From cbace9162600a2840aae42f76dd3bf53dec1796d Mon Sep 17 00:00:00 2001
From: imaNNeoFighT <iman.neofight@gmail.com>
Date: Thu, 3 Oct 2019 14:41:37 +0330
Subject: [PATCH] added interval field in the SideTitles class, fixed issue #67

---
 lib/src/chart/bar_chart/bar_chart_painter.dart     | 4 ++--
 lib/src/chart/base/base_chart/base_chart_data.dart | 3 +++
 lib/src/chart/line_chart/line_chart_painter.dart   | 8 ++++----
 repo_files/documentations/base_chart.md            | 1 +
 4 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/lib/src/chart/bar_chart/bar_chart_painter.dart b/lib/src/chart/bar_chart/bar_chart_painter.dart
index 459bc892b..365ca86ad 100644
--- a/lib/src/chart/bar_chart/bar_chart_painter.dart
+++ b/lib/src/chart/bar_chart/bar_chart_painter.dart
@@ -243,7 +243,7 @@ class BarChartPainter extends AxisChartPainter {
     final leftTitles = data.titlesData.leftTitles;
     if (leftTitles.showTitles) {
       int verticalCounter = 0;
-      while (data.gridData.verticalInterval * verticalCounter <= data.maxY) {
+      while (leftTitles.interval * verticalCounter <= data.maxY) {
         double x = 0 + getLeftOffsetDrawSize();
         double y = getPixelY(
                 data.gridData.verticalInterval * verticalCounter, drawSize) +
@@ -270,7 +270,7 @@ class BarChartPainter extends AxisChartPainter {
     final rightTitles = data.titlesData.rightTitles;
     if (rightTitles.showTitles) {
       int verticalCounter = 0;
-      while (data.gridData.verticalInterval * verticalCounter <= data.maxY) {
+      while (rightTitles.interval * verticalCounter <= data.maxY) {
         double x = drawSize.width + getLeftOffsetDrawSize();
         double y = getPixelY(
                 data.gridData.verticalInterval * verticalCounter, drawSize) +
diff --git a/lib/src/chart/base/base_chart/base_chart_data.dart b/lib/src/chart/base/base_chart/base_chart_data.dart
index 71e82e121..efc54f87e 100644
--- a/lib/src/chart/base/base_chart/base_chart_data.dart
+++ b/lib/src/chart/base/base_chart/base_chart_data.dart
@@ -124,6 +124,7 @@ class SideTitles {
   final double reservedSize;
   final TextStyle textStyle;
   final double margin;
+  final double interval;
 
   const SideTitles({
     this.showTitles = false,
@@ -134,6 +135,7 @@ class SideTitles {
       fontSize: 11,
     ),
     this.margin = 6,
+    this.interval = 1.0,
   });
 
   static SideTitles lerp(SideTitles a, SideTitles b, double t) {
@@ -143,6 +145,7 @@ class SideTitles {
       reservedSize: lerpDouble(a.reservedSize, b.reservedSize, t),
       textStyle: TextStyle.lerp(a.textStyle, b.textStyle, t),
       margin: lerpDouble(a.margin, b.margin, t),
+      interval: lerpDouble(a.interval, b.interval, t),
     );
   }
 }
diff --git a/lib/src/chart/line_chart/line_chart_painter.dart b/lib/src/chart/line_chart/line_chart_painter.dart
index 62739ccba..3bfb2e3f4 100644
--- a/lib/src/chart/line_chart/line_chart_painter.dart
+++ b/lib/src/chart/line_chart/line_chart_painter.dart
@@ -481,7 +481,7 @@ class LineChartPainter extends AxisChartPainter {
         y -= tp.height / 2;
         tp.paint(canvas, Offset(x, y));
 
-        verticalSeek += data.gridData.verticalInterval;
+        verticalSeek += leftTitles.interval;
       }
     }
 
@@ -507,7 +507,7 @@ class LineChartPainter extends AxisChartPainter {
 
         tp.paint(canvas, Offset(x, y));
 
-        horizontalSeek += data.gridData.horizontalInterval;
+        horizontalSeek += topTitles.interval;
       }
     }
 
@@ -532,7 +532,7 @@ class LineChartPainter extends AxisChartPainter {
         y -= tp.height / 2;
         tp.paint(canvas, Offset(x, y));
 
-        verticalSeek += data.gridData.verticalInterval;
+        verticalSeek += rightTitles.interval;
       }
     }
 
@@ -558,7 +558,7 @@ class LineChartPainter extends AxisChartPainter {
 
         tp.paint(canvas, Offset(x, y));
 
-        horizontalSeek += data.gridData.horizontalInterval;
+        horizontalSeek += bottomTitles.interval;
       }
     }
   }
diff --git a/repo_files/documentations/base_chart.md b/repo_files/documentations/base_chart.md
index 3c56c4885..b9426f8f4 100644
--- a/repo_files/documentations/base_chart.md
+++ b/repo_files/documentations/base_chart.md
@@ -29,6 +29,7 @@
 |reservedSize| a reserved space to show titles|22|
 |textStyle| [TextStyle](https://api.flutter.dev/flutter/painting/TextStyle-class.html) to determine the style of texts |TextStyle(color: Colors.black, fontSize: 11)|
 |margin| margin of horizontal the titles | 6|
+|interval| interval between of showing titles in this side,  | 1.0 |