You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
178 lines
9.5 KiB
178 lines
9.5 KiB
<!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/src/tools/tqptrcollection.cpp:40 -->
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
|
<title>TQPtrCollection 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>TQPtrCollection Class Reference</h1>
|
|
|
|
<p>The TQPtrCollection class is the base class of most pointer-based TQt collections.
|
|
<a href="#details">More...</a>
|
|
<p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when TQt is built with thread support.</p>
|
|
<p><tt>#include <<a href="tqptrcollection-h.html">tqptrcollection.h</a>></tt>
|
|
<p>Inherited by <a href="tqasciicache.html">TQAsciiCache</a>, <a href="tqasciidict.html">TQAsciiDict</a>, <a href="tqcache.html">TQCache</a>, <a href="tqdict.html">TQDict</a>, <a href="tqintcache.html">TQIntCache</a>, <a href="tqintdict.html">TQIntDict</a>, <a href="tqptrlist.html">TQPtrList</a>, <a href="tqptrdict.html">TQPtrDict</a>, and <a href="tqptrvector.html">TQPtrVector</a>.
|
|
<p><a href="tqptrcollection-members.html">List of all member functions.</a>
|
|
<h2>Public Members</h2>
|
|
<ul>
|
|
<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>virtual uint <a href="#count"><b>count</b></a> () const = 0</li>
|
|
<li class=fn>virtual void <a href="#clear"><b>clear</b></a> () = 0</li>
|
|
<li class=fn>typedef void * <a href="#Item"><b>Item</b></a></li>
|
|
</ul>
|
|
<h2>Protected Members</h2>
|
|
<ul>
|
|
<li class=fn><a href="#TQPtrCollection"><b>TQPtrCollection</b></a> ()</li>
|
|
<li class=fn><a href="#TQPtrCollection-2"><b>TQPtrCollection</b></a> ( const TQPtrCollection & source )</li>
|
|
<li class=fn>virtual <a href="#~TQPtrCollection"><b>~TQPtrCollection</b></a> ()</li>
|
|
<li class=fn>virtual Item <a href="#newItem"><b>newItem</b></a> ( Item d )</li>
|
|
<li class=fn>virtual void <a href="#deleteItem"><b>deleteItem</b></a> ( Item d ) = 0</li>
|
|
</ul>
|
|
<hr><a name="details"></a><h2>Detailed Description</h2>
|
|
|
|
|
|
|
|
The TQPtrCollection class is the base class of most pointer-based TQt collections.
|
|
<p>
|
|
|
|
<p> The TQPtrCollection class is an abstract base class for the TQt
|
|
<a href="collection.html">collection classes</a> <a href="tqdict.html">TQDict</a>, <a href="tqptrlist.html">TQPtrList</a>,
|
|
etc. TQt also includes value based collections, e.g. <a href="tqvaluelist.html">TQValueList</a>,
|
|
<a href="tqmap.html">TQMap</a>, etc.
|
|
<p> A TQPtrCollection only knows about the number of objects in the
|
|
collection and the deletion strategy (see <a href="#setAutoDelete">setAutoDelete</a>()).
|
|
<p> A collection is implemented using the <a href="#Item">Item</a> (generic collection
|
|
item) type, which is a <tt>void*</tt>. The template classes that create
|
|
the real collections cast the <a href="#Item">Item</a> to the required type.
|
|
<p>See also <a href="collection.html">Collection Classes</a> and <a href="tools.html">Non-GUI Classes</a>.
|
|
|
|
<hr><h2>Member Type Documentation</h2>
|
|
<h3 class=fn><a name="Item"></a>TQPtrCollection::Item</h3>
|
|
|
|
<p> This type is the generic "item" in a TQPtrCollection.
|
|
|
|
<hr><h2>Member Function Documentation</h2>
|
|
<h3 class=fn><a name="TQPtrCollection"></a>TQPtrCollection::TQPtrCollection ()<tt> [protected]</tt>
|
|
</h3>
|
|
|
|
<p> Constructs a collection. The constructor is protected because
|
|
TQPtrCollection is an abstract class.
|
|
|
|
<h3 class=fn><a name="TQPtrCollection-2"></a>TQPtrCollection::TQPtrCollection ( const <a href="tqptrcollection.html">TQPtrCollection</a> & source )<tt> [protected]</tt>
|
|
</h3>
|
|
|
|
<p> Constructs a copy of <em>source</em> with <a href="#autoDelete">autoDelete</a>() set to FALSE. The
|
|
constructor is protected because TQPtrCollection is an abstract
|
|
class.
|
|
<p> Note that if <em>source</em> has autoDelete turned on, copying it will
|
|
risk memory leaks, reading freed memory, or both.
|
|
|
|
<h3 class=fn><a name="~TQPtrCollection"></a>TQPtrCollection::~TQPtrCollection ()<tt> [virtual protected]</tt>
|
|
</h3>
|
|
|
|
<p> Destroys the collection. The destructor is protected because
|
|
TQPtrCollection is an abstract class.
|
|
|
|
<h3 class=fn>bool <a name="autoDelete"></a>TQPtrCollection::autoDelete () const
|
|
</h3>
|
|
|
|
<p> Returns the setting of the auto-delete option. The default is FALSE.
|
|
<p> <p>See also <a href="#setAutoDelete">setAutoDelete</a>().
|
|
|
|
<h3 class=fn>void <a name="clear"></a>TQPtrCollection::clear ()<tt> [pure virtual]</tt>
|
|
</h3>
|
|
|
|
<p> Removes all objects from the collection. The objects will be
|
|
deleted if auto-delete has been enabled.
|
|
<p> <p>See also <a href="#setAutoDelete">setAutoDelete</a>().
|
|
|
|
<p>Reimplemented in <a href="tqasciicache.html#clear">TQAsciiCache</a>, <a href="tqasciidict.html#clear">TQAsciiDict</a>, <a href="tqcache.html#clear">TQCache</a>, <a href="tqdict.html#clear">TQDict</a>, <a href="tqintcache.html#clear">TQIntCache</a>, <a href="tqintdict.html#clear">TQIntDict</a>, <a href="tqptrlist.html#clear">TQPtrList</a>, <a href="tqptrdict.html#clear">TQPtrDict</a>, and <a href="tqptrvector.html#clear">TQPtrVector</a>.
|
|
<h3 class=fn>uint <a name="count"></a>TQPtrCollection::count () const<tt> [pure virtual]</tt>
|
|
</h3>
|
|
|
|
<p> Returns the number of objects in the collection.
|
|
|
|
<p>Reimplemented in <a href="tqasciicache.html#count">TQAsciiCache</a>, <a href="tqasciidict.html#count">TQAsciiDict</a>, <a href="tqcache.html#count">TQCache</a>, <a href="tqdict.html#count">TQDict</a>, <a href="tqintcache.html#count">TQIntCache</a>, <a href="tqintdict.html#count">TQIntDict</a>, <a href="tqptrlist.html#count">TQPtrList</a>, <a href="tqptrdict.html#count">TQPtrDict</a>, and <a href="tqptrvector.html#count">TQPtrVector</a>.
|
|
<h3 class=fn>void <a name="deleteItem"></a>TQPtrCollection::deleteItem ( <a href="tqptrcollection.html#Item">Item</a> d )<tt> [pure virtual protected]</tt>
|
|
</h3>
|
|
|
|
<p> Reimplement this function if you want to be able to delete items.
|
|
<p> Deletes an item that is about to be removed from the collection.
|
|
<p> This function has to reimplemented in the collection template
|
|
classes, and should <em>only</em> delete item <em>d</em> if auto-delete has
|
|
been enabled.
|
|
<p> <b>Warning:</b> If you reimplement this function you must also
|
|
reimplement the destructor and call the virtual function <a href="#clear">clear</a>()
|
|
from your destructor. This is due to the way virtual functions and
|
|
destructors work in C++: Virtual functions in derived classes
|
|
cannot be called from a destructor. If you do not do this, your
|
|
<a href="#deleteItem">deleteItem</a>() function will not be called when the container is
|
|
destroyed.
|
|
<p> <p>See also <a href="#newItem">newItem</a>() and <a href="#setAutoDelete">setAutoDelete</a>().
|
|
|
|
<h3 class=fn><a href="tqptrcollection.html#Item">Item</a> <a name="newItem"></a>TQPtrCollection::newItem ( <a href="tqptrcollection.html#Item">Item</a> d )<tt> [virtual protected]</tt>
|
|
</h3>
|
|
Virtual function that creates a copy of an object that is about to
|
|
be inserted into the collection.
|
|
<p> The default implementation returns the <em>d</em> pointer, i.e. no copy
|
|
is made.
|
|
<p> This function is seldom reimplemented in the collection template
|
|
classes. It is not common practice to make a copy of something
|
|
that is being inserted.
|
|
<p> <p>See also <a href="#deleteItem">deleteItem</a>().
|
|
|
|
<h3 class=fn>void <a name="setAutoDelete"></a>TQPtrCollection::setAutoDelete ( bool enable )
|
|
</h3>
|
|
|
|
<p> Sets the collection to auto-delete its contents if <em>enable</em> is
|
|
TRUE and to never delete them if <em>enable</em> is FALSE.
|
|
<p> If auto-deleting is turned on, all the items in a collection are
|
|
deleted when the collection itself is deleted. This is convenient
|
|
if the collection has the only pointer to the items.
|
|
<p> The default setting is FALSE, for safety. If you turn it on, be
|
|
careful about copying the collection - you might find yourself
|
|
with two collections deleting the same items.
|
|
<p> Note that the auto-delete setting may also affect other functions
|
|
in subclasses. For example, a subclass that has a remove()
|
|
function will remove the item from its data structure, and if
|
|
auto-delete is enabled, will also delete the item.
|
|
<p> <p>See also <a href="#autoDelete">autoDelete</a>().
|
|
|
|
<p>Examples: <a href="scribble-example.html#x924">scribble/scribble.cpp</a> and <a href="bigtable-example.html#x1291">table/bigtable/main.cpp</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>
|