[longomatch] Implement zooming in the timeline with the scale

[Andoni Morales Alastruey <amorales src gnome org>]

commit 5ce6c5cdf8ab6c805acf1c7ac76a4ed9b6c728ed
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Tue May 20 21:21:34 2014 +0200

    Implement zooming in the timeline with the scale

 LongoMatch.GUI/Gui/Component/Timeline.cs |   24 +++++++++++++++++++++++-
 1 files changed, 23 insertions(+), 1 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/Timeline.cs b/LongoMatch.GUI/Gui/Component/Timeline.cs
index db66d86..904a569 100644
--- a/LongoMatch.GUI/Gui/Component/Timeline.cs
+++ b/LongoMatch.GUI/Gui/Component/Timeline.cs
@@ -57,6 +57,9 @@ namespace LongoMatch.Gui.Component
                        this.labels = new CategoriesLabels (new WidgetWrapper (labelsarea));
                        focusbutton.CanFocus = false;
                        focusscale.CanFocus = false;
+                       focusscale.Adjustment.Lower = 0;
+                       focusscale.Adjustment.Upper = 16;
+                       focusscale.ValueChanged += HandleValueChanged;
                        timerulearea.HeightRequest = TIMERULE_HEIGHT;
                        labelsarea.WidthRequest = LongoMatch.Drawing.Common.CATEGORY_WIDTH;
                        hbox1.HeightRequest = TIMERULE_HEIGHT;
@@ -90,6 +93,7 @@ namespace LongoMatch.Gui.Component
                                return;
                        }
                        
+                       focusscale.Value = 10;
                        timerule.Duration = new Time ((int)project.Description.File.Length);
                        labels.Project = project;
 
@@ -109,7 +113,7 @@ namespace LongoMatch.Gui.Component
                        QueueDraw ();
                }
                
-               protected virtual void HandleScrollEvent(object sender, System.EventArgs args)
+               void HandleScrollEvent(object sender, System.EventArgs args)
                {
                        if(sender == scrolledwindow1.Vadjustment)
                                labels.Scroll = scrolledwindow1.Vadjustment.Value;
@@ -118,6 +122,24 @@ namespace LongoMatch.Gui.Component
                        QueueDraw ();
                }
 
+               void HandleValueChanged (object sender, EventArgs e)
+               {
+                       double secondsPer100Pixels, value;
+                       
+                       value = Math.Round (focusscale.Value);
+                       if (value == 0) {
+                               secondsPer100Pixels = 1;
+                       } else if (value <= 6) {
+                               secondsPer100Pixels = value * 10;
+                       } else {
+                               secondsPer100Pixels = (value - 5) * 60;
+                       }
+
+                       timerule.SecondsPerPixel = secondsPer100Pixels / 100 ;
+                       timeline.SecondsPerPixel = secondsPer100Pixels / 100;
+                       QueueDraw ();
+               }
+               
                void HandleShowMenu (List<Play> plays, Category cat, Time time)
                {
                        Menu menu;