options: support deferred writes when saving bundles

The mapping window has 13 bundles total in use. Setting them all can take up
to a large fraction of a second on some windows filesystems. Do a single
config write instead.

1 files changed, 7 insertions, 2 deletions

diff --git a/options/bundle.cpp b/options/bundle.cpp
index a60810c5..fa1a214c 100644
--- a/options/bundle.cpp
+++ b/options/bundle.cpp
@@ -37,7 +37,7 @@ bool bundle::contains(const QString &name) const
     return transient.contains(name);
 }
 
-void bundle::save()
+void bundle::save_deferred(QSettings& s)
 {
     if (group_name == "")
         return;
@@ -51,7 +51,7 @@ void bundle::save()
             qDebug() << "bundle" << group_name << "changed, saving";
             modified_ = true;
             saved = transient;
-            saved.save();
+            saved.save_deferred(s);
         }
     }
 
@@ -59,6 +59,11 @@ void bundle::save()
         emit saving();
 }
 
+void bundle::save()
+{
+    save_deferred(*group::ini_file());
+}
+
 bool bundle::modifiedp() const // XXX unused
 {
     QMutexLocker l(const_cast<QMutex*>(&mtx));