keypresshandler.cpp

#include "keypresshandler.h"
#include <QKeyEvent>
#include <QEvent>

// -----------------------------------------------------------------------------
void KeyPressHandler::addKey(int key)
{
  pressed_keys_.insert(key);
}

// -----------------------------------------------------------------------------
void KeyPressHandler::removeKey(int key)
{
  if(pressed_keys_.find(key) != pressed_keys_.end())
    pressed_keys_.erase(pressed_keys_.find(key));
}

// -----------------------------------------------------------------------------
KeyPressHandler::KeyPressHandler() : pressed_keys_(std::set<int>())
{
}

// -----------------------------------------------------------------------------
bool KeyPressHandler::eventFilter(QObject *obj, QEvent *event)
{
  if(event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease)
  {
    QKeyEvent *key_event = static_cast<QKeyEvent*>(event);
    if(event->type() == QEvent::KeyPress) addKey(key_event->key());
    else if(event->type() == QEvent::KeyRelease) removeKey(key_event->key());
    emit pressedKeysChanged(pressed_keys_);
  }
  return QObject::eventFilter(obj, event);
}