CustomTkinter/customtkinter/customtkinter_button.py
2021-11-10 13:12:09 +01:00

512 lines
25 KiB
Python

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("<Enter>", self.on_enter)
self.canvas.bind("<Leave>", self.on_leave)
self.canvas.bind("<Button-1>", self.clicked)
self.canvas.bind("<Button-1>", self.clicked)
self.canvas_fg_parts = []
self.canvas_border_parts = []
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('<Configure>', 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("<Enter>", self.on_enter)
self.text_label.bind("<Leave>", self.on_leave)
self.text_label.bind("<Button-1>", self.clicked)
self.text_label.bind("<Button-1>", 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("<Enter>", self.on_enter)
self.image_label.bind("<Leave>", self.on_leave)
self.image_label.bind("<Button-1>", self.clicked)
self.image_label.bind("<Button-1>", 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()