[bugfix] Sync the dialogs connections when changed from the browser

For now it's only for WMS but you get the idea.

There is a new abstract base class for the source select
dialogs, that will grow with common behavior for all
the select dialogs.

Signals are forwarded from the (root) data items to the
app and then delivered to the various browser instances
and to the unified layer dialog.

A change in one of the browser items should trigger a
refresh in all the other browsers and dialogs.

python/core/qgsbrowsermodel.sip

@@ -138,6 +138,10 @@ Refresh item children
     void stateChanged( const QModelIndex &index, QgsDataItem::State oldState );
 %Docstring
 Emitted when item children fetch was finished
+%End
+    void connectionsChanged( );
+%Docstring
+notify the provider dialogs of a changed connection
 %End
 
   public slots:

python/core/qgsdataitem.sip

@@ -304,6 +304,11 @@ Remove children recursively and set as not populated. This is used when refreshi
 
     virtual void refresh();
 
+    virtual void refreshConnections();
+%Docstring
+Refresh connections: update GUI and emit signal
+%End
+
     virtual void childrenCreated();
 
   signals:
@@ -313,6 +318,10 @@ Remove children recursively and set as not populated. This is used when refreshi
     void endRemoveItems();
     void dataChanged( QgsDataItem *item );
     void stateChanged( QgsDataItem *item, QgsDataItem::State oldState );
+    void connectionsChanged( );
+%Docstring
+Emitted when the provider's connections of the child items have changed
+%End
 
   protected slots:
 

python/gui/qgsbrowserdockwidget.sip

@@ -105,7 +105,7 @@ Toggle fast scan
 
     void selectionChanged( const QItemSelection &selected, const QItemSelection &deselected );
 %Docstring
-Selection hass changed
+Selection has changed
 %End
     void splitterMoved();
 %Docstring

src/core/qgsbrowsermodel.cpp

@@ -139,6 +139,8 @@ void QgsBrowserModel::addRootItems()
     QgsDataItem *item = pr->createDataItem( QLatin1String( "" ), nullptr );  // empty path -> top level
     if ( item )
     {
+      // Forward the signal from the root items to the model (and then to the app)
+      connect( item, &QgsDataItem::connectionsChanged, this, &QgsBrowserModel::connectionsChanged );
       QgsDebugMsgLevel( "Add new top level item : " + item->name(), 4 );
       connectItem( item );
       providerMap.insertMulti( capabilities, item );
@@ -411,6 +413,7 @@ void QgsBrowserModel::itemStateChanged( QgsDataItem *item, QgsDataItem::State ol
   QgsDebugMsgLevel( QString( "item %1 state changed %2 -> %3" ).arg( item->path() ).arg( oldState ).arg( item->state() ), 4 );
   emit stateChanged( idx, oldState );
 }
+
 void QgsBrowserModel::connectItem( QgsDataItem *item )
 {
   connect( item, &QgsDataItem::beginInsertItems,
@@ -425,6 +428,11 @@ void QgsBrowserModel::connectItem( QgsDataItem *item )
            this, &QgsBrowserModel::itemDataChanged );
   connect( item, &QgsDataItem::stateChanged,
            this, &QgsBrowserModel::itemStateChanged );
+
+  // if it's a collection item, also forwards connectionsChanged
+  QgsDataCollectionItem *collectionItem = dynamic_cast<QgsDataCollectionItem *>( item );
+  if ( collectionItem )
+    connect( collectionItem, &QgsDataCollectionItem::connectionsChanged, this, &QgsBrowserModel::connectionsChanged );
 }
 
 QStringList QgsBrowserModel::mimeTypes() const

src/core/qgsbrowsermodel.h

@@ -134,6 +134,9 @@ class CORE_EXPORT QgsBrowserModel : public QAbstractItemModel
   signals:
     //! Emitted when item children fetch was finished
     void stateChanged( const QModelIndex &index, QgsDataItem::State oldState );
+    //! Connections changed in the browser, forwarded to the widget and used to
+    //! notify the provider dialogs of a changed connection
+    void connectionsChanged( );
 
   public slots:
     //! Reload the whole model

src/core/qgsdataitem.cpp

@@ -342,6 +342,12 @@ void QgsDataItem::refresh()
   }
 }
 
+void QgsDataItem::refreshConnections()
+{
+  refresh( );
+  emit connectionsChanged( );
+}
+
 void QgsDataItem::refresh( const QVector<QgsDataItem *> &children )
 {
   QgsDebugMsgLevel( "mPath = " + mPath, 2 );

src/core/qgsdataitem.h

@@ -283,6 +283,9 @@ class CORE_EXPORT QgsDataItem : public QObject
 
     virtual void refresh();
 
+    //! Refresh connections: update GUI and emit signal
+    virtual void refreshConnections();
+
     virtual void childrenCreated();
 
   signals:
@@ -292,6 +295,8 @@ class CORE_EXPORT QgsDataItem : public QObject
     void endRemoveItems();
     void dataChanged( QgsDataItem *item );
     void stateChanged( QgsDataItem *item, QgsDataItem::State oldState );
+    //! Emitted when the provider's connections of the child items have changed
+    void connectionsChanged( );
 
   protected slots:
 

src/gui/CMakeLists.txt

@@ -346,6 +346,7 @@ SET(QGIS_GUI_SRCS
   qgsvertexmarker.cpp
   qgsfiledownloader.cpp
   qgsdatasourcemanagerdialog.cpp
+  qgssourceselect.cpp
 )
 
 SET(QGIS_GUI_MOC_HDRS
@@ -502,6 +503,7 @@ SET(QGIS_GUI_MOC_HDRS
   ogr/qgsopenvectorlayerdialog.h
   ogr/qgsnewogrconnection.h
   ogr/qgsvectorlayersaveasdialog.h
+  qgssourceselect.h
 
   raster/qgsmultibandcolorrendererwidget.h
   raster/qgspalettedrendererwidget.h
@@ -710,6 +712,7 @@ SET(QGIS_GUI_HDRS
   ogr/qgsnewogrconnection.h
   ogr/qgsvectorlayersaveasdialog.h
 
+  qgssourceselect.h
 
   attributetable/qgsfeaturemodel.h
 

src/gui/qgsbrowserdockwidget.cpp

@@ -129,6 +129,11 @@ void QgsBrowserDockWidget::showEvent( QShowEvent *e )
     connect( mBrowserView->selectionModel(), &QItemSelectionModel::selectionChanged,
              this, &QgsBrowserDockWidget::selectionChanged );
 
+    // Forward the model changed signals to the widget
+    connect( mModel, &QgsBrowserModel::connectionsChanged,
+             this, &QgsBrowserDockWidget::connectionsChanged );
+
+
     // objectName used by settingsSection() is not yet set in constructor
     QgsSettings settings;
     mPropertiesWidgetEnabled = settings.value( settingsSection() + "/propertiesWidgetEnabled", false ).toBool();

src/gui/qgsbrowserdockwidget.h

@@ -92,7 +92,7 @@ class GUI_EXPORT QgsBrowserDockWidget : public QgsDockWidget, private Ui::QgsBro
     //! Toggle fast scan
     void toggleFastScan();
 
-    //! Selection hass changed
+    //! Selection has changed
     void selectionChanged( const QItemSelection &selected, const QItemSelection &deselected );
     //! Splitter has been moved
     void splitterMoved();

src/gui/qgsdatasourcemanagerdialog.cpp

@@ -171,7 +171,7 @@ void QgsDataSourceManagerDialog::setPreviousPage()
 void QgsDataSourceManagerDialog::refresh()
 {
   mBrowserWidget->refresh( );
-  emit dlg_refresh();
+  emit providerDialogsRefreshRequested();
 }
 
 void QgsDataSourceManagerDialog::rasterLayerAdded( const QString &uri, const QString &baseName, const QString &providerKey )
@@ -221,7 +221,7 @@ void QgsDataSourceManagerDialog::addDbProviderDialog( const QString providerKey,
     connect( dlg, SIGNAL( progressMessage( QString ) ),
              this, SIGNAL( showStatusMessage( QString ) ) );
     connect( dlg, SIGNAL( connectionsChanged( ) ), this, SIGNAL( connectionsChanged( ) ) );
-    connect( this,  SIGNAL( dlg_refresh( ) ), dlg, SLOT( refresh( ) ) );
+    connect( this,  SIGNAL( providerDialogsRefreshRequested( ) ), dlg, SLOT( refresh( ) ) );
   }
 }
 
@@ -234,6 +234,6 @@ void QgsDataSourceManagerDialog::addRasterProviderDialog( const QString provider
     connect( dlg, SIGNAL( addRasterLayer( QString const &, QString const &, QString const & ) ),
              this, SIGNAL( addRasterLayer( QString const &, QString const &, QString const & ) ) );
     connect( dlg, SIGNAL( connectionsChanged( ) ), this, SIGNAL( connectionsChanged( ) ) );
-    connect( this,  SIGNAL( dlg_refresh( ) ), dlg, SLOT( refresh( ) ) );
+    connect( this,  SIGNAL( providerDialogsRefreshRequested( ) ), dlg, SLOT( refresh( ) ) );
   }
 }

src/gui/qgsdatasourcemanagerdialog.h

@@ -106,8 +106,9 @@ class GUI_EXPORT QgsDataSourceManagerDialog : public QgsOptionsDialogBase, priva
     void updateProjectHome();
     //! Connections changed
     void connectionsChanged( );
-    // internal signal
-    void dlg_refresh( );
+    //! One or more provider connections have changed and the
+    //! dialogs should be refreshed
+    void providerDialogsRefreshRequested( );
 
   private:
     //! Return the dialog from the provider

src/gui/qgssourceselect.cpp

@@ -0,0 +1,30 @@
+/***************************************************************************
+    qgssourceselect.cpp  -  base class for source selector widgets
+                             -------------------
+    begin                : 10 July 2017
+    original             : (C) 2017 by Alessandro Pasotti email  : apasotti at boundlessgeo dot com
+
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "qgssourceselect.h"
+
+QgsSourceSelect::QgsSourceSelect( QWidget *parent, Qt::WindowFlags fl, QgsProviderRegistry::WidgetMode widgetMode ):
+  QDialog( parent, fl ),
+  mWidgetMode( widgetMode )
+{
+
+}
+
+QgsSourceSelect::~QgsSourceSelect()
+{
+
+}

src/gui/qgssourceselect.h

@@ -0,0 +1,65 @@
+/***************************************************************************
+    qgssourceselect.h  -  base class for source selector widgets
+                             -------------------
+    begin                : 10 July 2017
+    original             : (C) 2017 by Alessandro Pasotti email  : apasotti at boundlessgeo dot com
+
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef QGSSOURCESELECT_H
+#define QGSSOURCESELECT_H
+#include "qgis_sip.h"
+#include "qgis.h"
+#include "qgis_gui.h"
+
+#include "qgsproviderregistry.h"
+#include "qgsguiutils.h"
+
+#include <QDialog>
+
+/** \ingroup gui
+ * \brief  Abstract base Dialog to create connections and add layers
+ * This class must provide common functionality and the interface for all
+ * source select dialogs used by data providers to configure data sources
+ * and add layers.
+ */
+class GUI_EXPORT QgsSourceSelect : public QDialog
+{
+    Q_OBJECT
+
+  public:
+
+    //! Constructor
+    QgsSourceSelect( QWidget *parent SIP_TRANSFERTHIS = nullptr, Qt::WindowFlags fl = QgsGuiUtils::ModalDialogFlags, QgsProviderRegistry::WidgetMode widgetMode = QgsProviderRegistry::WidgetMode::None );
+
+    //! Destructor
+    ~QgsSourceSelect( );
+
+    //! Return the widget mode
+    QgsProviderRegistry::WidgetMode widgetMode( ) { return mWidgetMode; }
+
+  public slots:
+
+    //! Triggered when the provider's connections need to be refreshed
+    virtual void refresh( ) = 0;
+
+  signals:
+
+    //! Emitted when the provider's connections have changed
+    void connectionsChanged();
+
+  private:
+
+    QgsProviderRegistry::WidgetMode mWidgetMode;
+};
+
+#endif // QGSSOURCESELECT_H

src/providers/wms/qgswmsdataitems.cpp

@@ -241,15 +241,15 @@ void QgsWMSConnectionItem::editConnection()
   if ( nc.exec() )
   {
     // the parent should be updated
-    mParent->refresh();
+    mParent->refreshConnections();
   }
 }
 
 void QgsWMSConnectionItem::deleteConnection()
 {
   QgsWMSConnection::deleteConnection( mName );
   // the parent should be updated
-  mParent->refresh();
+  mParent->refreshConnections();
 }
 #endif
 
@@ -418,22 +418,16 @@ QList<QAction *> QgsWMSRootItem::actions()
 QWidget *QgsWMSRootItem::paramWidget()
 {
   QgsWMSSourceSelect *select = new QgsWMSSourceSelect( nullptr, 0, QgsProviderRegistry::WidgetMode::Manager );
-  connect( select, &QgsWMSSourceSelect::connectionsChanged, this, &QgsWMSRootItem::connectionsChanged );
   return select;
 }
 
-void QgsWMSRootItem::connectionsChanged()
-{
-  refresh();
-}
-
 void QgsWMSRootItem::newConnection()
 {
   QgsNewHttpConnection nc( nullptr );
 
   if ( nc.exec() )
   {
-    refresh();
+    refreshConnections( );
   }
 }
 #endif

src/providers/wms/qgswmsdataitems.h

@@ -107,9 +107,9 @@ class QgsWMSRootItem : public QgsDataCollectionItem
 
   public slots:
 #ifdef HAVE_GUI
-    void connectionsChanged();
     void newConnection();
 #endif
+
 };
 
 

src/providers/wms/qgswmssourceselect.cpp

@@ -55,14 +55,13 @@
 #include <QNetworkReply>
 
 QgsWMSSourceSelect::QgsWMSSourceSelect( QWidget *parent, Qt::WindowFlags fl, QgsProviderRegistry::WidgetMode widgetMode )
-  : QDialog( parent, fl )
-  , mWidgetMode( widgetMode )
+  : QgsSourceSelect( parent, fl, widgetMode )
   , mDefaultCRS( GEO_EPSG_CRS_AUTHID )
   , mCurrentTileset( nullptr )
 {
   setupUi( this );
 
-  if ( mWidgetMode != QgsProviderRegistry::WidgetMode::None )
+  if ( QgsSourceSelect::widgetMode() != QgsProviderRegistry::WidgetMode::None )
   {
     // For some obscure reason hiding does not work!
     // buttonBox->button( QDialogButtonBox::Close )->hide();
@@ -81,7 +80,7 @@ QgsWMSSourceSelect::QgsWMSSourceSelect( QWidget *parent, Qt::WindowFlags fl, Qgs
 
   mImageFormatGroup = new QButtonGroup;
 
-  if ( mWidgetMode != QgsProviderRegistry::WidgetMode::Manager )
+  if ( QgsSourceSelect::widgetMode( ) != QgsProviderRegistry::WidgetMode::Manager )
   {
     buttonBox->addButton( mAddButton, QDialogButtonBox::ActionRole );
     connect( mAddButton, &QAbstractButton::clicked, this, &QgsWMSSourceSelect::addClicked );
@@ -156,6 +155,13 @@ QgsWMSSourceSelect::~QgsWMSSourceSelect()
   settings.setValue( QStringLiteral( "Windows/WMSSourceSelect/geometry" ), saveGeometry() );
 }
 
+void QgsWMSSourceSelect::refresh( )
+{
+  // Reload WMS connections and update the GUI
+  QgsDebugMsg( "Refreshing WMS connections ..." );
+  populateConnectionList( );
+}
+
 
 void QgsWMSSourceSelect::populateConnectionList()
 {
@@ -164,6 +170,7 @@ void QgsWMSSourceSelect::populateConnectionList()
 
   setConnectionListPosition();
 }
+
 void QgsWMSSourceSelect::on_btnNew_clicked()
 {
   QgsNewHttpConnection *nc = new QgsNewHttpConnection( this );