/****************************************************************************************** 
 *	Chili DirectX Framework Version 16.07.20											  *	
 *	Mouse.cpp																			  *
 *	Copyright 2016 PlanetChili <http://www.planetchili.net>								  *
 *																						  *
 *	This file is part of The Chili DirectX Framework.									  *
 *																						  *
 *	The Chili DirectX Framework is free software: you can redistribute it and/or modify	  *
 *	it under the terms of the GNU General Public License as published by				  *
 *	the Free Software Foundation, either version 3 of the License, or					  *
 *	(at your option) any later version.													  *
 *																						  *
 *	The Chili DirectX Framework 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 General Public License for more details.										  *
 *																						  *
 *	You should have received a copy of the GNU General Public License					  *
 *	along with The Chili DirectX Framework.  If not, see <http://www.gnu.org/licenses/>.  *
 ******************************************************************************************/
#include "Mouse.h"
#include "Window.h"


std::pair<int,int> Mouse::GetPos() const noexcept
{
	return { x,y };
}

int Mouse::GetPosX() const noexcept
{
	return x;
}

int Mouse::GetPosY() const noexcept
{
	return y;
}

bool Mouse::IsInWindow() const noexcept
{
	return isInWindow;
}

bool Mouse::LeftIsPressed() const noexcept
{
	return leftIsPressed;
}

bool Mouse::RightIsPressed() const noexcept
{
	return rightIsPressed;
}

Mouse::Event Mouse::Read() noexcept
{
	if( buffer.size() > 0u )
	{
		Mouse::Event e = buffer.front();
		buffer.pop();
		return e;
	}
	else
	{
		return Mouse::Event();
	}
}

void Mouse::Flush() noexcept
{
	buffer = std::queue<Event>();
}

void Mouse::OnMouseMove( int newx,int newy ) noexcept
{
	x = newx;
	y = newy;

	buffer.push( Mouse::Event( Mouse::Event::Type::Move,*this ) );
	TrimBuffer();
}

void Mouse::OnMouseEnter() noexcept
{
	isInWindow = true;

	buffer.push(Mouse::Event(Mouse::Event::Type::Enter, *this));
	TrimBuffer();
}

void Mouse::OnMouseLeave() noexcept
{
	isInWindow = false;

	buffer.push(Mouse::Event(Mouse::Event::Type::Leave, *this));
	TrimBuffer();
}

void Mouse::OnLeftPressed( int x,int y ) noexcept
{
	leftIsPressed = true;

	buffer.push( Mouse::Event( Mouse::Event::Type::LPress,*this ) );
	TrimBuffer();
}

void Mouse::OnLeftReleased( int x,int y ) noexcept
{
	leftIsPressed = false;

	buffer.push( Mouse::Event( Mouse::Event::Type::LRelease,*this ) );
	TrimBuffer();
}

void Mouse::OnRightPressed( int x,int y ) noexcept
{
	rightIsPressed = true;

	buffer.push( Mouse::Event( Mouse::Event::Type::RPress,*this ) );
	TrimBuffer();
}

void Mouse::OnRightReleased( int x,int y ) noexcept
{
	rightIsPressed = false;

	buffer.push( Mouse::Event( Mouse::Event::Type::RRelease,*this ) );
	TrimBuffer();
}

void Mouse::OnWheelUp( int x,int y ) noexcept
{
	buffer.push( Mouse::Event( Mouse::Event::Type::WheelUp,*this ) );
	TrimBuffer();
}

void Mouse::OnWheelDown( int x,int y ) noexcept
{
	buffer.push( Mouse::Event( Mouse::Event::Type::WheelDown,*this ) );
	TrimBuffer();
}

void Mouse::TrimBuffer() noexcept
{
	while( buffer.size() > bufferSize )
	{
		buffer.pop();
	}
}

void Mouse::OnWheelDelta(int x, int y, int delta) noexcept
{
	wheelDeltaCarry += delta;
	// generate events for every 120
	// 默认每次达到120，执行一次滚轮事件。如果数字够大，可以执行复数次
	while (wheelDeltaCarry >= WHEEL_DELTA)
	{
		wheelDeltaCarry -= WHEEL_DELTA;
		OnWheelUp(x, y);
	}
	while (wheelDeltaCarry <= -WHEEL_DELTA)
	{
		wheelDeltaCarry += WHEEL_DELTA;
		OnWheelDown(x, y);
	}
}