Can show an alert popup

ui_utils.cpp

@@ -15,9 +15,32 @@ void ui_utils::print_base_screen(WINDOW *w)
 
     const string msg = "Light client";
     mvprintw(0, (col-static_cast<int>(msg.length())), msg.c_str());
+}
+
+void ui_utils::alert(WINDOW *win, const string &msg)
+{
+    erase();
+    print_base_screen(win);
+
+    int rows, cols;
+    getmaxyx(win, rows, cols);
+
+    int start = (rows/2) - 3;
+
+    mvwprintw(win, start, (cols-static_cast<int>(msg.length()))/2, msg.c_str());
+
+    wattron(stdscr, A_REVERSE);
+    mvwprintw(win, start+3, (cols-4)/2, " OK ");
+    wattroff(stdscr, A_REVERSE);
+
+
+
+    curs_set(0);
     refresh();
 
+    while(getch() != 10);
 
-
+    curs_set(1);
-
+    erase();
+    refresh();
 }

ui_utils.h

@@ -0,0 +1,16 @@
+/**
+ * UI utilities
+ *
+ * @author Pierre HUBERT
+ */
+
+#include <ncurses.h>
+
+#include <string>
+
+#pragma once
+
+namespace ui_utils {
+    void alert(WINDOW *win, const std::string &msg);
+    void print_base_screen(WINDOW *w);
+}