//
// This is a GUI support code to the chapters 12-16 of the book
// "Programming -- Principles and Practice Using C++" by Bjarne Stroustrup
//

#include "Simple_window.h"

//---------------------------------------------------------------------------

Simple_window::Simple_window(Point xy, int w, int h, const string& title) :
   Window(xy,w,h,title),
   next_button{Point(x_max()-70,0), 70, 20, "Next", cb_next},
   button_pushed{false}
{
   attach(next_button);
}

//---------------------------------------------------------------------------

bool Simple_window::wait_for_button()
// modified event loop:
// handle all events (as per default), quit when button_pushed becomes true
// this allows graphics without control inversion
{
   show();
   button_pushed = false;
#if 1
   // Simpler handler
   while (!button_pushed) Fl::wait();
   Fl::redraw();
#else
   // To handle the case where the user presses the X button in the
   // window frame to kill the application, change the condition to 0
   // to enable this branch.
   Fl::run();
#endif
   return button_pushed;
}

//--------------------------------------------------------------------------

void Simple_window::cb_next(Address, Address pw)
// call Simple_window::next() for the window located at pw
{  
   reference_to<Simple_window>(pw).next();    
}

//--------------------------------------------------------------------------

void Simple_window::next()
{
   button_pushed = true;
   hide();
}

//--------------------------------------------------------------------------