127 lines
3.9 KiB
Python
Executable file
127 lines
3.9 KiB
Python
Executable file
"""
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PyPortal Calculator Demo
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"""
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import time
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from collections import namedtuple
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import board
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import displayio
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from adafruit_display_text.label import Label
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from adafruit_bitmap_font import bitmap_font
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from adafruit_display_shapes.rect import Rect
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from adafruit_button import Button
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from calculator import Calculator
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import adafruit_touchscreen
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Coords = namedtuple("Point", "x y")
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ts = adafruit_touchscreen.Touchscreen(board.TOUCH_XL, board.TOUCH_XR,
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board.TOUCH_YD, board.TOUCH_YU,
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calibration=((5200, 59000), (5800, 57000)),
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size=(320, 240))
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# Settings
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BUTTON_WIDTH = 60
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BUTTON_HEIGHT = 30
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BUTTON_MARGIN = 8
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MAX_DIGITS = 29
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BLACK = 0x0
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ORANGE = 0xFF8800
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WHITE = 0xFFFFFF
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GRAY = 0x888888
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LABEL_OFFSET = 290
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# Make the display context
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calc_group = displayio.Group(max_size=25)
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board.DISPLAY.show(calc_group)
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# Make a background color fill
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color_bitmap = displayio.Bitmap(320, 240, 1)
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color_palette = displayio.Palette(1)
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color_palette[0] = GRAY
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bg_sprite = displayio.TileGrid(color_bitmap,
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pixel_shader=color_palette,
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x=0, y=0)
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calc_group.append(bg_sprite)
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# Load the font
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font = bitmap_font.load_font("/fonts/Arial-12.bdf")
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buttons = []
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# Some button placement functions
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def button_grid(row, col):
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return Coords(BUTTON_MARGIN * (row + 1) + BUTTON_WIDTH * row + 20,
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BUTTON_MARGIN * (col + 1) + BUTTON_HEIGHT * col + 40)
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def make_button(row, col, label, width=1, color=WHITE, text_color=BLACK):
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pos = button_grid(row, col)
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new_button = Button(x=pos.x, y=pos.y,
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width=BUTTON_WIDTH * width + BUTTON_MARGIN * (width - 1),
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height=BUTTON_HEIGHT, label=label, label_font=font,
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label_color=text_color, fill_color=color, style=Button.ROUNDRECT)
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buttons.append(new_button)
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return new_button
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border = Rect(20, 8, 280, 35, fill=WHITE, outline=BLACK, stroke=2)
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calc_display = Label(font, text="0", color=BLACK, max_glyphs=MAX_DIGITS)
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calc_display.y = 25
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clear_button = make_button(0, 0, "AC")
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make_button(1, 0, "+/-")
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make_button(2, 0, "%")
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make_button(3, 0, "/", 1, ORANGE, WHITE)
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make_button(0, 1, "7")
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make_button(1, 1, "8")
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make_button(2, 1, "9")
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make_button(3, 1, "x", 1, ORANGE, WHITE)
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make_button(0, 2, "4")
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make_button(1, 2, "5")
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make_button(2, 2, "6")
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make_button(3, 2, "-", 1, ORANGE, WHITE)
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make_button(0, 3, "1")
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make_button(1, 3, "2")
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make_button(2, 3, "3")
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make_button(3, 3, "+", 1, ORANGE, WHITE)
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make_button(0, 4, "0", 2)
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make_button(2, 4, ".")
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make_button(3, 4, "=", 1, ORANGE, WHITE)
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def find_button(label):
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result = None
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for i, b in enumerate(buttons):
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if b.label == label:
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result = b
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return result
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# Add the display and buttons to the main calc group
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calc_group.append(border)
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calc_group.append(calc_display)
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for b in buttons:
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calc_group.append(b.group)
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calculator = Calculator(calc_display, clear_button, LABEL_OFFSET)
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button = ""
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while True:
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point = ts.touch_point
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if point is not None:
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# Button Down Events
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for i, b in enumerate(buttons):
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if b.contains(point) and button == "":
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b.selected = True
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button = b.label
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elif button != "":
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# Button Up Events
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last_op = calculator.get_current_operator()
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op_button = find_button(last_op)
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# Deselect the last operation when certain buttons are pressed
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if op_button is not None:
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if button in ('=', 'AC', 'CE'):
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op_button.selected = False
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elif button in ('+', '-', 'x', '/') and button != last_op:
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op_button.selected = False
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calculator.add_input(button)
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b = find_button(button)
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if b is not None:
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if button not in ('+', '-', 'x', '/') or button != calculator.get_current_operator():
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b.selected = False
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button = ""
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time.sleep(0.05)
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