[glom] ImageGlom: Avoid copy/paste of code to clear data.

[Murray Cumming <murrayc src gnome org>]

commit 4b1eebc8778bdba5fd92b6f82e15700474382f9e
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Feb 25 11:04:23 2016 +0100

    ImageGlom: Avoid copy/paste of code to clear data.

 glom/utility_widgets/imageglom.cc |   14 +++++++++-----
 glom/utility_widgets/imageglom.h  |    1 +
 2 files changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/glom/utility_widgets/imageglom.cc b/glom/utility_widgets/imageglom.cc
index 608042d..5374ae8 100644
--- a/glom/utility_widgets/imageglom.cc
+++ b/glom/utility_widgets/imageglom.cc
@@ -236,7 +236,7 @@ void ImageGlom::set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf>& pixbuf)
 void ImageGlom::set_value(const Gnome::Gda::Value& value)
 {
   // Remember original data 
-  m_original_data = Gnome::Gda::Value();
+  clear_original_data();
   m_original_data = value;
   show_image_data();
 }
@@ -818,7 +818,7 @@ void ImageGlom::on_menupopup_activate_select_file()
           bin->data = image_data->data;
           bin->binary_length = image_data->binary_length;
 
-          m_original_data = Gnome::Gda::Value();
+          clear_original_data();
           
           g_value_unset(m_original_data.gobj());
           g_value_init(m_original_data.gobj(), GDA_TYPE_BINARY);
@@ -832,6 +832,11 @@ void ImageGlom::on_menupopup_activate_select_file()
   }
 }
 
+void ImageGlom::clear_original_data()
+{
+  m_original_data = Gnome::Gda::Value();
+}
+
 void ImageGlom::on_clipboard_get(Gtk::SelectionData& selection_data, guint /* info */)
 {
   //info is meant to indicate the target, but it seems to be always 0,
@@ -905,8 +910,7 @@ void ImageGlom::on_clipboard_received_image(const Glib::RefPtr<Gdk::Pixbuf>& pix
 
   if(pixbuf)
   {
-    // Clear original data of previous image
-    m_original_data = Gnome::Gda::Value();
+    clear_original_data();
 
     m_pixbuf_original = pixbuf;
     show_image_data();
@@ -933,7 +937,7 @@ void ImageGlom::on_menupopup_activate_clear()
   if(m_read_only)
     return;
 
-  m_original_data = Gnome::Gda::Value();
+  clear_original_data();
   show_image_data();
   signal_edited().emit();
 }
diff --git a/glom/utility_widgets/imageglom.h b/glom/utility_widgets/imageglom.h
index 13f42b8..6fa2b03 100644
--- a/glom/utility_widgets/imageglom.h
+++ b/glom/utility_widgets/imageglom.h
@@ -68,6 +68,7 @@ private:
   void init();
   void init_widgets(bool use_evince);
   void clear_image_from_widgets();
+  void clear_original_data();
 
   void on_size_allocate(Gtk::Allocation& allocation) override;