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<a href="#define-members">Macros</a> |
<a href="#func-members">Functions</a> </div>
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<div class="title">Runtime Type Information (RTTI)</div> </div>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>wxWidgets uses its own RTTI ("run-time type identification") system which predates the current standard C++ RTTI and so is kept for backwards compatibility reasons but also because it allows some things which the standard RTTI doesn't directly support (such as creating a class from its name). </p>
<p>The standard C++ RTTI can be used in the user code without any problems and in general you shouldn't need to use the functions and the macros in this section unless you are thinking of modifying or adding any wxWidgets classes.</p>
<p>Related Overviews: <a class="el" href="overview_rtti.html">Runtime Type Information (RTTI)</a></p>
<p>Related class group: <a class="el" href="group__group__class__rtti.html">Runtime Type Information (RTTI)</a> </p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:ga1523a2d553dea288d66cd35e8a0ffd5c"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga1523a2d553dea288d66cd35e8a0ffd5c">wxDECLARE_APP</a>(className)</td></tr>
<tr class="memdesc:ga1523a2d553dea288d66cd35e8a0ffd5c"><td class="mdescLeft"> </td><td class="mdescRight">This is used in headers to create a forward declaration of the <a class="el" href="group__group__funcmacro__appinitterm.html#gac387a69e740a149f9888e4992a3a4c6c" title="This function doesn't exist in wxWidgets but it is created by using the wxIMPLEMENT_APP() macro...">wxGetApp()</a> function implemented by <a class="el" href="group__group__funcmacro__rtti.html#ga967aafaa261481fe2d2e1cf599e3e003" title="This is used in the application class implementation file to make the application class known to wxWi...">wxIMPLEMENT_APP()</a>. <a href="#ga1523a2d553dea288d66cd35e8a0ffd5c"></a><br/></td></tr>
<tr class="separator:ga1523a2d553dea288d66cd35e8a0ffd5c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga967aafaa261481fe2d2e1cf599e3e003"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga967aafaa261481fe2d2e1cf599e3e003">wxIMPLEMENT_APP</a>(className)</td></tr>
<tr class="memdesc:ga967aafaa261481fe2d2e1cf599e3e003"><td class="mdescLeft"> </td><td class="mdescRight">This is used in the application class implementation file to make the application class known to wxWidgets for dynamic construction. <a href="#ga967aafaa261481fe2d2e1cf599e3e003"></a><br/></td></tr>
<tr class="separator:ga967aafaa261481fe2d2e1cf599e3e003"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gacee897a7d4e704e1aa53568220f2396e"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#gacee897a7d4e704e1aa53568220f2396e">wxCLASSINFO</a>(className)</td></tr>
<tr class="memdesc:gacee897a7d4e704e1aa53568220f2396e"><td class="mdescLeft"> </td><td class="mdescRight">Returns a pointer to the <a class="el" href="classwx_class_info.html" title="This class stores meta-information about classes.">wxClassInfo</a> object associated with this class. <a href="#gacee897a7d4e704e1aa53568220f2396e"></a><br/></td></tr>
<tr class="separator:gacee897a7d4e704e1aa53568220f2396e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga5bbb5821d56ac801da838c42105b72ae"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga5bbb5821d56ac801da838c42105b72ae">wxDECLARE_ABSTRACT_CLASS</a>(className)</td></tr>
<tr class="memdesc:ga5bbb5821d56ac801da838c42105b72ae"><td class="mdescLeft"> </td><td class="mdescRight">Used inside a class declaration to declare that the class should be made known to the class hierarchy, but objects of this class cannot be created dynamically. <a href="#ga5bbb5821d56ac801da838c42105b72ae"></a><br/></td></tr>
<tr class="separator:ga5bbb5821d56ac801da838c42105b72ae"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga9c252d076397bec5ac241272a7a60747"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga9c252d076397bec5ac241272a7a60747">wxDECLARE_DYNAMIC_CLASS</a>(className)</td></tr>
<tr class="memdesc:ga9c252d076397bec5ac241272a7a60747"><td class="mdescLeft"> </td><td class="mdescRight">Used inside a class declaration to make the class known to wxWidgets RTTI system and also declare that the objects of this class should be dynamically creatable from run-time type information. <a href="#ga9c252d076397bec5ac241272a7a60747"></a><br/></td></tr>
<tr class="separator:ga9c252d076397bec5ac241272a7a60747"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga20465fc7e022e29a5dacfad46e152e75"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga20465fc7e022e29a5dacfad46e152e75">wxDECLARE_CLASS</a>(className)</td></tr>
<tr class="memdesc:ga20465fc7e022e29a5dacfad46e152e75"><td class="mdescLeft"> </td><td class="mdescRight">Used inside a class declaration to declare that the class should be made known to the class hierarchy, but objects of this class cannot be created dynamically. <a href="#ga20465fc7e022e29a5dacfad46e152e75"></a><br/></td></tr>
<tr class="separator:ga20465fc7e022e29a5dacfad46e152e75"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga2f58f4ea4376a2e3994a9e6880509027"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga2f58f4ea4376a2e3994a9e6880509027">wxIMPLEMENT_ABSTRACT_CLASS</a>(className, baseClassName)</td></tr>
<tr class="memdesc:ga2f58f4ea4376a2e3994a9e6880509027"><td class="mdescLeft"> </td><td class="mdescRight">Used in a C++ implementation file to complete the declaration of a class that has run-time type information. <a href="#ga2f58f4ea4376a2e3994a9e6880509027"></a><br/></td></tr>
<tr class="separator:ga2f58f4ea4376a2e3994a9e6880509027"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga55f899b6146d26aa5a75a22984fa1895"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga55f899b6146d26aa5a75a22984fa1895">wxIMPLEMENT_ABSTRACT_CLASS2</a>(className, baseClassName1, baseClassName2)</td></tr>
<tr class="memdesc:ga55f899b6146d26aa5a75a22984fa1895"><td class="mdescLeft"> </td><td class="mdescRight">Used in a C++ implementation file to complete the declaration of a class that has run-time type information and two base classes. <a href="#ga55f899b6146d26aa5a75a22984fa1895"></a><br/></td></tr>
<tr class="separator:ga55f899b6146d26aa5a75a22984fa1895"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga4cbf0c21eb5986eb489dc67450eab1d1"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga4cbf0c21eb5986eb489dc67450eab1d1">wxIMPLEMENT_DYNAMIC_CLASS</a>(className, baseClassName)</td></tr>
<tr class="memdesc:ga4cbf0c21eb5986eb489dc67450eab1d1"><td class="mdescLeft"> </td><td class="mdescRight">Used in a C++ implementation file to complete the declaration of a class that has run-time type information, and whose instances can be created dynamically. <a href="#ga4cbf0c21eb5986eb489dc67450eab1d1"></a><br/></td></tr>
<tr class="separator:ga4cbf0c21eb5986eb489dc67450eab1d1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga239f80b143bae2085a271fea0b5ed9db"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga239f80b143bae2085a271fea0b5ed9db">wxIMPLEMENT_DYNAMIC_CLASS2</a>(className, baseClassName1, baseClassName2)</td></tr>
<tr class="memdesc:ga239f80b143bae2085a271fea0b5ed9db"><td class="mdescLeft"> </td><td class="mdescRight">Used in a C++ implementation file to complete the declaration of a class that has run-time type information, and whose instances can be created dynamically. <a href="#ga239f80b143bae2085a271fea0b5ed9db"></a><br/></td></tr>
<tr class="separator:ga239f80b143bae2085a271fea0b5ed9db"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaf2d0caedeccc20619218809d4a2a7604"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#gaf2d0caedeccc20619218809d4a2a7604">wxIMPLEMENT_CLASS</a>(className, baseClassName)</td></tr>
<tr class="memdesc:gaf2d0caedeccc20619218809d4a2a7604"><td class="mdescLeft"> </td><td class="mdescRight">Used in a C++ implementation file to complete the declaration of a class that has run-time type information, and whose instances can be created dynamically. <a href="#gaf2d0caedeccc20619218809d4a2a7604"></a><br/></td></tr>
<tr class="separator:gaf2d0caedeccc20619218809d4a2a7604"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaf644ef7f6fe628bc447141936f675332"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#gaf644ef7f6fe628bc447141936f675332">wxIMPLEMENT_CLASS2</a>(className, baseClassName1, baseClassName2)</td></tr>
<tr class="memdesc:gaf644ef7f6fe628bc447141936f675332"><td class="mdescLeft"> </td><td class="mdescRight">Used in a C++ implementation file to complete the declaration of a class that has run-time type information and two base classes, and whose instances can be created dynamically. <a href="#gaf644ef7f6fe628bc447141936f675332"></a><br/></td></tr>
<tr class="separator:gaf644ef7f6fe628bc447141936f675332"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gae268e701d1e2aed8539c6003f775dd73"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#gae268e701d1e2aed8539c6003f775dd73">wx_const_cast</a>(T, x)</td></tr>
<tr class="memdesc:gae268e701d1e2aed8539c6003f775dd73"><td class="mdescLeft"> </td><td class="mdescRight">Same as <code>const_cast<T>(x)</code> if the compiler supports const cast or <code></code>(T)x for old compilers. <a href="#gae268e701d1e2aed8539c6003f775dd73"></a><br/></td></tr>
<tr class="separator:gae268e701d1e2aed8539c6003f775dd73"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga42cdce9f5bc6dbe6a846a47e9e841e4f"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga42cdce9f5bc6dbe6a846a47e9e841e4f">wx_reinterpret_cast</a>(T, x)</td></tr>
<tr class="memdesc:ga42cdce9f5bc6dbe6a846a47e9e841e4f"><td class="mdescLeft"> </td><td class="mdescRight">Same as <code>reinterpret_cast<T>(x)</code> if the compiler supports reinterpret cast or <code></code>(T)x for old compilers. <a href="#ga42cdce9f5bc6dbe6a846a47e9e841e4f"></a><br/></td></tr>
<tr class="separator:ga42cdce9f5bc6dbe6a846a47e9e841e4f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa3a4a52303d4a1fa3d3346e762638c64"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#gaa3a4a52303d4a1fa3d3346e762638c64">wx_static_cast</a>(T, x)</td></tr>
<tr class="memdesc:gaa3a4a52303d4a1fa3d3346e762638c64"><td class="mdescLeft"> </td><td class="mdescRight">Same as <code>static_cast<T>(x)</code> if the compiler supports static cast or <code></code>(T)x for old compilers. <a href="#gaa3a4a52303d4a1fa3d3346e762638c64"></a><br/></td></tr>
<tr class="separator:gaa3a4a52303d4a1fa3d3346e762638c64"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga092df8a3ee35e20a4c2c7d0b6132592a"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga092df8a3ee35e20a4c2c7d0b6132592a">wx_truncate_cast</a>(T, x)</td></tr>
<tr class="memdesc:ga092df8a3ee35e20a4c2c7d0b6132592a"><td class="mdescLeft"> </td><td class="mdescRight">This case doesn’t correspond to any standard cast but exists solely to make casts which possibly result in a truncation of an integer value more readable. <a href="#ga092df8a3ee35e20a4c2c7d0b6132592a"></a><br/></td></tr>
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<tr class="memitem:ga47026a9dcf1318d6934c1e8091f3433e"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga47026a9dcf1318d6934c1e8091f3433e">wxConstCast</a>(ptr, classname)</td></tr>
<tr class="memdesc:ga47026a9dcf1318d6934c1e8091f3433e"><td class="mdescLeft"> </td><td class="mdescRight">This macro expands into <code>const_cast<classname *>(ptr)</code> if the compiler supports const_cast or into an old, C-style cast, otherwise. <a href="#ga47026a9dcf1318d6934c1e8091f3433e"></a><br/></td></tr>
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<tr class="memitem:ga2606f92f8d5f8e22f4afb44a6df3c38a"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a">wxDynamicCast</a>(ptr, classname)</td></tr>
<tr class="memdesc:ga2606f92f8d5f8e22f4afb44a6df3c38a"><td class="mdescLeft"> </td><td class="mdescRight">This macro returns the pointer <em>ptr</em> cast to the type <em>classname</em> * if the pointer is of this type (the check is done during the run-time) or <span class="literal">NULL</span> otherwise. <a href="#ga2606f92f8d5f8e22f4afb44a6df3c38a"></a><br/></td></tr>
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<tr class="memitem:ga2f76c7ed5cfc61d7f5e62a1618476af5"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga2f76c7ed5cfc61d7f5e62a1618476af5">wxDynamicCastThis</a>(classname)</td></tr>
<tr class="memdesc:ga2f76c7ed5cfc61d7f5e62a1618476af5"><td class="mdescLeft"> </td><td class="mdescRight">This macro is equivalent to <code><a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast(this, classname)</a></code> but the latter provokes spurious compilation warnings from some compilers (because it tests whether <code>this</code> pointer is non-<span class="literal">NULL</span> which is always true), so this macro should be used to avoid them. <a href="#ga2f76c7ed5cfc61d7f5e62a1618476af5"></a><br/></td></tr>
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<tr class="memitem:gaae25db7169be29d37f3451dff0ac7711"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#gaae25db7169be29d37f3451dff0ac7711">wxStaticCast</a>(ptr, classname)</td></tr>
<tr class="memdesc:gaae25db7169be29d37f3451dff0ac7711"><td class="mdescLeft"> </td><td class="mdescRight">This macro checks that the cast is valid in debug mode (an assert failure will result if <a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast(ptr, classname)</a> == <span class="literal">NULL</span>) and then returns the result of executing an equivalent of <code>static_cast<classname *>(ptr)</code>. <a href="#gaae25db7169be29d37f3451dff0ac7711"></a><br/></td></tr>
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<tr class="memitem:ga0c6d4b0411eda94d041198d6385980cb"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#ga0c6d4b0411eda94d041198d6385980cb">wxGetVariantCast</a>(var, classname)</td></tr>
<tr class="memdesc:ga0c6d4b0411eda94d041198d6385980cb"><td class="mdescLeft"> </td><td class="mdescRight">This macro returns a pointer to the data stored in <em>var</em> (<a class="el" href="classwx_variant.html" title="The wxVariant class represents a container for any type.">wxVariant</a>) cast to the type <em>classname</em> if the data is of this type (the check is done during the run-time) or <span class="literal">NULL</span> otherwise. <a href="#ga0c6d4b0411eda94d041198d6385980cb"></a><br/></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gad73c0b653058d5bd95fce98e624ffb2d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classwx_object.html">wxObject</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__funcmacro__rtti.html#gad73c0b653058d5bd95fce98e624ffb2d">wxCreateDynamicObject</a> (const <a class="el" href="classwx_string.html">wxString</a> &className)</td></tr>
<tr class="memdesc:gad73c0b653058d5bd95fce98e624ffb2d"><td class="mdescLeft"> </td><td class="mdescRight">Creates and returns an object of the given class, if the class has been registered with the dynamic class system using DECLARE... <a href="#gad73c0b653058d5bd95fce98e624ffb2d"></a><br/></td></tr>
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<h2 class="groupheader">Macro Definition Documentation</h2>
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<p>Same as <code>const_cast<T>(x)</code> if the compiler supports const cast or <code></code>(T)x for old compilers. </p>
<p>Unlike <a class="el" href="group__group__funcmacro__rtti.html#ga47026a9dcf1318d6934c1e8091f3433e" title="This macro expands into const_cast<classname *>(ptr) if the compiler supports const_cast or into an o...">wxConstCast()</a>, the cast it to the type <code>T</code> and not to <code>T *</code> and also the order of arguments is the same as for the standard cast.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/defs.h> </pre><dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__group__funcmacro__rtti.html#ga42cdce9f5bc6dbe6a846a47e9e841e4f" title="Same as reinterpret_cast<T>(x) if the compiler supports reinterpret cast or (T)x for old compilers...">wx_reinterpret_cast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#gaa3a4a52303d4a1fa3d3346e762638c64" title="Same as static_cast<T>(x) if the compiler supports static cast or (T)x for old compilers.">wx_static_cast()</a> </dd></dl>
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<td class="memname">#define wx_reinterpret_cast</td>
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<p>Same as <code>reinterpret_cast<T>(x)</code> if the compiler supports reinterpret cast or <code></code>(T)x for old compilers. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/defs.h> </pre><dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__group__funcmacro__rtti.html#gae268e701d1e2aed8539c6003f775dd73" title="Same as const_cast<T>(x) if the compiler supports const cast or (T)x for old compilers.">wx_const_cast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#gaa3a4a52303d4a1fa3d3346e762638c64" title="Same as static_cast<T>(x) if the compiler supports static cast or (T)x for old compilers.">wx_static_cast()</a> </dd></dl>
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<p>Same as <code>static_cast<T>(x)</code> if the compiler supports static cast or <code></code>(T)x for old compilers. </p>
<p>Unlike <a class="el" href="group__group__funcmacro__rtti.html#gaae25db7169be29d37f3451dff0ac7711" title="This macro checks that the cast is valid in debug mode (an assert failure will result if wxDynamicCas...">wxStaticCast()</a>, there are no checks being done and the meaning of the macro arguments is exactly the same as for the standard static cast, i.e. <em>T</em> is the full type name and star is not appended to it.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/defs.h> </pre><dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__group__funcmacro__rtti.html#gae268e701d1e2aed8539c6003f775dd73" title="Same as const_cast<T>(x) if the compiler supports const cast or (T)x for old compilers.">wx_const_cast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga42cdce9f5bc6dbe6a846a47e9e841e4f" title="Same as reinterpret_cast<T>(x) if the compiler supports reinterpret cast or (T)x for old compilers...">wx_reinterpret_cast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga092df8a3ee35e20a4c2c7d0b6132592a" title="This case doesn’t correspond to any standard cast but exists solely to make casts which possibly resu...">wx_truncate_cast()</a> </dd></dl>
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<p>This case doesn’t correspond to any standard cast but exists solely to make casts which possibly result in a truncation of an integer value more readable. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/defs.h> </pre>
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<p>Returns a pointer to the <a class="el" href="classwx_class_info.html" title="This class stores meta-information about classes.">wxClassInfo</a> object associated with this class. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre>
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<p>This macro expands into <code>const_cast<classname *>(ptr)</code> if the compiler supports const_cast or into an old, C-style cast, otherwise. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/defs.h> </pre><dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__group__funcmacro__rtti.html#gae268e701d1e2aed8539c6003f775dd73" title="Same as const_cast<T>(x) if the compiler supports const cast or (T)x for old compilers.">wx_const_cast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#gaae25db7169be29d37f3451dff0ac7711" title="This macro checks that the cast is valid in debug mode (an assert failure will result if wxDynamicCas...">wxStaticCast()</a> </dd></dl>
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<p>Used inside a class declaration to declare that the class should be made known to the class hierarchy, but objects of this class cannot be created dynamically. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre><p>Example:</p>
<div class="fragment"><div class="line"><span class="keyword">class </span><a class="code" href="classwx_command.html" title="wxCommand is a base class for modelling an application command, which is an action usually performed ...">wxCommand</a>: <span class="keyword">public</span> <a class="code" href="classwx_object.html" title="This is the root class of many of the wxWidgets classes.">wxObject</a></div>
<div class="line">{</div>
<div class="line"> <a class="code" href="group__group__funcmacro__rtti.html#ga5bbb5821d56ac801da838c42105b72ae" title="Used inside a class declaration to declare that the class should be made known to the class hierarchy...">wxDECLARE_ABSTRACT_CLASS</a>(<a class="code" href="classwx_command.html" title="wxCommand is a base class for modelling an application command, which is an action usually performed ...">wxCommand</a>);</div>
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<div class="line"><span class="keyword">private</span>:</div>
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<p>This is used in headers to create a forward declaration of the <a class="el" href="group__group__funcmacro__appinitterm.html#gac387a69e740a149f9888e4992a3a4c6c" title="This function doesn't exist in wxWidgets but it is created by using the wxIMPLEMENT_APP() macro...">wxGetApp()</a> function implemented by <a class="el" href="group__group__funcmacro__rtti.html#ga967aafaa261481fe2d2e1cf599e3e003" title="This is used in the application class implementation file to make the application class known to wxWi...">wxIMPLEMENT_APP()</a>. </p>
<p>It creates the declaration <code>className& <a class="el" href="group__group__funcmacro__appinitterm.html#gac387a69e740a149f9888e4992a3a4c6c" title="This function doesn't exist in wxWidgets but it is created by using the wxIMPLEMENT_APP() macro...">wxGetApp()</a></code> (requires a final semicolon).</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/app.h> </pre><p>Example:</p>
<div class="fragment"><div class="line"><a class="code" href="group__group__funcmacro__rtti.html#ga1523a2d553dea288d66cd35e8a0ffd5c" title="This is used in headers to create a forward declaration of the wxGetApp() function implemented by wxI...">wxDECLARE_APP</a>(MyApp);</div>
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<p>Used inside a class declaration to declare that the class should be made known to the class hierarchy, but objects of this class cannot be created dynamically. </p>
<p>The same as <a class="el" href="group__group__funcmacro__rtti.html#ga5bbb5821d56ac801da838c42105b72ae" title="Used inside a class declaration to declare that the class should be made known to the class hierarchy...">wxDECLARE_ABSTRACT_CLASS()</a>.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre>
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<p>Used inside a class declaration to make the class known to wxWidgets RTTI system and also declare that the objects of this class should be dynamically creatable from run-time type information. </p>
<p>Notice that this implies that the class should have a default constructor, if this is not the case consider using <a class="el" href="group__group__funcmacro__rtti.html#ga5bbb5821d56ac801da838c42105b72ae" title="Used inside a class declaration to declare that the class should be made known to the class hierarchy...">wxDECLARE_ABSTRACT_CLASS()</a>.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre><p>Example:</p>
<div class="fragment"><div class="line"><span class="keyword">class </span><a class="code" href="classwx_frame.html" title="A frame is a window whose size and position can (usually) be changed by the user.">wxFrame</a>: <span class="keyword">public</span> <a class="code" href="classwx_window.html" title="wxWindow is the base class for all windows and represents any visible object on screen.">wxWindow</a></div>
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<p>This macro returns the pointer <em>ptr</em> cast to the type <em>classname</em> * if the pointer is of this type (the check is done during the run-time) or <span class="literal">NULL</span> otherwise. </p>
<p>Usage of this macro is preferred over obsoleted <a class="el" href="classwx_object.html#af40d580385cf4f8112fae7713404b01e" title="Determines whether this class is a subclass of (or the same class as) the given class.">wxObject::IsKindOf()</a> function.</p>
<p>The <em>ptr</em> argument may be <span class="literal">NULL</span>, in which case <span class="literal">NULL</span> will be returned.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre><p>Example:</p>
<div class="fragment"><div class="line"><a class="code" href="classwx_window.html" title="wxWindow is the base class for all windows and represents any visible object on screen.">wxWindow</a> *win = <a class="code" href="classwx_window.html#a777258379a3eef1b0530f12db6b77cab" title="Finds the window or control which currently has the keyboard focus.">wxWindow::FindFocus</a>();</div>
<div class="line"><a class="code" href="classwx_text_ctrl.html" title="A text control allows text to be displayed and edited.">wxTextCtrl</a> *text = <a class="code" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast</a>(win, <a class="code" href="classwx_text_ctrl.html" title="A text control allows text to be displayed and edited.">wxTextCtrl</a>);</div>
<div class="line"><span class="keywordflow">if</span> ( text )</div>
<div class="line">{</div>
<div class="line"> <span class="comment">// a text control has the focus...</span></div>
<div class="line">}</div>
<div class="line"><span class="keywordflow">else</span></div>
<div class="line">{</div>
<div class="line"> <span class="comment">// no window has the focus or it is not a text control</span></div>
<div class="line">}</div>
</div><!-- fragment --><dl class="section see"><dt>See Also</dt><dd><a class="el" href="overview_rtti.html">Runtime Type Information (RTTI)</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga2f76c7ed5cfc61d7f5e62a1618476af5" title="This macro is equivalent to wxDynamicCast(this, classname) but the latter provokes spurious compilati...">wxDynamicCastThis()</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga47026a9dcf1318d6934c1e8091f3433e" title="This macro expands into const_cast<classname *>(ptr) if the compiler supports const_cast or into an o...">wxConstCast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#gaae25db7169be29d37f3451dff0ac7711" title="This macro checks that the cast is valid in debug mode (an assert failure will result if wxDynamicCas...">wxStaticCast()</a> </dd></dl>
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<td class="memname">#define wxDynamicCastThis</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">classname</td><td>)</td>
<td></td>
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<p>This macro is equivalent to <code><a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast(this, classname)</a></code> but the latter provokes spurious compilation warnings from some compilers (because it tests whether <code>this</code> pointer is non-<span class="literal">NULL</span> which is always true), so this macro should be used to avoid them. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre><dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast()</a> </dd></dl>
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<td class="memname">#define wxGetVariantCast</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">var, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">classname </td>
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<td>)</td>
<td></td><td></td>
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<p>This macro returns a pointer to the data stored in <em>var</em> (<a class="el" href="classwx_variant.html" title="The wxVariant class represents a container for any type.">wxVariant</a>) cast to the type <em>classname</em> if the data is of this type (the check is done during the run-time) or <span class="literal">NULL</span> otherwise. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/variant.h> </pre><dl class="section see"><dt>See Also</dt><dd><a class="el" href="overview_rtti.html">Runtime Type Information (RTTI)</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast()</a> </dd></dl>
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<td class="memname">#define wxIMPLEMENT_ABSTRACT_CLASS</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">className, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Used in a C++ implementation file to complete the declaration of a class that has run-time type information. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre><p>Example:</p>
<div class="fragment"><div class="line"><a class="code" href="group__group__funcmacro__rtti.html#ga2f58f4ea4376a2e3994a9e6880509027" title="Used in a C++ implementation file to complete the declaration of a class that has run-time type infor...">wxIMPLEMENT_ABSTRACT_CLASS</a>(<a class="code" href="classwx_command.html" title="wxCommand is a base class for modelling an application command, which is an action usually performed ...">wxCommand</a>, <a class="code" href="classwx_object.html" title="This is the root class of many of the wxWidgets classes.">wxObject</a>);</div>
<div class="line"></div>
<div class="line"><a class="code" href="classwx_command.html#a544c13f28592ffd6a9e8b86be07e98d6" title="Constructor.">wxCommand::wxCommand</a>(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line"> ...</div>
<div class="line">}</div>
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<td class="memname">#define wxIMPLEMENT_ABSTRACT_CLASS2</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">className, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName1, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName2 </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Used in a C++ implementation file to complete the declaration of a class that has run-time type information and two base classes. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre>
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<td class="memname">#define wxIMPLEMENT_APP</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">className</td><td>)</td>
<td></td>
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<p>This is used in the application class implementation file to make the application class known to wxWidgets for dynamic construction. </p>
<p>Note that this macro requires a final semicolon.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/app.h> </pre><p>Example:</p>
<div class="fragment"><div class="line"><a class="code" href="group__group__funcmacro__rtti.html#ga967aafaa261481fe2d2e1cf599e3e003" title="This is used in the application class implementation file to make the application class known to wxWi...">wxIMPLEMENT_APP</a>(MyApp);</div>
</div><!-- fragment --><dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__group__funcmacro__rtti.html#ga1523a2d553dea288d66cd35e8a0ffd5c" title="This is used in headers to create a forward declaration of the wxGetApp() function implemented by wxI...">wxDECLARE_APP()</a> </dd></dl>
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<td class="memname">#define wxIMPLEMENT_CLASS</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">className, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Used in a C++ implementation file to complete the declaration of a class that has run-time type information, and whose instances can be created dynamically. </p>
<p>The same as <a class="el" href="group__group__funcmacro__rtti.html#ga4cbf0c21eb5986eb489dc67450eab1d1" title="Used in a C++ implementation file to complete the declaration of a class that has run-time type infor...">wxIMPLEMENT_DYNAMIC_CLASS()</a>.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre>
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<td class="memname">#define wxIMPLEMENT_CLASS2</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">className, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName1, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName2 </td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p>Used in a C++ implementation file to complete the declaration of a class that has run-time type information and two base classes, and whose instances can be created dynamically. </p>
<p>The same as <a class="el" href="group__group__funcmacro__rtti.html#ga239f80b143bae2085a271fea0b5ed9db" title="Used in a C++ implementation file to complete the declaration of a class that has run-time type infor...">wxIMPLEMENT_DYNAMIC_CLASS2()</a>.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre>
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<td class="memname">#define wxIMPLEMENT_DYNAMIC_CLASS</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">className, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<p>Used in a C++ implementation file to complete the declaration of a class that has run-time type information, and whose instances can be created dynamically. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre><p>Example:</p>
<div class="fragment"><div class="line"><a class="code" href="group__group__funcmacro__rtti.html#ga4cbf0c21eb5986eb489dc67450eab1d1" title="Used in a C++ implementation file to complete the declaration of a class that has run-time type infor...">wxIMPLEMENT_DYNAMIC_CLASS</a>(<a class="code" href="classwx_frame.html" title="A frame is a window whose size and position can (usually) be changed by the user.">wxFrame</a>, <a class="code" href="classwx_window.html" title="wxWindow is the base class for all windows and represents any visible object on screen.">wxWindow</a>);</div>
<div class="line"></div>
<div class="line"><a class="code" href="classwx_frame.html#af80368ba23c71c5d947c3178b8fe10fc" title="Default constructor.">wxFrame::wxFrame</a>(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line"> ...</div>
<div class="line">}</div>
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<td class="memname">#define wxIMPLEMENT_DYNAMIC_CLASS2</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">className, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName1, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">baseClassName2 </td>
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<td>)</td>
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<p>Used in a C++ implementation file to complete the declaration of a class that has run-time type information, and whose instances can be created dynamically. </p>
<p>Use this for classes derived from two base classes.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre>
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<td class="memname">#define wxStaticCast</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">ptr, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">classname </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>This macro checks that the cast is valid in debug mode (an assert failure will result if <a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast(ptr, classname)</a> == <span class="literal">NULL</span>) and then returns the result of executing an equivalent of <code>static_cast<classname *>(ptr)</code>. </p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre><dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__group__funcmacro__rtti.html#gaa3a4a52303d4a1fa3d3346e762638c64" title="Same as static_cast<T>(x) if the compiler supports static cast or (T)x for old compilers.">wx_static_cast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga2606f92f8d5f8e22f4afb44a6df3c38a" title="This macro returns the pointer ptr cast to the type classname * if the pointer is of this type (the c...">wxDynamicCast()</a>, <a class="el" href="group__group__funcmacro__rtti.html#ga47026a9dcf1318d6934c1e8091f3433e" title="This macro expands into const_cast<classname *>(ptr) if the compiler supports const_cast or into an o...">wxConstCast()</a> </dd></dl>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname"><a class="el" href="classwx_object.html">wxObject</a>* wxCreateDynamicObject </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classwx_string.html">wxString</a> & </td>
<td class="paramname"><em>className</em></td><td>)</td>
<td></td>
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<p>Creates and returns an object of the given class, if the class has been registered with the dynamic class system using DECLARE... </p>
<p>and IMPLEMENT... macros.</p>
<p>Include file: </p>
<pre class="fragment">#include <wx/object.h> </pre>
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