//: C11:ResponsiveUI.cpp {RunByHand}
// From "Thinking in C++, Volume 2", by Bruce Eckel & Chuck Allison.
// (c) 1995-2004 MindView, Inc. All Rights Reserved.
// See source code use permissions stated in the file 'License.txt',
// distributed with the code package available at www.MindView.net.
// Threading for a responsive user interface.
//{L} ZThread
#include <iostream>
#include <fstream>
#include <string>
#include "zthread/Thread.h"
using namespace ZThread;
using namespace std;

class DisplayTask : public Runnable {
  ifstream in;
  string line;
  bool quitFlag;
public:
  DisplayTask(const string& file) : quitFlag(false) {
    in.open(file.c_str());
  }
  ~DisplayTask() { in.close(); }
  void run() {
    while(getline(in, line) && !quitFlag) {
      cout << line << endl;
      Thread::sleep(1000);
    }
  }
  void quit() { quitFlag = true; }
};

int main() {
  try {
    cout << "Press <Enter> to quit:" << endl;
    DisplayTask* dt = new DisplayTask("ResponsiveUI.cpp");
    Thread t(dt);
    cin.get();
    dt->quit();
  } catch(Synchronization_Exception& e) {
    cerr << e.what() << endl;
  }
  cout << "Shutting down..." << endl;
} ///:~