From 18850ebd83e9a3c4de9b40c3d2b8f0c76617a1c4 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 20 Jan 2025 16:56:57 +0400
Subject: [PATCH] Gradient on premium gift discount badge.

---
 .../peer_gifts/info_peer_gifts_common.cpp     | 35 ++++++++++++++-----
 .../info/peer_gifts/info_peer_gifts_common.h  |  2 +-
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.cpp b/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.cpp
index 54c7cc007..14a07a667 100644
--- a/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.cpp
+++ b/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.cpp
@@ -50,7 +50,11 @@ std::strong_ordering operator<=>(const GiftBadge &a, const GiftBadge &b) {
 	if (result3 != std::strong_ordering::equal) {
 		return result3;
 	}
-	return a.fg.rgb() <=> b.fg.rgb();
+	const auto result4 = (a.fg.rgb() <=> b.fg.rgb());
+	if (result4 != std::strong_ordering::equal) {
+		return result4;
+	}
+	return a.gradient <=> b.gradient;
 }
 
 GiftButton::GiftButton(
@@ -381,8 +385,10 @@ void GiftButton::paintEvent(QPaintEvent *e) {
 			const auto kMinus = QChar(0x2212);
 			return GiftBadge{
 				.text = kMinus + QString::number(data.discountPercent) + '%',
-				.bg1 = st::attentionButtonFg->c,
+				.bg1 = st::premiumButtonBg3->c,
+				.bg2 = st::premiumButtonBg2->c,
 				.fg = st::windowBg->c,
+				.gradient = true,
 				.small = true,
 			};
 		}
@@ -686,18 +692,31 @@ QImage ValidateRotatedBadge(const GiftBadge &badge, int added) {
 		auto p = QPainter(&result);
 		auto hq = PainterHighQualityEnabler(p);
 		p.setPen(Qt::NoPen);
-		p.setBrush(badge.bg1);
 
 		p.save();
 		p.translate(textpos);
 		p.rotate(45.);
 		const auto rect = QRect(-5 * twidth, 0, twidth * 12, font->height);
-		p.drawRect(rect);
-		if (badge.bg2.alpha() > 0) {
-			p.setOpacity(0.5);
-			p.setBrush(badge.bg2);
+		if (badge.gradient) {
+			const auto skip = font->height / M_SQRT2;
+			auto gradient = QLinearGradient(
+				QPointF(-twidth - skip, 0),
+				QPointF(twidth + skip, 0));
+			gradient.setStops({
+				{ 0., badge.bg1 },
+				{ 1., badge.bg2 },
+			});
+			p.setBrush(gradient);
 			p.drawRect(rect);
-			p.setOpacity(1.);
+		} else {
+			p.setBrush(badge.bg1);
+			p.drawRect(rect);
+			if (badge.bg2.alpha() > 0) {
+				p.setOpacity(0.5);
+				p.setBrush(badge.bg2);
+				p.drawRect(rect);
+				p.setOpacity(1.);
+			}
 		}
 		p.restore();
 
diff --git a/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.h b/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.h
index faab730ef..bba226aaa 100644
--- a/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.h
+++ b/Telegram/SourceFiles/info/peer_gifts/info_peer_gifts_common.h
@@ -77,6 +77,7 @@ struct GiftBadge {
 	QColor bg1;
 	QColor bg2 = QColor(0, 0, 0, 0);
 	QColor fg;
+	bool gradient = false;
 	bool small = false;
 
 	explicit operator bool() const {
@@ -119,7 +120,6 @@ public:
 	GiftButton(QWidget *parent, not_null<GiftButtonDelegate*> delegate);
 	~GiftButton();
 
-
 	using Mode = GiftButtonMode;
 	void setDescriptor(const GiftDescriptor &descriptor, Mode mode);
 	void setGeometry(QRect inner, QMargins extend);