python - 为 Tkinter 小部件启用 "setgrid"选项

Question

我正在使用 Tkinter 的 grid 几何管理器生成一个在第 2 列中包含水平滚动文本的表格。我尝试创建一个位于第 2 列中的 Listbox 小部件(作为整个框架的子级)并跨越所有行。这看起来很有希望，直到发现列表框中的文本行与父网格的行不对齐为止。我一直在徒劳地寻找一种方法来填充列表框中的每一行文本以使行匹配；但即使这是可能的，我也更喜欢一个更通用、不那么笨拙的解决方案。

我最近偶然发现了一个description网格几何管理的内容暗示了小部件的 setgrid 选项。它声称完全符合我的要求:即“[确定]此小部件是否控制其顶级窗口的调整网格大小。”我尝试在我的 Listbox 小部件中启用此选项，但无济于事。我是否误解了 setgrid 的目的/用法？

(为了查看下面代码的问题，请使用选择文件或选择文件夹按钮将多个音频文件加载到文件列表中。)

#! /usr/bin/env python

#################################################
# This tool allows the user to select audio files 
# (or folders containing audio files) and subject 
# them to loudness analysis.
#################################################

import sys
import os
import codecs
import re
import Tkinter
from Tkinter import *
import tkFileDialog
from os import walk
from os import path
from Tkinter import Tk, Text, BOTH, W, N, E, S
from ttk import Frame, Button, Label, Style, Progressbar
from ScrolledText import *
from progressbar import ProgressBar

class Leveler_tk(Frame):
    fileList = []
    allowedExtensions = ['mp3','mp2','m4a','aiff','wav']

    def __init__(self, parent):
        Frame.__init__(self, parent)
        self.parent = parent
        self.initialize()

    def initialize(self):
        self.style = Style()
        self.style.theme_use("default")
        self.pack(fill=BOTH, expand=1)

        self.columnconfigure(1, weight=1)
        self.columnconfigure(2, weight=1)
        self.columnconfigure(2, pad=250)
        self.columnconfigure(3, weight=1)
        self.columnconfigure(4, weight=1)
        self.columnconfigure(5, weight=1)

        lbl1 = Label(self, text="Analyze")
        lbl1.grid(pady=4, padx=5,row=0,column=0)

        lbl2 = Label(self, text="Adjust")
        lbl2.grid(pady=4, padx=5,row=0,column=1)

        lbl3 = Label(self, text="File")
        lbl3.grid(pady=4, padx=5,row=0,column=2)

        lbl4 = Label(self, text="Integrated\nLoudness")
        lbl4.grid(pady=4, padx=5,row=0,column=3)

        lbl5 = Label(self, text="LRA")
        lbl5.grid(pady=4, padx=5,row=0,column=4)

        lbl6 = Label(self, text="Peak")
        lbl6.grid(pady=4, padx=5,row=0,column=5)

        lbl7 = Label(self, text="Progress")
        lbl7.grid(pady=4, padx=5,row=0,column=6)

        lbl8 = Label(self, text="Meets\nSpecs?")
        lbl8.grid(sticky=W, pady=4, padx=5,row=0,column=7)

        file_btn = Button(self, text="Select File",command=self.selectFile)
        file_btn.grid(row=1,rowspan=2, column=8,padx=5,pady=4)

        folder_btn = Button(self, text="Select Folder", command=self.selectFolder)
        folder_btn.grid(row=3, rowspan=2, column=8,padx=5,pady=4)

    def render(self):
        count = 0
        filebox = Listbox(self,selectmode=EXTENDED,setgrid=1)
        scrollbar = Scrollbar(filebox, orient=HORIZONTAL)
        scrollbar.config(command=filebox.xview)
        filebox.grid(row=1, column=2, rowspan=len(self.fileList), columnspan=1, sticky=N+S+E+W)
        filebox.config(xscrollcommand=scrollbar.set)
        scrollbar.pack(side=BOTTOM, fill=X)
        for file in self.fileList:
            analyze = IntVar()
            adjust = IntVar()
            Radiobutton(self, text="", variable=analyze, value=count, borderwidth=0).grid(row=count+1, column=0)
            Radiobutton(self, text="", variable=adjust,  value=count, borderwidth=0).grid(row=count+1, column=1)
            filebox.insert(END, file + "\n")
            Progressbar(self, orient=HORIZONTAL,length=100, mode='determinate').grid(row=count+1, column=6)
            count += 1

    def addToList(self, name):
        dot = re.search("\.(?=[^.]*$)",name)
        extension = name[dot.end():]
        if extension in self.allowedExtensions and not name in self.fileList:
            self.fileList.append(name)

    def selectFile(self):
        input = tkFileDialog.askopenfilename(filetypes = [('MP3', '*.mp3'), ('MP2', '*.mp2'), ('M4A', '*.m4a'), ('AIFF', '*.aiff'), ('WAV', '*.wav')], multiple = 1)
        for el in input:
            if os.path.isfile(el) and ".DS_Store" not in el:
                try:
                    self.addToList(el)
                except:
                    tkMessageBox.showerror("Some error")
        self.render()

    def selectFolder(self):
        input = tkFileDialog.askdirectory()
        for (dirpath, dirnames, filenames) in walk(input):
            for name in filenames:
                if name != ".DS_Store":
                    self.addToList(dirpath + "/" + name)
        self.render()

def main():
    root = Tk()
    app = Leveler_tk(root)
    root.mainloop()

if __name__ == "__main__":
    main()

Answer 1

我认为您误解了setgrid。

这样，具有基于像素以外的其他内容的自然大小的小部件(例如文本小部件，其大小基于字符)可以防止父级将其设置为不自然的大小(例如: 20.5 个字符)。使用setgrid，当您以交互方式调整窗口大小时，它将以网格单位(例如:字符高度或宽度)而不是像素来调整大小。

setgrid 不会阻止调整大小，而是确保调整大小以其他单位的倍数进行。

以下是来自 tcl/tk 手册的 setgrid 选项的完整、权威的引用:

Specifies a boolean value that determines whether this widget controls the resizing grid for its top-level window. This option is typically used in text widgets, where the information in the widget has a natural size (the size of a character) and it makes sense for the window's dimensions to be integral numbers of these units. These natural window sizes form a grid. If the setGrid option is set to true then the widget will communicate with the window manager so that when the user interactively resizes the top-level window that contains the widget, the dimensions of the window will be displayed to the user in grid units and the window size will be constrained to integral numbers of grid units. See the section GRIDDED GEOMETRY MANAGEMENT in the wm manual entry for more details.