VC 文字处理
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//实现插入符打字,退格回车的思路。用的是TextOut 和DrawText设定的矩形会将字体截断,可以结合Timer实现LRC字幕的变化效果。
CClientDC dc(this); if(nChar ==0x0D) { m_cposCaret.x =0; m_cposCaret.y += m_cszCharacter.cy; SetCaretPos(m_cposCaret); m_cstrText.Empty(); } else if(nChar == 0x08) { COLORREF color = dc.SetTextColor(dc.GetBkColor()); dc.TextOut(m_cposCaret.x,m_cposCaret.y,m_cstrText); m_cstrText = m_cstrText.Left(m_cstrText.GetLength() -1); CPoint posCaret; posCaret.x =m_cposCaret.x + dc.GetTextExtent(m_cstrText).cx; posCaret.y = m_cposCaret.y; SetCaretPos(posCaret); dc.SetTextColor(color ); dc.TextOut(m_cposCaret.x,m_cposCaret.y,m_cstrText); } else { m_cstrText += nChar; CPoint posCaret; posCaret.x =m_cposCaret.x + dc.GetTextExtent(m_cstrText).cx; posCaret.y = m_cposCaret.y; SetCaretPos(posCaret); dc.TextOut(m_cposCaret.x,m_cposCaret.y,m_cstrText); }