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<h1>dox/Common/vtkWeakPointerBase.h</h1><a href="a02169.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*=========================================================================</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> Program: Visualization Toolkit</span>
<a name="l00004"></a>00004 <span class="comment"> Module: $RCSfile: vtkWeakPointerBase.h,v $</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen</span>
<a name="l00007"></a>00007 <span class="comment"> All rights reserved.</span>
<a name="l00008"></a>00008 <span class="comment"> See Copyright.txt or http://www.kitware.com/Copyright.htm for details.</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"> This software is distributed WITHOUT ANY WARRANTY; without even</span>
<a name="l00011"></a>00011 <span class="comment"> the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR</span>
<a name="l00012"></a>00012 <span class="comment"> PURPOSE. See the above copyright notice for more information.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment">=========================================================================*/</span>
<a name="l00024"></a>00024 <span class="preprocessor">#ifndef __vtkWeakPointerBase_h</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">#define __vtkWeakPointerBase_h</span>
<a name="l00026"></a>00026 <span class="preprocessor"></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="a02079.html">vtkObject.h</a>"</span>
<a name="l00028"></a>00028
<a name="l00029"></a><a class="code" href="a01870.html">00029</a> <span class="keyword">class </span><a class="code" href="a02170.html#873ca0b83d0838a1df577536068a1730">VTK_COMMON_EXPORT</a> <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>
<a name="l00030"></a>00030 {
<a name="l00031"></a>00031 <span class="keyword">public</span>:
<a name="l00033"></a>00033 <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>();
<a name="l00034"></a>00034
<a name="l00036"></a>00036 <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>(<a class="code" href="a01084.html" title="abstract base class for most VTK objects">vtkObject</a>* r);
<a name="l00037"></a>00037
<a name="l00039"></a>00039 <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>(<span class="keyword">const</span> <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>& r);
<a name="l00040"></a>00040
<a name="l00042"></a>00042 ~<a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>();
<a name="l00043"></a>00043
<a name="l00045"></a>00045
<a name="l00047"></a>00047 <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>& operator=(<a class="code" href="a01084.html" title="abstract base class for most VTK objects">vtkObject</a>* r);
<a name="l00048"></a>00048 <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>& operator=(<span class="keyword">const</span> <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>& r);
<a name="l00050"></a>00050
<a name="l00052"></a>00052
<a name="l00053"></a><a class="code" href="a01870.html#4866dc3c524021d05b1a95f14d5113aa">00053</a> <a class="code" href="a01084.html" title="abstract base class for most VTK objects">vtkObject</a>* GetPointer()<span class="keyword"> const</span>
<a name="l00054"></a>00054 <span class="keyword"> </span>{
<a name="l00055"></a>00055 <span class="comment">// Inline implementation so smart pointer comparisons can be fully</span>
<a name="l00056"></a>00056 <span class="comment">// inlined.</span>
<a name="l00057"></a>00057 <span class="keywordflow">return</span> this->Object;
<a name="l00058"></a>00058 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keyword">protected</span>:
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="comment">// Initialize smart pointer to given object, but do not increment</span>
<a name="l00064"></a>00064 <span class="comment">// reference count. The destructor will still decrement the count.</span>
<a name="l00065"></a>00065 <span class="comment">// This effectively makes it an auto-ptr.</span>
<a name="l00066"></a><a class="code" href="a01871.html">00066</a> <span class="keyword">class </span><a class="code" href="a01871.html">NoReference</a> {};
<a name="l00067"></a>00067 <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>(<a class="code" href="a01084.html" title="abstract base class for most VTK objects">vtkObject</a>* r, <span class="keyword">const</span> <a class="code" href="a01871.html">NoReference</a>&);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// Pointer to the actual object.</span>
<a name="l00070"></a><a class="code" href="a01870.html#1e6a5d13318f1f914720aa344ef88604">00070</a> <a class="code" href="a01084.html" title="abstract base class for most VTK objects">vtkObject</a>* Object;
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="keyword">private</span>:
<a name="l00073"></a>00073 <span class="comment">// Internal utility methods.</span>
<a name="l00074"></a>00074 <span class="keywordtype">void</span> RemoveObserver();
<a name="l00075"></a>00075 <span class="keywordtype">void</span> AddObserver();
<a name="l00076"></a>00076
<a name="l00077"></a><a class="code" href="a01870.html#dcba968db5bdc215b04e1a4fc51da0ef">00077</a> <span class="keyword">class </span>vtkObserver;
<a name="l00078"></a>00078 <span class="keyword">friend</span> <span class="keyword">class </span>vtkObserver;
<a name="l00079"></a>00079 vtkObserver* Observer;
<a name="l00080"></a>00080 };
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00083"></a>00083 <span class="comment">// Need to use vtkstd_bool type because std: :less requires bool return</span>
<a name="l00084"></a>00084 <span class="comment">// type from operators. This example should not be used to justify</span>
<a name="l00085"></a>00085 <span class="comment">// using bool elsewhere in VTK.</span>
<a name="l00086"></a>00086
<a name="l00087"></a><a class="code" href="a02169.html#e9d6b847d633956da4517fd554a52e1a">00087</a> <span class="preprocessor">#define VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR(op) \</span>
<a name="l00088"></a>00088 <span class="preprocessor"> inline vtkstd_bool \</span>
<a name="l00089"></a>00089 <span class="preprocessor"> operator op (const vtkWeakPointerBase& l, const vtkWeakPointerBase& r) \</span>
<a name="l00090"></a>00090 <span class="preprocessor"> { \</span>
<a name="l00091"></a>00091 <span class="preprocessor"> return (static_cast<void*>(l.GetPointer()) op \</span>
<a name="l00092"></a>00092 <span class="preprocessor"> static_cast<void*>(r.GetPointer())); \</span>
<a name="l00093"></a>00093 <span class="preprocessor"> } \</span>
<a name="l00094"></a>00094 <span class="preprocessor"> inline vtkstd_bool \</span>
<a name="l00095"></a>00095 <span class="preprocessor"> operator op (vtkObject* l, const vtkWeakPointerBase& r) \</span>
<a name="l00096"></a>00096 <span class="preprocessor"> { \</span>
<a name="l00097"></a>00097 <span class="preprocessor"> return (static_cast<void*>(l) op static_cast<void*>(r.GetPointer())); \</span>
<a name="l00098"></a>00098 <span class="preprocessor"> } \</span>
<a name="l00099"></a>00099 <span class="preprocessor"> inline vtkstd_bool \</span>
<a name="l00100"></a>00100 <span class="preprocessor"> operator op (const vtkWeakPointerBase& l, vtkObject* r) \</span>
<a name="l00101"></a>00101 <span class="preprocessor"> { \</span>
<a name="l00102"></a>00102 <span class="preprocessor"> return (static_cast<void*>(l.GetPointer()) op static_cast<void*>(r)); \</span>
<a name="l00103"></a>00103 <span class="preprocessor"> }</span>
<a name="l00104"></a>00104 <span class="preprocessor"></span>
<a name="l00105"></a>00105 <a class="code" href="a02169.html#e9d6b847d633956da4517fd554a52e1a">VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR</a>(==)
<a name="l00106"></a>00106 <a class="code" href="a02169.html#e9d6b847d633956da4517fd554a52e1a">VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR</a>(!=)
<a name="l00107"></a>00107 <a class="code" href="a02169.html#e9d6b847d633956da4517fd554a52e1a">VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR</a>(<)
<a name="l00108"></a>00108 <a class="code" href="a02169.html#e9d6b847d633956da4517fd554a52e1a">VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR</a>(<=)
<a name="l00109"></a>00109 <a class="code" href="a02169.html#e9d6b847d633956da4517fd554a52e1a">VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR</a>(>)
<a name="l00110"></a>00110 <a class="code" href="a02169.html#e9d6b847d633956da4517fd554a52e1a">VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR</a>(>=)
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="preprocessor">#undef VTK_WEAK_POINTER_BASE_DEFINE_OPERATOR</span>
<a name="l00113"></a>00113 <span class="preprocessor"></span>
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <a class="code" href="a02170.html#873ca0b83d0838a1df577536068a1730">VTK_COMMON_EXPORT</a> ostream& <a class="code" href="a02038.html#95573118ef33adb9530ec84d741db7db">operator << </a>(ostream& os,
<a name="l00117"></a>00117 <span class="keyword">const</span> <a class="code" href="a01870.html" title="Non-templated superclass for vtkWeakPointer.">vtkWeakPointerBase</a>& p);
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="preprocessor">#endif</span>
</pre></div></div>
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