clouddoc.cpp

这是书上的代码

// CloudDoc.cpp : implementation of the CCloudDoc class
//

#include "stdafx.h"
#include "Cloud.h"
#include "CloudDoc.h"

#include "math.h"

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

/////////////////////////////////////////////////////////////////////////////
// CCloudDoc

IMPLEMENT_DYNCREATE(CCloudDoc, CDocument)

BEGIN_MESSAGE_MAP(CCloudDoc, CDocument)
	//{{AFX_MSG_MAP(CCloudDoc)
	ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
	ON_COMMAND(ID_CHANGE_BRIGHTNESS, OnChangeBrightness)
	ON_COMMAND(ID_CLOSE_FILE, OnCloseFile)
	ON_COMMAND(ID_GRAY_STRETCH, OnGrayStretch)
	ON_COMMAND(ID_CHANGE_GRAY, OnChangeGray)
	ON_COMMAND(ID_HISTOGRAM_EQUALIZE, OnHistogramEqualize)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCloudDoc construction/destruction

CCloudDoc::CCloudDoc()
{

	m_Dib=NULL;


}

CCloudDoc::~CCloudDoc()
{

	m_Dib=NULL;


}

BOOL CCloudDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)

	return TRUE;
}



/////////////////////////////////////////////////////////////////////////////
// CCloudDoc serialization

void CCloudDoc::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
		// TODO: add storing code here
	}
	else
	{
		// TODO: add loading code here
	}
}

/////////////////////////////////////////////////////////////////////////////
// CCloudDoc diagnostics

#ifdef _DEBUG
void CCloudDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void CCloudDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CCloudDoc commands

void CCloudDoc::OnFileOpen() 
{	
	CString FileName;
	char szFilters[]=
      "MyType Files (*.bmp)|*.bmp|jpeg (*.jpg)|*.jpg|All Files (*.*)|*.*||";
	
	CFileDialog fileDlg (TRUE, "bmp", "*.bmp",
      OFN_FILEMUSTEXIST|OFN_HIDEREADONLY, szFilters, NULL);
	CDib* t_Dib=NULL;

	if(fileDlg.DoModal()==IDOK)
	{
		FileName=fileDlg.GetPathName();
		if(m_Dib)
		{
			CDib* t_Dib=m_Dib;
		}
		
		m_Dib=new CDib();
		delete t_Dib;
		LPSTR lpfileName=(LPSTR)((LPCSTR)FileName);
		m_Dib->LoadDIB(lpfileName);
		UpdateAllViews(NULL);
		
		
	}
}


void CCloudDoc::OnChangeBrightness() 
{
	if(m_Dib)
	{
		int bitCount=m_Dib->bmpInfo->bmiHeader.biBitCount;
		if(bitCount<24)
		{
			AfxMessageBox("只能改变真彩色图像");
			return;
		}
		m_Dib->OnChangeBrightness(1,30.0);
		UpdateAllViews(NULL);
	}	
	
}

void CCloudDoc::OnCloseFile() 
{
	UpdateAllViews(NULL);	
}

void CCloudDoc::OnGrayStretch() 
{
	if(m_Dib)
	{
		int bitCount=m_Dib->bmpInfo->bmiHeader.biBitCount;
		if(bitCount<24)
		{
			AfxMessageBox("只能改变真彩色图像");
			return;
		}
    	m_Dib->OnGrayStretch(20,200,0,230);
		UpdateAllViews(NULL);
	}	
	
}

void CCloudDoc::OnChangeGray() 
{
	if(m_Dib)
	{
		int bitCount=m_Dib->bmpInfo->bmiHeader.biBitCount;
		if(bitCount<24)
		{
			AfxMessageBox("只能改变真彩色图像");
			return;
		}
		m_Dib->OnChangeToGray();
		UpdateAllViews(NULL);
	}	
	
}

void CCloudDoc::OnHistogramEqualize() 
{
	if(m_Dib)
	{
		int bitCount=m_Dib->bmpInfo->bmiHeader.biBitCount;
		if(bitCount<24)
		{
			AfxMessageBox("只能改变真彩色图像");
			return;
		}
		m_Dib->OnHistogramEqualize();
		UpdateAllViews(NULL);
	}	
	
}