在 Tkinter 中跨 Frame 传递变量的专业方法

import tkinter as tk
from tkinter import ttk
import customtkinter as ctk

class SearchFrame(ctk.CTkFrame):
    def __init__(self, parent, controller):
        ctk.CTkFrame.__init__(self, parent)
        self.title = ctk.CTkLabel(self, text="Search")
        self.title.pack()

        self.searchBar = ctk.CTkEntry(self)
        self.searchBar.pack()

        self.searchBtn = ctk.CTkButton(self, text="Search", command=lambda: self.search(controller, self.searchBar.get()))
        self.searchBtn.pack()

    def search(self, controller, query):
        # 模拟数据库查询
        results = self.query_database(query)

        # 切换到 SearchResultsFrame 并传递结果
        controller.show_frame(SearchResultsFrame)
        SearchResultsFrame.populate_page(self, results)

    def query_database(self, query):
        # 实际应用中，这里应该执行 SQL 查询
        # 这里为了演示，返回一个模拟的结果
        return [
            {"Name": "Company A", "Industry": "Tech", "Postcode": "10001", "Status": "Active"},
            {"Name": "Company B", "Industry": "Finance", "Postcode": "20002", "Status": "Inactive"},
        ]

class SearchResultsFrame(ctk.CTkFrame):
    def __init__(self, parent, controller):
        ctk.CTkFrame.__init__(self, parent)

        self.title = ctk.CTkLabel(self, text='Search Results')
        self.title.pack()

        self.companies_title = ctk.CTkLabel(self, text='Companies:')
        self.companies_title.pack()

        self.searchResults_columns = [
            'Name',
            'Industry',
            'Postcode',
            'Status'
        ]

        self.searchResults_tree = ttk.Treeview(self, columns=self.searchResults_columns, show='headings')

        self.treeFormat(self.searchResults_columns, self.searchResults_tree)
        self.searchResults_tree.pack(expand=True, fill='both')

        self.home_btn = ctk.CTkButton(self, text="Home", command=lambda: controller.show_frame(DashboardFrame))
        self.home_btn.pack()

    def populate_page(self, results):
        # 清空之前的搜索结果
        for item in self.searchResults_tree.get_children():
            self.searchResults_tree.delete(item)

        # 将搜索结果插入到 Treeview 中
        for row in results:
            self.searchResults_tree.insert("", tk.END, values=(row['Name'], row['Industry'], row['Postcode'], row['Status']))

    def treeFormat(self, columns, tree):
        for col in columns:
            tree.heading(col, text=col)
            tree.column(col, width=100)  # 设置列宽

class DashboardFrame(ctk.CTkFrame):
    def __init__(self, parent, controller):
        ctk.CTkFrame.__init__(self, parent)
        label = ctk.CTkLabel(self, text="Dashboard")
        label.pack(padx=10, pady=10)

        button1 = ctk.CTkButton(self, text="Go to Search",
                            command=lambda: controller.show_frame(SearchFrame))
        button1.pack()

class MainApp(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)

        self.geometry("800x600")
        self.title("CRM App")

        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand=True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}
        for F in (DashboardFrame, SearchFrame, SearchResultsFrame):
            frame = F(container, self)
            self.frames[F] = frame
            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(DashboardFrame)

    def show_frame(self, cont):
        frame = self.frames[cont]
        frame.tkraise()

if __name__ == "__main__":
    app = MainApp()
    app.mainloop()