OpenVulkano/openVulkanoCpp/Input/InputDeviceMouse.hpp

#pragma once
#include "InputDevice.hpp"
#include "../Base/Logger.hpp"

namespace openVulkanoCpp
{
	class IWindow;

	namespace Input
	{
		class InputDeviceMouse : public InputDevice
		{
			float axes[InputKey::Mouse::Axis::AXIS_LAST + 2] = { 0 };
			uint8_t pressedButtons = 0, lastPressedButtons = 0;
			double mousePosX = 0, mousePosY = 0;
			IWindow* lastWindow = nullptr;

		protected:
			InputDeviceMouse() = default;
			
			void Init(const int index, const std::string& name)
			{
				InputDevice::Init(InputDeviceType::MOUSE, index, name);

				ClearAxes();
				pressedButtons = 0;
				lastPressedButtons = 0;
				mousePosX = 0;
				mousePosY = 0;
				lastWindow = nullptr;
			}
			
			void UpdateButtons(uint8_t newPressedButtons)
			{
				lastPressedButtons = pressedButtons;
				pressedButtons = newPressedButtons;
				if (lastPressedButtons != pressedButtons)
					Logger::INPUT->debug("Mouse button state changed {0:08b}", pressedButtons);
			}

			void UpdatePosition(double posX, double posY)
			{
				axes[InputKey::Mouse::AXIS_X] = static_cast<float>(posX - mousePosX);
				axes[InputKey::Mouse::AXIS_Y] = static_cast<float>(posY - mousePosY);
				mousePosX = posX;
				mousePosY = posY;
				Logger::INPUT->debug("Mouse moved posX: {0} posY: {1}, relativeX: {2}, relativeY: {3}", posX, posY, axes[InputKey::Mouse::AXIS_X], axes[InputKey::Mouse::AXIS_Y]);
			}

			void UpdateWheel(float wheelX, float wheelY)
			{
				axes[InputKey::Mouse::AXIS_WHEEL_X] = wheelX;
				axes[InputKey::Mouse::AXIS_WHEEL_Y] = wheelY;
				Logger::INPUT->debug("Mouse scrolled x: {0} y: {1}", wheelX, wheelY);
			}

			void UpdateActiveWindow(IWindow* window)
			{
				ClearAxes();
				lastWindow = window;
			}

			void ClearAxes()
			{
				for (float& axis : axes)
				{
					axis = 0;
				}
			}

		private:
			bool GetLastButton(InputKey::Mouse::Button button) const
			{
				return lastPressedButtons & (1 << button);
			}

		protected:
			float ReadAxis(int16_t key) const override final
			{
				return GetAxis(static_cast<InputKey::Mouse::Axis>(key));
			}

			bool ReadButton(int16_t key) const override final
			{
				return GetButton(static_cast<InputKey::Mouse::Button>(key));
			}

			bool ReadButtonUp(int16_t key) const override final
			{
				return GetButtonUp(static_cast<InputKey::Mouse::Button>(key));
			}

			bool ReadButtonDown(int16_t key) const override final
			{
				return GetButtonDown(static_cast<InputKey::Mouse::Button>(key));
			}

		public:
			bool GetButton(const InputKey::Mouse::Button button) const
			{
				return pressedButtons & (1 << button);
			}

			bool GetButtonUp(const InputKey::Mouse::Button button) const
			{
				return !GetButton(button) && GetLastButton(button);
			}

			bool GetButtonDown(const InputKey::Mouse::Button button) const
			{
				return GetButton(button) && !GetLastButton(button);
			}

			float GetAxis(const InputKey::Mouse::Axis axis) const
			{
				return axes[axis];
			}

			float GetWheel() const
			{
				return GetAxis(InputKey::Mouse::Axis::AXIS_WHEEL_Y);
			}

			float GetWheelX() const
			{
				return GetAxis(InputKey::Mouse::Axis::AXIS_WHEEL_X);
			}

			float GetWheelY() const
			{
				return GetAxis(InputKey::Mouse::Axis::AXIS_WHEEL_Y);
			}

			glm::vec2 GetMousePosition() const
			{
				return { mousePosX, mousePosY };
			}

			void GetMousePosition(double& posX, double& posY) const
			{
				posX = mousePosX;
				posY = mousePosY;
			}

			glm::vec2 GetMousePosition(const IWindow* window) const
			{
				if (window == lastWindow)
				{
					return { mousePosX, mousePosY };
				}
				return { std::numeric_limits<float>::quiet_NaN(), std::numeric_limits<float>::quiet_NaN() };
			}

			void GetMousePosition(const IWindow* window, double& posX, double& posY) const
			{
				if (window == lastWindow)
				{
					posX = mousePosX;
					posY = mousePosY;
				}
				else
				{
					posX = std::numeric_limits<double>::quiet_NaN();
					posY = std::numeric_limits<double>::quiet_NaN();
				}
			}

			IWindow* GetActiveWindow() const
			{
				return lastWindow;
			}

			bool IsInWindow(const IWindow* window) const
			{
				return window == lastWindow;
			}
		};
	}
}