example13-1.htm

Visual C++面向对象程序设计教程（配套习题资源）

        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">for 
        (i = 0 ; i &lt; (int) LOWORD (lParam) ; i++)</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">switch 
        (wParam)</font></p>
        <blockquote>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">case 
          '\b' : // BACKSPACE<font FACE="??ì?,SimSun" LANG="ZH-CN">键</font></font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">if 
          (xCaret &gt; 0)</font></p>
          <blockquote>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">xCaret-- 
            ;</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">SendMessage 
            (hwnd, WM_KEYDOWN,</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">VK_DELETE, 
            1L) ;</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
          </blockquote>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">break 
          ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 5; margin-bottom: 0"><font size="2">case 
          '\t' : // Tab<font FACE="??ì?,SimSun" LANG="ZH-CN">键</font></font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">do</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">SendMessage 
          (hwnd, WM_CHAR, ' ', 1L) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">while 
          (xCaret % 8 != 0) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">break 
          ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 5; margin-bottom: 0"><font size="2">case 
          '\n' : // <font FACE="??ì?,SimSun" LANG="ZH-CN">换行</font></font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">if 
          (++yCaret == cyBuffer)</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">yCaret 
          = 0 ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">break 
          ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 5; margin-bottom: 0"><font size="2">case 
          '\r' : // <font FACE="??ì?,SimSun" LANG="ZH-CN">回车</font></font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">xCaret 
          = 0 ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">if 
          (++yCaret == cyBuffer)</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">yCaret 
          = 0 ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">break 
          ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 5; margin-bottom: 0"><font size="2">case 
          '\x1B' : // Escape<font FACE="??ì?,SimSun" LANG="ZH-CN">键</font></font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">for 
          (y = 0 ; y &lt; cyBuffer ; y++)</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">for 
          (x = 0 ; x &lt; cxBuffer ; x++)</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">BUFFER 
          (x, y) = ' ' ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">xCaret 
          = 0 ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">yCaret 
          = 0 ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">InvalidateRect 
          (hwnd, NULL, FALSE) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">break 
          ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 5; margin-bottom: 0"><font size="2">default 
          : // <font FACE="??ì?,SimSun" LANG="ZH-CN">字符代码</font></font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">BUFFER 
          (xCaret, yCaret) = (char) wParam ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">HideCaret 
          (hwnd) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">hdc 
          = GetDC (hwnd) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">SelectObject 
          (hdc,</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">GetStockObject 
          (SYSTEM_FIXED_FONT)) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">TextOut 
          (hdc, xCaret * cxChar, yCaret * cyChar,</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">&amp; 
          BUFFER (xCaret, yCaret), 1) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">ShowCaret 
          (hwnd) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">ReleaseDC 
          (hwnd, hdc) ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">if 
          (++xCaret == cxBuffer)</font></p>
          <blockquote>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">xCaret 
            = 0 ;</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">if 
            (++yCaret == cyBuffer)</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">yCaret 
            = 0 ;</font></p>
            <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
          </blockquote>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">break 
          ;</font></p>
          <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
        </blockquote>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">SetCaretPos 
        (xCaret * cxChar, yCaret * cyChar) ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">return 
        0 ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0">　</p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">case 
        WM_PAINT :</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">hdc 
        = BeginPaint (hwnd, &amp;ps) ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">SelectObject 
        (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">for 
        (y = 0 ; y &lt; cyBuffer ; y++)</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">TextOut 
        (hdc, 0, y * cyChar, &amp; BUFFER(0,y), cxBuffer) ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">EndPaint 
        (hwnd, &amp;ps) ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">return 
        0 ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0">　</p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">case 
        WM_DESTROY :</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">PostQuitMessage 
        (0) ;</font></p>
        <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">return 
        0 ;</font></p>
      </blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">return 
      DefWindowProc (hwnd, iMsg, wParam, lParam) ;</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
  </blockquote>
</blockquote>

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