Merge pull request #1260 from jedgarpark/pixel_art_slideshow

first commit

Author: makermelissa

Pixel_Art_Slideshow/bmps/adabot.bmp

@@ -0,0 +1,66 @@
+"""
+Slideshow Example using the Matrix Portal and 64 x 32 LED matrix display
+Written by Melissa LeBlanc-Williams for Adafruit Industries
+Images smaller than 64 pixel width will be aligned alternating left or right
+Press Up button to pause/resume Slideshow
+Press Down button to advance
+"""
+import time
+import board
+from digitalio import DigitalInOut, Pull
+from adafruit_matrixportal.matrix import Matrix
+from adafruit_slideshow import SlideShow, PlayBackDirection, HorizontalAlignment
+from adafruit_debouncer import Debouncer
+
+IMAGE_DURATION = 3
+IMAGE_FOLDER = "/bmps"
+
+# --- Display setup ---
+matrix = Matrix(bit_depth=6)
+display = matrix.display
+
+pin_down = DigitalInOut(board.BUTTON_DOWN)
+pin_down.switch_to_input(pull=Pull.UP)
+button_down = Debouncer(pin_down)
+pin_up = DigitalInOut(board.BUTTON_UP)
+pin_up.switch_to_input(pull=Pull.UP)
+button_up = Debouncer(pin_up)
+
+align_right = True
+auto_advance = True
+
+slideshow = SlideShow(
+    display,
+    None,
+    folder=IMAGE_FOLDER,
+    order=0,
+    auto_advance=False,
+    fade_effect=False,
+    dwell=IMAGE_DURATION,
+    h_align=HorizontalAlignment.RIGHT,
+)
+last_advance = time.monotonic()
+
+
+def advance():
+    # pylint: disable=global-statement
+    global align_right, last_advance
+    align_right = not align_right
+    if align_right:
+        slideshow.h_align = HorizontalAlignment.RIGHT
+    else:
+        slideshow.h_align = HorizontalAlignment.LEFT
+    last_advance = time.monotonic()
+    slideshow.advance()
+
+
+while True:
+    if auto_advance and time.monotonic() > last_advance + IMAGE_DURATION:
+        advance()
+    button_down.update()
+    button_up.update()
+    if button_up.fell:
+        auto_advance = not auto_advance
+    if button_down.fell:
+        slideshow.direction = PlayBackDirection.FORWARD
+        advance()