from tkinter
import Canvas
from tkinter
import Tk
from typing
import Any
class Gradient_frame(
Canvas):
__tag = "GradientFrame"
__hex_format = "#%04x%04x%04x"
top2bottom = 1
left2right = 2
def __init__(
self, parent, colors=("red", "black"),
direction=left2right,
**kw):
kw["height"] = kw.
get("height", 200)
kw["width"] = kw.
get("width", 200)
super().__init__(parent, **kw)
self.__geometry = [kw["width"], kw["height"]]
self.__colors = colors
self.__direction = direction
self.__draw_gradient()
def __draw_gradient(
self):
self.delete(self.__tag)
limit = self.__geometry[0]
if self.__direction == self.left2right
else self.__geometry[1]
red1, green1, blue1 = self.winfo_rgb(self.__colors[0])
red2, green2, blue2 = self.winfo_rgb(self.__colors[1])
r_ratio = (red2 - red1) /
limit
g_ratio = (green2 - green1) /
limit
b_ratio = (blue2 - blue1) /
limit
for pixel
in range(limit):
red =
int(red1 + (r_ratio * pixel))
green =
int(green1 + (g_ratio * pixel))
blue =
int(blue1 + (b_ratio * pixel))
color:
str = self.__hex_format % (red, green, blue)
x1 = pixel if self.__direction == self.left2right else 0
y1 = 0 if self.__direction == self.left2right else pixel
x2: int | Any = pixel if self.__direction == self.left2right else self.__geometry[0]
y2 = self.__geometry[1] if self.__direction == self.left2right else pixel
self.create_line(x1, y1, x2, y2, tag=self.__tag, fill=color)
self.tag_lower(self.__tag)
def config(
self, cnf=None, **kw):
if "colors"
in kw
and len(kw["colors"]) > 1:
self.__colors = kw.
pop("colors")
if "direction"
in kw
and kw["direction"]
in (
self.left2right,
self.top2bottom):
self.__direction = kw.
pop("direction")
if "height"
in kw:
self.__geometry[1] = kw["height"]
if "width"
in kw:
self.__geometry[0] = kw["width"]
super().config(cnf, **kw)
self.__draw_gradient()
def
configure(
self, cnf=None, **kw):
self.config(cnf, **kw)
// Применение
root = Tk()
gf = Gradient_frame(root,
colors=("orange", "gray"),
width=800,
height=600)
gf.
config(direction=gf.top2bottom)
gf.
pack()
root.mainloop()
