prettifying

app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt

@@ -39,9 +39,9 @@ fun distanceString(targetMeters: Int): AnnotatedString {
         withStyle(ParagraphStyle(textAlign = TextAlign.Center)) {
             withStyle(SpanStyle(color = Color.White)) {
                 val text = if (targetMeters >= 100000)
-                    "${targetMeters / 1000}km"
+                    "↔${targetMeters / 1000}km"
                 else
-                    "${targetMeters}m"
+                    "↔${targetMeters}m"
                 append(text)
             }
         }
@@ -222,13 +222,12 @@ fun MapCanvas(
                 end = Offset(halvedX, halvedY)
             )
 
-
             val startHeight = KhmParser.getHeight(pointLon, pointLat, ctx)
             if (pointOffsetX >= 0 && pointOffsetY >= 0 && pointOffsetX < size.width && pointOffsetY < size.height)
                 drawText(
                     textMeasurer = textMeasurer,
                     text = buildAnnotatedString { withStyle(SpanStyle(color = Color.White)) {
-                        append("${startHeight}m")
+                        append("↑${startHeight}m")
                     } },
                     topLeft = Offset(pointOffsetX, pointOffsetY - 32)
                 )
@@ -268,7 +267,7 @@ fun MapCanvas(
                 text = distanceString(lineMeters),
                 size = Size(160F, 48F),
                 topLeft = Offset(
-                    halvedX,
+                    halvedX - 80F,
                     halvedY - 80F
                 )
             )
@@ -291,15 +290,19 @@ fun MapCanvas(
             style = Stroke(width = 6F)
         )
         // Height under cursor
-        drawText(
-            textMeasurer = textMeasurer,
-            text = buildAnnotatedString {
-                withStyle(SpanStyle(color = Color.White)) {
-                    append("${KhmParser.getHeight(lon, lat, ctx)}m")
-                }
-            },
-            topLeft = Offset(halvedX + crossRadius, halvedY + crossRadius)
-        )
+        KhmParser.getHeight(lon, lat, ctx).let {
+            if (it < 1u) return@let
+            drawText(
+                textMeasurer = textMeasurer,
+                text = buildAnnotatedString {
+                    withStyle(SpanStyle(color = Color.White)) {
+                        append("↑${it}m")
+                    }
+                },
+                topLeft = Offset(halvedX, halvedY + crossRadius)
+            )
+        }
+
 
         // Info box
         drawRect(
@@ -307,7 +310,6 @@ fun MapCanvas(
             size = latLonSize,
             topLeft = latLonOffset
         )
-
         // Info box content
         drawText(
             textMeasurer = textMeasurer,
@@ -336,14 +338,12 @@ fun MapCanvas(
             relativeLineTo(-2F * targetPixels.toFloat(), 0F)
             close()
         }
-
         // Distance measurer
         drawPath(
             measurerPath,
             Color.White,
             style = Stroke(width = 6F)
         )
-
         // Distance measurer text
         drawText(
             textMeasurer = textMeasurer,