| 1 | def HasColor(name, default=None, doc=None): |
| 2 | propname = "__color_{}".format(name) |
| 3 | colors = { |
| 4 | "black": 0x00000000, |
| 5 | "white": 0x00ffffff, |
| 6 | "red": 0x00ff0000, |
| 7 | "green": 0x0000ff00, |
| 8 | "blue": 0x000000ff |
| 9 | } |
| 10 | |
| 11 | def getter(self): |
| 12 | return getattr(self, propname, default) |
| 13 | |
| 14 | def setter(self, value): |
| 15 | if isinstance(value, int): |
| 16 | if isinstance(value, bool): |
| 17 | raise TypeError("integer colors must be ints") |
| 18 | |
| 19 | if value < 0 or value > 0x00ffffff: |
| 20 | raise ValueError("integer colors must be 24-bit") |
| 21 | |
| 22 | setattr(self, propname, value) |
| 23 | elif isinstance(value, str): |
| 24 | if value not in colors: |
| 25 | raise ValueError("unknown color '{}'".format(value)) |
| 26 | |
| 27 | setattr(self, propname, colors[value]) |
| 28 | else: |
| 29 | raise TypeError("color specifications must be ints or strs") |
| 30 | |
| 31 | class Inner: |
| 32 | pass |
| 33 | |
| 34 | setattr(Inner, name, property(getter, setter, None, doc)) |
| 35 | return Inner |
| 36 | |
| 37 | |
| 38 | class Canvas(HasColor("foreground"), HasColor("background")): |