From b4c7b92facbbd6fb8617d0970440db0f953b72c2 Mon Sep 17 00:00:00 2001
From: David Sansome <davidsansome@gmail.com>
Date: Fri, 15 Jan 2010 16:36:34 +0000
Subject: [PATCH] Don't lazy populate all the children of library items

---
 TODO            | 1 -
 src/library.cpp | 8 ++++++++
 src/library.h   | 1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/TODO b/TODO
index 923292aca..4651128f8 100644
--- a/TODO
+++ b/TODO
@@ -5,7 +5,6 @@
 - Copy to library, move to library
 - Edit tags in the playlist
 - Global shortcut keys
-- Make QSortFilterProxyModel on the library obey hasChildren()
 - Database versioning
 - Clicking play plays selected item
 
diff --git a/src/library.cpp b/src/library.cpp
index 80b3a1a0a..4fb0715a4 100644
--- a/src/library.cpp
+++ b/src/library.cpp
@@ -502,3 +502,11 @@ void Library::SetFilterText(const QString& text) {
   query_options_.filter = text;
   Reset();
 }
+
+bool Library::canFetchMore(const QModelIndex &parent) const {
+  if (!parent.isValid())
+    return false;
+
+  LibraryItem* item = IndexToItem(parent);
+  return !item->lazy_loaded;
+}
diff --git a/src/library.h b/src/library.h
index 82edc470b..3c19bf1d6 100644
--- a/src/library.h
+++ b/src/library.h
@@ -39,6 +39,7 @@ class Library : public SimpleTreeModel<LibraryItem> {
   Qt::ItemFlags flags(const QModelIndex& index) const;
   QStringList mimeTypes() const;
   QMimeData* mimeData(const QModelIndexList& indexes) const;
+  bool canFetchMore(const QModelIndex &parent) const;
 
  signals:
   void Error(const QString& message);