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Description:

pihatwidget 1.4.1

PIHAT Widgets
About
The purpose of this module is to provide a set of programmable visual gadgets designed to make learning programming more fun.
Rather than just creating data and displaying text on the screen you can create traffic light sequences or display number countdown sequences or even create your own color pixelated grid.
The module contains three gadgets

LedMatrix
TrafficLight
LEDCharacter
LEDMultiCharacter

Details
All control have to be called from within the scope of a main clause:
def main():
# Do something with a pihat control

if __name__ == "__main__":

main()

Safely creating widgets
When you create a widget you should always call the close() method when you are complete otherwise the widget may continue to display on the screen.
light = TrafficLight()
light.set_state("100")
light.close()

Another way to do the same thing that will automatically close the widget would be to do this instead:
with TrafficLight() as light:
light.set_state("100")

LedMatrix
Displays an LED grid of lights. The colour of each light can be controlled using an RGB tuple
if __name__ == "__main__":
import pihat_widget as ph
import time
# Create the Matrix with 8 rows and columns at screen pos 5, 5 (x, y)
matrix = ph.LEDMatrix(rows = 8, cols = 8, origin_x = 5, origin_y = 5)
matrix.clear() # Clear all pixels
red_color = 255, 0, 0 # RGB red
black_color = 0, 0, 0 # RGB Black
# Set the pixel at (x, y) pos 0, 0 the RGB color red
matrix.set_pixel(x = 0, y = 0, color = red_color)
time.sleep(5) # Sleep for 5 seconds
matrix.set_pixel(x = 0, y = 0, color = black_color)
matrix.set_pixel(x=0, y=1, color=red_color)
time.sleep(3)
matrix.close()```

set_pixel(x, y , color)
Sets the color of a pixel. color is an rgb tuple
set_pixels(matrix)
Pass a two dimensional array or rgb color tuples
For a 2 x 2 board the top left pixel would be yellow and the bottom right red.
The other pixels would be black
matrix = [ [ (255,255,0), (0, 0, 0) ], [(0, 0, 0), (255,0,0) ]]
board.set_pixels(matrix)

To simplify the tuple you could also code:
matrix = [ [ (255,255,0), 0 ], [0, 255]]
board.set_pixels(matrix)

set_pixels_color(matrix, color)
Pass a two dimensional array of bit flags and a color parameter.
For a 2 x 2 board the top left pixel would be yellow and the bottom right red.
The other pixels would be black
matrix = [ [ 1, 0 ], [0, 1]]
board.set_pixels_color(matrix, (255,0, 0))

TrafficLight
if __name__ == "__main__":
import pihat_widget as ph
import time

light = ph.TrafficLight()
count =0
while count<1:
light.set_state("100")

time.sleep(5)
light.set_state("110")
time.sleep(2.7)
light.set_state("001")
time.sleep(5)
light.set_state("010")
time.sleep(2.7)
count+=1
light.close()

LEDCharacter
Creates a single character segmented numeric display.
Set the number property to display the number
if __name__ == "__main__":
import pihat_widget as ph
import time

c = ph.LEDCharacter(x = 150, y = 150)
for i in range(10):
c.Number = i
time.sleep(0.5)
time.sleep(3)
c.close()

LEDMultiCharacter
Creates a multi character segmented numeric display.
Set the number property to display the number
if __name__ == "__main__":
import pihat_widget as ph
import time

c = ph.LEDMultiCharacter(digits = 3, y=120)
for i in range(105):
c.Number =i
c.close()