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394 lines
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394 lines
20 KiB
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQPtrVector Class Reference</h1>
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<p>The TQPtrVector class is a template collection class that
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provides a vector (array).
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qptrvector-h.html">ntqptrvector.h</a>></tt>
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<p>Inherits <a href="ntqptrcollection.html">TQPtrCollection</a>.
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<p><a href="qptrvector-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQPtrVector"><b>TQPtrVector</b></a> ()</li>
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<li class=fn><a href="#TQPtrVector-2"><b>TQPtrVector</b></a> ( uint size )</li>
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<li class=fn><a href="#TQPtrVector-3"><b>TQPtrVector</b></a> ( const TQPtrVector<type> & v )</li>
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<li class=fn><a href="#~TQPtrVector"><b>~TQPtrVector</b></a> ()</li>
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<li class=fn>TQPtrVector<type> & <a href="#operator-eq"><b>operator=</b></a> ( const TQPtrVector<type> & v )</li>
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<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const TQPtrVector<type> & v ) const</li>
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<li class=fn>type ** <a href="#data"><b>data</b></a> () const</li>
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<li class=fn>uint <a href="#size"><b>size</b></a> () const</li>
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<li class=fn>virtual uint <a href="#count"><b>count</b></a> () const</li>
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<li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li>
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<li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li>
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<li class=fn>bool <a href="#resize"><b>resize</b></a> ( uint size )</li>
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<li class=fn>bool <a href="#insert"><b>insert</b></a> ( uint i, const type * d )</li>
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<li class=fn>bool <a href="#remove"><b>remove</b></a> ( uint i )</li>
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<li class=fn>type * <a href="#take"><b>take</b></a> ( uint i )</li>
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<li class=fn>virtual void <a href="#clear"><b>clear</b></a> ()</li>
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<li class=fn>bool <a href="#fill"><b>fill</b></a> ( const type * d, int size = -1 )</li>
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<li class=fn>void <a href="#sort"><b>sort</b></a> ()</li>
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<li class=fn>int <a href="#bsearch"><b>bsearch</b></a> ( const type * d ) const</li>
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<li class=fn>int <a href="#findRef"><b>findRef</b></a> ( const type * d, uint i = 0 ) const</li>
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<li class=fn>int <a href="#find"><b>find</b></a> ( const type * d, uint i = 0 ) const</li>
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<li class=fn>uint <a href="#containsRef"><b>containsRef</b></a> ( const type * d ) const</li>
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<li class=fn>uint <a href="#contains"><b>contains</b></a> ( const type * d ) const</li>
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<li class=fn>type * <a href="#operator[]"><b>operator[]</b></a> ( int i ) const</li>
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<li class=fn>type * <a href="#at"><b>at</b></a> ( uint i ) const</li>
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</ul>
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<h2>Important Inherited Members</h2>
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<ul>
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<li class=fn>bool <a href="#autoDelete"><b>autoDelete</b></a> () const</li>
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<li class=fn>void <a href="#setAutoDelete"><b>setAutoDelete</b></a> ( bool enable )</li>
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</ul>
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<h2>Protected Members</h2>
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<ul>
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<li class=fn>virtual int <a href="#compareItems"><b>compareItems</b></a> ( TQPtrCollection::Item d1, TQPtrCollection::Item d2 )</li>
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<li class=fn>virtual TQDataStream & <a href="#read"><b>read</b></a> ( TQDataStream & s, TQPtrCollection::Item & item )</li>
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<li class=fn>virtual TQDataStream & <a href="#write"><b>write</b></a> ( TQDataStream & s, TQPtrCollection::Item item ) const</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQPtrVector class is a template collection class that
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provides a vector (array).
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<p>
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<p>
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<p> <a href="ntqvaluevector.html">TQValueVector</a> is an STL-compatible alternative to this class.
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<p> TQPtrVector is implemented as a template class. Defines a template
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instance TQPtrVector<X> to create a vector that contains pointers
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to X (X*).
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<p> A vector is the same as an array. The main difference between
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TQPtrVector and <a href="ntqmemarray.html">TQMemArray</a> is that TQPtrVector stores pointers to the
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elements, whereas TQMemArray stores the elements themselves (i.e.
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TQMemArray is value-based and TQPtrVector is pointer-based).
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<p> Items are added to the vector using <a href="#insert">insert</a>() or <a href="#fill">fill</a>(). Items are
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removed with <a href="#remove">remove</a>(). You can get a pointer to an item at a
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particular index position using <a href="#at">at</a>().
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<p> Unless otherwise stated, all functions that remove items from the
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vector will also delete the element pointed to if <a href="ntqptrcollection.html#setAutoDelete">auto-deletion</a> is enabled. By default,
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auto-deletion is disabled; see <a href="ntqptrcollection.html#setAutoDelete">setAutoDelete</a>(). This behaviour can
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be changed in a subclass by reimplementing the virtual function
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<a href="ntqptrcollection.html#deleteItem">deleteItem</a>().
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<p> Functions that compare items (<a href="#find">find</a>() and <a href="#sort">sort</a>() for example) will
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do so using the virtual function <a href="#compareItems">compareItems</a>(). The default
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implementation of this function only compares the pointer values.
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Reimplement compareItems() in a subclass to get searching and
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sorting based on the item contents. You can perform a linear
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search for a pointer in the vector using <a href="#findRef">findRef</a>(), or a binary
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search (of a sorted vector) using <a href="#bsearch">bsearch</a>(). You can count the
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number of times an item appears in the vector with <a href="#contains">contains</a>() or
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<a href="#containsRef">containsRef</a>().
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<p> <p>See also <a href="ntqmemarray.html">TQMemArray</a> and <a href="tools.html">Non-GUI Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQPtrVector"></a>TQPtrVector::TQPtrVector ()
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</h3>
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<p> Constructs a null vector.
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<p> <p>See also <a href="#isNull">isNull</a>().
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<h3 class=fn><a name="TQPtrVector-2"></a>TQPtrVector::TQPtrVector ( uint size )
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</h3>
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<p> Constructs an vector with room for <em>size</em> items. Makes a null
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vector if <em>size</em> == 0.
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<p> All <em>size</em> positions in the vector are initialized to 0.
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<p> <p>See also <a href="#size">size</a>(), <a href="#resize">resize</a>(), and <a href="#isNull">isNull</a>().
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<h3 class=fn><a name="TQPtrVector-3"></a>TQPtrVector::TQPtrVector ( const <a href="ntqptrvector.html">TQPtrVector</a><type> & v )
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</h3>
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<p> Constructs a copy of <em>v</em>. Only the pointers are copied (i.e.
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<a href="shclass.html#shallow-copy">shallow copy</a>).
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<h3 class=fn><a name="~TQPtrVector"></a>TQPtrVector::~TQPtrVector ()
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</h3>
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<p> Removes all items from the vector, and destroys the vector itself.
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<p> <p>See also <a href="#clear">clear</a>().
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<h3 class=fn>type * <a name="at"></a>TQPtrVector::at ( uint i ) const
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</h3>
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<p> Returns the item at position <em>i</em>, or 0 if there is no item at
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that position. <em>i</em> must be less than <a href="#size">size</a>().
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<h3 class=fn>bool <a name="autoDelete"></a>TQPtrCollection::autoDelete () const
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</h3>
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<p> Returns the setting of the auto-delete option. The default is FALSE.
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<p> <p>See also <a href="ntqptrcollection.html#setAutoDelete">setAutoDelete</a>().
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<h3 class=fn>int <a name="bsearch"></a>TQPtrVector::bsearch ( const type * d ) const
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</h3>
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<p> In a sorted array, finds the first occurrence of <em>d</em> using a
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binary search. For a sorted array, this is generally much faster
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than <a href="#find">find</a>(), which performs a linear search.
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<p> Returns the position of <em>d</em>, or -1 if <em>d</em> could not be found. <em>d</em> must not be 0.
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<p> Compares items using the virtual function <a href="#compareItems">compareItems</a>().
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<p> <p>See also <a href="#sort">sort</a>() and <a href="#find">find</a>().
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<h3 class=fn>void <a name="clear"></a>TQPtrVector::clear ()<tt> [virtual]</tt>
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</h3>
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<p> Removes all items from the vector, and destroys the vector itself.
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<p> The vector becomes a null vector.
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<p> <p>See also <a href="#isNull">isNull</a>().
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<p>Reimplemented from <a href="ntqptrcollection.html#clear">TQPtrCollection</a>.
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<h3 class=fn>int <a name="compareItems"></a>TQPtrVector::compareItems ( <a href="ntqptrcollection.html#Item">TQPtrCollection::Item</a> d1, <a href="ntqptrcollection.html#Item">TQPtrCollection::Item</a> d2 )<tt> [virtual protected]</tt>
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</h3>
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<p> This virtual function compares two list items.
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<p> Returns:
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<ul>
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<li> zero if <em>d1</em> == <em>d2</em>
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<li> nonzero if <em>d1</em> != <em>d2</em>
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</ul>
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<p> This function returns <em>int</em> rather than <em>bool</em> so that
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reimplementations can return one of three values and use it to
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sort by:
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<ul>
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<li> 0 if <em>d1</em> == <em>d2</em>
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<li> > 0 (positive integer) if <em>d1</em> > <em>d2</em>
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<li> < 0 (negative integer) if <em>d1</em> < <em>d2</em>
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</ul>
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<p> The <a href="#sort">sort</a>() and <a href="#bsearch">bsearch</a>() functions require <a href="#compareItems">compareItems</a>() to be
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implemented as described here.
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<p> This function should not modify the vector because some const
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functions call compareItems().
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<h3 class=fn>uint <a name="contains"></a>TQPtrVector::contains ( const type * d ) const
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</h3>
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<p> Returns the number of occurrences of item <em>d</em> in the vector.
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<p> Compares items using the virtual function <a href="#compareItems">compareItems</a>().
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<p> <p>See also <a href="#containsRef">containsRef</a>().
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<h3 class=fn>uint <a name="containsRef"></a>TQPtrVector::containsRef ( const type * d ) const
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</h3>
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<p> Returns the number of occurrences of the item pointer <em>d</em> in the
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vector.
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<p> This function does <em>not</em> use <a href="#compareItems">compareItems</a>() to compare items.
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<p> <p>See also <a href="#findRef">findRef</a>().
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<h3 class=fn>uint <a name="count"></a>TQPtrVector::count () const<tt> [virtual]</tt>
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</h3>
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<p> Returns the number of items in the vector. The vector is empty if
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<a href="#count">count</a>() == 0.
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<p> <p>See also <a href="#isEmpty">isEmpty</a>(), <a href="#size">size</a>(), and <a href="#isNull">isNull</a>().
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<p>Reimplemented from <a href="ntqptrcollection.html#count">TQPtrCollection</a>.
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<h3 class=fn>type ** <a name="data"></a>TQPtrVector::data () const
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</h3>
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<p> Returns a pointer to the actual vector data, which is an array of
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type*.
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<p> The vector is a null vector if <a href="#data">data</a>() == 0 (null pointer).
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<p> <p>See also <a href="#isNull">isNull</a>().
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<h3 class=fn>bool <a name="fill"></a>TQPtrVector::fill ( const type * d, int size = -1 )
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</h3>
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<p> Inserts item <em>d</em> in all positions in the vector. Any existing
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items are removed. If <em>d</em> is 0, the vector becomes empty.
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<p> If <em>size</em> >= 0, the vector is first resized to <em>size</em>. By
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default, <em>size</em> is -1.
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<p> Returns TRUE if successful, i.e. <em>size</em> is the same as the
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current size, or <em>size</em> is larger and the memory has successfully
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been allocated; otherwise returns FALSE.
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<p> <p>See also <a href="#resize">resize</a>(), <a href="#insert">insert</a>(), and <a href="#isEmpty">isEmpty</a>().
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<h3 class=fn>int <a name="find"></a>TQPtrVector::find ( const type * d, uint i = 0 ) const
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</h3>
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<p> Finds the first occurrence of item <em>d</em> in the vector using a
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linear search. The search starts at position <em>i</em>, which must be
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less than <a href="#size">size</a>(). <em>i</em> is by default 0; i.e. the search starts at
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the start of the vector.
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<p> Returns the position of <em>d</em>, or -1 if <em>d</em> could not be found.
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<p> Compares items using the virtual function <a href="#compareItems">compareItems</a>().
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<p> Use the much faster <a href="#bsearch">bsearch</a>() to search a sorted vector.
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<p> <p>See also <a href="#findRef">findRef</a>() and <a href="#bsearch">bsearch</a>().
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<h3 class=fn>int <a name="findRef"></a>TQPtrVector::findRef ( const type * d, uint i = 0 ) const
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</h3>
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<p> Finds the first occurrence of the item pointer <em>d</em> in the vector
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using a linear search. The search starts at position <em>i</em>, which
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must be less than <a href="#size">size</a>(). <em>i</em> is by default 0; i.e. the search
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starts at the start of the vector.
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<p> Returns the position of <em>d</em>, or -1 if <em>d</em> could not be found.
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<p> This function does <em>not</em> use <a href="#compareItems">compareItems</a>() to compare items.
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<p> Use the much faster <a href="#bsearch">bsearch</a>() to search a sorted vector.
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<p> <p>See also <a href="#find">find</a>() and <a href="#bsearch">bsearch</a>().
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<h3 class=fn>bool <a name="insert"></a>TQPtrVector::insert ( uint i, const type * d )
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</h3>
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<p> Sets position <em>i</em> in the vector to contain the item <em>d</em>. <em>i</em>
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must be less than <a href="#size">size</a>(). Any previous element in position <em>i</em> is
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removed.
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<p> <p>See also <a href="#at">at</a>().
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<h3 class=fn>bool <a name="isEmpty"></a>TQPtrVector::isEmpty () const
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</h3>
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<p> Returns TRUE if the vector is empty; otherwise returns FALSE.
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<p> <p>See also <a href="#count">count</a>().
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<h3 class=fn>bool <a name="isNull"></a>TQPtrVector::isNull () const
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</h3>
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<p> Returns TRUE if the vector is null; otherwise returns FALSE.
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<p> A null vector has <a href="#size">size</a>() == 0 and <a href="#data">data</a>() == 0.
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<p> <p>See also <a href="#size">size</a>().
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<h3 class=fn><a href="ntqptrvector.html">TQPtrVector</a><type> & <a name="operator-eq"></a>TQPtrVector::operator= ( const <a href="ntqptrvector.html">TQPtrVector</a><type> & v )
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</h3>
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<p> Assigns <em>v</em> to this vector and returns a reference to this
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vector.
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<p> This vector is first cleared and then all the items from <em>v</em> are
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copied into the vector. Only the pointers are copied (i.e. <a href="shclass.html#shallow-copy">shallow copy</a>).
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<p> <p>See also <a href="#clear">clear</a>().
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<h3 class=fn>bool <a name="operator-eq-eq"></a>TQPtrVector::operator== ( const <a href="ntqptrvector.html">TQPtrVector</a><type> & v ) const
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</h3>
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<p> Returns TRUE if this vector and <em>v</em> are equal; otherwise returns
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FALSE.
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<h3 class=fn>type * <a name="operator[]"></a>TQPtrVector::operator[] ( int i ) const
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</h3>
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<p> Returns the item at position <em>i</em>, or 0 if there is no item at
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that position. <em>i</em> must be less than <a href="#size">size</a>().
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<p> Equivalent to <a href="#at">at</a>( <em>i</em> ).
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<p> <p>See also <a href="#at">at</a>().
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<h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="read"></a>TQPtrVector::read ( <a href="ntqdatastream.html">TQDataStream</a> & s, <a href="ntqptrcollection.html#Item">TQPtrCollection::Item</a> & item )<tt> [virtual protected]</tt>
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</h3>
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<p> Reads a vector item, <em>item</em>, from the stream <em>s</em> and returns a
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reference to the stream.
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<p> The default implementation sets <em>item</em> to 0.
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<p> <p>See also <a href="#write">write</a>().
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<h3 class=fn>bool <a name="remove"></a>TQPtrVector::remove ( uint i )
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</h3>
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<p> Removes the item at position <em>i</em> in the vector, if there is one.
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<em>i</em> must be less than <a href="#size">size</a>().
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<p> Returns TRUE if <em>i</em> is within range; otherwise returns FALSE.
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<p> <p>See also <a href="#take">take</a>() and <a href="#at">at</a>().
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<h3 class=fn>bool <a name="resize"></a>TQPtrVector::resize ( uint size )
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</h3>
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<p> Resizes (expands or shrinks) the vector to <em>size</em> elements. The
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vector becomes a null vector if <em>size</em> == 0.
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<p> Any items at position <em>size</em> or beyond in the vector are removed.
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New positions are initialized to 0.
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<p> Returns TRUE if successful, i.e. if the memory was successfully
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allocated; otherwise returns FALSE.
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<p> <p>See also <a href="#size">size</a>() and <a href="#isNull">isNull</a>().
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<h3 class=fn>void <a name="setAutoDelete"></a>TQPtrCollection::setAutoDelete ( bool enable )
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</h3>
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<p> Sets the collection to auto-delete its contents if <em>enable</em> is
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TRUE and to never delete them if <em>enable</em> is FALSE.
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<p> If auto-deleting is turned on, all the items in a collection are
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|
deleted when the collection itself is deleted. This is convenient
|
|
if the collection has the only pointer to the items.
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|
<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.
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|
<p> Note that the auto-delete setting may also affect other functions
|
|
in subclasses. For example, a subclass that has a <a href="#remove">remove</a>()
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|
function will remove the item from its data structure, and if
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|
auto-delete is enabled, will also delete the item.
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<p> <p>See also <a href="ntqptrcollection.html#autoDelete">autoDelete</a>().
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|
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<p>Examples: <a href="grapher-nsplugin-example.html#x2769">grapher/grapher.cpp</a>, <a href="scribble-example.html#x924">scribble/scribble.cpp</a>, and <a href="bigtable-example.html#x1291">table/bigtable/main.cpp</a>.
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<h3 class=fn>uint <a name="size"></a>TQPtrVector::size () const
|
|
</h3>
|
|
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|
<p> Returns the size of the vector, i.e. the number of vector
|
|
positions. This is also the maximum number of items the vector can
|
|
hold.
|
|
<p> The vector is a null vector if <a href="#size">size</a>() == 0.
|
|
<p> <p>See also <a href="#isNull">isNull</a>(), <a href="#resize">resize</a>(), and <a href="#count">count</a>().
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|
|
|
<h3 class=fn>void <a name="sort"></a>TQPtrVector::sort ()
|
|
</h3>
|
|
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|
<p> Sorts the items in ascending order. Any empty positions will be
|
|
put last.
|
|
<p> Compares items using the virtual function <a href="#compareItems">compareItems</a>().
|
|
<p> <p>See also <a href="#bsearch">bsearch</a>().
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|
|
|
<h3 class=fn>type * <a name="take"></a>TQPtrVector::take ( uint i )
|
|
</h3>
|
|
|
|
<p> Returns the item at position <em>i</em> in the vector, and removes that
|
|
item from the vector. <em>i</em> must be less than <a href="#size">size</a>(). If there is
|
|
no item at position <em>i</em>, 0 is returned.
|
|
<p> Unlike <a href="#remove">remove</a>(), this function does <em>not</em> call <a href="ntqptrcollection.html#deleteItem">deleteItem</a>() for
|
|
the removed item.
|
|
<p> <p>See also <a href="#remove">remove</a>() and <a href="#at">at</a>().
|
|
|
|
<h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="write"></a>TQPtrVector::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 vector 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 -->
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|
<hr><p>
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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>
|
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</html>
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