[英]How can I add a "show details" button to a tkinter messagebox?
I have a Python script which uses tkinter.messagebox
to display an error message with traceback details if an unexpected exception occurs.我有一个 Python 脚本,它使用
tkinter.messagebox
在发生意外异常时显示带有回溯详细信息的错误消息。
import tkinter.messagebox as tm
import traceback
try:
1/0
except Exception as error:
tm.showerror(title="Error",
message="An error has occurred: '" + str(error) + "'.",
detail=traceback.format_exc())
Displaying tracebacks this way has a few drawbacks.以这种方式显示回溯有一些缺点。
Instead of displaying error details by default, I would like to add a "show details" button which would display more information in a read-only text field.我不想默认显示错误详细信息,而是想添加一个“显示详细信息”按钮,该按钮将在只读文本字段中显示更多信息。
How can I add a "show details" button to a tkinter messagebox?如何向 tkinter 消息框添加“显示详细信息”按钮?
I would use a Toplevel()
window to build my own customer error box.我会使用
Toplevel()
窗口来构建我自己的客户错误框。
I think using ttk
buttons here would be a good idea and with a combination of frames and weights we can get the window to look decent enough.我认为在这里使用
ttk
按钮是个好主意,结合框架和重量,我们可以让窗口看起来足够体面。
Keeping the window from being resized by the user I also had to set up a way to toggle the details textbox.为了防止用户调整窗口大小,我还必须设置一种方法来切换详细信息文本框。 With a tracking variable and the use of a if/else statement that was easy enough to set up.
使用跟踪变量和使用 if/else 语句很容易设置。
Finally, we can disable the textbox with .config(state="disabled")
最后,我们可以使用
.config(state="disabled")
禁用文本框
import tkinter as tk
import tkinter.ttk as ttk
import traceback
class MyApp(tk.Tk):
def __init__(self):
super().__init__()
tk.Button(self, text='test error', command=self.run_bad_math).pack()
@staticmethod
def run_bad_math():
try:
1/0
except Exception as error:
title = 'Traceback Error'
message = "An error has occurred: '{}'.".format(error)
detail = traceback.format_exc()
TopErrorWindow(title, message, detail)
class TopErrorWindow(tk.Toplevel):
def __init__(self, title, message, detail):
tk.Toplevel.__init__(self)
self.details_expanded = False
self.title(title)
self.geometry('350x75')
self.minsize(350, 75)
self.maxsize(425, 250)
self.rowconfigure(0, weight=0)
self.rowconfigure(1, weight=1)
self.columnconfigure(0, weight=1)
button_frame = tk.Frame(self)
button_frame.grid(row=0, column=0, sticky='nsew')
button_frame.columnconfigure(0, weight=1)
button_frame.columnconfigure(1, weight=1)
text_frame = tk.Frame(self)
text_frame.grid(row=1, column=0, padx=(7, 7), pady=(7, 7), sticky='nsew')
text_frame.rowconfigure(0, weight=1)
text_frame.columnconfigure(0, weight=1)
ttk.Label(button_frame, text=message).grid(row=0, column=0, columnspan=2, pady=(7, 7))
ttk.Button(button_frame, text='OK', command=self.destroy).grid(row=1, column=0, sticky='e')
ttk.Button(button_frame, text='Details', command=self.toggle_details).grid(row=1, column=1, sticky='w')
self.textbox = tk.Text(text_frame, height=6)
self.textbox.insert('1.0', detail)
self.textbox.config(state='disabled')
self.scrollb = tk.Scrollbar(text_frame, command=self.textbox.yview)
self.textbox.config(yscrollcommand=self.scrollb.set)
def toggle_details(self):
if self.details_expanded:
self.textbox.grid_forget()
self.scrollb.grid_forget()
self.geometry('350x75')
self.details_expanded = False
else:
self.textbox.grid(row=0, column=0, sticky='nsew')
self.scrollb.grid(row=0, column=1, sticky='nsew')
self.geometry('350x160')
self.details_expanded = True
if __name__ == '__main__':
App = MyApp().mainloop()
Results:结果:
Now with resizing:D现在调整大小:D
Update:更新:
In response to your statement below:回应您的以下声明:
The error window will not display if a Tk instance hasn't been initialized first.
如果没有先初始化 Tk 实例,则不会显示错误窗口。
If we set up the class as its own Tk()
instance it can be used as a stand alone error pop-up.如果我们将类设置为它自己的
Tk()
实例,它可以用作独立的错误弹出窗口。 I have also added some alignment changes and some resizing control to make this class a bit more conformative to the standard error messages you mention in the comments.我还添加了一些对齐更改和一些调整大小的控件,以使此类更符合您在评论中提到的标准错误消息。
See below code.请参阅下面的代码。
import tkinter as tk
import tkinter.ttk as ttk
class TopErrorWindow(tk.Tk):
def __init__(self, title, message, detail):
super().__init__()
self.details_expanded = False
self.title(title)
self.geometry('350x75')
self.minsize(350, 75)
self.maxsize(425, 250)
self.resizable(False, False)
self.rowconfigure(0, weight=0)
self.rowconfigure(1, weight=1)
self.columnconfigure(0, weight=1)
button_frame = tk.Frame(self)
button_frame.grid(row=0, column=0, sticky='nsew')
button_frame.columnconfigure(0, weight=1)
button_frame.columnconfigure(1, weight=1)
text_frame = tk.Frame(self)
text_frame.grid(row=1, column=0, padx=(7, 7), pady=(7, 7), sticky='nsew')
text_frame.rowconfigure(0, weight=1)
text_frame.columnconfigure(0, weight=1)
ttk.Label(button_frame, text=message).grid(row=0, column=0, columnspan=3, pady=(7, 7), padx=(7, 7), sticky='w')
ttk.Button(button_frame, text='OK', command=self.destroy).grid(row=1, column=1, sticky='e')
ttk.Button(button_frame, text='Details',
command=self.toggle_details).grid(row=1, column=2, padx=(7, 7), sticky='e')
self.textbox = tk.Text(text_frame, height=6)
self.textbox.insert('1.0', detail)
self.textbox.config(state='disabled')
self.scrollb = tk.Scrollbar(text_frame, command=self.textbox.yview)
self.textbox.config(yscrollcommand=self.scrollb.set)
self.mainloop()
def toggle_details(self):
if self.details_expanded:
self.textbox.grid_forget()
self.scrollb.grid_forget()
self.resizable(False, False)
self.geometry('350x75')
self.details_expanded = False
else:
self.textbox.grid(row=0, column=0, sticky='nsew')
self.scrollb.grid(row=0, column=1, sticky='nsew')
self.resizable(True, True)
self.geometry('350x160')
self.details_expanded = True
Results:结果:
You can add an image as well using canvas with the type of error image you want.您也可以使用带有所需错误图像类型的画布添加图像。
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