgets. If you keep calling next(), it will
loop, without ever returning 0.
QWidget* QFocusData::prev ()
Moves the cursor to the left. Note that the focus widgets
are a loop of widgets. If you keep calling prev(), it
will loop, without ever returning 0.
SEE ALSO
http://doc.trolltech.com/qfocusdata.html
http://www.trolltech.com/faq/tech.html
COPYRIGHT
Copyright 1992-2001 Trolltech AS,
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
make our job much simpler. Thank you.
In case of content or formattting problems with this
manual page, please report them to qt-bugs@trolltech.com.
Please include the name of the manual page
(qfocusdata.3qt) and the Qt version (2.3.1).
Trolltech AS 13 June 2001 2
