//////////////////
// Get size information for a single entry (WINRECT). Returns size info in
// the SIZEINFO argument. For a group, calculate size info as aggregate of
// subentries.
//
void
CWinMgr::OnGetSizeInfo(SIZEINFO& szi, WINRECT* wrc, HWND hWnd)
{
szi.szMin = SIZEZERO; // default min size = zero
szi.szMax = SIZEMAX; // default max size = infinite
szi.szDesired = RectToSize(wrc->GetRect()); // default desired size = current
if (wrc->IsGroup()) {
// For groups, calculate min, max, desired size as aggregate of children
szi.szDesired = SIZEZERO;
BOOL bRow = wrc->IsRowGroup();
CWinGroupIterator it;
for (it=wrc; it; it.Next()) {
WINRECT* wrc2 = it;
SIZEINFO szi2;
OnGetSizeInfo(szi2, wrc2, hWnd);
if (bRow) {
szi.szMin.cx = max(szi.szMin.cx, szi2.szMin.cx);
szi.szMin.cy += szi2.szMin.cy;
szi.szMax.cx = min(szi.szMax.cx, szi2.szMax.cx);
szi.szMax.cy = min(szi.szMax.cy + szi2.szMax.cy, SHRT_MAX);
szi.szDesired.cx = max(szi.szDesired.cx, szi2.szDesired.cx);
szi.szDesired.cy += szi2.szDesired.cy;
} else {
szi.szMin.cx += szi2.szMin.cx;
szi.szMin.cy = max(szi.szMin.cy, szi2.szMin.cy);
szi.szMax.cx = min(szi.szMax.cx + szi2.szMax.cx, SHRT_MAX);
szi.szMax.cy = min(szi.szMax.cy, szi2.szMax.cy);
szi.szDesired.cx += szi2.szDesired.cx;
szi.szDesired.cy = max(szi.szDesired.cy, szi2.szDesired.cy);
}
}
// Add margins.
int w2,h2;
wrc->GetMargins(w2,h2); // get margins
w2<<=1; h2<<=1; // double
szi.szMin.cx += max(0,w2); // negative margins ==> don't include in min
szi.szMin.cy += max(0,h2); // ditto
szi.szDesired.cx += abs(w2); // for desired size, use abs vallue
szi.szDesired.cy += abs(h2); // ditto
} else {
// not a group
WINRECT* parent = wrc->Parent();
assert(parent);
RECT& rcParent = parent->GetRect();
BOOL bRow = parent->IsRowGroup();
int hw, hwMin, hwTotal, pct;
switch (wrc->Type()) {
case WRCT_FIXED:
hw = hwMin = wrc->GetParam(); // ht/wid is parameter
if (hw<0) { // if fixed val is negative:
hw = -hw; // use absolute val for desired..
hwMin = 0; // ..and zero for minimum
}
if (bRow) {
szi.szMax.cy = szi.szDesired.cy = hw;
szi.szMin.cy = hwMin;
} else {
szi.szMax.cx = szi.szDesired.cx = hw;
szi.szMin.cx = hwMin;
}
break;
case WRCT_PCT:
pct = wrc->GetParam();
assert(0<pct && pct<100);
hwTotal = bRow ? RectHeight(rcParent) : RectWidth(rcParent);
hw = (hwTotal * pct) / 100;
szi.szDesired = bRow ? GetSize(RectWidth(rcParent), hw) : GetSize(hw, RectHeight(rcParent));
break;
case WRCT_TOFIT:
if (wrc->HasToFitSize()) {
szi.szDesired = wrc->GetToFitSize();
}
break;
case WRCT_REST:
break;
default:
assert(FALSE);
}
// If the entry is a window, send message to get min/max/tofit size.
// Only set tofit size if type is TOFIT.
//
if (wrc->IsWindow() && hWnd) {
HWND hChild = GetDlgItem(hWnd, wrc->GetID());
if (hChild) {
if (!IsWindowVisible(hChild) && IsWindowVisible(hWnd)) {
// parent visible but child not ==> tofit size is zero
// important so hidden windows use no space
szi.szDesired = SIZEZERO;
} else {
szi.szAvail = RectToSize(rcParent);
SendGetSizeInfo(szi, hWnd, wrc->GetID());
}
}
}
szi.szDesired = maxsize(minsize(szi.szDesired,szi.szMax), szi.szMin);
}
}
