[qt] Fixed bug with not updated progress in Downloader

qt/mainwindow.cpp

@@ -277,8 +277,6 @@ void MainWindow::ShowUpdateDialog()
   if (!m_updateDialog)
     m_updateDialog = new UpdateDialog(this, m_storage);
   m_updateDialog->ShowDialog();
-  // tell download manager that we're gone...
-  m_storage.Unsubscribe();
 }
 
 void MainWindow::ShowClassifPanel()

qt/update_dialog.cpp

@@ -85,6 +85,17 @@ namespace qt
 
     setWindowTitle(tr("Geographical Regions"));
     resize(600, 500);
+
+    // we want to receive all download progress and result events
+    m_storage.Subscribe(bind(&UpdateDialog::OnCountryChanged, this, _1),
+                        bind(&UpdateDialog::OnCountryDownloadProgress, this, _1, _2),
+                        bind(&UpdateDialog::OnUpdateRequest, this, _1, _2));
+  }
+
+  UpdateDialog::~UpdateDialog()
+  {
+    // tell download manager that we're gone...
+    m_storage.Unsubscribe();
   }
 
   /// when user clicks on any map row in the table
@@ -361,10 +372,6 @@ namespace qt
 
   void UpdateDialog::ShowDialog()
   {
-    // we want to receive all download progress and result events
-    m_storage.Subscribe(bind(&UpdateDialog::OnCountryChanged, this, _1),
-                        bind(&UpdateDialog::OnCountryDownloadProgress, this, _1, _2),
-                        bind(&UpdateDialog::OnUpdateRequest, this, _1, _2));
     // if called for first time
     if (!m_tree->topLevelItemCount())
       FillTree();

qt/update_dialog.hpp

@@ -17,6 +17,7 @@ namespace qt
 
   public:
     explicit UpdateDialog(QWidget * parent, storage::Storage & storage);
+    ~UpdateDialog();
 
     /// @name Called from downloader to notify GUI
     //@{