initial work to add shortcut to toggle legend - generic

public/app/core/components/help/help.ts

@@ -34,6 +34,7 @@ export class HelpCtrl {
         { keys: ['p', 's'], description: 'Open Panel Share Modal' },
         { keys: ['p', 'd'], description: 'Duplicate Panel' },
         { keys: ['p', 'r'], description: 'Remove Panel' },
+        { keys: ['p', 'l'], description: 'Toggle panel legend' },
       ],
       'Time Range': [
         { keys: ['t', 'z'], description: 'Zoom out time range' },

public/app/core/services/keybindingSrv.ts

@@ -242,6 +242,18 @@ export class KeybindingSrv {
       }
     });
 
+    // toggle panel legend
+    this.bind('p l', () => {
+      if (dashboard.meta.focusPanelId) {
+        const panelInfo = dashboard.getPanelInfoById(dashboard.meta.focusPanelId);
+        if (panelInfo.panel.legend) {
+          const panelRef = dashboard.getPanelById(dashboard.meta.focusPanelId);
+          panelRef.legend.show = !panelRef.legend.show;
+          panelRef.refresh();
+        }
+      }
+    });
+
     // collapse all rows
     this.bind('d shift+c', () => {
       dashboard.collapseRows();

public/app/plugins/panel/graph/module.ts

@@ -147,7 +147,7 @@ class GraphCtrl extends MetricsPanelCtrl {
 
   onInitPanelActions(actions) {
     actions.push({ text: 'Export CSV', click: 'ctrl.exportCsv()' });
-    actions.push({ text: 'Toggle legend', click: 'ctrl.toggleLegend()' });
+    actions.push({ text: 'Toggle legend', click: 'ctrl.toggleLegend()', shortcut: 'p l' });
   }
 
   issueQueries(datasource) {