814 lines
29 KiB
C
814 lines
29 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: dynarray.h
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// Purpose: interface of wxArray<T>
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// Author: wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/**
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This section describes the so called @e "dynamic arrays". This is a C
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array-like type safe data structure i.e. the member access time is constant
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(and not linear according to the number of container elements as for linked
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lists). However, these arrays are dynamic in the sense that they will
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automatically allocate more memory if there is not enough of it for adding
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a new element. They also perform range checking on the index values but in
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debug mode only, so please be sure to compile your application in debug
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mode to use it (see @ref overview_debugging for details). So, unlike the
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arrays in some other languages, attempt to access an element beyond the
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arrays bound doesn't automatically expand the array but provokes an
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assertion failure instead in debug build and does nothing (except possibly
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crashing your program) in the release build.
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The array classes were designed to be reasonably efficient, both in terms
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of run-time speed and memory consumption and the executable size. The speed
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of array item access is, of course, constant (independent of the number of
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elements) making them much more efficient than linked lists (wxList).
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Adding items to the arrays is also implemented in more or less constant
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time, but the price is preallocating the memory in advance. In the
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"memory management" function section, you may find some useful hints about
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optimizing wxArray memory usage. As for executable size, all wxArray
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functions are inline, so they do not take @e any space at all.
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wxWidgets has three different kinds of array. All of them derive from
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wxBaseArray class which works with untyped data and cannot be used
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directly. The standard macros WX_DEFINE_ARRAY(), WX_DEFINE_SORTED_ARRAY()
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and WX_DEFINE_OBJARRAY() are used to define a new class deriving from it.
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The classes declared will be called in this documentation wxArray,
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wxSortedArray and wxObjArray but you should keep in mind that no classes
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with such names actually exist, each time you use one of the
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WX_DEFINE_XXXARRAY() macros, you define a class with a new name. In fact,
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these names are "template" names and each usage of one of the macros
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mentioned above creates a template specialization for the given element
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type.
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wxArray is suitable for storing integer types and pointers which it does
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not treat as objects in any way, i.e. the element pointed to by the pointer
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is not deleted when the element is removed from the array. It should be
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noted that all of wxArray's functions are inline, so it costs strictly
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nothing to define as many array types as you want (either in terms of the
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executable size or the speed) as long as at least one of them is defined
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and this is always the case because wxArrays are used by wxWidgets
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internally. This class has one serious limitation: it can only be used for
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storing integral types (bool, char, short, int, long and their unsigned
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variants) or pointers (of any kind). An attempt to use with objects of
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@c sizeof() greater than @c sizeof(long) will provoke a runtime assertion
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failure, however declaring a wxArray of floats will not (on the machines
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where @c "sizeof(float) <= sizeof(long)"), yet it will @b not work, please
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use wxObjArray for storing floats and doubles.
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wxSortedArray is a wxArray variant which should be used when searching in
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the array is a frequently used operation. It requires you to define an
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additional function for comparing two elements of the array element type
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and always stores its items in the sorted order (according to this
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function). Thus, its Index() function execution time is @c "O(log(N))"
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instead of @c "O(N)" for the usual arrays but the Add() method is slower:
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it is @c "O(log(N))" instead of constant time (neglecting time spent in
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memory allocation routine). However, in a usual situation elements are
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added to an array much less often than searched inside it, so wxSortedArray
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may lead to huge performance improvements compared to wxArray. Finally, it
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should be noticed that, as wxArray, wxSortedArray can be only used for
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storing integral types or pointers.
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wxObjArray class treats its elements like "objects". It may delete them
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when they are removed from the array (invoking the correct destructor) and
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copies them using the objects copy constructor. In order to implement this
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behaviour the definition of the wxObjArray arrays is split in two parts:
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first, you should declare the new wxObjArray class using the
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WX_DECLARE_OBJARRAY() macro and then you must include the file defining the
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implementation of template type: @<wx/arrimpl.cpp@> and define the array
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class with the WX_DEFINE_OBJARRAY() macro from a point where the full (as
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opposed to 'forward') declaration of the array elements class is in scope.
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As it probably sounds very complicated here is an example:
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@code
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#include <wx/dynarray.h>
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// We must forward declare the array because it is used
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// inside the class declaration.
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class MyDirectory;
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class MyFile;
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// This defines two new types: ArrayOfDirectories and ArrayOfFiles which
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// can be now used as shown below.
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WX_DECLARE_OBJARRAY(MyDirectory, ArrayOfDirectories);
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WX_DECLARE_OBJARRAY(MyFile, ArrayOfFiles);
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class MyDirectory
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{
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// ...
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ArrayOfDirectories m_subdirectories; // All subdirectories
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ArrayOfFiles m_files; // All files in this directory
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};
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// ...
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// Now that we have MyDirectory declaration in scope we may finish the
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// definition of ArrayOfDirectories -- note that this expands into some C++
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// code and so should only be compiled once (i.e., don't put this in the
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// header, but into a source file or you will get linking errors)
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#include <wx/arrimpl.cpp> // This is a magic incantation which must be done!
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WX_DEFINE_OBJARRAY(ArrayOfDirectories);
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// that's all!
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@endcode
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It is not as elegant as writing this:
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@code
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typedef std::vector<MyDirectory> ArrayOfDirectories;
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@endcode
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But is not that complicated and allows the code to be compiled with any,
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however dumb, C++ compiler in the world.
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Remember to include @<wx/arrimpl.cpp@> just before each
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WX_DEFINE_OBJARRAY() occurrence in your code, even if you have several in
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the same file.
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Things are much simpler for wxArray and wxSortedArray however: it is enough
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just to write:
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@code
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WX_DEFINE_ARRAY_INT(int, ArrayOfInts);
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WX_DEFINE_SORTED_ARRAY_INT(int, ArrayOfSortedInts);
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@endcode
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There is only one @c DEFINE macro and no need for separate @c DECLARE one.
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For the arrays of the primitive types, the macros
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@c WX_DEFINE_ARRAY_CHAR/SHORT/INT/SIZE_T/LONG/DOUBLE should be used
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depending on the sizeof of the values (notice that storing values of
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smaller type, e.g. shorts, in an array of larger one, e.g. @c ARRAY_INT,
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does not work on all architectures!).
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@section array_macros Macros for Template Array Definition
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To use an array you must first define the array class. This is done with
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the help of the macros in this section. The class of array elements must be
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(at least) forward declared for WX_DEFINE_ARRAY(), WX_DEFINE_SORTED_ARRAY()
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and WX_DECLARE_OBJARRAY() macros and must be fully declared before you use
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WX_DEFINE_OBJARRAY() macro.
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- WX_DEFINE_ARRAY()
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- WX_DEFINE_EXPORTED_ARRAY()
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- WX_DEFINE_USER_EXPORTED_ARRAY()
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- WX_DEFINE_SORTED_ARRAY()
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- WX_DEFINE_SORTED_EXPORTED_ARRAY()
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- WX_DEFINE_SORTED_USER_EXPORTED_ARRAY()
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- WX_DECLARE_EXPORTED_OBJARRAY()
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- WX_DECLARE_USER_EXPORTED_OBJARRAY()
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- WX_DEFINE_OBJARRAY()
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- WX_DEFINE_EXPORTED_OBJARRAY()
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- WX_DEFINE_USER_EXPORTED_OBJARRAY()
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To slightly complicate the matters even further, the operator "->" defined
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by default for the array iterators by these macros only makes sense if the
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array element type is not a pointer itself and, although it still works,
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this provokes warnings from some compilers and to avoid them you should use
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the @c _PTR versions of the macros above. For example, to define an array
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of pointers to @c double you should use:
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@code
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WX_DEFINE_ARRAY_PTR(double *, MyArrayOfDoublePointers);
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@endcode
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Note that the above macros are generally only useful for wxObject types.
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There are separate macros for declaring an array of a simple type, such as
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an int.
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The following simple types are supported:
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- @c int
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- @c long
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- @c size_t
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- @c double
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To create an array of a simple type, simply append the type you want in
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CAPS to the array definition.
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For example, you'd use one of the following variants for an integer array:
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- WX_DEFINE_ARRAY_INT()
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- WX_DEFINE_EXPORTED_ARRAY_INT()
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- WX_DEFINE_USER_EXPORTED_ARRAY_INT()
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- WX_DEFINE_SORTED_ARRAY_INT()
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- WX_DEFINE_SORTED_EXPORTED_ARRAY_INT()
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- WX_DEFINE_SORTED_USER_EXPORTED_ARRAY_INT()
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@section array_predef Predefined array types
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wxWidgets defines the following dynamic array types:
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- ::wxArrayShort
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- ::wxArrayInt
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- ::wxArrayDouble
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- ::wxArrayLong
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- ::wxArrayPtrVoid
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To use them you don't need any macro; you just need to include @c dynarray.h.
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@library{wxbase}
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@category{containers}
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@see @ref overview_container, wxList<T>, wxVector<T>
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*/
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template <typename T>
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class wxArray<T>
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{
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public:
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/**
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@name Constructors and Destructors
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Array classes are 100% C++ objects and as such they have the
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appropriate copy constructors and assignment operators. Copying wxArray
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just copies the elements but copying wxObjArray copies the arrays
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items. However, for memory-efficiency sake, neither of these classes
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has virtual destructor. It is not very important for wxArray which has
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trivial destructor anyhow, but it does mean that you should avoid
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deleting wxObjArray through a wxBaseArray pointer (as you would never
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use wxBaseArray anyhow it shouldn't be a problem) and that you should
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not derive your own classes from the array classes.
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*/
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//@{
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/**
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Default constructor.
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*/
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wxArray();
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/**
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Default constructor initializes an empty array object.
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*/
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wxObjArray();
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/**
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There is no default constructor for wxSortedArray classes - you must
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initialize it with a function to use for item comparison. It is a
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function which is passed two arguments of type @c T where @c T is the
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array element type and which should return a negative, zero or positive
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value according to whether the first element passed to it is less than,
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equal to or greater than the second one.
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*/
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wxSortedArray(int (*)(T first, T second)compareFunction);
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/**
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Performs a shallow array copy (i.e.\ doesn't copy the objects pointed to
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even if the source array contains the items of pointer type).
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*/
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wxArray(const wxArray& array);
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/**
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Performs a shallow array copy (i.e.\ doesn't copy the objects pointed to
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even if the source array contains the items of pointer type).
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*/
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wxSortedArray(const wxSortedArray& array);
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/**
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Performs a deep copy (i.e.\ the array element are copied too).
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*/
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wxObjArray(const wxObjArray& array);
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/**
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Performs a shallow array copy (i.e.\ doesn't copy the objects pointed to
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even if the source array contains the items of pointer type).
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*/
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wxArray& operator=(const wxArray& array);
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/**
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Performs a shallow array copy (i.e.\ doesn't copy the objects pointed to
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even if the source array contains the items of pointer type).
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*/
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wxSortedArray& operator=(const wxSortedArray& array);
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/**
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Performs a deep copy (i.e.\ the array element are copied too).
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*/
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wxObjArray& operator=(const wxObjArray& array);
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/**
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This destructor does not delete all the items owned by the array, you
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may use the WX_CLEAR_ARRAY() macro for this.
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*/
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~wxArray();
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/**
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This destructor does not delete all the items owned by the array, you
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may use the WX_CLEAR_ARRAY() macro for this.
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*/
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~wxSortedArray();
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/**
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This destructor deletes all the items owned by the array.
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*/
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~wxObjArray();
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//@}
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/**
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@name Memory Management
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Automatic array memory management is quite trivial: the array starts by
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preallocating some minimal amount of memory (defined by
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@c WX_ARRAY_DEFAULT_INITIAL_SIZE) and when further new items exhaust
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already allocated memory it reallocates it adding 50% of the currently
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allocated amount, but no more than some maximal number which is defined
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by the @c ARRAY_MAXSIZE_INCREMENT constant. Of course, this may lead to
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some memory being wasted (@c ARRAY_MAXSIZE_INCREMENT in the worst case,
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i.e. 4Kb in the current implementation), so the Shrink() function is
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provided to deallocate the extra memory. The Alloc() function can also
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be quite useful if you know in advance how many items you are going to
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put in the array and will prevent the array code from reallocating the
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memory more times than needed.
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*/
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//@{
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/**
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Preallocates memory for a given number of array elements. It is worth
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calling when the number of items which are going to be added to the
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array is known in advance because it will save unneeded memory
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reallocation. If the array already has enough memory for the given
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number of items, nothing happens. In any case, the existing contents of
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the array is not modified.
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*/
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void Alloc(size_t count);
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/**
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Frees all memory unused by the array. If the program knows that no new
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items will be added to the array it may call Shrink() to reduce its
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memory usage. However, if a new item is added to the array, some extra
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memory will be allocated again.
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*/
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void Shrink();
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//@}
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/**
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@name Number of Elements and Simple Item Access
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Functions in this section return the total number of array elements and
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allow to retrieve them - possibly using just the C array indexing []
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operator which does exactly the same as the Item() method.
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*/
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//@{
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/**
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Return the number of items in the array.
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*/
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size_t GetCount() const;
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/**
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Returns @true if the array is empty, @false otherwise.
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*/
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bool IsEmpty() const;
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/**
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Returns the item at the given position in the array. If @a index is out
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of bounds, an assert failure is raised in the debug builds but nothing
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special is done in the release build.
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The returned value is of type "reference to the array element type" for
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all of the array classes.
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*/
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T& Item(size_t index) const;
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/**
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Returns the last element in the array, i.e.\ is the same as calling
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"Item(GetCount() - 1)". An assert failure is raised in the debug mode
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if the array is empty.
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The returned value is of type "reference to the array element type" for
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all of the array classes.
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*/
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T& Last() const;
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//@}
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/**
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@name Adding Items
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*/
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//@{
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/**
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Appends the given number of @a copies of the @a item to the array
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consisting of the elements of type @c T.
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This version is used with wxArray.
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You may also use WX_APPEND_ARRAY() macro to append all elements of one
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array to another one but it is more efficient to use the @a copies
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parameter and modify the elements in place later if you plan to append
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a lot of items.
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*/
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void Add(T item, size_t copies = 1);
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/**
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Appends the @a item to the array consisting of the elements of type
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@c T.
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This version is used with wxSortedArray, returning the index where
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@a item is stored.
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*/
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size_t Add(T item);
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/**
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Appends the @a item to the array consisting of the elements of type
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@c T.
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This version is used with wxObjArray. The array will take ownership of
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the @a item, deleting it when the item is deleted from the array. Note
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that you cannot append more than one pointer as reusing it would lead
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to deleting it twice (or more) resulting in a crash.
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||
|
You may also use WX_APPEND_ARRAY() macro to append all elements of one
|
||
|
array to another one but it is more efficient to use the @a copies
|
||
|
parameter and modify the elements in place later if you plan to append
|
||
|
a lot of items.
|
||
|
*/
|
||
|
void Add(T* item);
|
||
|
|
||
|
/**
|
||
|
Appends the given number of @a copies of the @a item to the array
|
||
|
consisting of the elements of type @c T.
|
||
|
|
||
|
This version is used with wxObjArray. The array will make a copy of the
|
||
|
item and will not take ownership of the original item.
|
||
|
|
||
|
You may also use WX_APPEND_ARRAY() macro to append all elements of one
|
||
|
array to another one but it is more efficient to use the @a copies
|
||
|
parameter and modify the elements in place later if you plan to append
|
||
|
a lot of items.
|
||
|
*/
|
||
|
void Add(T& item, size_t copies = 1);
|
||
|
|
||
|
/**
|
||
|
Inserts the given @a item into the array in the specified @e index
|
||
|
position.
|
||
|
|
||
|
Be aware that you will set out the order of the array if you give a
|
||
|
wrong position.
|
||
|
|
||
|
This function is useful in conjunction with IndexForInsert() for a
|
||
|
common operation of "insert only if not found".
|
||
|
*/
|
||
|
void AddAt(T item, size_t index);
|
||
|
|
||
|
/**
|
||
|
Insert the given number of @a copies of the @a item into the array
|
||
|
before the existing item @a n - thus, @e Insert(something, 0u) will
|
||
|
insert an item in such way that it will become the first array element.
|
||
|
|
||
|
wxSortedArray doesn't have this function because inserting in wrong
|
||
|
place would break its sorted condition.
|
||
|
|
||
|
Please see Add() for an explanation of the differences between the
|
||
|
overloaded versions of this function.
|
||
|
*/
|
||
|
void Insert(T item, size_t n, size_t copies = 1);
|
||
|
|
||
|
/**
|
||
|
Insert the @a item into the array before the existing item @a n - thus,
|
||
|
@e Insert(something, 0u) will insert an item in such way that it will
|
||
|
become the first array element.
|
||
|
|
||
|
wxSortedArray doesn't have this function because inserting in wrong
|
||
|
place would break its sorted condition.
|
||
|
|
||
|
Please see Add() for an explanation of the differences between the
|
||
|
overloaded versions of this function.
|
||
|
*/
|
||
|
void Insert(T* item, size_t n);
|
||
|
|
||
|
/**
|
||
|
Insert the given number of @a copies of the @a item into the array
|
||
|
before the existing item @a n - thus, @e Insert(something, 0u) will
|
||
|
insert an item in such way that it will become the first array element.
|
||
|
|
||
|
wxSortedArray doesn't have this function because inserting in wrong
|
||
|
place would break its sorted condition.
|
||
|
|
||
|
Please see Add() for an explanation of the differences between the
|
||
|
overloaded versions of this function.
|
||
|
*/
|
||
|
void Insert(T& item, size_t n, size_t copies = 1);
|
||
|
|
||
|
/**
|
||
|
This function ensures that the number of array elements is at least
|
||
|
@a count. If the array has already @a count or more items, nothing is
|
||
|
done. Otherwise, @a count - GetCount() elements are added and
|
||
|
initialized to the value @a defval.
|
||
|
|
||
|
@see GetCount()
|
||
|
*/
|
||
|
void SetCount(size_t count, T defval = T(0));
|
||
|
|
||
|
//@}
|
||
|
|
||
|
|
||
|
/**
|
||
|
@name Removing Items
|
||
|
*/
|
||
|
//@{
|
||
|
|
||
|
/**
|
||
|
This function does the same as Empty() and additionally frees the
|
||
|
memory allocated to the array.
|
||
|
*/
|
||
|
void Clear();
|
||
|
|
||
|
/**
|
||
|
Removes the element from the array, but unlike Remove(), it doesn't
|
||
|
delete it. The function returns the pointer to the removed element.
|
||
|
*/
|
||
|
T* Detach(size_t index);
|
||
|
|
||
|
/**
|
||
|
Empties the array. For wxObjArray classes, this destroys all of the
|
||
|
array elements. For wxArray and wxSortedArray this does nothing except
|
||
|
marking the array of being empty - this function does not free the
|
||
|
allocated memory, use Clear() for this.
|
||
|
*/
|
||
|
void Empty();
|
||
|
|
||
|
/**
|
||
|
Removes an element from the array by value: the first item of the array
|
||
|
equal to @a item is removed, an assert failure will result from an
|
||
|
attempt to remove an item which doesn't exist in the array.
|
||
|
|
||
|
When an element is removed from wxObjArray it is deleted by the array -
|
||
|
use Detach() if you don't want this to happen. On the other hand, when
|
||
|
an object is removed from a wxArray nothing happens - you should delete
|
||
|
it manually if required:
|
||
|
|
||
|
@code
|
||
|
T *item = array[n];
|
||
|
array.Remove(item);
|
||
|
delete item;
|
||
|
@endcode
|
||
|
|
||
|
See also WX_CLEAR_ARRAY() macro which deletes all elements of a wxArray
|
||
|
(supposed to contain pointers).
|
||
|
|
||
|
Notice that for sorted arrays this method uses binary search to find
|
||
|
the item so it doesn't necessarily remove the first matching item, but
|
||
|
the first one found by the binary search.
|
||
|
|
||
|
@see RemoveAt()
|
||
|
*/
|
||
|
void Remove(T item);
|
||
|
|
||
|
/**
|
||
|
Removes @a count elements starting at @a index from the array. When an
|
||
|
element is removed from wxObjArray it is deleted by the array - use
|
||
|
Detach() if you don't want this to happen. On the other hand, when an
|
||
|
object is removed from a wxArray nothing happens - you should delete it
|
||
|
manually if required:
|
||
|
|
||
|
@code
|
||
|
T *item = array[n];
|
||
|
delete item;
|
||
|
array.RemoveAt(n);
|
||
|
@endcode
|
||
|
|
||
|
See also WX_CLEAR_ARRAY() macro which deletes all elements of a wxArray
|
||
|
(supposed to contain pointers).
|
||
|
*/
|
||
|
void RemoveAt(size_t index, size_t count = 1);
|
||
|
|
||
|
//@}
|
||
|
|
||
|
|
||
|
/**
|
||
|
@name Searching and Sorting
|
||
|
*/
|
||
|
//@{
|
||
|
|
||
|
/**
|
||
|
This version of Index() is for wxArray and wxObjArray only.
|
||
|
|
||
|
Searches the element in the array, starting from either beginning or
|
||
|
the end depending on the value of @a searchFromEnd parameter.
|
||
|
@c wxNOT_FOUND is returned if the element is not found, otherwise the
|
||
|
index of the element is returned.
|
||
|
|
||
|
@note Even for wxObjArray classes, the operator "==" of the elements in
|
||
|
the array is @b not used by this function. It searches exactly
|
||
|
the given element in the array and so will only succeed if this
|
||
|
element had been previously added to the array, but fail even if
|
||
|
another, identical, element is in the array.
|
||
|
*/
|
||
|
int Index(T& item, bool searchFromEnd = false) const;
|
||
|
|
||
|
/**
|
||
|
This version of Index() is for wxSortedArray only.
|
||
|
|
||
|
Searches for the element in the array, using binary search.
|
||
|
|
||
|
@c wxNOT_FOUND is returned if the element is not found, otherwise the
|
||
|
index of the element is returned.
|
||
|
*/
|
||
|
int Index(T& item) const;
|
||
|
|
||
|
/**
|
||
|
Search for a place to insert @a item into the sorted array (binary
|
||
|
search). The index returned is just before the first existing item that
|
||
|
is greater or equal (according to the compare function) to the given
|
||
|
@a item.
|
||
|
|
||
|
You have to do extra work to know if the @a item already exists in
|
||
|
array.
|
||
|
|
||
|
This function is useful in conjunction with AddAt() for a common
|
||
|
operation of "insert only if not found".
|
||
|
*/
|
||
|
size_t IndexForInsert(T item) const;
|
||
|
|
||
|
/**
|
||
|
The notation @c "CMPFUNCT<T>" should be read as if we had the following
|
||
|
declaration:
|
||
|
|
||
|
@code
|
||
|
template int CMPFUNC(T *first, T *second);
|
||
|
@endcode
|
||
|
|
||
|
Where @e T is the type of the array elements. I.e. it is a function
|
||
|
returning @e int which is passed two arguments of type @e T*.
|
||
|
|
||
|
Sorts the array using the specified compare function: this function
|
||
|
should return a negative, zero or positive value according to whether
|
||
|
the first element passed to it is less than, equal to or greater than
|
||
|
the second one.
|
||
|
|
||
|
wxSortedArray doesn't have this function because it is always sorted.
|
||
|
*/
|
||
|
void Sort(CMPFUNC<T> compareFunction);
|
||
|
|
||
|
//@}
|
||
|
};
|
||
|
|
||
|
|
||
|
/**
|
||
|
This macro may be used to append all elements of the @a wxArray_arrayToBeAppended
|
||
|
array to the @a wxArray_arrayToModify. The two arrays must be of the same type.
|
||
|
*/
|
||
|
#define WX_APPEND_ARRAY(wxArray_arrayToModify, wxArray_arrayToBeAppended)
|
||
|
|
||
|
/**
|
||
|
This macro may be used to delete all elements of the array before emptying
|
||
|
it. It cannot be used with wxObjArrays - but they will delete their
|
||
|
elements anyway when you call Empty().
|
||
|
*/
|
||
|
#define WX_CLEAR_ARRAY(wxArray_arrayToBeCleared)
|
||
|
|
||
|
//@{
|
||
|
/**
|
||
|
This macro declares a new object array class named @a name and containing
|
||
|
the elements of type @e T.
|
||
|
|
||
|
An exported array is used when compiling wxWidgets as a DLL under Windows
|
||
|
and the array needs to be visible outside the DLL. An user exported array
|
||
|
needed for exporting an array from a user DLL.
|
||
|
|
||
|
Example:
|
||
|
|
||
|
@code
|
||
|
class MyClass;
|
||
|
WX_DECLARE_OBJARRAY(MyClass, wxArrayOfMyClass); // note: not "MyClass *"!
|
||
|
@endcode
|
||
|
|
||
|
You must use WX_DEFINE_OBJARRAY() macro to define the array class,
|
||
|
otherwise you would get link errors.
|
||
|
*/
|
||
|
#define WX_DECLARE_OBJARRAY(T, name)
|
||
|
#define WX_DECLARE_EXPORTED_OBJARRAY(T, name)
|
||
|
#define WX_DECLARE_USER_EXPORTED_OBJARRAY(T, name, expmode)
|
||
|
//@}
|
||
|
|
||
|
//@{
|
||
|
/**
|
||
|
This macro defines a new array class named @a name and containing the
|
||
|
elements of type @a T.
|
||
|
|
||
|
An exported array is used when compiling wxWidgets as a DLL under Windows
|
||
|
and the array needs to be visible outside the DLL. An user exported array
|
||
|
needed for exporting an array from a user DLL.
|
||
|
|
||
|
Example:
|
||
|
|
||
|
@code
|
||
|
WX_DEFINE_ARRAY_INT(int, MyArrayInt);
|
||
|
|
||
|
class MyClass;
|
||
|
WX_DEFINE_ARRAY(MyClass *, ArrayOfMyClass);
|
||
|
@endcode
|
||
|
|
||
|
Note that wxWidgets predefines the following standard array classes:
|
||
|
@b wxArrayInt, @b wxArrayLong, @b wxArrayShort, @b wxArrayDouble,
|
||
|
@b wxArrayPtrVoid.
|
||
|
*/
|
||
|
#define WX_DEFINE_ARRAY(T, name)
|
||
|
#define WX_DEFINE_EXPORTED_ARRAY(T, name)
|
||
|
#define WX_DEFINE_USER_EXPORTED_ARRAY(T, name, exportspec)
|
||
|
//@}
|
||
|
|
||
|
//@{
|
||
|
/**
|
||
|
This macro defines the methods of the array class @a name not defined by
|
||
|
the WX_DECLARE_OBJARRAY() macro. You must include the file
|
||
|
@<wx/arrimpl.cpp@> before using this macro and you must have the full
|
||
|
declaration of the class of array elements in scope! If you forget to do
|
||
|
the first, the error will be caught by the compiler, but, unfortunately,
|
||
|
many compilers will not give any warnings if you forget to do the second -
|
||
|
but the objects of the class will not be copied correctly and their real
|
||
|
destructor will not be called.
|
||
|
|
||
|
An exported array is used when compiling wxWidgets as a DLL under Windows
|
||
|
and the array needs to be visible outside the DLL. An user exported array
|
||
|
needed for exporting an array from a user DLL.
|
||
|
|
||
|
Example of usage:
|
||
|
|
||
|
@code
|
||
|
// first declare the class!
|
||
|
class MyClass
|
||
|
{
|
||
|
public:
|
||
|
MyClass(const MyClass&);
|
||
|
|
||
|
// ...
|
||
|
|
||
|
virtual ~MyClass();
|
||
|
};
|
||
|
|
||
|
#include <wx/arrimpl.cpp>
|
||
|
WX_DEFINE_OBJARRAY(wxArrayOfMyClass);
|
||
|
@endcode
|
||
|
*/
|
||
|
#define WX_DEFINE_OBJARRAY(name)
|
||
|
#define WX_DEFINE_EXPORTED_OBJARRAY(name)
|
||
|
#define WX_DEFINE_USER_EXPORTED_OBJARRAY(name)
|
||
|
//@}
|
||
|
|
||
|
//@{
|
||
|
/**
|
||
|
This macro defines a new sorted array class named @a name and containing
|
||
|
the elements of type @e T.
|
||
|
|
||
|
An exported array is used when compiling wxWidgets as a DLL under Windows
|
||
|
and the array needs to be visible outside the DLL. An user exported array
|
||
|
needed for exporting an array from a user DLL.
|
||
|
|
||
|
Example:
|
||
|
|
||
|
@code
|
||
|
WX_DEFINE_SORTED_ARRAY_INT(int, MySortedArrayInt);
|
||
|
|
||
|
class MyClass;
|
||
|
WX_DEFINE_SORTED_ARRAY(MyClass *, ArrayOfMyClass);
|
||
|
@endcode
|
||
|
|
||
|
You will have to initialize the objects of this class by passing a
|
||
|
comparison function to the array object constructor like this:
|
||
|
|
||
|
@code
|
||
|
int CompareInts(int n1, int n2)
|
||
|
{
|
||
|
return n1 - n2;
|
||
|
}
|
||
|
|
||
|
MySortedArrayInt sorted(CompareInts);
|
||
|
|
||
|
int CompareMyClassObjects(MyClass *item1, MyClass *item2)
|
||
|
{
|
||
|
// sort the items by their address...
|
||
|
return Stricmp(item1->GetAddress(), item2->GetAddress());
|
||
|
}
|
||
|
|
||
|
ArrayOfMyClass another(CompareMyClassObjects);
|
||
|
@endcode
|
||
|
*/
|
||
|
#define WX_DEFINE_SORTED_ARRAY(T, name)
|
||
|
#define WX_DEFINE_SORTED_EXPORTED_ARRAY(T, name)
|
||
|
#define WX_DEFINE_SORTED_USER_EXPORTED_ARRAY(T, name, expmode)
|
||
|
//@}
|
||
|
|
||
|
/**
|
||
|
This macro may be used to prepend all elements of the @a wxArray_arrayToBePrepended
|
||
|
array to the @a wxArray_arrayToModify. The two arrays must be of the same type.
|
||
|
*/
|
||
|
#define WX_PREPEND_ARRAY(wxArray_arrayToModify, wxArray_arrayToBePrepended)
|
||
|
|
||
|
//@{
|
||
|
/**
|
||
|
Predefined specialization of wxArray<T> for standard types.
|
||
|
*/
|
||
|
typedef wxArray<int> wxArrayInt;
|
||
|
typedef wxArray<long> wxArrayLong;
|
||
|
typedef wxArray<short> wxArrayShort;
|
||
|
typedef wxArray<double> wxArrayDouble;
|
||
|
typedef wxArray<void*> wxArrayPtrVoid;
|
||
|
//@}
|