Start doing some initialisation.

src/gui2/build.py

@@ -4,6 +4,7 @@ from build.pkg import package
 import config
 
 package(name="Qt5Widgets", package="Qt5Widgets")
+package(name="Qt5Concurrent", package="Qt5Concurrent")
 
 normalrule(
     name="userinterface_h",
@@ -57,6 +58,7 @@ cxxprogram(
         "+fmt_lib",
         "+protobuf_lib",
         ".+Qt5Widgets",
+        ".+Qt5Concurrent",
         ".+userinterface",
     ],
 )

src/gui2/globals.h

@@ -1,6 +1,11 @@
 #pragma once
 
+#include "lib/globals.h"
 #include "userinterface.h"
+#include <QThreadPool>
+#include <QtConcurrent>
+
+extern QThreadPool workerThreadPool;
 
 class UserInterface : public Ui_MainWindow
 {
@@ -12,7 +17,19 @@ public:
     Application(int& argc, char** argv): QApplication(argc, argv) {}
     virtual ~Application() {}
 
+    virtual void sendToUiThread(std::function<void()> callback) = 0;
+
 public:
 };
 
-extern std::unique_ptr<Application> app;
+template <typename F>
+auto runOnWorkerThread(F function)
+{
+    return QtConcurrent::run(&workerThreadPool,
+        [=]()
+        {
+            return function();
+        });
+}
+
+extern Application* app;

src/gui2/main.cc

@@ -1,8 +1,12 @@
 #include "globals.h"
 #include "mainwindow.h"
+#include <QtConcurrent>
 
-std::unique_ptr<Application> app;
+Application* app;
+QThreadPool workerThreadPool;
 
+/* This has to go first due to C++ compiler limitations (has to be defined
+ * before use). */
 class ApplicationImpl : public Application
 {
 public:
@@ -13,6 +17,9 @@ public:
         _mainWindow->show();
     }
 
+public:
+    void sendToUiThread(std::function<void()> callback) override {}
+
 private:
     std::unique_ptr<MainWindow> _mainWindow;
 };
@@ -20,6 +27,8 @@ private:
 int main(int argc, char** argv)
 {
     Q_INIT_RESOURCE(resources);
-    app = std::make_unique<ApplicationImpl>(argc, argv);
+    workerThreadPool.setMaxThreadCount(1);
+    ApplicationImpl impl(argc, argv);
+    app = &impl;
     return app->exec();
 }

src/gui2/mainwindow.cc

@@ -1,3 +1,6 @@
+#include "lib/globals.h"
+#include "lib/proto.h"
+#include "lib/usb/usbfinder.h"
 #include "mainwindow.h"
 
 class MainWindowImpl : public MainWindow
@@ -10,6 +13,17 @@ public:
         setCorner(Qt::BottomRightCorner, Qt::RightDockWidgetArea);
 
         setDriveConfigurationPane(noDriveConfigurationWidget);
+        initialiseFormats();
+        initialiseDevices();
+
+        connect(revolutionsSlider,
+            &QSlider::valueChanged,
+            revolutionsSpinBox,
+            &QSpinBox::setValue);
+        connect(revolutionsSpinBox,
+            QOverload<int>::of(&QSpinBox::valueChanged),
+            revolutionsSlider,
+            &QSlider::setValue);
     }
 
 public:
@@ -18,6 +32,26 @@ public:
         for (auto* w : driveConfigurationContainer->findChildren<QWidget*>())
             w->setVisible(w == active);
     }
+
+private:
+    void initialiseFormats()
+    {
+        for (const auto& it : formats)
+        {
+            if (it.second->is_extension())
+                continue;
+
+            formatsList->addItem(QString::fromStdString(it.first));
+        }
+    }
+
+    void initialiseDevices()
+    {
+        auto devices = runOnWorkerThread(findUsbDevices).result();
+
+        for (const auto& it : devices) {}
+        fmt::print("device count = {}\n", devices.size());
+    }
 };
 
 std::unique_ptr<MainWindow> MainWindow::create()

src/gui2/mainwindow.h

@@ -6,4 +6,6 @@ class MainWindow : public QMainWindow, public Ui_MainWindow
 {
 public:
     static std::unique_ptr<MainWindow> create();
+
+public:
 };

src/gui2/userinterface.ui

@@ -350,14 +350,20 @@
              </widget>
             </item>
             <item row="2" column="1" colspan="2">
-             <widget class="QSlider" name="horizontalSlider">
+             <widget class="QSlider" name="revolutionsSlider">
               <property name="orientation">
                <enum>Qt::Horizontal</enum>
               </property>
+              <property name="tickPosition">
+               <enum>QSlider::TicksAbove</enum>
+              </property>
+              <property name="tickInterval">
+               <number>1</number>
+              </property>
              </widget>
             </item>
             <item row="2" column="3">
-             <widget class="QSpinBox" name="spinBox_2"/>
+             <widget class="QSpinBox" name="revolutionsSpinBox"/>
             </item>
             <item row="0" column="0" colspan="4">
              <widget class="QFrame" name="frame">
@@ -771,7 +777,7 @@ background: white;
          <item>
           <layout class="QGridLayout" name="gridLayout_2" columnstretch="0,0,100,0">
            <item row="0" column="2" colspan="2">
-            <widget class="QComboBox" name="comboBox">
+            <widget class="QComboBox" name="formatsList">
              <property name="sizePolicy">
               <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
                <horstretch>0</horstretch>