[gnome-multi-writer] trivial: Detect if the ISO changes

[Richard Hughes <rhughes src gnome org>]

commit ad1c730122165fa549a50cc4f6386a91bd011db2
Author: Richard Hughes <richard hughsie com>
Date:   Tue Jan 27 15:21:06 2015 +0000

    trivial: Detect if the ISO changes
    
    We don't actually do anything with this information yet.

 src/gmw-main.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)
---
diff --git a/src/gmw-main.c b/src/gmw-main.c
index 0a4b687..396cf79 100644
--- a/src/gmw-main.c
+++ b/src/gmw-main.c
@@ -43,6 +43,7 @@ typedef struct {
 
 typedef struct {
        GFile                   *image_file;
+       GFileMonitor            *image_monitor;
        guint64                  image_file_size;
        gboolean                 rename_labels;
        GPtrArray               *devices;
@@ -939,6 +940,19 @@ gmw_update_title (GmwPrivate *priv)
 }
 
 /**
+ * gmw_set_image_file_changed_cb:
+ **/
+static void
+gmw_set_image_file_changed_cb (GFileMonitor *monitor,
+                              GFile *file,
+                              GFile *other_file,
+                              GFileMonitorEvent event_type,
+                              GmwPrivate *priv)
+{
+       g_debug ("ISO file changed");
+}
+
+/**
  * gmw_set_image_filename:
  **/
 static void
@@ -949,7 +963,19 @@ gmw_set_image_filename (GmwPrivate *priv, const gchar *filename)
 
        if (priv->image_file != NULL)
                g_object_unref (priv->image_file);
+       if (priv->image_monitor != NULL)
+               g_object_unref (priv->image_monitor);
        priv->image_file = g_file_new_for_path (filename);
+       priv->image_monitor = g_file_monitor (priv->image_file,
+                                             G_FILE_MONITOR_NONE,
+                                             NULL, &error);
+       if (priv->image_monitor == NULL) {
+               /* TRANSLATORS: we couldn't open the ISO file the user chose */
+               gmw_error_dialog (priv, _("Failed to open"), error->message);
+               return;
+       }
+       g_signal_connect (priv->image_monitor, "changed",
+                         G_CALLBACK (gmw_set_image_file_changed_cb), priv);
 
        /* get the size of the ISO file */
        info = g_file_query_info (priv->image_file,
@@ -1824,6 +1850,8 @@ out:
                        g_object_unref (priv->usb_ctx);
                if (priv->image_file != NULL)
                        g_object_unref (priv->image_file);
+               if (priv->image_monitor != NULL)
+                       g_object_unref (priv->image_monitor);
                if (priv->cancellable != NULL)
                        g_object_unref (priv->cancellable);
                if (priv->application != NULL)