Disable creating public polls in channels.

Telegram/SourceFiles/boxes/create_poll_box.cpp

@@ -712,8 +712,10 @@ void Options::checkLastOption() {
 CreatePollBox::CreatePollBox(
 	QWidget*,
 	not_null<Main::Session*> session,
+	PublicVotes publicVotes,
 	Api::SendType sendType)
 : _session(session)
+, _publicVotes(publicVotes)
 , _sendType(sendType) {
 }
 
@@ -813,13 +815,15 @@ object_ptr<Ui::RpWidget> CreatePollBox::setupContent() {
 	AddSkip(container);
 	AddSubsectionTitle(container, tr::lng_polls_create_settings());
 
-	const auto anonymous = container->add(
-		object_ptr<Ui::Checkbox>(
-			container,
-			tr::lng_polls_create_anonymous(tr::now),
-			true,
-			st::defaultCheckbox),
-		st::createPollCheckboxMargin);
+	const auto anonymous = (_publicVotes == PublicVotes::Enabled)
+		? container->add(
+			object_ptr<Ui::Checkbox>(
+				container,
+				tr::lng_polls_create_anonymous(tr::now),
+				true,
+				st::defaultCheckbox),
+			st::createPollCheckboxMargin)
+		: nullptr;
 	const auto multiple = container->add(
 		object_ptr<Ui::Checkbox>(
 			container,
@@ -873,7 +877,9 @@ object_ptr<Ui::RpWidget> CreatePollBox::setupContent() {
 		auto result = PollData(&_session->data(), id);
 		result.question = question->getLastText().trimmed();
 		result.answers = options->toPollAnswers();
-		result.setFlags((anonymous->checked() ? Flag(0) : Flag::PublicVotes)
+		const auto publicVotes = (anonymous && !anonymous->checked());
+		result.setFlags(Flag(0)
+			| (publicVotes ? Flag::PublicVotes : Flag(0))
 			| (multiple->checked() ? Flag::MultiChoice : Flag(0))
 			| (quiz->checked() ? Flag::Quiz : Flag(0)));
 		return result;

Telegram/SourceFiles/boxes/create_poll_box.h

@@ -27,10 +27,15 @@ public:
 		PollData poll;
 		Api::SendOptions options;
 	};
+	enum class PublicVotes {
+		Enabled,
+		Disabled,
+	};
 
 	CreatePollBox(
 		QWidget*,
 		not_null<Main::Session*> session,
+		PublicVotes publicVotes,
 		Api::SendType sendType);
 
 	rpl::producer<Result> submitRequests() const;
@@ -47,6 +52,7 @@ private:
 		not_null<Ui::VerticalLayout*> container);
 
 	const not_null<Main::Session*> _session;
+	const PublicVotes _publicVotes = PublicVotes();
 	const Api::SendType _sendType = Api::SendType();
 	Fn<void()> _setInnerFocus;
 	Fn<rpl::producer<bool>()> _dataIsValidValue;

Telegram/SourceFiles/window/window_peer_menu.cpp

@@ -710,6 +710,9 @@ void PeerMenuShareContactBox(
 void PeerMenuCreatePoll(not_null<PeerData*> peer) {
 	const auto box = Ui::show(Box<CreatePollBox>(
 		&peer->session(),
+		((peer->isChannel() && !peer->isMegagroup())
+			? CreatePollBox::PublicVotes::Disabled
+			: CreatePollBox::PublicVotes::Enabled),
 		Api::SendType::Normal));
 	const auto lock = box->lifetime().make_state<bool>(false);
 	box->submitRequests(