www.pudn.com > vc++peizhun.rar > FreTransView.cpp

// FreTransView.cpp : implementation of the CFreTransView class 
// 
 
#include "stdafx.h" 
#include "FreTrans.h" 
 
#include "FreTransDoc.h" 
#include "FreTransView.h" 
#include "MainFrm.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CFreTransView 
 
IMPLEMENT_DYNCREATE(CFreTransView, CScrollView) 
 
BEGIN_MESSAGE_MAP(CFreTransView, CScrollView) 
	//{{AFX_MSG_MAP(CFreTransView) 
	ON_WM_ERASEBKGND() 
	ON_COMMAND(ID_EDIT_COPY, OnEditCopy) 
	ON_UPDATE_COMMAND_UI(ID_EDIT_COPY, OnUpdateEditCopy) 
	ON_COMMAND(ID_EDIT_PASTE, OnEditPaste) 
	ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateEditPaste) 
	ON_COMMAND(ID_FREQ_DCT, OnFreqDct) 
	ON_COMMAND(ID_FREQ_FOUR, OnFreqFour) 
	ON_COMMAND(ID_FREQ_WALH, OnFreqWalh) 
	//}}AFX_MSG_MAP 
	// Standard printing commands 
	ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CScrollView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview) 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CFreTransView construction/destruction 
 
CFreTransView::CFreTransView() 
{ 
	// TODO: add construction code here 
 
} 
 
CFreTransView::~CFreTransView() 
{ 
} 
 
BOOL CFreTransView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
 
	return CScrollView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CFreTransView drawing 
 
void CFreTransView::OnDraw(CDC* pDC) 
{ 
	BeginWaitCursor(); 
 
	CFreTransDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
 
	HDIB hDIB = pDoc->GetHDIB(); 
	if (hDIB != NULL) 
	{ 
		LPSTR lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) hDIB); 
		int cxDIB = (int) pDoc->GetDibImage()->DIBWidth(lpDIB); 
		int cyDIB = (int) pDoc->GetDibImage()->DIBHeight(lpDIB); 
 
		::GlobalUnlock((HGLOBAL) hDIB); 
		 
		CRect rcDIB; 
		rcDIB.top = rcDIB.left = 0; 
		rcDIB.right = cxDIB; 
		rcDIB.bottom = cyDIB; 
		 
		CRect rcDest; 
		 
		if (pDC->IsPrinting()) 
		{ 
			// 是打印，计算输出图像的位置和大小，以便符合页面 
			 
			// 获取打印页面的水平宽度(象素) 
			int cxPage = pDC->GetDeviceCaps(HORZRES);			 
			// 获取打印页面的垂直高度(象素) 
			int cyPage = pDC->GetDeviceCaps(VERTRES);			 
			// 获取打印机每英寸象素数 
			int cxInch = pDC->GetDeviceCaps(LOGPIXELSX); 
			int cyInch = pDC->GetDeviceCaps(LOGPIXELSY); 
			 
			// 计算打印图像大小（缩放，根据页面宽度调整图像大小） 
			rcDest.top = rcDest.left = 0; 
			rcDest.bottom = (int)(((double)cyDIB * cxPage * cyInch) 
					/ ((double)cxDIB * cxInch)); 
			rcDest.right = cxPage; 
			 
			// 计算打印图像位置（垂直居中） 
			int temp = cyPage - (rcDest.bottom - rcDest.top); 
			rcDest.bottom += temp/2; 
			rcDest.top += temp/2; 
		} 
		else    
		{ 
			// 不必缩放图像 
			rcDest = rcDIB; 
		} 
		 
		pDoc->GetDibImage()->PaintDIB(pDC->m_hDC, &rcDest, pDoc->GetHDIB(), 
			&rcDIB, pDoc->GetDocPalette()); 
	} 
	 
	EndWaitCursor(); 
} 
 
void CFreTransView::OnInitialUpdate() 
{ 
	CScrollView::OnInitialUpdate(); 
 
	// TODO: calculate the total size of this view 
	 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CFreTransView printing 
 
BOOL CFreTransView::OnPreparePrinting(CPrintInfo* pInfo) 
{ 
	// 设置总页数为一。 
	pInfo->SetMaxPage(1); 
 
	return DoPreparePrinting(pInfo); 
} 
 
void CFreTransView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
	// TODO: add extra initialization before printing 
} 
 
void CFreTransView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
	// TODO: add cleanup after printing 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CFreTransView diagnostics 
 
#ifdef _DEBUG 
void CFreTransView::AssertValid() const 
{ 
	CScrollView::AssertValid(); 
} 
 
void CFreTransView::Dump(CDumpContext& dc) const 
{ 
	CScrollView::Dump(dc); 
} 
 
CFreTransDoc* CFreTransView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CFreTransDoc))); 
	return (CFreTransDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CFreTransView message handlers 
 
BOOL CFreTransView::OnEraseBkgnd(CDC* pDC)  
{ 
	// 主要是为了设置子窗体默认的背景色 
	// 背景色由文档成员变量m_refColorBKG指定 
 
	CFreTransDoc* pDoc = GetDocument(); 
	CBrush brush(pDoc->m_refColorBKG);                                               
	CBrush* pOldBrush = pDC->SelectObject(&brush); 
		 
	CRect rectClip; 
	pDC->GetClipBox(&rectClip);			// 获取重绘区域	 
	pDC->PatBlt(rectClip.left, rectClip.top, rectClip.Width(),  
		rectClip.Height(), PATCOPY); 
 
	pDC->SelectObject(pOldBrush);                                                   
 
	return TRUE; 
} 
 
void CFreTransView::OnEditCopy()  
{ 
	// 复制当前图像 
 
	CFreTransDoc* pDoc = GetDocument(); 
	 
	if (OpenClipboard()) 
	{ 
		BeginWaitCursor(); 
		EmptyClipboard(); 
		 
		// 复制当前图像到剪贴板 
		SetClipboardData (CF_DIB, pDoc->GetDibImage()-> 
			CopyHandle((HANDLE) pDoc->GetHDIB()) ); 
 
		CloseClipboard(); 
		EndWaitCursor(); 
	} 
} 
 
void CFreTransView::OnUpdateEditCopy(CCmdUI* pCmdUI)  
{ 
	// 如果当前DIB对象不空，复制菜单项有效 
	pCmdUI->Enable(GetDocument()->GetHDIB() != NULL); 
} 
 
void CFreTransView::OnEditPaste()  
{ 
	// 粘贴图像 
	 
	HDIB hNewDIB = NULL; 
	CFreTransDoc* pDoc = GetDocument(); 
	 
	if (OpenClipboard()) 
	{ 
		BeginWaitCursor(); 
 
		// 读取剪贴板中的图像 
		hNewDIB = (HDIB)pDoc->GetDibImage()->CopyHandle(::GetClipboardData(CF_DIB)); 
 
		CloseClipboard(); 
		 
		if (hNewDIB != NULL) 
		{ 
			pDoc->ReplaceHDIB(hNewDIB);		// 替换DIB，同时释放旧DIB对象		 
			pDoc->InitDIBData();			// 更新DIB大小和调色板		 
			pDoc->SetModifiedFlag(TRUE);	// 设置脏标记	 
			SetScrollSizes(MM_TEXT, pDoc->GetDocSize());	// 重新设置滚动视图大小		 
			OnDoRealize((WPARAM)m_hWnd,0);	// 实现新的调色板		 
			pDoc->UpdateAllViews(NULL);		// 更新视图 
		} 
 
		EndWaitCursor(); 
	} 
} 
 
void CFreTransView::OnUpdateEditPaste(CCmdUI* pCmdUI)  
{ 
	// 如果当前剪贴板中有DIB对象，粘贴菜单项有效 
	pCmdUI->Enable(::IsClipboardFormatAvailable(CF_DIB)); 
} 
 
LRESULT CFreTransView::OnDoRealize(WPARAM wParam, LPARAM) 
{ 
	ASSERT(wParam != NULL); 
 
	CFreTransDoc* pDoc = GetDocument();	 
	if (pDoc->GetHDIB() == NULL) 
	{ 
		return 0L; 
	} 
	 
	CPalette* pPal = pDoc->GetDocPalette(); 
	if (pPal != NULL) 
	{ 
		CMainFrame* pAppFrame = (CMainFrame*) AfxGetApp()->m_pMainWnd; 
		ASSERT_KINDOF(CMainFrame, pAppFrame); 
		 
		CClientDC appDC(pAppFrame); 
 
		// All views but one should be a background palette. 
		// wParam contains a handle to the active view, so the SelectPalette 
		// bForceBackground flag is FALSE only if wParam == m_hWnd (this view) 
		CPalette* oldPalette = appDC.SelectPalette(pPal,((HWND)wParam)!=m_hWnd);	 
		if (oldPalette != NULL) 
		{ 
			UINT nColorsChanged = appDC.RealizePalette(); 
			if (nColorsChanged > 0) 
			{ 
				pDoc->UpdateAllViews(NULL); 
			} 
			appDC.SelectPalette(oldPalette, TRUE); 
		} 
		else 
		{ 
			TRACE0("\tCCh1_1View::OnPaletteChanged中调用SelectPalette()失败！\n"); 
		} 
	} 
	 
	return 0L; 
} 
 
void CFreTransView::OnActivateView(BOOL bActivate, CView* pActivateView, CView* pDeactiveView)  
{ 
	CScrollView::OnActivateView(bActivate, pActivateView, pDeactiveView); 
 
	if (bActivate) 
	{ 
		ASSERT(pActivateView == this); 
		OnDoRealize((WPARAM)m_hWnd, 0);   // same as SendMessage(WM_DOREALIZE); 
	} 
} 
 
void CFreTransView::CalcWindowRect(LPRECT lpClientRect, UINT nAdjustType)  
{ 
	CScrollView::OnInitialUpdate(); 
	ASSERT(GetDocument() != NULL); 
	 
	SetScrollSizes(MM_TEXT, GetDocument()->GetDocSize()); 
} 
 
void CFreTransView::OnFreqDct()  
{ 
	// 图像离散余弦变换 
	 
	CFreTransDoc* pDoc = GetDocument(); 
		 
	LPSTR	lpDIB;				// 指向DIB的指针	 
	LPSTR    lpDIBBits;			// 指向DIB象素指针 
	lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) pDoc->GetHDIB()); 
	 
	// 找到DIB图像象素起始位置 
	lpDIBBits = pDoc->GetDibImage()->FindDIBBits(lpDIB); 
	 
	// 判断是否是8-bpp位图（这里为了方便，只处理8-bpp位图的离散余弦变换，其它的可以类推） 
	if (pDoc->GetDibImage()->DIBNumColors(lpDIB) != 256) 
	{ 
		MessageBox("目前只支持256色位图的离散余弦变换！", "系统提示" , 
			MB_ICONINFORMATION | MB_OK); 
		::GlobalUnlock((HGLOBAL) pDoc->GetHDIB()); 
 
		return; 
	} 
 
	BeginWaitCursor(); 
	 
	// 调用DIBDct()函数进行离散余弦变换 
	if (pDoc->GetDibImage()->DIBDct(lpDIBBits,pDoc->GetDibImage()->DIBWidth(lpDIB),  
		pDoc->GetDibImage()->DIBHeight(lpDIB))) 
	{		 
		pDoc->SetModifiedFlag(TRUE);		// 设置脏标记		 
		pDoc->UpdateAllViews(NULL);			// 更新视图 
	} 
	else 
	{ 
		MessageBox("分配内存失败！", "系统提示" , MB_ICONINFORMATION | MB_OK); 
	} 
 
	::GlobalUnlock((HGLOBAL) pDoc->GetHDIB()); 
	EndWaitCursor(); 
} 
 
void CFreTransView::OnFreqFour()  
{ 
	// 图像付立叶变换 
	 
	CFreTransDoc* pDoc = GetDocument(); 
		 
	LPSTR	lpDIB;				// 指向DIB的指针	 
	LPSTR    lpDIBBits;			// 指向DIB象素指针 
	lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) pDoc->GetHDIB()); 
	 
	// 找到DIB图像象素起始位置 
	lpDIBBits = pDoc->GetDibImage()->FindDIBBits(lpDIB); 
	 
	// 判断是否是8-bpp位图（这里为了方便，只处理8-bpp位图的付立叶变换，其它的可以类推） 
	if (pDoc->GetDibImage()->DIBNumColors(lpDIB) != 256) 
	{ 
		MessageBox("目前只支持256色位图的付立叶变换！", "系统提示" , 
			MB_ICONINFORMATION | MB_OK); 
		::GlobalUnlock((HGLOBAL) pDoc->GetHDIB()); 
 
		return; 
	} 
	 
	BeginWaitCursor(); 
	 
	// 调用Fourier()函数进行付立叶变换 
	if (pDoc->GetDibImage()->Fourier(lpDIBBits,pDoc->GetDibImage()->DIBWidth(lpDIB),  
		pDoc->GetDibImage()->DIBHeight(lpDIB))) 
	{ 
		pDoc->SetModifiedFlag(TRUE);		// 设置脏标记		 
		pDoc->UpdateAllViews(NULL);			// 更新视图 
	} 
	else 
	{ 
		MessageBox("分配内存失败！", "系统提示" , MB_ICONINFORMATION | MB_OK); 
	} 
	 
	::GlobalUnlock((HGLOBAL) pDoc->GetHDIB()); 
	EndWaitCursor(); 
} 
 
void CFreTransView::OnFreqWalh()  
{ 
	// 图像沃尔什-哈达玛变换 
 
	CFreTransDoc* pDoc = GetDocument(); 
		 
	LPSTR	lpDIB;				// 指向DIB的指针	 
	LPSTR    lpDIBBits;			// 指向DIB象素指针 
	lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) pDoc->GetHDIB()); 
	 
	// 找到DIB图像象素起始位置 
	lpDIBBits = pDoc->GetDibImage()->FindDIBBits(lpDIB); 
	 
	// 判断是否是8-bpp位图（这里为了方便，只处理8-bpp位图的沃尔什-哈达玛变换， 
	// 其它的可以类推） 
	if (pDoc->GetDibImage()->DIBNumColors(lpDIB) != 256) 
	{ 
		MessageBox("目前只支持256色位图的沃尔什-哈达玛变换！", "系统提示" , 
			MB_ICONINFORMATION | MB_OK); 
		::GlobalUnlock((HGLOBAL) pDoc->GetHDIB()); 
 
		return; 
	} 
	 
	BeginWaitCursor(); 
	 
	// 调用DIBWalsh()或者DIBWalsh1()函数进行变换 
	if (pDoc->GetDibImage()->DIBWalsh1(lpDIBBits,pDoc->GetDibImage()->DIBWidth(lpDIB),  
		pDoc->GetDibImage()->DIBHeight(lpDIB))) 
	{ 
		pDoc->SetModifiedFlag(TRUE);		// 设置脏标记		 
		pDoc->UpdateAllViews(NULL);			// 更新视图 
	} 
	else 
	{ 
		MessageBox("分配内存失败！", "系统提示" , MB_ICONINFORMATION | MB_OK); 
	} 
 
	::GlobalUnlock((HGLOBAL) pDoc->GetHDIB()); 
	EndWaitCursor(); 
}