python 调整复选框tkinter的滚动条大小

lf5gs5x2  于 2023-01-19  发布在  Python
关注(0)|答案(2)|浏览(228)

经过几次测试和得到的帮助,我设法得到了一个有几个复选框的滚动条的代码。我目前的问题是滚动条比它需要的空间大得多,通常我不能根据自己的喜好改变它的大小。这是我的代码:

import tkinter as tk
class CheckboxList(tk.Frame):
    def __init__(self, master=None, **kw):
        super().__init__(master, **kw)
        self.checkbuttons = []
        self.vars = []
        self.canvas = tk.Canvas(self, bg='white', bd=0, highlightthickness=0)
        self.yscroll = tk.Scrollbar(self, orient="vertical", command=self.canvas.yview)
        self.frame = tk.Frame(self.canvas)
        self.canvas.create_window((0, 0), window=self.frame, anchor='nw')
        self.canvas.configure(yscrollcommand=self.yscroll.set)
        self.canvas.grid(row=0,column=0, sticky='nsew')
        self.yscroll.grid(row=0, column=1, sticky='nse')
        for i in range(20):
            var = tk.IntVar(value=0)
            cb = tk.Checkbutton(self.frame, text=f"checkbutton #{i}", variable=var, onvalue=1, offvalue=0)
            cb.grid(row=i, column=0, sticky='w')
            self.checkbuttons.append(cb)
            self.vars.append(var)
        self.frame.update_idletasks()
        self.canvas.config(scrollregion=self.canvas.bbox("all"))
        
        self.canvas.bind_all("<MouseWheel>", self._on_mousewheel)
        
    def _on_mousewheel(self, event):
        self.canvas.yview_scroll(int(-1*(event.delta/120)), "units")

root = tk.Tk()
cl = CheckboxList(root, width=20, height=10)
cl.grid(row=0,column=0,sticky='nsew')
root.mainloop()

我已经做了几个测试,改变“网格”的值,但我不能。我希望我可以有更多的控制大小。正如你可以看到,从图像中,有很多白色,我希望能够改变整体高度以及

编辑:实际代码:

class CheckboxList(tk.Frame):
def __init__(self, master=None, **kw):
    super().__init__(master, **kw)
    self.checkbuttons = []
    self.vars = []
    self.canvas = tk.Canvas(self, bg='white', bd=0, highlightthickness=0)
    #self.canvas = tk.Canvas(self, bg='white', bd=0,width=115, highlightthickness=0)
    self.yscroll = tk.Scrollbar(self, orient="vertical", command=self.canvas.yview)
    self.frame = tk.Frame(self.canvas)
    self.canvas.create_window((0, 0), window=self.frame, anchor='nw')
    self.canvas.configure(yscrollcommand=self.yscroll.set)
    self.canvas.grid(row=0,column=0, sticky='nsew')
    self.yscroll.grid(row=0, column=1, sticky='nse')

    for i in range(20):
        var = tk.IntVar(value=0)
        cb = tk.Checkbutton(self.frame, text=f"checkbutton #{i}", variable=var, onvalue=1, offvalue=0)
        cb.grid(row=i, column=0, sticky='w')
        self.checkbuttons.append(cb)
        self.vars.append(var)
    self.frame.update_idletasks()
    #self.canvas.config(scrollregion=self.canvas.bbox("all"))
    self.frame.bind("<Configure>", lambda e: self.canvas.config(width=e.width, scrollregion=self.canvas.bbox("all")))

    self.canvas.bind_all("<MouseWheel>", self._on_mousewheel)
    
def _on_mousewheel(self, event):
    self.canvas.yview_scroll(int(-1*(event.delta/120)), "units")
kcugc4gi

kcugc4gi1#

在第8行添加width
更改此内容:

self.canvas = tk.Canvas(self, bg='white', bd=0, highlightthickness=0)

致:

self.canvas = tk.Canvas(self, bg='white', bd=0,width=115, highlightthickness=0)

截图:

ws51t4hk

ws51t4hk2#

通过回调self.frame上的<Configure>事件,您可以将self.canvas的宽度设置为与self.frame相同。另请注意,当self.frame的大小发生变化时,您需要更新画布的scrollregion

...
        self.frame = tk.Frame(self.canvas)
        self.frame.bind("<Configure>", lambda e: self.canvas.config(width=e.width, scrollregion=self.canvas.bbox("all")))
        ...
        # scrollregion will be updated via the above event binding on self.frame, so below line is not necessary
        #self.canvas.config(scrollregion=self.canvas.bbox("all"))
        ...

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