From ba4987cc4e61e44c78cf6d04878857258a9eedbf Mon Sep 17 00:00:00 2001
From: Felix Dietze <felix.dietze@rwth-aachen.de>
Date: Fri, 18 Jun 2021 19:03:01 +0200
Subject: [PATCH] Fix initial rendering of inactive trackbar

`_inactiveTrack()` calculates `top` and `left` from `_handlersPadding`.
But `_handlersPadding` is calculated in `_arrangeHandlersPosition()` after the inactive track is initially drawn.
`_arrangeHandlersPosition()` uses `_contraintMaxWidth` and `_constraintMaxHeight`. This commit calculates it early enough when the required values are ready.
---
 lib/flutter_xlider.dart | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/flutter_xlider.dart b/lib/flutter_xlider.dart
index 29244f7..b815e4a 100644
--- a/lib/flutter_xlider.dart
+++ b/lib/flutter_xlider.dart
@@ -260,6 +260,8 @@ class _FlutterSliderState extends State<FlutterSlider>
             builder: (BuildContext context, BoxConstraints constraints) {
           _constraintMaxWidth = constraints.maxWidth;
           _constraintMaxHeight = constraints.maxHeight;
+          _arrangeHandlersPosition();
+
 
           _containerWidthWithoutPadding = _constraintMaxWidth - _handlersWidth!;
           _containerHeightWithoutPadding =
@@ -442,8 +444,6 @@ class _FlutterSliderState extends State<FlutterSlider>
     WidgetsBinding.instance!.addPostFrameCallback((_) {
       _renderBoxInitialization();
 
-      _arrangeHandlersPosition();
-
       _drawHatchMark();
 
       setState(() {});