所以我似乎不知道如何解决我所面临的这个困境。 我有一个简单的脚本,基本上打印出 5 个标签,每个标签依次打印出 1 个标签,并暂停 2 秒。
我想做的基本上是以“红色”突出显示当前正在运行的标签,然后当第二个标签打印出来时,第一个标签的前景应返回到“黑色”,依此类推。所以基本上最后一个标签应该是红色的,前面的标签应该是黑色的。
基本上,这样做的目的是我有一个用 python 编写的自动化脚本来测试 Android TV,并且我想为其制作一个简单的 GUI。我想强调当前正在运行的测试用例。函数(测试用例)执行后,我希望它变成黑色。
代码如下:
from tkinter import *
from tkinter import ttk
import tkinter.font as tkFont
import time
class SampleTkinterLoop:
def __init__(self, master):
# Initialize master as the Tk() instance
self.master = master
master.title("Loop Tests")
master.geometry("768x480")
# Create main frame as app
self.app = ttk.Frame(root)
self.app.pack(fill="both", expand=True)
# Create a custom font
self.mainFont = tkFont.Font(family="Helvetica", size=12)
# Initialize flags for BG and FG change
self.bgCounter = 0
def test1(self):
x = True # set fgChooser to True to make foreground red
ttk.Label(
self.app, text=f'Test case 1',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont).pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
def test2(self):
x = True # set fgChooser to True to make foreground red
ttk.Label(
self.app, text=f'Test case 2',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont).pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
def test3(self):
x = True # set fgChooser to True to make foreground red
ttk.Label(
self.app, text=f'Test case 3',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont).pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
def test4(self):
x = True # set fgChooser to True to make foreground red
ttk.Label(
self.app, text=f'Test case 4',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont).pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
def test5(self):
x = True # set fgChooser to True to make foreground red
ttk.Label(
self.app, text=f'Test case 5',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont).pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
def repeatIt(self):
for i in range(0, 5):
# self.anotherLoop()
self.test1()
self.test2()
self.test3()
self.test4()
self.test5()
self.reset()
root.update()
time.sleep(1)
print(i)
def bgChooser(self):
# make label background alternate to white and gray for easy reading
if (self.bgCounter % 2) == 0:
return str("#fff")
return str("#ccc")
def fgChooser(self, isActive=False):
# this is where the problem is, can't seem to find a way to make a flag for foreground color of label
if isActive:
return str("#a5120d")
return str("#000")
def reset(self):
'''reset the UI'''
for child in self.app.winfo_children():
child.destroy()
root = Tk()
LoopTest = SampleTkinterLoop(root)
LoopTest.repeatIt()
root.mainloop()
上面的代码使所有标签变为红色,但不会将前一个标签变为黑色。
最佳答案
您不需要使用ttk
来完成该任务。这是因为您可以稍后更改标签颜色。
例如:
进口:
from tkinter import * #<-- so you don't have to edit your full code
import tkinter as ttk #<---
import tkinter.font as tkFont
import time
您可以编辑您的 test1
函数,例如:
x = True
xyz = ttk.Label( #assign to a variable rather than packing <---
self.app, text=f'Test case 1',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont)
xyz.pack() #pack later <---
self.bgCounter += 1
x = False
root.update()
time.sleep(2)
xyz.config(fg="black") #change color after 2 sec <---
这里是一个示例代码:
from tkinter import *
import tkinter as ttk
import tkinter.font as tkFont
import time
class SampleTkinterLoop:
def __init__(self, master):
# Initialize master as the Tk() instance
self.master = master
master.title("Loop Tests")
master.geometry("768x480")
# Create main frame as app
self.app = ttk.Frame(root)
self.app.pack(fill="both", expand=True)
# Create a custom font
self.mainFont = tkFont.Font(family="Helvetica", size=12)
# Initialize flags for BG and FG change
self.bgCounter = 0
def test1(self):
x = True # set fgChooser to True to make foreground red
xyz = ttk.Label(
self.app, text=f'Test case 1',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont)
xyz.pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
xyz.config(fg="black")
def test2(self):
x = True # set fgChooser to True to make foreground red
xyz = ttk.Label(
self.app, text=f'Test case 2',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont)
xyz.pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
xyz.config(fg="black")
def test3(self):
x = True # set fgChooser to True to make foreground red
xyz = ttk.Label(
self.app, text=f'Test case 3',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont)
xyz.pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
xyz.config(fg="black")
def test4(self):
x = True # set fgChooser to True to make foreground red
xyz = ttk.Label(
self.app, text=f'Test case 4',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont)
xyz.pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
xyz.config(fg="black")
def test5(self):
x = True # set fgChooser to True to make foreground red
xyz = ttk.Label(
self.app, text=f'Test case 5',
background=self.bgChooser(),
foreground=self.fgChooser(x),
font=self.mainFont)
xyz.pack()
self.bgCounter += 1
x = False # set it back to false to make foreround black
root.update() # allow window to catch up
time.sleep(2)
xyz.config(fg="black")
def repeatIt(self):
for i in range(0, 5):
# self.anotherLoop()
self.test1()
self.test2()
self.test3()
self.test4()
self.test5()
self.reset()
root.update()
time.sleep(1)
print(i)
def bgChooser(self):
# make label background alternate to white and gray for easy reading
if (self.bgCounter % 2) == 0:
return str("#fff")
return str("#ccc")
def fgChooser(self, isActive=False):
# this is where the problem is, can't seem to find a way to make a flag for foreground color of label
if isActive:
return str("#a5120d")
return str("#000")
def reset(self):
'''reset the UI'''
for child in self.app.winfo_children():
child.destroy()
root = Tk()
LoopTest = SampleTkinterLoop(root)
LoopTest.repeatIt()
root.mainloop()
关于python - [Python][Tkinter]添加一个标志使标签的前景在循环中变成红色?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52488650/