From 251e8f1fe2f7ebe338b8413f08aeed7f21ff9ef5 Mon Sep 17 00:00:00 2001
From: Bartosz Taudul <wolf.pld@gmail.com>
Date: Wed, 5 Aug 2020 17:20:19 +0200
Subject: [PATCH] Fix vertical panning.

---
 server/TracyView.cpp | 16 ++++++++++------
 server/TracyView.hpp |  1 +
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/server/TracyView.cpp b/server/TracyView.cpp
index 751782bc..6e903034 100644
--- a/server/TracyView.cpp
+++ b/server/TracyView.cpp
@@ -1902,6 +1902,7 @@ void View::HandleZoneViewMouse( int64_t timespan, const ImVec2& wpos, float w, d
         m_zoomAnim.active = false;
         if( !m_playback.pause && m_playback.sync ) m_playback.pause = true;
         const auto delta = GetMouseDragDelta( 1 );
+        m_yDelta = delta.y;
         const auto dpx = int64_t( (delta.x * nspx) + (hwheel_delta * nspx));
         if( dpx != 0 )
         {
@@ -1922,12 +1923,6 @@ void View::HandleZoneViewMouse( int64_t timespan, const ImVec2& wpos, float w, d
                 m_vd.zvStart = m_vd.zvEnd - range;
             }
         }
-        if( delta.y != 0 )
-        {
-            auto y = ImGui::GetScrollY();
-            ImGui::SetScrollY( y - delta.y );
-            io.MouseClickedPos[1].y = io.MousePos.y;
-        }
     }
 
     const auto wheel = io.MouseWheel;
@@ -2434,6 +2429,7 @@ void View::DrawZones()
     m_zoneHover2.Decay( nullptr );
     m_findZone.range.StartFrame();
     m_statRange.StartFrame();
+    m_yDelta = 0;
 
     if( m_vd.zvStart == m_vd.zvEnd ) return;
     assert( m_vd.zvStart < m_vd.zvEnd );
@@ -2494,6 +2490,14 @@ void View::DrawZones()
 
     ImGui::BeginChild( "##zoneWin", ImVec2( ImGui::GetWindowContentRegionWidth(), ImGui::GetContentRegionAvail().y ), false, ImGuiWindowFlags_AlwaysVerticalScrollbar | ImGuiWindowFlags_NoScrollWithMouse );
 
+    if( m_yDelta != 0 )
+    {
+        auto& io = ImGui::GetIO();
+        auto y = ImGui::GetScrollY();
+        ImGui::SetScrollY( y - m_yDelta );
+        io.MouseClickedPos[1].y = io.MousePos.y;
+    }
+
     const auto wpos = ImGui::GetCursorScreenPos();
     const auto h = std::max<float>( m_vd.zvHeight, ImGui::GetContentRegionAvail().y - 4 );    // magic border value
 
diff --git a/server/TracyView.hpp b/server/TracyView.hpp
index 4709e35d..3520c0bb 100644
--- a/server/TracyView.hpp
+++ b/server/TracyView.hpp
@@ -446,6 +446,7 @@ private:
 
     bool m_reconnectRequested = false;
     int m_firstFrame = 10;
+    float m_yDelta;
 
     std::vector<SourceRegex> m_sourceSubstitutions;
     bool m_sourceRegexValid = true;