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Code Issues Releases Wiki Activity

Implement nice stories list scrolling.

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This commit is contained in:
John Preston
2023-05-23 20:13:02 +04:00
parent 1d27c8c940
commit 16128d61c0
8 changed files with 248 additions and 29 deletions
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43
Telegram/SourceFiles/dialogs/dialogs_widget.cpp
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@@ -260,6 +260,11 @@ Widget::Widget(
}
}, lifetime());
_inner->scrollToVeryTopRequests(
) | rpl::start_with_next([=] {
scrollToDefaultChecked(true);
}, lifetime());
_inner->mustScrollTo(
) | rpl::start_with_next([=](const Ui::ScrollToRequest &data) {
if (_scroll) {
@@ -527,13 +532,15 @@ void Widget::setGeometryWithTopMoved(
_topDelta = 0;
}
void Widget::scrollToDefaultChecked(bool verytop) {
if (_scrollToAnimation.animating()) {
return;
}
scrollToDefault(verytop);
}
void Widget::setupScrollUpButton() {
_scrollToTop->setClickedCallback([=] {
if (_scrollToAnimation.animating()) {
return;
}
scrollToTop();
});
_scrollToTop->setClickedCallback([=] { scrollToDefaultChecked(); });
base::install_event_filter(_scrollToTop, [=](not_null<QEvent*> event) {
if (event->type() != QEvent::Wheel) {
return base::EventFilterResult::Continue;
@@ -1111,10 +1118,13 @@ void Widget::jumpToTop(bool belowPinned) {
}
}
void Widget::scrollToTop() {
void Widget::scrollToDefault(bool verytop) {
_scrollToAnimation.stop();
auto scrollTop = _scroll->scrollTop();
const auto scrollTo = 0;
const auto scrollTo = verytop ? 0 : _inner->defaultScrollTop();
if (scrollTop <= scrollTo) {
return;
}
const auto maxAnimatedDelta = _scroll->height();
if (scrollTo + maxAnimatedDelta < scrollTop) {
scrollTop = scrollTo + maxAnimatedDelta;
@@ -2494,7 +2504,11 @@ void Widget::updateControlsGeometry() {
}
auto scrollTop = forumReportTop
+ (_forumReportBar ? _forumReportBar->bar().height() : 0);
auto newScrollTop = _scroll->scrollTop() + _topDelta;
const auto wasScrollTop = _scroll->scrollTop();
const auto newScrollTop = (_topDelta < 0
&& wasScrollTop <= _inner->defaultScrollTop())
? wasScrollTop
: (wasScrollTop + _topDelta);
auto scrollHeight = height() - scrollTop;
const auto putBottomButton = [&](auto &button) {
if (button && !button->isHidden()) {
@@ -2518,13 +2532,22 @@ void Widget::updateControlsGeometry() {
const auto scrollw = _childList ? _narrowWidth : barw;
const auto wasScrollHeight = _scroll->height();
if (scrollHeight >= wasScrollHeight) {
_inner->setViewportHeight(scrollHeight);
}
_scroll->setGeometry(0, scrollTop, scrollw, scrollHeight);
if (scrollHeight < wasScrollHeight) {
_inner->setViewportHeight(scrollHeight);
}
_inner->resize(scrollw, _inner->height());
_inner->setNarrowRatio(narrowRatio);
if (scrollHeight != wasScrollHeight) {
controller()->floatPlayerAreaUpdated();
}
if (_topDelta) {
const auto startWithTop = _inner->defaultScrollTop();
if (wasScrollHeight < startWithTop && scrollHeight >= startWithTop) {
_scroll->scrollToY(startWithTop);
} else if (newScrollTop != wasScrollTop) {
_scroll->scrollToY(newScrollTop);
} else {
listScrollUpdated();