[longomatch] Change selection API to support removals

[Andoni Morales Alastruey <amorales src gnome org>]

commit 13b85709369e37db5168483392b84b52e6f49577
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Tue May 27 18:46:49 2014 +0200

    Change selection API to support removals

 LongoMatch.Drawing/Canvas.cs                |   19 +++++--------------
 LongoMatch.Drawing/Widgets/PlaysTimeline.cs |   10 ++++++----
 2 files changed, 11 insertions(+), 18 deletions(-)
---
diff --git a/LongoMatch.Drawing/Canvas.cs b/LongoMatch.Drawing/Canvas.cs
index 0dc7839..35bb27a 100644
--- a/LongoMatch.Drawing/Canvas.cs
+++ b/LongoMatch.Drawing/Canvas.cs
@@ -44,16 +44,6 @@ namespace LongoMatch.Drawing
                        set;
                }
                
-               public double Width {
-                       get;
-                       set;
-               }
-               
-               public double Height {
-                       get;
-                       set;
-               }
-               
                protected virtual void HandleDraw (object context, Area area) {
                        tk.Context = context;
                        for (int i=Objects.Count - 1; i >= 0; i--) {
@@ -99,10 +89,10 @@ namespace LongoMatch.Drawing
                protected abstract void StartMove (Selection sel);
                protected abstract void SelectionMoved (Selection sel);
                protected abstract void StopMove ();
-               protected abstract void ItemSelected (Selection sel);
+               protected abstract void SelectionChanged (List<Selection> sel);
                protected abstract void ShowMenu (Point coords);
                
-               void ClearSelection () {
+               public void ClearSelection () {
                        foreach (Selection sel in Selections) {
                                ICanvasSelectableObject po = sel.Drawable as ICanvasSelectableObject;
                                po.Selected = false;
@@ -111,17 +101,18 @@ namespace LongoMatch.Drawing
                        Selections.Clear ();
                }
                
-               void UpdateSelection (Selection sel) {
+               protected void UpdateSelection (Selection sel) {
                        ICanvasSelectableObject so = sel.Drawable as ICanvasSelectableObject;
                        Selection seldup = Selections.FirstOrDefault (s => s.Drawable == sel.Drawable);
                        
                        if (seldup != null) {
                                so.Selected = false;
                                Selections.Remove (seldup);
+                               SelectionChanged (Selections);
                        } else {
                                so.Selected = true;
                                Selections.Add (sel);
-                               ItemSelected (sel);
+                               SelectionChanged (Selections);
                        }
                        widget.ReDraw (so);
                }
diff --git a/LongoMatch.Drawing/Widgets/PlaysTimeline.cs b/LongoMatch.Drawing/Widgets/PlaysTimeline.cs
index b294f0c..be3715f 100644
--- a/LongoMatch.Drawing/Widgets/PlaysTimeline.cs
+++ b/LongoMatch.Drawing/Widgets/PlaysTimeline.cs
@@ -148,10 +148,12 @@ namespace LongoMatch.Drawing.Widgets
                        widget.ReDraw (categories[po.Play.Category]);
                }               
                
-               protected override void ItemSelected (Selection sel) {
-                       PlayObject po = sel.Drawable as PlayObject;
-                       if (TimeNodeSelected != null) {
-                               TimeNodeSelected (po.Play);
+               protected override void SelectionChanged (List<Selection> selections) {
+                       if (selections.Count > 0) {
+                               PlayObject po = selections.Last().Drawable as PlayObject;
+                               if (TimeNodeSelected != null) {
+                                       TimeNodeSelected (po.Play);
+                               }
                        }
                }