[packagechooser] Add selection modes

- Introduce different selection modes (most don't work yet)
 - Use model data in the main widget

src/modules/packagechooser/PackageChooserPage.cpp

@@ -36,7 +36,7 @@ PackageChooserPage::PackageChooserPage( PackageChooserMode mode, QWidget* parent
     ui->setupUi( this );
     CALAMARES_RETRANSLATE( updateLabels(); )
 
-    switch( mode )
+    switch ( mode )
     {
     case PackageChooserMode::Optional:
     case PackageChooserMode::Exclusive:
@@ -58,9 +58,11 @@ PackageChooserPage::currentChanged( const QModelIndex& index )
     }
     else
     {
-        ui->productName->setText( QString::number( index.row() ) );
+        const auto* model = ui->products->model();
-        ui->productScreenshot->hide();
+
-        ui->productDescription->setText( "derp" );
+        ui->productName->setText( model->data( index, PackageListModel::NameRole ).toString() );
+        ui->productScreenshot->setPixmap( model->data( index, PackageListModel::ScreenshotRole ).value< QPixmap >() );
+        ui->productDescription->setText( model->data( index, PackageListModel::DescriptionRole ).toString() );
     }
 }
 

src/modules/packagechooser/PackageChooserViewStep.cpp

@@ -93,7 +93,7 @@ PackageChooserViewStep::isNextEnabled() const
         return true;
     }
 
-    switch( m_mode )
+    switch ( m_mode )
     {
     case PackageChooserMode::Optional:
         // zero or one

src/modules/packagechooser/PackageModel.cpp

@@ -83,10 +83,18 @@ PackageListModel::data( const QModelIndex& index, int role ) const
         return QVariant();
     }
 
-    if ( role == Qt::DisplayRole )
+    if ( role == Qt::DisplayRole /* Also PackageNameRole */ )
     {
         return m_packages[ row ].name;
     }
+    else if ( role == DescriptionRole )
+    {
+        return m_packages[ row ].description;
+    }
+    else if ( role == ScreenshotRole )
+    {
+        return m_packages[ row ].screenshot;
+    }
 
     return QVariant();
 }

src/modules/packagechooser/PackageModel.h

@@ -70,6 +70,13 @@ public:
     int rowCount( const QModelIndex& index ) const override;
     QVariant data( const QModelIndex& index, int role ) const override;
 
+    enum Roles : int
+    {
+        NameRole = Qt::DisplayRole,
+        DescriptionRole = Qt::UserRole,
+        ScreenshotRole
+    };
+
 private:
     PackageList m_packages;
 };