horizontal scrollers and color shifters

pyproject.toml

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+# NOTE: you have to use single-quoted strings in TOML for regular expressions.
+# It's the equivalent of r-strings in Python.  Multiline strings are treated as
+# verbose regular expressions by Black.  Use [ ] to denote a significant space
+# character.
+
+[tool.black]
+line-length = 79
+target-version = ['py37', 'py38']
+include = '\.pyi?$'
+exclude = '''
+/(
+    \.eggs
+  | \.git
+  | \.hg
+  | \.mypy_cache
+  | \.tox
+  | \.venv
+  | _build
+  | buck-out
+  | build
+  | dist
+
+  # The following are specific to Black, you probably don't want those.
+  | blib2to3
+  | tests/data
+  | profiling
+)/
+'''

test

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+███████████████████████████████████████████████████████████████████████████████
+██╔════════════╗█╔════════════╗█╔════════════╗█╔════════════╗█╔════════════╗███
+██║ ▄▄▄▄   ▄▄▄ ║█║ ▄▄▄▄▄▄▄▄▄▄ ║█║ ██████████ ║█║ ██████████ ║█║ ██████████ ║███
+██║ ████  ████ ║█║ ██████████ ║█║ ██████████ ║█║ ▀▀▀▀▀▀▀▀▀▀ ║█║ ██████████ ║███
+██║ ████  ████ ║█║ ███    ███ ║█║ ██    ███▀ ║█║ ▄▄▄▄▄▄▄▄▄▄ ║█║ ███    ███ ║███
+██║ ████  ████ ║█║ ██████████ ║█║ ████████   ║█║   ██████   ║█║ ██████████ ║███
+██║ ████  ████ ║█║ ████▌▐████ ║█║ █████████  ║█║   ██████   ║█║ ████▌▐████ ║███
+██║ ▓███ ▄████ ║█║ ▓███▌▐████ ║█║ ▓███▌▐███  ║█║   ██████   ║█║ ▓███▌▐████ ║███
+██║ ▒▓███████▀ ║█║ ▒▓██▌▐████ ║█║ ▒▓██▌▐███  ║█║   ▓█████   ║█║ ▒▓██▌▐████ ║███
+██║ ░▒▓█████▀  ║█║ ░▒▓█▌▐████ ║█║ ░▒▓█▌▐████ ║█║ ░▒▓█████▄▄ ║█║ ░▒▓█▌▐████ ║███
+██╚════════════╝█╚════════════╝█╚════════════╝█╚════════════╝█╚════════════╝███
+███████████████████████████████████████████████████████████████████████████████

tombofdoom.py

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+import curses
+import time
+
+# Using readlines()
+file1 = open("test", "r")
+lines = file1.readlines()
+debug_text = False
+
+
+def show_debug_text(stdscr, width, height, start_x_file):
+    """debug text for the tomb of doom"""
+    whstr = "Width: {}, Height: {}".format(width, height)
+    stdscr.addstr(0, 0, whstr, curses.color_pair(1))
+    file_string = "X position of text: {}".format(start_x_file)
+    stdscr.addstr(1, 0, file_string, curses.color_pair(1))
+
+
+def draw_scroll(stdscr):
+    # Clear and refresh the screen for a blank screen
+    # Set delay to no, to not wait for keyboard press
+    stdscr.nodelay(1)
+    stdscr.clear()
+    stdscr.refresh()
+    start_x_file = 80
+    rotation = 1
+    # Start colors in curses
+    curses.start_color()
+    curses.init_pair(1, curses.COLOR_CYAN, curses.COLOR_BLACK)
+    curses.init_pair(2, curses.COLOR_RED, curses.COLOR_BLACK)
+    curses.init_pair(3, curses.COLOR_GREEN, curses.COLOR_BLACK)
+    curses.init_pair(4, curses.COLOR_BLUE, curses.COLOR_BLACK)
+    curses.init_pair(5, curses.COLOR_MAGENTA, curses.COLOR_BLACK)
+    curses.init_pair(6, curses.COLOR_YELLOW, curses.COLOR_BLACK)
+
+    while True:
+        # Loop where k is the last character pressed
+        stdscr.clear()
+        height, width = stdscr.getmaxyx()
+
+        # Declaration of strings
+        title = "Curses horizontal scroller test"[: width - 1]
+        subtitle = "Crunk Varia"[: width - 1]
+
+        hwidth = width // 2
+        # Centering calculations
+        start_x_title = int((hwidth) - (len(title) // 2) - len(title) % 2)
+        start_x_subtitle = int(
+            (hwidth) - (len(subtitle) // 2) - len(subtitle) % 2
+        )
+        start_y = int((height) - 2)
+        if debug_text:
+            show_debug_text(stdscr, width, height, start_x_file)
+
+        line_count = 0
+        for line in lines:
+            ch_count = 0
+            for character in line:
+                if (
+                    ch_count + start_x_file < width
+                    and ch_count + start_x_file > 0
+                ):
+                    stdscr.addch(
+                        3 + line_count,
+                        start_x_file + ch_count,
+                        character,
+                        curses.color_pair(rotation),
+                    )
+                ch_count += 1
+            line_count += 1
+
+        # Turning on attributes for title
+        stdscr.attron(curses.color_pair(2))
+        stdscr.attron(curses.A_BOLD)
+
+        # Rendering title
+        stdscr.addstr(start_y, start_x_title, title)
+
+        # Turning off attributes for title
+        stdscr.attroff(curses.color_pair(2))
+        stdscr.attroff(curses.A_BOLD)
+
+        stdscr.addstr(start_y + 1, start_x_subtitle, subtitle)
+        # Refresh the screen
+        stdscr.refresh()
+        time.sleep(1.0 / 30)
+
+        start_x_file -= 1
+        if start_x_file < -80:
+            start_x_file = 80
+            rotation += 1
+            if rotation > 6:
+                rotation = 1
+
+        key_pressed = stdscr.getch() != -1
+        if key_pressed:
+            raise KeyboardInterrupt()
+
+
+def main():
+    curses.wrapper(draw_scroll)
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        curses.endwin()
+        curses.curs_set(1)
+        curses.reset_shell_mode()
+        curses.echo()