我正在尝试制作一个定制的小部件,提供一个可滚动的框架,它可以调整大小以适应它的内容或窗口,例如,如果内部框架的内容比画布的视图小,那么可以拉伸内容以适应视图,或者如果它们是更小的滚动条,则可以启用,但是为了使使用更简单,我希望能够做到重写在内部框架内打包或网格化小部件所需的任何方法。例如代替:
tk.按钮(滚动框。内部, ...)
我希望能够使用:
tk.按钮(滚动框,…)
但是,我目前无法解决的问题是:
__all__ = ['ScrolledFrame']
try:
import tkinter as tk
except ImportError:
import Tkinter as tk
class ScrolledFrame(tk.Frame):
def __init__(self, master=None, *args, **kwargs):
self.scrollbars = None
self.scroll_shown= [False, False]
if ('scrollbars' in kwargs):
self.scrollbars = kwargs['scrollbars']
del kwargs['scrollbars']
tk.Frame.__init__(self, master, *args, **kwargs)
self.grid_columnconfigure(1, weight=1)
self.grid_rowconfigure(1, weight=1)
self.vsb = tk.Scrollbar(self, orient='vertical')
self.hsb = tk.Scrollbar(self, orient='horizontal')
self.vsb.opts = {'column':2, 'row':1, 'sticky':'nesw'}
self.hsb.opts = {'column':1, 'row':2, 'sticky':'nesw'}
self.canvas = tk.Canvas(self, bd=0, highlightthickness=0,
yscrollcommand=self.vsb.set,
xscrollcommand=self.hsb.set)
self.canvas.grid(column=1, row=1, sticky='nesw')
self.vsb.config(command=self.canvas.yview)
self.hsb.config(command=self.canvas.xview)
self.canvas.xview_moveto(0)
self.canvas.yview_moveto(0)
self.canvas.bind('<Configure>', self._reconfigure)
self.frame = tk.Frame(self.canvas)
self.frame_id = self.canvas.create_window(0, 0, window=self.frame, anchor='nw')
self.frame.bind('<Configure>', self._reconfigure)
self.update_idletasks()
self._showscrollbars()
def _reconfigure(self, event=None):
f_reqsize = (self.frame.winfo_reqwidth(), self.frame.winfo_reqheight())
c_size = (self.canvas.winfo_width(), self.canvas.winfo_height())
self.canvas.config(scrollregion="0 0 %s %s" % f_reqsize)
if (f_reqsize[0] < c_size[0]):
self.canvas.itemconfigure(self.frame_id, width=c_size[0])
else:
self.canvas.itemconfigure(self.frame_id, width=f_reqsize[0])
if (f_reqsize[1] < c_size[1]):
self.canvas.itemconfigure(self.frame_id, height=c_size[1])
else:
self.canvas.itemconfigure(self.frame_id, height=f_reqsize[1])
if (self.scrollbars == 'auto'):
self._showscrollbars()
def _showscrollbars(self):
if (self.scrollbars == 'both'):
self.vsb.grid(**self.vsb.opts)
self.hsb.grid(**self.hsb.opts)
elif (self.scrollbars == 'x'):
self.vsb.grid_remove()
self.hsb.grid(**self.hsb.opts)
elif (self.scrollbars == 'y'):
self.vsb.grid(**self.vsb.opts)
self.hsb.grid_remove()
elif (self.scrollbars == 'auto'):
f_reqsize = (self.frame.winfo_reqwidth(), self.frame.winfo_reqheight())
c_size = (self.canvas.winfo_width(), self.canvas.winfo_height())
# start with vertical
if self.scroll_shown[1] == False: # not showing
if (f_reqsize[1] > c_size[1]): # height is greater than canvas so show
self.canvas.configure(width=self.canvas.winfo_width() - self.vsb.winfo_reqwidth())
self.vsb.grid(**self.vsb.opts)
self.scroll_shown[1] = True
else:
if (f_reqsize[1] <= c_size[1]): # height is less than canvas so don't show
self.vsb.grid_remove()
self.canvas.configure(width=self.canvas.winfo_width() + self.vsb.winfo_reqwidth())
self.scroll_shown[1] = False
# now horizontal
if self.scroll_shown[0] == False: # not showing
if (f_reqsize[0] > c_size[0]): # width is greater than canvas so show
self.canvas.configure(height=self.canvas.winfo_height() - self.hsb.winfo_reqheight())
self.hsb.grid(**self.hsb.opts)
self.scroll_shown[0] = True
else:
if (f_reqsize[0] <= c_size[0]): # width is less than canvas so don't show
self.hsb.grid_remove()
self.canvas.configure(height=self.canvas.winfo_height() + self.hsb.winfo_reqheight())
self.scroll_shown[0] = False
def resize(self):
self._reconfigure()
if __name__ == '__main__':
frames = []
def add_row():
frame = tk.Frame(sf.frame)
frame.grid_columnconfigure(1, weight=1)
frame.grid_columnconfigure(2, weight=1)
frame.grid_rowconfigure(1, weight=1)
num = len(frames)
tk.Label(frame, text='Test %i' % num).grid(column=1, row=1, sticky="nesw")
tk.Entry(frame).grid(column=2, row=1, sticky="nesw")
frame.grid(column=1, row=num, sticky='nesw')
sf.frame.grid_rowconfigure(num, weight=1)
frames.append(frame)
sf.resize()
def del_row():
frame = frames.pop()
frame.grid_forget()
frame.destroy()
num = len(frames)
sf.frame.grid_rowconfigure(num, weight=0)
sf.resize()
def add_column():
pass
def del_column():
pass
root = tk.Tk()
sf = ScrolledFrame(root, scrollbars='auto')
sf.frame.grid_columnconfigure(1, weight=1)
sf.grid(column=1, row=1, columnspan=2, rowspan=2, sticky='nesw')
tk.Button(root, text='-', command=del_row).grid(column=3, row=1, sticky='nesw')
tk.Button(root, text='+', command=add_row).grid(column=3, row=2, sticky='nesw')
tk.Button(root, text='-', command=del_column).grid(column=1, row=3, sticky='nesw')
tk.Button(root, text='+', command=add_column).grid(column=2, row=3, sticky='nesw')
root.grid_columnconfigure(1, weight=1)
root.grid_columnconfigure(2, weight=1)
root.grid_rowconfigure(1, weight=1)
root.grid_rowconfigure(2, weight=1)
root.mainloop()
所以在我的草图底部的测试代码中,我想更改add函数,使其frame = tk.Frame(sf)
不影响将外部框架打包/网格化到父窗口/框架中的能力,我该怎么做/我需要重写哪些方法/属性?在
我尝试重写__str__
和__repr__
来指向内部框架方法,但没有成功
您要查找的属性是
_w
。然而,仅仅使用它不会得到你想要的。问题是您需要将一些属性传递给外部框架,而其他属性传递给内部框架。通过与未初始化的小部件进行比较,您可以将哪些内容整理到哪里。然而,从Widget子类路由它非常困难,因为您需要重写属性。创建普通类(不是子类)并从中路由属性要容易得多:此解决方案的一个大缺点是自动
self.master
无法工作。当你向这个“框架”添加一个小部件时,self.master
链就是内部框架>;画布>;外部框架。这意味着如果你将这个类化,你必须显式地传递实例,因为“子”没有内置的方式来访问它。在我以前在尝试制作一个滚动框架小部件时就解决了这个问题。Here's my code, if you are interested它解决了另外几个问题,如跨平台鼠标滚轮绑定。在
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