[longomatch] Add default implementation instead of using an abstract class

[Andoni Morales Alastruey <amorales src gnome org>]

commit 7cb2d291e52c6db802af08a16a835506f4b04a6c
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Tue Jun 17 18:50:05 2014 +0200

    Add default implementation instead of using an abstract class

 LongoMatch.Drawing/Canvas.cs |   28 ++++++++++++++++++++--------
 1 files changed, 20 insertions(+), 8 deletions(-)
---
diff --git a/LongoMatch.Drawing/Canvas.cs b/LongoMatch.Drawing/Canvas.cs
index 8806822..f425c2d 100644
--- a/LongoMatch.Drawing/Canvas.cs
+++ b/LongoMatch.Drawing/Canvas.cs
@@ -70,7 +70,7 @@ namespace LongoMatch.Drawing
                }
        }
        
-       public abstract class SelectionCanvas: Canvas
+       public class SelectionCanvas: Canvas
        {
                protected bool moving;
                protected Point start; 
@@ -79,6 +79,7 @@ namespace LongoMatch.Drawing
                public SelectionCanvas (IWidget widget): base (widget) {
                        Selections = new List<Selection>();
                        SelectionMode = MultiSelectionMode.Single;
+                       Accuracy = 1;
                        
                        widget.ButtonPressEvent += HandleButtonPressEvent;
                        widget.ButtonReleasedEvent += HandleButtonReleasedEvent;
@@ -100,11 +101,20 @@ namespace LongoMatch.Drawing
                        set;
                }
                
-               protected abstract void StartMove (Selection sel);
-               protected abstract void SelectionMoved (Selection sel);
-               protected abstract void StopMove ();
-               protected abstract void SelectionChanged (List<Selection> sel);
-               protected abstract void ShowMenu (Point coords);
+               protected virtual void StartMove (Selection sel) {
+               }
+               
+               protected virtual void SelectionMoved (Selection sel) {
+               }
+               
+               protected virtual void StopMove () {
+               }
+               
+               protected virtual void SelectionChanged (List<Selection> sel) {
+               }
+               
+               protected virtual void ShowMenu (Point coords) {
+               }
                
                public void ClearSelection () {
                        foreach (Selection sel in Selections) {
@@ -131,7 +141,7 @@ namespace LongoMatch.Drawing
                        widget.ReDraw (so);
                }
                
-               protected virtual void HandleLeftButton (Point coords, ButtonModifier modif) {
+               void HandleLeftButton (Point coords, ButtonModifier modif) {
                        Selection sel = null;
 
                        foreach (object o in Objects) {
@@ -163,7 +173,7 @@ namespace LongoMatch.Drawing
                        }
                }
                
-               protected virtual void HandleRightButton (Point coords, ButtonModifier modif) {
+               void HandleRightButton (Point coords, ButtonModifier modif) {
                        ShowMenu (coords);
                }
                
@@ -174,6 +184,7 @@ namespace LongoMatch.Drawing
                        if (!moving)
                                return;
                        
+                       coords = ToUserCoords (coords); 
                        sel = Selections[0];
                        sel.Drawable.Move (sel, coords, start);  
                        widget.ReDraw (sel.Drawable);
@@ -192,6 +203,7 @@ namespace LongoMatch.Drawing
                        if (time - lastTime < 500) {
                                return;
                        }
+                       coords = ToUserCoords (coords); 
                        if (type == ButtonType.Left) {
                                HandleLeftButton (coords, modifier);
                        } else if (type == ButtonType.Right) {