Populate text-edit with run-time info from update-process.

mainwindow.h

@@ -2,12 +2,14 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
+#include <QTimer>
 
 QT_BEGIN_NAMESPACE
 namespace Ui { class MainWindow; }
 QT_END_NAMESPACE
 
-class Worker;
+#include "worker.h"
+
 class MainWindow : public QMainWindow {
     Q_OBJECT
 
@@ -15,12 +17,21 @@ public:
     MainWindow(Worker *worker, QWidget *parent = nullptr);
     ~MainWindow();
 
+public slots:
+    void onAppendText(QString, QString);
+    void onShowErrorMessage(QString, QString);
+    void onSetProgress(quint8);
+    void onStopStartTimer();
+    void onRestartExitTimer();
+
 private slots:
-    void onStartClicked();
-    void onExitClicked();
+    void onQuit();
 
 private:
     Ui::MainWindow *ui;
     Worker *m_worker;
+    int m_width;
+    QTimer *m_startTimer;
+    QTimer *m_exitTimer;
 };
 #endif // MAINWINDOW_H