finalcut/examples/timer.cpp

/***********************************************************************
* timer.cpp - Using timer events                                       *
*                                                                      *
* This file is part of the Final Cut widget toolkit                    *
*                                                                      *
* Copyright 2014-2020 Markus Gans                                      *
*                                                                      *
* The Final Cut is free software; you can redistribute it and/or       *
* modify it under the terms of the GNU Lesser General Public License   *
* as published by the Free Software Foundation; either version 3 of    *
* the License, or (at your option) any later version.                  *
*                                                                      *
* The Final Cut is distributed in the hope that it will be useful,     *
* but WITHOUT ANY WARRANTY; without even the implied warranty of       *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
* GNU Lesser General Public License for more details.                  *
*                                                                      *
* You should have received a copy of the GNU Lesser General Public     *
* License along with this program.  If not, see                        *
* <http://www.gnu.org/licenses/>.                                      *
***********************************************************************/

#include <final/final.h>

namespace fc = finalcut::fc;


//----------------------------------------------------------------------
// class Timer
//----------------------------------------------------------------------

class Timer final : public finalcut::FWidget
{
  public:
    // Constructor
    explicit Timer (finalcut::FWidget* = nullptr);

  protected:
    // Method
    void draw() override;

    // Event handlers
    void onTimer (finalcut::FTimerEvent*) override;
    void onAccel (finalcut::FAccelEvent*) override;
};

//----------------------------------------------------------------------
Timer::Timer (finalcut::FWidget* parent)
  : finalcut::FWidget{parent}
{
  addTimer (60000);              // 1-minute timer
  const int id = addTimer (50);  // 50-millisecond timer
  addTimer (1000);               // 1-second timer
  delTimer (id);
  addTimer (250);                // 250-millisecond timer

  setFWidgetColors().term_fg = fc::Default;
  setFWidgetColors().term_bg = fc::Default;
}

//----------------------------------------------------------------------
void Timer::draw()
{
  print() << finalcut::FPoint{1, 1}
          << "---------------\n"
          << "Press Q to quit\n"
          << "---------------\n";
  setAreaCursor ({1, 4}, true, getVirtualDesktop());
}

//----------------------------------------------------------------------
void Timer::onTimer (finalcut::FTimerEvent* ev)
{
  bool is_last_line{false};
  const int timer_id = ev->getTimerId();

  if ( getPrintPos().getY() == int(getDesktopHeight()) )
    is_last_line = true;

  print() << finalcut::FColorPair {FColor(1 + timer_id)}
          << "Timer event, id " << timer_id << '\n';

  if ( is_last_line )
    scrollAreaForward (getVirtualDesktop());

  setAreaCursor ({1, getPrintPos().getY()}, true, getVirtualDesktop());
}

//----------------------------------------------------------------------
void Timer::onAccel (finalcut::FAccelEvent* ev)
{
  quit();
  ev->accept();
}


//----------------------------------------------------------------------
//                               main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
  // Create the application object
  finalcut::FApplication app{argc, argv};
  app.setForegroundColor(fc::Default);
  app.setBackgroundColor(fc::Default);

  // Create a timer object t
  Timer t{&app};
  t.addAccelerator('q');

  // Set the timer object t as main widget
  finalcut::FWidget::setMainWidget(&t);

  // Show and start the application
  t.show();
  return app.exec();
}