Difference between revisions of "QtConcurrent-BlockingMapped-Other-Object-Member-Function-Bind"

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Demonstrates how to pass each object in the container to a member function of different class instance using boost::bind. You can alternatively do this by overloading "operator()":http://developer.qt.nokia.com/wiki/QtConcurrent-BlockingMapped-Other-Object-Member-Function-Operator
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[[Category:HowTo]]
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This demonstrates how to pass each object in the container to a member function of different class instance using boost::bind. You can alternatively do this by overloading [[QtConcurrent-BlockingMapped-Other-Object-Member-Function-Operator | operator()]]
  
<code><br />#include &lt;QtConcurrentMap&amp;gt;<br />#include &lt;QVector&amp;gt;
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<code>
 
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#include <QtConcurrentMap>
#include &lt;boost/bind.hpp&amp;gt;
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#include <QVector>
 
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#include <boost/bind.hpp>
#include &lt;iostream&amp;gt;
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#include <iostream>
  
 
class Object{};
 
class Object{};
  
class MyClass<br />{<br />public:<br /> float Test(const Object&amp;amp; object) const { return 1.0f;} // Note, this function MUST be const!<br />};
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class MyClass
 
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{
int main()<br />{<br /> QVector&amp;amp;lt;Object&amp;amp;gt; v;<br /> Object a;<br /> v.push_back(a);
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public:
 
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float Test(const Object& object) const { return 1.0f; } // Note, this function MUST be const!
MyClass myClass;
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};
 
 
QVector&amp;lt;float&amp;gt; result = QtConcurrent::blockingMapped&amp;lt;QVector&amp;lt;float&amp;gt; &gt;(v.begin(), v.end(), boost::bind(&amp;MyClass::Test, &amp;myClass, _1));
 
  
std::cout &lt;&lt; result[0] &lt;&lt; std::endl;<br /> return 0;<br />}
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int main()
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{
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QVector<Object> v;
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Object a;
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v.push_back(a);
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MyClass myClass;
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QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), boost::bind(&MyClass::Test, &myClass, _1));
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std::cout << result[0] << std::endl;
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return 0;
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}
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</code>

Latest revision as of 02:14, 18 May 2017

This demonstrates how to pass each object in the container to a member function of different class instance using boost::bind. You can alternatively do this by overloading operator()

  1. include <QtConcurrentMap>
  2. include <QVector>
  3. include <boost/bind.hpp>
  4. include <iostream>

class Object{};

class MyClass { public:

float Test(const Object& object) const { return 1.0f; } // Note, this function MUST be const!

};

int main() {

QVector<Object> v;
Object a;
v.push_back(a);
MyClass myClass;
QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), boost::bind(&MyClass::Test, &myClass, _1));
std::cout << result[0] << std::endl;
return 0;

}