G01_0350/venv_win32/Lib/site-packages/pythonwin/pywin/Demos/ocx/ocxserialtest.py

# ocxserialtest.py
#
# Sample that uses the mscomm OCX to talk to a serial
# device.

# Very simple -  queries a modem for ATI responses

import win32ui, win32uiole
import win32con
from pywin.mfc import dialog, activex
from win32com.client import gencache
import pythoncom

SERIAL_SETTINGS = '19200,n,8,1'
SERIAL_PORT = 2

win32ui.DoWaitCursor(1)
serialModule = gencache.EnsureModule("{648A5603-2C6E-101B-82B6-000000000014}", 0, 1, 1)
win32ui.DoWaitCursor(0)
if serialModule is None:
	raise ImportError("MS COMM Control does not appear to be installed on the PC")


def MakeDlgTemplate():
    style = win32con.DS_MODALFRAME | win32con.WS_POPUP \
            | win32con.WS_VISIBLE | win32con.WS_CAPTION \
            | win32con.WS_SYSMENU | win32con.DS_SETFONT
    cs = win32con.WS_CHILD | win32con.WS_VISIBLE
    dlg = [ ["Very Basic Terminal",
             (0, 0, 350, 180), style, None, (8, "MS Sans Serif")], ]
    s = win32con.WS_TABSTOP | cs
    dlg.append(["RICHEDIT", None, 132, (5, 5, 340, 170),s | win32con.ES_WANTRETURN | win32con.ES_MULTILINE | win32con.ES_AUTOVSCROLL | win32con.WS_VSCROLL])
    return dlg


####################################
#
# Serial Control
#
class MySerialControl(activex.Control, serialModule.MSComm):
	def __init__(self, parent):
		activex.Control.__init__(self)
		serialModule.MSComm.__init__(self)
		self.parent = parent
	def OnComm(self):
		self.parent.OnComm()

class TestSerDialog(dialog.Dialog):
	def __init__(self, *args):
		dialog.Dialog.__init__(*(self,)+args)
		self.olectl = None
	def OnComm(self):
		event = self.olectl.CommEvent
		if event == serialModule.OnCommConstants.comEvReceive:
			self.editwindow.ReplaceSel(self.olectl.Input)

	def OnKey(self, key):
		if self.olectl:
			self.olectl.Output = chr(key)

	def OnInitDialog(self):
		rc = dialog.Dialog.OnInitDialog(self)
		self.editwindow = self.GetDlgItem(132)
		self.editwindow.HookAllKeyStrokes(self.OnKey)

		self.olectl = MySerialControl(self)
		try:
			self.olectl.CreateControl("OCX",
			                          win32con.WS_TABSTOP | win32con.WS_VISIBLE,
			                          (7,43,500,300), self._obj_, 131)
		except win32ui.error:
			self.MessageBox("The Serial Control could not be created")
			self.olectl = None
			self.EndDialog(win32con.IDCANCEL)
		if self.olectl:			                        
			self.olectl.Settings = SERIAL_SETTINGS
			self.olectl.CommPort = SERIAL_PORT
			self.olectl.RThreshold = 1
			try:
				self.olectl.PortOpen = 1
			except pythoncom.com_error as details:
				print("Could not open the specified serial port - %s" % (details.excepinfo[2]))
				self.EndDialog(win32con.IDCANCEL)
		return rc

	def OnDestroy(self, msg):
		if self.olectl:
			try:
				self.olectl.PortOpen = 0
			except pythoncom.com_error as details:
				print("Error closing port - %s" % (details.excepinfo[2]))
		return dialog.Dialog.OnDestroy(self, msg)

def test():
    d = TestSerDialog(MakeDlgTemplate() )
    d.DoModal()

if __name__ == "__main__":
	from . import demoutils
	if demoutils.NeedGoodGUI():
		test()