Advanced MFC Programming

Chapter 9. Font
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void CGDIDoc::SetCaret(CPoint point)
{
}
if(m_nSelIndexBgn == -1)m_nSelIndexBgn=m_nCaretIndex;
else
{
m_nSelIndexEndOld=m_nSelIndexEnd;
m_nSelIndexEnd=m_nCaretIndex;
UpdateAllViews(NULL, HINT_SELECTION);
}
GetCGDIView()->RedrawCaret();
In this function, the value of m_nSelIndexEnd is first assigned to m_nSelIndexEndOld before it is
updated. Flag HINT_SELECTION will cause the difference between the newly selected area and the old one to
be updated. The area can be calculated from the four selection indices.
The following shows the modifications made to function CGDIDoc::AddChar(…):
Old Version:
……
void CGDIDoc::AddChar(UINT uChar, UINT uRepCnt)
{
}
UpdateAllViews(NULL);
ForwardCaret();
New Version:
……
void CGDIDoc::AddChar(UINT uChar, UINT uRepCnt)
{
}
UpdateAllViews(NULL, HINT_INPUT);
ForwardCaret();
Flag HINT_INPUT will cause all the characters after the caret to be updated.
The following shows the modifications made to funciton CGDIDoc::DeleteChar(…):
Old Version:
……
……
……
void CGDIDoc::DeleteChar(BOOL bBefore)
{
}
if(bBefore == TRUE)
{
}
}
else
{
}
}
UpdateAllViews(NULL);
BackwardCaret();
m_szText+=szStr;
UpdateAllViews(NULL);
New Version:
void CGDIDoc::DeleteChar(BOOL bBefore)
{
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