#include <qtimer></qtimer>

#include "toonz/tscenehandle.h"

#include "toonz/toonzscene.h"

#include "toonz/tproject.h"

//=============================================================================

// TSceneHandle

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

TSceneHandle::TSceneHandle() : m_scene(0), m_dirtyFlag(false) {}

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

TSceneHandle::~TSceneHandle() {}

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

ToonzScene *TSceneHandle::getScene() const { return m_scene; }

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

void TSceneHandle::setScene(ToonzScene *scene) {

  if (m_scene == scene) return;

  ToonzScene *oldscene = m_scene;

  m_scene = scene;

  if (m_scene) emit sceneSwitched();

  // Prevent memory corruption caused by delayed signals writing into the

  // discarded old scene while that memory was freed.

  // That made OT had a chance of crashing when project or scene changed rapidly.

  // Note: This is not the best solution but "it just works"

  if (oldscene) {

    QTimer *delayedTimer = new QTimer(this);

    delayedTimer->setSingleShot(true);

    connect(delayedTimer, &QTimer::timeout, [=]() {

      delete oldscene;

      delayedTimer->deleteLater();

    });

    delayedTimer->start(3000);  // 1 sec was enough, but... dunno about toasters

  }

}