4 files changed, 40 insertions, 10 deletions
diff --git a/gui/ice40/mainwindow.cc b/gui/ice40/mainwindow.cc
index 61ceb3e6..32074adc 100644
--- a/gui/ice40/mainwindow.cc
+++ b/gui/ice40/mainwindow.cc
@@ -36,14 +36,14 @@ static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }
 
 NEXTPNR_NAMESPACE_BEGIN
 
-MainWindow::MainWindow(Context *_ctx, QWidget *parent) : BaseMainWindow(_ctx, parent), timing_driven(false)
+MainWindow::MainWindow(QWidget *parent) : BaseMainWindow(parent), timing_driven(false)
 {
     initMainResource();
 
-    std::string title = "nextpnr-ice40 - " + ctx->getChipName();
+    std::string title = "nextpnr-ice40 - [EMPTY]";
     setWindowTitle(title.c_str());
 
-    task = new TaskManager(_ctx);
+    task = new TaskManager();
     connect(task, SIGNAL(log(std::string)), this, SLOT(writeInfo(std::string)));
 
     connect(task, SIGNAL(loadfile_finished(bool)), this, SLOT(loadfile_finished(bool)));
@@ -58,6 +58,9 @@ MainWindow::MainWindow(Context *_ctx, QWidget *parent) : BaseMainWindow(_ctx, pa
     connect(task, SIGNAL(taskStarted()), this, SLOT(taskStarted()));
     connect(task, SIGNAL(taskPaused()), this, SLOT(taskPaused()));
 
+    connect(this, SIGNAL(contextChanged(Context*)), this, SLOT(newContext(Context*)));
+    connect(this, SIGNAL(contextChanged(Context*)), task, SIGNAL(contextChanged(Context*)));
+
     createMenu();
 }
 
@@ -178,12 +181,27 @@ void MainWindow::createMenu()
 void MainWindow::new_proj()
 {
     disableActions();
+    ArchArgs chipArgs;
+    chipArgs.type = ArchArgs::HX1K;
+    chipArgs.package = "tq144";
+    if (ctx) 
+        delete ctx;
+    ctx = new Context(chipArgs);
+    
+    Q_EMIT contextChanged(ctx);
+
     actionLoadJSON->setEnabled(true);
 }
 
+void MainWindow::newContext(Context *ctx)
+{
+    std::string title = "nextpnr-ice40 - " + ctx->getChipName();
+    setWindowTitle(title.c_str());
+}
+
 void MainWindow::open_proj()
 {
-    QString fileName = QFileDialog::getOpenFileName(this, QString("Open Project"), QString(), QString("*.npnr"));
+    QString fileName = QFileDialog::getOpenFileName(this, QString("Open Project"), QString(), QString("*.proj"));
     if (!fileName.isEmpty()) {
         tabWidget->setCurrentWidget(info);
 
diff --git a/gui/ice40/mainwindow.h b/gui/ice40/mainwindow.h
index f4037a47..ffeb0473 100644
--- a/gui/ice40/mainwindow.h
+++ b/gui/ice40/mainwindow.h
@@ -30,7 +30,7 @@ class MainWindow : public BaseMainWindow
     Q_OBJECT
 
   public:
-    explicit MainWindow(Context *ctx, QWidget *parent = 0);
+    explicit MainWindow(QWidget *parent = 0);
     virtual ~MainWindow();
 
   public:
@@ -59,6 +59,8 @@ class MainWindow : public BaseMainWindow
     void taskStarted();
     void taskPaused();
 
+    void newContext(Context *ctx);
+
   private:
     void disableActions();
 
diff --git a/gui/ice40/worker.cc b/gui/ice40/worker.cc
index f6d6d261..c49b8769 100644
--- a/gui/ice40/worker.cc
+++ b/gui/ice40/worker.cc
@@ -35,7 +35,7 @@ struct WorkerInterruptionRequested
 {
 };
 
-Worker::Worker(Context *_ctx, TaskManager *parent) : ctx(_ctx)
+Worker::Worker(TaskManager *parent) : ctx(nullptr)
 {
     log_write_function = [this, parent](std::string text) {
         Q_EMIT log(text);
@@ -56,6 +56,11 @@ Worker::Worker(Context *_ctx, TaskManager *parent) : ctx(_ctx)
     };
 }
 
+void Worker::newContext(Context *ctx_)
+{
+    ctx = ctx_;
+}
+
 void Worker::loadfile(const std::string &filename)
 {
     Q_EMIT taskStarted();
@@ -136,9 +141,9 @@ void Worker::route()
     }
 }
 
-TaskManager::TaskManager(Context *ctx) : toTerminate(false), toPause(false)
+TaskManager::TaskManager() : toTerminate(false), toPause(false)
 {
-    Worker *worker = new Worker(ctx, this);
+    Worker *worker = new Worker(this);
     worker->moveToThread(&workerThread);
 
     connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);
@@ -151,6 +156,9 @@ TaskManager::TaskManager(Context *ctx) : toTerminate(false), toPause(false)
     connect(this, &TaskManager::place, worker, &Worker::place);
     connect(this, &TaskManager::route, worker, &Worker::route);
 
+
+    connect(this, &TaskManager::contextChanged, worker, &Worker::newContext);
+
     connect(worker, &Worker::log, this, &TaskManager::info);
     connect(worker, &Worker::loadfile_finished, this, &TaskManager::loadfile_finished);
     connect(worker, &Worker::loadpcf_finished, this, &TaskManager::loadpcf_finished);
diff --git a/gui/ice40/worker.h b/gui/ice40/worker.h
index 18f4b2c2..f4369535 100644
--- a/gui/ice40/worker.h
+++ b/gui/ice40/worker.h
@@ -32,8 +32,9 @@ class Worker : public QObject
 {
     Q_OBJECT
   public:
-    Worker(Context *ctx, TaskManager *parent);
+    explicit Worker(TaskManager *parent);
   public Q_SLOTS:
+    void newContext(Context *);
     void loadfile(const std::string &);
     void loadpcf(const std::string &);
     void saveasc(const std::string &);
@@ -64,7 +65,7 @@ class TaskManager : public QObject
     QThread workerThread;
 
   public:
-    TaskManager(Context *ctx);
+    explicit TaskManager();
     ~TaskManager();
     bool shouldTerminate();
     void clearTerminate();
@@ -75,6 +76,7 @@ class TaskManager : public QObject
     void pause_thread();
     void continue_thread();
   Q_SIGNALS:
+    void contextChanged(Context *ctx);
     void terminate();
     void loadfile(const std::string &);
     void loadpcf(const std::string &);