From c1aec7f100f4d83ee22d84bde4f8ba4c3cf6c144 Mon Sep 17 00:00:00 2001
From: robxnano <91250-robxnano@users.noreply.gitlab.gnome.org>
Date: Sat, 26 Nov 2022 14:09:40 +0000
Subject: [PATCH] filechoosernativewin32: Set default extension

Setting the default extension before a filter is selected allows
the IFileDialog to automatically change the extension when the
filter is changed. See:
https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-ifiledialog-setdefaultextension
---
 gtk/gtkfilechoosernativewin32.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gtk/gtkfilechoosernativewin32.c b/gtk/gtkfilechoosernativewin32.c
index bec7ca4be3..d2f1769210 100644
--- a/gtk/gtkfilechoosernativewin32.c
+++ b/gtk/gtkfilechoosernativewin32.c
@@ -610,6 +610,10 @@ filechooser_win32_thread (gpointer _data)
       if (FAILED (hr))
         g_warning_hr ("Can't set file types", hr);
 
+      hr = IFileDialog_SetDefaultExtension (pfd, L"");
+      if (FAILED (hr))
+        g_warning_hr ("Can't set default extension", hr);
+
       if (data->self->current_filter)
         {
           GSList *filters = gtk_file_chooser_list_filters (GTK_FILE_CHOOSER (data->self));