From 0702d13263bf501c1db074ce1544e60b95161210 Mon Sep 17 00:00:00 2001
From: "bozo.kopic" <bozo@kopic.xyz>
Date: Sun, 7 Nov 2021 15:52:44 +0100
Subject: major rewrite

---
 src_js/dragger.js | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 src_js/dragger.js

(limited to 'src_js/dragger.js')

diff --git a/src_js/dragger.js b/src_js/dragger.js
new file mode 100644
index 0000000..e591be6
--- /dev/null
+++ b/src_js/dragger.js
@@ -0,0 +1,28 @@
+
+
+const draggers = [];
+
+
+export function mouseDownHandler(createMoveHandlerCb) {
+    return evt => {
+        draggers.push({
+            initX: evt.screenX,
+            initY: evt.screenY,
+            moveHandler: createMoveHandlerCb(evt)
+        });
+    };
+}
+
+
+document.addEventListener('mousemove', evt => {
+    for (let dragger of draggers) {
+        const dx = evt.screenX - dragger.initX;
+        const dy = evt.screenY - dragger.initY;
+        dragger.moveHandler(evt, dx, dy);
+    }
+});
+
+
+document.addEventListener('mouseup', evt => {
+    draggers.splice(0);
+});
-- 
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