Add core.py with base UI

core.py

@@ -0,0 +1,72 @@
+import gi
+gi.require_version("Gtk", "3.0")
+
+from gi.repository import Gtk
+
+class main_window(Gtk.Window):
+    def __init__(self):
+        super().__init__(title = "CxNewsletter JSON creator")
+        
+        self.connect("destroy", Gtk.main_quit)
+
+        self.content = Gtk.Grid()
+        self.content.set_column_spacing(4)
+        self.content.set_row_spacing(4)
+        self.content.set_column_homogeneous(False)
+        self.add(self.content)
+        
+        self.input = Gtk.FileChooserButton()
+        self.input.set_width_chars(20)
+        self.input.set_title("Select XLSX file")
+        self.content.attach(self.input, 0, 0, 2, 1)
+
+        input_label = Gtk.Label()
+        input_label.set_label("Select XLSX")
+        self.content.attach(input_label, 0, 1, 2, 1)
+
+        self.output = Gtk.FileChooserButton()
+        self.output.set_width_chars(20)
+        self.input.set_title("Select output JSON")
+        self.content.attach(self.output, 2, 0, 2, 1)
+
+        output_label = Gtk.Label()
+        output_label.set_label("Select JSON")
+        self.content.attach(output_label, 2, 1, 2, 1)
+
+        self.convert = Gtk.Button()
+        self.convert.set_label("Convert")
+        self.content.attach(self.convert, 0, 2, 4, 1)    
+
+        name_column = Gtk.Label()
+        name_column.set_width_chars(40)
+        name_column.set_xalign(1)
+        name_column.set_label("Select column with names and surnames")
+        self.content.attach(name_column, 6, 0, 1, 1)
+
+        self.name_column = Gtk.ComboBoxText()
+        self.content.attach(self.name_column, 7, 0, 1, 1)
+
+        email_column = Gtk.Label()
+        email_column.set_width_chars(40)
+        email_column.set_xalign(1)
+        email_column.set_label("Select column with e-mails")
+        self.content.attach(email_column, 6, 1, 1, 1)
+
+        self.email_column = Gtk.ComboBoxText()
+        self.email_column.set_popup_fixed_width(200)
+        self.content.attach(self.email_column, 7, 1, 1, 1)
+
+        phone_column = Gtk.Label()
+        phone_column.set_width_chars(40)
+        phone_column.set_xalign(1)
+        phone_column.set_label("Select column with phone numbers")
+        self.content.attach(phone_column, 6, 2, 1, 1)
+        
+        self.phone_column = Gtk.ComboBoxText()
+        self.content.attach(self.phone_column, 7, 2, 1, 1)
+
+if __name__ == "__main__":
+    app = main_window()
+    app.show_all()
+
+    Gtk.main()