COM from scratch - PART TWO

// Component1Wnd.cpp : implementation file
//

#include "stdafx.h"
//#include "	\ add additional includes here"
#include "Component1Wnd.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define	WM_RELEASE	(WM_USER+0x500)
/////////////////////////////////////////////////////////////////////////////
// CComponent1Wnd

CComponent1Wnd::CComponent1Wnd():m_pComponent1sIUnknown(NULL),m_nItemID(0)
{
  m_cRef=0;
//Background color for menu when selected with mouse 
	m_color_hittest=4294967295;
//this color will be changed either by the client's view window(OnLeftButtonDown)
//or by the function OnNcLButtonDown
  m_bMenuHasOpend=false;
}

CComponent1Wnd::~CComponent1Wnd()
{
delete this;
}


BEGIN_MESSAGE_MAP(CComponent1Wnd, CWnd)
	//{{AFX_MSG_MAP(CComponent1Wnd)
	ON_WM_MOUSEMOVE()
	ON_WM_MENUSELECT()
	ON_WM_TIMER()
	ON_WM_NCLBUTTONDOWN()
	ON_WM_MOVE()
	ON_WM_LBUTTONDOWN()
	//}}AFX_MSG_MAP
ON_MESSAGE(WM_RELEASE,OnRelease)
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CComponent1Wnd message handlers
void CComponent1Wnd::OnMouseMove(UINT nFlags, CPoint point)
{
    char buf[10];
	CRect rect;
	CDC*  pDC=GetDC();
	GetClientRect (&rect);
	CBrush daybrush;
	CBrush sunsetbrush;
	daybrush.CreateSolidBrush (RGB(0,255,255));
	pDC->FillRect(&rect,&daybrush);
	CClientDC dc(this);
	CBitmap bmp, *poldbmp;
	CDC memdc;
	bmp.LoadBitmap("IDB_SUN" );
	memdc.CreateCompatibleDC( &dc );
	poldbmp = memdc.SelectObject( &bmp );
	dc.BitBlt(point.x,point.y+5, 100, 100, &memdc, 0, 0, SRCCOPY );
	memdc.SelectObject( poldbmp );
	COLORREF currentskycolor=pDC->GetPixel (point);
	
	if((point.y==rect.bottom )|(point.x==rect.right)|(point.x==rect.left ))
	{
		sunsetbrush.CreateSolidBrush(RGB(192,192,192));
		pDC->FillRect(&rect,&sunsetbrush);
		
	}
	GetClientRect (&rect);
	pDC->DrawText(itoa(m_cRef,buf,10),&rect,DT_RIGHT);
	
	CWnd::OnMouseMove(nFlags, point);
}

//---------------------------------------------------------------------------//
// In this function if the left mouse click has been outside of the components
// window and into the client's view window ,the client calls the compoents
// MenuitemNotselected() method and in this method the m_color_hittest will
// be set to white color and menu item selections will not activate Components
// mthods.(Not a good solution, as the menu item will be selected if the
//left mouse click is outside of the client's view window)
///-------------------------------------------------------------------------
///////////////////////////////////////////////////////////////////////////
void CComponent1Wnd::OnMenuSelect(UINT nItemID, UINT nFlags, HMENU hSysMenu)
{
	
	//Tracking the last selected menu item
	if(nItemID!=0)
		m_nItemID=nItemID;//Geting the lost selected menu item
	// Making sure that menu has been opened
	if((nItemID==32776)||(nItemID==32790))// if((ID_ADDREF) or (ID_NIGHT)) has  selected once
		m_bMenuHasOpend=true;
	
	
	if((nFlags==0xFFFF)&&(hSysMenu==0))//mouse click has been outside of menu
	{
		TRACE(_T("Cliked out side menu\n"));
		SetTimer(1,100,NULL);//seting a timer event and checking which item has been selected lost
	}
	CWnd::OnMenuSelect(nItemID, nFlags, hSysMenu);
}

//////////////////////////////////////////////////////////////
LRESULT CComponent1Wnd::OnRelease(WPARAM wParam,LPARAM lParam)
{
TRACE(_T("RELEASE message is received from CComponent1Wnd::OnRelease \n"));
m_pComponent1sIUnknown->Release();
return 0L;
}

////////////////////////////////////////////
void CComponent1Wnd::OnTimer(UINT nIDEvent)
{
	
	CString str="";
	CStdioFile file;
	KillTimer(nIDEvent);
	
	if((m_color_hittest==4294967295)&&(m_bMenuHasOpend))
	{
		switch(m_nItemID)
		{
			
		    case 32776://ID_ADDREF
				
				TRACE(_T("ADDREF\n"));
				m_pComponent1sIUnknown->AddRef();
				break;
				
			case 32777://ID_RELEASE
				TRACE(_T("RELEASE\n"));
				WindowProc(WM_RELEASE,0,0);// or  m_pComponent1sIUnknown->Release();
			    break;
				
				
			case 32790://ID_NIGHT
				//There is a Timer assosicated with the View class of the client
				//and in OnTimer(...) member function of the View class the value
				//from the file "Com1Notifyclient.txt" will be read and if the value
				//is "1" the client calls the Components Night() method.
				str="1";
				file.Open("C:\\Comp1Notifyclient.txt",CFile::modeWrite|CFile::typeText);
				file.WriteString(str);
				file.Close();
				break;
		}
		
	}
	CWnd::OnTimer(nIDEvent);
}





////////////////////////////////////////////////////////////////
void CComponent1Wnd::OnNcLButtonDown(UINT nHitTest, CPoint point)
{
	
	TRACE(_T("OnNcLButtonDown\n"));
	CDC* pDC=GetDC();
	
	if(m_bMenuHasOpend)
	{
		
		m_bMenuHasOpend=false;
		m_color_hittest=pDC->GetPixel (point);
	}
	
	CWnd::OnNcLButtonDown(nHitTest, point);
}


///////////////////////////////////////////
void CComponent1Wnd::OnMove(int x, int y)
{
	CRect rect;
	CDC*  pDC=GetDC();
	GetClientRect (&rect);
	CPoint point;
	point.x =rect.right/2;
	point.y=rect.bottom /2;
	COLORREF pixelcolor;
	pixelcolor=pDC->GetPixel(point);
	if(pixelcolor!=RGB(192,192,192))
	{
		
		CBrush brush;
		brush.CreateSolidBrush (RGB(0,255,255));
		pDC->FillRect(&rect,&brush);
		CClientDC dc(this);
		CBitmap bmp, *poldbmp;
		CDC memdc;
		bmp.LoadBitmap("IDB_SUN" );
		memdc.CreateCompatibleDC( &dc );
		poldbmp = memdc.SelectObject( &bmp );
		dc.BitBlt(rect.right -100,rect.bottom /4, 100, 100, &memdc, 0, 0, SRCCOPY );
		memdc.SelectObject( poldbmp );
		
	}
	CWnd::OnMove(x, y);
}


void CComponent1Wnd::OnLButtonDown(UINT nFlags, CPoint point) 
{
	CDC* pDC=GetDC();
	m_color_hittest=pDC->GetPixel(point);
	if(m_color_hittest==RGB(0,255,255))
	TRACE(_T("backgraound color\n"));	
	CWnd::OnLButtonDown(nFlags, point);
	
}