void CurveWnd::onSize(HWND hwnd, UINT state, int cx, int cy){
int nMax, nPos;
nPos = getScrollPos(SB_HORZ);
nMax = canvas.cx - 1;
if(cx > canvas.cx - nPos){
if(cx >= canvas.cx)
nPos = 0;
else
nPos = canvas.cx - cx;
}
setScrollInfo(SB_HORZ, 0, nMax, cx, nPos);
nPos = getScrollPos(SB_VERT);
nMax = canvas.cy - 1;
if(cy > canvas.cy - nPos){
if(cy >= canvas.cy)
nPos = 0;
else
nPos = canvas.cy - cy;
}
setScrollInfo(SB_VERT, 0, nMax, cy, nPos);
}
void CurveWnd::resetScroll(){
RECT cr;
GetClientRect(hwnd, &cr);
setScrollInfo(SB_HORZ, 0, canvas.cx, cr.right, 0);
setScrollInfo(SB_VERT, 0, canvas.cy, cr.bottom, 0);
}
LRESULT CDataView::OnSize(UINT state, CSize Size)
{
if (IsWindow() && Size.cx != 0 && Size.cy != 0) {
CPoint pt = getScrollPt();
setScrollInfo(pt.x, pt.y);
// Invalidate();
// UpdateWindow();
}
return 0;
}
void CDataView::setScale(double newScale)
{
newScale = fixZoomScale(newScale);
CRect rec;
GetClientRect(rec);
CPoint pt = getScrollPt();
double ratio;
if (newScale < m_scale) {
ratio = 1.0 - newScale/m_scale;
CPoint offset(rec.Width()*ratio, rec.Height()*ratio);
pt.x = pt.x / (m_scale/newScale) - offset.x/2;
pt.y = pt.y / (m_scale/newScale) - offset.y/2;
}else {
ratio = 1.0 - m_scale/newScale;
CPoint offset(rec.Width()*ratio, rec.Height()*ratio);
pt.x = (pt.x + offset.x/2) / (m_scale/newScale);
pt.y = (pt.y + offset.y/2) / (m_scale/newScale);
}
// pt += offset;
m_scale = newScale;
setScrollInfo(pt.x, pt.y);
}
void CDataView::setZoomWindow(double newScale, int hPos, int vPos)
{
m_scale = fixZoomScale(newScale);
setScrollInfo(hPos*m_scale, vPos*m_scale);
}
