fix: Add missing utils file

charts/src/main/java/com/dzeio/charts/utils/CanvasUtils.kt

@@ -0,0 +1,49 @@
+package com.dzeio.charts.utils
+
+import android.graphics.Canvas
+import android.graphics.Paint
+import kotlin.math.sqrt
+
+fun Canvas.drawDottedLine(
+    startX: Float,
+    startY: Float,
+    endX: Float,
+    endY: Float,
+    spacing: Float,
+    paint: Paint
+) {
+    //calculate line length
+    val length = if (endX - startX == 0f) {
+        // just length of Y
+        endY - startY
+    } else if (endY - startY == 0f) {
+        // just length of X
+        endX - startX
+    } else {
+        // calculate using the Pythagorean theorem
+        sqrt((startX + endX) * (startX + endX) + (startY + endY) * (startY + endY))
+    }
+
+    val lineCount = (length / spacing).toInt()
+
+    val lenX = endX - startX
+    val lenY = endY - startY
+
+//    Log.d("DrawDottedLine", "----------- Start -----------")
+//    Log.d("DrawDottedLine", "lenX: $lenX, lenY: $lenY")
+    for (line in 0 until lineCount) {
+        if (line % 2 == 0) {
+            continue
+        }
+
+        val sx = lenX / lineCount * line + startX
+        val sy = lenY / lineCount * line + startY
+        val ex = lenX / lineCount * (line + 1)  + startX
+        val ey = lenY / lineCount * (line + 1)  + startY
+//        Log.d("DrawDottedLine", "$sx, $sy, $ex, $ey")
+        this.drawLine(sx, sy, ex, ey, paint)
+        // line
+        // total line startX, endX, startY, endY
+        // total line length
+    }
+}