Tkinter中的类和样式
Tkinter中的类和样式
提问于 2021-04-29 18:47:12
我还在Python的第一周，所以如果这是一个明显的错误，我很抱歉……
我想在Tkinter中设计一个圆角的框架，因此我得到了一个base64编码的图像，我在这个答案(Tkinter: How to make a rounded corner text widget?)之后使用ttk.Style应用了它，效果很好。
我现在的问题是把它改造成一个类结构的程序，那里的框架根本就没有显示出来。
我在下面的代码中重复了这个问题。
第一个窗口显示了问题，第二个窗口显示了问题的外观。
我该怎么做呢？当我不将框架打包到主窗口中，而是打包到另一个框架中时，是否会出现任何新的冲突？
提前感谢！
import tkinter as tk
from tkinter import ttk
borderImageData = '''
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QAC0AABBAAB+AIjMAuEEABINAAAAAHMgAQAAAAAAAAAAAKjSxOIEJBIIpQAA
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'''
class Application(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
style = ttk.Style()
style.theme_use('clam')
borderImage = tk.PhotoImage("borderImage", data=borderImageData)
style.element_create("RoundedFrame", "image", borderImage, border=16, sticky="nsew")
style.layout("RoundedFrame", [("RoundedFrame", {"sticky": "nsew"})])
frame = ttk.Frame(self, style = "RoundedFrame", padding = 10)
frame.pack()
entry = tk.Entry(frame, borderwidth = 0, width = 40)
entry.pack(fill="both", expand=True)
app = Application()
app.mainloop()
root = tk.Tk()
style = ttk.Style()
style.theme_use('clam')
borderImage = tk.PhotoImage("borderImage", data=borderImageData)
style.element_create("RoundedFrame", "image", borderImage, border=16, sticky="nsew")
style.layout("RoundedFrame", [("RoundedFrame", {"sticky": "nsew"})])
frame = ttk.Frame(root, style = "RoundedFrame", padding = 10)
frame.pack()
entry = tk.Entry(frame, borderwidth = 0, width = 40)
entry.pack(fill="both", expand=True)
root.mainloop() 回答 1
Stack Overflow用户
回答已采纳
发布于 2021-04-29 18:53:06
问题是pythons垃圾收集正在破坏PhotoImage实例。您需要保留对它的引用(这也在文档中的某个地方)。无论如何，您可能只想将大多数内容保存为属性：
class Application(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
self.style = ttk.Style()
self.style.theme_use('clam')
self.borderImage = tk.PhotoImage("borderImage", data=borderImageData)
self.style.element_create("RoundedFrame", "image", self.borderImage, border=16, sticky="nsew")
self.style.layout("RoundedFrame", [("RoundedFrame", {"sticky": "nsew"})])
self.frame = ttk.Frame(self, style="RoundedFrame", padding=10)
self.frame.pack()
self.entry = tk.Entry(self.frame, borderwidth=0, width=40)
self.entry.pack(fill="both", expand=True)这对我很有效。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/67315837
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