Fix LineChart width smaller width or height lower than 40, #869, #857.

imaNNeo · Jan 28, 2022 · 1d7a2d3 · 1d7a2d3
1 parent 4d270fb
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## newVersion
 * **BUGFIX** Fix PieChart changing sections issue (we have disabled semantics for pieChart badgeWidgets), #861.
+* **BUGFIX** Fix LineChart width smaller width or height lower than 40, #869, #857.
 
 ## 0.41.0
 * **BUGFIX** Fix getNearestTouchedSpot. Previously it returned the first occurrence of a spot within the threshold, and not the nearest, #641, #645.

diff --git a/lib/src/utils/utils.dart b/lib/src/utils/utils.dart
@@ -128,7 +128,7 @@ class Utils {
   /// 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 5000, 10000,...
   double getEfficientInterval(double axisViewSize, double diffInYAxis,
       {double pixelPerInterval = 40}) {
-    final allowedCount = axisViewSize ~/ pixelPerInterval;
+    final allowedCount = math.max(axisViewSize ~/ pixelPerInterval, 1);
     final accurateInterval = diffInYAxis / allowedCount;
     return roundInterval(accurateInterval);
   }

diff --git a/test/utils/utils_test.dart b/test/utils/utils_test.dart
@@ -133,6 +133,7 @@ void main() {
     expect(Utils().getEfficientInterval(200, 0.5, pixelPerInterval: 20), 0.05);
     expect(Utils().getEfficientInterval(200, 1.0, pixelPerInterval: 20), 0.1);
     expect(Utils().getEfficientInterval(100, 0.5, pixelPerInterval: 20), 0.1);
+    expect(Utils().getEfficientInterval(10, 10), 10);
   });
 
   test('test formatNumber', () {