Browser: removed redundant refresh signals

python/core/qgsbrowsermodel.sip

@@ -183,9 +183,9 @@ Returns true if the model has been initialized
  :rtype: bool
 %End
 
-    void init();
+    void initialize();
 %Docstring
-Delayied initialization
+Delayied initialization, needed because the provider registry must be already populated
 %End
 
   protected:

python/gui/qgsbrowserdockwidget.sip

@@ -21,10 +21,11 @@ class QgsBrowserDockWidget : QgsDockWidget
 %End
   public:
 
-    explicit QgsBrowserDockWidget( const QString &name, QgsBrowserModel *model, QWidget *parent /TransferThis/ = 0 );
+    explicit QgsBrowserDockWidget( const QString &name, QgsBrowserModel *browserModel, QWidget *parent /TransferThis/ = 0 );
 %Docstring
  Constructor for QgsBrowserDockWidget
  \param name name of the widget
+ \param browserModel instance of the (shared) browser model
  \param parent parent widget
 %End
     ~QgsBrowserDockWidget();

src/app/qgisapp.cpp

@@ -873,6 +873,7 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, bool skipVersionCh
   addDockWidget( Qt::LeftDockWidgetArea, mBrowserWidget );
   mBrowserWidget->hide();
   connect( this, &QgisApp::newProject, mBrowserWidget, &QgsBrowserDockWidget::updateProjectHome );
+  // Only connect the first widget: the model is shared, there is no need to refresh multiple times.
   connect( this, &QgisApp::connectionsChanged, mBrowserWidget, &QgsBrowserDockWidget::refresh );
   connect( mBrowserWidget, &QgsBrowserDockWidget::connectionsChanged, this, &QgisApp::connectionsChanged );
   connect( mBrowserWidget, &QgsBrowserDockWidget::openFile, this, &QgisApp::openFile );
@@ -884,7 +885,6 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, bool skipVersionCh
   mBrowserWidget2->hide();
   connect( this, &QgisApp::newProject, mBrowserWidget2, &QgsBrowserDockWidget::updateProjectHome );
   connect( mBrowserWidget2, &QgsBrowserDockWidget::connectionsChanged, this, &QgisApp::connectionsChanged );
-  connect( this, &QgisApp::connectionsChanged, mBrowserWidget2, &QgsBrowserDockWidget::refresh );
   connect( mBrowserWidget2, &QgsBrowserDockWidget::openFile, this, &QgisApp::openFile );
   connect( mBrowserWidget2, &QgsBrowserDockWidget::handleDropUriList, this, &QgisApp::handleDropUriList );
 
@@ -1512,8 +1512,7 @@ void QgisApp::dataSourceManager( const QString &pageName )
   if ( ! mDataSourceManagerDialog )
   {
     mDataSourceManagerDialog = new QgsDataSourceManagerDialog( mBrowserModel, this, mapCanvas() );
-    // Forward signals to this
-    connect( this, &QgisApp::connectionsChanged, mDataSourceManagerDialog, &QgsDataSourceManagerDialog::refresh );
+    // Forward signals to this. No need to connect refresh: the browser model is shared
     connect( mDataSourceManagerDialog, &QgsDataSourceManagerDialog::connectionsChanged, this, &QgisApp::connectionsChanged );
     connect( mDataSourceManagerDialog, SIGNAL( addRasterLayer( QString const &, QString const &, QString const & ) ),
              this, SLOT( addRasterLayer( QString const &, QString const &, QString const & ) ) );

src/core/qgsbrowsermodel.cpp

@@ -169,7 +169,7 @@ void QgsBrowserModel::removeRootItems()
   mRootItems.clear();
 }
 
-void QgsBrowserModel::init()
+void QgsBrowserModel::initialize()
 {
   if ( ! mInitialized )
   {

src/core/qgsbrowsermodel.h

@@ -170,8 +170,8 @@ class CORE_EXPORT QgsBrowserModel : public QAbstractItemModel
     //! Returns true if the model has been initialized
     bool initialized( ) { return mInitialized;  }
 
-    //! Delayied initialization
-    void init();
+    //! Delayied initialization, needed because the provider registry must be already populated
+    void initialize();
 
   protected:
     //! Populates the model

src/gui/qgsbrowserdockwidget.cpp

@@ -38,9 +38,9 @@
 
 #include <QDragEnterEvent>
 
-QgsBrowserDockWidget::QgsBrowserDockWidget( const QString &name, QgsBrowserModel *model, QWidget *parent )
+QgsBrowserDockWidget::QgsBrowserDockWidget( const QString &name, QgsBrowserModel *browserModel, QWidget *parent )
   : QgsDockWidget( parent )
-  , mModel( model )
+  , mModel( browserModel )
   , mProxyModel( nullptr )
   , mPropertiesWidgetEnabled( false )
   , mPropertiesWidgetHeight( 0 )
@@ -114,7 +114,7 @@ void QgsBrowserDockWidget::showEvent( QShowEvent *e )
   // delayed initialization of the model
   if ( !mModel->initialized( ) )
   {
-    mModel->init();
+    mModel->initialize();
   }
   if ( ! mProxyModel )
   {

src/gui/qgsbrowserdockwidget.h

@@ -47,9 +47,10 @@ class GUI_EXPORT QgsBrowserDockWidget : public QgsDockWidget, private Ui::QgsBro
     /**
       * Constructor for QgsBrowserDockWidget
       * \param name name of the widget
+      * \param browserModel instance of the (shared) browser model
       * \param parent parent widget
       */
-    explicit QgsBrowserDockWidget( const QString &name, QgsBrowserModel *model, QWidget *parent SIP_TRANSFERTHIS = nullptr );
+    explicit QgsBrowserDockWidget( const QString &name, QgsBrowserModel *browserModel, QWidget *parent SIP_TRANSFERTHIS = nullptr );
     ~QgsBrowserDockWidget();
     //! Add directory to favorites
     void addFavoriteDirectory( const QString &favDir );

src/gui/qgsdatasourcemanagerdialog.h

@@ -49,6 +49,7 @@ class GUI_EXPORT QgsDataSourceManagerDialog : public QgsOptionsDialogBase, priva
   public:
 
     /** QgsDataSourceManagerDialog constructor
+      * \param browserModel instance of the (shared) browser model
       * \param parent the object
       * \param canvas a pointer to the map canvas
       * \param fl window flags