+
+ // try corner-snap to its other sides
+ dtop = std::abs(wtop - winrect.top());
+ dbottom = std::abs(wbottom - winrect.bottom());
+ if (dtop < snap_distance && dtop <= dbottom)
+ dy = winrect.top();
+ else if (dbottom < snap_distance)
+ dy = winrect.bottom() - frame.rect.height();
+