mdicopybitmapview.cpp

VisualC高级编程技术精粹.rar

// MDICopyBitmapView.cpp : implementation of the CMDICopyBitmapView class
//

#include "stdafx.h"
#include "MDICopyBitmap.h"
#include "MDICopyBitmapDoc.h"
#include "MDICopyBitmapView.h"
#include "MainFrm.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMDICopyBitmapView

IMPLEMENT_DYNCREATE(CMDICopyBitmapView, CScrollView)

BEGIN_MESSAGE_MAP(CMDICopyBitmapView, CScrollView)
	//{{AFX_MSG_MAP(CMDICopyBitmapView)
	ON_MESSAGE(WM_REALIZEPAL, OnRealizePal)
	ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
	ON_COMMAND(ID_EDIT_PASTE, OnEditPaste)
	ON_UPDATE_COMMAND_UI(ID_EDIT_COPY, OnUpdateEditCopy)
	ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateEditPaste)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMDICopyBitmapView construction/destruction

CMDICopyBitmapView::CMDICopyBitmapView()
{
	// TODO: add construction code here

}

CMDICopyBitmapView::~CMDICopyBitmapView()
{
}

BOOL CMDICopyBitmapView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMDICopyBitmapView drawing

void CMDICopyBitmapView::OnDraw(CDC* pDC)
{
	CMDICopyBitmapDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here

	HDIB hDIB = pDoc->GetHDIB();
	if (hDIB != NULL)
	{
		LPSTR lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) hDIB);
		int cxDIB = (int) ::DIBWidth(lpDIB);         // Size of DIB - x
		int cyDIB = (int) ::DIBHeight(lpDIB);        // Size of DIB - y
		::GlobalUnlock((HGLOBAL) hDIB);
		CRect rcDIB;
		rcDIB.top = rcDIB.left = 0;
		rcDIB.right = cxDIB;
		rcDIB.bottom = cyDIB;
		CRect rcDest;
		if (pDC->IsPrinting())   // printer DC
		{
			// get size of printer page (in pixels)
			int cxPage = pDC->GetDeviceCaps(HORZRES);
			int cyPage = pDC->GetDeviceCaps(VERTRES);
			// get printer pixels per inch
			int cxInch = pDC->GetDeviceCaps(LOGPIXELSX);
			int cyInch = pDC->GetDeviceCaps(LOGPIXELSY);

			rcDest.top = rcDest.left = 0;
			rcDest.bottom = (int)(((double)cyDIB * cxPage * cyInch)
					/ ((double)cxDIB * cxInch));
			rcDest.right = cxPage;
		}
		else   // not printer DC
		{
			rcDest = rcDIB;
		}
		::PaintDIB(pDC->m_hDC, &rcDest, pDoc->GetHDIB(),
			&rcDIB, pDoc->GetDocPalette());
	}

	pDC->SetBkColor(RGB(0,255,0));
	pDC->TextOut(0, 
		         0, 
				 _T("使用说明：打开一个图像，使用“编辑”菜单中的“复制”和“粘贴”对图像进行操作!"));
}


/////////////////////////////////////////////////////////////////////////////
// CMDICopyBitmapView printing

BOOL CMDICopyBitmapView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CMDICopyBitmapView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CMDICopyBitmapView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CMDICopyBitmapView diagnostics

#ifdef _DEBUG
void CMDICopyBitmapView::AssertValid() const
{
	CView::AssertValid();
}

void CMDICopyBitmapView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CMDICopyBitmapDoc* CMDICopyBitmapView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMDICopyBitmapDoc)));
	return (CMDICopyBitmapDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMDICopyBitmapView message handlers

void CMDICopyBitmapView::OnInitialUpdate() 
{
	CScrollView::OnInitialUpdate();
	
	// TODO: Add your specialized code here and/or call the base class
	CSize sizeTotal;
	sizeTotal.cx = sizeTotal.cy = 3000;
	CSize sizeLine = CSize(sizeTotal.cx / 5,sizeTotal.cy / 5);
	SetScrollSizes(MM_TEXT, sizeLine,sizeTotal,sizeTotal);	
}

LRESULT CMDICopyBitmapView::OnRealizePal (WPARAM wParam,LPARAM lParam)
{
	ASSERT(wParam != NULL);
	CMDICopyBitmapDoc* pDoc = GetDocument();
	if (pDoc->GetHDIB() == NULL)
		return 0L;  // must be a new document必须是一个新的文档
	CPalette* pPal = pDoc->GetDocPalette();
	if (pPal != NULL)
	{
		CMainFrame* pAppFrame = (CMainFrame*) AfxGetApp()->m_pMainWnd;
		ASSERT_KINDOF(CMainFrame, pAppFrame);
	
		CClientDC appDC(pAppFrame);
		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("\tSelectPalette failed in CMDICopyBitmapView::OnPaletteChanged\n");
		}
	}

		return 0L;
}

void CMDICopyBitmapView::OnEditCopy() 
{
	// TODO: Add your command handler code here
	CMDICopyBitmapDoc* pDoc = GetDocument();

	// 清除剪切板的内容，拷贝DIB。
	if (OpenClipboard())
	{
		BeginWaitCursor();
		EmptyClipboard();
		SetClipboardData (CF_DIB, CopyHandle((HANDLE) pDoc->GetHDIB()) );
		CloseClipboard();
		EndWaitCursor();
	}
}

void CMDICopyBitmapView::OnUpdateEditCopy(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(GetDocument()->GetHDIB() != NULL);
}

void CMDICopyBitmapView::OnUpdateEditPaste(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(::IsClipboardFormatAvailable(CF_DIB));
}

void CMDICopyBitmapView::OnEditPaste() 
{
	// TODO: Add your command handler code here
	HDIB hNewDIB = NULL;

	if (OpenClipboard())
	{
		BeginWaitCursor();
		hNewDIB = (HDIB) CopyHandle(::GetClipboardData(CF_DIB));
		CloseClipboard();
		if (hNewDIB != NULL)
		{
			CMDICopyBitmapDoc* pDoc = GetDocument();
			pDoc->ReplaceHDIB(hNewDIB); // 释放旧的DIB
			pDoc->InitDIBData();    // 建立新的调色板及尺寸
			pDoc->SetModifiedFlag(TRUE);

			SetScrollSizes(MM_TEXT, pDoc->GetDocSize());
			OnRealizePal((WPARAM)m_hWnd,0);  // 实现新的调色板
			pDoc->UpdateAllViews(NULL);
		}

		EndWaitCursor();
	}
	
}