"c++ callback member function" Code Answer's
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c++ callback member function
class Foo {
int (*func)(int);
public:
void setCallback( int (*cFunc)(int) ) {
func = cFunc;
}
void set() {
setCallback(callback); // Set callback function to be called later
}
void use() {
func(5); // Call the previously set callback function
}
// Note the 'static'
static int callback(int param) {
return 1;
}
};
c++ callback function
// C++ callback function
class Base {
public:
void doSomething() {
using namespace std::placeholders;
// std::placeholders::_1 is for the callback parameter
// use _1 for 1 argument
// or _1, _2, _3 for 3 arguments and so on
something.setCallback(std::bind(&Base::callback, this, _1));
// std::bind is needed, otherwise
// the callback function would need to be static
}
// Callback function
void callback(int i) {
std::cout << "Callback: " << i << std::endl;
}
}
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