From 3a3545ac93e0b310dfb6c6da5f83df1f26dff8a6 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Wed, 15 Jun 2016 07:48:05 +0200
Subject: Automatically fetch children if necessary.

Otherwise a treeview doesn't show the expander until you click on the
item (which triggers fetchMore).
---
 common/modelresult.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'common')

diff --git a/common/modelresult.cpp b/common/modelresult.cpp
index d13f867..9f3e662 100644
--- a/common/modelresult.cpp
+++ b/common/modelresult.cpp
@@ -155,6 +155,13 @@ bool ModelResult<T, Ptr>::hasChildren(const QModelIndex &parent) const
     if (mQuery.parentProperty.isEmpty() && parent.isValid()) {
         return false;
     }
+    //Figure out whether we have children
+    if (canFetchMore(parent)) {
+        //Since we don't retrieve that information as part of the entity,
+        //we have to query for the children to see if we have some
+        auto p = const_cast<ModelResult<T, Ptr>*>(this);
+        p->fetchMore(parent);
+    }
     return QAbstractItemModel::hasChildren(parent);
 }
 
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