pythontkinterframe滚动条_PythonTK中的带scrollbar的Frame类实现

最近用Tk写了个UI&＃xff0c;发现TK里面的scrollbar并不像Java里面可以attach到各种组件&＃xff0c;只能attach到诸如frame和canvas等少量组件&＃xff0c;如果想实现一个带scrollbar的text area或者checkbox list就需要额外实现&＃xff0c;而且对于鼠标的滚轮动作默认不感知&＃xff0c;也需要额外实现。总之&＃xff0c;python的TK开发起来还是挺烦的&＃xff0c;没有事件监听&＃xff0c;很多地方都需要用TK variable 来实现&＃xff0c;扯远了&＃xff0c;附上实现了verticalscrollbar和滚轮动作的Frame类&＃xff0c;使用时需要注意把child组件的parent指定为这个新类的interior&＃xff0c;例如&＃xff1a;

调用&＃xff1a;

dst_frame &＃61; VerticalScrolledFrame(frame, height&＃61;500, borderwidth&＃61;5, relief&＃61;"groove")

text_area &＃61; ttk.Checkbutton(dst_frame.interior)

class实现&＃xff1a;

import Tkinter as tk

import ttk

class VerticalScrolledFrame(tk.Frame):

"""A pure Tkinter scrollable frame that actually works!

* Use the &＃39;interior&＃39; attribute to place widgets inside the scrollable frame

* Construct and pack/place/grid normally

* This frame only allows vertical scrolling

"""

def __init__(self, parent, *args, **kw):

tk.Frame.__init__(self, parent, *args, **kw)

# create a canvas object and a vertical scrollbar for scrolling it

vscrollbar &＃61; ttk.Scrollbar(self, orient&＃61;tk.VERTICAL)

vscrollbar.pack(fill&＃61;tk.Y, side&＃61;tk.RIGHT, expand&＃61;tk.FALSE)

canvas &＃61; tk.Canvas(self, bd&＃61;1, highlightthickness&＃61;1,

yscrollcommand&＃61;vscrollbar.set)

canvas.pack(side&＃61;tk.LEFT, fill&＃61;tk.BOTH, expand&＃61;tk.TRUE)

vscrollbar.config(command&＃61;canvas.yview)

# reset the view

canvas.xview_moveto(0)

canvas.yview_moveto(0)

# create a frame inside the canvas which will be scrolled with it

self.interior &＃61; interior &＃61; ttk.Frame(canvas)

interior_id &＃61; canvas.create_window(0, 0, window&＃61;interior,

anchor&＃61;tk.NW)

# track changes to the canvas and frame width and sync them,

# also updating the scrollbar

def _configure_interior(event):

# update the scrollbars to match the size of the inner frame

size &＃61; (interior.winfo_reqwidth(), interior.winfo_reqheight())

canvas.config(scrollregion&＃61;"0 0 %s %s" % size)

if interior.winfo_reqwidth() !&＃61; canvas.winfo_width():

# update the canvas&＃39;s width to fit the inner frame

canvas.config(width&＃61;interior.winfo_reqwidth())

interior.bind(&＃39;&＃39;, _configure_interior)

def _configure_canvas(event):

if interior.winfo_reqwidth() !&＃61; canvas.winfo_width():

# update the inner frame&＃39;s width to fill the canvas

canvas.itemconfigure(interior_id, width&＃61;canvas.winfo_width())

canvas.bind(&＃39;&＃39;, _configure_canvas)

def _bound_to_mousewheel(event):

canvas.bind_all("", _on_mousewheel)

canvas.bind(&＃39;&＃39;, _bound_to_mousewheel)

def _unbound_to_mousewheel(event):

canvas.unbind_all("")

canvas.bind(&＃39;&＃39;, _unbound_to_mousewheel)

def _on_mousewheel(event):

canvas.yview_scroll(-1 * (event.delta / 120), "units")

canvas.bind_all(&＃39;&＃39;, _on_mousewheel)