Refactoring, various fixes

js/input/mouse/Zoom.js

@@ -2,9 +2,27 @@ import IMouseWheel from "./IMouseWheel"
 
 export default class Zoom extends IMouseWheel {
 
+    #enableZoonIn = false
+
+    get enableZoonIn() {
+        return this.#enableZoonIn
+    }
+
+    set enableZoonIn(value) {
+        value = Boolean(value)
+        if (value == this.#enableZoonIn) {
+            return
+        }
+        this.#enableZoonIn = value
+    }
+
     wheel(variation, location) {
         let zoomLevel = this.blueprint.getZoom()
-        zoomLevel -= variation
+        variation = -variation
+        if (!this.enableZoonIn && zoomLevel == 0 && variation > 0) {
+            return
+        }
+        zoomLevel += variation
         this.blueprint.setZoom(zoomLevel, location)
     }
 }