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92 lines
3.7 KiB
92 lines
3.7 KiB
2 years ago
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from tkinter.font import Font
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import copy
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from typing import List, Callable, Tuple, Optional
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try:
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from typing import Literal
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except ImportError:
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from typing_extensions import Literal
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from ..theme import ThemeManager
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class CTkFont(Font):
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"""
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Font object with size in pixel, independent of scaling.
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To get scaled tuple representation use create_scaled_tuple() method.
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family The font family name as a string.
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size The font height as an integer in pixel.
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weight 'bold' for boldface, 'normal' for regular weight.
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slant 'italic' for italic, 'roman' for unslanted.
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underline 1 for underlined text, 0 for normal.
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overstrike 1 for overstruck text, 0 for normal.
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Tkinter Font: https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/fonts.html
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"""
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def __init__(self,
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family: Optional[str] = None,
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size: Optional[int] = None,
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weight: Literal["normal", "bold"] = None,
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slant: Literal["italic", "roman"] = "roman",
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underline: bool = False,
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overstrike: bool = False):
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self._size_configure_callback_list: List[Callable] = []
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self._size = ThemeManager.theme["CTkFont"]["size"] if size is None else size
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super().__init__(family=ThemeManager.theme["CTkFont"]["family"] if family is None else family,
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size=-abs(self._size),
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weight=ThemeManager.theme["CTkFont"]["weight"] if weight is None else weight,
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slant=slant,
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underline=underline,
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overstrike=overstrike)
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self._family = super().cget("family")
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self._tuple_style_string = f"{super().cget('weight')} {slant} {'underline' if underline else ''} {'overstrike' if overstrike else ''}"
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def add_size_configure_callback(self, callback: Callable):
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""" add function, that gets called when font got configured """
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self._size_configure_callback_list.append(callback)
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def remove_size_configure_callback(self, callback: Callable):
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""" remove function, that gets called when font got configured """
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self._size_configure_callback_list.remove(callback)
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def create_scaled_tuple(self, font_scaling: float) -> Tuple[str, int, str]:
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""" return scaled tuple representation of font in the form (family: str, size: int, style: str)"""
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return self._family, round(-abs(self._size) * font_scaling), self._tuple_style_string
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def config(self, *args, **kwargs):
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raise AttributeError("'config' is not implemented for CTk widgets. For consistency, always use 'configure' instead.")
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def configure(self, **kwargs):
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if "size" in kwargs:
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self._size = kwargs.pop("size")
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super().configure(size=-abs(self._size))
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if "family" in kwargs:
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super().configure(family=kwargs.pop("family"))
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self._family = super().cget("family")
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super().configure(**kwargs)
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# update style string for create_scaled_tuple() method
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self._tuple_style_string = f"{super().cget('weight')} {super().cget('slant')} {'underline' if super().cget('underline') else ''} {'overstrike' if super().cget('overstrike') else ''}"
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# call all functions registered with add_size_configure_callback()
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for callback in self._size_configure_callback_list:
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callback()
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def cget(self, attribute_name: str) -> any:
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if attribute_name == "size":
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return self._size
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if attribute_name == "family":
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return self._family
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else:
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return super().cget(attribute_name)
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def copy(self) -> "CTkFont":
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return copy.deepcopy(self)
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