From aa260453c7de2854eb829701ee4f28415b9efc69 Mon Sep 17 00:00:00 2001
From: Oleh Marchenko <oleh.marchenko.95@gmail.com>
Date: Mon, 19 Aug 2024 12:15:30 +0300
Subject: [PATCH] added isDefault to `GridAxisData`s, painting
 `defaultDivisionInterval` if data is default

---
 CHANGELOG.md                         | 5 +++++
 lib/src/candlestick/data.dart        | 4 ++++
 lib/src/common/chart.data.dart       | 3 +++
 lib/src/common/gridaxis/painter.dart | 2 +-
 lib/src/line/data.dart               | 3 +++
 5 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index da66eab..357779c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 6.2.1 - 19.08.2024
+
+* Changes of the `GridAxis` based charts (`LineChart`/`CandlestickChart`):
+  * Added extra condition (if data is default alongside with empty data) for painting `GridAxisSettings.defaultDivisionInterval`.
+
 ## 6.2.0 - 19.08.2024
 
 * Changes of the `GridAxis` based charts (`LineChart`/`CandlestickChart`):
diff --git a/lib/src/candlestick/data.dart b/lib/src/candlestick/data.dart
index c250bec..b63973e 100644
--- a/lib/src/candlestick/data.dart
+++ b/lib/src/candlestick/data.dart
@@ -146,6 +146,10 @@ class CandlestickChartData extends GridAxisData<CandlestickData> {
   @override
   double minValuePredicate(CandlestickData value) => value.low;
 
+  @override
+  bool get isDefault =>
+      data.values.every((v) => v == const CandlestickData.zero());
+
   /// Creates a copy of the current object with new values specified in
   /// arguments.
   CandlestickChartData copyWith({
diff --git a/lib/src/common/chart.data.dart b/lib/src/common/chart.data.dart
index e7eeb47..5d000d4 100644
--- a/lib/src/common/chart.data.dart
+++ b/lib/src/common/chart.data.dart
@@ -67,6 +67,9 @@ abstract class ChartData<T> {
   /// It checks for [data] length to be greater than or equal to 1.
   bool get canDraw => data.isNotEmpty;
 
+  /// Checks whether every data entry is a default value ot not.
+  bool get isDefault;
+
   /// Checks whether every data entry is less than or equal to `0` and any of
   /// it strictly less than `0` or not.
   bool get isNegative =>
diff --git a/lib/src/common/gridaxis/painter.dart b/lib/src/common/gridaxis/painter.dart
index 810f8d3..361020a 100644
--- a/lib/src/common/gridaxis/painter.dart
+++ b/lib/src/common/gridaxis/painter.dart
@@ -97,7 +97,7 @@ class GridAxisPainter extends CustomPainter {
       }
 
       double labelValue;
-      if (data.data.isEmpty) {
+      if (data.data.isEmpty || data.isDefault) {
         labelValue =
             mult(math.max(settings.defaultDivisionInterval, 1), yEnd - i - 1);
       } else if (data.isNegative) {
diff --git a/lib/src/line/data.dart b/lib/src/line/data.dart
index f0d38c5..80a94c6 100644
--- a/lib/src/line/data.dart
+++ b/lib/src/line/data.dart
@@ -66,6 +66,9 @@ class LineChartData extends GridAxisData<double> {
   @override
   double minValuePredicate(double value) => value;
 
+  @override
+  bool get isDefault => data.values.every((v) => v == 0);
+
   /// {@macro ChartData.maxValue}
   /// (Omitting [limit] value)
   ///