init: working version

custom/CustomMouseArea.qml

@@ -0,0 +1,22 @@
+import QtQuick
+
+MouseArea {
+    property int scrollAccumulatedY: 0
+    property int scrollThreshold: 160
+
+    function onWheel(event: WheelEvent): void {
+    }
+
+    onWheel: event => {
+        // Update accumulated scroll
+        if (Math.sign(event.angleDelta.y) !== Math.sign(scrollAccumulatedY))
+            scrollAccumulatedY = 0;
+        scrollAccumulatedY += event.angleDelta.y;
+
+        // Trigger handler and reset if above threshold
+        if (Math.abs(scrollAccumulatedY) >= scrollThreshold) {
+            onWheel(event);
+            scrollAccumulatedY = 0;
+        }
+    }
+}