Animate search suggestions.

Telegram/SourceFiles/dialogs/dialogs_widget.cpp

@@ -1030,10 +1030,7 @@ void Widget::fullSearchRefreshOn(rpl::producer<> events) {
 
 void Widget::updateControlsVisibility(bool fast) {
 	updateLoadMoreChatsVisibility();
-	_scroll->setVisible(!_suggestions);
-	if (_suggestions) {
-		_suggestions->show();
-	}
+	_scroll->setVisible(!_suggestions && _hidingSuggestions.empty());
 	updateStoriesVisibility();
 	if ((_openedFolder || _openedForum) && _searchHasFocus) {
 		setInnerFocus();
@@ -1120,10 +1117,32 @@ void Widget::updateSuggestions(anim::type animated) {
 	const auto suggest = _searchHasFocus
 		&& !_searchInChat
 		&& (_inner->state() == WidgetState::Default);
+	if (anim::Disabled() || !session().data().chatsListLoaded()) {
+		animated = anim::type::instant;
+	}
 	if (!suggest && _suggestions) {
-		_suggestions = nullptr;
-		_scroll->show();
+		if (animated == anim::type::normal) {
+			startWidthAnimation();
+			_suggestions->hide(animated, [=, raw = _suggestions.get()] {
+				stopWidthAnimation();
+				_hidingSuggestions.erase(
+					ranges::remove(
+						_hidingSuggestions,
+						raw,
+						&std::unique_ptr<Suggestions>::get),
+					end(_hidingSuggestions));
+				updateControlsVisibility();
+			});
+			_hidingSuggestions.push_back(std::move(_suggestions));
+		} else {
+			_suggestions = nullptr;
+			_hidingSuggestions.clear();
+			_scroll->show();
+		}
 	} else if (suggest && !_suggestions) {
+		if (animated == anim::type::normal) {
+			startWidthAnimation();
+		}
 		_suggestions = std::make_unique<Suggestions>(
 			this,
 			controller(),
@@ -1141,9 +1160,12 @@ void Widget::updateSuggestions(anim::type animated) {
 			}
 		}, _suggestions->lifetime());
 
-		_suggestions->show();
-		_scroll->hide();
 		updateControlsGeometry();
+
+		_suggestions->show(animated, [=] {
+			stopWidthAnimation();
+		});
+		_scroll->hide();
 	}
 }
 
@@ -1542,18 +1564,15 @@ void Widget::scrollToDefault(bool verytop) {
 		anim::sineInOut);
 }
 
-void Widget::startWidthAnimation() {
-	if (!_widthAnimationCache.isNull()) {
-		return;
-	}
+[[nodiscard]] QPixmap Widget::grabNonNarrowScrollFrame() {
 	auto scrollGeometry = _scroll->geometry();
 	auto grabGeometry = QRect(
 		scrollGeometry.x(),
 		scrollGeometry.y(),
-		st::columnMinimalWidthLeft,
+		std::max(scrollGeometry.width(), st::columnMinimalWidthLeft),
 		scrollGeometry.height());
 	_scroll->setGeometry(grabGeometry);
-	_inner->resize(st::columnMinimalWidthLeft, _inner->height());
+	_inner->resize(grabGeometry.width(), _inner->height());
 	_inner->setNarrowRatio(0.);
 	Ui::SendPendingMoveResizeEvents(_scroll);
 	auto image = QImage(
@@ -1565,11 +1584,18 @@ void Widget::startWidthAnimation() {
 		QPainter p(&image);
 		Ui::RenderWidget(p, _scroll);
 	}
-	_widthAnimationCache = Ui::PixmapFromImage(std::move(image));
 	if (scrollGeometry != grabGeometry) {
 		_scroll->setGeometry(scrollGeometry);
 		updateControlsGeometry();
 	}
+	return Ui::PixmapFromImage(std::move(image));
+}
+
+void Widget::startWidthAnimation() {
+	if (!_widthAnimationCache.isNull()) {
+		return;
+	}
+	_widthAnimationCache = grabNonNarrowScrollFrame();
 	_scroll->hide();
 	updateStoriesVisibility();
 }
@@ -1578,9 +1604,6 @@ void Widget::stopWidthAnimation() {
 	_widthAnimationCache = QPixmap();
 	if (!_showAnimation) {
 		_scroll->setVisible(!_suggestions);
-		if (_suggestions) {
-			_suggestions->show();
-		}
 	}
 	updateStoriesVisibility();
 	update();
@@ -3226,7 +3249,15 @@ void Widget::paintEvent(QPaintEvent *e) {
 
 	auto belowTop = _scroll->y() + _scroll->height();
 	if (!_widthAnimationCache.isNull()) {
-		p.drawPixmapLeft(0, _scroll->y(), width(), _widthAnimationCache);
+		const auto suggestionsShown = _suggestions
+			? _suggestions->shownOpacity()
+			: !_hidingSuggestions.empty()
+			? _hidingSuggestions.back()->shownOpacity()
+			: 0.;
+		const auto suggestionsSkip = suggestionsShown
+			* (st::topPeers.height + st::searchedBarHeight);
+		const auto top = _scroll->y() + suggestionsSkip;
+		p.drawPixmapLeft(0, top, width(), _widthAnimationCache);
 		belowTop = _scroll->y()
 			+ (_widthAnimationCache.height() / style::DevicePixelRatio());
 	}
@@ -3302,12 +3333,17 @@ bool Widget::cancelSearch() {
 		setFocus();
 		clearingInChat = true;
 	}
+	const auto clearSearchFocus = !_searchInChat && _searchHasFocus;
+	if (!_suggestions && clearSearchFocus) {
+		// Don't create suggestions in unfocus case.
+		setFocus();
+	}
 	_lastSearchPeer = nullptr;
 	_lastSearchId = _lastSearchMigratedId = 0;
 	_inner->clearFilter();
 	clearSearchField();
 	applySearchUpdate();
-	if (!_searchInChat && _searchHasFocus) {
+	if (_suggestions && clearSearchFocus) {
 		setFocus();
 	}
 	return clearingQuery || clearingInChat;

Telegram/SourceFiles/dialogs/dialogs_widget.h

@@ -105,6 +105,7 @@ public:
 	void jumpToTop(bool belowPinned = false);
 	void raiseWithTooltip();
 
+	[[nodiscard]] QPixmap grabNonNarrowScrollFrame();
 	void startWidthAnimation();
 	void stopWidthAnimation();
 
@@ -277,6 +278,7 @@ private:
 	object_ptr<Ui::ElasticScroll> _scroll;
 	QPointer<InnerWidget> _inner;
 	std::unique_ptr<Suggestions> _suggestions;
+	std::vector<std::unique_ptr<Suggestions>> _hidingSuggestions;
 	class BottomButton;
 	object_ptr<BottomButton> _updateTelegram = { nullptr };
 	object_ptr<BottomButton> _loadMoreChats = { nullptr };

Telegram/SourceFiles/dialogs/ui/dialogs_suggestions.cpp

@@ -545,8 +545,61 @@ void Suggestions::chooseRow() {
 	}
 }
 
+void Suggestions::show(anim::type animated, Fn<void()> finish) {
+	RpWidget::show();
+
+	_hidden = false;
+	if (animated == anim::type::instant) {
+		_shownAnimation.stop();
+		_scroll->show();
+	} else {
+		_shownAnimation.start([=] {
+			update();
+			if (!_shownAnimation.animating() && finish) {
+				finish();
+				_cache = QPixmap();
+				_scroll->show();
+			}
+		}, 0., 1., st::slideDuration, anim::easeOutQuint);
+		_cache = Ui::GrabWidget(_scroll.get());
+		_scroll->hide();
+	}
+}
+
+void Suggestions::hide(anim::type animated, Fn<void()> finish) {
+	_hidden = true;
+	if (isHidden()) {
+		return;
+	} else if (animated == anim::type::instant) {
+		RpWidget::hide();
+	} else {
+		_shownAnimation.start([=] {
+			update();
+			if (!_shownAnimation.animating() && finish) {
+				finish();
+			}
+		}, 1., 0., st::slideDuration, anim::easeOutQuint);
+		_cache = Ui::GrabWidget(_scroll.get());
+		_scroll->hide();
+	}
+}
+
+float64 Suggestions::shownOpacity() const {
+	return _shownAnimation.value(_hidden ? 0. : 1.);
+}
+
 void Suggestions::paintEvent(QPaintEvent *e) {
-	QPainter(this).fillRect(e->rect(), st::windowBg);
+	const auto opacity = shownOpacity();
+	auto color = st::windowBg->c;
+	color.setAlphaF(color.alphaF() * opacity);
+
+	auto p = QPainter(this);
+	p.fillRect(e->rect(), color);
+	if (_scroll->isHidden()) {
+		const auto slide = st::topPeers.height + st::searchedBarHeight;
+		p.setOpacity(opacity);
+		p.drawPixmap(0, (opacity - 1.) * slide, _cache);
+	}
 }
 
 void Suggestions::resizeEvent(QResizeEvent *e) {

Telegram/SourceFiles/dialogs/ui/dialogs_suggestions.h

@@ -9,6 +9,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "base/object_ptr.h"
 #include "dialogs/ui/top_peers_strip.h"
+#include "ui/effects/animations.h"
 #include "ui/rp_widget.h"
 
 namespace Main {
@@ -44,6 +45,10 @@ public:
 	void selectJump(Qt::Key direction, int pageSize = 0);
 	void chooseRow();
 
+	void show(anim::type animated, Fn<void()> finish);
+	void hide(anim::type animated, Fn<void()> finish);
+	[[nodiscard]] float64 shownOpacity() const;
+
 	[[nodiscard]] rpl::producer<not_null<PeerData*>> topPeerChosen() const {
 		return _topPeerChosen.events();
 	}
@@ -81,6 +86,11 @@ private:
 	rpl::event_stream<not_null<PeerData*>> _topPeerChosen;
 	rpl::event_stream<not_null<PeerData*>> _recentPeerChosen;
 
+	Ui::Animations::Simple _shownAnimation;
+	Fn<void()> _showFinished;
+	bool _hidden = false;
+	QPixmap _cache;
+
 };
 
 [[nodiscard]] rpl::producer<TopPeersList> TopPeersContent(