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"""Demo of screen and cursor commands."""
from easyansi import colors as c
from easyansi import screen as s
from easyansi import cursor as cur
from easyansi import drawing as d
from easyansi.screen import prnt
DEFAULT_COLOR = c.color_code(c.WHITE, c.BLACK)
HEADING_COLOR = c.color_code(c.BRIGHT_YELLOW, c.BLACK)
SUB_HEADING_COLOR = c.color_code(c.BRIGHT_RED, c.BLACK)
PAGE_NUM_COLOR = c.color_code(c.BRIGHT_GREEN, c.BLACK)
LINE_COLOR = c.color_code(c.BRIGHT_BLUE, c.BLACK)
FOOTER_COLOR = c.color_code(c.BRIGHT_WHITE, c.BLACK)
SCREEN_WIDTH, SCREEN_HEIGHT = s.get_size()
HEADING = "Screen and Cursor Commands Demo"
TOTAL_PAGES = 1
def main():
try:
screen_cursor_demo()
except KeyboardInterrupt:
# The user pressed Ctrl+C to get here
pass
finally:
# Return the terminal to the users default state
c.reset()
print("\nCompleted")
def pause():
cur.locate(0, SCREEN_HEIGHT - 1)
prnt(FOOTER_COLOR)
input("Press ENTER to continue, or CTRL+C to quit ")
def clear_screen(sub_heading, page_num):
global SCREEN_WIDTH, SCREEN_HEIGHT
SCREEN_WIDTH, SCREEN_HEIGHT = s.get_size()
prnt(DEFAULT_COLOR)
# When you clear the screen, it will set the whole screen to the current
# foreground and background color that is currently set.
s.clear()
prnt(HEADING_COLOR + HEADING + ": ")
prnt(SUB_HEADING_COLOR + sub_heading)
page_text = str(page_num) + " / " + str(TOTAL_PAGES)
cur.locate(SCREEN_WIDTH - len(page_text), 0)
prnt(PAGE_NUM_COLOR + page_text)
cur.locate(0, 1)
prnt(LINE_COLOR)
d.hline(SCREEN_WIDTH)
cur.locate(0, SCREEN_HEIGHT - 2)
d.hline(SCREEN_WIDTH)
def screen_cursor_demo():
label_color = c.color_code(c.CYAN, c.BLACK)
field_color = c.color_code(c.WHITE, c.BLACK)
note_color = c.color_code(c.GREEN, c.BLACK)
col_1 = 0
col_2 = 39
clear_screen("Main", 1)
current_row = 2
# Demo getting the screen size
cur.locate(col_1, current_row)
screen_width, screen_height = s.get_size()
prnt(label_color + "Screen Size:")
cur.locate(col_2, current_row)
prnt(field_color + "x=" + str(screen_width) + ", y=" + str(screen_height))
# Demo getting the cursor location
current_row += 1
cur.locate(39, 19)
prnt(c.color_code(c.BRIGHT_YELLOW, c.BLACK))
prnt("*")
cur.left()
cursor_x, cursor_y = cur.get_location()
cur.locate(col_1, current_row)
prnt(label_color + "Cursor Location at * :")
cur.locate(col_2, current_row)
prnt(field_color + "x=" + str(cursor_x) + ", y=" + str(cursor_y))
prnt(note_color + " (should be x=39, y=19)")
# Demo clearing a line
c.color(c.RED)
cur.locate(0, 15)
d.hline(80, char="=")
cur.locate(0, 18)
d.hline(80, char="=")
cur.locate(0, 16)
c.color(c.WHITE)
prnt("You should not see this text.")
cur.locate(0, 17)
prnt("You should also not see this text.")
cur.locate(40, 16)
s.clear_line(16) # clears specified line
s.clear_line(17) # clears specified line
cursor_x, cursor_y = cur.get_location()
current_row += 1
cur.locate(col_1, current_row)
prnt(label_color + "No text should appear between the red lines below.")
current_row += 1
cur.locate(col_1, current_row)
prnt(label_color + "Clear Line Position:")
cur.locate(col_2, current_row)
prnt(field_color + "x=" + str(cursor_x) + ", y=" + str(cursor_y))
prnt(note_color + " (should be x=0, y=17)")
# Demo locating a specific column
cur.locate(0, 1)
cur.locate_column(70)
cursor_x, cursor_y = cur.get_location()
current_row += 1
cur.locate(col_1, current_row)
prnt(label_color + "Locate Column Position:")
cur.locate(col_2, current_row)
prnt(field_color + "x=" + str(cursor_x) + ", y=" + str(cursor_y))
prnt(note_color + " (should be x=70, y=1)")
# Demo locating the next line
cur.locate(70, 10)
cur.next_line(2)
cursor_x, cursor_y = cur.get_location()
current_row += 1
cur.locate(col_1, current_row)
prnt(label_color + "Next Line Column Position:")
cur.locate(col_2, current_row)
prnt(field_color + "x=" + str(cursor_x) + ", y=" + str(cursor_y))
prnt(note_color + " (should be x=0, y=12)")
# Demo locating the previous line
cur.locate(70, 10)
cur.previous_line(2)
cursor_x, cursor_y = cur.get_location()
current_row += 1
cur.locate(col_1, current_row)
prnt(label_color + "Previous Line Column Position:")
cur.locate(col_2, current_row)
prnt(field_color + "x=" + str(cursor_x) + ", y=" + str(cursor_y))
prnt(note_color + " (should be x=0, y=8)")
pause()
if __name__ == "__main__":
main()
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