www.pudn.com > chap_03.rar > DipDoc.cpp

// DipDoc.cpp : implementation of the CDipDoc class 
// 
 
#include "stdafx.h" 
#include "Dip.h" 
 
#include "DipDoc.h" 
#include "MainFrm.h" 
#include "ChildFrm.h" 
#include "DipView.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
//外部变量声明 
extern char szFilter[]; 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipDoc 
 
IMPLEMENT_DYNCREATE(CDipDoc, CDocument) 
 
BEGIN_MESSAGE_MAP(CDipDoc, CDocument) 
	//{{AFX_MSG_MAP(CDipDoc) 
	ON_COMMAND(ID_FILE_NEW, OnFileNew) 
	ON_COMMAND(ID_FILE_OPEN, OnFileOpen) 
	ON_COMMAND(ID_FILE_SAVE_AS, OnFileSaveAs) 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipDoc construction/destruction 
 
CDipDoc::CDipDoc() 
{ 
	m_pDibObject = NULL; 
	m_bImageLoaded = FALSE; 
} 
 
CDipDoc::~CDipDoc() 
{ 
	if(m_pDibObject != NULL) 
	{ 
		delete m_pDibObject; 
		m_pDibObject = NULL; 
	} 
} 
 
BOOL CDipDoc::OnNewDocument() 
{ 
	if (!CDocument::OnNewDocument()) 
		return FALSE; 
 
	// TODO: add reinitialization code here 
	// (SDI documents will reuse this document) 
 
	return TRUE; 
} 
 
 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipDoc serialization 
 
void CDipDoc::Serialize(CArchive& ar) 
{ 
	if (ar.IsStoring()) 
	{ 
		// TODO: add storing code here 
	} 
	else 
	{ 
		// TODO: add loading code here 
	} 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipDoc diagnostics 
 
#ifdef _DEBUG 
void CDipDoc::AssertValid() const 
{ 
	CDocument::AssertValid(); 
} 
 
void CDipDoc::Dump(CDumpContext& dc) const 
{ 
	CDocument::Dump(dc); 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CDipDoc commands 
 
void CDipDoc::OnFileNew()  
{ 
	// TODO: Add your command handler code here 
	 
} 
 
//打开图像文件 
void CDipDoc::OnFileOpen()  
{ 
	static int nIndex = 1; 
	 
	CFileDialog FileDlg( TRUE, NULL, NULL, OFN_HIDEREADONLY, szFilter ); 
	FileDlg.m_ofn.nFilterIndex = (DWORD) nIndex; 
	 
	if( FileDlg.DoModal() == IDOK ) 
	{ 
		CString strPathName = FileDlg.GetPathName(); 
		AfxGetApp()->OpenDocumentFile( strPathName ); 
		nIndex = (int) FileDlg.m_ofn.nFilterIndex; 
		if( !ReadImgToDoc() ) 
		{ 
			AfxMessageBox("无法载入图像文件！"); 
			return; 
		} 
	} 
} 
 
//另存图像文件 
void CDipDoc::OnFileSaveAs()  
{ 
	static int nIndex = 1; 
 
	CFileDialog DialogSaveAs( FALSE, NULL, m_pDibObject->GetImageName(), 
		                      OFN_HIDEREADONLY, szFilter ); 
 
	DialogSaveAs.m_ofn.nFilterIndex = (DWORD) nIndex; 
 
	if( DialogSaveAs.DoModal() == IDOK ) 
	{ 
		CMainFrame *pMainFrame = ( CMainFrame *)AfxGetMainWnd(); 
		CChildFrame *pChildFrame = ( CChildFrame *)pMainFrame->MDIGetActive(); 
		CDipView *pDipView = ( CDipView * )pChildFrame->GetActiveView(); 
		 
		nIndex = (int) DialogSaveAs.m_ofn.nFilterIndex; 
 
		//是JPEG格式图像，判断其是否为24位真彩色图像 
		if( nIndex == 5 ) 
		{ 
			if( m_pDibObject->GetNumBits() != 24 ) 
			{ 
				AfxMessageBox("只有24位真彩色图像才能存为JPEG格式！"); 
				return; 
			} 
		} 
		 
		//CDibObject类中有图像才能保存 
		if( m_pDibObject != NULL ) 
		{ 
			//获取指定的文件名（含路径名） 
			CString strPathName = DialogSaveAs.GetPathName(); 
			int nFindIndex = strPathName.Find("."); 
 
			if( nFindIndex != -1) 
				strPathName = strPathName.Left( nFindIndex ); 
 
			//加上指定的扩展名以构成完整文件名 
			strPathName += CDibObject::szExtensions[ nIndex - 1 ]; 
			//调用CDibObject类成员函数Save()保存图像 
			m_pDibObject->Save( strPathName ); 
			 
			//设置窗口标题 
			CString strFileName = DialogSaveAs.GetFileName(); 
			nFindIndex = strFileName.Find("."); 
 
			if ( nFindIndex != -1 ) 
				strFileName = strFileName.Left( nFindIndex ); 
 
			strFileName += CDibObject::szExtensions[ nIndex - 1 ]; 
			pChildFrame->SetWindowText( strFileName ); 
			 
			SetPathName( strPathName ); 
 
			//若保存为JPEG图像，重新将图像载入并更新视图的显示 
			if( nIndex == 5 ) 
			{ 
				m_pDibObject->Load( strPathName ); 
				pDipView->InvalidateRect( NULL, FALSE ); 
				pDipView->UpdateWindow(); 
			} 
		} 
	} 
} 
 
//将图像文件读入CDibObject类对象中 
BOOL CDipDoc::ReadImgToDoc() 
{ 
	CString strPathName = GetPathName(); 
	 
	//设置等待光标 
	BeginWaitCursor(); 
	m_pDibObject = new CDibObject( strPathName.GetBuffer(3) ); 
	//取消等待光标 
	EndWaitCursor(); 
	 
	//读入图像文件失败 
	if( m_pDibObject == NULL ) 
	{	 
		AfxMessageBox("无法创建图像类对象！"); 
		//返回FALSE 
		return(FALSE); 
	} 
	 
	//读入图像文件成功，设置相应变量 
	m_bImageLoaded = TRUE; 
	 
	//返回TRUE 
	return(TRUE); 
}