callisto/display/font_manager.py

from PIL import ImageFont

class FontManager:
    def __init__(self, size=10):
        self.font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", size)

    def draw_multiline_text(self, draw, text, x, y, width, height):
        lines = []
        words = text.split()
        line = ""
        for word in words:
            test_line = line + word + " "
            if draw.textlength(test_line, font=self.font) <= width:
                line = test_line
            else:
                lines.append(line)
                line = word + " "
        lines.append(line)

        for i, l in enumerate(lines):
            draw.text((x, y + i * (self.font.size + 2)), l, font=self.font, fill=255)