From 75dad873769f03af596386d795db439bd5f75a45 Mon Sep 17 00:00:00 2001
From: Lawrence Lee <lawrence.lee@foxmail.com>
Date: Thu, 27 Apr 2017 15:20:11 +0800
Subject: [PATCH] add listener on Tree: on-toggle-expand

---
 src/components/tree/node.vue | 1 +
 src/components/tree/tree.vue | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/components/tree/node.vue b/src/components/tree/node.vue
index b401ce57..4c7be821 100644
--- a/src/components/tree/node.vue
+++ b/src/components/tree/node.vue
@@ -98,6 +98,7 @@
             handleExpand () {
                 if (this.data.disabled) return;
                 this.$set(this.data, 'expand', !this.data.expand);
+                this.dispatch('Tree', 'toggle-expand', this.data);
             },
             handleSelect () {
                 if (this.data.disabled) return;
diff --git a/src/components/tree/tree.vue b/src/components/tree/tree.vue
index 6f708b72..c0f7e968 100644
--- a/src/components/tree/tree.vue
+++ b/src/components/tree/tree.vue
@@ -102,7 +102,6 @@
         },
         mounted () {
             this.updateData();
-
             this.$on('selected', ori => {
                 const nodes = findComponentsDownward(this, 'TreeNode');
                 nodes.forEach(node => {
@@ -119,6 +118,9 @@
             this.$on('on-checked', () => {
                 this.$emit('on-check-change', this.getCheckedNodes());
             });
+            this.$on('toggle-expand', (payload) => {
+                this.$emit('on-toggle-expand', payload);
+            });
         },
         watch: {
             data () {