diff --git a/mainwindow.h b/mainwindow.h
index 9d4e3cd..37f4e03 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -10,6 +10,10 @@ namespace Ui { class MainWindow; }
 QT_END_NAMESPACE
 
 #include "worker.h"
+#include "update.h"
+#include "update_dc_event.h"
+
+#define EMERGENCY_LEAVE_BL 0
 
 class hwinf;
 class MainWindow : public QMainWindow {
@@ -19,39 +23,60 @@ protected:
     void customEvent(QEvent *event) override;
 
 public:
-    MainWindow(hwinf *hw, Worker *worker, QWidget *parent = nullptr);
+    MainWindow(hwinf *hw, Worker *worker, Update *update, QWidget *parent = nullptr);
     ~MainWindow();
 
     static const int START_PROGRESS_LOOP = -1;
     static const int STOP_PROGRESS_LOOP = -2;
+    static const int BL_START_COUNT = 5;
+    static const int BL_CHECK_COUNT = 5;
+    static const int BL_IS_UP_COUNT = 5;
+    static const int BL_STOP_COUNT = 5;
 
     int progressValue() const { return m_progressValue; }
     hwinf *getPlugin() { return m_hw; }
     hwinf const *getPlugin() const { return m_hw; }
+    Update *getUpdate() { return m_update; }
+    Update const *getUpdate() const { return m_update; }
+    UpdateDcEvent::UpdateStep updateStep() const { return m_updateStep; }
+    void setUpdateStep(UpdateDcEvent::UpdateStep updateStep) { m_updateStep = updateStep; }
 
 public slots:
     void onAppendText(QString, QString suffix = "");
     void onReplaceLast(QStringList, QString suffix = "");
     void onReplaceLast(QString, QString suffix = "");
     void onShowErrorMessage(QString, QString);
+    void onShowStatusMessage(QString, QString);
     void onStopStartTimer();
     void onRestartExitTimer();
     void onEnableExit();
     void onDisableExit();
+#if EMERGENCY_LEAVE_BL==1
+    void emergencyLeaveBL();
+#endif
+
+signals:
+
+#if EMERGENCY_LEAVE_BL==1
+    void leaveBL();
+#endif
 
 private slots:
     void onQuit();
 
 private:
     void scrollDownTextEdit();
+    void onShowMessage(QString, QString);
 
     Ui::MainWindow *ui;
     hwinf *m_hw;
     Worker *m_worker;
-    int m_width;
+    int const m_width;
     QTimer *m_startTimer;
     QTimer *m_exitTimer;
     bool m_progressRunning;
     int m_progressValue;
+    Update *m_update;
+    UpdateDcEvent::UpdateStep m_updateStep;
 };
 #endif // MAINWINDOW_H