From 99c754c4a542ae79b19cf5b7799afe586d64625b Mon Sep 17 00:00:00 2001
From: r66ad <r66ad@gmx.de>
Date: Thu, 9 May 2019 07:51:14 +0200
Subject: [PATCH] Templating: Support selecting all filtered values of
 multi-value variable (#16873)

* Closes #15821

* sorry, now prettier

* select and deselect on filtered values works with Selected option now. Should the clearSelections function rather be renamed to selectOrClearValues? Selected should have another name too.
---
 public/app/core/directives/value_select_dropdown.ts | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/public/app/core/directives/value_select_dropdown.ts b/public/app/core/directives/value_select_dropdown.ts
index 90a4ad64477..48861d9f4a0 100644
--- a/public/app/core/directives/value_select_dropdown.ts
+++ b/public/app/core/directives/value_select_dropdown.ts
@@ -77,10 +77,17 @@ export class ValueSelectDropdownCtrl {
   }
 
   clearSelections() {
-    _.each(this.options, option => {
-      option.selected = false;
-    });
+    this.selectedValues = _.filter(this.options, { selected: true });
 
+    if (this.selectedValues.length > 1) {
+      _.each(this.options, option => {
+        option.selected = false;
+      });
+    } else {
+      _.each(this.search.options, option => {
+        option.selected = true;
+      });
+    }
     this.selectionsChanged(false);
   }