viewerview.cpp

这是书上的代码

// ViewerView.cpp : CViewerView 类的实现
//

#include "stdafx.h"
#include "Viewer.h"

#include "ViewerDoc.h"
#include "ViewerView.h"


#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CViewerView

IMPLEMENT_DYNCREATE(CViewerView, CScrollView)

BEGIN_MESSAGE_MAP(CViewerView, CScrollView)
	// 标准打印命令
	ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CScrollView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview)
	ON_COMMAND(ID_FORMAT_TXTFONT, OnFormatTxtfont)
	ON_COMMAND(ID_FORMAT_TXTCOLOR, OnFormatTxtcolor)
	ON_UPDATE_COMMAND_UI(ID_STAT_TXTFONT, OnUpdateStatTxtfont)
	ON_UPDATE_COMMAND_UI(ID_STAT_TXTCOLOR, OnUpdateStatTxtcolor)
	ON_COMMAND(ID_FORMAT_SET, OnFormatSet)
	ON_WM_ERASEBKGND()
END_MESSAGE_MAP()

// CViewerView 构造/销毁

CViewerView::CViewerView()
: m_pSetDlg(NULL)
{
	memset(&m_lfTxtFont, 0, sizeof(LOGFONT));	// 将m_lfTxtFont中的所有成员置0
	m_lfTxtFont.lfHeight = -12;					// 字体高度
	m_lfTxtFont.lfCharSet = GB2312_CHARSET;		// 字符集
	strcpy(m_lfTxtFont.lfFaceName, "宋体");		// 字样名

	m_crTxtColor = RGB( 0, 0, 0 );				// 设置初始的颜色为黑色
	m_bkColor = RGB( 255, 255, 255 );			
}

CViewerView::~CViewerView()
{
	if ( m_pSetDlg != NULL )
		delete m_pSetDlg;			// 删除指针，释放空间
}

BOOL CViewerView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: 在此处通过修改 CREATESTRUCT cs 来修改窗口类或
	// 样式

	return CScrollView::PreCreateWindow(cs);
}

// CViewerView 绘制

void CViewerView::OnDraw(CDC* pDC)
{
	CViewerDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	pDC->SetTextColor( m_crTxtColor );			// 设置文本颜色

	CFont font;
	font.CreateFontIndirect( &m_lfTxtFont );	// 由逻辑字体创建字体
	CFont* oldFont = pDC->SelectObject( &font );// 选用新的字体

	DispContent( pDC );

	pDC->SelectObject( oldFont );				// 恢复原来的字体
}

void CViewerView::OnInitialUpdate()
{
	CScrollView::OnInitialUpdate();
	CSize sizeTotal;
	// TODO: 计算此视图的合计大小
	sizeTotal.cx = sizeTotal.cy = 100;
	SetScrollSizes(MM_TEXT, sizeTotal);
}


// CViewerView 打印

BOOL CViewerView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// 默认准备
	return DoPreparePrinting(pInfo);
}

void CViewerView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 打印前添加额外的初始化
}

void CViewerView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 打印后添加清除过程
}


// CViewerView 诊断

#ifdef _DEBUG
void CViewerView::AssertValid() const
{
	CScrollView::AssertValid();
}

void CViewerView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}

CViewerDoc* CViewerView::GetDocument() const // 非调试版本是内联的
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CViewerDoc)));
	return (CViewerDoc*)m_pDocument;
}
#endif //_DEBUG


// CViewerView 消息处理程序

void CViewerView::DispContent(CDC* pDC)
{
	CViewerDoc* pDoc = GetDocument();
	int nLines = (int)pDoc->m_strContent.GetCount();
	if ( nLines < 1) return;

	CSize sizeLine = pDC->GetTextExtent( "A" );	// 获取该字符的宽度和高度
	int nTabChars = 4 * sizeLine.cx;		// 设置一个Tab符等于4个字符

	int y = 0;								// 行的位置
	CString str;
	int nWidthMax = 0;
	
	for (int i=0; i<nLines; i++ )
	{
		str = pDoc->m_strContent.GetAt(i);	// 获取指定行文本字符串
		CSize size = pDC->TabbedTextOut( 0, y, str, 1, &nTabChars, 0);
		y = y + sizeLine.cy;

		if ( nWidthMax < size.cx ) nWidthMax = size.cx;		// 求最大的行宽
	}

	SetScrollSizes(MM_TEXT, CSize( nWidthMax, y));			// 设置滚动逻辑大小
}

void CViewerView::OnFormatTxtfont()
{
	// TODO: 在此添加命令处理程序代码
	CFontDialog dlg( &m_lfTxtFont );
	if ( dlg.DoModal() == IDOK )			// 若用户按“确定”按钮
	{
		dlg.GetCurrentFont( &m_lfTxtFont );	// 获得用户选择的逻辑字体
		Invalidate();						// 强制调用OnDraw()
	}
}

void CViewerView::OnFormatTxtcolor()
{
	// TODO: 在此添加命令处理程序代码
	CColorDialog dlg( m_crTxtColor );
	if ( dlg.DoModal() == IDOK )			// 若用户按“确定”按钮
	{
		m_crTxtColor = dlg.GetColor();		// 获得用户选择的颜色
		Invalidate();						// 强制调用OnDraw()
	}
}

void CViewerView::OnUpdateStatTxtfont(CCmdUI *pCmdUI)
{
	pCmdUI->Enable( );
	CString str;
	str.Format( "%s,%d", m_lfTxtFont.lfFaceName, m_lfTxtFont.lfHeight ); 
	pCmdUI->SetText( str );
}

void CViewerView::OnUpdateStatTxtcolor(CCmdUI *pCmdUI)
{
	pCmdUI->Enable( );
	CString str;
	str.Format( "颜色：%06X", m_crTxtColor ); 
	pCmdUI->SetText( str );
}

void CViewerView::OnFormatSet()
{
	CSetDlg dlg;
	dlg.m_txtColor = m_crTxtColor;
	dlg.m_txtLogfont = m_lfTxtFont;
	dlg.m_bkColor = m_bkColor;
	if ( dlg.DoModal() == IDOK )
	{
		m_bkColor = dlg.m_bkColor;
		Invalidate();
	}
}

/*if ( m_pSetDlg != NULL )	
		delete m_pSetDlg;

	m_pSetDlg = new CSetDlg;				// 为指针分配内存空间

	m_pSetDlg->m_txtColor = m_crTxtColor;
	m_pSetDlg->m_txtLogfont = m_lfTxtFont;
	m_pSetDlg->m_bkColor = m_bkColor;

	m_pSetDlg->Create( IDD_DIALOG1 );		// 创建对话框
	m_pSetDlg->ShowWindow( SW_SHOW );		// 显示对话框
	m_pSetDlg->CenterWindow();				// 居中显示对话框}
}*/

BOOL CViewerView::OnEraseBkgnd(CDC* pDC)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	CRect rc;
	pDC->GetClipBox( rc );
	pDC->FillSolidRect( rc, m_bkColor );
	//pDC->SetBkColor( m_bkColor );
	return TRUE;
}

/*
	if (m_pSetDlg != NULL)
	{
		if ( m_pSetDlg->m_bkColor != m_bkColor )
		{
			m_bkColor = m_pSetDlg->m_bkColor;
			Invalidate();
		}
		CRect rc;
		pDC->GetClipBox( rc );
		pDC->FillSolidRect( rc, m_bkColor );
		pDC->SetBkColor( m_bkColor );
		return TRUE;
	}
	else
		return CScrollView::OnEraseBkgnd(pDC);
}
*/