如何使用 askcolor 小部件将变量设置为颜色？

Question

我正在尝试制作一个绘画类型的程序，您可以在其中绘制多个不同的形状，并且我正在尝试使用颜色选择器更改正在绘制的形状的颜色。我不明白该怎么做。

我一周前才开始编码，不知道如何解决问题，但我尝试添加不同的变量设置为所选颜色。

def getColor():
    color = askcolor() 

def line():
    a = (asl.get())
    b = (bsl.get())
    c = (csl.get())
    d = (dsl.get())
    fill = color
    cnv.create_line(a, b, c, d)

def rect():
    a = (asl.get())
    b = (bsl.get())
    c = (csl.get())
    d = (dsl.get())
    fill = color
    cnv.create_rectangle(a, b, c, d)

def circ():#center coordinates, radius
    a = (asl.get())
    b = (bsl.get())
    c = (csl.get())
    d = (dsl.get())
    fill = color
    cnv.create_oval(a, b, c, d)

from tkinter import *

from tkinter.colorchooser import *

cp=Tk()

cnv=Canvas(cp, width = 600, height = 600, bg = 'white')
cnv.grid(row = 2, column = 5, padx = 3, pady = 3)

#this is the control panel for the shape maker
exitbtn=Button(cp, text = 'Exit', command = exit)
exitbtn.grid(row = 0, column = 1, padx = 3, pady = 3)

linebtn=Button(cp, text = 'line', command = line)
linebtn.grid(row = 0, column = 2, padx = 3, pady = 3)

rectbtn=Button(cp, text = 'Rectangle', command = rect)
rectbtn.grid(row = 0, column = 3, padx = 3, pady = 3)

circbtn=Button(cp, text = 'Circle', command = circ)
circbtn.grid(row = 0, column = 4, padx = 3, pady = 3)

colrbtn=Button(cp, text = 'Color', command = getColor)
colrbtn.grid(row = 0, column = 5, padx = 3, pady = 3)


#changes the x amd y values for the corners of the shape
asl = Scale(cp, from_=0, to=600, length = 200, tickinterval=50)
asl.set(0)
asl.grid(row=6, column=1, padx=3,pady=3)

bsl = Scale(cp, from_=0, to=600, length = 200)
bsl.set(0)
bsl.grid(row=6, column=2, padx=3,pady=3)

csl = Scale(cp, from_=0, to=600, length = 200)
csl.set(0)
csl.grid(row=6, column=3, padx=3,pady=3)

dsl = Scale(cp, from_=0, to=600, length = 200)
dsl.set(0)
dsl.grid(row=6, column=4, padx=3,pady=3)


#labels that tell what the sliders do
x1 = Label(cp, text="x1")
x1.grid(row=5, column=1, padx=3,pady=3)

y1 = Label(cp, text="y1")
y1.grid(row=5, column=2, padx=3,pady=3)

x2 = Label(cp, text="x2")
x2.grid(row=5, column=3, padx=3,pady=3)

y2 = Label(cp, text="y2")
y2.grid(row=5, column=4, padx=3,pady=3)

mainloop()

我希望它使用十六进制值作为变量并用我选择的颜色填充形状。

Answer 1

您需要在设置它的任何函数中将 color 定义为全局变量。 global 表示该变量在文件中的任何位置都可用。

第一步是修改 getColor 以包含 global 语句。此外，重要的是要知道 askcolor returns 是一个元组，第二个值是您在创建 canvas 项目时可以使用的颜色规范。那就是应该保存的值

def getColor():
    global color
    color = askcolor()[1]

下一步是修改您的函数以在创建对象时使用它。例如，您的 rect 函数可能如下所示：

def rect():
    a = (asl.get())
    b = (bsl.get())
    c = (csl.get())
    d = (dsl.get())
    cnv.create_rectangle(a, b, c, d, fill=color)

如何使用 askcolor 小部件将变量设置为颜色？

How do I set a variable as a color with the askcolor widget?

tkinter

tkinter-canvas