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- import tkinter as tk
- from tkinter import filedialog, messagebox
-
- class AutoScrollbar(tk.Scrollbar):
- # A scrollbar that hides itself if it's not needed.
- # Only works if you use the grid geometry manager!
- def set(self, lo, hi):
- if float(lo) <= 0.0 and float(hi) >= 1.0:
- # grid_remove is currently missing from Tkinter!
- self.tk.call("grid", "remove", self)
- else:
- self.grid()
- tk.Scrollbar.set(self, lo, hi)
- def pack(self, **kw):
- raise TclError("cannot use pack with this widget")
- def place(self, **kw):
- raise TclError("cannot use place with this widget")
-
- class ScrollFrame:
- def __init__(self, master):
-
- self.vscrollbar = AutoScrollbar(master)
- self.vscrollbar.grid(row=0, column=1, sticky='ns')
- self.hscrollbar = AutoScrollbar(master, orient='horizontal')
- self.hscrollbar.grid(row=1, column=0, sticky='ew')
-
- self.canvas = tk.Canvas(master, yscrollcommand=self.vscrollbar.set,
- xscrollcommand=self.hscrollbar.set)
- self.canvas.grid(row=0, column=0, sticky='nsew')
-
- self.vscrollbar.config(command=self.canvas.yview)
- self.hscrollbar.config(command=self.canvas.xview)
-
- # make the canvas expandable
- master.grid_rowconfigure(0, weight=1)
- master.grid_columnconfigure(0, weight=1)
-
- # create frame inside canvas
- self.frame = tk.Frame(self.canvas)
- self.frame.rowconfigure(1, weight=1)
- self.frame.columnconfigure(1, weight=1)
-
- # update the frame
- self.frame.bind("<Configure>", self.reset_scrollregion)
-
- def reset_scrollregion(self, event):
- self.canvas.configure(scrollregion=self.canvas.bbox('all'))
-
- def update(self):
- self.canvas.create_window(0, 0, anchor='nw', window=self.frame)
- self.frame.update_idletasks()
- self.canvas.config(scrollregion=self.canvas.bbox("all"))
-
- if self.frame.winfo_reqwidth() != self.canvas.winfo_width():
- # update the canvas's width to fit the inner frame
- self.canvas.config(width = self.frame.winfo_reqwidth())
- if self.frame.winfo_reqheight() != self.canvas.winfo_height():
- # update the canvas's width to fit the inner frame
- self.canvas.config(height = self.frame.winfo_reqheight())
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