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

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+# 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()