example_combox.cpp

#include <nana/gui.hpp>
#include <nana/gui/widgets/combox.hpp>
#include <iostream> 
int main()
{
        using namespace nana;      //No Minimize button, no maximize button and sizable frame.
        form fm(API::make_center(240, 100), appear::decorate<>());
        fm.caption(("Nana C++ Library - Example"));
        combox child ( fm, nana::rectangle ( 20, 3, 150, 30) );
        child.push_back("Item 1");
        child.push_back("Item 2");
        child.push_back("Item 3");
        child.push_back("Item 4");
        child.push_back("Item 5");
                                // This function will be called after changing the combox text by selecting 
                                // a text from the drop-down list.
       // dont use the arg info
        //child.events().selected ( []( ){ std::cout<<"selected a new text"<<std::endl; });

       // use the arg info
        child.events().selected ( [](const arg_combox &ar_cbx){ std::cout<<ar_cbx.widget.caption()<<std::endl; });
        fm.show();
        exec(

#ifdef NANA_AUTOMATIC_GUI_TESTING

                1, 1, [&child]()
        {
                click(child);
                child.option(3);
                child.events().selected.emit(arg_combox{ child }, child);

        }
#endif

        );
}