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.venv/Lib/site-packages/pythonwin/pywin/Demos/app/dlgappdemo.py

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+# dlgappdemo - a demo of a dialog application.
+# This is a demonstration of both a custom "application" module,
+# and a Python program in a dialog box.
+#
+# NOTE:  You CAN NOT import this module from either PythonWin or Python.
+# This module must be specified on the commandline to PythonWin only.
+# eg, PythonWin /app dlgappdemo.py
+
+from pywin.framework import dlgappcore, app
+import win32ui
+import sys
+
+
+class TestDialogApp(dlgappcore.DialogApp):
+    def CreateDialog(self):
+        return TestAppDialog()
+
+
+class TestAppDialog(dlgappcore.AppDialog):
+    def __init__(self):
+        self.edit = None
+        dlgappcore.AppDialog.__init__(self, win32ui.IDD_LARGE_EDIT)
+
+    def OnInitDialog(self):
+        self.SetWindowText("Test dialog application")
+        self.edit = self.GetDlgItem(win32ui.IDC_EDIT1)
+        print("Hello from Python")
+        print("args are:", end=" ")
+        for arg in sys.argv:
+            print(arg)
+        return 1
+
+    def PreDoModal(self):
+        sys.stdout = sys.stderr = self
+
+    def write(self, str):
+        if self.edit:
+            self.edit.SetSel(-2)
+            # translate \n to \n\r
+            self.edit.ReplaceSel(str.replace("\n", "\r\n"))
+        else:
+            win32ui.OutputDebug("dlgapp - no edit control! >>\n%s\n<<\n" % str)
+
+
+app.AppBuilder = TestDialogApp
+
+if __name__ == "__main__":
+    import demoutils
+
+    demoutils.NeedApp()