[not-a-bug][help-wanted] How to change border colors of selected buttons

[strawberry-code]

I am trying to change the color of the borders of the button which the cursor is pointing on.

I am trying by this without success:

def render(self):
      for key in self.master.get_widgets().keys():
          if self.master.get_widgets()[key].is_selected():
              self.master.get_widgets()[key].set_color(py_cui.RED_ON_BLACK)
          else:
              self.master.get_widgets()[key].set_color(py_cui.CYAN_ON_BLACK)

I kindly ask for little help here. What's wrong? If it is possibile to achieve it...

In the picture below I would the button "Show Yes No Popup" be colored in RED_ON_BLACK.

[jwlodek]

How are you calling the above function? By default, py_cui interfaces will only re-draw when an action is performed (key press, mouse press). If you want that function to be run periodically, you can use the set_on_draw_update_func() to run the render function on every draw call, and then unlock periodic re-draw of the screen with set_refresh_timeout(). Note that the function set with set_on_draw_update_func() is fired at the start of the draw loop, before the new widget is considered selected.

It may be worthwhile to allow for setting a function to fire per draw call both at the start and end - that would simplify this