From a178f5a031d6cb0ff571a970ff5642e44a70842d Mon Sep 17 00:00:00 2001
From: wp <wp.no-reply@lazarus-ide-org>
Date: Sun, 3 Mar 2019 10:14:36 +0000
Subject: [PATCH] TAChart: Change fit parameter count in the setter of
 TFitSeries.FitEquation only when required. Issue #35178.

git-svn-id: trunk@60566 -
---
 components/tachart/tafuncseries.pas | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/components/tachart/tafuncseries.pas b/components/tachart/tafuncseries.pas
index be32365822..f56ad9be70 100644
--- a/components/tachart/tafuncseries.pas
+++ b/components/tachart/tafuncseries.pas
@@ -1630,7 +1630,7 @@ begin
   FPen.OnChange := @StyleChanged;
   FStep := DEF_FIT_STEP;
   FConfidenceLevel := 0.95;
-  ParamCount := DEF_FIT_PARAM_COUNT; // Parabolic fit as default.
+  SetParamCount(DEF_FIT_PARAM_COUNT); // Parabolic fit as default.
   InvalidateFitResults;
 end;
 
@@ -2130,8 +2130,8 @@ procedure TFitSeries.SetFitEquation(AValue: TFitEquation);
 begin
   if FFitEquation = AValue then exit;
   FFitEquation := AValue;
-  SetLength(
-    FFitParams, IfThen(FFitEquation in [fePolynomial, feCustom], DEF_FIT_PARAM_COUNT, 2));
+  if not (FFitEquation in [fePolynomial, feCustom]) then
+    SetLength(FFitParams, 2);
   InvalidateFitResults;
   UpdateParentChart;
 end;