simpleeditview.cpp

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// SimpleEditView.cpp : implementation of the CSimpleEditView class
//

#include "stdafx.h"
#include "SimpleEdit.h"

#include "SimpleEditDoc.h"
#include "SimpleEditView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CSimpleEditView

IMPLEMENT_DYNCREATE(CSimpleEditView, CEditView)

BEGIN_MESSAGE_MAP(CSimpleEditView, CEditView)
	//{{AFX_MSG_MAP(CSimpleEditView)
	ON_COMMAND(ID_FILE_SAVE, OnFileSave)
	ON_COMMAND(ID_FILE_SAVE_AS, OnFileSaveAs)
	ON_COMMAND(ID_FORMAT_FONT, OnFormatFont)
	ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
	ON_COMMAND(ID_EDIT_UNDO, OnEditUndo)
	ON_WM_TIMER()
	ON_WM_CREATE()
	ON_WM_DESTROY()
	ON_WM_CHAR()
	ON_UPDATE_COMMAND_UI(ID_EDIT_UNDO, OnUpdateEditUndo)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CEditView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CEditView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CEditView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSimpleEditView construction/destruction

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

}

CSimpleEditView::~CSimpleEditView()
{
}

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

	BOOL bPreCreated = CEditView::PreCreateWindow(cs);
	cs.style &= ~(ES_AUTOHSCROLL|WS_HSCROLL);	// Enable word-wrapping

	return bPreCreated;
}

/////////////////////////////////////////////////////////////////////////////
// CSimpleEditView drawing

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

/////////////////////////////////////////////////////////////////////////////
// CSimpleEditView printing

BOOL CSimpleEditView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default CEditView preparation
	return CEditView::OnPreparePrinting(pInfo);
}

void CSimpleEditView::OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo)
{
	// Default CEditView begin printing.
	CEditView::OnBeginPrinting(pDC, pInfo);
}

void CSimpleEditView::OnEndPrinting(CDC* pDC, CPrintInfo* pInfo)
{
	// Default CEditView end printing
	CEditView::OnEndPrinting(pDC, pInfo);
}

/////////////////////////////////////////////////////////////////////////////
// CSimpleEditView diagnostics

#ifdef _DEBUG
void CSimpleEditView::AssertValid() const
{
	CEditView::AssertValid();
}

void CSimpleEditView::Dump(CDumpContext& dc) const
{
	CEditView::Dump(dc);
}

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

/////////////////////////////////////////////////////////////////////////////
// CSimpleEditView message handlers

void CSimpleEditView::OnFileSave() 
{
	CDocument * pDoc = GetDocument();
	//如果文档没有被保存过，弹出保存对话框
	if (pDoc->GetPathName() == "")
	{
		//定义打开对话框支持的扩展名
		char szFilters[]= "Text Files (*.wzy)|*.wzy|All Files (*.*)|*.*||";

		//初始化打开对话框
		CFileDialog fileDlg (FALSE, "wzy", NULL, OFN_FILEMUSTEXIST| OFN_OVERWRITEPROMPT, szFilters, this);
   
		//显示打开对话框，如果用户点击了确定按钮，打开文档
		if( fileDlg.DoModal()==IDOK )
		{
			//设置文档的路径
			pDoc->SetPathName(fileDlg.GetFileName());
			//使用保存对话框中得到的文件名进行保存
			pDoc->OnSaveDocument(fileDlg.GetFileName());
		}
	}
	else
	{
		//使用文档路径进行保存
		pDoc->OnSaveDocument(pDoc->GetPathName());
	}
}

void CSimpleEditView::OnFileSaveAs() 
{
	CDocument * pDoc = GetDocument();
	
	//定义打开对话框支持的扩展名
	char szFilters[]= "Text Files (*.wzy)|*.wzy|All Files (*.*)|*.*||";

	//初始化打开对话框
	CFileDialog fileDlg (FALSE, "wzy", NULL, OFN_FILEMUSTEXIST| OFN_OVERWRITEPROMPT, szFilters, this);
   
	//显示打开对话框，如果用户点击了确定按钮，打开文档
	if( fileDlg.DoModal()==IDOK )
	{
		//设置文档的路径
		pDoc->SetPathName(fileDlg.GetFileName());
		//使用保存对话框中得到的文件名进行保存
		pDoc->OnSaveDocument(fileDlg.GetFileName());
	}
}

void CSimpleEditView::OnFormatFont() 
{
	LOGFONT lf;

	//得到当前使用的字体
	CFont *font = GetEditCtrl().GetFont(); 

	//当前无字体，创建默认的字体
	if(font==NULL)	
	{
		font =new CFont;
		font->CreatePointFont(120,"Fixedsys");
		font->GetLogFont(&lf);
		delete font;
	}
	else
	{
		font->GetLogFont(&lf);
	}

	//记录修改前的字体
	LOGFONT lf_Temp;
	lf_Temp.lfHeight = lf.lfHeight;
	lf_Temp.lfWidth = lf.lfWidth;
	lf_Temp.lfEscapement = lf.lfEscapement;
	lf_Temp.lfOrientation = lf.lfOrientation;
	lf_Temp.lfWeight = lf.lfWeight;
	lf_Temp.lfItalic = lf.lfItalic;
	lf_Temp.lfUnderline = lf.lfUnderline;
	lf_Temp.lfStrikeOut = lf.lfStrikeOut;
	lf_Temp.lfCharSet = lf.lfCharSet;
	lf_Temp.lfOutPrecision = lf.lfOutPrecision;
	lf_Temp.lfClipPrecision = lf.lfClipPrecision;
	lf_Temp.lfQuality = lf.lfQuality;
	lf_Temp.lfPitchAndFamily = lf.lfPitchAndFamily;
	strcpy(lf_Temp.lfFaceName, lf.lfFaceName);

	CUndoItem ui;
	ui.LB = 1;
	ui.lpData = &lf_Temp;

	//使用当前字体初始化字体对话框
	CFontDialog cf(&lf);
	//如果用户点击了确定，则根据用户输入的字体设置当前字体。
	if(cf.DoModal()==IDOK)
	{
		m_Font.DeleteObject();
		m_Font.CreateFontIndirect(&lf);
		SetFont(&m_Font);
		
		//将修改前的字体压栈。
		m_UndoStack.Push(&ui);	
	}
}

void CSimpleEditView::OnFileOpen() 
{
	//得到文档指针
	CDocument * pDoc = GetDocument();
	//定义打开对话框支持的扩展名
	char szFilters[]= "Text Files (*.wzy)|*.wzy|All Files (*.*)|*.*||";

	//初始化打开对话框
	CFileDialog fileDlg (TRUE, "wzy", NULL, OFN_FILEMUSTEXIST| OFN_HIDEREADONLY, szFilters, this);
   
	//显示打开对话框，如果用户点击了确定按钮，打开文档
	if( fileDlg.DoModal()==IDOK )
	{
		//打开之后需重设文档路径
		pDoc->SetPathName(fileDlg.GetFileName());
		//打开
		pDoc->OnOpenDocument(fileDlg.GetFileName());

		//清空m_UndoStack
		m_UndoStack.Clear();
		//重置m_PreText
		GetWindowText(m_PreText);
	}	
}

void CSimpleEditView::OnEditUndo() 
{
	CUndoItem ui;
	ui.lpData = NULL;
	if (m_UndoStack.Pop(&ui))
	{
		//恢复文本
		if (ui.LB == 0)
		{
			SetWindowText(LPTSTR(ui.lpData));
		}
		//恢复字体
		else if (ui.LB == 1)
		{
			m_Font.DeleteObject();
			m_Font.CreateFontIndirect((LOGFONT *)(ui.lpData));
			SetFont(&m_Font);	
			delete ui.lpData;
		}
		if (m_UndoStack.IsEmpty())
			GetWindowText(m_PreText);
	}
}

void CSimpleEditView::OnTimer(UINT nIDEvent) 
{
	//只用m_IsChanged为true，即有改变发生才执行压栈
	if ((nIDEvent == ID_TIMER_PUSHUNDO) && m_IsChanged)
	{
		//将m_PreText中的字符串压入堆栈。
		CUndoItem ui;
		ui.LB = 0;
		ui.lpData = m_PreText.GetBuffer(m_PreText.GetLength());
		m_UndoStack.Push(&ui);
		m_PreText.ReleaseBuffer();
		//重置m_PreText和m_IsChanged
		GetWindowText(m_PreText);
		m_IsChanged = false;
	}
	
	CEditView::OnTimer(nIDEvent);
}

int CSimpleEditView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CEditView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	SetTimer(ID_TIMER_PUSHUNDO, 500, NULL);
	
	m_IsChanged = false;

	m_PreText = "";

	return 0;
}

void CSimpleEditView::OnDestroy() 
{
	CEditView::OnDestroy();
	
	KillTimer(ID_TIMER_PUSHUNDO);	
}

void CSimpleEditView::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	m_IsChanged = true;

	CEditView::OnChar(nChar, nRepCnt, nFlags);
}

void CSimpleEditView::OnUpdateEditUndo(CCmdUI* pCmdUI) 
{
	if (m_UndoStack.IsEmpty())
		pCmdUI->Enable(FALSE);
	else
		pCmdUI->Enable(TRUE);
}