CPP/Boost/Signals/ClassMemberWithParameters - Revision history

Daviddoria at 16:28, 1 February 2011

2011-02-01T16:28:20Z

Daviddoria at 16:04, 1 February 2011

2011-02-01T16:04:42Z

Daviddoria: Created page with '==ClassMemberWithParameters.cpp== #include #include #include class InteractorStyle { public: boost::signal<…'

2011-02-01T15:56:19Z

Created page with '==ClassMemberWithParameters.cpp== <source lang="cpp"> #include <boost/signal.hpp> #include <boost/bind.hpp> #include <iostream> class InteractorStyle { public: boost::signal<…'

New page

==ClassMemberWithParameters.cpp==
<source lang="cpp">
#include <boost/signal.hpp>
#include <boost/bind.hpp>

#include <iostream>

class InteractorStyle
{
public:
boost::signal<void (float)> UpdateData;
};

class Form
{
private:
InteractorStyle MyInteractorStyle;
float Data;
public:
Form()
{
MyInteractorStyle.UpdateData.connect(boost::bind(&Form::DataUpdated, this));
}

void DataUpdated(float data)
{
this->Data = data;
std::cout << "Data updated!" << std::endl;
}

void TellInteractorToUpdate()
{
// This is just for the demo - it would really be caused by a user event
MyInteractorStyle.UpdateData(5.1);
}

void OutputData()
{
std::cout << "Data: " << Data << std::endl;
}

};

int main()
{
Form MyForm;
MyForm.TellInteractorToUpdate(); // This is just for the demo - it would really be caused by a user event
MyForm.OutputData();
}
</source>

==CMakeLists.txt==
<source lang="cmake">
cmake_minimum_required(VERSION 2.6)

Project(ClassMemberWithParameters)

ADD_EXECUTABLE(ClassMemberWithParameters ClassMemberWithParameters.cpp)
TARGET_LINK_LIBRARIES(ClassMemberWithParameters boost_signals-mt)

</source>

@@ Line 20: / Line 20: @@
    Form()
+   {
-     MyInteractorStyle.UpdateData.connect(boost::bind(&Form::DataUpdated, this, _1));
+     MyInteractorStyle.UpdateData.connect(boost::bind(&Form::DataUpdated, this, _1)); // _1 is a placeholder for the 1st argment
+   }

@@ Line 20: / Line 20: @@
    Form()
+   {
-     MyInteractorStyle.UpdateData.connect(boost::bind(&Form::DataUpdated, this));
+     MyInteractorStyle.UpdateData.connect(boost::bind(&Form::DataUpdated, this, _1));
+   }