bool ScrollArea::touchScroll(const QPoint &delta) { int32 scTop = scrollTop(), scMax = scrollTopMax(), scNew = snap(scTop - delta.y(), 0, scMax); if (scNew == scTop) return false; scrollToY(scNew); return true; }
void ScrollArea::scrollToY(int toTop, int toBottom) { myEnsureResized(widget()); myEnsureResized(this); int toMin = 0, toMax = scrollTopMax(); if (toTop < toMin) { toTop = toMin; } else if (toTop > toMax) { toTop = toMax; } bool exact = (toBottom < 0); int curTop = scrollTop(), curHeight = height(), curBottom = curTop + curHeight, scToTop = toTop; if (!exact && toTop >= curTop) { if (toBottom < toTop) toBottom = toTop; if (toBottom <= curBottom) return; scToTop = toBottom - curHeight; if (scToTop > toTop) scToTop = toTop; if (scToTop == curTop) return; } else { scToTop = toTop; } verticalScrollBar()->setValue(scToTop); }
int ScrollArea::scrollHeight() const { return scrollTopMax() + height(); }