qchecklistitem.3qt

linux下GUI编程工具qt的在线连接帮助手册

'\" t
.TH QCheckListItem 3qt "11 October 2001" "Trolltech AS" \" -*- nroff -*-
.\" Copyright 1992-2001 Trolltech AS.  All rights reserved.  See the
.\" license file included in the distribution for a complete license
.\" statement.
.\"
.ad l
.nh
.SH NAME
QCheckListItem \- Checkable list view items
.PP
\fC#include <qlistview.h>\fR
.PP
Inherits QListViewItem.
.PP
.SS "Public Members"
.in +1c
.ti -1c
.BI "enum \fBType\fR { RadioButton, CheckBox, Controller }"
.br
.ti -1c
.BI "\fBQCheckListItem\fR ( QCheckListItem * parent, const QString & text, Type tt = Controller )"
.br
.ti -1c
.BI "\fBQCheckListItem\fR ( QListViewItem * parent, const QString & text, Type tt = Controller )"
.br
.ti -1c
.BI "\fBQCheckListItem\fR ( QListView * parent, const QString & text, Type tt = Controller )"
.br
.ti -1c
.BI "\fBQCheckListItem\fR ( QListViewItem * parent, const QString & text, const QPixmap & p )"
.br
.ti -1c
.BI "\fBQCheckListItem\fR ( QListView * parent, const QString & text, const QPixmap & p )"
.br
.ti -1c
.BI "\fB~QCheckListItem\fR ()"
.br
.ti -1c
.BI "virtual void \fBpaintCell\fR ( QPainter * p, const QColorGroup & cg, int column, int width, int align )"
.br
.ti -1c
.BI "virtual void \fBpaintFocus\fR ( QPainter * p, const QColorGroup & cg, const QRect & r )"
.br
.ti -1c
.BI "virtual void \fBsetOn\fR ( bool b )"
.br
.ti -1c
.BI "bool \fBisOn\fR () const"
.br
.ti -1c
.BI "Type \fBtype\fR () const"
.br
.ti -1c
.BI "QString \fBtext\fR () const"
.br
.ti -1c
.BI "virtual int \fBrtti\fR () const"
.br
.in -1c
.SS "Protected Members"
.in +1c
.ti -1c
.BI "virtual void \fBactivate\fR ()"
.br
.ti -1c
.BI "void \fBturnOffChild\fR ()"
.br
.ti -1c
.BI "virtual void \fBstateChange\fR ( bool )"
.br
.in -1c
.SH DESCRIPTION
The QCheckListItem class provides checkable list view items.
.PP
There are three types of check list items: checkboxes, radio buttons and controllers.
.PP
Checkboxes may be inserted at the top level in the list view. A radio button must be the child of a controller.
.PP
The item can be checked or unchecked with setOn(). Its type can be retrieved with type() and its text retrieved with text().
.PP
See also Advanced Widgets.
.SS "Member Type Documentation"
.SH "QCheckListItem::Type"
This enum type specifies a QCheckListItem's type:
.TP
\fCQCheckListItem::RadioButton\fR
.TP
\fCQCheckListItem::CheckBox\fR
.TP
\fCQCheckListItem::Controller\fR
.SH MEMBER FUNCTION DOCUMENTATION
.SH "QCheckListItem::QCheckListItem ( QCheckListItem * parent, const QString & text, Type tt = Controller )"
Constructs a checkable item with parent \fIparent\fR, text \fItext\fR and type \fItt\fR. Note that a RadioButton must be the child of a Controller, otherwise it will not toggle.
.SH "QCheckListItem::QCheckListItem ( QListViewItem * parent, const QString & text, Type tt = Controller )"
Constructs a checkable item with parent \fIparent\fR, text \fItext\fR and type \fItt\fR. Note that this item must \fInot\fR be a RadioButton. Radio buttons must be children of a Controller.
.SH "QCheckListItem::QCheckListItem ( QListView * parent, const QString & text, Type tt = Controller )"
Constructs a checkable item with parent \fIparent\fR, text \fItext\fR and type \fItt\fR. Note that \fItt\fR must \fInot\fR be RadioButton. Radio buttons must be children of a Controller.
.SH "QCheckListItem::QCheckListItem ( QListViewItem * parent, const QString & text, const QPixmap & p )"
Constructs a Controller item with parent \fIparent\fR, text \fItext\fR and pixmap \fIp\fR.
.SH "QCheckListItem::QCheckListItem ( QListView * parent, const QString & text, const QPixmap & p )"
Constructs a Controller item with parent \fIparent\fR, text \fItext\fR and pixmap \fIp\fR.
.SH "QCheckListItem::~QCheckListItem ()"
Destroys the item, deleting all its children, freeing up all allocated resources.
.SH "void QCheckListItem::activate ()\fC [virtual protected]\fR"
Toggle check box or set radio button to on.
.PP
Reimplemented from QListViewItem.
.SH "bool QCheckListItem::isOn () const"
Returns TRUE if the item is toggled on; otherwise returns FALSE.
.SH "void QCheckListItem::paintCell ( QPainter * p, const QColorGroup & cg, int column, int width, int align )\fC [virtual]\fR"
Paints the item using the painter \fIp\fR and the color group \fIcg\fR. The item is in column \fIcolumn\fR, has width \fIwidth\fR and is aligned \fIalign\fR. (See Qt::AlignmentFlags for valid alignments.)
.PP
Reimplemented from QListViewItem.
.SH "void QCheckListItem::paintFocus ( QPainter * p, const QColorGroup & cg, const QRect & r )\fC [virtual]\fR"
Draws the focus rectangle \fIr\fR using the color group \fIcg\fR on the painter \fIp\fR.
.PP
Reimplemented from QListViewItem.
.SH "int QCheckListItem::rtti () const\fC [virtual]\fR"
Returns 1.
.PP
Make your derived classes return their own values for rtti(), and you can distinguish between listview items. You should use values greater than 1000 preferably a large random number, to allow for extensions to this class.
.PP
Reimplemented from QListViewItem.
.SH "void QCheckListItem::setOn ( bool b )\fC [virtual]\fR"
Sets the button on if \fIb\fR is TRUE, otherwise sets it off. Maintains radio button exclusivity.
.SH "void QCheckListItem::stateChange ( bool )\fC [virtual protected]\fR"
This virtual function is called when the item changes its on/off state.
.SH "QString QCheckListItem::text () const"
Returns the text of the item.
.SH "void QCheckListItem::turnOffChild ()\fC [protected]\fR"
If this is a Controller that has RadioButton children, turn off the child that is on.
.SH "Type QCheckListItem::type () const"
Returns the type of this item.

.SH "SEE ALSO"
.BR http://doc.trolltech.com/qchecklistitem.html
.BR http://www.trolltech.com/faq/tech.html
.SH COPYRIGHT
Copyright 1992-2001 Trolltech AS, http://www.trolltech.com.  See the
license file included in the distribution for a complete license
statement.
.SH AUTHOR
Generated automatically from the source code.
.SH BUGS
If you find a bug in Qt, please report it as described in
.BR http://doc.trolltech.com/bughowto.html .
Good bug reports help us to help you. Thank you.
.P
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. 
.P
If you find errors in this manual page, please report them to
.BR [e-mail] .
Please include the name of the manual page (qchecklistitem.3qt) and the Qt
version (3.0.0).