Add serial searching

I am not quite sure how to structure this program. I put the serial
object in the Application object, but it seems that over time the
MainWin class will just have a million initialization parameters.

__main__.py

@@ -1,6 +1,4 @@
-import wx
-import mainwin
+from app import App
 
-app = wx.App(False)
-mainwin.MainWin()
+app = App()
 app.MainLoop()

app.py

@@ -0,0 +1,14 @@
+import wx
+import serial
+from mainwin import MainWin
+
+class App(wx.App):
+	def serial_setup(self, port):
+		self.ser.port = port
+		print(self.ser.port)
+
+	def __init__(self):
+		wx.App.__init__(self, False)
+		self.ser = serial.Serial(baudrate=115200)
+
+		self.win = MainWin(self.serial_setup)

mainwin.py

@@ -1,31 +1,16 @@
 import wx
+from sercomm import SerialMenu
+import serial
 
 class MainWin(wx.Frame):
-	def __init__(self):
+	def __init__(self, serconn):
 		wx.Frame.__init__(self, None, wx.ID_ANY, "Dagon Controller")
 
-		self.main_sizer = wx.BoxSizer(wx.VERTICAL)
+		self.ser = serial.Serial(baudrate=115200)
 
-		# Top buttons
-		self.top_sizer = wx.BoxSizer(wx.HORIZONTAL)
-		self.plan_btn = wx.Button(self, label="Plan",
-			style=wx.BU_EXACTFIT)
-		self.conn_btn = wx.Button(self, label="(Re)Connect",
-			style=wx.BU_EXACTFIT)
-		self.ser_sel = wx.Choice(self, choices=["(none)"])
-
-		for i in (self.plan_btn, self.conn_btn):
-			self.top_sizer.Add(i, 0, wx.EXPAND)
-		self.top_sizer.Add(self.ser_sel, 1, wx.EXPAND)
-
-		self.main_sizer.Add(self.top_sizer, 0, wx.EXPAND)
-
-		self.commbox = wx.TextCtrl(self, style=
-			wx.TE_MULTILINE | wx.TE_READONLY | wx.TE_RICH2)
-
-		self.main_sizer.Add(self.commbox, 1, wx.EXPAND)
-		self.SetSizer(self.main_sizer)
-		self.SetAutoLayout(1)
-		self.main_sizer.Fit(self)
+		serial_menu = SerialMenu(serconn)
+		menubar = wx.MenuBar()
+		menubar.Append(serial_menu, "&Serial")
+		self.SetMenuBar(menubar)
 
 		self.Show(True)

sercomm.py

@@ -0,0 +1,42 @@
+import wx
+import serial
+from serial.tools.list_ports import comports
+
+def repr_and_name(v):
+	s = v.device
+	for i in (v.name, v.description, v.hwid):
+		if i != "n/a":
+			s = f"{s} - {i}"
+	return (v.device, s)
+def repr_and_name_list():
+	return [repr_and_name(x) for x in comports()]
+
+class SerialSelector(wx.MenuItem):
+	def __init__(self, parent, port, disp):
+		wx.MenuItem.__init__(self, parent, wx.ID_ANY, disp)
+		self.port = port
+
+class SerialMenu(wx.Menu):
+	def _refresh_devices(self, _):
+		for i in self.devices:
+			self.Bind(wx.EVT_MENU, None, i)
+			self.Delete(i)
+		self.devices = []
+
+		for (nm, listing) in repr_and_name_list():
+			x = SerialSelector(self, nm, listing)
+			self.devices.append(x)
+			self.Append(x)
+			self.Bind(wx.EVT_MENU, lambda _ : self.serconn(x.port),
+				x)
+
+	def __init__(self, serconn):
+		wx.Menu.__init__(self)
+		self.invar = [
+			self.Append(wx.ID_ANY, "&Refresh", "Refresh devices"),
+			self.AppendSeparator()
+		]
+		self.Bind(wx.EVT_MENU, self._refresh_devices, self.invar[0])
+		self.devices = []
+		self.serconn = serconn
+		self._refresh_devices(None)