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Fix fast scrolling with Shift+Scroll

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When holding down the shift key, multiply wheel and touchpad scroll
distances by 10 to re-implement the fast scrolling feature that
broke when we added animated/smooth scrolling.

BUG: 420889
FIXED-IN: 1.11.3
This commit is contained in:
Nate Graham 2020-10-20 19:03:38 -06:00
parent 8b008b02fc
commit 777ac37ea2
1 changed files with 5 additions and 2 deletions
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7
ui/pageview.cpp
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@ -3126,16 +3126,19 @@ void PageView::wheelEvent(QWheelEvent *e)
d->scroller->scrollTo(QPoint(horizontalScrollBar()->value(), verticalScrollBar()->value()), 0); // sync scroller with scrollbar
}
} else {
// When the shift key is held down, scroll ten times faster
int multiplier = e->modifiers() & Qt::ShiftModifier ? 10 : 1;
if (delta != 0 && delta % QWheelEvent::DefaultDeltasPerStep == 0) {
// number of scroll wheel steps Qt gives to us at the same time
int count = abs(delta / QWheelEvent::DefaultDeltasPerStep);
int count = abs(delta / QWheelEvent::DefaultDeltasPerStep) * multiplier;
if (delta < 0) {
slotScrollDown(count);
} else {
slotScrollUp(count);
}
} else {
d->scroller->scrollTo(d->scroller->finalPosition() - e->angleDelta() / 4.0, 0);
d->scroller->scrollTo(d->scroller->finalPosition() - e->angleDelta() * multiplier / 4.0, 0);
}
}
}