Hackerradio/musikautomat/display.py

#!./bin/python3

import yaml
import pygame # type: ignore

# Color constants

BLACK = (0, 0, 0) 
GREEN = (0, 255, 0) 

class Display:
    '''
    Display object
    '''
    def __init__(self, config, pydsp):
        
        # Set config values
        
        self._dx = config.get("dimx", 128)
        self._dy = config.get("dimy", 160)
        self._playlistFile = config.get("playlist", "music.yml")
        self._pydsp = pydsp # Pygame display object
        self._fontsize = config.get("fontsize", 12)

        # Set initialisation values

        self._selection_pointer = 0 # Current selected value


    def update(self):
        '''
        Load the data from the given config file.
        '''
        playlist = yaml.safe_load(open(self._playlistFile))

        font = pygame.font.Font('freesansbold.ttf', self._fontsize)
        drawline = 0 # Line currently drawm

        for i, item in enumerate(playlist.get("playlist", [])):
            print(item["name"])

            if drawline == self._selection_pointer:
                text = font.render(item["name"], True, BLACK, GREEN)
            else:
                text = font.render(item["name"], True, GREEN, BLACK)
            
            self._pydsp.blit(text, (0, drawline * self._fontsize))
            drawline += 1