From 8d98eec733034dc53992f9be936553fd16e0569f Mon Sep 17 00:00:00 2001
From: John Castronuovo <johncas@kth.se>
Date: Fri, 22 Jan 2021 21:47:39 +0100
Subject: [PATCH] feat(bartooltip): add textspan children parameter for
 idsplaying more information on a bar chart tooltip

---
 lib/src/chart/bar_chart/bar_chart_data.dart    | 9 +++++++--
 lib/src/chart/bar_chart/bar_chart_painter.dart | 7 ++++++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/lib/src/chart/bar_chart/bar_chart_data.dart b/lib/src/chart/bar_chart/bar_chart_data.dart
index fa9a973d7d..0414aafde7 100644
--- a/lib/src/chart/bar_chart/bar_chart_data.dart
+++ b/lib/src/chart/bar_chart/bar_chart_data.dart
@@ -768,16 +768,21 @@ class BarTooltipItem with EquatableMixin {
   /// TextStyle of the showing content.
   final TextStyle textStyle;
 
+  /// List<InlineSpan> for more flexibility in showing content.
+  final List<InlineSpan> children;
+
   /// content of the tooltip, is a [text] String with a [textStyle].
-  BarTooltipItem(String text, TextStyle textStyle)
+  BarTooltipItem(String text, TextStyle textStyle, [List<InlineSpan> children])
       : text = text,
-        textStyle = textStyle;
+        textStyle = textStyle,
+        children = children;
 
   /// Used for equality check, see [EquatableMixin].
   @override
   List<Object> get props => [
         text,
         textStyle,
+        children,
       ];
 }
 
diff --git a/lib/src/chart/bar_chart/bar_chart_painter.dart b/lib/src/chart/bar_chart/bar_chart_painter.dart
index 4c5efc2f54..36c0f85f09 100644
--- a/lib/src/chart/bar_chart/bar_chart_painter.dart
+++ b/lib/src/chart/bar_chart/bar_chart_painter.dart
@@ -510,7 +510,12 @@ class BarChartPainter extends AxisChartPainter<BarChartData> with TouchHandler<B
       return;
     }
 
-    final span = TextSpan(style: tooltipItem.textStyle, text: tooltipItem.text);
+    final span = TextSpan(
+      style: tooltipItem.textStyle,
+      text: tooltipItem.text,
+      children: tooltipItem.children,
+    );
+
     final tp = TextPainter(
         text: span,
         textAlign: TextAlign.center,