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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // Name: dynarray.h | |
e54c96f1 | 3 | // Purpose: interface of wxArray<T> |
23324ae1 FM |
4 | // Author: wxWidgets team |
5 | // RCS-ID: $Id$ | |
6 | // Licence: wxWindows license | |
7 | ///////////////////////////////////////////////////////////////////////////// | |
8 | ||
9 | /** | |
7c913512 | 10 | |
0c1fe6e9 | 11 | This section describes the so called @e "dynamic arrays". This is a C |
23324ae1 | 12 | array-like type safe data structure i.e. the member access time is constant |
0c1fe6e9 BP |
13 | (and not linear according to the number of container elements as for linked |
14 | lists). However, these arrays are dynamic in the sense that they will | |
15 | automatically allocate more memory if there is not enough of it for adding | |
16 | a new element. They also perform range checking on the index values but in | |
17 | debug mode only, so please be sure to compile your application in debug | |
18 | mode to use it (see @ref overview_debugging for details). So, unlike the | |
19 | arrays in some other languages, attempt to access an element beyond the | |
20 | arrays bound doesn't automatically expand the array but provokes an | |
21 | assertion failure instead in debug build and does nothing (except possibly | |
22 | crashing your program) in the release build. | |
23 | ||
24 | The array classes were designed to be reasonably efficient, both in terms | |
25 | of run-time speed and memory consumption and the executable size. The speed | |
26 | of array item access is, of course, constant (independent of the number of | |
27 | elements) making them much more efficient than linked lists (wxList). | |
28 | Adding items to the arrays is also implemented in more or less constant | |
29 | time, but the price is preallocating the memory in advance. In the | |
30 | "memory management" function section, you may find some useful hints about | |
31 | optimizing wxArray memory usage. As for executable size, all wxArray | |
32 | functions are inline, so they do not take @e any space at all. | |
7c913512 | 33 | |
23324ae1 | 34 | wxWidgets has three different kinds of array. All of them derive from |
0c1fe6e9 BP |
35 | wxBaseArray class which works with untyped data and can not be used |
36 | directly. The standard macros WX_DEFINE_ARRAY(), WX_DEFINE_SORTED_ARRAY() | |
37 | and WX_DEFINE_OBJARRAY() are used to define a new class deriving from it. | |
38 | The classes declared will be called in this documentation wxArray, | |
39 | wxSortedArray and wxObjArray but you should keep in mind that no classes | |
40 | with such names actually exist, each time you use one of the | |
41 | WX_DEFINE_XXXARRAY() macros, you define a class with a new name. In fact, | |
42 | these names are "template" names and each usage of one of the macros | |
43 | mentioned above creates a template specialization for the given element | |
44 | type. | |
45 | ||
46 | wxArray is suitable for storing integer types and pointers which it does | |
47 | not treat as objects in any way, i.e. the element pointed to by the pointer | |
48 | is not deleted when the element is removed from the array. It should be | |
49 | noted that all of wxArray's functions are inline, so it costs strictly | |
50 | nothing to define as many array types as you want (either in terms of the | |
51 | executable size or the speed) as long as at least one of them is defined | |
52 | and this is always the case because wxArrays are used by wxWidgets | |
53 | internally. This class has one serious limitation: it can only be used for | |
54 | storing integral types (bool, char, short, int, long and their unsigned | |
55 | variants) or pointers (of any kind). An attempt to use with objects of | |
56 | @c sizeof() greater than @c sizeof(long) will provoke a runtime assertion | |
57 | failure, however declaring a wxArray of floats will not (on the machines | |
58 | where @c "sizeof(float) <= sizeof(long)"), yet it will @b not work, please | |
59 | use wxObjArray for storing floats and doubles. | |
60 | ||
61 | wxSortedArray is a wxArray variant which should be used when searching in | |
62 | the array is a frequently used operation. It requires you to define an | |
63 | additional function for comparing two elements of the array element type | |
64 | and always stores its items in the sorted order (according to this | |
65 | function). Thus, its Index() function execution time is @c "O(log(N))" | |
66 | instead of @c "O(N)" for the usual arrays but the Add() method is slower: | |
67 | it is @c "O(log(N))" instead of constant time (neglecting time spent in | |
68 | memory allocation routine). However, in a usual situation elements are | |
69 | added to an array much less often than searched inside it, so wxSortedArray | |
70 | may lead to huge performance improvements compared to wxArray. Finally, it | |
71 | should be noticed that, as wxArray, wxSortedArray can be only used for | |
72 | storing integral types or pointers. | |
73 | ||
74 | wxObjArray class treats its elements like "objects". It may delete them | |
75 | when they are removed from the array (invoking the correct destructor) and | |
76 | copies them using the objects copy constructor. In order to implement this | |
77 | behaviour the definition of the wxObjArray arrays is split in two parts: | |
78 | first, you should declare the new wxObjArray class using the | |
79 | WX_DECLARE_OBJARRAY() macro and then you must include the file defining the | |
80 | implementation of template type: @<wx/arrimpl.cpp@> and define the array | |
81 | class with the WX_DEFINE_OBJARRAY() macro from a point where the full (as | |
82 | opposed to 'forward') declaration of the array elements class is in scope. | |
83 | As it probably sounds very complicated here is an example: | |
7c913512 | 84 | |
23324ae1 | 85 | @code |
0c1fe6e9 | 86 | #include <wx/dynarray.h> |
7c913512 | 87 | |
0c1fe6e9 BP |
88 | // We must forward declare the array because it is used |
89 | // inside the class declaration. | |
23324ae1 FM |
90 | class MyDirectory; |
91 | class MyFile; | |
7c913512 | 92 | |
0c1fe6e9 BP |
93 | // This defines two new types: ArrayOfDirectories and ArrayOfFiles which |
94 | // can be now used as shown below. | |
23324ae1 FM |
95 | WX_DECLARE_OBJARRAY(MyDirectory, ArrayOfDirectories); |
96 | WX_DECLARE_OBJARRAY(MyFile, ArrayOfFiles); | |
7c913512 | 97 | |
23324ae1 FM |
98 | class MyDirectory |
99 | { | |
0c1fe6e9 BP |
100 | // ... |
101 | ArrayOfDirectories m_subdirectories; // All subdirectories | |
102 | ArrayOfFiles m_files; // All files in this directory | |
23324ae1 | 103 | }; |
7c913512 | 104 | |
0c1fe6e9 | 105 | // ... |
7c913512 | 106 | |
0c1fe6e9 | 107 | // Now that we have MyDirectory declaration in scope we may finish the |
23324ae1 FM |
108 | // definition of ArrayOfDirectories -- note that this expands into some C++ |
109 | // code and so should only be compiled once (i.e., don't put this in the | |
110 | // header, but into a source file or you will get linking errors) | |
0c1fe6e9 | 111 | #include <wx/arrimpl.cpp> // This is a magic incantation which must be done! |
23324ae1 | 112 | WX_DEFINE_OBJARRAY(ArrayOfDirectories); |
7c913512 | 113 | |
23324ae1 FM |
114 | // that's all! |
115 | @endcode | |
7c913512 | 116 | |
0c1fe6e9 | 117 | It is not as elegant as writing this: |
7c913512 | 118 | |
23324ae1 | 119 | @code |
0c1fe6e9 | 120 | typedef std::vector<MyDirectory> ArrayOfDirectories; |
23324ae1 | 121 | @endcode |
7c913512 | 122 | |
0c1fe6e9 BP |
123 | But is not that complicated and allows the code to be compiled with any, |
124 | however dumb, C++ compiler in the world. | |
7c913512 | 125 | |
0c1fe6e9 BP |
126 | Remember to include @<wx/arrimpl.cpp@> just before each |
127 | WX_DEFINE_OBJARRAY() ocurrence in your code, even if you have several in | |
128 | the same file. | |
7c913512 | 129 | |
23324ae1 | 130 | Things are much simpler for wxArray and wxSortedArray however: it is enough |
0c1fe6e9 | 131 | just to write: |
7c913512 | 132 | |
23324ae1 FM |
133 | @code |
134 | WX_DEFINE_ARRAY_INT(int, ArrayOfInts); | |
135 | WX_DEFINE_SORTED_ARRAY_INT(int, ArrayOfSortedInts); | |
136 | @endcode | |
7c913512 | 137 | |
0c1fe6e9 BP |
138 | There is only one @c DEFINE macro and no need for separate @c DECLARE one. |
139 | For the arrays of the primitive types, the macros | |
23324ae1 | 140 | @c WX_DEFINE_ARRAY_CHAR/SHORT/INT/SIZE_T/LONG/DOUBLE should be used |
0c1fe6e9 BP |
141 | depending on the sizeof of the values (notice that storing values of |
142 | smaller type, e.g. shorts, in an array of larger one, e.g. @c ARRAY_INT, | |
143 | does not work on all architectures!). | |
144 | ||
145 | ||
146 | @section array_macros Macros for Template Array Definition | |
147 | ||
148 | To use an array you must first define the array class. This is done with | |
149 | the help of the macros in this section. The class of array elements must be | |
150 | (at least) forward declared for WX_DEFINE_ARRAY(), WX_DEFINE_SORTED_ARRAY() | |
151 | and WX_DECLARE_OBJARRAY() macros and must be fully declared before you use | |
152 | WX_DEFINE_OBJARRAY() macro. | |
153 | ||
154 | - WX_DEFINE_ARRAY() | |
155 | - WX_DEFINE_EXPORTED_ARRAY() | |
156 | - WX_DEFINE_USER_EXPORTED_ARRAY() | |
157 | - WX_DEFINE_SORTED_ARRAY() | |
158 | - WX_DEFINE_SORTED_EXPORTED_ARRAY() | |
159 | - WX_DEFINE_SORTED_USER_EXPORTED_ARRAY() | |
160 | - WX_DECLARE_EXPORTED_OBJARRAY() | |
161 | - WX_DECLARE_USER_EXPORTED_OBJARRAY() | |
162 | - WX_DEFINE_OBJARRAY() | |
163 | - WX_DEFINE_EXPORTED_OBJARRAY() | |
164 | - WX_DEFINE_USER_EXPORTED_OBJARRAY() | |
165 | ||
166 | To slightly complicate the matters even further, the operator "->" defined | |
167 | by default for the array iterators by these macros only makes sense if the | |
168 | array element type is not a pointer itself and, although it still works, | |
169 | this provokes warnings from some compilers and to avoid them you should use | |
170 | the @c _PTR versions of the macros above. For example, to define an array | |
171 | of pointers to @c double you should use: | |
172 | ||
173 | @code | |
174 | WX_DEFINE_ARRAY_PTR(double *, MyArrayOfDoublePointers); | |
175 | @endcode | |
176 | ||
177 | Note that the above macros are generally only useful for wxObject types. | |
178 | There are separate macros for declaring an array of a simple type, such as | |
179 | an int. | |
180 | ||
181 | The following simple types are supported: | |
182 | - @c int | |
183 | - @c long | |
184 | - @c size_t | |
185 | - @c double | |
186 | ||
187 | To create an array of a simple type, simply append the type you want in | |
188 | CAPS to the array definition. | |
189 | ||
190 | For example, you'd use one of the following variants for an integer array: | |
191 | ||
192 | - WX_DEFINE_ARRAY_INT() | |
193 | - WX_DEFINE_EXPORTED_ARRAY_INT() | |
194 | - WX_DEFINE_USER_EXPORTED_ARRAY_INT() | |
195 | - WX_DEFINE_SORTED_ARRAY_INT() | |
196 | - WX_DEFINE_SORTED_EXPORTED_ARRAY_INT() | |
197 | - WX_DEFINE_SORTED_USER_EXPORTED_ARRAY_INT() | |
198 | ||
7c913512 | 199 | |
b619c109 FM |
200 | @section array_predef Predefined array types |
201 | ||
202 | wxWidgets defines the following dynamic array types: | |
1e0e263e FM |
203 | - ::wxArrayShort |
204 | - ::wxArrayInt | |
205 | - ::wxArrayDouble | |
206 | - ::wxArrayLong | |
207 | - ::wxArrayPtrVoid | |
b619c109 FM |
208 | |
209 | To use them you don't need any macro; you just need to include @c dynarray.h. | |
210 | ||
211 | ||
23324ae1 | 212 | @library{wxbase} |
0c1fe6e9 | 213 | @category{containers} |
7c913512 | 214 | |
b1db61e1 | 215 | @see @ref overview_container, wxList<T>, wxVector<T> |
23324ae1 | 216 | */ |
1e0e263e | 217 | template <typename T> |
7c913512 | 218 | class wxArray<T> |
23324ae1 FM |
219 | { |
220 | public: | |
23324ae1 | 221 | /** |
0c1fe6e9 BP |
222 | @name Constructors and Destructors |
223 | ||
224 | Array classes are 100% C++ objects and as such they have the | |
225 | appropriate copy constructors and assignment operators. Copying wxArray | |
226 | just copies the elements but copying wxObjArray copies the arrays | |
227 | items. However, for memory-efficiency sake, neither of these classes | |
228 | has virtual destructor. It is not very important for wxArray which has | |
229 | trivial destructor anyhow, but it does mean that you should avoid | |
230 | deleting wxObjArray through a wxBaseArray pointer (as you would never | |
231 | use wxBaseArray anyhow it shouldn't be a problem) and that you should | |
232 | not derive your own classes from the array classes. | |
23324ae1 | 233 | */ |
0c1fe6e9 | 234 | //@{ |
23324ae1 FM |
235 | |
236 | /** | |
0c1fe6e9 | 237 | Default constructor. |
23324ae1 | 238 | */ |
0c1fe6e9 | 239 | wxArray(); |
76e9224e | 240 | |
23324ae1 | 241 | /** |
0c1fe6e9 | 242 | Default constructor initializes an empty array object. |
23324ae1 | 243 | */ |
0c1fe6e9 | 244 | wxObjArray(); |
76e9224e | 245 | |
23324ae1 | 246 | /** |
0c1fe6e9 BP |
247 | There is no default constructor for wxSortedArray classes - you must |
248 | initialize it with a function to use for item comparison. It is a | |
249 | function which is passed two arguments of type @c T where @c T is the | |
250 | array element type and which should return a negative, zero or positive | |
251 | value according to whether the first element passed to it is less than, | |
252 | equal to or greater than the second one. | |
23324ae1 | 253 | */ |
0c1fe6e9 | 254 | wxSortedArray(int (*)(T first, T second)compareFunction); |
23324ae1 FM |
255 | |
256 | /** | |
0c1fe6e9 BP |
257 | Performs a shallow array copy (i.e. doesn't copy the objects pointed to |
258 | even if the source array contains the items of pointer type). | |
23324ae1 | 259 | */ |
0c1fe6e9 | 260 | wxArray(const wxArray& array); |
76e9224e | 261 | |
23324ae1 | 262 | /** |
0c1fe6e9 BP |
263 | Performs a shallow array copy (i.e. doesn't copy the objects pointed to |
264 | even if the source array contains the items of pointer type). | |
23324ae1 | 265 | */ |
0c1fe6e9 | 266 | wxSortedArray(const wxSortedArray& array); |
76e9224e | 267 | |
0c1fe6e9 BP |
268 | /** |
269 | Performs a deep copy (i.e. the array element are copied too). | |
270 | */ | |
271 | wxObjArray(const wxObjArray& array); | |
23324ae1 | 272 | |
23324ae1 | 273 | /** |
0c1fe6e9 BP |
274 | Performs a shallow array copy (i.e. doesn't copy the objects pointed to |
275 | even if the source array contains the items of pointer type). | |
23324ae1 | 276 | */ |
0c1fe6e9 | 277 | wxArray& operator=(const wxArray& array); |
76e9224e | 278 | |
0c1fe6e9 BP |
279 | /** |
280 | Performs a shallow array copy (i.e. doesn't copy the objects pointed to | |
281 | even if the source array contains the items of pointer type). | |
282 | */ | |
283 | wxSortedArray& operator=(const wxSortedArray& array); | |
76e9224e | 284 | |
0c1fe6e9 BP |
285 | /** |
286 | Performs a deep copy (i.e. the array element are copied too). | |
287 | */ | |
288 | wxObjArray& operator=(const wxObjArray& array); | |
23324ae1 FM |
289 | |
290 | /** | |
0c1fe6e9 BP |
291 | This destructor does not delete all the items owned by the array, you |
292 | may use the WX_CLEAR_ARRAY() macro for this. | |
23324ae1 | 293 | */ |
0c1fe6e9 | 294 | ~wxArray(); |
76e9224e | 295 | |
0c1fe6e9 BP |
296 | /** |
297 | This destructor does not delete all the items owned by the array, you | |
298 | may use the WX_CLEAR_ARRAY() macro for this. | |
299 | */ | |
300 | ~wxSortedArray(); | |
76e9224e | 301 | |
0c1fe6e9 BP |
302 | /** |
303 | This destructor deletes all the items owned by the array. | |
304 | */ | |
305 | ~wxObjArray(); | |
306 | ||
307 | //@} | |
308 | ||
23324ae1 FM |
309 | |
310 | /** | |
0c1fe6e9 BP |
311 | @name Memory Management |
312 | ||
313 | Automatic array memory management is quite trivial: the array starts by | |
314 | preallocating some minimal amount of memory (defined by | |
315 | @c WX_ARRAY_DEFAULT_INITIAL_SIZE) and when further new items exhaust | |
316 | already allocated memory it reallocates it adding 50% of the currently | |
317 | allocated amount, but no more than some maximal number which is defined | |
318 | by the @c ARRAY_MAXSIZE_INCREMENT constant. Of course, this may lead to | |
319 | some memory being wasted (@c ARRAY_MAXSIZE_INCREMENT in the worst case, | |
320 | i.e. 4Kb in the current implementation), so the Shrink() function is | |
321 | provided to deallocate the extra memory. The Alloc() function can also | |
322 | be quite useful if you know in advance how many items you are going to | |
323 | put in the array and will prevent the array code from reallocating the | |
324 | memory more times than needed. | |
23324ae1 | 325 | */ |
0c1fe6e9 | 326 | //@{ |
23324ae1 FM |
327 | |
328 | /** | |
0c1fe6e9 BP |
329 | Preallocates memory for a given number of array elements. It is worth |
330 | calling when the number of items which are going to be added to the | |
331 | array is known in advance because it will save unneeded memory | |
332 | reallocation. If the array already has enough memory for the given | |
333 | number of items, nothing happens. In any case, the existing contents of | |
334 | the array is not modified. | |
23324ae1 | 335 | */ |
0c1fe6e9 | 336 | void Alloc(size_t count); |
23324ae1 | 337 | |
23324ae1 | 338 | /** |
0c1fe6e9 BP |
339 | Frees all memory unused by the array. If the program knows that no new |
340 | items will be added to the array it may call Shrink() to reduce its | |
341 | memory usage. However, if a new item is added to the array, some extra | |
342 | memory will be allocated again. | |
23324ae1 | 343 | */ |
0c1fe6e9 BP |
344 | void Shrink(); |
345 | ||
23324ae1 FM |
346 | //@} |
347 | ||
0c1fe6e9 | 348 | |
23324ae1 | 349 | /** |
0c1fe6e9 | 350 | @name Number of Elements and Simple Item Access |
23324ae1 | 351 | |
0c1fe6e9 BP |
352 | Functions in this section return the total number of array elements and |
353 | allow to retrieve them - possibly using just the C array indexing [] | |
354 | operator which does exactly the same as the Item() method. | |
355 | */ | |
23324ae1 | 356 | //@{ |
0c1fe6e9 | 357 | |
23324ae1 | 358 | /** |
0c1fe6e9 | 359 | Return the number of items in the array. |
23324ae1 | 360 | */ |
0c1fe6e9 | 361 | size_t GetCount() const; |
23324ae1 FM |
362 | |
363 | /** | |
364 | Returns @true if the array is empty, @false otherwise. | |
365 | */ | |
328f5751 | 366 | bool IsEmpty() const; |
23324ae1 FM |
367 | |
368 | /** | |
0c1fe6e9 BP |
369 | Returns the item at the given position in the array. If @a index is out |
370 | of bounds, an assert failure is raised in the debug builds but nothing | |
371 | special is done in the release build. | |
23324ae1 | 372 | |
0c1fe6e9 BP |
373 | The returned value is of type "reference to the array element type" for |
374 | all of the array classes. | |
23324ae1 | 375 | */ |
0c1fe6e9 | 376 | T& Item(size_t index) const; |
23324ae1 FM |
377 | |
378 | /** | |
0c1fe6e9 BP |
379 | Returns the last element in the array, i.e. is the same as calling |
380 | "Item(GetCount() - 1)". An assert failure is raised in the debug mode | |
381 | if the array is empty. | |
3c4f71cc | 382 | |
0c1fe6e9 BP |
383 | The returned value is of type "reference to the array element type" for |
384 | all of the array classes. | |
385 | */ | |
386 | T& Last() const; | |
3c4f71cc | 387 | |
0c1fe6e9 | 388 | //@} |
3c4f71cc | 389 | |
3c4f71cc | 390 | |
0c1fe6e9 BP |
391 | /** |
392 | @name Adding Items | |
393 | */ | |
394 | //@{ | |
3c4f71cc | 395 | |
0c1fe6e9 BP |
396 | /** |
397 | Appends the given number of @a copies of the @a item to the array | |
398 | consisting of the elements of type @c T. | |
3c4f71cc | 399 | |
0c1fe6e9 | 400 | This version is used with wxArray. |
3c4f71cc | 401 | |
0c1fe6e9 BP |
402 | You may also use WX_APPEND_ARRAY() macro to append all elements of one |
403 | array to another one but it is more efficient to use the @a copies | |
404 | parameter and modify the elements in place later if you plan to append | |
405 | a lot of items. | |
406 | */ | |
407 | void Add(T item, size_t copies = 1); | |
76e9224e | 408 | |
0c1fe6e9 BP |
409 | /** |
410 | Appends the @a item to the array consisting of the elements of type | |
411 | @c T. | |
3c4f71cc | 412 | |
0c1fe6e9 BP |
413 | This version is used with wxSortedArray, returning the index where |
414 | @a item is stored. | |
415 | */ | |
416 | size_t Add(T item); | |
76e9224e | 417 | |
0c1fe6e9 BP |
418 | /** |
419 | Appends the @a item to the array consisting of the elements of type | |
420 | @c T. | |
421 | ||
422 | This version is used with wxObjArray. The array will take ownership of | |
4050e98d | 423 | the @a item, deleting it when the item is deleted from the array. Note |
0c1fe6e9 BP |
424 | that you cannot append more than one pointer as reusing it would lead |
425 | to deleting it twice (or more) resulting in a crash. | |
426 | ||
427 | You may also use WX_APPEND_ARRAY() macro to append all elements of one | |
428 | array to another one but it is more efficient to use the @a copies | |
429 | parameter and modify the elements in place later if you plan to append | |
430 | a lot of items. | |
431 | */ | |
432 | void Add(T* item); | |
76e9224e | 433 | |
0c1fe6e9 BP |
434 | /** |
435 | Appends the given number of @a copies of the @a item to the array | |
436 | consisting of the elements of type @c T. | |
3c4f71cc | 437 | |
0c1fe6e9 BP |
438 | This version is used with wxObjArray. The array will make a copy of the |
439 | item and will not take ownership of the original item. | |
3c4f71cc | 440 | |
0c1fe6e9 BP |
441 | You may also use WX_APPEND_ARRAY() macro to append all elements of one |
442 | array to another one but it is more efficient to use the @a copies | |
443 | parameter and modify the elements in place later if you plan to append | |
444 | a lot of items. | |
445 | */ | |
446 | void Add(T& item, size_t copies = 1); | |
3c4f71cc | 447 | |
0c1fe6e9 BP |
448 | /** |
449 | Inserts the given @a item into the array in the specified @e index | |
450 | position. | |
3c4f71cc | 451 | |
0c1fe6e9 BP |
452 | Be aware that you will set out the order of the array if you give a |
453 | wrong position. | |
3c4f71cc | 454 | |
0c1fe6e9 BP |
455 | This function is useful in conjunction with IndexForInsert() for a |
456 | common operation of "insert only if not found". | |
457 | */ | |
458 | void AddAt(T item, size_t index); | |
3c4f71cc | 459 | |
0c1fe6e9 BP |
460 | /** |
461 | Insert the given number of @a copies of the @a item into the array | |
462 | before the existing item @a n - thus, @e Insert(something, 0u) will | |
463 | insert an item in such way that it will become the first array element. | |
3c4f71cc | 464 | |
0c1fe6e9 BP |
465 | wxSortedArray doesn't have this function because inserting in wrong |
466 | place would break its sorted condition. | |
3c4f71cc | 467 | |
0c1fe6e9 BP |
468 | Please see Add() for an explanation of the differences between the |
469 | overloaded versions of this function. | |
470 | */ | |
471 | void Insert(T item, size_t n, size_t copies = 1); | |
76e9224e | 472 | |
0c1fe6e9 BP |
473 | /** |
474 | Insert the @a item into the array before the existing item @a n - thus, | |
475 | @e Insert(something, 0u) will insert an item in such way that it will | |
476 | become the first array element. | |
3c4f71cc | 477 | |
0c1fe6e9 BP |
478 | wxSortedArray doesn't have this function because inserting in wrong |
479 | place would break its sorted condition. | |
3c4f71cc | 480 | |
0c1fe6e9 BP |
481 | Please see Add() for an explanation of the differences between the |
482 | overloaded versions of this function. | |
483 | */ | |
484 | void Insert(T* item, size_t n); | |
76e9224e | 485 | |
0c1fe6e9 BP |
486 | /** |
487 | Insert the given number of @a copies of the @a item into the array | |
488 | before the existing item @a n - thus, @e Insert(something, 0u) will | |
489 | insert an item in such way that it will become the first array element. | |
3c4f71cc | 490 | |
0c1fe6e9 BP |
491 | wxSortedArray doesn't have this function because inserting in wrong |
492 | place would break its sorted condition. | |
3c4f71cc | 493 | |
0c1fe6e9 BP |
494 | Please see Add() for an explanation of the differences between the |
495 | overloaded versions of this function. | |
23324ae1 | 496 | */ |
0c1fe6e9 | 497 | void Insert(T& item, size_t n, size_t copies = 1); |
23324ae1 FM |
498 | |
499 | /** | |
0c1fe6e9 BP |
500 | This function ensures that the number of array elements is at least |
501 | @a count. If the array has already @a count or more items, nothing is | |
502 | done. Otherwise, @a count - GetCount() elements are added and | |
503 | initialized to the value @a defval. | |
3c4f71cc | 504 | |
0c1fe6e9 | 505 | @see GetCount() |
23324ae1 | 506 | */ |
0c1fe6e9 | 507 | void SetCount(size_t count, T defval = T(0)); |
23324ae1 | 508 | |
0c1fe6e9 | 509 | //@} |
23324ae1 | 510 | |
3c4f71cc | 511 | |
0c1fe6e9 BP |
512 | /** |
513 | @name Removing Items | |
514 | */ | |
515 | //@{ | |
3c4f71cc | 516 | |
0c1fe6e9 BP |
517 | /** |
518 | This function does the same as Empty() and additionally frees the | |
519 | memory allocated to the array. | |
520 | */ | |
521 | void Clear(); | |
3c4f71cc | 522 | |
0c1fe6e9 BP |
523 | /** |
524 | Removes the element from the array, but unlike Remove(), it doesn't | |
525 | delete it. The function returns the pointer to the removed element. | |
23324ae1 | 526 | */ |
0c1fe6e9 | 527 | T* Detach(size_t index); |
23324ae1 | 528 | |
0c1fe6e9 BP |
529 | /** |
530 | Empties the array. For wxObjArray classes, this destroys all of the | |
531 | array elements. For wxArray and wxSortedArray this does nothing except | |
532 | marking the array of being empty - this function does not free the | |
533 | allocated memory, use Clear() for this. | |
534 | */ | |
535 | void Empty(); | |
23324ae1 FM |
536 | |
537 | /** | |
0c1fe6e9 BP |
538 | Removes an element from the array by value: the first item of the array |
539 | equal to @a item is removed, an assert failure will result from an | |
23324ae1 | 540 | attempt to remove an item which doesn't exist in the array. |
3c4f71cc | 541 | |
0c1fe6e9 BP |
542 | When an element is removed from wxObjArray it is deleted by the array - |
543 | use Detach() if you don't want this to happen. On the other hand, when | |
544 | an object is removed from a wxArray nothing happens - you should delete | |
545 | it manually if required: | |
546 | ||
547 | @code | |
548 | T *item = array[n]; | |
36835e02 | 549 | array.Remove(item); |
0c1fe6e9 | 550 | delete item; |
0c1fe6e9 BP |
551 | @endcode |
552 | ||
553 | See also WX_CLEAR_ARRAY() macro which deletes all elements of a wxArray | |
554 | (supposed to contain pointers). | |
36835e02 | 555 | |
72a4fa54 VZ |
556 | Notice that for sorted arrays this method uses binary search to find |
557 | the item so it doesn't necessarily remove the first matching item, but | |
558 | the first one found by the binary search. | |
559 | ||
36835e02 | 560 | @see RemoveAt() |
23324ae1 | 561 | */ |
2efaf754 | 562 | void Remove(T item); |
23324ae1 FM |
563 | |
564 | /** | |
4cc4bfaf | 565 | Removes @a count elements starting at @a index from the array. When an |
23324ae1 | 566 | element is removed from wxObjArray it is deleted by the array - use |
0c1fe6e9 BP |
567 | Detach() if you don't want this to happen. On the other hand, when an |
568 | object is removed from a wxArray nothing happens - you should delete it | |
569 | manually if required: | |
570 | ||
571 | @code | |
572 | T *item = array[n]; | |
573 | delete item; | |
574 | array.RemoveAt(n); | |
575 | @endcode | |
576 | ||
577 | See also WX_CLEAR_ARRAY() macro which deletes all elements of a wxArray | |
578 | (supposed to contain pointers). | |
23324ae1 | 579 | */ |
2efaf754 | 580 | void RemoveAt(size_t index, size_t count = 1); |
23324ae1 | 581 | |
0c1fe6e9 | 582 | //@} |
3c4f71cc | 583 | |
3c4f71cc | 584 | |
0c1fe6e9 BP |
585 | /** |
586 | @name Searching and Sorting | |
587 | */ | |
588 | //@{ | |
3c4f71cc | 589 | |
0c1fe6e9 BP |
590 | /** |
591 | This version of Index() is for wxArray and wxObjArray only. | |
592 | ||
593 | Searches the element in the array, starting from either beginning or | |
594 | the end depending on the value of @a searchFromEnd parameter. | |
595 | @c wxNOT_FOUND is returned if the element is not found, otherwise the | |
596 | index of the element is returned. | |
597 | ||
598 | @note Even for wxObjArray classes, the operator "==" of the elements in | |
599 | the array is @b not used by this function. It searches exactly | |
600 | the given element in the array and so will only succeed if this | |
601 | element had been previously added to the array, but fail even if | |
602 | another, identical, element is in the array. | |
23324ae1 | 603 | */ |
0c1fe6e9 | 604 | int Index(T& item, bool searchFromEnd = false) const; |
2efaf754 | 605 | |
0c1fe6e9 BP |
606 | /** |
607 | This version of Index() is for wxSortedArray only. | |
23324ae1 | 608 | |
72a4fa54 VZ |
609 | Searches for the element in the array, using binary search. |
610 | ||
0c1fe6e9 BP |
611 | @c wxNOT_FOUND is returned if the element is not found, otherwise the |
612 | index of the element is returned. | |
613 | */ | |
2efaf754 | 614 | int Index(T& item) const; |
23324ae1 FM |
615 | |
616 | /** | |
0c1fe6e9 BP |
617 | Search for a place to insert @a item into the sorted array (binary |
618 | search). The index returned is just before the first existing item that | |
619 | is greater or equal (according to the compare function) to the given | |
620 | @a item. | |
3c4f71cc | 621 | |
0c1fe6e9 BP |
622 | You have to do extra work to know if the @a item already exists in |
623 | array. | |
3c4f71cc | 624 | |
0c1fe6e9 BP |
625 | This function is useful in conjunction with AddAt() for a common |
626 | operation of "insert only if not found". | |
23324ae1 | 627 | */ |
0c1fe6e9 | 628 | size_t IndexForInsert(T item) const; |
23324ae1 FM |
629 | |
630 | /** | |
0c1fe6e9 BP |
631 | The notation @c "CMPFUNCT<T>" should be read as if we had the following |
632 | declaration: | |
3c4f71cc | 633 | |
0c1fe6e9 BP |
634 | @code |
635 | template int CMPFUNC(T *first, T *second); | |
636 | @endcode | |
23324ae1 | 637 | |
0c1fe6e9 BP |
638 | Where @e T is the type of the array elements. I.e. it is a function |
639 | returning @e int which is passed two arguments of type @e T*. | |
23324ae1 | 640 | |
0c1fe6e9 BP |
641 | Sorts the array using the specified compare function: this function |
642 | should return a negative, zero or positive value according to whether | |
643 | the first element passed to it is less than, equal to or greater than | |
644 | the second one. | |
3c4f71cc | 645 | |
23324ae1 FM |
646 | wxSortedArray doesn't have this function because it is always sorted. |
647 | */ | |
648 | void Sort(CMPFUNC<T> compareFunction); | |
649 | ||
23324ae1 FM |
650 | //@} |
651 | }; | |
e54c96f1 | 652 | |
6b4a130c FM |
653 | |
654 | /** | |
bf505dfc FM |
655 | This macro may be used to append all elements of the @a wxArray_arrayToBeAppended |
656 | array to the @a wxArray_arrayToModify. The two arrays must be of the same type. | |
6b4a130c | 657 | */ |
bf505dfc | 658 | #define WX_APPEND_ARRAY(wxArray_arrayToModify, wxArray_arrayToBeAppended) |
6b4a130c FM |
659 | |
660 | /** | |
0c1fe6e9 BP |
661 | This macro may be used to delete all elements of the array before emptying |
662 | it. It can not be used with wxObjArrays - but they will delete their | |
663 | elements anyway when you call Empty(). | |
6b4a130c | 664 | */ |
bf505dfc | 665 | #define WX_CLEAR_ARRAY(wxArray_arrayToBeCleared) |
6b4a130c FM |
666 | |
667 | //@{ | |
668 | /** | |
669 | This macro declares a new object array class named @a name and containing | |
0c1fe6e9 BP |
670 | the elements of type @e T. |
671 | ||
672 | An exported array is used when compiling wxWidgets as a DLL under Windows | |
673 | and the array needs to be visible outside the DLL. An user exported array | |
6b4a130c | 674 | needed for exporting an array from a user DLL. |
0c1fe6e9 | 675 | |
6b4a130c FM |
676 | Example: |
677 | ||
0c1fe6e9 BP |
678 | @code |
679 | class MyClass; | |
680 | WX_DECLARE_OBJARRAY(MyClass, wxArrayOfMyClass); // note: not "MyClass *"! | |
681 | @endcode | |
682 | ||
683 | You must use WX_DEFINE_OBJARRAY() macro to define the array class, | |
684 | otherwise you would get link errors. | |
6b4a130c | 685 | */ |
0c1fe6e9 BP |
686 | #define WX_DECLARE_OBJARRAY(T, name) |
687 | #define WX_DECLARE_EXPORTED_OBJARRAY(T, name) | |
688 | #define WX_DECLARE_USER_EXPORTED_OBJARRAY(T, name) | |
6b4a130c FM |
689 | //@} |
690 | ||
691 | //@{ | |
692 | /** | |
693 | This macro defines a new array class named @a name and containing the | |
0c1fe6e9 BP |
694 | elements of type @a T. |
695 | ||
696 | An exported array is used when compiling wxWidgets as a DLL under Windows | |
697 | and the array needs to be visible outside the DLL. An user exported array | |
6b4a130c | 698 | needed for exporting an array from a user DLL. |
0c1fe6e9 | 699 | |
6b4a130c FM |
700 | Example: |
701 | ||
0c1fe6e9 BP |
702 | @code |
703 | WX_DEFINE_ARRAY_INT(int, MyArrayInt); | |
704 | ||
705 | class MyClass; | |
706 | WX_DEFINE_ARRAY(MyClass *, ArrayOfMyClass); | |
707 | @endcode | |
708 | ||
709 | Note that wxWidgets predefines the following standard array classes: | |
710 | @b wxArrayInt, @b wxArrayLong, @b wxArrayShort, @b wxArrayDouble, | |
711 | @b wxArrayPtrVoid. | |
6b4a130c | 712 | */ |
0c1fe6e9 BP |
713 | #define WX_DEFINE_ARRAY(T, name) |
714 | #define WX_DEFINE_EXPORTED_ARRAY(T, name) | |
715 | #define WX_DEFINE_USER_EXPORTED_ARRAY(T, name, exportspec) | |
6b4a130c FM |
716 | //@} |
717 | ||
718 | //@{ | |
719 | /** | |
0c1fe6e9 BP |
720 | This macro defines the methods of the array class @a name not defined by |
721 | the WX_DECLARE_OBJARRAY() macro. You must include the file | |
722 | @<wx/arrimpl.cpp@> before using this macro and you must have the full | |
723 | declaration of the class of array elements in scope! If you forget to do | |
724 | the first, the error will be caught by the compiler, but, unfortunately, | |
725 | many compilers will not give any warnings if you forget to do the second - | |
726 | but the objects of the class will not be copied correctly and their real | |
727 | destructor will not be called. | |
728 | ||
729 | An exported array is used when compiling wxWidgets as a DLL under Windows | |
730 | and the array needs to be visible outside the DLL. An user exported array | |
731 | needed for exporting an array from a user DLL. | |
732 | ||
6b4a130c | 733 | Example of usage: |
0c1fe6e9 BP |
734 | |
735 | @code | |
736 | // first declare the class! | |
737 | class MyClass | |
738 | { | |
739 | public: | |
740 | MyClass(const MyClass&); | |
741 | ||
742 | // ... | |
743 | ||
744 | virtual ~MyClass(); | |
745 | }; | |
746 | ||
747 | #include <wx/arrimpl.cpp> | |
748 | WX_DEFINE_OBJARRAY(wxArrayOfMyClass); | |
749 | @endcode | |
6b4a130c | 750 | */ |
0c1fe6e9 BP |
751 | #define WX_DEFINE_OBJARRAY(name) |
752 | #define WX_DEFINE_EXPORTED_OBJARRAY(name) | |
753 | #define WX_DEFINE_USER_EXPORTED_OBJARRAY(name) | |
6b4a130c FM |
754 | //@} |
755 | ||
756 | //@{ | |
757 | /** | |
758 | This macro defines a new sorted array class named @a name and containing | |
0c1fe6e9 BP |
759 | the elements of type @e T. |
760 | ||
761 | An exported array is used when compiling wxWidgets as a DLL under Windows | |
762 | and the array needs to be visible outside the DLL. An user exported array | |
6b4a130c | 763 | needed for exporting an array from a user DLL. |
0c1fe6e9 | 764 | |
6b4a130c FM |
765 | Example: |
766 | ||
0c1fe6e9 BP |
767 | @code |
768 | WX_DEFINE_SORTED_ARRAY_INT(int, MySortedArrayInt); | |
769 | ||
770 | class MyClass; | |
771 | WX_DEFINE_SORTED_ARRAY(MyClass *, ArrayOfMyClass); | |
772 | @endcode | |
773 | ||
774 | You will have to initialize the objects of this class by passing a | |
775 | comparison function to the array object constructor like this: | |
776 | ||
777 | @code | |
778 | int CompareInts(int n1, int n2) | |
779 | { | |
780 | return n1 - n2; | |
781 | } | |
782 | ||
783 | MySortedArrayInt sorted(CompareInts); | |
784 | ||
785 | int CompareMyClassObjects(MyClass *item1, MyClass *item2) | |
786 | { | |
787 | // sort the items by their address... | |
788 | return Stricmp(item1->GetAddress(), item2->GetAddress()); | |
789 | } | |
790 | ||
791 | ArrayOfMyClass another(CompareMyClassObjects); | |
792 | @endcode | |
6b4a130c | 793 | */ |
0c1fe6e9 BP |
794 | #define WX_DEFINE_SORTED_ARRAY(T, name) |
795 | #define WX_DEFINE_SORTED_EXPORTED_ARRAY(T, name) | |
796 | #define WX_DEFINE_SORTED_USER_EXPORTED_ARRAY(T, name) | |
6b4a130c FM |
797 | //@} |
798 | ||
799 | /** | |
bf505dfc FM |
800 | This macro may be used to prepend all elements of the @a wxArray_arrayToBePrepended |
801 | array to the @a wxArray_arrayToModify. The two arrays must be of the same type. | |
6b4a130c | 802 | */ |
bf505dfc | 803 | #define WX_PREPEND_ARRAY(wxArray_arrayToModify, wxArray_arrayToBePrepended) |
0c1fe6e9 | 804 | |
1e0e263e FM |
805 | //@{ |
806 | /** | |
807 | Predefined specialization of wxArray<T> for standard types. | |
808 | */ | |
809 | typedef wxArray<int> wxArrayInt; | |
810 | typedef wxArray<long> wxArrayLong; | |
811 | typedef wxArray<short> wxArrayShort; | |
812 | typedef wxArray<double> wxArrayDouble; | |
813 | typedef wxArray<void*> wxArrayPtrVoid; | |
814 | //@} |