fix: static line if values are the same (margelo#29)

chrispader · Jul 7, 2022 · d71ca3a · d71ca3a
1 parent df0b8b2
commit d71ca3a
Showing 1 changed file with 7 additions and 4 deletions.
diff --git a/src/CreateGraphPath.ts b/src/CreateGraphPath.ts
@@ -40,17 +40,20 @@ export function createGraphPath({
     Number.MAX_SAFE_INTEGER
   )
 
+  const areValuesSame = minValue === maxValue
+
   const points: SkPoint[] = []
 
   for (let pixel = 0; pixel < width; pixel += PIXEL_RATIO) {
     const index = Math.floor((pixel / width) * graphData.length)
     const value = graphData[index]?.value ?? minValue
 
     const x = (pixel / width) * (width - 2 * graphPadding) + graphPadding
-    const y =
-      height -
-      ((value - minValue) / (maxValue - minValue)) * innerHeight -
-      graphPadding
+    const y = areValuesSame
+      ? height / 2
+      : height -
+        ((value - minValue) / (maxValue - minValue)) * innerHeight -
+        graphPadding
 
     points.push({ x: x, y: y })
   }