[libcalamares] Move progress signal to RequirementsModel

- It is the requirements model (checking) that reports progress, and now
  the model is accessible (ask for it with requirementsModel(), make the
  messages come from there.

src/libcalamares/modulesystem/RequirementsChecker.cpp

@@ -41,6 +41,7 @@ RequirementsChecker::RequirementsChecker( QVector< Module* > modules, Requiremen
     , m_progressTimeouts( 0 )
 {
     m_watchers.reserve( m_modules.count() );
+    connect( this, &RequirementsChecker::requirementsProgress, model, &RequirementsModel::setProgressMessage );
 }
 
 RequirementsChecker::~RequirementsChecker() {}
@@ -97,8 +98,7 @@ RequirementsChecker::addCheckedRequirements( Module* m )
         m_model->addRequirementsList( l );
     }
 
-    requirementsProgress(
-        tr( "Requirements checking for module <i>%1</i> is complete." ).arg( m->name() ) );
+    requirementsProgress( tr( "Requirements checking for module <i>%1</i> is complete." ).arg( m->name() ) );
 }
 
 void

src/libcalamares/modulesystem/RequirementsModel.cpp

@@ -105,4 +105,11 @@ RequirementsModel::describe() const
     }
 }
 
+void
+RequirementsModel::setProgressMessage( const QString& m )
+{
+    m_progressMessage = m;
+    emit progressMessageChanged( m_progressMessage );
+}
+
 }  // namespace Calamares

src/libcalamares/modulesystem/RequirementsModel.h

@@ -46,6 +46,7 @@ class DLLEXPORT RequirementsModel : public QAbstractListModel
     Q_OBJECT
     Q_PROPERTY( bool satisfiedRequirements READ satisfiedRequirements NOTIFY satisfiedRequirementsChanged FINAL )
     Q_PROPERTY( bool satisfiedMandatory READ satisfiedMandatory NOTIFY satisfiedMandatoryChanged FINAL )
+    Q_PROPERTY( QString progressMessage READ progressMessage NOTIFY progressMessageChanged FINAL )
 
 public:
     using QAbstractListModel::QAbstractListModel;
@@ -65,6 +66,9 @@ public:
     bool satisfiedRequirements() const { return m_satisfiedRequirements; }
     ///@brief Are all the **mandatory** requirements satisfied?
     bool satisfiedMandatory() const { return m_satisfiedMandatory; }
+    ///@brief Message (from an ongoing check) about progress
+    QString progressMessage() const { return m_progressMessage; }
+
 
     QVariant data( const QModelIndex& index, int role ) const override;
     int rowCount( const QModelIndex& ) const override;
@@ -76,6 +80,7 @@ public:
 signals:
     void satisfiedRequirementsChanged( bool value );
     void satisfiedMandatoryChanged( bool value );
+    void progressMessageChanged( QString message );
 
 protected:
     QHash< int, QByteArray > roleNames() const override;
@@ -83,10 +88,14 @@ protected:
     ///@brief Append some requirements; resets the model
     void addRequirementsList( const Calamares::RequirementsList& requirements );
 
+    ///@brief Update progress message (called by the checker)
+    void setProgressMessage( const QString& m );
+
 private:
     ///@brief Implementation for {set,add}RequirementsList
     void changeRequirementsList();
 
+    QString m_progressMessage;
     QMutex m_addLock;
     RequirementsList m_requirements;
     bool m_satisfiedRequirements = false;

src/libcalamaresui/modulesystem/ModuleManager.cpp

@@ -358,7 +358,6 @@ ModuleManager::checkRequirements()
     }
 
     RequirementsChecker* rq = new RequirementsChecker( modules, m_requirementsModel, this );
-    connect( rq, &RequirementsChecker::requirementsProgress, this, &ModuleManager::requirementsProgress );
     connect( rq, &RequirementsChecker::done, rq, &RequirementsChecker::deleteLater );
     connect( rq, &RequirementsChecker::done, this, [=](){ this->requirementsComplete( m_requirementsModel->satisfiedMandatory() ); } );
 

src/libcalamaresui/modulesystem/ModuleManager.h

@@ -100,7 +100,6 @@ signals:
     void modulesFailed( QStringList );  /// .. or not
     // Below, see RequirementsChecker documentation
     void requirementsComplete( bool );
-    void requirementsProgress( const QString& );
 
 private slots:
     void doInit();