From 0163938e00c478f478068905891e0a933158abc9 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 30 Jan 2024 13:15:38 +0400
Subject: [PATCH] Add shadow below tags list widget.

---
 .../controls/history_view_compose_search.cpp  | 23 +++++++++++++++----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/Telegram/SourceFiles/history/view/controls/history_view_compose_search.cpp b/Telegram/SourceFiles/history/view/controls/history_view_compose_search.cpp
index 930e4c369..5d3b1eee1 100644
--- a/Telegram/SourceFiles/history/view/controls/history_view_compose_search.cpp
+++ b/Telegram/SourceFiles/history/view/controls/history_view_compose_search.cpp
@@ -26,6 +26,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/widgets/buttons.h"
 #include "ui/widgets/labels.h"
 #include "ui/widgets/multi_select.h"
+#include "ui/widgets/shadow.h"
 #include "ui/widgets/scroll_area.h"
 #include "ui/painter.h"
 #include "window/window_session_controller.h"
@@ -433,11 +434,27 @@ void TopBar::refreshTags() {
 		&_history->owner(),
 		reactions->myTagsValue(sublist),
 		_searchTagsSelected);
+
+	const auto parent = _searchTags->lifetime().make_state<Ui::RpWidget>(
+		this);
+	const auto shadow = _searchTags->lifetime().make_state<Ui::PlainShadow>(
+		parentWidget());
+	parent->show();
+
 	_searchTags->heightValue(
-	) | rpl::start_with_next([=] {
+	) | rpl::start_with_next([=](int height) {
 		updateSize();
+		shadow->setVisible(height > 0);
 	}, _searchTags->lifetime());
 
+	geometryValue() | rpl::start_with_next([=](QRect geometry) {
+		shadow->setGeometry(
+			geometry.x(),
+			geometry.y() + geometry.height(),
+			geometry.width(),
+			st::lineWidth);
+	}, shadow->lifetime());
+
 	_searchTags->selectedChanges(
 	) | rpl::start_with_next([=](std::vector<Data::ReactionId> &&list) {
 		_searchTagsSelected = std::move(list);
@@ -450,10 +467,6 @@ void TopBar::refreshTags() {
 		});
 	}
 
-	const auto parent = _searchTags->lifetime().make_state<Ui::RpWidget>(
-		this);
-	parent->show();
-
 	const auto padding = st::searchInChatTagsPadding;
 	const auto position = QPoint(padding.left(), padding.top());