[gtk/widget-factory-filechooser] widget-factory: Add a file chooser

[Matthias Clasen <matthiasc src gnome org>]

commit f050a9e8899fac1a74175f049442ab0f017fe084
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 9 14:28:08 2022 -0400

    widget-factory: Add a file chooser
    
    We don't have a readily accessible file chooser
    in our demo apps. Fix that by making the Open
    menu item on page 2 bring up a file chooser.

 demos/widget-factory/widget-factory.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)
---
diff --git a/demos/widget-factory/widget-factory.c b/demos/widget-factory/widget-factory.c
index 7e30b8b9e8..4ec907d531 100644
--- a/demos/widget-factory/widget-factory.c
+++ b/demos/widget-factory/widget-factory.c
@@ -213,6 +213,31 @@ activate_background (GSimpleAction *action,
   populate_flowbox (flowbox);
 }
 
+static void
+file_chooser_response (GtkNativeDialog *self,
+                       int              response)
+{
+  gtk_native_dialog_destroy (self);
+}
+
+static void
+activate_open_file (GSimpleAction *action,
+                    GVariant      *parameter,
+                    gpointer       user_data)
+{
+  GtkFileChooserNative *chooser;
+
+  chooser = gtk_file_chooser_native_new ("Open file",
+                                         NULL,
+                                         GTK_FILE_CHOOSER_ACTION_OPEN,
+                                         "Open",
+                                         "Cancel");
+
+  g_signal_connect (chooser, "response", G_CALLBACK (file_chooser_response), NULL);
+
+  gtk_native_dialog_show (GTK_NATIVE_DIALOG (chooser));
+}
+
 static void
 activate_open (GSimpleAction *action,
                GVariant      *parameter,
@@ -2451,7 +2476,7 @@ main (int argc, char *argv[])
     { "share", activate_action, NULL, NULL, NULL },
     { "labels", activate_action, NULL, NULL, NULL },
     { "new", activate_action, NULL, NULL, NULL },
-    { "open", activate_action, NULL, NULL, NULL },
+    { "open", activate_open_file, NULL, NULL, NULL },
     { "open-in", activate_action, NULL, NULL, NULL },
     { "open-tab", activate_action, NULL, NULL, NULL },
     { "open-window", activate_action, NULL, NULL, NULL },