From a019cdd36d10c480ddeb06dac83ae6c932d62532 Mon Sep 17 00:00:00 2001
From: glughi <giovanni.lughi@gmail.com>
Date: Tue, 22 Oct 2024 10:31:21 +0200
Subject: [PATCH] Add Leaflet maxZoom to configParameters

---
 CHANGES.md            | 1 +
 lib/Models/Leaflet.ts | 1 +
 lib/Models/Terria.ts  | 4 ++++
 3 files changed, 6 insertions(+)

diff --git a/CHANGES.md b/CHANGES.md
index f881d02b37..9a2f24446c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,6 +2,7 @@
 
 #### next release (8.7.8)
 
+- Add "leafletMaxZoom" to configParameters so that the maxZoom of the Leaflet viewer can be changed.
 - [The next improvement]
 
 #### 8.7.7 - 2024-10-01
diff --git a/lib/Models/Leaflet.ts b/lib/Models/Leaflet.ts
index f2054cf847..6b411bed05 100644
--- a/lib/Models/Leaflet.ts
+++ b/lib/Models/Leaflet.ts
@@ -103,6 +103,7 @@ export default class Leaflet extends GlobeOrMap {
     clippingRectangle: Rectangle | undefined
   ) => GridLayer = computedFn((ip, clippingRectangle) => {
     const layerOptions = {
+      maxZoom: this.terria.configParameters.leafletMaxZoom,
       bounds: clippingRectangle && rectangleToLatLngBounds(clippingRectangle)
     };
     // We have two different kinds of ImageryProviderLeaflet layers
diff --git a/lib/Models/Terria.ts b/lib/Models/Terria.ts
index 78a510487b..c5ba0caa43 100644
--- a/lib/Models/Terria.ts
+++ b/lib/Models/Terria.ts
@@ -328,6 +328,9 @@ export interface ConfigParameters {
    */
   feedbackMinLength?: number;
 
+  /** If undefined, then Leaflet's default attribution will be used */
+  leafletMaxZoom: number;
+
   /** If undefined, then Leaflet's default attribution will be used */
   leafletAttributionPrefix?: string;
 
@@ -574,6 +577,7 @@ export default class Terria {
     feedbackPreamble: "translate#feedback.feedbackPreamble",
     feedbackPostamble: undefined,
     feedbackMinLength: 0,
+    leafletMaxZoom: 18,
     leafletAttributionPrefix: undefined,
     extraCreditLinks: [
       // Default credit links (shown at the bottom of the Cesium map)