如何在 Tkinter 中的 canvas 内的框架内获取所有 OptionMenu 小部件的值
How to get the values of all the OptionMenu widgets within a frame inside a canvas in Tkinter
我正在编写一个极简主义的图像标记应用程序,它会列出特定位置的所有图像文件,并在下拉菜单旁边列出 select 用于标记图像的选项。标记图像后,我需要将更改保存到 JSON 文件,我有一个按钮。我们如何读取所有选项 selected 以便将其写入文件?
以下是目前的代码:
from tkinter import N, RIGHT, Button, OptionMenu, Scrollbar, StringVar, Tk, Canvas, Frame, Label
class App:
def __init__(self):
self.root = Tk()
self.tags = ['Apples', 'Oranges', 'Berries']
self.GetRows()
self.SaveButton()
self.root.mainloop()
def GetRows(self):
self.canvas = Canvas(self.root)
self.scroll_y = Scrollbar(self.root, orient="vertical", command=self.canvas.yview)
self.frame = Frame(self.canvas)
lst = [f"A01{str(i)}.JPG" for i in range(100)]
for idx, r in enumerate(lst):
filename = Label(self.frame, text=r)
filename.grid(row=idx+2, column=0, sticky=N)
label = StringVar()
drop = OptionMenu(self.frame, label, *self.tags)
drop.grid(row=idx+2, column=1)
# put the frame in the canvas
self.canvas.create_window(0, 0, anchor='nw', window=self.frame)
# make sure everything is displayed before configuring the scrollregion
self.canvas.update_idletasks()
self.canvas.configure(scrollregion=self.canvas.bbox('all'),
yscrollcommand=self.scroll_y.set)
self.canvas.pack(fill='both', expand=True, side='left')
self.scroll_y.pack(fill='y', side='right')
def SaveState(self):
pass
def SaveButton(self):
self.save_button = Button(self.root, text="Save Changes", padx=50, pady=10, command=self.SaveState)
self.save_button.pack(side=RIGHT)
if __name__ == '__main__':
App()
到目前为止,SaveState 方法将用于将 select 离子写入文件。
提前致谢!
为了使 OptionMenu
结果可用,请尝试修改您的代码,以便
所有 StringVar
都可以在 GetRows
.
之外访问
def GetRows(self):
...
# Define label as a list
self.label = []
for idx, r in enumerate(lst):
filename = Label(self.frame, text=r)
filename.grid(row=idx+2, column=0, sticky=N)
label = StringVar()
drop = OptionMenu(self.frame, label, *self.tags)
drop.grid(row=idx+2, column=1)
# Save StringVar reference
self.label.append(label)
...
def SaveState(self):
self.data = dict()
# Retrieve results into dictionary
for i, a in enumerate(self.label):
self.data[f"A_{i}"] = a.get()
print(self.data)
然后用json.dump(self.data,a_file)保存
我正在编写一个极简主义的图像标记应用程序,它会列出特定位置的所有图像文件,并在下拉菜单旁边列出 select 用于标记图像的选项。标记图像后,我需要将更改保存到 JSON 文件,我有一个按钮。我们如何读取所有选项 selected 以便将其写入文件?
以下是目前的代码:
from tkinter import N, RIGHT, Button, OptionMenu, Scrollbar, StringVar, Tk, Canvas, Frame, Label
class App:
def __init__(self):
self.root = Tk()
self.tags = ['Apples', 'Oranges', 'Berries']
self.GetRows()
self.SaveButton()
self.root.mainloop()
def GetRows(self):
self.canvas = Canvas(self.root)
self.scroll_y = Scrollbar(self.root, orient="vertical", command=self.canvas.yview)
self.frame = Frame(self.canvas)
lst = [f"A01{str(i)}.JPG" for i in range(100)]
for idx, r in enumerate(lst):
filename = Label(self.frame, text=r)
filename.grid(row=idx+2, column=0, sticky=N)
label = StringVar()
drop = OptionMenu(self.frame, label, *self.tags)
drop.grid(row=idx+2, column=1)
# put the frame in the canvas
self.canvas.create_window(0, 0, anchor='nw', window=self.frame)
# make sure everything is displayed before configuring the scrollregion
self.canvas.update_idletasks()
self.canvas.configure(scrollregion=self.canvas.bbox('all'),
yscrollcommand=self.scroll_y.set)
self.canvas.pack(fill='both', expand=True, side='left')
self.scroll_y.pack(fill='y', side='right')
def SaveState(self):
pass
def SaveButton(self):
self.save_button = Button(self.root, text="Save Changes", padx=50, pady=10, command=self.SaveState)
self.save_button.pack(side=RIGHT)
if __name__ == '__main__':
App()
到目前为止,SaveState 方法将用于将 select 离子写入文件。
提前致谢!
为了使 OptionMenu
结果可用,请尝试修改您的代码,以便
所有 StringVar
都可以在 GetRows
.
def GetRows(self):
...
# Define label as a list
self.label = []
for idx, r in enumerate(lst):
filename = Label(self.frame, text=r)
filename.grid(row=idx+2, column=0, sticky=N)
label = StringVar()
drop = OptionMenu(self.frame, label, *self.tags)
drop.grid(row=idx+2, column=1)
# Save StringVar reference
self.label.append(label)
...
def SaveState(self):
self.data = dict()
# Retrieve results into dictionary
for i, a in enumerate(self.label):
self.data[f"A_{i}"] = a.get()
print(self.data)
然后用json.dump(self.data,a_file)保存