static LRESULT CALLBACK
ScrollHookWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
CSkinScrollWnd* pSkin = (CSkinScrollWnd*)GetWindowLong(hwnd, GWL_USERDATA);
WNDPROC procOld = NULL;
switch (msg)
{
case WM_DESTROY:
procOld = pSkin->m_funOldProc;
UnskinWndScroll(CWnd::FromHandle(hwnd));
return CallWindowProc(pSkin->m_funOldProc, hwnd, msg, wParam, lParam);
case WM_ERASEBKGND:
SCROLLINFO si;
DWORD dwStyle = GetWindowLong(hwnd, GWL_STYLE);
if (dwStyle&WS_VSCROLL)
{
memset(&si, 0, sizeof(si));
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetScrollInfo(hwnd, SB_VERT, &si);
}
}
}
static LRESULT CALLBACK
HookWndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
{
CSkinScrollWnd *pSkin=(CSkinScrollWnd*)GetWindowLong(hwnd,GWL_USERDATA);
if(msg==WM_DESTROY)
{
WNDPROC procOld=pSkin->m_funOldProc;
UnskinWndScroll(CWnd::FromHandle(hwnd));
return ::CallWindowProc(procOld,hwnd,msg,wp,lp);
}
LRESULT lr=::CallWindowProc(pSkin->m_funOldProc,hwnd,msg,wp,lp);
if(pSkin->m_bOp) return lr;
if(msg==WM_ERASEBKGND)
{
SCROLLINFO si;
DWORD dwStyle=::GetWindowLong(hwnd,GWL_STYLE);
if(dwStyle&WS_VSCROLL)
{
memset(&si,0,sizeof(si));
si.cbSize=sizeof(si);
si.fMask=SIF_ALL;
::GetScrollInfo(hwnd,SB_VERT,&si);
if(si.nMax!=pSkin->m_sbVert.m_si.nMax
||si.nMin!=pSkin->m_sbVert.m_si.nMin
||si.nPos!=pSkin->m_sbVert.m_si.nPos
||si.nPage!=pSkin->m_sbVert.m_si.nPage)
{
pSkin->m_sbVert.SetScrollInfo(&si,!pSkin->m_bOp);
pSkin->m_sbVert.EnableWindow(si.nMax>=si.nPage);
}
}
if(dwStyle&WS_HSCROLL)
{
memset(&si,0,sizeof(si));
si.cbSize=sizeof(si);
si.fMask=SIF_ALL;
::GetScrollInfo(hwnd,SB_HORZ,&si);
if(si.nMax!=pSkin->m_sbHorz.m_si.nMax
||si.nMin!=pSkin->m_sbHorz.m_si.nMin
||si.nPos!=pSkin->m_sbHorz.m_si.nPos
||si.nPage!=pSkin->m_sbHorz.m_si.nPage)
{
pSkin->m_sbHorz.SetScrollInfo(&si,!pSkin->m_bOp);
pSkin->m_sbHorz.EnableWindow(si.nMax>=si.nPage);
}
}
}else if(msg==WM_NCCALCSIZE && wp)
{
LPNCCALCSIZE_PARAMS pNcCalcSizeParam=(LPNCCALCSIZE_PARAMS)lp;
DWORD dwStyle=::GetWindowLong(hwnd,GWL_STYLE);
DWORD dwExStyle=::GetWindowLong(hwnd,GWL_EXSTYLE);
BOOL bLeftScroll=dwExStyle&WS_EX_LEFTSCROLLBAR;
int nWid=::GetSystemMetrics(SM_CXVSCROLL);
if(dwStyle&WS_VSCROLL)
{
if(bLeftScroll)
pNcCalcSizeParam->rgrc[0].left-=nWid-pSkin->m_nScrollWid;
else
pNcCalcSizeParam->rgrc[0].right+=nWid-pSkin->m_nScrollWid;
}
if(dwStyle&WS_HSCROLL) pNcCalcSizeParam->rgrc[0].bottom+=nWid-pSkin->m_nScrollWid;
RECT rc,rcVert,rcHorz;
::GetWindowRect(hwnd,&rc);
::OffsetRect(&rc,-rc.left,-rc.top);
nWid=pSkin->m_nScrollWid;
if(bLeftScroll)
{
int nLeft=pNcCalcSizeParam->rgrc[0].left;
int nBottom=pNcCalcSizeParam->rgrc[0].bottom;
rcVert.right=nLeft;
rcVert.left=nLeft-nWid;
rcVert.top=0;
rcVert.bottom=nBottom;
rcHorz.left=nLeft;
rcHorz.right=pNcCalcSizeParam->rgrc[0].right;
rcHorz.top=nBottom;
rcHorz.bottom=nBottom+nWid;
}else
{
int nRight=pNcCalcSizeParam->rgrc[0].right;
int nBottom=pNcCalcSizeParam->rgrc[0].bottom;
rcVert.left=nRight;
rcVert.right=nRight+nWid;
rcVert.top=0;
rcVert.bottom=nBottom;
rcHorz.left=0;
rcHorz.right=nRight;
rcHorz.top=nBottom;
rcHorz.bottom=nBottom+nWid;
}
if(dwStyle&WS_VSCROLL && dwStyle&WS_HSCROLL)
{
pSkin->m_nAngleType=bLeftScroll?1:2;
}else
{
pSkin->m_nAngleType=0;
}
if(dwStyle&WS_VSCROLL)
{
pSkin->m_sbVert.MoveWindow(&rcVert);
pSkin->m_sbVert.ShowWindow(SW_SHOW);
}else
{
pSkin->m_sbVert.ShowWindow(SW_HIDE);
}
if(dwStyle&WS_HSCROLL)
{
pSkin->m_sbHorz.MoveWindow(&rcHorz);
pSkin->m_sbHorz.ShowWindow(SW_SHOW);
}else
{
pSkin->m_sbHorz.ShowWindow(SW_HIDE);
}
pSkin->PostMessage(UM_DESTMOVE,dwStyle&WS_VSCROLL,bLeftScroll);
}
return lr;
}