/**
* @param bIgnoreScrollPos - pass true to disregard any existing scrollbar styles.
*/
void CTextView::ResizeTextView(BOOL bIgnoreScrollPos)
{
TEXTMETRIC tmetr;
GetTextMetrics(&tmetr);
SCROLLINFO sinfo;
RECT rcClient;
GetClientRect(m_hwnd, &rcClient);
ZeroMemory(&sinfo, sizeof(sinfo));
sinfo.cbSize = sizeof(sinfo);
sinfo.fMask = SIF_POS | SIF_RANGE;
GetScrollInfo(m_hwnd, SB_HORZ, &sinfo);
int nOldHorPos = ! bIgnoreScrollPos ? sinfo.nPos : 0;
sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
sinfo.nMin = 0;
if (sinfo.nMax < m_nMaxLineWidth - 1)
sinfo.nMax = m_nMaxLineWidth - 1;
sinfo.nPage = rcClient.right;
ValidateScrollInfo(&sinfo);
int nHorOffset = nOldHorPos - sinfo.nPos;
SetScrollInfo(m_hwnd, SB_HORZ, &sinfo, TRUE);
GetClientRect(m_hwnd, &rcClient);
ZeroMemory(&sinfo, sizeof(sinfo));
sinfo.cbSize = sizeof(sinfo);
int nOldVertPos;
if (! bIgnoreScrollPos)
{
sinfo.fMask = SIF_POS;
GetScrollInfo(m_hwnd, SB_VERT, &sinfo);
nOldVertPos = sinfo.nPos;
}
else
nOldVertPos = sinfo.nPos = 0;
int nNumLines = m_arrLines.GetCount();
sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
sinfo.nMin = 0;
sinfo.nMax = nNumLines > 0 ? nNumLines - 1 : 0;
sinfo.nPage = rcClient.bottom / tmetr.tmHeight;
ValidateScrollInfo(&sinfo);
int nVertOffset = (nOldVertPos - sinfo.nPos) * tmetr.tmHeight;
SetScrollInfo(m_hwnd, SB_VERT, &sinfo, TRUE);
GetClientRect(m_hwnd, &rcClient);
// Explicitly clip output to override style CS_PARENTDC.
ScrollWindowEx(m_hwnd, nHorOffset, nVertOffset, &rcClient, &rcClient, NULL, NULL, SW_INVALIDATE);
UpdateWindow(m_hwnd);
}
/**
* @param bIgnoreScrollPos - pass true to disregard any existing scrollbar styles.
*/
void CImageView::ResizeImageView(BOOL bIgnoreScrollPos)
{
SCROLLINFO sinfo;
RECT rcClient;
GetClientRect(m_hwnd, &rcClient);
ZeroMemory(&sinfo, sizeof(sinfo));
sinfo.cbSize = sizeof(sinfo);
if (! bIgnoreScrollPos)
{
sinfo.fMask = SIF_POS;
GetScrollInfo(m_hwnd, SB_HORZ, &sinfo);
}
else
sinfo.nPos = 0;
sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
sinfo.nMin = 0;
sinfo.nMax = m_szAjustedBitmapSize.cx > 0 ? m_szAjustedBitmapSize.cx - 1 : 0;
sinfo.nPage = rcClient.right;
ValidateScrollInfo(&sinfo);
SetScrollInfo(m_hwnd, SB_HORZ, &sinfo, TRUE);
GetClientRect(m_hwnd, &rcClient);
ZeroMemory(&sinfo, sizeof(sinfo));
sinfo.cbSize = sizeof(sinfo);
if (! bIgnoreScrollPos)
{
sinfo.fMask = SIF_POS;
GetScrollInfo(m_hwnd, SB_VERT, &sinfo);
}
else
sinfo.nPos = 0;
sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
sinfo.nMin = 0;
sinfo.nMax = m_szAjustedBitmapSize.cy > 0 ? m_szAjustedBitmapSize.cy - 1 : 0;
sinfo.nPage = rcClient.bottom;
ValidateScrollInfo(&sinfo);
SetScrollInfo(m_hwnd, SB_VERT, &sinfo, TRUE);
InvalidateRect(m_hwnd, NULL, FALSE);
}
/**
* @param nScrollBarType - scrollbar type.
* @param nScrollCode - scroll code.
*/
void CTextView::ScrollTextView(int nScrollBarType, int nScrollCode)
{
_ASSERTE(nScrollBarType == SB_HORZ || nScrollBarType == SB_VERT);
SCROLLINFO sinfo;
ZeroMemory(&sinfo, sizeof(sinfo));
sinfo.cbSize = sizeof(sinfo);
sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
if (nScrollCode == SB_THUMBTRACK)
sinfo.fMask |= SIF_TRACKPOS;
GetScrollInfo(m_hwnd, nScrollBarType, &sinfo);
int nOldPos = sinfo.nPos;
TEXTMETRIC tmetr;
GetTextMetrics(&tmetr);
int nLineOffset = nScrollBarType == SB_HORZ ? tmetr.tmAveCharWidth : 1;
switch (nScrollCode)
{
case SB_LINEUP:
//case SB_LINELEFT:
sinfo.nPos -= nLineOffset;
break;
case SB_LINEDOWN:
//case SB_LINERIGHT:
sinfo.nPos += nLineOffset;
break;
case SB_PAGEUP:
//case SB_PAGELEFT:
sinfo.nPos -= sinfo.nPage;
break;
case SB_PAGEDOWN:
//case SB_PAGERIGHT:
sinfo.nPos += sinfo.nPage;
break;
case SB_THUMBTRACK:
sinfo.nPos = sinfo.nTrackPos;
break;
case SB_TOP:
//case SB_LEFT:
sinfo.nPos = 0;
break;
case SB_BOTTOM:
//case SB_RIGHT:
sinfo.nPos = sinfo.nMax;
break;
default:
return;
}
ValidateScrollInfo(&sinfo);
sinfo.fMask = SIF_POS;
SetScrollInfo(m_hwnd, nScrollBarType, &sinfo, TRUE);
if (sinfo.nPos != nOldPos)
{
int nHorOffset, nVertOffset;
if (nScrollBarType == SB_HORZ)
{
nHorOffset = nOldPos - sinfo.nPos;
nVertOffset = 0;
}
else
{
nHorOffset = 0;
nVertOffset = (nOldPos - sinfo.nPos) * tmetr.tmHeight;
}
RECT rcClient;
GetClientRect(m_hwnd, &rcClient);
// Explicitly clip output to override style CS_PARENTDC.
ScrollWindowEx(m_hwnd, nHorOffset, nVertOffset, &rcClient, &rcClient, NULL, NULL, SW_INVALIDATE);
UpdateWindow(m_hwnd);
}
}
