Prepare frontend repository for monorepo

This change prepares the frontend Git repository for the monorepo
residing at https://github.com/atlarge-research.com/opendc. To
accomodate for this, we move all files into a frontend subdirectory.

1 files changed, 52 insertions, 0 deletions

diff --git a/frontend/src/components/app/map/elements/TilePlusIcon.js b/frontend/src/components/app/map/elements/TilePlusIcon.js
new file mode 100644
index 00000000..06377152
--- /dev/null
+++ b/frontend/src/components/app/map/elements/TilePlusIcon.js
@@ -0,0 +1,52 @@
+import PropTypes from "prop-types";
+import React from "react";
+import { Group, Line } from "react-konva";
+import { TILE_PLUS_COLOR } from "../../../../util/colors";
+import {
+  TILE_PLUS_MARGIN_IN_PIXELS,
+  TILE_PLUS_WIDTH_IN_PIXELS,
+  TILE_SIZE_IN_PIXELS
+} from "../MapConstants";
+
+const TilePlusIcon = ({ pixelX, pixelY, mapScale }) => {
+  const linePoints = [
+    [
+      pixelX + 0.5 * TILE_SIZE_IN_PIXELS * mapScale,
+      pixelY + TILE_PLUS_MARGIN_IN_PIXELS * mapScale,
+      pixelX + 0.5 * TILE_SIZE_IN_PIXELS * mapScale,
+      pixelY +
+        TILE_SIZE_IN_PIXELS * mapScale -
+        TILE_PLUS_MARGIN_IN_PIXELS * mapScale
+    ],
+    [
+      pixelX + TILE_PLUS_MARGIN_IN_PIXELS * mapScale,
+      pixelY + 0.5 * TILE_SIZE_IN_PIXELS * mapScale,
+      pixelX +
+        TILE_SIZE_IN_PIXELS * mapScale -
+        TILE_PLUS_MARGIN_IN_PIXELS * mapScale,
+      pixelY + 0.5 * TILE_SIZE_IN_PIXELS * mapScale
+    ]
+  ];
+  return (
+    <Group>
+      {linePoints.map((points, index) => (
+        <Line
+          key={index}
+          points={points}
+          lineCap="round"
+          stroke={TILE_PLUS_COLOR}
+          strokeWidth={TILE_PLUS_WIDTH_IN_PIXELS * mapScale}
+          listening={false}
+        />
+      ))}
+    </Group>
+  );
+};
+
+TilePlusIcon.propTypes = {
+  pixelX: PropTypes.number,
+  pixelY: PropTypes.number,
+  mapScale: PropTypes.number
+};
+
+export default TilePlusIcon;