Question

我试图用网格显示一个表，该表是270行70列显然太大了，无法一次显示所有照片。如果将行数限制为50，则需要12秒，当然，随着时间的增加，行数会更多，然后在某个时候它会变得很奇怪。是否要先设置例如20行的标签数据，然后进行显示，然后再设置下20行，将其添加到显示中，依此类推？

def populate_using_tkinter(frame, project_list):

    current_row_number = 0;

    # Columns ********************************************************************************************************
    label_id_column = Tkinter.Label(frame, text=Constants.PROJECT_COLUMN_TITLE_Id, borderwidth=GRID_BORDER_WIDTH, relief="solid", background=row_header_color)
    <more columns>
    label_ContractorID_column = Tkinter.Label(frame,text = Constants.PROJECT_COLUMN_TITLE_ContractorID, borderwidth = GRID_BORDER_WIDTH,relief = "solid")

    label_id_column.grid(row=current_row_number, column=Constants.PROJECT_ID_COLUMN, sticky="nsew")
    <more columns>
    label_ContractorID_column.grid(row=current_row_number, column=Constants.PROJECT_ContractorID_COLUMN, sticky="nsew")

    current_row_number +=1    
    frame.rowconfigure(current_row_number, minsize=row_height, weight=0)

    for project in project_list:
        project_id = project[0]
        <more assignments>
        project_ContractorID = project[70]

        # Data ********************************************************************************************************
        try:
            label_project_id = Tkinter.Label(frame, text=project_id, borderwidth=GRID_BORDER_WIDTH, relief="solid", background=row_color)
            <more data>
            label_project_ContractorID=Tkinter.Label(frame,text=projectContractorID,anchor="w",borderwidth=GRID_BORDER_WIDTH,relief="solid", background=row_color)

            label_project_id.grid(row=current_row_number, column=Constants.PROJECT_ID_COLUMN, sticky="nsew")
            <more data>
            label_project_ContractorID.grid(row=current_row_number, column=Constants.PROJECT_ContractorID_COLUMN, sticky="nsew") 

        except IndexError:
            print ("[ERROR] IndexError: " + str(current_row_number) )

        current_row_number +=1    


def main():

    project_list = <get from database>    # 270 x 70

    root = Tkinter.Tk()

    canvas = Tkinter.Canvas(root, borderwidth=0, background="#ffffff")
    frame = Tkinter.Frame(canvas, background="#ffffff")

    canvas.pack(side="left", fill="both", expand=True)
    canvas.create_window((4,4), window=frame, anchor="nw")

    frame.bind("<Configure>", lambda event, canvas=canvas: onFrameConfigure(canvas))

    populate_using_tkinter(frame, project_list) 

    root.geometry("1000x600")

    root.mainloop()

Answer 1

这听起来像是更适合treeview小部件的工作。但是，如果要改为使用标签表，则一种方法是将生成器与after方法结合使用：

import tkinter as tk

root = tk.Tk()
data = {i:i for i in range(200)}

def display_data():
    row = 0
    for k,v in data.items():
        tk.Label(root,text=k).grid(row=row,column=0)
        tk.Label(root,text=v).grid(row=row,column=1)
        row+=1
        if not row % 5: #configure this to display the number of rows each second
            root.after(1000, fetch)
            yield

a = display_data()

def fetch():
    try:
        next(a)
    except StopIteration:
        return

root.after(1000, fetch)

root.mainloop()

或者您也可以将其放在treeview中。通常，我发现这更易于显示数据，并且它还提供了许多方便的方法，使您可以进行排序，导出等。我还添加了垂直和水平滚动条以供参考。

from tkinter import ttk
import tkinter as tk

root = tk.Tk()

class TreeFrame(tk.Frame):
    def __init__(self,master,**kwargs):
        tk.Frame.__init__(self,master,**kwargs)
        self.tree = ttk.Treeview(self, selectmode='extended', height=24)
        self.tree.grid(row=0,column=0,sticky="nsew")
        vsb = ttk.Scrollbar(self, orient="vertical",command=self.tree.yview)
        vsb.grid(row=0,column=1,sticky="ns")
        hsb = ttk.Scrollbar(self, orient="horizontal",command=self.tree.xview)
        hsb.grid(row=1,column=0,sticky="ew")
        self.tree.configure(yscrollcommand=vsb.set)
        self.tree.configure(xscrollcommand=hsb.set)
        header = [i for i in range(70)]
        self.tree["columns"] = header
        self.tree['show'] = 'headings'
        self.start = 0
        for i in range(len(header)):
            self.tree.column(header[i], width=15, minwidth=27, anchor="w")
            self.tree.heading(header[i], text=header[i], anchor='w')

    def dummy_data(self):
        for i in range(self.start, self.start+20):
            current = self.tree.insert("","end",values=[i for _ in range(70)])
            self.tree.see(current)
        self.start += 20
        if self.start >= 270:
            return
        else:
            root.after(1000,self.dummy_data)

tree_frame = TreeFrame(root)
tree_frame.pack()

tk.Button(root,text="Add dummy data",command=tree_frame.dummy_data).pack()

root.mainloop()

显示带有网格的大表

1 个答案: