diff --git a/Gtkmm3/gtk119_imageviewer2/src/MyImage.cc b/Gtkmm3/gtk119_imageviewer2/src/MyImage.cc
index 2cc2c86..da7c58a 100644
--- a/Gtkmm3/gtk119_imageviewer2/src/MyImage.cc
+++ b/Gtkmm3/gtk119_imageviewer2/src/MyImage.cc
@@ -1,7 +1,7 @@
 #include "MyImage.hh"
 
 MyImage::MyImage()
-:scale_radio(1.0)
+    : scale_radio(1.0)
 {
 }
 
@@ -17,8 +17,8 @@ bool MyImage::on_draw(const Cairo::RefPtr<Cairo::Context> &cr)
     }
 
     // Set the default size for drawing area
-    set_size_request(surface->get_width()*scale_radio, 
-                     surface->get_height()*scale_radio);
+    set_size_request(surface->get_width() * scale_radio,
+                     surface->get_height() * scale_radio);
 
     cr->scale(scale_radio, scale_radio);
     cr->set_source(surface, 0, 0);
@@ -31,11 +31,13 @@ bool MyImage::on_draw(const Cairo::RefPtr<Cairo::Context> &cr)
 void MyImage::scale_draw(double scale)
 {
     // Set the scale radio and scale
-    if(scale <= 0){
+    if (scale <= 0)
+    {
         scale_radio = 0.1;
         return;
     }
-    if(scale > 10.0){
+    if (scale > 10.0)
+    {
         scale_radio = 10.0;
         return;
     }
@@ -62,7 +64,7 @@ void MyImage::set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf)
     {
     }
 
-    //Get Image Size
+    // Get Image Size
     int width = image->get_width();
     int height = image->get_height();
     // Draw the image in the middle of the surface, or (if the image is
diff --git a/Gtkmm3/gtk119_imageviewer2/src/MyImage.hh b/Gtkmm3/gtk119_imageviewer2/src/MyImage.hh
index 3c5bec9..e44ccca 100644
--- a/Gtkmm3/gtk119_imageviewer2/src/MyImage.hh
+++ b/Gtkmm3/gtk119_imageviewer2/src/MyImage.hh
@@ -2,18 +2,21 @@
 
 #include <gtkmm.h>
 
-class MyImage : public Gtk::DrawingArea{
-    public:
-        MyImage();
-        virtual ~MyImage();
-        //Set a Pixbuf to draw
-        void set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf);
-        //Scale the image
-        void scale_draw(double scale);
-    protected:
-        bool on_draw(const Cairo::RefPtr<Cairo::Context> &cr) override;
-    private:
-        double scale_radio;
-        Cairo::RefPtr<Cairo::ImageSurface> surface;
-        Glib::RefPtr<Gdk::Pixbuf> image;
+class MyImage : public Gtk::DrawingArea
+{
+public:
+    MyImage();
+    virtual ~MyImage();
+    // Set a Pixbuf to draw
+    void set_pixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pixbuf);
+    // Scale the image
+    void scale_draw(double scale);
+
+protected:
+    bool on_draw(const Cairo::RefPtr<Cairo::Context> &cr) override;
+
+private:
+    double scale_radio;
+    Cairo::RefPtr<Cairo::ImageSurface> surface;
+    Glib::RefPtr<Gdk::Pixbuf> image;
 };
diff --git a/Gtkmm3/gtk119_imageviewer2/src/MyWin.hh b/Gtkmm3/gtk119_imageviewer2/src/MyWin.hh
index 05a611a..60715c2 100644
--- a/Gtkmm3/gtk119_imageviewer2/src/MyWin.hh
+++ b/Gtkmm3/gtk119_imageviewer2/src/MyWin.hh
@@ -3,37 +3,39 @@
 #include <gtkmm.h>
 #include "MyImage.hh"
 
-class MyWin : public Gtk::ApplicationWindow{
-    public:
-        MyWin();
-    private:
-        //Child widgets
-        Gtk::ScrolledWindow sw;
-        MyImage image_area;
-        Gtk::Box main_box,btnbox;
-        Gtk::Button btnopen;
-        Gtk::Scale scale;
-        Gtk::Overlay overlay;
-        Glib::RefPtr<Gtk::Adjustment> m_adjustment,hadjustment,vadjustment;
-        Glib::RefPtr<Gtk::FileChooserNative> dialog;
+class MyWin : public Gtk::ApplicationWindow
+{
+public:
+    MyWin();
 
-        //Gesture control
-        Glib::RefPtr<Gtk::GestureDrag> gesture_drag;
-        Glib::RefPtr<Gtk::GestureMultiPress> gesture_click;
-        void drag_begin(double x,double y);
-        void drag_update(double x,double y);
-        void drag_end(double x,double y);
-        void move_to(double x,double y);
+private:
+    // Child widgets
+    Gtk::ScrolledWindow sw;
+    MyImage image_area;
+    Gtk::Box main_box, btnbox;
+    Gtk::Button btnopen;
+    Gtk::Scale scale;
+    Gtk::Overlay overlay;
+    Glib::RefPtr<Gtk::Adjustment> m_adjustment, hadjustment, vadjustment;
+    Glib::RefPtr<Gtk::FileChooserNative> dialog;
 
-        //Menu for image control
-        Gtk::PopoverMenu popover;
-        void press(int n_press,double x,double y);
-        
-        //Signal Handlers
-        void btnopen_clicked();
-        void dialog_response(int response_id);
-        void scale_changed();
-        void image_zoom_in();
-        void image_zoom_out();
-        void image_zoom_reset();
+    // Gesture control
+    Glib::RefPtr<Gtk::GestureDrag> gesture_drag;
+    Glib::RefPtr<Gtk::GestureMultiPress> gesture_click;
+    void drag_begin(double x, double y);
+    void drag_update(double x, double y);
+    void drag_end(double x, double y);
+    void move_to(double x, double y);
+
+    // Menu for image control
+    Gtk::PopoverMenu popover;
+    void press(int n_press, double x, double y);
+
+    // Signal Handlers
+    void btnopen_clicked();
+    void dialog_response(int response_id);
+    void scale_changed();
+    void image_zoom_in();
+    void image_zoom_out();
+    void image_zoom_reset();
 };