User interface skeleton

nomadnet/ui/TextUI.py

@@ -0,0 +1,39 @@
+import RNS
+from nomadnet import NomadNetworkApp
+import importlib
+
+class TextUI:
+
+    def __init__(self):
+        self.app = NomadNetworkApp.get_shared_instance()
+
+        self.loop = None
+        self.main_widget = None
+
+        if importlib.util.find_spec("urwid") != None:
+            import urwid
+        else:
+            RNS.log("The text-mode user interface requires Urwid to be installed on your system.", RNS.LOG_ERROR)
+            RNS.log("You can install it with the command: pip3 install urwid", RNS.LOG_ERROR)
+            nomadnet.panic()
+
+        loop = urwid.MainLoop(self.build_intro())
+        loop.run()
+
+    def build_intro(self):
+        import urwid
+
+        font = urwid.font.HalfBlock5x4Font()
+
+        big_text = "Nomad Network"
+        big_text = urwid.BigText(("intro_bigtext", big_text), font)
+        big_text = urwid.Padding(big_text, align="center", width="clip")
+
+        intro = urwid.Pile([
+            big_text,
+            urwid.Text(["Version %s" % (str(self.app.version))], align="center"),
+            urwid.Divider(),
+            urwid.Text(("intro_smalltext", "-= Starting =-"), align="center"),
+        ])
+
+        return urwid.Filler(intro)