[longomatch] Support non editable FileSet selection.

[Andoni Morales Alastruey <amorales src gnome org>]

commit 5611b461cae0faff2cf9f769a486e8e217e82f75
Author: Julien Moutte <julien fluendo com>
Date:   Fri Mar 6 16:12:04 2015 +0100

    Support non editable FileSet selection.

 .../Gui/Component/MediaFileSetSelection.cs         |   40 ++++++++++++++++++--
 1 files changed, 36 insertions(+), 4 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/MediaFileSetSelection.cs 
b/LongoMatch.GUI/Gui/Component/MediaFileSetSelection.cs
index f0f6205..ebe20c5 100644
--- a/LongoMatch.GUI/Gui/Component/MediaFileSetSelection.cs
+++ b/LongoMatch.GUI/Gui/Component/MediaFileSetSelection.cs
@@ -29,20 +29,30 @@ namespace LongoMatch.Gui.Component
        {
                MediaFileSet fileSet;
                List<MediaFileChooser> fileChoosers;
+               bool editable = true;
 
                public MediaFileSetSelection ()
                {
                        this.Build ();
 
                        fileChoosers = new List<MediaFileChooser> ();
-
-                       // Add the first media file chooser for main camera
-                       AddMediaFileChooser (Catalog.GetString ("Main angle camera"));
                }
 
                public MediaFileSet FileSet {
                        set {
                                fileSet = value;
+
+                               if (fileSet.Count > 0) {
+                                       editable = false;
+
+                                       // Create all choosers
+                                       foreach (MediaFile mf in fileSet) {
+                                               AddMediaFileChooser (mf.Name);
+                                       }
+                               } else {
+                                       // Add the first media file chooser for main camera
+                                       AddMediaFileChooser (Catalog.GetString ("Main camera angle"));
+                               }
                        }
                        get {
                                return fileSet;
@@ -63,8 +73,26 @@ namespace LongoMatch.Gui.Component
                        fileChoosers.Add (chooser);
                }
 
+               /// <summary>
+               /// Here we just map 1 to 1 from the choosers list to our set. We make sure to use Replace 
method on the set
+               /// to preserve important metadata.
+               /// </summary>
                void UpdateFileSet ()
                {
+                       for (var i = 0; i < fileChoosers.Count; i++) {
+                               MediaFile mf = fileChoosers [i].MediaFile;
+                               if (mf != null) {
+                                       fileSet.Replace (fileSet [i], mf);      
+                               }
+                       }
+               }
+
+               /// <summary>
+               /// Editable FileSet will just clear the set and recreate from the choosers. It will also 
figure out
+               /// if some choosers should be removed or added to allow more files to come in.
+               /// </summary>
+               void UpdateEditableFileSet ()
+               {
                        bool have_empty_chooser = false;
                        List<MediaFileChooser> to_remove = new List<MediaFileChooser> ();
 
@@ -98,7 +126,11 @@ namespace LongoMatch.Gui.Component
 
                void HandleFileChangedEvent (object sender, EventArgs e)
                {
-                       UpdateFileSet ();
+                       if (editable) {
+                               UpdateEditableFileSet ();
+                       } else {
+                               UpdateFileSet ();
+                       }
                }
        }
 }