ignore hidden files first. ignore non .json files. remove extra slash in _file_list items. Update simpletest

Author: FoamyGuy

adafruit_slideshow.py

@@ -46,7 +46,6 @@
 import json
 import displayio
 
-
 try:
     from adafruit_display_text import bitmap_label
     import terminalio
@@ -202,13 +201,14 @@ def __init__(
     ):
         def _check_json_file(file):
             if TEXT_SLIDES_ENABLED:
-                with open(file) as _file_obj:
-                    try:
-                        json_data = json.loads(_file_obj.read())
-                        if "text" in json_data:
-                            return True
-                    except ValueError:
-                        return False
+                if file.endswith(".json"):
+                    with open(file) as _file_obj:
+                        try:
+                            json_data = json.loads(_file_obj.read())
+                            if "text" in json_data:
+                                return True
+                        except ValueError:
+                            return False
             return False
 
         self.loop = loop
@@ -233,11 +233,11 @@ def _check_json_file(file):
         # Load the image names before setting order so they can be reordered.
         self._img_start = None
         self._file_list = [
-            folder + "/" + f
+            folder + f
             for f in os.listdir(folder)
             if (
-                (f.endswith(".bmp") or _check_json_file(folder + "/" + f))
-                and not f.startswith(".")
+                not f.startswith(".")
+                and (f.endswith(".bmp") or _check_json_file(folder + f))
             )
         ]
 

examples/slideshow_simpletest.py

@@ -1,14 +1,19 @@
+"""Basic demonstration script will create a slideshow
+object that plays through once alphabetically."""
 import board
-import pulseio
 from adafruit_slideshow import PlayBackOrder, SlideShow
 
+# use built in display (PyPortal, PyGamer, PyBadge, CLUE, etc.)
+# see guide for setting up external displays (TFT / OLED breakouts, RGB matrices, etc.)
+# https://learn.adafruit.com/circuitpython-display-support-using-displayio/display-and-display-bus
+display = board.DISPLAY
+
 # pylint: disable=no-member
 
-# Create the slideshow object that plays through once alphabetically.
 slideshow = SlideShow(
     board.DISPLAY,
-    pulseio.PWMOut(board.TFT_BACKLIGHT),
-    folder="/",
+    None,
+    folder="/images/",
     loop=False,
     order=PlayBackOrder.ALPHABETICAL,
 )