From 50f87cce84f594e57f359432a8741e41d45c4375 Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Mon, 18 Jan 2021 00:44:03 +0300
Subject: [PATCH] Added arcs animation to volume menu item in group calls.

---
 Telegram/SourceFiles/calls/calls.style        | 15 ++++++
 .../SourceFiles/calls/calls_volume_item.cpp   | 51 +++++++++++++++++--
 .../SourceFiles/calls/calls_volume_item.h     |  8 +++
 3 files changed, 70 insertions(+), 4 deletions(-)

diff --git a/Telegram/SourceFiles/calls/calls.style b/Telegram/SourceFiles/calls/calls.style
index bb5e042fdf..8f60171797 100644
--- a/Telegram/SourceFiles/calls/calls.style
+++ b/Telegram/SourceFiles/calls/calls.style
@@ -786,6 +786,21 @@ groupCallMuteCrossLine: CrossLineAnimation {
 	stroke: 2px;
 }
 
+groupCallMenuSpeakerArcsSkip: 1px;
+groupCallMenuVolumeSkip: 5px;
+
+groupCallSpeakerArcsAnimation: ArcsAnimation {
+	fg: groupCallIconFg;
+	stroke: 2px;
+	space: 4px;
+	duration: 200;
+	deltaAngle: 60;
+	deltaHeight: 6px;
+	deltaWidth: 7px;
+	startHeight: 3px;
+	startWidth: 0px;
+}
+
 callTopBarMuteCrossLine: CrossLineAnimation {
 	fg: callBarFg;
 	icon: icon {{ "calls/call_record_active", callBarFg }};
diff --git a/Telegram/SourceFiles/calls/calls_volume_item.cpp b/Telegram/SourceFiles/calls/calls_volume_item.cpp
index 15836eb06f..95ed0afda3 100644
--- a/Telegram/SourceFiles/calls/calls_volume_item.cpp
+++ b/Telegram/SourceFiles/calls/calls_volume_item.cpp
@@ -14,11 +14,18 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "styles/style_calls.h"
 #include "styles/style_media_player.h"
 
+#include "ui/paint/arcs.h"
+
 namespace Calls {
 namespace {
 
 constexpr auto kMaxVolumePercent = 200;
 
+constexpr auto kSpeakerThreshold = {
+	10.0f / kMaxVolumePercent,
+	50.0f / kMaxVolumePercent,
+	150.0f / kMaxVolumePercent };
+
 } // namespace
 
 MenuVolumeItem::MenuVolumeItem(
@@ -38,7 +45,12 @@ MenuVolumeItem::MenuVolumeItem(
 , _dummyAction(new QAction(parent))
 , _st(st)
 , _stCross(st::groupCallMuteCrossLine)
-, _crossLineMute(std::make_unique<Ui::CrossLineAnimation>(_stCross, true)) {
+, _crossLineMute(std::make_unique<Ui::CrossLineAnimation>(_stCross, true))
+, _arcs(std::make_unique<Ui::Paint::ArcsAnimation>(
+	st::groupCallSpeakerArcsAnimation,
+	kSpeakerThreshold,
+	_localMuted ? 0. : (startVolume / float(maxVolume)),
+	Ui::Paint::ArcsAnimation::HorizontalDirection::Right)) {
 
 	initResizeHook(parent->sizeValue());
 	enableMouseSelecting();
@@ -48,12 +60,18 @@ MenuVolumeItem::MenuVolumeItem(
 		const auto geometry = QRect(QPoint(), size);
 		_itemRect = geometry - _st.itemPadding;
 		_speakerRect = QRect(_itemRect.topLeft(), _stCross.icon.size());
-		_volumeRect = _speakerRect.translated(_stCross.icon.width(), 0);
+		_volumeRect = _speakerRect.translated(
+			_stCross.icon.width() + st::groupCallMenuVolumeSkip,
+			0);
+		_arcPosition = _speakerRect.center()
+			+ QPoint(0, st::groupCallMenuSpeakerArcsSkip);
 
 		_slider->setGeometry(_itemRect
 			- style::margins(0, contentHeight() / 2, 0, 0));
 	}, lifetime());
 
+	setCloudVolume(startVolume);
+
 	paintRequest(
 	) | rpl::start_with_next([=](const QRect &clip) {
 		Painter p(this);
@@ -78,9 +96,12 @@ MenuVolumeItem::MenuVolumeItem(
 			_speakerRect.topLeft(),
 			muteProgress,
 			(!muteProgress) ? std::nullopt : std::optional<QColor>(mutePen));
-	}, lifetime());
 
-	setCloudVolume(startVolume);
+		{
+			p.translate(_arcPosition);
+			_arcs->paint(p);
+		}
+	}, lifetime());
 
 	_slider->setChangeProgressCallback([=](float64 value) {
 		const auto newMuted = (value == 0);
@@ -98,6 +119,7 @@ MenuVolumeItem::MenuVolumeItem(
 			_changeVolumeLocallyRequests.fire(value * _maxVolume);
 		}
 		update(_volumeRect);
+		_arcs->setValue(value);
 	});
 
 	const auto returnVolume = [=] {
@@ -152,6 +174,27 @@ MenuVolumeItem::MenuVolumeItem(
 		}
 		_waitingForUpdateVolume = false;
 	}, lifetime());
+
+	initArcsAnimation();
+}
+
+void MenuVolumeItem::initArcsAnimation() {
+	_arcsAnimation.init([=](crl::time now) {
+		_arcs->update(now);
+		update(_speakerRect);
+	});
+
+	_arcs->startUpdateRequests(
+	) | rpl::start_with_next([=] {
+		if (!_arcsAnimation.animating()) {
+			_arcsAnimation.start();
+		}
+	}, lifetime());
+
+	_arcs->stopUpdateRequests(
+	) | rpl::start_with_next([=] {
+		_arcsAnimation.stop();
+	}, lifetime());
 }
 
 QColor MenuVolumeItem::unmuteColor() const {
diff --git a/Telegram/SourceFiles/calls/calls_volume_item.h b/Telegram/SourceFiles/calls/calls_volume_item.h
index a51888868c..5ba9258358 100644
--- a/Telegram/SourceFiles/calls/calls_volume_item.h
+++ b/Telegram/SourceFiles/calls/calls_volume_item.h
@@ -13,6 +13,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 namespace Ui {
 class CrossLineAnimation;
 class MediaSlider;
+namespace Paint {
+class ArcsAnimation;
+} // namespace Paint
 } // namespace Ui
 
 namespace Calls {
@@ -45,6 +48,8 @@ protected:
 	int contentHeight() const override;
 
 private:
+	void initArcsAnimation();
+
 	void setCloudVolume(int volume);
 	void setSliderVolume(int volume);
 
@@ -60,6 +65,7 @@ private:
 	QRect _itemRect;
 	QRect _speakerRect;
 	QRect _volumeRect;
+	QPoint _arcPosition;
 
 	const base::unique_qptr<Ui::MediaSlider> _slider;
 	const not_null<QAction*> _dummyAction;
@@ -68,6 +74,8 @@ private:
 
 	const std::unique_ptr<Ui::CrossLineAnimation> _crossLineMute;
 	Ui::Animations::Simple _crossLineAnimation;
+	const std::unique_ptr<Ui::Paint::ArcsAnimation> _arcs;
+	Ui::Animations::Basic _arcsAnimation;
 
 	rpl::event_stream<bool> _toggleMuteRequests;
 	rpl::event_stream<bool> _toggleMuteLocallyRequests;