为什么我的Tkinter滚动条位于应该滚动的区域的顶部？

debugcn 发表于 Dev

Leicontis

简而言之，我的问题是，在我正在编写的GUI中，滚动条重叠在框架的右边缘上方，而不是按预期的方式与框架相邻。我在这里做错了什么？一段代码重现了这个问题：


root=Tk()
root.title('Window Test')
root.grid_rowconfigure(0,weight=1)

overall=Frame(root)
overall.grid(row=0,column=0,sticky=N+E+S+W)
overall.grid_rowconfigure(0,weight=1)

outercanvas=Canvas(overall)
outercanvas.grid(row=0,column=0)
outerSframe=LabelFrame(outercanvas,text='Outer')
outerSB=Scrollbar(overall,command=outercanvas.yview)
outercanvas.config(yscrollcommand=outerSB.set)
outerSframe.bind('<Configure>',lambda e: outercanvas.configure(scrollregion=outercanvas.bbox('all')))
outercanvas.create_window((0,0),window=outerSframe,anchor=NW)
outerSB.grid(row=0,column=1,sticky=N+E+S)

innercanvas=Canvas(outerSframe)
innercanvas.grid(row=0,column=0)
innerSframe=LabelFrame(innercanvas,text='Inner')
innercanvas.create_window((0,0),window=innerSframe,anchor=NW)
Label(innerSframe,text='123456789012345678901234567890').pack()

acw1668

这是因为您的代码未指定的宽度outercanvas。您应该根据outerSframe绑定到<Configure>事件的内部回调的宽度设置其宽度：

def on_frame_resize(event):
    bbox = outercanvas.bbox('all')
    outercanvas.config(scrollregion=bbox, width=bbox[2]) # update width as well

root=Tk()
root.title('Window Test')
root.grid_rowconfigure(0,weight=1)

overall=Frame(root)
overall.grid(row=0,column=0,sticky=N+E+S+W)
overall.grid_rowconfigure(0,weight=1)

outercanvas=Canvas(overall)
outercanvas.grid(row=0,column=0)
outerSframe=LabelFrame(outercanvas,text='Outer')
outerSB=Scrollbar(overall,command=outercanvas.yview)
outercanvas.config(yscrollcommand=outerSB.set)
outerSframe.bind('<Configure>', on_frame_resize) # changed to a function instead of lambda
outercanvas.create_window((0,0),window=outerSframe,anchor=NW)
outerSB.grid(row=0,column=1,sticky=N+E+S)

innercanvas=Canvas(outerSframe)
innercanvas.grid(row=0,column=0)
innerSframe=LabelFrame(innercanvas,text='Inner')
innercanvas.create_window((0,0),window=innerSframe,anchor=NW)
Label(innerSframe,text='123456789012345678901234567890').pack()

root.mainloop()

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。