D:/Programming/GUI Editor (Source)/GUIEventHandler.cpp

#include "StdAfx.h"
#include "GUI.h"

CGUIEventHandler::CGUIEventHandler(UINT MaxMessages)
{
        m_uiMessageCount = MaxMessages;
        m_pMessages = new tGUIMessage[MaxMessages];
        m_uiLastUnusedMessage = 0;
}

CGUIEventHandler::~CGUIEventHandler()
{
        if(m_pMessages !=NULL)
                SAFEDEL_ARRAY(m_pMessages)
}

int CGUIEventHandler::PostMessage(CGUIElement *pSender, CGUIElement *pReceiver, eGUIMessage eMessage, DWORD lParam, DWORD wParam, UINT uiTimeoutMs)
{
        tGUIMessage *NewMessage = NULL;
        UINT NewUnusedMessage = 0;


        for (UINT i=0; i<m_uiMessageCount; i++)
        {
                if(m_pMessages[i].bUsed == false && NewMessage != NULL)
                {
                        m_uiLastUnusedMessage = i;
                        break;
                }

                if(m_pMessages[i].bUsed == false && NewMessage == NULL)
                        NewMessage = (tGUIMessage *)&m_pMessages[i];
        }

        if(NewMessage !=NULL)
        {
                NewMessage->pReceiver = pReceiver;
                NewMessage->pSender = pSender;
                NewMessage->uiMessage = eMessage;
                NewMessage->dwTimeout = uiTimeoutMs;
                NewMessage->dwCreateTime = m_Timer.GetAbsoluteTime();
                NewMessage->dwParam[0] = lParam;
                NewMessage->dwParam[1] = wParam;
                NewMessage->bUsed = true;

                return 1;
        }

        return 0;
}

void CGUIEventHandler::Dispatch(bool bOnce)
{
        for (int i=0; i<m_uiMessageCount; i++)
        {
                tGUIMessage *pMessage = (tGUIMessage *)&m_pMessages[i];
                if(m_pMessages[i].bUsed)
                {
                        double CurrentTime = m_Timer.GetAbsoluteTime();
                        if(CurrentTime - m_pMessages[i].dwCreateTime)
                        {
                                if(pMessage->pReceiver !=NULL)
                                {
                                        pMessage->pReceiver->ProcessMessage(*pMessage);
                                        if(bOnce)
                                                pMessage->bUsed = false;
                                }
                        }
                }               
        }
}

tGUIMessage *CGUIEventHandler::GetMessage(UINT uiIndex)
{
        if(uiIndex >=0 && uiIndex < m_uiMessageCount)
                return (tGUIMessage *)&m_pMessages[uiIndex];

        return NULL;
}

void CGUIEventHandler::Flush()
{
        for (int i=0; i<m_uiMessageCount; i++)
        {
                tGUIMessage *pMessage = (tGUIMessage *)&m_pMessages[i];
                pMessage->bUsed = false;
                pMessage->uiMessage = 0;
                pMessage->pSender = pMessage->pReceiver = NULL;
        }
}

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