python - 滚动笔记本选项卡 Tkinter

Question

我想制作很多笔记本选项卡，我想将它们放在 Canvas 中并添加水平滚动条，以便我可以滚动它们。 我设置了 Canvas 大小，但当我添加新选项卡时 Canvas 大小不断变化。另外，滚动条不起作用，你能告诉我我做错了什么吗？

该程序没有向我显示任何错误。这是代码:

from tkinter import *
from tkinter import ttk

myApp = Tk()
myApp.title(" Program ")                         
myApp.geometry("900x500")

CanvasTabs = Canvas(myApp, width=50, height=50)
CanvasTabs.grid(row=0,column=0)

tabs = ttk.Notebook(CanvasTabs, width=100, height=100)

tab1 = ttk.Frame(tabs)
tabs.add(tab1,text="  Tab 1  ")

tab2 = ttk.Frame(tabs)
tabs.add(tab2,text="  Tab 2  ")

tab3 = ttk.Frame(tabs)
tabs.add(tab3,text="  Tab 3  ")

tab4 = ttk.Frame(tabs)
tabs.add(tab4,text="  Tab 4  ")


hbar=Scrollbar(CanvasTabs,orient=HORIZONTAL)
hbar.pack(side=TOP,fill=X)
hbar.config(command=CanvasTabs.xview)

CanvasTabs.config(xscrollcommand=hbar.set)


tabs.pack(expand=1, fill="both")   

myApp.mainloop()

Answer 1

我编写了一个小部件来解决该问题。这是一个真正的解决方案: https://github.com/muhammeteminturgut/ttkScrollableNotebook

# -*- coding: utf-8 -*-

# Copyright (c) Muhammet Emin TURGUT 2020
# For license see LICENSE
from tkinter import *
from tkinter import ttk

class ScrollableNotebook(ttk.Frame):
    def __init__(self,parent,*args,**kwargs):
        ttk.Frame.__init__(self, parent, *args)
        self.xLocation = 0
        self.notebookContent = ttk.Notebook(self,**kwargs)
        self.notebookContent.pack(fill="both", expand=True)

        self.notebookTab = ttk.Notebook(self,**kwargs)
        self.notebookTab.bind("<<NotebookTabChanged>>",self._tabChanger)

        slideFrame = ttk.Frame(self)
        slideFrame.place(relx=1.0, x=0, y=1, anchor=NE)
        leftArrow = ttk.Label(slideFrame, text="\u25c0")
        leftArrow.bind("<1>",self._leftSlide)
        leftArrow.pack(side=LEFT)
        rightArrow = ttk.Label(slideFrame, text=" \u25b6")
        rightArrow.bind("<1>",self._rightSlide)
        rightArrow.pack(side=RIGHT)
        self.notebookContent.bind( "<Configure>", self._resetSlide)

    def _tabChanger(self,event):
        self.notebookContent.select(self.notebookTab.index("current"))

    def _rightSlide(self,event):
        if self.notebookTab.winfo_width()>self.notebookContent.winfo_width()-30:
            if (self.notebookContent.winfo_width()-(self.notebookTab.winfo_width()+self.notebookTab.winfo_x()))<=35:
                self.xLocation-=20
                self.notebookTab.place(x=self.xLocation,y=0)
    def _leftSlide(self,event):
        if not self.notebookTab.winfo_x()== 0:
            self.xLocation+=20
            self.notebookTab.place(x=self.xLocation,y=0)

    def _resetSlide(self,event):
        self.notebookTab.place(x=0,y=0)
        self.xLocation = 0

    def add(self,frame,**kwargs):
        if len(self.notebookTab.winfo_children())!=0:
            self.notebookContent.add(frame, text="",state="hidden")
        else:
            self.notebookContent.add(frame, text="")
        self.notebookTab.add(ttk.Frame(self.notebookTab),**kwargs)

    def forget(self,tab_id):
        self.notebookContent.forget(tab_id)
        self.notebookTab.forget(tab_id)

    def hide(self,tab_id):
        self.notebookContent.hide(tab_id)
        self.notebookTab.hide(tab_id)

    def identify(self,x, y):
        return self.notebookTab.identify(x,y)

    def index(self,tab_id):
        return self.notebookTab.index(tab_id)

    def insert(self,pos,frame, **kwargs):
        self.notebookContent.insert(pos,frame, **kwargs)
        self.notebookTab.insert(pos,frame,**kwargs)

    def select(self,tab_id):
        self.notebookContent.select(tab_id)
        self.notebookTab.select(tab_id)

    def tab(self,tab_id, option=None, **kwargs):
        return self.notebookTab.tab(tab_id, option=None, **kwargs)

    def tabs(self):
        return self.notebookContent.tabs()

    def enable_traversal(self):
        self.notebookContent.enable_traversal()
        self.notebookTab.enable_traversal()