Question

我正在制作一个程序，该程序使用PyMySQL模块获取数据库记录，然后在Tkinter Entries中显示这些记录。我已经有执行此操作的代码，但是我想添加一个功能。

我想为用户提供对行的条目进行 doubleclick 的功能，并获取该行的所有Entry文本并将其解析为我在For循环之前声明的文本框中（UserID，First_Name等等）。假设我每行有5个条目。例如，如果用户双击在第1行的条目2上，我想从第1行的所有条目中获取文本并将其分别解析到文本框中。

这是我当前拥有的代码：

window = tk.Tk()
window.title("Flexbase") #Give window a name
window.update_idletasks()
width = 640
height = 480
x = (window.winfo_screenwidth() // 2) - (width // 2)
y = (window.winfo_screenheight() // 2) - (height // 2)
window.geometry('+{}+{}'.format(x, y))

GetRows_StringVariable = "SELECT * FROM SEC_USER"
cursor.execute(GetRows_StringVariable)
results = cursor.fetchall()

RowCounter = 1
ColumnCounter = -1
ListCounter = 0
RowListCounter = 0

rows = []

id_list = []
firstname_list = []
surname_list = []
username_list = []
email_list = []
password_list = []

tk.Label(window, text="Testing").grid(row=0, column=0, sticky=NSEW)
UserID_TextBox = tk.Entry(window, width=20, bg="white") #Create text box
UserID_TextBox.grid(row=1, column=0, sticky=W) #Give the text box a position in the window
FirstName_TextBox = tk.Entry(window, width=60, bg="white")
FirstName_TextBox.grid(row=2, column=0, sticky=W)
Surname_TextBox = tk.Entry(window, width=60, bg="white")
Surname_TextBox.grid(row=3, column=0, sticky=W)
Email_TextBox = tk.Entry(window, width=60, bg="white")
Email_TextBox.grid(row=4, column=0, sticky=W)
Username_TextBox = tk.Entry(window, width=20, bg="white")
Username_TextBox.grid(row=5, column=0, sticky=W)
Password_TextBox = tk.Entry(window, show="*", width=20, bg="white")
Password_TextBox.grid(row=6, column=0, sticky=W)

notebook = ttk.Notebook(window)
notebook.grid(row=7, column=0, sticky=NSEW)

page1 = ttk.Frame(notebook)
notebook.add(page1, text="Mass Editing Mode")
tk.Label(page1, text=SQL_ID, fg="black", font="Arial 8 bold").grid(row=0, column=0, sticky=W)
tk.Label(page1, text=SQL_FIRSTNAME, fg="black", font="Arial 8 bold").grid(row=0, column=1, sticky=W)
tk.Label(page1, text=SQL_SURNAME, fg="black", font="Arial 8 bold").grid(row=0, column=2, sticky=W)
tk.Label(page1, text=SQL_USERNAME, fg="black", font="Arial 8 bold").grid(row=0, column=3, sticky=W)
tk.Label(page1, text=SQL_EMAIL, fg="black", font="Arial 8 bold").grid(row=0, column=4, sticky=W)


for row in results: # Page 1 TAB
    ColumnCounter += 1
    id_list.append(row[SQL_ID])
    a = tk.Entry(page1, fg="black", font="Arial 8 bold")
    a.grid(row=RowCounter, column=ColumnCounter, sticky=W)
    a.insert(0, row[SQL_ID])
    ColumnCounter += 1
    firstname_list.append(row[SQL_FIRSTNAME])
    b = tk.Entry(page1, fg="black", font="Arial 8 bold")
    b.grid(row=RowCounter,column=ColumnCounter,sticky=W)
    b.insert(0, row[SQL_FIRSTNAME])
    ColumnCounter += 1
    surname_list.append(row[SQL_SURNAME])
    c = tk.Entry(page1, fg="black", font="Arial 8 bold")
    c.grid(row=RowCounter,column=ColumnCounter,sticky=W)
    c.insert(0, row[SQL_SURNAME])
    ColumnCounter += 1
    username_list.append(row[SQL_USERNAME])
    d = tk.Entry(page1, fg="black", font="Arial 8 bold")
    d.grid(row=RowCounter, column=ColumnCounter, sticky=W)
    d.insert(0, row[SQL_USERNAME])
    ColumnCounter += 1
    email_list.append(row[SQL_EMAIL])
    e = tk.Entry(page1, fg="black", font="Arial 8 bold")
    e.grid(row=RowCounter, column=ColumnCounter, sticky=W)
    e.insert(0, row[SQL_EMAIL])

    RowCounter += 1
    ColumnCounter = -1
    ListCounter += 1
    RowListCounter += 1

此代码产生一个窗口，每行有5个条目。

Answer 1

您可以在创建tk.Entry对象之后添加此内容：

    for obj in (a, b, c, d):
        def double_click(ev, RowCounter=RowCounter):
            print("selected row:", RowCounter)
        obj.bind("<Double-Button>", double_click)

（需要{RowCounter=RowCounter来捕获当前行值。）

有了行号，您应该能够从results对象获得所需的内容。

Answer 2

正如@Florian Weimer所解释的那样，您需要定义一个或多个回调函数，并将其附加在每个Entry上。

除此之外，我认为您可以（并且应该）消除所拥有的多余代码，这将使其变得更小，更容易进行工作和增强。在软件开发中，这被称为DRY，因为“不要重复自己”的原则。

由于我没有您的数据库，因此我必须添加以下行：

db_keys = results[0].keys()  # Get list of keys from the first result.

以获得每个记录/行中所需的键列表。您的数据库架构中可能已经有这样的列表，或者希望以其他方式创建它。

import tkinter as tk
from tkinter import ttk
from tkinter.constants import *


window = tk.Tk()
window.title("Flexbase") #Give window entry name
window.update_idletasks()
width = 640
height = 480
x = (window.winfo_screenwidth() // 2) - (width // 2)
y = (window.winfo_screenheight() // 2) - (height // 2)
window.geometry('+{}+{}'.format(x, y))

GetRows_StringVariable = "SELECT * FROM SEC_USER"
#cursor.execute(GetRows_StringVariable)
#results = cursor.fetchall()

db_keys = results[0].keys()  # Get list of keys from the first result.

tk.Label(window, text="Testing").grid(row=0, column=0, sticky=NSEW)

# Create textbox Entry widgets.
textbox_ids = list(db_keys) + ['Password']
textbox_widths = 20, 60, 60, 60, 20, 20
textbox_shows  = '', '', '', '', '', '*'
textboxes = {}
for i, (id, width, show) in enumerate(zip(textbox_ids, textbox_widths, textbox_shows), 1):
    textboxes[id] = tk.Entry(window, width=width, show=show, bg="white")
    textboxes[id].grid(row=i, column=0, sticky=W)

# Double-click callback function for items in result rows.
def double_click_cb(ev, row):
    # Replace current values in textboxes with those from the selected row.
    for key, value in row.items():
        textboxes[key].delete(0, END)
        textboxes[key].insert(0, value)

notebook = ttk.Notebook(window)
notebook.grid(row=7, column=0, sticky=NSEW)

page1 = ttk.Frame(notebook)
notebook.add(page1, text="Mass Editing Mode")
nb_font = "Arial 8 bold"

# Create header row.
for i, key in enumerate(db_keys):
    tk.Label(page1, text=key, fg="black", font=nb_font).grid(row=0, column=i, sticky=W)

# Display results.
id_list = []
RowCounter = 1
for row in results:
    for ColumnCounter, key in enumerate(db_keys):
        id_list.append(row[key])
        entry = tk.Entry(page1, fg="black", font=nb_font)
        entry.grid(row=RowCounter, column=ColumnCounter, sticky=W)
        entry.insert(0, row[key])
        entry.bind("<Double-Button>", lambda e, r=row: double_click_cb(e, r))
    RowCounter += 1

window.mainloop()

Tkinter-双击获取条目文本（for循环）

2 个答案: