Persistent partition model

This will make it possible to update the partition list on changes,
regardless of the actual device state

src/modules/partition/DeviceModel.cpp

@@ -16,20 +16,43 @@
  *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
  */
 #include <DeviceModel.h>
+#include <PartitionModel.h>
 
 // CalaPM
 #include <core/device.h>
 
+DeviceModel::DeviceInfo::DeviceInfo( Device* dev )
+    : device( dev )
+    , partitionModel( new PartitionModel )
+{
+    partitionModel->init( dev );
+}
+
+DeviceModel::DeviceInfo::~DeviceInfo()
+{
+    delete device;
+    delete partitionModel;
+}
+
 DeviceModel::DeviceModel( QObject* parent )
     : QAbstractListModel( parent )
 {
 }
 
+DeviceModel::~DeviceModel()
+{
+    qDeleteAll( m_devices );
+}
+
 void
 DeviceModel::init( const QList< Device* >& devices )
 {
     beginResetModel();
-    m_devices = devices;
+    m_devices.clear();
+    for ( auto device : devices )
+    {
+        m_devices << new DeviceInfo( device );
+    }
     endResetModel();
 }
 
@@ -48,7 +71,7 @@ DeviceModel::data( const QModelIndex& index, int role ) const
         return QVariant();
     }
 
-    Device* device = m_devices.at( row );
+    Device* device = m_devices.at( row )->device;
 
     switch ( role )
     {
@@ -66,13 +89,13 @@ DeviceModel::data( const QModelIndex& index, int role ) const
     }
 }
 
-Device*
-DeviceModel::deviceForIndex( const QModelIndex& index ) const
+PartitionModel*
+DeviceModel::partitionModelForIndex( const QModelIndex& index ) const
 {
     int row = index.row();
     if ( row < 0 || row >= m_devices.count() )
     {
         return nullptr;
     }
-    return m_devices.at( row );
+    return m_devices.at( row )->partitionModel;
 }

src/modules/partition/DeviceModel.h

@@ -19,23 +19,38 @@
 #define DEVICEMODEL_H
 
 #include <QAbstractListModel>
+#include <QScopedPointer>
 #include <QList>
 
 class Device;
+class PartitionModel;
 
 class DeviceModel : public QAbstractListModel
 {
 public:
     DeviceModel( QObject* parent = 0 );
+    ~DeviceModel();
+
+    /**
+     * Init the model with the list of devices.
+     * Takes ownership of the devices.
+     */
     void init( const QList< Device* >& devices );
 
     int rowCount( const QModelIndex& parent = QModelIndex() ) const Q_DECL_OVERRIDE;
     QVariant data( const QModelIndex& index, int role = Qt::DisplayRole ) const Q_DECL_OVERRIDE;
 
-    Device* deviceForIndex( const QModelIndex& index ) const;
+    PartitionModel* partitionModelForIndex( const QModelIndex& index ) const;
 
 private:
-    QList< Device* > m_devices;
+    struct DeviceInfo
+    {
+        DeviceInfo( Device* dev );
+        ~DeviceInfo();
+        Device* device;
+        PartitionModel* partitionModel;
+    };
+    QList< DeviceInfo* > m_devices;
 };
 
 #endif /* DEVICEMODEL_H */

src/modules/partition/PartitionPage.cpp

@@ -36,7 +36,6 @@ PartitionPage::PartitionPage( QWidget* parent )
     : Calamares::AbstractPage( parent )
     , m_ui( new Ui_PartitionPage )
     , m_deviceModel( new DeviceModel( this ) )
-    , m_partitionModel( new PartitionModel( this ) )
 {
     // FIXME: Should be done at startup
     if ( !CalaPM::init() )
@@ -46,16 +45,15 @@ PartitionPage::PartitionPage( QWidget* parent )
     m_backend = CoreBackendManager::self()->backend();
     m_ui->setupUi( this );
     m_ui->deviceListView->setModel( m_deviceModel );
-    m_ui->partitionListView->setModel( m_partitionModel );
 
     m_deviceModel->init( m_backend->scanDevices() );
 
     connect( m_ui->deviceListView->selectionModel(), &QItemSelectionModel::currentChanged,
-        [ this ]( const QModelIndex& index, const QModelIndex& oldIndex )
-        {
-            Device* device = m_deviceModel->deviceForIndex( index );
-            m_partitionModel->init( device );
-        } );
+             [ this ]( const QModelIndex& index, const QModelIndex& oldIndex )
+    {
+        PartitionModel* model = m_deviceModel->partitionModelForIndex( index );
+        m_ui->partitionListView->setModel( model );
+    } );
 }
 
 PartitionPage::~PartitionPage()

src/modules/partition/PartitionPage.h

@@ -27,7 +27,6 @@ class CoreBackend;
 class Ui_PartitionPage;
 
 class DeviceModel;
-class PartitionModel;
 
 class PartitionPage : public Calamares::AbstractPage
 {
@@ -43,7 +42,6 @@ public Q_SLOTS:
 private:
     QScopedPointer< Ui_PartitionPage > m_ui;
     DeviceModel* m_deviceModel;
-    PartitionModel* m_partitionModel;
     CoreBackend* m_backend;
 };