Added minimal threshold to emoji preview for reaction selector.

Telegram/SourceFiles/chat_helpers/chat_helpers.style

@@ -451,6 +451,8 @@ emojiPanSlideDuration: 200;
 emojiPanArea: size(34px, 32px);
 emojiPanRadius: 8px;
 emojiPanReactionsPreviewPadding: margins(10px, 20px, 10px, 20px);
+emojiPanEmojiPreviewMinHeight: 160px;
+emojiPanEmojiPreviewRadius: 8px + 8px + 4px;
 
 defaultTabbedSearchCancel: CrossButton {
 	width: 33px;

Telegram/SourceFiles/chat_helpers/emoji_list_widget.cpp

@@ -47,6 +47,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "emoji_suggestions_helper.h"
 #include "main/main_session.h"
 #include "main/main_session_settings.h"
+#include "mainwidget.h"
 #include "core/core_settings.h"
 #include "core/application.h"
 #include "settings/settings_premium.h"
@@ -710,12 +711,22 @@ void EmojiListWidget::ensureMediaPreview() {
 		? controller->sessionController()
 		: nullptr;
 	if (sessionController) {
-		_mediaPreview.create(_mediaPreviewParent, sessionController);
-		_mediaPreview->setCustomPadding(st::emojiPanReactionsPreviewPadding);
-		_mediaPreview->setBackgroundMargins(_mediaPreviewMargins);
-		_mediaPreview->setCornersSkip(st::emojiPanRadius - st::lineWidth);
+		const auto tooSmall = _mediaPreviewParent->height()
+			< st::emojiPanEmojiPreviewMinHeight;
+		const auto parent = tooSmall
+			? sessionController->content()
+			: _mediaPreviewParent;
+		_mediaPreview = base::make_unique_q<Window::MediaPreviewWidget>(
+			parent,
+			sessionController);
+		if (!tooSmall) {
+			_mediaPreview->setCustomPadding(
+				st::emojiPanReactionsPreviewPadding);
+			_mediaPreview->setBackgroundMargins(_mediaPreviewMargins);
+			_mediaPreview->setCustomRadius(st::emojiPanEmojiPreviewRadius);
+		}
 		_mediaPreview->show();
-		_mediaPreview->setGeometry(_mediaPreviewParent->geometry());
+		_mediaPreview->setGeometry(parent->geometry());
 		_mediaPreview->raise();
 	}
 }

Telegram/SourceFiles/chat_helpers/emoji_list_widget.h

@@ -487,7 +487,7 @@ private:
 	bool _previewShown = false;
 
 
-	object_ptr<Window::MediaPreviewWidget> _mediaPreview = { nullptr };
+	base::unique_qptr<Window::MediaPreviewWidget> _mediaPreview;
 
 	rpl::event_stream<EmojiChosen> _chosen;
 	rpl::event_stream<FileChosen> _customChosen;

Telegram/SourceFiles/window/window_media_preview.cpp

@@ -20,6 +20,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "main/main_session.h"
 #include "ui/emoji_config.h"
 #include "ui/image/image.h"
+#include "ui/painter.h"
 #include "ui/rect.h"
 #include "ui/ui_utility.h"
 #include "window/window_session_controller.h"
@@ -78,19 +79,12 @@ QRect MediaPreviewWidget::updateArea() const {
 void MediaPreviewWidget::paintEvent(QPaintEvent *e) {
 	auto p = QPainter(this);
 
-	if (_cornersSkip > 0) {
+	if (_customRadius > 0) {
+		auto hq = PainterHighQualityEnabler(p);
 		const auto r = rect() - _backgroundMargins;
-		auto clipRegion = QRegion(r);
-		const auto skip = _cornersSkip;
-		clipRegion -= QRect(r.x(), r.y(), skip, skip);
-		clipRegion -= QRect(r.x() + r.width() - skip, r.y(), skip, skip);
-		clipRegion -= QRect(r.x(), r.y() + r.height() - skip, skip, skip);
-		clipRegion -= QRect(
-			r.x() + r.width() - skip,
-			r.y() + r.height() - skip,
-			skip,
-			skip);
-		p.setClipRegion(clipRegion);
+		auto path = QPainterPath();
+		path.addRoundedRect(r, _customRadius, _customRadius);
+		p.setClipPath(path);
 	}
 
 	const auto r = e->rect();
@@ -310,8 +304,8 @@ void MediaPreviewWidget::setBackgroundMargins(const QMargins &margins) {
 	update();
 }
 
-void MediaPreviewWidget::setCornersSkip(int pixels) {
-	_cornersSkip = pixels;
+void MediaPreviewWidget::setCustomRadius(int radius) {
+	_customRadius = radius;
 	update();
 }
 

Telegram/SourceFiles/window/window_media_preview.h

@@ -40,7 +40,7 @@ public:
 	void hidePreview();
 	void setCustomPadding(const QMargins &padding = QMargins());
 	void setBackgroundMargins(const QMargins &margins = QMargins());
-	void setCornersSkip(int pixels);
+	void setCustomRadius(int radius);
 
 	~MediaPreviewWidget();
 
@@ -92,7 +92,7 @@ private:
 	mutable QSize _cachedSize;
 	QMargins _customPadding;
 	QMargins _backgroundMargins;
-	int _cornersSkip = 0;
+	int _customRadius = 0;
 
 };