Limit the thickness of spans in the minimap

Signed-off-by: Ruben Vargas <ruben.vp8510@gmail.com>
jaegertracing · Apr 17, 2019 · db03666 · db03666
1 parent 5f40765
commit db03666
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/packages/jaeger-ui/src/components/TracePage/TracePageHeader/SpanGraph/render-into-canvas.tsx b/packages/jaeger-ui/src/components/TracePage/TracePageHeader/SpanGraph/render-into-canvas.tsx
@@ -21,6 +21,7 @@ export const MIN_ITEM_HEIGHT = 2;
 export const MAX_TOTAL_HEIGHT = 200;
 export const MIN_ITEM_WIDTH = 10;
 export const MIN_TOTAL_HEIGHT = 60;
+const MAX_ITEM_HEIGHT = 6;
 
 export default function renderIntoCanvas(
   canvas: HTMLCanvasElement,
@@ -36,7 +37,9 @@ export default function renderIntoCanvas(
   canvas.width = cWidth;
   // eslint-disable-next-line no-param-reassign
   canvas.height = cHeight;
-  const itemHeight = Math.max(MIN_ITEM_HEIGHT, cHeight / items.length);
+  const computedItemHeight = Math.max(MIN_ITEM_HEIGHT, cHeight / items.length);
+  const itemHeight = computedItemHeight > MAX_ITEM_HEIGHT? MAX_ITEM_HEIGHT : computedItemHeight;
+
   const itemYChange = cHeight / items.length;
 
   const ctx = canvas.getContext('2d', { alpha: false }) as CanvasRenderingContext2D;