From 4a6edc8a0d014c1ed48b27544cce53579b8fbf6d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yi=C4=9Fit=20FINDIKLI?= <yigitfindikli@gmail.com>
Date: Fri, 28 Dec 2018 13:19:41 +0300
Subject: [PATCH] fixed #7047 Multiselect Headercheckbox not working correctly

---
 src/app/components/multiselect/multiselect.ts | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/app/components/multiselect/multiselect.ts b/src/app/components/multiselect/multiselect.ts
index 9e421d7bf28..5e054edadf6 100644
--- a/src/app/components/multiselect/multiselect.ts
+++ b/src/app/components/multiselect/multiselect.ts
@@ -372,7 +372,7 @@ export class MultiSelect implements OnInit,AfterViewInit,AfterContentInit,AfterV
     
     isAllChecked() {
         if (this.filterValue && this.filterValue.trim().length) {
-            return this.value && this.visibleOptions&&this.visibleOptions.length && (this.value.length == this.visibleOptions.length);
+            return this.value && this.visibleOptions&&this.visibleOptions.length && this.isVisibleOptionsAllChecked();
         }
         else {
             let optionCount = this.getEnabledOptionCount();
@@ -381,6 +381,20 @@ export class MultiSelect implements OnInit,AfterViewInit,AfterContentInit,AfterV
         }
     }
 
+    isVisibleOptionsAllChecked() {
+        if (!this.visibleOptions) {
+            return false;
+        }
+        else {
+            for (let option of this.visibleOptions) {
+                if (!this.value.find(value => value == option.value)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+
     getEnabledOptionCount(): number {
         if (this.options) {
             let count = 0;