Show preview in Frequent Contacts.

Telegram/SourceFiles/dialogs/ui/dialogs_suggestions.cpp

@@ -10,6 +10,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "api/api_chat_participants.h"
 #include "apiwrap.h"
 #include "base/unixtime.h"
+#include "base/qt/qt_key_modifiers.h"
 #include "boxes/peer_list_box.h"
 #include "data/components/recent_peers.h"
 #include "data/components/top_peers.h"
@@ -940,6 +941,16 @@ void Suggestions::setupChats() {
 		_topPeerChosen.fire(_controller->session().data().peer(peerId));
 	}, _topPeers->lifetime());
 
+	_topPeers->pressed() | rpl::start_with_next([=](uint64 peerIdRaw) {
+		handlePressForChatPreview(PeerId(peerIdRaw), [=] {
+			_topPeers->cancelPress();
+		});
+	}, _topPeers->lifetime());
+
+	_topPeers->pressCancelled() | rpl::start_with_next([=] {
+		_controller->cancelScheduledPreview();
+	}, _topPeers->lifetime());
+
 	_topPeers->showMenuRequests(
 	) | rpl::start_with_next([=](const ShowTopPeerMenuRequest &request) {
 		const auto weak = Ui::MakeWeak(this);
@@ -983,6 +994,24 @@ void Suggestions::setupChats() {
 	_chatsScroll->setVisible(_tab.current() == Tab::Chats);
 }
 
+void Suggestions::handlePressForChatPreview(
+		PeerId id,
+		Fn<void()> cancelPress) {
+	const auto callback = crl::guard(this, [=](bool shown) {
+		if (shown) {
+			cancelPress();
+		}
+	});
+	const auto row = RowDescriptor(
+		_controller->session().data().history(id),
+		FullMsgId());
+	if (base::IsAltPressed()) {
+		_controller->showChatPreview(row, callback);
+	} else {
+		_controller->scheduleChatPreview(row, callback);
+	}
+}
+
 void Suggestions::setupChannels() {
 	_myChannelsCount.value() | rpl::start_with_next([=](int count) {
 		_myChannels->toggle(count > 0, anim::type::instant);

Telegram/SourceFiles/dialogs/ui/dialogs_suggestions.h

@@ -122,6 +122,8 @@ private:
 	void startSlideAnimation();
 	void finishShow();
 
+	void handlePressForChatPreview(PeerId id, Fn<void()> cancelPress);
+
 	const not_null<Window::SessionController*> _controller;
 
 	const std::unique_ptr<Ui::SettingsSlider> _tabs;

Telegram/SourceFiles/dialogs/ui/top_peers_strip.cpp

@@ -286,6 +286,8 @@ void TopPeersStrip::stripMousePressEvent(QMouseEvent *e) {
 		entry.ripple->add(e->pos() - QPoint(
 			x + st::topPeersMargin.left(),
 			y + st::topPeersMargin.top()));
+
+		_presses.fire_copy(entry.id);
 	}
 }
 
@@ -304,6 +306,7 @@ void TopPeersStrip::stripMouseMoveEvent(QMouseEvent *e) {
 	if (!_dragging && _mouseDownPosition) {
 		if ((*_lastMousePosition - *_mouseDownPosition).manhattanLength()
 			>= QApplication::startDragDistance()) {
+			_pressCancelled.fire({});
 			if (!_expandAnimation.animating()) {
 				_dragging = true;
 				_startDraggingLeft = _scrollLeft;
@@ -371,6 +374,8 @@ void TopPeersStrip::subscribeUserpic(Entry &entry) {
 }
 
 void TopPeersStrip::stripMouseReleaseEvent(QMouseEvent *e) {
+	_pressCancelled.fire({});
+
 	_lastMousePosition = e->globalPos();
 	const auto guard = gsl::finally([&] {
 		_mouseDownPosition = std::nullopt;
@@ -428,6 +433,29 @@ rpl::producer<uint64> TopPeersStrip::clicks() const {
 	return _clicks.events();
 }
 
+rpl::producer<uint64> TopPeersStrip::pressed() const {
+	return _presses.events();
+}
+
+rpl::producer<> TopPeersStrip::pressCancelled() const {
+	return _pressCancelled.events();
+}
+
+void TopPeersStrip::cancelPress() {
+	const auto pressed = std::exchange(_pressed, -1);
+	if (pressed >= 0) {
+		Assert(pressed < _entries.size());
+		auto &entry = _entries[pressed];
+		if (entry.ripple) {
+			entry.ripple->lastStop();
+		}
+	}
+	if (finishDragging()) {
+		return;
+	}
+	_mouseDownPosition = std::nullopt;
+}
+
 auto TopPeersStrip::showMenuRequests() const
 -> rpl::producer<ShowTopPeerMenuRequest> {
 	return _showMenuRequests.events();

Telegram/SourceFiles/dialogs/ui/top_peers_strip.h

@@ -50,6 +50,8 @@ public:
 	[[nodiscard]] bool empty() const;
 	[[nodiscard]] rpl::producer<bool> emptyValue() const;
 	[[nodiscard]] rpl::producer<uint64> clicks() const;
+	[[nodiscard]] rpl::producer<uint64> pressed() const;
+	[[nodiscard]] rpl::producer<> pressCancelled() const;
 	[[nodiscard]] auto showMenuRequests() const
 		-> rpl::producer<ShowTopPeerMenuRequest>;
 	[[nodiscard]] auto scrollToRequests() const
@@ -61,6 +63,7 @@ public:
 	bool selectByKeyboard(Qt::Key direction);
 	void deselectByKeyboard();
 	bool chooseRow();
+	void cancelPress();
 
 	uint64 updateFromParentDrag(QPoint globalPosition);
 	void dragLeft();
@@ -114,6 +117,8 @@ private:
 	rpl::variable<Ui::LinkButton*> _toggleExpanded = nullptr;
 
 	rpl::event_stream<uint64> _clicks;
+	rpl::event_stream<uint64> _presses;
+	rpl::event_stream<> _pressCancelled;
 	rpl::event_stream<ShowTopPeerMenuRequest> _showMenuRequests;
 	rpl::event_stream<not_null<QWheelEvent*>> _verticalScrollEvents;
 

Telegram/SourceFiles/window/window_chat_preview.cpp

@@ -110,7 +110,7 @@ bool ChatPreviewManager::schedule(
 			cancelScheduled();
 			_menu = nullptr;
 		});
-	} else {
+	} else if (!row.key.history()) {
 		return false;
 	}
 	_scheduled = std::move(row);