Added lottie icon and button to dialogs widget when dialogs are empty.

Telegram/Resources/langs/lang.strings

@@ -434,6 +434,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_dlg_new_channel_name" = "Channel name";
 "lng_dlg_new_bot_name" = "Bot name";
 "lng_no_chats" = "Your chats will be here";
+"lng_no_conversations" = "You have no\nconversations yet.";
+"lng_no_conversations_button" = "New Message";
+"lng_no_conversations_subtitle" = "Your contacts on Telegram";
 "lng_no_chats_filter" = "No chats currently belong to this folder.";
 "lng_no_saved_sublists" = "You can save messages from other chats here.";
 "lng_contacts_loading" = "Loading...";

Telegram/Resources/qrc/telegram/animations.qrc

@@ -38,6 +38,7 @@
     <file alias="topics_tabs.tgs">../../animations/edit_peers/topics_tabs.tgs</file>
     <file alias="topics_list.tgs">../../animations/edit_peers/topics_list.tgs</file>
     <file alias="direct_messages.tgs">../../animations/edit_peers/direct_messages.tgs</file>
+    <file alias="no_chats.tgs">../../animations/no_chats.tgs</file>
 
     <file alias="dice_idle.tgs">../../animations/dice/dice_idle.tgs</file>
     <file alias="dart_idle.tgs">../../animations/dice/dart_idle.tgs</file>

Telegram/SourceFiles/dialogs/dialogs.style

@@ -244,6 +244,17 @@ dialogsEmptyLabel: FlatLabel(defaultFlatLabel) {
 	align: align(top);
 	textFg: windowSubTextFg;
 }
+dialogEmptyButton: RoundButton(defaultActiveButton) {
+}
+dialogEmptyButtonSkip: 12px;
+dialogEmptyButtonLabel: FlatLabel(defaultFlatLabel) {
+	style: TextStyle(defaultTextStyle) {
+		font: font(boxFontSize semibold);
+	}
+	minWidth: 32px;
+	align: align(top);
+	textFg: windowFg;
+}
 
 dialogsMenuToggle: IconButton {
 	width: 40px;

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -31,6 +31,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/text/text_utilities.h"
 #include "ui/text/text_options.h"
 #include "ui/dynamic_thumbnails.h"
+#include "ui/vertical_list.h"
 #include "ui/painter.h"
 #include "ui/rect.h"
 #include "ui/ui_utility.h"
@@ -58,8 +59,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/options.h"
 #include "lang/lang_keys.h"
 #include "lottie/lottie_icon.h"
-#include "mainwindow.h"
+#include "settings/settings_common.h"
-#include "mainwidget.h"
 #include "storage/storage_account.h"
 #include "apiwrap.h"
 #include "main/main_session.h"
@@ -80,6 +80,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "api/api_chat_filters.h"
 #include "base/qt/qt_common_adapters.h"
 #include "styles/style_dialogs.h"
+#include "styles/style_boxes.h"
 #include "styles/style_chat.h" // popupMenuExpandedSeparator
 #include "styles/style_chat_helpers.h"
 #include "styles/style_color_indices.h"
@@ -4075,9 +4076,18 @@ void InnerWidget::refreshEmpty() {
 	if (state == EmptyState::None) {
 		_emptyState = state;
 		_empty.destroy();
+		_emptyList.destroy();
+		_emptyButton.destroy();
 		return;
 	} else if (_emptyState == state) {
 		_empty->setVisible(_state == WidgetState::Default);
+		if (_emptyList) {
+			_emptyList->setVisible(_state == WidgetState::Default);
+			_empty->setVisible(!_emptyList->isVisible());
+		}
+		if (_emptyButton) {
+			_emptyButton->setVisible(_state == WidgetState::Default);
+		}
 		return;
 	}
 	_emptyState = state;
@@ -4108,7 +4118,6 @@ void InnerWidget::refreshEmpty() {
 		return result;
 	});
 	_empty.create(this, std::move(full), st::dialogsEmptyLabel);
-	resizeEmpty();
 	_empty->overrideLinkClickHandler([=] {
 		if (_emptyState == EmptyState::NoContacts) {
 			_controller->showAddContact();
@@ -4120,6 +4129,58 @@ void InnerWidget::refreshEmpty() {
 		}
 	});
 	_empty->setVisible(_state == WidgetState::Default);
+
+	if (state == EmptyState::NoContacts) {
+		const auto isListVisible = _state == WidgetState::Default;
+		_emptyList.create(this);
+		_emptyList->setVisible(isListVisible);
+
+		auto icon = ::Settings::CreateLottieIcon(
+			_emptyList,
+			{
+				.name = u"no_chats"_q,
+				.sizeOverride = Size(st::changePhoneIconSize),
+			});
+		const auto iconWidget = _emptyList->add(
+			object_ptr<Ui::CenterWrap<>>(_emptyList, std::move(icon.widget)));
+		Ui::AddSkip(_emptyList);
+		const auto label = _emptyList->add(
+			object_ptr<Ui::FlatLabel>(
+				_emptyList,
+				tr::lng_no_conversations(),
+				st::dialogEmptyButtonLabel));
+		if (_state == WidgetState::Default) {
+			icon.animate(anim::repeat::once);
+		}
+		_emptyButton.create(
+			this,
+			tr::lng_no_conversations_button(),
+			st::dialogEmptyButton);
+		_emptyButton->setTextTransform(
+			Ui::RoundButton::TextTransform::NoTransform);
+		_emptyButton->setVisible(isListVisible);
+		_emptyButton->setClickedCallback([=, window = _controller] {
+			window->show(PrepareContactsBox(window));
+		});
+		geometryValue() | rpl::start_with_next([=](const QRect &r) {
+			const auto top = r.height()
+				- _emptyButton->height()
+				- st::dialogEmptyButtonSkip;
+			_emptyButton->moveToLeft(st::dialogEmptyButtonSkip, top);
+		}, _emptyButton->lifetime());
+		geometryValue() | rpl::start_with_next([=](const QRect &r) {
+			const auto bottom = _emptyButton
+				? (_emptyButton->height() + st::dialogEmptyButtonSkip)
+				: 0;
+			_emptyList->moveToLeft(
+				0,
+				((r.height() - bottom) - _emptyList->height()) / 2);
+		}, _emptyList->lifetime());
+
+		_empty->setVisible(!_emptyList->isVisible());
+	}
+
+	resizeEmpty();
 }
 
 void InnerWidget::resizeEmpty() {
@@ -4128,6 +4189,13 @@ void InnerWidget::resizeEmpty() {
 		_empty->resizeToWidth(width() - 2 * skip);
 		_empty->move(skip, (st::dialogsEmptyHeight - _empty->height()) / 2);
 	}
+	if (_emptyList) {
+		_emptyList->resizeToWidth(width());
+	}
+	if (_emptyButton) {
+		const auto skip = st::dialogEmptyButtonSkip;
+		_emptyButton->resizeToWidth(width() - 2 * skip);
+	}
 	if (_searchEmpty) {
 		_searchEmpty->resizeToWidth(width());
 		_searchEmpty->move(0, searchedOffset());

Telegram/SourceFiles/dialogs/dialogs_inner_widget.h

@@ -43,6 +43,8 @@ namespace Ui {
 class IconButton;
 class PopupMenu;
 class FlatLabel;
+class VerticalLayout;
+class RoundButton;
 struct ScrollToRequest;
 namespace Controls {
 enum class QuickDialogAction;
@@ -619,6 +621,8 @@ private:
 	object_ptr<SearchEmpty> _searchEmpty = { nullptr };
 	SearchState _searchEmptyState;
 	object_ptr<Ui::FlatLabel> _empty = { nullptr };
+	object_ptr<Ui::VerticalLayout> _emptyList = { nullptr };
+	object_ptr<Ui::RoundButton> _emptyButton = { nullptr };
 
 	Ui::DraggingScrollManager _draggingScroll;