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