From a23f08d5c33da938c758728bda20c79a57c76ab9 Mon Sep 17 00:00:00 2001
From: Rasmus Luha <rasmus.luha@gmail.com>
Date: Sat, 7 Jan 2023 20:15:49 +0200
Subject: Tsark, rolliValik, Map update

---
 rannak/kaart/js/kaart.js | 71 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

(limited to 'rannak/kaart/js/kaart.js')

diff --git a/rannak/kaart/js/kaart.js b/rannak/kaart/js/kaart.js
index 4bb0afe..f0921b5 100644
--- a/rannak/kaart/js/kaart.js
+++ b/rannak/kaart/js/kaart.js
@@ -1,3 +1,74 @@
+// ******************** Zoom Stuff **************************** //
+
+const svg = document.querySelector("svg");
+
+const getTransformParameters = (element) => {
+  const transform = element.style.transform;
+  let scale = 1, x = 0, y = 0;
+
+  if (transform.includes("scale"))
+    scale = parseFloat(transform.slice(transform.indexOf("scale") + 6));
+  if (transform.includes("translateX"))
+    x = parseInt(transform.slice(transform.indexOf("translateX") + 11));
+  if (transform.includes("translateY"))
+    y = parseInt(transform.slice(transform.indexOf("translateY") + 11));
+
+  return { scale, x, y };
+};
+
+
+const getTransformString = (scale, x, y) =>
+  "scale(" + scale + ") " + "translateX(" + x + "%) translateY(" + y + "%)";
+
+
+// Pan and Zoom funcs
+
+const pan = (direction) => {
+  const { scale, x, y } = getTransformParameters(svg);
+  let dx = 0, dy = 0;
+
+  switch (direction) {
+    case "left":
+      dx = 3;
+      break;
+    case "right":
+      dx = -3;
+      break;
+    case "up":
+      dy = 3;
+      break;
+    case "down":
+      dy = -3;
+      break;
+  }
+
+  svg.style.transform = getTransformString(scale, x + dx, y + dy);
+};
+
+
+const zoom = (direction) => {
+  const { scale, x, y } = getTransformParameters(svg);
+  let dScale = 0.1;
+  if (direction == "out") dScale *= -1;
+  if (scale == 0.1 && direction == "out") dScale = 0;
+  svg.style.transform = getTransformString(scale + dScale, x, y);
+};
+
+
+// Event Listeners
+
+document.getElementById("left-button").onclick = () => pan("left");
+document.getElementById("right-button").onclick = () => pan("right");
+document.getElementById("up-button").onclick = () => pan("up");
+document.getElementById("down-button").onclick = () => pan("down");
+
+document.getElementById("zoom-in-button").onclick = () => zoom("in");
+document.getElementById("zoom-out-button").onclick = () => zoom("out");
+
+
+
+// ******************** Other Stuff **************************** //
+
 const riigid = document.querySelectorAll("svg path")
 
 // Praegu Eesti, Portugal, Holland
-- 
cgit v1.2.3