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