qasciidictiterator.html
来自「QT 下载资料仅供参考」· HTML 代码 · 共 178 行
HTML
178 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/doc/qasciidict.doc:331 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>QAsciiDictIterator Class</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">Home</font></a> | <a href="classes.html"><font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QAsciiDictIterator Class Reference</h1><p>The QAsciiDictIterator class provides an iterator for QAsciiDict collections.<a href="#details">More...</a><p><tt>#include <<a href="qasciidict-h.html">qasciidict.h</a>></tt><p><a href="qasciidictiterator-members.html">List of all member functions.</a><h2>Public Members</h2><ul><li><div class=fn><a href="#QAsciiDictIterator"><b>QAsciiDictIterator</b></a> ( const QAsciiDict<type> & dict )</div></li><li><div class=fn><a href="#~QAsciiDictIterator"><b>~QAsciiDictIterator</b></a> ()</div></li><li><div class=fn>uint <a href="#count"><b>count</b></a> () const</div></li><li><div class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</div></li><li><div class=fn>type * <a href="#toFirst"><b>toFirst</b></a> ()</div></li><li><div class=fn><a href="#operator-type-*"><b>operator type *</b></a> () const</div></li><li><div class=fn>type * <a href="#current"><b>current</b></a> () const</div></li><li><div class=fn>const char * <a href="#currentKey"><b>currentKey</b></a> () const</div></li><li><div class=fn>type * <a href="#operator()"><b>operator()</b></a> ()</div></li><li><div class=fn>type * <a href="#operator++"><b>operator++</b></a> ()</div></li><li><div class=fn>type * <a href="#operator+-eq"><b>operator+=</b></a> ( uint jump )</div></li></ul><hr><a name="details"></a><h2>Detailed Description</h2>The QAsciiDictIterator class provides an iterator for <a href="qasciidict.html">QAsciiDict</a> collections.<p> <p> QAsciiDictIterator is implemented as a template class.Define a template instance QAsciiDictIterator<X> to create adictionary iterator that operates on QAsciiDict<X> (dictionary of X*).<p> Example:<pre> <a href="qasciidict.html">QAsciiDict</a><QLineEdit> fields; fields.<a href="qasciidict.html#insert">insert</a>( "forename", new <a href="qlineedit.html">QLineEdit</a>( this ) ); fields.<a href="qasciidict.html#insert">insert</a>( "surname", new <a href="qlineedit.html">QLineEdit</a>( this ) ); fields.<a href="qasciidict.html#insert">insert</a>( "age", new <a href="qlineedit.html">QLineEdit</a>( this ) ); fields["forename"]->setText( "Homer" ); fields["surname"]->setText( "Simpson" ); fields["age"]->setText( "45" ); QAsciiDictIterator<QLineEdit> it( fields ); for( ; it.<a href="#current">current</a>(); ++it ) cout << it.<a href="#currentKey">currentKey</a>() << ": " << it.<a href="#current">current</a>()->text() << endl; cout << endl; // Output (random order): // age: 45 // surname: Simpson // forename: Homer </pre> In the example we insert some line edits into a dictionary, theniterate over the dictionary printing the strings associated withthose line edits.<p> Note that the traversal order is arbitrary; you are not guaranteed anyparticular order.<p> Multiple iterators may independently traverse the same dictionary. A<a href="qasciidict.html">QAsciiDict</a> knows about all the iterators that are operating on thedictionary. When an item is removed from the dictionary, QAsciiDictupdates all the iterators that are referring the removed item to pointto the next item in the (arbitrary) traversal order.<p> <p>See also <a href="qasciidict.html">QAsciiDict</a>, <a href="collection.html">Collection Classes</a> and <a href="tools.html">Non-GUI Classes</a>.<hr><h2>Member Function Documentation</h2><h3 class=fn><a name="QAsciiDictIterator"></a>QAsciiDictIterator::QAsciiDictIterator ( const <a href="qasciidict.html">QAsciiDict</a><type> & dict )</h3>Constructs an iterator for <em>dict</em>. The current iterator item isset to point on the first item in the <em>dict</em>.<h3 class=fn><a name="~QAsciiDictIterator"></a>QAsciiDictIterator::~QAsciiDictIterator ()</h3>Destroys the iterator.<h3 class=fn>uint <a name="count"></a>QAsciiDictIterator::count () const</h3>Returns the number of items in the dictionary this iterator operatesover.<p>See also <a href="#isEmpty">isEmpty</a>().<h3 class=fn>type * <a name="current"></a>QAsciiDictIterator::current () const</h3>Returns a pointer to the current iterator item.<h3 class=fn>const char * <a name="currentKey"></a>QAsciiDictIterator::currentKey () const</h3>Returns a pointer to the key for the current iterator item.<h3 class=fn>bool <a name="isEmpty"></a>QAsciiDictIterator::isEmpty () const</h3>Returns TRUE if the dictionary is empty, i.e. <a href="#count">count</a>() == 0, otherwisereturns FALSE. <p>See also <a href="#count">count</a>().<h3 class=fn><a name="operator-type-*"></a>QAsciiDictIterator::operator type * () const</h3>Cast operator. Returns a pointer to the current iterator item.Same as <a href="#current">current</a>().<h3 class=fn>type * <a name="operator()"></a>QAsciiDictIterator::operator() ()</h3>Makes the succeeding item current and returns the original current item.<p> If the current iterator item was the last item in the dictionary or if itwas null, null is returned.<h3 class=fn>type * <a name="operator++"></a>QAsciiDictIterator::operator++ ()</h3>Prefix ++ makes the succeeding item current and returns the new currentitem.<p> If the current iterator item was the last item in the dictionary or if itwas null, null is returned.<h3 class=fn>type * <a name="operator+-eq"></a>QAsciiDictIterator::operator+= ( uint jump )</h3>Sets the current item to the item <em>jump</em> positions after the currentitem, and returns a pointer to that item.<p> If that item is beyond the last item or if the dictionary is empty,it sets the current item to null and returns null.<h3 class=fn>type * <a name="toFirst"></a>QAsciiDictIterator::toFirst ()</h3>Sets the current iterator item to point to the first item in thedictionary and returns a pointer to the item.If the dictionary is empty it sets the current item to null andreturns null.<!-- eof --><hr><p>This file is part of the <a href="index.html">Qt toolkit</a>.Copyright © 1995-2002<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?