From 048cc1c9664d81799687f1e8a3b48edb2d311662 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emmanuel=20Beno=C3=AEt?= <tseeker@nocternity.net>
Date: Thu, 30 Nov 2017 07:12:58 +0100
Subject: [PATCH] Sequencer - Different colors when tracks are hovered

---
 ui-sequencer.cc | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/ui-sequencer.cc b/ui-sequencer.cc
index e7ded0e..e9e7f8d 100644
--- a/ui-sequencer.cc
+++ b/ui-sequencer.cc
@@ -391,6 +391,7 @@ struct T_SyncViewImpl_
 	const uint32_t ColMain{ ImGui::GetColorU32( ImVec4{ .4 , .4 , .4 , .8 } ) };
 	const uint32_t ColSelection{ ImGui::GetColorU32( ImVec4{ .8 , 1 , .8 , .2 } ) };
 	const uint32_t ColPointNormal{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , .25 } ) };
+	const uint32_t ColPointHovered{ ImGui::GetColorU32( ImVec4{ 1 , 1 , 1 , .75 } ) };
 	const uint32_t ColPointSelected{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , .75 } ) };
 	const ImVec2 BtSize{ 20 , 0 };
 
@@ -1050,6 +1051,12 @@ void T_SyncViewImpl_::sequencerTrack(
 	if ( !container.Overlaps( bb ) ) {
 		return;
 	}
+	const ImRect bar{
+		ImVec2{ ImFloor( bb.Min.x ) ,
+			ImFloor( ImMax( container.Min.y , bb.Min.y ) ) } ,
+		ImVec2{ ImFloor( bb.Max.x ) - 1 ,
+			ImFloor( ImMin( container.Max.y , bb.Max.y ) ) }
+	};
 
 	// Add track display record
 	const auto dTrackIdx{ dspTracks.size( ) };
@@ -1061,24 +1068,21 @@ void T_SyncViewImpl_::sequencerTrack(
 
 	// Compute colors
 	using namespace ImGui;
+	auto const& mp{ GetIO( ).MousePos };
 	const bool sCurve{ selId && id == *selId };
-	const float scv{ sCurve ? 1.f : .7f };
+	const float scv{ sCurve ? 1.f : ( bar.Contains( mp ) ? .85f : .7f ) };
 	const auto bgColor{ ColorHSVAToU32( hue , .25f , scv , .25f ) } ,
 	      borderColor{ ColorHSVAToU32( hue , .5f , scv , 1.f ) };
 	const uint32_t segColors[] = {
 	      ColorHSVAToU32( hue - .03f , .4f , .7f , 1.f ) ,
 	      ColorHSVAToU32( hue + .03f , .4f , .7f , 1.f ) ,
+	      ColorHSVAToU32( hue - .03f , .4f , .85f , 1.f ) ,
+	      ColorHSVAToU32( hue + .03f , .4f , .85f , 1.f ) ,
 	      ColorHSVAToU32( hue - .03f , .4f , 1.f , 1.f ) ,
 	      ColorHSVAToU32( hue + .03f , .4f , 1.f , 1.f ) ,
 	};
 
 	// Draw the bar itself
-	const ImRect bar{
-		ImVec2{ ImFloor( bb.Min.x ) ,
-			ImFloor( ImMax( container.Min.y , bb.Min.y ) ) } ,
-		ImVec2{ ImFloor( bb.Max.x ) - 1 ,
-			ImFloor( ImMin( container.Max.y , bb.Max.y ) ) }
-	};
 	auto* const dl{ GetWindowDrawList( ) };
 	dl->AddRectFilled( bar.Min , bar.Max , bgColor );
 	if ( container.Contains( bb.GetTL( ) ) ) {
@@ -1126,7 +1130,8 @@ void T_SyncViewImpl_::sequencerTrack(
 
 		// Add segment to displayed list
 		const bool sSegment{ sCurve && selSegment && *selSegment == i };
-		const auto color{ segColors[ i % 2 + ( sSegment ? 2 : 0 ) ] };
+		const auto color{ segColors[ i % 2 + ( sSegment ? 4
+				: ( segFull.Contains( mp ) ? 2 : 0 ) ) ] };
 		auto dSegIdx{ dspSegments.size( ) };
 		auto& dSeg{ dspSegments.addNew( ) };
 		dSeg.area = segFull;
@@ -1154,8 +1159,11 @@ void T_SyncViewImpl_::sequencerTrack(
 				ym
 			};
 			const bool sPoint{ sSegment && selPoint && *selPoint == j };
+			const bool hpt{ !sPoint && segFull.Contains( mp )
+				&& ImLengthSqr( mp - ctr ) <= 2.25 * PointRadiusSqr };
 			dl->AddCircleFilled( ctr , PointRadius ,
-					sPoint ? ColPointSelected : ColPointNormal );
+					sPoint ? ColPointSelected
+						: ( hpt ? ColPointHovered : ColPointNormal ) );
 			cDur += j < nd ? seg.durations[ j ] : 0;
 
 			// Add point record