win32 鼠标点击及消息管理系统-优快云博客

本文介绍了一个基于Win32的鼠标点击及消息管理系统。通过使用事件管理器类，文章详细解释了如何处理鼠标左键的按下、移动及释放事件，并将这些事件转化为自定义的消息类型，最终传递给游戏场景中的节点进行处理。

win32 鼠标点击及消息管理系统

我们来添加鼠标点击的响应和消息管理系统。

先来看消息管理。

/********************************************************************
 Copyright(C), 2012-2013,
 FileName:Events.h
 Description:
 Author:cloud
 Created:2014/11/21
 history:
21:11:2014 9:35 by
*********************************************************************/
#pragma once
namespace cloud
{


const unsigned int  MSG_Enter							=				1;
const unsigned int  MSG_Exit							=				2;
const unsigned int  MSG_SingleTouchBegan				=               3;
const unsigned int  MSG_SingleTouchMoved				=               4;
const unsigned int  MSG_SingleTouchEnded				=               5;


const unsigned int  MSG_User							=				10000;

}

/********************************************************************
 Copyright(C), 2012-2013,
 FileName:EventManager.h
 Description:
 Author:cloud
 Created:2014/11/21
 history:
21:11:2014 9:35 by
*********************************************************************/
#pragma once
#include "base/Singleton.h"
#include "export/Events.h"
namespace cloud
{
	class EventManager :public Singleton<EventManager>
	{
	public:
		DECLARE_SINGLETON_CREATE_DESTROY
		EventManager();
		~EventManager();
		void sendMessage(unsigned int message,void* param);
	};
}

/********************************************************************
 Copyright(C), 2012-2013,
 FileName:EventManager.cpp
 Description:
 Author:cloud
 Created:2014/11/21
 history:
21:11:2014 9:35 by
*********************************************************************/
#pragma once
#include "EventManager.h"
#include "base/Engine.h"
namespace cloud
{
	IMPLEMENT_SINGLETON_ALL(EventManager);
	EventManager::EventManager()
	{

	}

	EventManager::~EventManager()
	{

	}

	void EventManager::sendMessage(unsigned int message,void* param)
	{
		Scene * scene = Engine::getInstance()->getRunningScene();
		if (scene)
		{
			scene->dispatchMessage(message,param);
		}
	}
}

bool Node::dispatchMessage(unsigned int message,void* param)
	{
		if (getChildren()->size() > 0)//删除当前节点子节点
		{
			std::vector<Node*>::iterator itChild = _children.begin();
			while (itChild != _children.end())
			{
				if((*itChild)->dispatchMessage(message,param))
					return true;
				++itChild;
			}
			
		}
		
		return handerMessage(message,param);
	}
	
	bool Node::handerMessage(unsigned int message,void* param)
	{
		return false;
	}

它会把消息依次投递给子节点。子节点handerMessage如果返回true。表示该消息已经处理过了，就不会再投递了。

再看鼠标点击。

static bool _captured = false;
	static float _mouseX = 0.f;
	static float _mouseY = 0.f;
	

	static void onGLFWMouseCallBack(GLFWwindow* window, int button, int action, int modify)
	{		
		Size frameSize = Engine::getInstance()->getFrameSize();
		if(GLFW_MOUSE_BUTTON_LEFT == button)
		{
			if(GLFW_PRESS == action)
			{
				_captured = true;
				if (_mouseX < frameSize.width && _mouseX > 0.f && _mouseY > 0.f && _mouseY < frameSize.height)
				{
					Point touchPoint = Point(_mouseX,_mouseY);
					EventManager::getInstance()->sendMessage(MSG_SingleTouchBegan,&touchPoint);

				}
			}
			else if(GLFW_RELEASE == action)
			{
				if (_captured)
				{
					_captured = false;
					if (_mouseX < frameSize.width && _mouseX > 0.f && _mouseY > 0.f && _mouseY < frameSize.height)
					{
						Point touchPoint = Point(_mouseX,_mouseY);
						EventManager::getInstance()->sendMessage(MSG_SingleTouchEnded,&touchPoint);

					}
				}
			}
		}
	}

	static void onGLFWMouseMoveCallBack(GLFWwindow* window, double x, double y)
	{
		Size frameSize = Engine::getInstance()->getFrameSize();
		_mouseX = (float)x;
		_mouseY = frameSize.height - (float)y;

		if (_captured)
		{
			if (_mouseX < frameSize.width && _mouseX > 0.f && _mouseY > 0.f && _mouseY < frameSize.height)
			{
				Point touchPoint = Point(_mouseX,_mouseY);
				EventManager::getInstance()->sendMessage(MSG_SingleTouchMoved,&touchPoint);
			}
		}
	}

bool GameScene::handerMessage(unsigned int message,void* param)
	{
		switch (message)
		{
		case MSG_SingleTouchBegan:
			{
				Point* touPoint = (Point*) param;
				Rect rect = spr1->getRect(spr1->getPosition());
				if (rect.containsPoint(*touPoint))
				{
					LOG("touch begin is in sprite\r\n");
				}
			}
			break;
		case MSG_SingleTouchMoved:
			{
				Point* touPoint = (Point*) param;
				Rect rect = spr1->getRect(spr1->getPosition());
				if (rect.containsPoint(*touPoint))
				{
					LOG("touch move is in sprite\r\n");
				}
			}
			break;
		case MSG_SingleTouchEnded:
			{
				Point* touPoint = (Point*) param;
				Rect rect = spr1->getRect(spr1->getPosition());
				if (rect.containsPoint(*touPoint))
				{
					LOG("touch end is in sprite\r\n");
				}
			}
			break;
		default:
			break;
		}
		return true;
	}