[longomatch] Release panels correctly

[Andoni Morales Alastruey <amorales src gnome org>]

commit d143308de1bfab3b935af1d81579842c72a9754e
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Thu Jun 19 14:41:30 2014 +0200

    Release panels correctly

 LongoMatch.GUI/Gui/MainWindow.cs |   31 +++++++++++++++++++------------
 1 files changed, 19 insertions(+), 12 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/MainWindow.cs b/LongoMatch.GUI/Gui/MainWindow.cs
index 9724bd0..49de6bd 100644
--- a/LongoMatch.GUI/Gui/MainWindow.cs
+++ b/LongoMatch.GUI/Gui/MainWindow.cs
@@ -50,6 +50,7 @@ namespace LongoMatch.Gui
                IAnalysisWindow analysisWindow;
                Project openedProject;
                ProjectType projectType;
+               Widget currentPanel;
 
                #region Constructors
                public MainWindow(IGUIToolkit guiToolkit) :
@@ -75,7 +76,6 @@ namespace LongoMatch.Gui
                                       false);
                        screen = Display.Default.DefaultScreen;
                        this.Resize(screen.Width * 80 / 100, screen.Height * 80 / 100);
-                       analysisWindow = new AnalysisComponent();
                }
 
                #endregion
@@ -91,11 +91,8 @@ namespace LongoMatch.Gui
                        if (panel == null) {
                                ResetGUI ();
                        } else {
-                               foreach (Widget widget in centralbox.AllChildren) {
-                                       if (widget != welcomepanel1) {
-                                               centralbox.Remove (widget);
-                                       }
-                               }
+                               RemovePanel ();
+                               currentPanel = panel;
                                panel.Show();
                                if (panel is IPanel) {
                                        (panel as IPanel).BackEvent += ResetGUI;
@@ -139,6 +136,7 @@ namespace LongoMatch.Gui
                                Title = Constants.SOFTWARE_NAME;
                        }
                        MakeActionsSensitive(true, projectType);
+                       analysisWindow = new AnalysisComponent();
                        analysisWindow.SetProject (project, projectType, props, filter);
                        SetPanel (analysisWindow as Widget);
                        return analysisWindow;
@@ -147,7 +145,8 @@ namespace LongoMatch.Gui
                public void CloseProject () {
                        openedProject = null;
                        projectType = ProjectType.None;
-                       centralbox.Remove (analysisWindow as Gtk.Widget);
+                       (analysisWindow as Gtk.Widget).Destroy();
+                       analysisWindow = null;
                        ResetGUI ();
                }
                
@@ -209,14 +208,22 @@ namespace LongoMatch.Gui
                        };
                }
                
+               void RemovePanel () {
+                       if (currentPanel != null) {
+                               if (currentPanel is IPanel) {
+                                       (currentPanel as IPanel).BackEvent -= ResetGUI;
+                               }
+                               currentPanel.Destroy ();
+                               currentPanel.Dispose();
+                               System.GC.Collect();
+                       }
+                       currentPanel = null;
+               }
+               
                private void ResetGUI() {
                        Title = Constants.SOFTWARE_NAME;
                        MakeActionsSensitive(false, projectType);
-                       foreach (Widget widget in centralbox.AllChildren) {
-                               if (widget != welcomepanel1) {
-                                       centralbox.Remove (widget);
-                               }
-                       }
+                       RemovePanel ();
                        welcomepanel1.Show ();
                }