chutney/character_display.py

# There are 4 different types of patterns used when generating a digit that is
# to be placed in a rectangle 3X5 pixels. Combinations of these are used to
# create a number pattern such as:
#   * * *
#   *
#   * * *
#   *   *
#   * * *
#
# 1) * * * Full Row
# 2) *   * Both Sides
# 3)     * Right Side
# 4) *     Left Side
class CharacterDisplay:

    def __init__(self, unicorn, minX=0, maxX=15):
        self.unicorn = unicorn
        self.minX = minX
        self.maxX = maxX
        self.black = [0, 0, 0]

        self.digits = {
            0: self.displayZero,
            1: self.displayOne,
            2: self.displayTwo,
            3: self.displayThree,
            4: self.displayFour,
            5: self.displayFive,
            6: self.displaySix,
            7: self.displaySeven,
            8: self.displayEight,
            9: self.displayNine
        }

    def displayDigit(self, x, y, digit, color):
        self.clearDigit(x, y)
        self.digits[digit](x, y, color)
        self.unicorn.show()

    def clearDigit(self, x, y):
        for y1 in range(y, y-5, -1):
            for x1 in range(x, x+3):
                self.setPixel(x1, y1, self.black)

        self.unicorn.show()

    def displayTimeDots(self, x, y, color):
        self.setPixel(x, y, self.black)
        self.setPixel(x, y-1, color)
        self.setPixel(x, y-2, self.black)
        self.setPixel(x, y-3, color)
        self.setPixel(x, y-4, self.black)
        self.unicorn.show()

    def displayZero(self, x, y, color):
        self.fullLine(x, y, color)
        self.bothSides(x, y-1, color)
        self.bothSides(x, y-2, color)
        self.bothSides(x, y-3, color)
        self.fullLine(x, y-4, color)

    def displayOne(self, x, y, color):
        self.rightSide(x, y, color)
        self.rightSide(x, y-1, color)
        self.rightSide(x, y-2, color)
        self.rightSide(x, y-3, color)
        self.rightSide(x, y-4, color)

    def displayTwo(self, x, y, color):
        self.fullLine(x, y, color)
        self.rightSide(x, y-1, color)
        self.fullLine(x, y-2, color)
        self.leftSide(x, y-3, color)
        self.fullLine(x, y-4, color)

    def displayThree(self, x, y, color):
        self.fullLine(x, y, color)
        self.rightSide(x, y-1, color)
        self.fullLine(x, y-2, color)
        self.rightSide(x, y-3, color)
        self.fullLine(x, y-4, color)

    def displayFour(self, x, y, color):
        self.bothSides(x, y, color)
        self.bothSides(x, y-1, color)
        self.fullLine(x, y-2, color)
        self.rightSide(x, y-3, color)
        self.rightSide(x, y-4, color)

    def displayFive(self, x, y, color):
        self.fullLine(x, y, color)
        self.leftSide(x, y-1, color)
        self.fullLine(x, y-2, color)
        self.rightSide(x, y-3, color)
        self.fullLine(x, y-4, color)

    def displaySix(self, x, y, color):
        self.fullLine(x, y, color)
        self.leftSide(x, y-1, color)
        self.fullLine(x, y-2, color)
        self.bothSides(x, y-3, color)
        self.fullLine(x, y-4, color)

    def displaySeven(self, x, y, color):
        self.fullLine(x, y, color)
        self.rightSide(x, y-1, color)
        self.rightSide(x, y-2, color)
        self.rightSide(x, y-3, color)
        self.rightSide(x, y-4, color)

    def displayEight(self, x, y, color):
        self.fullLine(x, y, color)
        self.bothSides(x, y-1, color)
        self.fullLine(x, y-2, color)
        self.bothSides(x, y-3, color)
        self.fullLine(x, y-4, color)

    def displayNine(self, x, y, color):
        self.fullLine(x, y, color)
        self.bothSides(x, y-1, color)
        self.fullLine(x, y-2, color)
        self.rightSide(x, y-3, color)
        self.fullLine(x, y-4, color)

    def fullLine(self, start, row, color):
        for x in range(start, start+3):
            self.setPixel(x, row, color)

    def bothSides(self, start, row, color):
        self.setPixel(start, row, color)
        self.setPixel(start+2, row, color)

    def leftSide(self, start, row, color):
        self.setPixel(start, row, color)

    def rightSide(self, start, row, color):
        self.setPixel(start+2, row, color)

    def setPixel(self, x, y, color):
        if x >= self.minX and x <= self.maxX:
            self.unicorn.set_pixel(x, y, *color)