import tkinter from typing import Union, Tuple, Callable, Optional, Any from .core_rendering import CTkCanvas from .theme import ThemeManager from .core_rendering import DrawEngine from .core_widget_classes import CTkBaseClass from .font import CTkFont from .image import CTkImage from .utility import pop_from_dict_by_set, check_kwargs_empty class CTkLabel(CTkBaseClass): """ Label with rounded corners. Default is fg_color=None (transparent fg_color). For detailed information check out the documentation. state argument will probably be removed because it has no effect """ # attributes that are passed to and managed by the tkinter entry only: _valid_tk_label_attributes = {"cursor", "justify", "padx", "pady", "textvariable", "state", "takefocus", "underline"} def __init__(self, master: Any, width: int = 0, height: int = 28, corner_radius: Optional[int] = None, bg_color: Union[str, Tuple[str, str]] = "transparent", fg_color: Optional[Union[str, Tuple[str, str]]] = None, text_color: Optional[Union[str, Tuple[str, str]]] = None, text_color_disabled: Optional[Union[str, Tuple[str, str]]] = None, text: str = "CTkLabel", font: Optional[Union[tuple, CTkFont]] = None, image: Union[CTkImage, None] = None, compound: str = "center", anchor: str = "center", # label anchor: center, n, e, s, w wraplength: int = 0, **kwargs): # transfer basic functionality (_bg_color, size, __appearance_mode, scaling) to CTkBaseClass super().__init__(master=master, bg_color=bg_color, width=width, height=height) # color self._fg_color = ThemeManager.theme["CTkLabel"]["fg_color"] if fg_color is None else self._check_color_type(fg_color, transparency=True) self._text_color = ThemeManager.theme["CTkLabel"]["text_color"] if text_color is None else self._check_color_type(text_color) if text_color_disabled is None: if "text_color_disabled" in ThemeManager.theme["CTkLabel"]: self._text_color_disabled = ThemeManager.theme["CTkLabel"]["text_color"] else: self._text_color_disabled = self._text_color else: self._text_color_disabled = self._check_color_type(text_color_disabled) # shape self._corner_radius = ThemeManager.theme["CTkLabel"]["corner_radius"] if corner_radius is None else corner_radius # text self._anchor = anchor self._text = text self._wraplength = wraplength # image self._image = self._check_image_type(image) self._compound = compound if isinstance(self._image, CTkImage): self._image.add_configure_callback(self._update_image) # font self._font = CTkFont() if font is None else self._check_font_type(font) if isinstance(self._font, CTkFont): self._font.add_size_configure_callback(self._update_font) # configure grid system (1x1) self.grid_rowconfigure(0, weight=1) self.grid_columnconfigure(0, weight=1) self._canvas = CTkCanvas(master=self, highlightthickness=0, width=self._apply_widget_scaling(self._desired_width), height=self._apply_widget_scaling(self._desired_height)) self._canvas.grid(row=0, column=0, sticky="nswe") self._draw_engine = DrawEngine(self._canvas) self._label = tkinter.Label(master=self, highlightthickness=0, padx=0, pady=0, borderwidth=0, anchor=self._anchor, compound=self._compound, wraplength=self._apply_widget_scaling(self._wraplength), text=self._text, font=self._apply_font_scaling(self._font)) self._label.configure(**pop_from_dict_by_set(kwargs, self._valid_tk_label_attributes)) check_kwargs_empty(kwargs, raise_error=True) self._create_grid() self._update_image() self._draw() def _set_scaling(self, *args, **kwargs): super()._set_scaling(*args, **kwargs) self._canvas.configure(width=self._apply_widget_scaling(self._desired_width), height=self._apply_widget_scaling(self._desired_height)) self._label.configure(font=self._apply_font_scaling(self._font)) self._label.configure(wraplength=self._apply_widget_scaling(self._wraplength)) self._create_grid() self._update_image() self._draw(no_color_updates=True) def _set_appearance_mode(self, mode_string): super()._set_appearance_mode(mode_string) self._update_image() def _set_dimensions(self, width=None, height=None): super()._set_dimensions(width, height) self._canvas.configure(width=self._apply_widget_scaling(self._desired_width), height=self._apply_widget_scaling(self._desired_height)) self._create_grid() self._draw() def _update_font(self): """ pass font to tkinter widgets with applied font scaling and update grid with workaround """ self._label.configure(font=self._apply_font_scaling(self._font)) # Workaround to force grid to be resized when text changes size. # Otherwise grid will lag and only resizes if other mouse action occurs. self._canvas.grid_forget() self._canvas.grid(row=0, column=0, sticky="nswe") def _update_image(self): if isinstance(self._image, CTkImage): self._label.configure(image=self._image.create_scaled_photo_image(self._get_widget_scaling(), self._get_appearance_mode())) elif self._image is not None: self._label.configure(image=self._image) def destroy(self): if isinstance(self._font, CTkFont): self._font.remove_size_configure_callback(self._update_font) super().destroy() def _create_grid(self): """ configure grid system (1x1) """ text_label_grid_sticky = self._anchor if self._anchor != "center" else "" self._label.grid(row=0, column=0, sticky=text_label_grid_sticky, padx=self._apply_widget_scaling(min(self._corner_radius, round(self._current_height / 2)))) def _draw(self, no_color_updates=False): super()._draw(no_color_updates) requires_recoloring = self._draw_engine.draw_rounded_rect_with_border(self._apply_widget_scaling(self._current_width), self._apply_widget_scaling(self._current_height), self._apply_widget_scaling(self._corner_radius), 0) if no_color_updates is False or requires_recoloring: if self._apply_appearance_mode(self._fg_color) == "transparent": self._canvas.itemconfig("inner_parts", fill=self._apply_appearance_mode(self._bg_color), outline=self._apply_appearance_mode(self._bg_color)) self._label.configure(fg=self._apply_appearance_mode(self._text_color), disabledforeground=self._apply_appearance_mode(self._text_color_disabled), bg=self._apply_appearance_mode(self._bg_color)) else: self._canvas.itemconfig("inner_parts", fill=self._apply_appearance_mode(self._fg_color), outline=self._apply_appearance_mode(self._fg_color)) self._label.configure(fg=self._apply_appearance_mode(self._text_color), disabledforeground=self._apply_appearance_mode(self._text_color_disabled), bg=self._apply_appearance_mode(self._fg_color)) self._canvas.configure(bg=self._apply_appearance_mode(self._bg_color)) def configure(self, require_redraw=False, **kwargs): if "corner_radius" in kwargs: self._corner_radius = kwargs.pop("corner_radius") self._create_grid() require_redraw = True if "fg_color" in kwargs: self._fg_color = self._check_color_type(kwargs.pop("fg_color"), transparency=True) require_redraw = True if "text_color" in kwargs: self._text_color = self._check_color_type(kwargs.pop("text_color")) require_redraw = True if "text_color_disabled" in kwargs: self._text_color_disabled = self._check_color_type(kwargs.pop("text_color_disabled")) require_redraw = True if "text" in kwargs: self._text = kwargs.pop("text") self._label.configure(text=self._text) if "font" in kwargs: if isinstance(self._font, CTkFont): self._font.remove_size_configure_callback(self._update_font) self._font = self._check_font_type(kwargs.pop("font")) if isinstance(self._font, CTkFont): self._font.add_size_configure_callback(self._update_font) self._update_font() if "image" in kwargs: if isinstance(self._image, CTkImage): self._image.remove_configure_callback(self._update_image) self._image = self._check_image_type(kwargs.pop("image")) if isinstance(self._image, CTkImage): self._image.add_configure_callback(self._update_image) self._update_image() if "compound" in kwargs: self._compound = kwargs.pop("compound") self._label.configure(compound=self._compound) if "anchor" in kwargs: self._anchor = kwargs.pop("anchor") self._label.configure(anchor=self._anchor) self._create_grid() if "wraplength" in kwargs: self._wraplength = kwargs.pop("wraplength") self._label.configure(wraplength=self._apply_widget_scaling(self._wraplength)) self._label.configure(**pop_from_dict_by_set(kwargs, self._valid_tk_label_attributes)) # configure tkinter.Label super().configure(require_redraw=require_redraw, **kwargs) # configure CTkBaseClass def cget(self, attribute_name: str) -> any: if attribute_name == "corner_radius": return self._corner_radius elif attribute_name == "fg_color": return self._fg_color elif attribute_name == "text_color": return self._text_color elif attribute_name == "text_color_disabled": return self._text_color_disabled elif attribute_name == "text": return self._text elif attribute_name == "font": return self._font elif attribute_name == "image": return self._image elif attribute_name == "compound": return self._compound elif attribute_name == "anchor": return self._anchor elif attribute_name == "wraplength": return self._wraplength elif attribute_name in self._valid_tk_label_attributes: return self._label.cget(attribute_name) # cget of tkinter.Label else: return super().cget(attribute_name) # cget of CTkBaseClass def bind(self, sequence: str = None, command: Callable = None, add: str = True): """ called on the tkinter.Label and tkinter.Canvas """ if not (add == "+" or add is True): raise ValueError("'add' argument can only be '+' or True to preserve internal callbacks") self._canvas.bind(sequence, command, add=True) self._label.bind(sequence, command, add=True) def unbind(self, sequence: str = None, funcid: Optional[str] = None): """ called on the tkinter.Label and tkinter.Canvas """ if funcid is not None: raise ValueError("'funcid' argument can only be None, because there is a bug in" + " tkinter and its not clear whether the internal callbacks will be unbinded or not") self._canvas.unbind(sequence, None) self._label.unbind(sequence, None) def focus(self): return self._label.focus() def focus_set(self): return self._label.focus_set() def focus_force(self): return self._label.focus_force()