import tkinter import sys from math import ceil, floor from .customtkinter_frame import CTkFrame from .appearance_mode_tracker import AppearanceModeTracker from .customtkinter_color_manager import CTkColorManager class CTkButton(tkinter.Frame): """ tkinter custom button with border, rounded corners and hover effect """ def __init__(self, bg_color=None, fg_color=CTkColorManager.MAIN, hover_color=CTkColorManager.MAIN_HOVER, border_color=None, border_width=0, command=None, width=120, height=32, corner_radius=8, text_font=None, text_color=CTkColorManager.TEXT, text="CTkButton", hover=True, image=None, compound=tkinter.LEFT, state=tkinter.NORMAL, *args, **kwargs): super().__init__(*args, **kwargs) AppearanceModeTracker.add(self.set_appearance_mode) self.appearance_mode = AppearanceModeTracker.get_mode() # 0: "Light" 1: "Dark" self.configure_basic_grid() self.bg_color = self.detect_color_of_master() if bg_color is None else bg_color self.fg_color = self.bg_color if fg_color is None else fg_color self.fg_color = self.bg_color if self.fg_color is None else self.fg_color self.hover_color = self.fg_color if hover_color is None else hover_color self.border_color = border_color self.width = width self.height = height self.corner_radius = self.calc_optimal_corner_radius(corner_radius) # optimise for less artifacts if self.corner_radius * 2 > self.height: self.corner_radius = self.height / 2 elif self.corner_radius * 2 > self.width: self.corner_radius = self.width / 2 self.border_width = round(border_width) # round border_width (inner parts not centered otherwise) if self.corner_radius >= self.border_width: self.inner_corner_radius = self.corner_radius - self.border_width else: self.inner_corner_radius = 0 self.text = text self.text_color = text_color if text_font is None: if sys.platform == "darwin": # macOS self.text_font = ("Avenir", 13) elif "win" in sys.platform: # Windows self.text_font = ("Century Gothic", 11) else: self.text_font = "TkDefaultFont" else: self.text_font = text_font self.function = command self.state = state self.hover = hover self.image = image self.compound = compound self.configure(width=self.width, height=self.height) if sys.platform == "darwin" and self.function is not None: self.configure(cursor="pointinghand") # other cursor when hovering over button with command self.canvas = tkinter.Canvas(master=self, highlightthicknes=0, width=self.width, height=self.height) self.canvas.grid(row=0, column=0, rowspan=2, columnspan=2) if self.hover is True: self.canvas.bind("", self.on_enter) self.canvas.bind("", self.on_leave) self.canvas.bind("", self.clicked) self.canvas.bind("", self.clicked) self.text_label = None self.image_label = None # Each time an item is resized due to pack position mode, the binding Configure is called on the widget self.bind('', self.update_dimensions) self.draw() def configure_basic_grid(self): # Configuration of a basic grid (2x2) in which all elements of CTkButtons are centered on one row and one column self.grid_rowconfigure(0, weight=1) self.grid_columnconfigure(0, weight=1) self.grid_rowconfigure(1, weight=1) self.grid_columnconfigure(1, weight=1) def update_dimensions(self, event): # We update the dimensions of the internal elements of CTkButton Widget self.canvas.config(width=event.width, height=event.height) # only redraw if dimensions changed (for performance) if self.width != event.width or self.height != event.height: self.width = event.width self.height = event.height self.draw(no_color_updates=True) # fast drawing without color changes def detect_color_of_master(self): if isinstance(self.master, CTkFrame): return self.master.fg_color else: return self.master.cget("bg") @staticmethod def calc_optimal_corner_radius(user_corner_radius): if sys.platform == "darwin": return user_corner_radius # on macOS just use given value (canvas has Antialiasing) else: user_corner_radius = 0.5 * round(user_corner_radius / 0.5) # round to 0.5 steps # make sure the value is always with .5 at the end for smoother corners if user_corner_radius == 0: return 0 elif user_corner_radius % 1 == 0: return user_corner_radius + 0.5 else: return user_corner_radius def draw(self, no_color_updates=False): self.canvas.configure(bg=CTkColorManager.single_color(self.bg_color, self.appearance_mode)) # decide the drawing method if sys.platform == "darwin": # on macOS draw button with polygons (positions are more accurate, macOS has Antialiasing) self.draw_with_polygon_shapes() else: # on Windows and other draw with ovals (corner_radius can be optimised to look better than with polygons) self.draw_with_ovals_and_rects() if no_color_updates is False: # set color for the button border parts (outline) self.canvas.itemconfig("border_parts", outline=CTkColorManager.single_color(self.border_color, self.appearance_mode), fill=CTkColorManager.single_color(self.border_color, self.appearance_mode)) # set color for inner button parts (depends on button state) if self.state == tkinter.DISABLED: self.canvas.itemconfig("inner_parts", outline=CTkColorManager.darken_hex_color(CTkColorManager.single_color(self.fg_color, self.appearance_mode)), fill=CTkColorManager.darken_hex_color(CTkColorManager.single_color(self.fg_color, self.appearance_mode))) else: self.canvas.itemconfig("inner_parts", outline=CTkColorManager.single_color(self.fg_color, self.appearance_mode), fill=CTkColorManager.single_color(self.fg_color, self.appearance_mode)) # 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.text_font) 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=CTkColorManager.single_color(self.text_color, self.appearance_mode)) # set text_label bg color (label color) if self.state == tkinter.DISABLED: self.text_label.configure(bg=CTkColorManager.darken_hex_color(CTkColorManager.single_color(self.fg_color, self.appearance_mode))) else: self.text_label.configure(bg=CTkColorManager.single_color(self.fg_color, self.appearance_mode)) self.text_label.configure(text=self.text) # set text else: # delete text_label if no text given if self.text_label is not None: self.text_label.destroy() self.text_label = None # 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.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.state == tkinter.DISABLED: self.image_label.configure(bg=CTkColorManager.darken_hex_color(CTkColorManager.single_color(self.fg_color, self.appearance_mode))) else: self.image_label.configure(bg=CTkColorManager.single_color(self.fg_color, self.appearance_mode)) self.image_label.configure(image=self.image) # set image else: # delete text_label if no text given if self.image_label is not None: self.image_label.destroy() self.image_label = None # create grid layout with just an image given if self.image_label is not None and self.text_label is None: self.image_label.grid(row=0, column=0, rowspan=2, columnspan=2, sticky="") # create grid layout with just text given if self.image_label is None and self.text_label is not None: self.text_label.grid(row=0, column=0, padx=self.corner_radius, pady=self.border_width, rowspan=2, columnspan=2, sticky="") # create grid layout of image and text label in 2x2 grid system with given compound if self.image_label is not None and self.text_label is not None: if self.compound == tkinter.LEFT or self.compound == "left": self.image_label.grid(row=0, column=0, padx=self.corner_radius, sticky="e", rowspan=2, columnspan=1) self.text_label.grid(row=0, column=1, padx=self.corner_radius, sticky="w", rowspan=2, columnspan=1, pady=self.border_width) elif self.compound == tkinter.TOP or self.compound == "top": self.image_label.grid(row=0, column=0, padx=self.corner_radius, sticky="s", columnspan=2, rowspan=1) self.text_label.grid(row=1, column=0, padx=self.corner_radius, sticky="n", columnspan=2, rowspan=1, pady=self.border_width) elif self.compound == tkinter.RIGHT or self.compound == "right": self.image_label.grid(row=0, column=1, padx=self.corner_radius, sticky="w", rowspan=2, columnspan=1) self.text_label.grid(row=0, column=0, padx=self.corner_radius, sticky="e", rowspan=2, columnspan=1, pady=self.border_width) elif self.compound == tkinter.BOTTOM or self.compound == "bottom": self.image_label.grid(row=1, column=0, padx=self.corner_radius, sticky="n", columnspan=2, rowspan=1) self.text_label.grid(row=0, column=0, padx=self.corner_radius, sticky="s", columnspan=2, rowspan=1, pady=self.border_width) def draw_with_polygon_shapes(self): """ draw the button parts with just two polygons that have a rounded border """ # create border button parts (only if border exists) if self.border_width > 0: if not self.canvas.find_withtag("border_parts"): self.canvas.create_polygon((0, 0, 0, 0), tags=("border_line_1", "border_parts")) self.canvas.coords("border_line_1", (self.corner_radius, self.corner_radius, self.width - self.corner_radius, self.corner_radius, self.width - self.corner_radius, self.height - self.corner_radius, self.corner_radius, self.height - self.corner_radius)) self.canvas.itemconfig("border_line_1", joinstyle=tkinter.ROUND, width=self.corner_radius * 2) # create inner button parts if not self.canvas.find_withtag("inner_parts"): self.canvas.create_polygon((0, 0, 0, 0), tags=("inner_line_1", "inner_parts")) if self.corner_radius <= self.border_width: bottom_right_shift = -1 # weird canvas rendering inaccuracy that has to be corrected in some cases else: bottom_right_shift = 0 self.canvas.coords("inner_line_1", (self.border_width + self.inner_corner_radius, self.border_width + self.inner_corner_radius, self.width - (self.border_width + self.inner_corner_radius) + bottom_right_shift, self.border_width + self.inner_corner_radius, self.width - (self.border_width + self.inner_corner_radius) + bottom_right_shift, self.height - (self.border_width + self.inner_corner_radius) + bottom_right_shift, self.border_width + self.inner_corner_radius, self.height - (self.border_width + self.inner_corner_radius) + bottom_right_shift)) self.canvas.itemconfig("inner_line_1", joinstyle=tkinter.ROUND, width=self.inner_corner_radius * 2) def draw_with_ovals_and_rects(self): """ draw the button parts with ovals at the corner and rectangles in the middle """ if sys.platform == "darwin": oval_bottom_right_shift = 0 rect_bottom_right_shift = 0 else: # ovals and rects are always rendered too large on Windows and need to be made smaller by -1 oval_bottom_right_shift = -1 rect_bottom_right_shift = -1 # create border button parts if self.border_width > 0: if self.corner_radius > 0: # create canvas border corner parts if not already created if not self.canvas.find_withtag("border_oval_1"): self.canvas.create_oval(0, 0, 0, 0, tags=("border_oval_1", "border_corner_part", "border_parts")) self.canvas.create_oval(0, 0, 0, 0, tags=("border_oval_2", "border_corner_part", "border_parts")) self.canvas.create_oval(0, 0, 0, 0, tags=("border_oval_3", "border_corner_part", "border_parts")) self.canvas.create_oval(0, 0, 0, 0, tags=("border_oval_4", "border_corner_part", "border_parts")) # change position of border corner parts self.canvas.coords("border_oval_1", (0, 0, self.corner_radius * 2 + oval_bottom_right_shift, self.corner_radius * 2 + oval_bottom_right_shift)) self.canvas.coords("border_oval_2", (self.width - self.corner_radius * 2, 0, self.width + oval_bottom_right_shift, self.corner_radius * 2 + oval_bottom_right_shift)) self.canvas.coords("border_oval_3", (0, self.height - self.corner_radius * 2, self.corner_radius * 2 + oval_bottom_right_shift, self.height + oval_bottom_right_shift)) self.canvas.coords("border_oval_4", (self.width - self.corner_radius * 2, self.height - self.corner_radius * 2, self.width + oval_bottom_right_shift, self.height + oval_bottom_right_shift)) else: self.canvas.delete("border_corner_part") # delete border corner parts if not needed # create canvas border rectangle parts if not already created if not self.canvas.find_withtag("border_rectangle_1"): self.canvas.create_rectangle(0, 0, 0, 0, tags=("border_rectangle_1", "border_rectangle_part", "border_parts")) self.canvas.create_rectangle(0, 0, 0, 0, tags=("border_rectangle_2", "border_rectangle_part", "border_parts")) # change position of border rectangle parts self.canvas.coords("border_rectangle_1", (0, self.corner_radius, self.width + rect_bottom_right_shift, self.height - self.corner_radius + rect_bottom_right_shift)) self.canvas.coords("border_rectangle_2", (self.corner_radius, 0, self.width - self.corner_radius + rect_bottom_right_shift, self.height + rect_bottom_right_shift)) # create inner button parts if self.inner_corner_radius > 0: # create canvas border corner parts if not already created if not self.canvas.find_withtag("inner_corner_part"): self.canvas.create_oval(0, 0, 0, 0, tags=("inner_oval_1", "inner_corner_part", "inner_parts")) self.canvas.create_oval(0, 0, 0, 0, tags=("inner_oval_2", "inner_corner_part", "inner_parts")) self.canvas.create_oval(0, 0, 0, 0, tags=("inner_oval_3", "inner_corner_part", "inner_parts")) self.canvas.create_oval(0, 0, 0, 0, tags=("inner_oval_4", "inner_corner_part", "inner_parts")) # change position of border corner parts self.canvas.coords("inner_oval_1", (self.border_width, self.border_width, self.border_width + self.inner_corner_radius * 2 + oval_bottom_right_shift, self.border_width + self.inner_corner_radius * 2 + oval_bottom_right_shift)) self.canvas.coords("inner_oval_2", (self.width - self.border_width - self.inner_corner_radius * 2, self.border_width, self.width - self.border_width + oval_bottom_right_shift, self.border_width + self.inner_corner_radius * 2 + oval_bottom_right_shift)) self.canvas.coords("inner_oval_3", (self.border_width, self.height - self.border_width - self.inner_corner_radius * 2, self.border_width + self.inner_corner_radius * 2 + oval_bottom_right_shift, self.height - self.border_width + oval_bottom_right_shift)) self.canvas.coords("inner_oval_4", (self.width - self.border_width - self.inner_corner_radius * 2, self.height - self.border_width - self.inner_corner_radius * 2, self.width - self.border_width + oval_bottom_right_shift, self.height - self.border_width + oval_bottom_right_shift)) else: self.canvas.delete("inner_corner_part") # delete inner corner parts if not needed # create canvas inner rectangle parts if not already created if not self.canvas.find_withtag("inner_rectangle_part"): self.canvas.create_rectangle(0, 0, 0, 0, tags=("inner_rectangle_1", "inner_rectangle_part", "inner_parts")) self.canvas.create_rectangle(0, 0, 0, 0, tags=("inner_rectangle_2", "inner_rectangle_part", "inner_parts")) # change position of inner rectangle parts self.canvas.coords("inner_rectangle_1", (self.border_width + self.inner_corner_radius, self.border_width, self.width - self.border_width - self.inner_corner_radius + rect_bottom_right_shift, self.height - self.border_width + rect_bottom_right_shift)) self.canvas.coords("inner_rectangle_2", (self.border_width, self.border_width + self.inner_corner_radius, self.width - self.border_width + rect_bottom_right_shift, self.height - self.inner_corner_radius - self.border_width + rect_bottom_right_shift)) def config(self, *args, **kwargs): self.configure(*args, **kwargs) def configure(self, *args, **kwargs): require_redraw = False # some attribute changes require a call of self.draw() at the end if "text" in kwargs: self.set_text(kwargs["text"]) del kwargs["text"] if "state" in kwargs: self.set_state(kwargs["state"]) del kwargs["state"] if "image" in kwargs: self.set_image(kwargs["image"]) del kwargs["image"] if "compound" in kwargs: self.compound = kwargs["compound"] require_redraw = True del kwargs["compound"] if "fg_color" in kwargs: self.fg_color = kwargs["fg_color"] require_redraw = True del kwargs["fg_color"] if "bg_color" in kwargs: if kwargs["bg_color"] is None: self.bg_color = self.detect_color_of_master() else: self.bg_color = kwargs["bg_color"] require_redraw = True del kwargs["bg_color"] if "hover_color" in kwargs: self.hover_color = kwargs["hover_color"] require_redraw = True del kwargs["hover_color"] if "text_color" in kwargs: self.text_color = kwargs["text_color"] require_redraw = True del kwargs["text_color"] super().configure(*args, **kwargs) if require_redraw: self.draw() def set_state(self, state): self.state = state if self.state == tkinter.DISABLED: self.hover = False if sys.platform == "darwin" and self.function is not None: self.configure(cursor="arrow") elif self.state == tkinter.NORMAL: self.hover = True if sys.platform == "darwin" and self.function is not None: self.configure(cursor="pointinghand") self.draw() def set_text(self, text): self.text = text self.draw() def set_image(self, image): self.image = image self.draw() def on_enter(self, event=0): if self.hover is True: # set color of inner button parts to hover color self.canvas.itemconfig("inner_parts", outline=CTkColorManager.single_color(self.hover_color, self.appearance_mode), fill=CTkColorManager.single_color(self.hover_color, self.appearance_mode)) # set text_label bg color to button hover color if self.text_label is not None: self.text_label.configure(bg=CTkColorManager.single_color(self.hover_color, self.appearance_mode)) # set image_label bg color to button hover color if self.image_label is not None: self.image_label.configure(bg=CTkColorManager.single_color(self.hover_color, self.appearance_mode)) def on_leave(self, event=0): if self.hover is True: # set color of inner button parts self.canvas.itemconfig("inner_parts", outline=CTkColorManager.single_color(self.fg_color, self.appearance_mode), fill=CTkColorManager.single_color(self.fg_color, self.appearance_mode)) # set text_label bg color (label color) if self.text_label is not None: self.text_label.configure(bg=CTkColorManager.single_color(self.fg_color, self.appearance_mode)) # set image_label bg color (image bg color) if self.image_label is not None: self.image_label.configure(bg=CTkColorManager.single_color(self.fg_color, self.appearance_mode)) def clicked(self, event=0): if self.function is not None: if self.state is not tkinter.DISABLED: self.function() self.on_leave() def set_appearance_mode(self, mode_string): if mode_string.lower() == "dark": self.appearance_mode = 1 elif mode_string.lower() == "light": self.appearance_mode = 0 self.draw()