jpgshowctlctl.cpp

当时做多媒体作业

// JpgShowCtlCtl.cpp : Implementation of the CJpgShowCtlCtrl ActiveX Control class.

#include "stdafx.h"
#include "JpgShowCtl.h"
#include "JpgShowCtlCtl.h"
#include "JpgShowCtlPpg.h"
#include <afxpriv.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


IMPLEMENT_DYNCREATE(CJpgShowCtlCtrl, COleControl)


/////////////////////////////////////////////////////////////////////////////
// Message map

BEGIN_MESSAGE_MAP(CJpgShowCtlCtrl, COleControl)
	//{{AFX_MSG_MAP(CJpgShowCtlCtrl)
	ON_WM_LBUTTONDOWN()
	//}}AFX_MSG_MAP
	ON_OLEVERB(AFX_IDS_VERB_PROPERTIES, OnProperties)
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// Dispatch map

BEGIN_DISPATCH_MAP(CJpgShowCtlCtrl, COleControl)
	//{{AFX_DISPATCH_MAP(CJpgShowCtlCtrl)
	DISP_FUNCTION(CJpgShowCtlCtrl, "ShowFileName", ShowFileName, VT_EMPTY, VTS_BSTR)
	DISP_FUNCTION(CJpgShowCtlCtrl, "Erase", Erase, VT_EMPTY, VTS_NONE)
	DISP_FUNCTION(CJpgShowCtlCtrl, "SetBorderColor", SetBorderColor, VT_EMPTY, VTS_COLOR)
	//}}AFX_DISPATCH_MAP
END_DISPATCH_MAP()


/////////////////////////////////////////////////////////////////////////////
// Event map

BEGIN_EVENT_MAP(CJpgShowCtlCtrl, COleControl)
	//{{AFX_EVENT_MAP(CJpgShowCtlCtrl)
	EVENT_CUSTOM("DoubleMouse", FireDoubleMouse, VTS_NONE)
	//}}AFX_EVENT_MAP
END_EVENT_MAP()


/////////////////////////////////////////////////////////////////////////////
// Property pages

// TODO: Add more property pages as needed.  Remember to increase the count!
BEGIN_PROPPAGEIDS(CJpgShowCtlCtrl, 1)
	PROPPAGEID(CJpgShowCtlPropPage::guid)
END_PROPPAGEIDS(CJpgShowCtlCtrl)


/////////////////////////////////////////////////////////////////////////////
// Initialize class factory and guid

IMPLEMENT_OLECREATE_EX(CJpgShowCtlCtrl, "JPGSHOWCTL.JpgShowCtlCtrl.1",
	0x8ba321d6, 0xeaea, 0x4b51, 0xa5, 0x97, 0x5f, 0xe5, 0x2f, 0xa2, 0x2e, 0x85)


/////////////////////////////////////////////////////////////////////////////
// Type library ID and version

IMPLEMENT_OLETYPELIB(CJpgShowCtlCtrl, _tlid, _wVerMajor, _wVerMinor)


/////////////////////////////////////////////////////////////////////////////
// Interface IDs

const IID BASED_CODE IID_DJpgShowCtl =
		{ 0xcccfafd1, 0x6b70, 0x4523, { 0x84, 0x8e, 0x74, 0x4e, 0x31, 0xcc, 0x22, 0x7b } };
const IID BASED_CODE IID_DJpgShowCtlEvents =
		{ 0xfb22d2aa, 0x235b, 0x451c, { 0x9c, 0xa6, 0x5, 0x4f, 0x2d, 0x40, 0x6, 0x5b } };


/////////////////////////////////////////////////////////////////////////////
// Control type information

static const DWORD BASED_CODE _dwJpgShowCtlOleMisc =
	OLEMISC_ACTIVATEWHENVISIBLE |
	OLEMISC_SETCLIENTSITEFIRST |
	OLEMISC_INSIDEOUT |
	OLEMISC_CANTLINKINSIDE |
	OLEMISC_RECOMPOSEONRESIZE;

IMPLEMENT_OLECTLTYPE(CJpgShowCtlCtrl, IDS_JPGSHOWCTL, _dwJpgShowCtlOleMisc)


/////////////////////////////////////////////////////////////////////////////
// CJpgShowCtlCtrl::CJpgShowCtlCtrlFactory::UpdateRegistry -
// Adds or removes system registry entries for CJpgShowCtlCtrl

BOOL CJpgShowCtlCtrl::CJpgShowCtlCtrlFactory::UpdateRegistry(BOOL bRegister)
{
	// TODO: Verify that your control follows apartment-model threading rules.
	// Refer to MFC TechNote 64 for more information.
	// If your control does not conform to the apartment-model rules, then
	// you must modify the code below, changing the 6th parameter from
	// afxRegApartmentThreading to 0.

	if (bRegister)
		return AfxOleRegisterControlClass(
			AfxGetInstanceHandle(),
			m_clsid,
			m_lpszProgID,
			IDS_JPGSHOWCTL,
			IDB_JPGSHOWCTL,
			afxRegApartmentThreading,
			_dwJpgShowCtlOleMisc,
			_tlid,
			_wVerMajor,
			_wVerMinor);
	else
		return AfxOleUnregisterClass(m_clsid, m_lpszProgID);
}


/////////////////////////////////////////////////////////////////////////////
// CJpgShowCtlCtrl::CJpgShowCtlCtrl - Constructor

CJpgShowCtlCtrl::CJpgShowCtlCtrl()
{
	InitializeIIDs(&IID_DJpgShowCtl, &IID_DJpgShowCtlEvents);

	// TODO: Initialize your control's instance data here.
	m_jpgFileName=_T("");
	m_pPicture = NULL;	
	m_crBackground = ::GetSysColor(COLOR_3DFACE);
	m_borderColor=RGB(192,192,0);
}


/////////////////////////////////////////////////////////////////////////////
// CJpgShowCtlCtrl::~CJpgShowCtlCtrl - Destructor

CJpgShowCtlCtrl::~CJpgShowCtlCtrl()
{
	// TODO: Cleanup your control's instance data here.
	if(m_pPicture != NULL)
	{
		m_pPicture->Release();
		m_pPicture = NULL;
	}
}


/////////////////////////////////////////////////////////////////////////////
// CJpgShowCtlCtrl::OnDraw - Drawing function

void CJpgShowCtlCtrl::OnDraw(
			CDC* pdc, const CRect& rcBounds, const CRect& rcInvalid)
{
	// TODO: Replace the following code with your own drawing code.
	CRect rcClient;
	rcClient=rcBounds;	
	//涂上底色，并画框架
	CBrush Brush;
	Brush.CreateSolidBrush(m_borderColor); 
	pdc->FillRect(&rcClient, &Brush); 
	Brush.DeleteObject();
	Brush.CreateSolidBrush(m_crBackground); 
	rcClient.top=rcBounds.top+4;
	rcClient.bottom=rcClient.bottom-4;
	rcClient.left=rcClient.left+4;
	rcClient.right=rcClient.right-4;
	pdc->FillRect(&rcClient, &Brush); 
	Brush.DeleteObject();
	
	if(m_pPicture != NULL)
	{
		//获取调色板
		HPALETTE hPal;
		m_pPicture->get_hPal(reinterpret_cast<OLE_HANDLE *>(&hPal));
		//图像尺寸
		SIZE sizeHiMetric;
		m_pPicture->get_Width(reinterpret_cast<OLE_XSIZE_HIMETRIC *>(&sizeHiMetric.cx));
		m_pPicture->get_Height(reinterpret_cast<OLE_YSIZE_HIMETRIC *>(&sizeHiMetric.cy));

		//转换为像素单位
		const int HIMETRIC_PER_INCH = 2540;
		const int nPixelsPerInchX = ::GetDeviceCaps(pdc->GetSafeHdc(), LOGPIXELSX);
		const int nPixelsPerInchY = ::GetDeviceCaps(pdc->GetSafeHdc(), LOGPIXELSY);
		SIZE sizePixel;
		sizePixel.cx = (nPixelsPerInchX * sizeHiMetric.cx + HIMETRIC_PER_INCH / 2) / HIMETRIC_PER_INCH;
		sizePixel.cy = (nPixelsPerInchY * sizeHiMetric.cy + HIMETRIC_PER_INCH / 2) / HIMETRIC_PER_INCH;

		//设置调色板
		CPalette *pPalOld = NULL;
		if (hPal != NULL){
			TRACE(_T("CPicViewCtrl::OnPaint - RealizePalette\n"));
			pPalOld = pdc->SelectPalette(CPalette::FromHandle(hPal), FALSE);
			pdc->RealizePalette();
		}
		//实际绘图区域
		CRect rcDraw = rcClient;
		//实际显示图形范围
		SIZE sizeGraphRegion = sizeHiMetric;		
		
		//透明?
		DWORD dwAttr;
		if (FAILED(m_pPicture->get_Attributes(&dwAttr)) || (dwAttr & PICTURE_TRANSPARENT))
		{		
			CDC MemDC;
			MemDC.CreateCompatibleDC(pdc);
			CBitmap Bmp;
			Bmp.CreateCompatibleBitmap(pdc, rcDraw.Width(), rcDraw.Height());  

			CBitmap *pBmpOld = MemDC.SelectObject(&Bmp);
			CPalette *pPalMemOld = NULL;
			if (hPal != NULL){
				pPalMemOld = MemDC.SelectPalette(CPalette::FromHandle(hPal), FALSE);
				MemDC.RealizePalette();
			}

			CRect rc(0, 0, rcDraw.Width(), rcDraw.Height());  
			MemDC.FillSolidRect(&rc, m_crBackground);
		
			m_pPicture->Render(
				MemDC.GetSafeHdc(),
				0, 0, rc.Width(), rc.Height(),  
				0, sizeHiMetric.cy, sizeGraphRegion.cx, -sizeGraphRegion.cy,
				&rc
				);

			pdc->BitBlt(
				rcDraw.left, rcDraw.top, rcDraw.Width(), rcDraw.Height(), 
				&MemDC, 
				0, 0, 
				SRCCOPY
				);

			MemDC.SelectObject(pBmpOld);
			if (pPalMemOld != NULL){
				ASSERT(hPal != NULL);
				MemDC.SelectPalette(pPalMemOld, FALSE);
			}
		}
		else
		{
			//调用IPicture的Render绘图
			m_pPicture->Render(
				 pdc->GetSafeHdc(),
				 rcDraw.left, rcDraw.top, rcDraw.Width(), rcDraw.Height(),//+zoom,
				 0,sizeHiMetric.cy, sizeGraphRegion.cx, -sizeGraphRegion.cy,
				 &rcDraw
				 );
		}
		if (pPalOld != NULL)
		{
			ASSERT(hPal != NULL);
			pdc->SelectPalette(pPalOld, FALSE);
		}
	}
}


/////////////////////////////////////////////////////////////////////////////
// CJpgShowCtlCtrl::DoPropExchange - Persistence support

void CJpgShowCtlCtrl::DoPropExchange(CPropExchange* pPX)
{
	ExchangeVersion(pPX, MAKELONG(_wVerMinor, _wVerMajor));
	COleControl::DoPropExchange(pPX);

	// TODO: Call PX_ functions for each persistent custom property.

}


/////////////////////////////////////////////////////////////////////////////
// CJpgShowCtlCtrl::OnResetState - Reset control to default state

void CJpgShowCtlCtrl::OnResetState()
{
	COleControl::OnResetState();  // Resets defaults found in DoPropExchange

	// TODO: Reset any other control state here.
}


/////////////////////////////////////////////////////////////////////////////
// CJpgShowCtlCtrl message handlers

void CJpgShowCtlCtrl::ShowFileName(LPCTSTR strFileName) 
{
	// TODO: Add your dispatch handler code here
	m_borderColor=RGB(192,192,0);
	if(m_pPicture != NULL)
	{
		m_pPicture->Release();
		m_pPicture = NULL;
	}
	USES_CONVERSION;
	HRESULT hr = ::OleLoadPicturePath(
		const_cast<LPOLESTR>(T2COLE(strFileName)),
		NULL,
		0,
		0,
		IID_IPicture,
		reinterpret_cast<LPVOID *>(&m_pPicture)
		);
	if(GetSafeHwnd()) 
		Invalidate();	
}


void CJpgShowCtlCtrl::Erase() 
{
	// TODO: Add your dispatch handler code here
	if(m_pPicture != NULL)
	{
		m_pPicture->Release();
		m_pPicture = NULL;
	}
	m_borderColor=m_crBackground;
	if(GetSafeHwnd()) 
		Invalidate();
}

void CJpgShowCtlCtrl::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CRect rect;
	GetClientRect(rect);
	double a=(rect.right-rect.left)/2;
	double b=(rect.bottom-rect.top)/2;

	double x=point.x-(rect.left+rect.right)/2;
	double y=point.y-(rect.top+rect.bottom)/2;

	if((x*x)/(a*a)+(y*y)/(b*b)<=1)
	{
		FireDoubleMouse();		
	}
	COleControl::OnLButtonDown(nFlags, point);
}

void CJpgShowCtlCtrl::SetBorderColor(OLE_COLOR borderColor) 
{
	// TODO: Add your dispatch handler code here
	m_borderColor=borderColor;
}