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# SPDX-License-Identifier: LGPL-3.0-or-later
# Copyright (C) 2020 Johannes Wache
"""Calculator
~~~~~~~~~~~~~
This is a simple calculator app that uses the build-in eval() function to
compute the solution.
.. figure:: res/CalcApp.png
:width: 179
"""
import wasp, fonts
# 2-bit RLE, generated from res/calc.png, 413 bytes
calc = (
b'\x02'
b'`@'
b'(@\x03P?\x0eV?\x08[?\x04_?\x01b'
b'<f9h7j5l3n1p/r-t'
b'+H\xd1D\xd1H*H\xd2B\xd2H)I\xd2B'
b"\xd2I'J\xd2B\xd2I'J\xc8\xc2\xc8B\xd2J"
b'%K\xc7\xc1\x02\xc1\xc7B\xd2J%K\xc7\xc1\x02\xc2'
b'\xc6B\xd2K$K\xc5\xc2\xc1\x02\xc1\xc2\xc5B\xd2K'
b'#L\xc4\xc1\x08\xc1\xc4B\xc5\x08\xc5L"L\xc4\xc1'
b'\x08\xc2\xc3B\xc5\x08\xc1\xc1\xc3L"L\xc5\xc2\xc1\x02'
b'\xc8B\xcf\xc1\xc2L!M\xc6\xc2\x02\xc8B\xd0\xc1\xc1'
b'M M\xc7\xc1\x02\xc8B\xd1\xc1M M\xc8\xc2\xc8'
b'B\xd2M M\xc9\xc1\xc8B\xd2M M\xd2B\xd2'
b'M M\xd2B\xd2M N\xd0D\xd0N \x7f\x01'
b' \x7f\x01 N\xd0D\xc1\xcfN M\xd2B\xc1\xd1'
b'M M\xd2B\xd2AL M\xd2B\xd2AL '
b'M\xd2B\xd2AL M\xc7\xc1\xcaB\xc5\xc8\xc5A'
b'L M\xc5\xc1\x02\xc2\x02\xc1\xc5B\xc4\xc1\x08\xc1\xc4'
b'AL!L\xc5\xc1\x06\xc1\xc5B\xc4\xc1\x08\xc1\xc1\xc3'
b'AK"L\xc6\xc1\x04\xc1\xc6B\xc6\xca\xc2AK"'
b'L\xc6\xc1\x04\xc1\xc6B\xc7\xca\xc1L#K\xc5\xc1\x06'
b'\xc1\xc5B\xc4\xc1\x08\xc1\xc4JA$K\xc5\xc1\x02\xc2'
b'\x02\xc1\xc5B\xc4\xc1\x08\xc1\xc4K%J\xc6\xc2\xc2\xc2'
b"\xc6B\xc5\xc8\xc5J&J\xd2B\xc6\xccJ'I\xd2"
b'B\xc7\xcbI(I\xd2B\xc8\xcaI)H\xd2B\xc9'
b'\xc9H*H\xd1D\xc9\xc8H+t-r/p1'
b'n3l5j7h9f<b?\x01^?\x05'
b'XAA?\tV?\x0eP(')
fields = ( '789+('
'456-)'
'123*^'
'C0./=' )
class CalculatorApp():
NAME = 'Calc'
ICON = calc
def __init__(self):
self.output = ""
def foreground(self):
self._draw()
self._update()
wasp.system.request_event(wasp.EventMask.TOUCH)
def touch(self, event):
if (event[2] < 48):
if (event[1] > 200): # undo button pressed
if (self.output != ""):
self.output = self.output[:-1]
else:
x = event[1] // 47
y = (event[2] // 48) - 1
# Error handling for touching at the border
if x > 4:
x = 4
if y > 3:
y = 3
button_pressed = fields[x + 5*y]
if (button_pressed == "C"):
self.output = ""
elif (button_pressed == "="):
try:
self.output = str(eval(self.output.replace('^', '**')))[:12]
except:
wasp.watch.vibrator.pulse()
else:
self.output += button_pressed
self._update()
def _draw(self):
draw = wasp.watch.drawable
hi = wasp.system.theme('bright')
lo = wasp.system.theme('mid')
mid = draw.lighten(lo, 2)
bg = draw.darken(wasp.system.theme('ui'), wasp.system.theme('contrast'))
bg2 = draw.darken(bg, 2)
# Draw the background
draw.fill(0, 0, 0, 239, 47)
draw.fill(0, 236, 239, 3)
draw.fill(bg, 141, 48, 239-141, 235-48)
draw.fill(bg2, 0, 48, 140, 235-48)
# Make grid:
draw.set_color(lo)
for i in range(4):
# horizontal lines
draw.line(x0=0,y0=(i+1)*47,x1=239,y1=(i+1)*47)
# vertical lines
draw.line(x0=(i+1)*47,y0=47,x1=(i+1)*47,y1=235)
draw.line(x0=0, y0=47, x1=0, y1=236)
draw.line(x0=239, y0=47, x1=239, y1=236)
draw.line(x0=0, y0=236, x1=239, y1=236)
# Draw button labels
draw.set_color(hi, bg2)
for x in range(5):
if x == 3:
draw.set_color(mid, bg)
for y in range(4):
label = fields[x + 5*y]
if (x == 0):
draw.string(label, x*47+14, y*47+60)
else:
draw.string(label, x*47+16, y*47+60)
draw.set_color(hi)
draw.string("<", 215, 10)
def _update(self):
output = self.output if len(self.output) < 12 else self.output[len(self.output)-12:]
wasp.watch.drawable.string(output, 0, 14, width=200, right=True)
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