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