From b9992e5eb69d2defd5ad94cf95321f3ed750c92f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 9 Jul 2018 10:49:50 +0200
Subject: [PATCH] [apps/reg] Keep cursor on same series when changing a
 regression type

---
 apps/regression/graph_controller.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 6c9f50405..7df88df87 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -224,7 +224,9 @@ void GraphController::initRangeParameters() {
 }
 
 void GraphController::initCursorParameters() {
-  *m_selectedSeriesIndex = m_store->indexOfKthNonEmptySeries(0);
+  if (*m_selectedSeriesIndex < 0 || m_store->seriesIsEmpty(*m_selectedSeriesIndex)) {
+    *m_selectedSeriesIndex = m_store->indexOfKthNonEmptySeries(0);
+  }
   double x = m_store->meanOfColumn(*m_selectedSeriesIndex, 0);
   double y = m_store->meanOfColumn(*m_selectedSeriesIndex, 1);
   m_cursor->moveTo(x, y);