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<div class="textblock"><p>Section: <a class="el" href="sec_vtkcommon.html">Visualization Toolkit Common Classes</a> </p>
<h1><a class="anchor" id="Usage"></a>
Usage</h1>
<p>vtkArrayIterator is used to iterate over elements in any vtkAbstractArray subclass. The vtkArrayIteratorTemplateMacro is used to centralize the set of types supported by Execute methods. It also avoids duplication of long switch statement case lists. Note that in this macro VTK_TT is defined to be the type of the iterator for the given type of array. One must include the vtkArrayIteratorIncludes.h header file to provide for extending of this macro by addition of new iterators.</p>
<p>Example usage: </p>
<pre class="fragment"> vtkArrayIter* iter = array->NewIterator();
switch(array->GetDataType())
{
vtkArrayIteratorTemplateMacro(myFunc(static_cast<VTK_TT*>(iter), arg2));
}
iter->Delete();
</pre><p>To create an instance of class vtkArrayIterator, simply invoke its constructor as follows </p>
<pre class="fragment"> obj = vtkArrayIterator
</pre> <h1><a class="anchor" id="Methods"></a>
Methods</h1>
<p>The class vtkArrayIterator has several methods that can be used. They are listed below. Note that the documentation is translated automatically from the VTK sources, and may not be completely intelligible. When in doubt, consult the VTK website. In the methods listed below, <code>obj</code> is an instance of the vtkArrayIterator class. </p>
<ul>
<li>
<code>string = obj.GetClassName ()</code> </li>
<li>
<code>int = obj.IsA (string name)</code> </li>
<li>
<code>vtkArrayIterator = obj.NewInstance ()</code> </li>
<li>
<code>vtkArrayIterator = obj.SafeDownCast (vtkObject o)</code> </li>
<li>
<code>obj.Initialize (vtkAbstractArray array)</code> - Set the array this iterator will iterate over. After Initialize() has been called, the iterator is valid so long as the Array has not been modified (except using the iterator itself). If the array is modified, the iterator must be re-intialized. </li>
<li>
<code>int = obj.GetDataType ()</code> </li>
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