1QCloseEvent(3qt)                                              QCloseEvent(3qt)
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NAME

6       QCloseEvent - Parameters that describe a close event
7

SYNOPSIS

9       #include <qevent.h>
10
11       Inherits QEvent.
12
13   Public Members
14       QCloseEvent ()
15       bool isAccepted () const
16       void accept ()
17       void ignore ()
18

DESCRIPTION

20       The QCloseEvent class contains parameters that describe a close event.
21
22       Close events are sent to widgets that the user wants to close, usually
23       by choosing "Close" from the window menu, or by clicking the `X'
24       titlebar button. They are also sent when you call QWidget::close() to
25       close a widget programmatically.
26
27       Close events contain a flag that indicates whether the receiver wants
28       the widget to be closed or not. When a widget accepts the close event,
29       it is hidden (and destroyed if it was created with the
30       WDestructiveClose flag). If it refuses to accept the close event
31       nothing happens. (Under X11 it is possible that the window manager will
32       forcibly close the window; but at the time of writing we are not aware
33       of any window manager that does this.)
34
35       The application's main widget -- QApplication::mainWidget() -- is a
36       special case. When it accepts the close event, Qt leaves the main event
37       loop and the application is immediately terminated (i.e. it returns
38       from the call to QApplication::exec() in the main() function).
39
40       The event handler QWidget::closeEvent() receives close events. The
41       default implementation of this event handler accepts the close event.
42       If you do not want your widget to be hidden, or want some special
43       handing, you should reimplement the event handler.
44
45       The closeEvent() in the Application Walkthrough shows a close event
46       handler that asks whether to save a document before closing.
47
48       If you want the widget to be deleted when it is closed, create it with
49       the WDestructiveClose widget flag. This is very useful for independent
50       top-level windows in a multi-window application.
51
52       QObjects emits the destroyed() signal when they are deleted.
53
54       If the last top-level window is closed, the
55       QApplication::lastWindowClosed() signal is emitted.
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57       The isAccepted() function returns TRUE if the event's receiver has
58       agreed to close the widget; call accept() to agree to close the widget
59       and call ignore() if the receiver of this event does not want the
60       widget to be closed.
61
62       See also QWidget::close(), QWidget::hide(), QObject::destroyed(),
63       QApplication::setMainWidget(), QApplication::lastWindowClosed(),
64       QApplication::exec(), QApplication::quit(), and Event Classes.
65

MEMBER FUNCTION DOCUMENTATION

QCloseEvent::QCloseEvent ()
68       Constructs a close event object with the accept parameter flag set to
69       FALSE.
70
71       See also accept().
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void QCloseEvent::accept ()
74       Sets the accept flag of the close event object.
75
76       Setting the accept flag indicates that the receiver of this event
77       agrees to close the widget.
78
79       The accept flag is not set by default.
80
81       If you choose to accept in QWidget::closeEvent(), the widget will be
82       hidden. If the widget's WDestructiveClose flag is set, it will also be
83       destroyed.
84
85       See also ignore() and QWidget::hide().
86
87       Examples:
88

void QCloseEvent::ignore ()
90       Clears the accept flag of the close event object.
91
92       Clearing the accept flag indicates that the receiver of this event does
93       not want the widget to be closed.
94
95       The close event is constructed with the accept flag cleared.
96
97       See also accept().
98
99       Examples:
100

bool QCloseEvent::isAccepted () const
102       Returns TRUE if the receiver of the event has agreed to close the
103       widget; otherwise returns FALSE.
104
105       See also accept() and ignore().
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107

SEE ALSO
109       http://doc.trolltech.com/qcloseevent.html
110       http://www.trolltech.com/faq/tech.html
111

113       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the
114       license file included in the distribution for a complete license
115       statement.
116

AUTHOR
118       Generated automatically from the source code.
119

BUGS
121       If you find a bug in Qt, please report it as described in
122       http://doc.trolltech.com/bughowto.html.  Good bug reports help us to
123       help you. Thank you.
124
125       The definitive Qt documentation is provided in HTML format; it is
126       located at $QTDIR/doc/html and can be read using Qt Assistant or with a
127       web browser. This man page is provided as a convenience for those users
128       who prefer man pages, although this format is not officially supported
129       by Trolltech.
130
131       If you find errors in this manual page, please report them to qt-
132       bugs@trolltech.com.  Please include the name of the manual page
133       (qcloseevent.3qt) and the Qt version (3.3.8).
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137Trolltech AS                    2 February 2007               QCloseEvent(3qt)



        

    


            
        

        

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