Start extracting timeline height control logic.

server/TracyTimelineController.cpp

@@ -0,0 +1,29 @@
+#include "imgui.h"
+
+#include "TracyTimelineController.hpp"
+
+namespace tracy
+{
+
+TimelineController::TimelineController()
+    : m_height( 0 )
+    , m_offset( 0 )
+    , m_scroll( 0 )
+{
+}
+
+void TimelineController::End( float offset )
+{
+    const auto scrollPos = ImGui::GetScrollY();
+    if( scrollPos == 0 && m_scroll != 0 )
+    {
+        m_height = 0;
+    }
+    else
+    {
+        if( offset > m_height ) m_height = offset;
+    }
+    m_scroll = scrollPos;
+}
+
+}