import tkinter import sys from typing import Union, Tuple, Callable, Optional 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 class CTkButton(CTkBaseClass): """ Button with rounded corners, border, hover effect, image support, click command and textvariable. For detailed information check out the documentation. """ _image_label_spacing: int = 6 def __init__(self, master: any, width: int = 140, height: int = 28, corner_radius: Optional[int] = None, border_width: Optional[int] = None, border_spacing: int = 2, bg_color: Union[str, Tuple[str, str]] = "transparent", fg_color: Optional[Union[str, Tuple[str, str]]] = None, hover_color: Optional[Union[str, Tuple[str, str]]] = None, border_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, background_corner_colors: Union[Tuple[Union[str, Tuple[str, str]]], None] = None, round_width_to_even_numbers: bool = True, round_height_to_even_numbers: bool = True, text: str = "CTkButton", font: Optional[Union[tuple, CTkFont]] = None, textvariable: Union[tkinter.Variable, None] = None, image: Union[tkinter.PhotoImage, CTkImage, None] = None, state: str = "normal", hover: bool = True, command: Union[Callable[[], None], None] = None, compound: str = "left", anchor: str = "center", **kwargs): # transfer basic functionality (bg_color, size, appearance_mode, scaling) to CTkBaseClass super().__init__(master=master, bg_color=bg_color, width=width, height=height, **kwargs) # shape self._corner_radius: int = ThemeManager.theme["CTkButton"]["corner_radius"] if corner_radius is None else corner_radius self._corner_radius = min(self._corner_radius, round(self._current_height / 2)) self._border_width: int = ThemeManager.theme["CTkButton"]["border_width"] if border_width is None else border_width self._border_spacing: int = border_spacing # color self._fg_color: Union[str, Tuple[str, str]] = ThemeManager.theme["CTkButton"]["fg_color"] if fg_color is None else self._check_color_type(fg_color, transparency=True) self._hover_color: Union[str, Tuple[str, str]] = ThemeManager.theme["CTkButton"]["hover_color"] if hover_color is None else self._check_color_type(hover_color) self._border_color: Union[str, Tuple[str, str]] = ThemeManager.theme["CTkButton"]["border_color"] if border_color is None else self._check_color_type(border_color) self._text_color: Union[str, Tuple[str, str]] = ThemeManager.theme["CTkButton"]["text_color"] if text_color is None else self._check_color_type(text_color) self._text_color_disabled: Union[str, Tuple[str, str]] = ThemeManager.theme["CTkButton"]["text_color_disabled"] if text_color_disabled is None else self._check_color_type(text_color_disabled) # rendering options self._background_corner_colors: Union[Tuple[Union[str, Tuple[str, str]]], None] = background_corner_colors # rendering options for DrawEngine self._round_width_to_even_numbers: bool = round_width_to_even_numbers # rendering options for DrawEngine self._round_height_to_even_numbers: bool = round_height_to_even_numbers # rendering options for DrawEngine # text, font self._text = text self._text_label: Union[tkinter.Label, None] = None self._textvariable: tkinter.Variable = textvariable self._font: Union[tuple, CTkFont] = 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) # image self._image = self._check_image_type(image) self._image_label: Union[tkinter.Label, None] = None if isinstance(self._image, CTkImage): self._image.add_configure_callback(self._update_image) # other self._state: str = state self._hover: bool = hover self._command: Callable = command self._compound: str = compound self._anchor: str = anchor self._click_animation_running: bool = False # canvas and draw engine 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, rowspan=5, columnspan=5, sticky="nsew") self._draw_engine = DrawEngine(self._canvas) self._draw_engine.set_round_to_even_numbers(self._round_width_to_even_numbers, self._round_height_to_even_numbers) # rendering options # configure cursor and initial draw self._create_bindings() self._set_cursor() self._draw() def _create_bindings(self, sequence: Optional[str] = None): """ set necessary bindings for functionality of widget, will overwrite other bindings """ if sequence is None or sequence == "": self._canvas.bind("", self._on_enter) if sequence is None or sequence == "": self._canvas.bind("", self._on_leave) if sequence is None or sequence == "": self._canvas.bind("", self._clicked) def _set_scaling(self, *args, **kwargs): super()._set_scaling(*args, **kwargs) self._create_grid() if self._text_label is not None: self._text_label.configure(font=self._apply_font_scaling(self._font)) self._update_image() self._canvas.configure(width=self._apply_widget_scaling(self._desired_width), height=self._apply_widget_scaling(self._desired_height)) 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: int = None, height: int = 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._draw() def _update_font(self): """ pass font to tkinter widgets with applied font scaling and update grid with workaround """ if self._text_label is not None: self._text_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, rowspan=5, columnspan=5, sticky="nsew") def _update_image(self): if self._image_label is not None: self._image_label.configure(image=self._image.create_scaled_photo_image(self._get_widget_scaling(), self._get_appearance_mode())) def destroy(self): if isinstance(self._font, CTkFont): self._font.remove_size_configure_callback(self._update_font) super().destroy() def _draw(self, no_color_updates=False): super()._draw(no_color_updates) if self._background_corner_colors is not None: self._draw_engine.draw_background_corners(self._apply_widget_scaling(self._current_width), self._apply_widget_scaling(self._current_height)) self._canvas.itemconfig("background_corner_top_left", fill=self._apply_appearance_mode(self._background_corner_colors[0])) self._canvas.itemconfig("background_corner_top_right", fill=self._apply_appearance_mode(self._background_corner_colors[1])) self._canvas.itemconfig("background_corner_bottom_right", fill=self._apply_appearance_mode(self._background_corner_colors[2])) self._canvas.itemconfig("background_corner_bottom_left", fill=self._apply_appearance_mode(self._background_corner_colors[3])) else: self._canvas.delete("background_parts") 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), self._apply_widget_scaling(self._border_width)) if no_color_updates is False or requires_recoloring: self._canvas.configure(bg=self._apply_appearance_mode(self._bg_color)) # set color for the button border parts (outline) self._canvas.itemconfig("border_parts", outline=self._apply_appearance_mode(self._border_color), fill=self._apply_appearance_mode(self._border_color)) # set color for inner button parts if self._fg_color == "transparent": self._canvas.itemconfig("inner_parts", outline=self._apply_appearance_mode(self._bg_color), fill=self._apply_appearance_mode(self._bg_color)) else: self._canvas.itemconfig("inner_parts", outline=self._apply_appearance_mode(self._fg_color), fill=self._apply_appearance_mode(self._fg_color)) # create text label if text given if self._text is not None and self._text != "": if self._text_label is None: self._text_label = tkinter.Label(master=self, font=self._apply_font_scaling(self._font), text=self._text, padx=0, pady=0, borderwidth=1, textvariable=self._textvariable) self._create_grid() self._text_label.bind("", self._on_enter) self._text_label.bind("", self._on_leave) self._text_label.bind("", self._clicked) self._text_label.bind("", self._clicked) if no_color_updates is False: # set text_label fg color (text color) self._text_label.configure(fg=self._apply_appearance_mode(self._text_color)) if self._state == tkinter.DISABLED: self._text_label.configure(fg=(self._apply_appearance_mode(self._text_color_disabled))) else: self._text_label.configure(fg=self._apply_appearance_mode(self._text_color)) if self._apply_appearance_mode(self._fg_color) == "transparent": self._text_label.configure(bg=self._apply_appearance_mode(self._bg_color)) else: self._text_label.configure(bg=self._apply_appearance_mode(self._fg_color)) else: # delete text_label if no text given if self._text_label is not None: self._text_label.destroy() self._text_label = None self._create_grid() # create image label if image given if self._image is not None: if self._image_label is None: self._image_label = tkinter.Label(master=self) self._update_image() # set image self._create_grid() self._image_label.bind("", self._on_enter) self._image_label.bind("", self._on_leave) self._image_label.bind("", self._clicked) self._image_label.bind("", self._clicked) if no_color_updates is False: # set image_label bg color (background color of label) if self._apply_appearance_mode(self._fg_color) == "transparent": self._image_label.configure(bg=self._apply_appearance_mode(self._bg_color)) else: self._image_label.configure(bg=self._apply_appearance_mode(self._fg_color)) else: # delete text_label if no text given if self._image_label is not None: self._image_label.destroy() self._image_label = None self._create_grid() def _create_grid(self): """ configure grid system (5x5) """ # Outer rows and columns have weight of 1000 to overpower the rows and columns of the label and image with weight 1. # Rows and columns of image and label need weight of 1 to collapse in case of missing space on the button, # so image and label need sticky option to stick together in the center, and therefore outer rows and columns # need weight of 100 in case of other anchor than center. n_padding_weight, s_padding_weight, e_padding_weight, w_padding_weight = 1000, 1000, 1000, 1000 if self._anchor != "center": if "n" in self._anchor: n_padding_weight, s_padding_weight = 0, 1000 if "s" in self._anchor: n_padding_weight, s_padding_weight = 1000, 0 if "e" in self._anchor: e_padding_weight, w_padding_weight = 1000, 0 if "w" in self._anchor: e_padding_weight, w_padding_weight = 0, 1000 scaled_minsize_rows = self._apply_widget_scaling(max(self._border_width + 1, self._border_spacing)) scaled_minsize_columns = self._apply_widget_scaling(max(self._corner_radius, self._border_width + 1, self._border_spacing)) self.grid_rowconfigure(0, weight=n_padding_weight, minsize=scaled_minsize_rows) self.grid_rowconfigure(4, weight=s_padding_weight, minsize=scaled_minsize_rows) self.grid_columnconfigure(0, weight=e_padding_weight, minsize=scaled_minsize_columns) self.grid_columnconfigure(4, weight=w_padding_weight, minsize=scaled_minsize_columns) if self._compound in ("right", "left"): self.grid_rowconfigure(2, weight=1) if self._image_label is not None and self._text_label is not None: self.grid_columnconfigure(2, weight=0, minsize=self._apply_widget_scaling(self._image_label_spacing)) else: self.grid_columnconfigure(2, weight=0) self.grid_rowconfigure((1, 3), weight=0) self.grid_columnconfigure((1, 3), weight=1) else: self.grid_columnconfigure(2, weight=1) if self._image_label is not None and self._text_label is not None: self.grid_rowconfigure(2, weight=0, minsize=self._apply_widget_scaling(self._image_label_spacing)) else: self.grid_rowconfigure(2, weight=0) self.grid_columnconfigure((1, 3), weight=0) self.grid_rowconfigure((1, 3), weight=1) if self._compound == "right": if self._image_label is not None: self._image_label.grid(row=2, column=3, sticky="w") if self._text_label is not None: self._text_label.grid(row=2, column=1, sticky="e") elif self._compound == "left": if self._image_label is not None: self._image_label.grid(row=2, column=1, sticky="e") if self._text_label is not None: self._text_label.grid(row=2, column=3, sticky="w") elif self._compound == "top": if self._image_label is not None: self._image_label.grid(row=1, column=2, sticky="s") if self._text_label is not None: self._text_label.grid(row=3, column=2, sticky="n") elif self._compound == "bottom": if self._image_label is not None: self._image_label.grid(row=3, column=2, sticky="n") if self._text_label is not None: self._text_label.grid(row=1, column=2, sticky="s") 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 "border_width" in kwargs: self._border_width = kwargs.pop("border_width") self._create_grid() require_redraw = True if "border_spacing" in kwargs: self._border_spacing = kwargs.pop("border_spacing") 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 "hover_color" in kwargs: self._hover_color = self._check_color_type(kwargs.pop("hover_color")) require_redraw = True if "border_color" in kwargs: self._border_color = self._check_color_type(kwargs.pop("border_color")) 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 "background_corner_colors" in kwargs: self._background_corner_colors = kwargs.pop("background_corner_colors") require_redraw = True if "text" in kwargs: self._text = kwargs.pop("text") if self._text_label is None: require_redraw = True # text_label will be created in .draw() else: self._text_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 "textvariable" in kwargs: self._textvariable = kwargs.pop("textvariable") if self._text_label is not None: self._text_label.configure(textvariable=self._textvariable) 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) require_redraw = True if "state" in kwargs: self._state = kwargs.pop("state") self._set_cursor() require_redraw = True if "hover" in kwargs: self._hover = kwargs.pop("hover") if "command" in kwargs: self._command = kwargs.pop("command") if "compound" in kwargs: self._compound = kwargs.pop("compound") require_redraw = True if "anchor" in kwargs: self._anchor = kwargs.pop("anchor") require_redraw = True super().configure(require_redraw=require_redraw, **kwargs) def cget(self, attribute_name: str) -> any: if attribute_name == "corner_radius": return self._corner_radius elif attribute_name == "border_width": return self._border_width elif attribute_name == "border_spacing": return self._border_spacing elif attribute_name == "fg_color": return self._fg_color elif attribute_name == "hover_color": return self._hover_color elif attribute_name == "border_color": return self._border_color elif attribute_name == "text_color": return self._text_color elif attribute_name == "text_color_disabled": return self._text_color_disabled elif attribute_name == "background_corner_colors": return self._background_corner_colors elif attribute_name == "text": return self._text elif attribute_name == "font": return self._font elif attribute_name == "textvariable": return self._textvariable elif attribute_name == "image": return self._image elif attribute_name == "state": return self._state elif attribute_name == "hover": return self._hover elif attribute_name == "command": return self._command elif attribute_name == "compound": return self._compound elif attribute_name == "anchor": return self._anchor else: return super().cget(attribute_name) def _set_cursor(self): if self._cursor_manipulation_enabled: if self._state == tkinter.DISABLED: if sys.platform == "darwin" and self._command is not None: self.configure(cursor="arrow") elif sys.platform.startswith("win") and self._command is not None: self.configure(cursor="arrow") elif self._state == tkinter.NORMAL: if sys.platform == "darwin" and self._command is not None: self.configure(cursor="pointinghand") elif sys.platform.startswith("win") and self._command is not None: self.configure(cursor="hand2") def _on_enter(self, event=None): if self._hover is True and self._state == "normal": if self._hover_color is None: inner_parts_color = self._fg_color else: inner_parts_color = self._hover_color # set color of inner button parts to hover color self._canvas.itemconfig("inner_parts", outline=self._apply_appearance_mode(inner_parts_color), fill=self._apply_appearance_mode(inner_parts_color)) # set text_label bg color to button hover color if self._text_label is not None: self._text_label.configure(bg=self._apply_appearance_mode(inner_parts_color)) # set image_label bg color to button hover color if self._image_label is not None: self._image_label.configure(bg=self._apply_appearance_mode(inner_parts_color)) def _on_leave(self, event=None): self._click_animation_running = False if self._fg_color == "transparent": inner_parts_color = self._bg_color else: inner_parts_color = self._fg_color # set color of inner button parts self._canvas.itemconfig("inner_parts", outline=self._apply_appearance_mode(inner_parts_color), fill=self._apply_appearance_mode(inner_parts_color)) # set text_label bg color (label color) if self._text_label is not None: self._text_label.configure(bg=self._apply_appearance_mode(inner_parts_color)) # set image_label bg color (image bg color) if self._image_label is not None: self._image_label.configure(bg=self._apply_appearance_mode(inner_parts_color)) def _click_animation(self): if self._click_animation_running: self._on_enter() def _clicked(self, event=None): if self._state != tkinter.DISABLED: # click animation: change color with .on_leave() and back to normal after 100ms with click_animation() self._on_leave() self._click_animation_running = True self.after(100, self._click_animation) if self._command is not None: self._command() def invoke(self): """ calls command function if button is not disabled """ if self._state != tkinter.DISABLED: if self._command is not None: return self._command() def bind(self, sequence: str = None, command: Callable = None, add: Union[str, bool] = True): """ called on the 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._text_label.bind(sequence, command, add=True) def unbind(self, sequence: str = None, funcid: 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._text_label.unbind(sequence, None) self._create_bindings(sequence=sequence) # restore internal callbacks for sequence def focus(self): return self._text_label.focus() def focus_set(self): return self._text_label.focus_set() def focus_force(self): return self._text_label.focus_force()