gui: add basic gui code.

Gui/frelayGUI.h

@@ -0,0 +1,45 @@
+#ifndef FRELAYGUI_H
+#define FRELAYGUI_H
+
+#include <ClientCore.h>
+#include <QFile>
+#include <QMainWindow>
+#include <QTabWidget>
+#include <thread>
+
+#include "Control/ConnectControl.h"
+#include "Control/FileControl.h"
+#include "Control/LogControl.h"
+
+QT_BEGIN_NAMESPACE
+namespace Ui {
+class frelayGUI;
+}
+QT_END_NAMESPACE
+
+class frelayGUI : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    frelayGUI(QWidget* parent = nullptr);
+    ~frelayGUI();
+
+private:
+    void InitControl();
+    void ControlSignal();
+    void ControlLayout();
+
+protected:
+    void closeEvent(QCloseEvent* event) override;
+
+private:
+    Ui::frelayGUI* ui;
+    LogPrint* log_;
+    QTabWidget* tabWidget_;
+    Connecter* connecter_;
+    FileManager* localFile_;
+    FileManager* remoteFile_;
+    ClientCore* clientCore_;
+};
+#endif   // FRELAYGUI_H