MFC简单字处理程序关键代码

// TextView.cpp : implementation of the CTextView class
//

#include "stdafx.h"
#include "Text.h"

#include "TextDoc.h"
#include "TextView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTextView

IMPLEMENT_DYNCREATE(CTextView, CView)

BEGIN_MESSAGE_MAP(CTextView, CView)
    //{{AFX_MSG_MAP(CTextView)
    ON_WM_CREATE()
    ON_WM_CHAR()
    ON_WM_LBUTTONDOWN()
    ON_WM_TIMER()
    //}}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()

/////////////////////////////////////////////////////////////////////////////
// CTextView construction/destruction

CTextView::CTextView()
{
    // TODO: add construction code here
    cs_textStr = "";
    m_CPMouse.x = 0;
    m_CPMouse.y = 0;
    n_Width = 0;

    textId = 0;
    n_TextID_Array[0] = IDS_STRING_TEST;
    n_TextID_Array[1] = IDS_STRING_TEST1;
    n_TextID_Array[2] = IDS_STRING_TEST2;
    n_TextID_Array[3] = IDS_STRING_TEST3;
}

CTextView::~CTextView()
{
}

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

    return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CTextView drawing

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

/////////////////////////////////////////////////////////////////////////////
// CTextView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTextView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CTextView message handlers

int CTextView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CView::OnCreate(lpCreateStruct) == -1)
        return -1;

    // TODO: Add your specialized creation code here
    ///< 创建插入符

    /*光标插入符*/
    /*
    TEXTMETRIC textMetric;
    CClientDC ccdc(this);
    if (!ccdc.GetTextMetrics(&textMetric))
    {
        return -1;
    }
    CreateSolidCaret(textMetric.tmAveCharWidth/8, textMetric.tmHeight);
    ShowCaret();
    */

    /*位图插入符*/
    bitmap.LoadBitmap(IDB_BITMAP_CARATE);
    CreateCaret(&bitmap);
    ShowCaret();

    SetTimer(TIMER_COLOR_IDEVENT, 100, NULL);

    return 0;
}

void CTextView::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    // TODO: Add your message handler code here and/or call default
    TEXTMETRIC textMetric;
    CClientDC ccdc(this);
    if (!ccdc.GetTextMetrics(&textMetric))
    {
        return;
    }

    if (0x0d == nChar)            ///< 换行
    {
        cs_textStr.Empty();
        m_CPMouse.y += textMetric.tmHeight;
    }
    else if (0x08 == nChar)        ///< 退格
    {
        ///< 字体背景涂为白色，返回当前字体颜色
        COLORREF clr = ccdc.SetTextColor(ccdc.GetBkColor());
        ccdc.TextOut(m_CPMouse.x, m_CPMouse.y, cs_textStr);
        ///< 截断字符串
        cs_textStr = cs_textStr.Left(cs_textStr.GetLength() - 1);
        ///< 设置回字体颜色
        ccdc.SetTextColor(clr);
    }
    else
    {
        cs_textStr += nChar;
    }

    /*移动光标*/
    CSize sz = ccdc.GetTextExtent(cs_textStr);
    CPoint cpt;
    cpt.x = m_CPMouse.x + sz.cx;
    cpt.y = m_CPMouse.y;
    SetCaretPos(cpt);

    ccdc.TextOut(m_CPMouse.x, m_CPMouse.y, cs_textStr);

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

void CTextView::OnLButtonDown(UINT nFlags, CPoint point)
{
    // TODO: Add your message handler code here and/or call default

    /*移动光标*/
    SetCaretPos(point);
    /*清空字符缓存*/
    cs_textStr.Empty();
    /*重置光标位置*/
    m_CPMouse = point;

    CView::OnLButtonDown(nFlags, point);
}

void CTextView::OnTimer(UINT nIDEvent)
{
    // TODO: Add your message handler code here and/or call default
    n_Width += 5;

    TEXTMETRIC textMetric;
    CClientDC ccdc(this);
    if (!ccdc.GetTextMetrics(&textMetric))
    {
        return;
    }
    CRect rect;
    rect.left = 0;
    rect.top = 200;
    rect.right = n_Width;
    rect.bottom = rect.top + textMetric.tmHeight;

    ccdc.SetTextColor(RGB(255, 0, 0));
    CString cst;
    cst.LoadString(n_TextID_Array[textId]);
    ccdc.DrawText(cst, &rect, DT_RIGHT);

    CSize sz = ccdc.GetTextExtent(cst);
    if (n_Width > sz.cx)
    {
        ///< 取下一个字符串
        ++textId;
        if (4 == textId)
        {
            textId = 0;
        }

        n_Width = 0;
        ccdc.SetTextColor(RGB(0, 255, 0));
        ccdc.TextOut(0, 200, cst);
    }

    CView::OnTimer(nIDEvent);
}