python: update symbol browser experiment

python/src/browse-all-symbols.py

@@ -1,50 +1,112 @@
 # Imports go at the top
 from microbit import *
 
-images: "list[str]" = [image for image in dir(Image) if image.isupper()]
-index: int = -1
-COUNT: int = len(images)
 
+class ImageBrowser:
+    LOGO: Image = Image.HAPPY
 
-def browse_left(index: int) -> int:
-    """Scroll carousel to the left.
+    PLAY: Image = Image(
+            "00000:"
+            "09900:"
+            "09090:"
+            "09900:"
+            "00000:"
+    )  # fmt: off
 
-    :param index: the current position
-    :return: the new position
-    """
-    return (index - 1) % COUNT
+    PAUSE: Image = Image(
+            "00000:"
+            "09090:"
+            "09090:"
+            "09090:"
+            "00000:"
+    )  # fmt: off
 
+    STOP: Image = Image(
+            "00000:"
+            "09990:"
+            "09090:"
+            "09990:"
+            "00000:"
+    )  # fmt: off
 
-def browse_right(index: int) -> int:
-    """Scroll carousel to the right.
+    FWD: Image = Image(
+            "00000:"
+            "90090:"
+            "99099:"
+            "90090:"
+            "00000:"
+    )  # fmt: off
 
-    :param index: the current position
-    :return: the new position
-    """
-    return (index + 1) % COUNT
+    BWD: Image = Image(
+            "00000:"
+            "09009:"
+            "99099:"
+            "09009:"
+            "00000:"
+    )  # fmt: off
+
+    def __init__(self) -> None:
+        """Initialize ."""
+
+        display.show(self.LOGO)
+        sleep(1_000)
+
+        self.index: int = 0
+        self.images: "list[str]" = [image for image in dir(Image) if image.isupper()]
+        self.image: str = self.images[self.index]
+        self.size: int = len(self.images)
+
+        print("INFO: images=" + str(self.images))
+
+    def browse_left(self) -> None:
+        """Scroll carousel to the left."""
+
+        self.index = (self.index - 1) % self.size
+        self.image = self.images[self.index]
+
+        self.show()
+
+    def browse_right(self) -> None:
+        """Scroll carousel to the right."""
+
+        self.index = (self.index + 1) % self.size
+        self.image = self.images[self.index]
+
+        self.show()
+
+    def show(self) -> None:
+        """Show the current image."""
+
+        print("INFO: image: " + self.image)
+        display.scroll(self.image)
+
+    def play(self) -> None:
+        """Play the current image."""
+
+        display.show(getattr(Image, self.image))
+
+
+print()
+print("Image Browser")
+print()
+
+app: ImageBrowser = ImageBrowser()
 
 
 # Code in a 'while True:' loop repeats forever
 while True:
-    display.show(Image.ARROW_E)
+    display.show(app.BWD)
     sleep(500)
-    display.show(Image.ARROW_W)
+    display.show(app.FWD)
     sleep(500)
 
-    if button_a.was_pressed():
-        index = browse_left(index)
-    elif button_b.was_pressed():
-        index = browse_right(index)
-
-    image: str
-
-    if index == -1:
-        image = "SAD"
-    else:
-        image = images[index]
-
-    print("INFO: image: " + image)
-    display.scroll(image)
-    display.show(getattr(Image, image))
+    app.show()
+    sleep(500)
 
+    app.play()
     sleep(1_000)
+
+    if button_a.was_pressed():
+        app.browse_left()
+    elif button_b.was_pressed():
+        app.browse_right()