Add decorator to redraw window

This commit adds a decorator that will handle redrawing of gui.

The pattern sizer.clear() ... pnl.SetupScrolling() and
sizer.layout() is very common and easy to handle with a decorator.

src/main.py

@@ -15,6 +15,23 @@ class PassUi(wx.Frame):
     The wx.Frame for passui
     """
 
+    def redraw(*args):
+        """Decorator used for redrawing the widgets in the sizer
+
+        Returns:
+            function: The decorated function
+        """
+        func = args[0]
+
+        def wrapper(self, *wrapper_args):
+            """The wrapper function for the decorator
+            """
+            self.sizer.Clear(delete_windows=True)
+            func(self, *wrapper_args)
+            self.sizer.Layout()
+
+        return wrapper
+
     def __init__(self, *args, **kw):
         """__init__.
 
@@ -31,9 +48,9 @@ class PassUi(wx.Frame):
         self.pnl.SetSizer(self.sizer)
         self.add_buttons()
 
+    @redraw
     def add_buttons(self):
         """add_buttons."""
-        self.sizer.Clear(delete_windows=True)
         self.add_tools()
         if self.pass_handler.cur_dir != self.pass_handler.top_dir:
             btn = self.make_back_button()
@@ -63,7 +80,6 @@ class PassUi(wx.Frame):
                       btn)
             index = index + 1
         self.pnl.SetupScrolling()
-        self.sizer.Layout()
 
     def add_push_pull(self):
         """add_push_pull."""
@@ -185,11 +201,11 @@ class PassUi(wx.Frame):
         self.pass_handler.save_to_pass(password, path, fullpath)
         self.back_button_clicked()
 
+    @redraw
     def show_new_dialog(self):
         """show_new_dialog.
 
         """
-        self.sizer.Clear(delete_windows=True)
         passpath = self.pass_handler.cur_dir.replace(self.pass_handler.top_dir, '')
         btn = self.make_back_button()
         self.sizer.Add(btn, 0, wx.EXPAND)  # pylint: disable=no-member
@@ -216,15 +232,14 @@ class PassUi(wx.Frame):
                   save_to_pass(path, mtext, mname),
                   sbtn)
         self.pnl.SetupScrolling()
-        self.sizer.Layout()
         name.SetFocus()
 
+    @redraw
     def show_password_dialog(self, index):
         """show_password_dialog.
 
         :param index:
         """
-        self.sizer.Clear(delete_windows=True)
         self.add_tools(index)
 
         passpath = self.pass_handler.get_pass_path_from_index(index, "password")
@@ -256,14 +271,13 @@ class PassUi(wx.Frame):
             lambda event, mindex=index: self.delete_password(mindex),
             dbtn)
         self.pnl.SetupScrolling()
-        self.sizer.Layout()
 
+    @redraw
     def show_password(self, index):
         """show_password.
 
         :param index:
         """
-        self.sizer.Clear(delete_windows=True)
         self.add_tools(index)
         passpath = self.pass_handler.get_pass_path_from_index(index, "password")
         cpath = self.pass_handler.top_dir + os.path.dirname(passpath)
@@ -291,14 +305,13 @@ class PassUi(wx.Frame):
                       path, mtext),
                   sbtn)
         self.pnl.SetupScrolling()
-        self.sizer.Layout()
 
+    @redraw
     def show_tools(self, index=None):
         """show_tools.
 
         :param index:
         """
-        self.sizer.Clear(delete_windows=True)
         btn = wx.Button(self.pnl, label="Go back")
         font = btn.GetFont().MakeBold()
         btn.SetFont(font)
@@ -315,7 +328,6 @@ class PassUi(wx.Frame):
                   nbtn)
         self.add_push_pull()
         self.pnl.SetupScrolling()
-        self.sizer.Layout()
 
 
 if __name__ == '__main__':