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A vertical scrolled frame for python tkinter that behaves like a normal Frame. Tested with python 2 and 3, windows and linux.
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#!/usr/bin/env python3 | |
# -*- coding: utf-8 -*- | |
try: | |
import tkinter as tk | |
except ImportError: | |
import Tkinter as tk | |
class VerticalScrolledFrame: | |
""" | |
A vertically scrolled Frame that can be treated like any other Frame | |
ie it needs a master and layout and it can be a master. | |
:width:, :height:, :bg: are passed to the underlying Canvas | |
:bg: and all other keyword arguments are passed to the inner Frame | |
note that a widget layed out in this frame will have a self.master 3 layers deep, | |
(outer Frame, Canvas, inner Frame) so | |
if you subclass this there is no built in way for the children to access it. | |
You need to provide the controller separately. | |
""" | |
def __init__(self, master, **kwargs): | |
width = kwargs.pop('width', None) | |
height = kwargs.pop('height', None) | |
bg = kwargs.pop('bg', kwargs.pop('background', None)) | |
self.outer = tk.Frame(master, **kwargs) | |
self.vsb = tk.Scrollbar(self.outer, orient=tk.VERTICAL) | |
self.vsb.pack(fill=tk.Y, side=tk.RIGHT) | |
self.canvas = tk.Canvas(self.outer, highlightthickness=0, width=width, height=height, bg=bg) | |
self.canvas.pack(side=tk.LEFT, fill=tk.BOTH, expand=True) | |
self.canvas['yscrollcommand'] = self.vsb.set | |
# mouse scroll does not seem to work with just "bind"; You have | |
# to use "bind_all". Therefore to use multiple windows you have | |
# to bind_all in the current widget | |
self.canvas.bind("<Enter>", self._bind_mouse) | |
self.canvas.bind("<Leave>", self._unbind_mouse) | |
self.vsb['command'] = self.canvas.yview | |
self.inner = tk.Frame(self.canvas, bg=bg) | |
# pack the inner Frame into the Canvas with the topleft corner 4 pixels offset | |
self.canvas.create_window(4, 4, window=self.inner, anchor='nw') | |
self.inner.bind("<Configure>", self._on_frame_configure) | |
self.outer_attr = set(dir(tk.Widget)) | |
def __getattr__(self, item): | |
if item in self.outer_attr: | |
# geometry attributes etc (eg pack, destroy, tkraise) are passed on to self.outer | |
return getattr(self.outer, item) | |
else: | |
# all other attributes (_w, children, etc) are passed to self.inner | |
return getattr(self.inner, item) | |
def _on_frame_configure(self, event=None): | |
x1, y1, x2, y2 = self.canvas.bbox("all") | |
height = self.canvas.winfo_height() | |
self.canvas.config(scrollregion = (0,0, x2, max(y2, height))) | |
def _bind_mouse(self, event=None): | |
self.canvas.bind_all("<4>", self._on_mousewheel) | |
self.canvas.bind_all("<5>", self._on_mousewheel) | |
self.canvas.bind_all("<MouseWheel>", self._on_mousewheel) | |
def _unbind_mouse(self, event=None): | |
self.canvas.unbind_all("<4>") | |
self.canvas.unbind_all("<5>") | |
self.canvas.unbind_all("<MouseWheel>") | |
def _on_mousewheel(self, event): | |
"""Linux uses event.num; Windows / Mac uses event.delta""" | |
if event.num == 4 or event.delta > 0: | |
self.canvas.yview_scroll(-1, "units" ) | |
elif event.num == 5 or event.delta < 0: | |
self.canvas.yview_scroll(1, "units" ) | |
# **** SCROLL BAR TEST ***** | |
if __name__ == "__main__": | |
root = tk.Tk() | |
root.title("Scrollbar Test") | |
root.geometry('400x500') | |
frame = VerticalScrolledFrame(root, | |
width=300, | |
borderwidth=2, | |
relief=tk.SUNKEN, | |
background="light gray") | |
#frame.grid(column=0, row=0, sticky='nsew') # fixed size | |
frame.pack(fill=tk.BOTH, expand=True) # fill window | |
for i in range(30): | |
label = tk.Label(frame, text="This is a label "+str(i)) | |
label.grid(column=1, row=i, sticky=tk.W) | |
text = tk.Entry(frame, textvariable="text") | |
text.grid(column=2, row=i, sticky=tk.W) | |
root.mainloop() |
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