1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
|
<!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/qptrvector.doc:41 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>TQPtrVector 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>TQPtrVector Class Reference</h1>
<p>The TQPtrVector class is a template collection class that
provides a vector (array).
<a href="#details">More...</a>
<p><tt>#include <<a href="qptrvector-h.html">qptrvector.h</a>></tt>
<p>Inherits <a href="qptrcollection.html">TQPtrCollection</a>.
<p><a href="qptrvector-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li class=fn><a href="#TQPtrVector"><b>TQPtrVector</b></a> ()</li>
<li class=fn><a href="#TQPtrVector-2"><b>TQPtrVector</b></a> ( uint size )</li>
<li class=fn><a href="#TQPtrVector-3"><b>TQPtrVector</b></a> ( const TQPtrVector<type> & v )</li>
<li class=fn><a href="#~TQPtrVector"><b>~TQPtrVector</b></a> ()</li>
<li class=fn>TQPtrVector<type> & <a href="#operator-eq"><b>operator=</b></a> ( const TQPtrVector<type> & v )</li>
<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const TQPtrVector<type> & v ) const</li>
<li class=fn>type ** <a href="#data"><b>data</b></a> () const</li>
<li class=fn>uint <a href="#size"><b>size</b></a> () const</li>
<li class=fn>virtual 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>bool <a href="#isNull"><b>isNull</b></a> () const</li>
<li class=fn>bool <a href="#resize"><b>resize</b></a> ( uint size )</li>
<li class=fn>bool <a href="#insert"><b>insert</b></a> ( uint i, const type * d )</li>
<li class=fn>bool <a href="#remove"><b>remove</b></a> ( uint i )</li>
<li class=fn>type * <a href="#take"><b>take</b></a> ( uint i )</li>
<li class=fn>virtual void <a href="#clear"><b>clear</b></a> ()</li>
<li class=fn>bool <a href="#fill"><b>fill</b></a> ( const type * d, int size = -1 )</li>
<li class=fn>void <a href="#sort"><b>sort</b></a> ()</li>
<li class=fn>int <a href="#bsearch"><b>bsearch</b></a> ( const type * d ) const</li>
<li class=fn>int <a href="#findRef"><b>findRef</b></a> ( const type * d, uint i = 0 ) const</li>
<li class=fn>int <a href="#find"><b>find</b></a> ( const type * d, uint i = 0 ) const</li>
<li class=fn>uint <a href="#containsRef"><b>containsRef</b></a> ( const type * d ) const</li>
<li class=fn>uint <a href="#contains"><b>contains</b></a> ( const type * d ) const</li>
<li class=fn>type * <a href="#operator[]"><b>operator[]</b></a> ( int i ) const</li>
<li class=fn>type * <a href="#at"><b>at</b></a> ( uint i ) const</li>
</ul>
<h2>Important Inherited 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>
</ul>
<h2>Protected Members</h2>
<ul>
<li class=fn>virtual int <a href="#compareItems"><b>compareItems</b></a> ( TQPtrCollection::Item d1, TQPtrCollection::Item d2 )</li>
<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 TQPtrVector class is a template collection class that
provides a vector (array).
<p>
<p>
<p> <a href="qvaluevector.html">TQValueVector</a> is an STL-compatible alternative to this class.
<p> TQPtrVector is implemented as a template class. Defines a template
instance TQPtrVector<X> to create a vector that contains pointers
to X (X*).
<p> A vector is the same as an array. The main difference between
TQPtrVector and <a href="qmemarray.html">TQMemArray</a> is that TQPtrVector stores pointers to the
elements, whereas TQMemArray stores the elements themselves (i.e.
TQMemArray is value-based and TQPtrVector is pointer-based).
<p> Items are added to the vector using <a href="#insert">insert</a>() or <a href="#fill">fill</a>(). Items are
removed with <a href="#remove">remove</a>(). You can get a pointer to an item at a
particular index position using <a href="#at">at</a>().
<p> Unless otherwise stated, all functions that remove items from the
vector will also delete the element pointed to if <a href="qptrcollection.html#setAutoDelete">auto-deletion</a> is enabled. By default,
auto-deletion is disabled; see <a href="qptrcollection.html#setAutoDelete">setAutoDelete</a>(). This behaviour can
be changed in a subclass by reimplementing the virtual function
<a href="qptrcollection.html#deleteItem">deleteItem</a>().
<p> Functions that compare items (<a href="#find">find</a>() and <a href="#sort">sort</a>() for example) will
do so using the virtual function <a href="#compareItems">compareItems</a>(). The default
implementation of this function only compares the pointer values.
Reimplement compareItems() in a subclass to get searching and
sorting based on the item contents. You can perform a linear
search for a pointer in the vector using <a href="#findRef">findRef</a>(), or a binary
search (of a sorted vector) using <a href="#bsearch">bsearch</a>(). You can count the
number of times an item appears in the vector with <a href="#contains">contains</a>() or
<a href="#containsRef">containsRef</a>().
<p> <p>See also <a href="qmemarray.html">TQMemArray</a> and <a href="tools.html">Non-GUI Classes</a>.
<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="TQPtrVector"></a>TQPtrVector::TQPtrVector ()
</h3>
<p> Constructs a null vector.
<p> <p>See also <a href="#isNull">isNull</a>().
<h3 class=fn><a name="TQPtrVector-2"></a>TQPtrVector::TQPtrVector ( uint size )
</h3>
<p> Constructs an vector with room for <em>size</em> items. Makes a null
vector if <em>size</em> == 0.
<p> All <em>size</em> positions in the vector are initialized to 0.
<p> <p>See also <a href="#size">size</a>(), <a href="#resize">resize</a>(), and <a href="#isNull">isNull</a>().
<h3 class=fn><a name="TQPtrVector-3"></a>TQPtrVector::TQPtrVector ( const <a href="qptrvector.html">TQPtrVector</a><type> & v )
</h3>
<p> Constructs a copy of <em>v</em>. Only the pointers are copied (i.e.
<a href="shclass.html#shallow-copy">shallow copy</a>).
<h3 class=fn><a name="~TQPtrVector"></a>TQPtrVector::~TQPtrVector ()
</h3>
<p> Removes all items from the vector, and destroys the vector itself.
<p> <p>See also <a href="#clear">clear</a>().
<h3 class=fn>type * <a name="at"></a>TQPtrVector::at ( uint i ) const
</h3>
<p> Returns the item at position <em>i</em>, or 0 if there is no item at
that position. <em>i</em> must be less than <a href="#size">size</a>().
<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="qptrcollection.html#setAutoDelete">setAutoDelete</a>().
<h3 class=fn>int <a name="bsearch"></a>TQPtrVector::bsearch ( const type * d ) const
</h3>
<p> In a sorted array, finds the first occurrence of <em>d</em> using a
binary search. For a sorted array, this is generally much faster
than <a href="#find">find</a>(), which performs a linear search.
<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.
<p> Compares items using the virtual function <a href="#compareItems">compareItems</a>().
<p> <p>See also <a href="#sort">sort</a>() and <a href="#find">find</a>().
<h3 class=fn>void <a name="clear"></a>TQPtrVector::clear ()<tt> [virtual]</tt>
</h3>
<p> Removes all items from the vector, and destroys the vector itself.
<p> The vector becomes a null vector.
<p> <p>See also <a href="#isNull">isNull</a>().
<p>Reimplemented from <a href="qptrcollection.html#clear">TQPtrCollection</a>.
<h3 class=fn>int <a name="compareItems"></a>TQPtrVector::compareItems ( <a href="qptrcollection.html#Item">TQPtrCollection::Item</a> d1, <a href="qptrcollection.html#Item">TQPtrCollection::Item</a> d2 )<tt> [virtual protected]</tt>
</h3>
<p> This virtual function compares two list items.
<p> Returns:
<ul>
<li> zero if <em>d1</em> == <em>d2</em>
<li> nonzero if <em>d1</em> != <em>d2</em>
</ul>
<p> This function returns <em>int</em> rather than <em>bool</em> so that
reimplementations can return one of three values and use it to
sort by:
<ul>
<li> 0 if <em>d1</em> == <em>d2</em>
<li> > 0 (positive integer) if <em>d1</em> > <em>d2</em>
<li> < 0 (negative integer) if <em>d1</em> < <em>d2</em>
</ul>
<p> The <a href="#sort">sort</a>() and <a href="#bsearch">bsearch</a>() functions require <a href="#compareItems">compareItems</a>() to be
implemented as described here.
<p> This function should not modify the vector because some const
functions call compareItems().
<h3 class=fn>uint <a name="contains"></a>TQPtrVector::contains ( const type * d ) const
</h3>
<p> Returns the number of occurrences of item <em>d</em> in the vector.
<p> Compares items using the virtual function <a href="#compareItems">compareItems</a>().
<p> <p>See also <a href="#containsRef">containsRef</a>().
<h3 class=fn>uint <a name="containsRef"></a>TQPtrVector::containsRef ( const type * d ) const
</h3>
<p> Returns the number of occurrences of the item pointer <em>d</em> in the
vector.
<p> This function does <em>not</em> use <a href="#compareItems">compareItems</a>() to compare items.
<p> <p>See also <a href="#findRef">findRef</a>().
<h3 class=fn>uint <a name="count"></a>TQPtrVector::count () const<tt> [virtual]</tt>
</h3>
<p> Returns the number of items in the vector. The vector is empty if
<a href="#count">count</a>() == 0.
<p> <p>See also <a href="#isEmpty">isEmpty</a>(), <a href="#size">size</a>(), and <a href="#isNull">isNull</a>().
<p>Reimplemented from <a href="qptrcollection.html#count">TQPtrCollection</a>.
<h3 class=fn>type ** <a name="data"></a>TQPtrVector::data () const
</h3>
<p> Returns a pointer to the actual vector data, which is an array of
type*.
<p> The vector is a null vector if <a href="#data">data</a>() == 0 (null pointer).
<p> <p>See also <a href="#isNull">isNull</a>().
<h3 class=fn>bool <a name="fill"></a>TQPtrVector::fill ( const type * d, int size = -1 )
</h3>
<p> Inserts item <em>d</em> in all positions in the vector. Any existing
items are removed. If <em>d</em> is 0, the vector becomes empty.
<p> If <em>size</em> >= 0, the vector is first resized to <em>size</em>. By
default, <em>size</em> is -1.
<p> Returns TRUE if successful, i.e. <em>size</em> is the same as the
current size, or <em>size</em> is larger and the memory has successfully
been allocated; otherwise returns FALSE.
<p> <p>See also <a href="#resize">resize</a>(), <a href="#insert">insert</a>(), and <a href="#isEmpty">isEmpty</a>().
<h3 class=fn>int <a name="find"></a>TQPtrVector::find ( const type * d, uint i = 0 ) const
</h3>
<p> Finds the first occurrence of item <em>d</em> in the vector using a
linear search. The search starts at position <em>i</em>, which must be
less than <a href="#size">size</a>(). <em>i</em> is by default 0; i.e. the search starts at
the start of the vector.
<p> Returns the position of <em>d</em>, or -1 if <em>d</em> could not be found.
<p> Compares items using the virtual function <a href="#compareItems">compareItems</a>().
<p> Use the much faster <a href="#bsearch">bsearch</a>() to search a sorted vector.
<p> <p>See also <a href="#findRef">findRef</a>() and <a href="#bsearch">bsearch</a>().
<h3 class=fn>int <a name="findRef"></a>TQPtrVector::findRef ( const type * d, uint i = 0 ) const
</h3>
<p> Finds the first occurrence of the item pointer <em>d</em> in the vector
using a linear search. The search starts at position <em>i</em>, which
must be less than <a href="#size">size</a>(). <em>i</em> is by default 0; i.e. the search
starts at the start of the vector.
<p> Returns the position of <em>d</em>, or -1 if <em>d</em> could not be found.
<p> This function does <em>not</em> use <a href="#compareItems">compareItems</a>() to compare items.
<p> Use the much faster <a href="#bsearch">bsearch</a>() to search a sorted vector.
<p> <p>See also <a href="#find">find</a>() and <a href="#bsearch">bsearch</a>().
<h3 class=fn>bool <a name="insert"></a>TQPtrVector::insert ( uint i, const type * d )
</h3>
<p> Sets position <em>i</em> in the vector to contain the item <em>d</em>. <em>i</em>
must be less than <a href="#size">size</a>(). Any previous element in position <em>i</em> is
removed.
<p> <p>See also <a href="#at">at</a>().
<h3 class=fn>bool <a name="isEmpty"></a>TQPtrVector::isEmpty () const
</h3>
<p> Returns TRUE if the vector is empty; otherwise returns FALSE.
<p> <p>See also <a href="#count">count</a>().
<h3 class=fn>bool <a name="isNull"></a>TQPtrVector::isNull () const
</h3>
<p> Returns TRUE if the vector is null; otherwise returns FALSE.
<p> A null vector has <a href="#size">size</a>() == 0 and <a href="#data">data</a>() == 0.
<p> <p>See also <a href="#size">size</a>().
<h3 class=fn><a href="qptrvector.html">TQPtrVector</a><type> & <a name="operator-eq"></a>TQPtrVector::operator= ( const <a href="qptrvector.html">TQPtrVector</a><type> & v )
</h3>
<p> Assigns <em>v</em> to this vector and returns a reference to this
vector.
<p> This vector is first cleared and then all the items from <em>v</em> are
copied into the vector. Only the pointers are copied (i.e. <a href="shclass.html#shallow-copy">shallow copy</a>).
<p> <p>See also <a href="#clear">clear</a>().
<h3 class=fn>bool <a name="operator-eq-eq"></a>TQPtrVector::operator== ( const <a href="qptrvector.html">TQPtrVector</a><type> & v ) const
</h3>
<p> Returns TRUE if this vector and <em>v</em> are equal; otherwise returns
FALSE.
<h3 class=fn>type * <a name="operator[]"></a>TQPtrVector::operator[] ( int i ) const
</h3>
<p> Returns the item at position <em>i</em>, or 0 if there is no item at
that position. <em>i</em> must be less than <a href="#size">size</a>().
<p> Equivalent to <a href="#at">at</a>( <em>i</em> ).
<p> <p>See also <a href="#at">at</a>().
<h3 class=fn><a href="qdatastream.html">TQDataStream</a> & <a name="read"></a>TQPtrVector::read ( <a href="qdatastream.html">TQDataStream</a> & s, <a href="qptrcollection.html#Item">TQPtrCollection::Item</a> & item )<tt> [virtual protected]</tt>
</h3>
<p> Reads a vector 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>TQPtrVector::remove ( uint i )
</h3>
<p> Removes the item at position <em>i</em> in the vector, if there is one.
<em>i</em> must be less than <a href="#size">size</a>().
<p> Returns TRUE if <em>i</em> is within range; otherwise returns FALSE.
<p> <p>See also <a href="#take">take</a>() and <a href="#at">at</a>().
<h3 class=fn>bool <a name="resize"></a>TQPtrVector::resize ( uint size )
</h3>
<p> Resizes (expands or shrinks) the vector to <em>size</em> elements. The
vector becomes a null vector if <em>size</em> == 0.
<p> Any items at position <em>size</em> or beyond in the vector are removed.
New positions are initialized to 0.
<p> Returns TRUE if successful, i.e. if the memory was successfully
allocated; otherwise returns FALSE.
<p> <p>See also <a href="#size">size</a>() and <a href="#isNull">isNull</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 <a href="#remove">remove</a>()
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="qptrcollection.html#autoDelete">autoDelete</a>().
<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>.
<h3 class=fn>uint <a name="size"></a>TQPtrVector::size () const
</h3>
<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>().
<h3 class=fn>void <a name="sort"></a>TQPtrVector::sort ()
</h3>
<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>().
<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="qptrcollection.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="qdatastream.html">TQDataStream</a> & <a name="write"></a>TQPtrVector::write ( <a href="qdatastream.html">TQDataStream</a> & s, <a href="qptrcollection.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 -->
<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>
|
