Grafana 8: Don't croak when unable to load/access KeybindingSrv

Apparently, this service component will have to be addressed differently
on Grafana 8. By now, this update will just ignore / skip anything
related to that, so we only lack a minor feature about disabling
any keyboard navigation.

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 
 ## development
+- Add compatibility with Grafana 8
 
 - Add Makefile to assist in packaging and publishing
 - Overlay image can now be refreshed with the dashboard. Thanks, @jreyesr!

CONTRIBUTING.md

@@ -15,6 +15,9 @@ The easiest way to invoke a development sandbox is by using Docker.
 ```shell
 # Run with Grafana 7
 docker run --publish=3000:3000 --volume=$PWD/dist:/var/lib/grafana/plugins/grafana-map-panel grafana/grafana:7.5.7
+
+# Run with Grafana 8
+docker run --publish=3000:3000 --volume=$PWD/dist:/var/lib/grafana/plugins/grafana-map-panel --env=GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS=grafana-map-panel grafana/grafana:8.0.0
 ```
 
 Because the version of `node-sass` used as transitive dependency is apparently

src/chrome.ts

@@ -62,11 +62,19 @@ export class WorldmapChrome {
      * - https://github.com/daq-tools/grafanimate/blob/0.5.5/grafanimate/grafana-studio.js
      *
      */
-    this.getKeybindingSrv().unbind('esc', 'keydown');
+    try {
+      this.getKeybindingSrv().unbind('esc', 'keydown');
+    } catch (err) {
+      console.error(`Accessing KeybindingSrv not implemented for Grafana 8 yet.\n${err}`);
+    }
   }
 
   restoreEscapeKeyBinding() {
-    this.getKeybindingSrv().setupGlobal();
+    try {
+      this.getKeybindingSrv().setupGlobal();
+    } catch (err) {
+      console.error(`Accessing KeybindingSrv not implemented for Grafana 8 yet.\n${err}`);
+    }
   }
 
   getKeybindingSrv() {

src/worldmap_ctrl.ts

@@ -298,8 +298,10 @@ export default class WorldmapCtrl extends MetricsPanelCtrl {
         this.panel.snapshotLocationData = this.locations;
       }
 
+      console.info('Processing data');
       this.processData(dataList);
 
+      console.info('Updating color mode');
       this.updateColorMode();
 
       const autoCenterMap =
@@ -504,6 +506,8 @@ export default class WorldmapCtrl extends MetricsPanelCtrl {
 
   resetData() {
     this.data = [];
+    this.data.categories = [];
+    this.data.thresholds = [];
     //this.mapCenterMoved = true;
   }