QtConcurrent-BlockingMapped-Other-Object-Member-Function-Bind: Difference between revisions

From Qt Wiki
Jump to navigation Jump to search
(Convert ExpressionEngine links)
(Decode HTML entity names)
Line 16: Line 16:
{
{
public:
public:
  float Test(const Object& object) const { return 1.0f;} // Note, this function MUST be const!
  float Test(const Object& object) const { return 1.0f;} // Note, this function MUST be const!
};
};


int main()
int main()
{
{
  QVector<Object> v;
  QVector<Object> v;
  Object a;
  Object a;
  v.push_back(a);
  v.push_back(a);
Line 27: Line 27:
MyClass myClass;
MyClass myClass;


QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), boost::bind(&amp;MyClass::Test, &amp;myClass, _1));
QVector<float> result = QtConcurrent::blockingMapped<QVector<float> >(v.begin(), v.end(), boost::bind(&MyClass::Test, &myClass, _1));


std::cout << result[0] << std::endl;
std::cout << result[0] << std::endl;
  return 0;
  return 0;
}
}

Revision as of 17:44, 12 March 2015

This article may require cleanup to meet the Qt Wiki's quality standards. Reason: Auto-imported from ExpressionEngine.
Please improve this article if you can. Remove the {{cleanup}} tag and add this page to Updated pages list after it's clean.

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>
  1. include <boost/bind.hpp>
  1. 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;

}