/*##############################################################################
## Author: Shaun Reed                                                         ##
## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
## About: Input class from tutorials followed at trentreed.net                ##
##                                                                            ##
## Contact: shaunrd0@gmail.com	| URL: www.shaunreed.com | GitHub: shaunrd0   ##
##############################################################################*/

#ifndef QTOPENGL_INPUT_H
#define QTOPENGL_INPUT_H

#include <QPoint>
#include <Qt>

#include <qtkapi.h>
#include <qtkwidget.h>

namespace Qtk {
  class QTKAPI Input {
    friend class Qtk::QtkWidget;
  public:
    // Possible key states
    enum InputState
    {
      InputInvalid,
      InputRegistered,
      InputUnregistered,
      InputTriggered,
      InputPressed,
      InputReleased
    };

    // State checking
    inline static bool keyTriggered(Qt::Key key)
    { return keyState(key) == InputTriggered;}
    inline static bool keyPressed(Qt::Key key)
    { return keyState(key) == InputPressed;}
    inline static bool keyReleased(Qt::Key key)
    { return keyState(key) == InputReleased;}
    inline static bool buttonTriggered(Qt::MouseButton button)
    { return buttonState(button) == InputTriggered;}
    inline static bool buttonPressed(Qt::MouseButton button)
    { return buttonState(button) == InputPressed;}
    inline static bool buttonReleased(Qt::MouseButton button)
    { return buttonState(button) == InputReleased;}

    // Implementation
    static InputState keyState(Qt::Key key);
    static InputState buttonState(Qt::MouseButton button);

    static QPoint mousePosition();
    static QPoint mouseDelta();

  private:
    // State updating
    static void update();
    static void registerKeyPress(int key);
    static void registerKeyRelease(int key);
    static void registerMousePress(Qt::MouseButton button);
    static void registerMouseRelease(Qt::MouseButton button);
    static void reset();
  };
}

#endif // QTOPENGL_INPUT_H