<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/qptrstack.doc:41 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>TQPtrStack Class</title> <style type="text/css"><!-- 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>TQPtrStack Class Reference</h1> <p>The TQPtrStack class is a template class that provides a stack. <a href="#details">More...</a> <p><tt>#include <<a href="qptrstack-h.html">ntqptrstack.h</a>></tt> <p><a href="qptrstack-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li class=fn><a href="#TQPtrStack"><b>TQPtrStack</b></a> ()</li> <li class=fn><a href="#TQPtrStack-2"><b>TQPtrStack</b></a> ( const TQPtrStack<type> & s )</li> <li class=fn><a href="#~TQPtrStack"><b>~TQPtrStack</b></a> ()</li> <li class=fn>TQPtrStack<type> & <a href="#operator-eq"><b>operator=</b></a> ( const TQPtrStack<type> & s )</li> <li class=fn>bool <a href="#autoDelete"><b>autoDelete</b></a> () const</li> <li class=fn>void <a href="#setAutoDelete"><b>setAutoDelete</b></a> ( bool enable )</li> <li class=fn>uint <a href="#count"><b>count</b></a> () const</li> <li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li> <li class=fn>void <a href="#push"><b>push</b></a> ( const type * d )</li> <li class=fn>type * <a href="#pop"><b>pop</b></a> ()</li> <li class=fn>bool <a href="#remove"><b>remove</b></a> ()</li> <li class=fn>void <a href="#clear"><b>clear</b></a> ()</li> <li class=fn>type * <a href="#top"><b>top</b></a> () const</li> <li class=fn><a href="#operator-type-*"><b>operator type *</b></a> () const</li> <li class=fn>type * <a href="#current"><b>current</b></a> () const</li> </ul> <h2>Protected Members</h2> <ul> <li class=fn>virtual TQDataStream & <a href="#read"><b>read</b></a> ( TQDataStream & s, TQPtrCollection::Item & item )</li> <li class=fn>virtual TQDataStream & <a href="#write"><b>write</b></a> ( TQDataStream & s, TQPtrCollection::Item item ) const</li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> The TQPtrStack class is a template class that provides a stack. <p> <p> <a href="ntqvaluestack.html">TQValueStack</a> is an STL-compatible alternative to this class. <p> Define a template instance TQPtrStack<X> to create a stack that operates on pointers to X, (X*). <p> A stack is a last in, first out (LIFO) structure. Items are added to the top of the stack with <a href="#push">push</a>() and retrieved from the top with <a href="#pop">pop</a>(). Use <a href="#top">top</a>() to get a reference to the top element without changing the stack. <p> You can control the stack's deletion policy with <a href="#setAutoDelete">setAutoDelete</a>(). <p> For compatibility with the <a href="ntqptrcollection.html">TQPtrCollection</a> classes <a href="#current">current</a>() and <a href="#remove">remove</a>() are provided; they both operate on the top(). <p> <p>See also <a href="ntqptrlist.html">TQPtrList</a>, <a href="ntqptrqueue.html">TQPtrQueue</a>, and <a href="tools.html">Non-GUI Classes</a>. <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="TQPtrStack"></a>TQPtrStack::TQPtrStack () </h3> <p> Creates an empty stack. <h3 class=fn><a name="TQPtrStack-2"></a>TQPtrStack::TQPtrStack ( const <a href="ntqptrstack.html">TQPtrStack</a><type> & s ) </h3> <p> Creates a stack by making a <a href="shclass.html#shallow-copy">shallow copy</a> of another stack <em>s</em>. <h3 class=fn><a name="~TQPtrStack"></a>TQPtrStack::~TQPtrStack () </h3> <p> Destroys the stack. All items will be deleted if <a href="#autoDelete">autoDelete</a>() is TRUE. <h3 class=fn>bool <a name="autoDelete"></a>TQPtrStack::autoDelete () const </h3> <p> The same as <a href="ntqptrcollection.html#autoDelete">TQPtrCollection::autoDelete</a>(). <p> <p>See also <a href="#setAutoDelete">setAutoDelete</a>(). <h3 class=fn>void <a name="clear"></a>TQPtrStack::clear () </h3> <p> Removes all items from the stack, deleting them if <a href="#autoDelete">autoDelete</a>() is TRUE. <p> <p>See also <a href="#remove">remove</a>(). <h3 class=fn>uint <a name="count"></a>TQPtrStack::count () const </h3> <p> Returns the number of items in the stack. <p> <p>See also <a href="#isEmpty">isEmpty</a>(). <h3 class=fn>type * <a name="current"></a>TQPtrStack::current () const </h3> <p> Returns a pointer to the top item on the stack (most recently pushed). The stack is not changed. Returns 0 if the stack is empty. <h3 class=fn>bool <a name="isEmpty"></a>TQPtrStack::isEmpty () const </h3> <p> Returns TRUE if the stack contains no elements; otherwise returns FALSE. <h3 class=fn><a name="operator-type-*"></a>TQPtrStack::operator type * () const </h3> <p> Returns a pointer to the top item on the stack (most recently pushed). The stack is not changed. Returns 0 if the stack is empty. <h3 class=fn><a href="ntqptrstack.html">TQPtrStack</a><type> & <a name="operator-eq"></a>TQPtrStack::operator= ( const <a href="ntqptrstack.html">TQPtrStack</a><type> & s ) </h3> <p> Sets the contents of this stack by making a <a href="shclass.html#shallow-copy">shallow copy</a> of another stack <em>s</em>. Elements currently in this stack will be deleted if <a href="#autoDelete">autoDelete</a>() is TRUE. <h3 class=fn>type * <a name="pop"></a>TQPtrStack::pop () </h3> <p> Removes the top item from the stack and returns it. The stack must not be empty. <h3 class=fn>void <a name="push"></a>TQPtrStack::push ( const type * d ) </h3> <p> Adds an element <em>d</em> to the top of the stack. Last in, first out. <h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="read"></a>TQPtrStack::read ( <a href="ntqdatastream.html">TQDataStream</a> & s, <a href="ntqptrcollection.html#Item">TQPtrCollection::Item</a> & item )<tt> [virtual protected]</tt> </h3> <p> Reads a stack item, <em>item</em>, from the stream <em>s</em> and returns a reference to the stream. <p> The default implementation sets <em>item</em> to 0. <p> <p>See also <a href="#write">write</a>(). <h3 class=fn>bool <a name="remove"></a>TQPtrStack::remove () </h3> <p> Removes the top item from the stack and deletes it if <a href="#autoDelete">autoDelete</a>() is TRUE. Returns TRUE if there was an item to pop; otherwise returns FALSE. <p> <p>See also <a href="#clear">clear</a>(). <h3 class=fn>void <a name="setAutoDelete"></a>TQPtrStack::setAutoDelete ( bool enable ) </h3> <p> Defines whether this stack auto-deletes its contents. The same as <a href="ntqptrcollection.html#setAutoDelete">TQPtrCollection::setAutoDelete</a>(). <p> If <em>enable</em> is TRUE the stack auto-deletes its contents; if <em>enable</em> is FALSE the stack does not delete its contents. <p> <p>See also <a href="#autoDelete">autoDelete</a>(). <h3 class=fn>type * <a name="top"></a>TQPtrStack::top () const </h3> <p> Returns a pointer to the top item on the stack (most recently pushed). The stack is not changed. Returns 0 if the stack is empty. <h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="write"></a>TQPtrStack::write ( <a href="ntqdatastream.html">TQDataStream</a> & s, <a href="ntqptrcollection.html#Item">TQPtrCollection::Item</a> item ) const<tt> [virtual protected]</tt> </h3> <p> Writes a stack item, <em>item</em>, to the stream <em>s</em> and returns a reference to the stream. <p> The default implementation does nothing. <p> <p>See also <a href="#read">read</a>(). <!-- eof --> <hr><p> This file is part of the <a href="index.html">TQt toolkit</a>. Copyright © 1995-2007 <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 © 2007 <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> <td align=right><div align=right>TQt 3.3.8</div> </table></div></address></body> </html>