Basic JobQueue implementation

src/calamares/CalamaresApplication.cpp

@@ -26,6 +26,7 @@
 #include "modulesystem/ModuleManager.h"
 #include "utils/CalamaresUtilsGui.h"
 #include "utils/Logger.h"
+#include "JobQueue.h"
 #include "Settings.h"
 #include "ViewManager.h"
 
@@ -165,5 +166,5 @@ CalamaresApplication::onPluginsReady()
 void
 CalamaresApplication::initJobQueue()
 {
-
+    new Calamares::JobQueue( this );
 }

src/libcalamares/JobQueue.cpp

@@ -17,9 +17,55 @@
  */
 
 #include "JobQueue.h"
+
+#include "Job.h"
+
+#include <QThread>
+
 namespace Calamares
 {
 
+class JobThread : public QThread
+{
+public:
+    JobThread( JobQueue* queue )
+    : QThread( queue )
+    , m_queue( queue )
+    {
+    }
+
+    void setJobs( const QList< Calamares::job_ptr >& jobs )
+    {
+        m_jobs = jobs;
+    }
+
+    void run() override
+    {
+        int total = m_jobs.size();
+        int current = 0;
+        for( auto job : m_jobs )
+        {
+            emitProgress( current, total, job->prettyName() );
+            job->exec();
+            ++current;
+        }
+        emitProgress( total, total, QString() );
+    }
+
+private:
+    QList< Calamares::job_ptr > m_jobs;
+    JobQueue* m_queue;
+
+    void emitProgress( int current, int total, const QString& prettyName )
+    {
+        QMetaObject::invokeMethod( m_queue, "progress", Qt::QueuedConnection,
+            Q_ARG( int, current ),
+            Q_ARG( int, total ),
+            Q_ARG( QString, prettyName )
+        );
+    }
+};
+
 
 JobQueue* JobQueue::s_instance = nullptr;
 
@@ -33,20 +79,35 @@ JobQueue::instance()
 
 JobQueue::JobQueue( QObject* parent )
     : QObject( parent )
+    , m_thread( new JobThread( this ) )
 {
+    Q_ASSERT( !s_instance );
+    s_instance = this;
+}
+
+
+void
+JobQueue::start()
+{
+    Q_ASSERT( !m_thread->isRunning() );
+    m_thread->setJobs( m_jobs );
+    m_thread->start();
 }
 
 
 void
 JobQueue::enqueue( const Calamares::job_ptr& job )
 {
+    Q_ASSERT( !m_thread->isRunning() );
+    m_jobs.append( job );
 }
 
 
 void
 JobQueue::enqueue( const QList< job_ptr >& jobs )
 {
-
+    Q_ASSERT( !m_thread->isRunning() );
+    m_jobs.append( jobs );
 }
 
 } // namespace Calamares

src/libcalamares/JobQueue.h

@@ -27,6 +27,8 @@
 namespace Calamares
 {
 
+class JobThread;
+
 class DLLEXPORT JobQueue : public QObject
 {
     Q_OBJECT
@@ -37,13 +39,16 @@ public:
 
     void enqueue( const Calamares::job_ptr& job );
     void enqueue( const QList< Calamares::job_ptr >& jobs );
+    void start();
 
 signals:
-    void jobRunning( const Calamares::job_ptr& );
+    void progress( int current, int total, const QString& prettyName );
-    void jobFinished( const Calamares::job_ptr& );
 
 private:
     static JobQueue* s_instance;
+
+    QList< Calamares::job_ptr > m_jobs;
+    JobThread* m_thread;
 };
 
 }

src/libcalamaresui/InstallationViewStep.cpp

@@ -18,15 +18,26 @@
 
 #include <InstallationViewStep.h>
 
+#include <JobQueue.h>
+
 #include <QLabel>
+#include <QProgressBar>
+#include <QVBoxLayout>
 
 namespace Calamares
 {
 
 InstallationViewStep::InstallationViewStep( QObject* parent )
     : ViewStep( parent )
-    , m_widget( new QLabel( "[Installation Progress]" ) )
+    , m_widget( new QWidget )
 {
+    m_progressBar = new QProgressBar;
+    m_label = new QLabel;
+    QVBoxLayout* layout = new QVBoxLayout( m_widget );
+    layout->addWidget(m_progressBar);
+    layout->addWidget(m_label);
+
+    connect( JobQueue::instance(), &JobQueue::progress, this, &InstallationViewStep::updateFromJobQueue );
 }
 
 QString
@@ -76,4 +87,12 @@ InstallationViewStep::jobs() const
     return QList< Calamares::job_ptr >();
 }
 
+void
+InstallationViewStep::updateFromJobQueue( int current, int total, const QString& message )
+{
+    m_progressBar->setMaximum( total );
+    m_progressBar->setValue( current );
+    m_label->setText( message );
+}
+
 } // namespace

src/libcalamaresui/InstallationViewStep.h

@@ -21,6 +21,9 @@
 
 #include <viewpages/ViewStep.h>
 
+class QLabel;
+class QProgressBar;
+
 namespace Calamares
 {
 
@@ -45,6 +48,10 @@ public:
 
 private:
     QWidget* m_widget;
+    QProgressBar* m_progressBar;
+    QLabel* m_label;
+
+    void updateFromJobQueue( int current, int total, const QString& message );
 };
 
 }

src/libcalamaresui/ViewManager.cpp

@@ -20,6 +20,7 @@
 
 #include "viewpages/ViewStep.h"
 #include "InstallationViewStep.h"
+#include "JobQueue.h"
 
 #include <QApplication>
 #include <QLabel>
@@ -152,6 +153,10 @@ ViewManager::next()
         m_steps.at( m_currentStep )->onActivate();
         installing = m_steps.at( m_currentStep ) == m_installationViewStep;
         emit currentStepChanged();
+        if ( installing )
+        {
+            startInstallation();
+        }
     }
     else
     {
@@ -186,4 +191,14 @@ ViewManager::back()
         m_back->setEnabled( false );
 }
 
+void
+ViewManager::startInstallation()
+{
+    for( ViewStep* step : m_prepareSteps )
+    {
+        JobQueue::instance()->enqueue( step->jobs() );
+    }
+    JobQueue::instance()->start();
+}
+
 }

src/libcalamaresui/ViewManager.h

@@ -72,6 +72,7 @@ private:
     QPushButton* m_quit;
 
     void insertViewStep( int before, ViewStep* step );
+    void startInstallation();
 };
 
 }