利用CtkSwitch切换Ping命令：实现单次/持续Ping功能需求

需求概述 #

通过CtkSwitch组件切换Ping行为：

• 开关默认关闭时，执行单次Ping命令：ping {hostname}
• 开关开启时，执行持续Ping命令：ping -t {hostname}

修改后的完整代码 #

import customtkinter
import os

customtkinter.set_appearance_mode("Dark")
customtkinter.set_default_color_theme("blue")


class App(customtkinter.CTk):
    def __init__(self):
        super().__init__()

        # 窗口配置
        self.title("STEVE's IRT TOOL")
        self.geometry(f"{1100}x{580}")
        self.resizable(False, False)
        self.iconbitmap('icon.ico')

        # 网格布局配置
        self.grid_columnconfigure(1, weight=1)
        self.grid_columnconfigure((2, 3), weight=0)
        self.grid_rowconfigure((0, 1, 2), weight=1)

        # 侧边栏框架及组件
        self.sidebar_frame = customtkinter.CTkFrame(self, width=140, corner_radius=0)
        self.sidebar_frame.grid(row=0, column=0, rowspan=4, sticky="nsew")
        self.sidebar_frame.grid_rowconfigure(4, weight=1)

        self.logo_label = customtkinter.CTkLabel(self.sidebar_frame, text="IRT Tool", font=customtkinter.CTkFont(size=20, weight="bold"))
        self.logo_label.grid(row=0, column=0, padx=20, pady=(20, 10))

        self.info = customtkinter.CTkEntry(self.sidebar_frame, placeholder_text="Enter Input")
        self.info.grid(row=1, column=0, padx=20, pady=10)

        self.sidebar_button_ping = customtkinter.CTkButton(self.sidebar_frame, text="Ping", fg_color="transparent", border_width=2, text_color=("gray10", "#DCE4EE"), command=self.button_ping)
        self.sidebar_button_ping.grid(row=2, column=0, padx=20, pady=10)

        self.switch_var = customtkinter.StringVar(value="off")
        self.switch = customtkinter.CTkSwitch(self.sidebar_frame, text="Constant", variable=self.switch_var, onvalue="on", offvalue="off")
        self.switch.grid(row=3, column=0, padx=20, pady=10)

        # 外观模式设置
        self.appearance_mode_label = customtkinter.CTkLabel(self.sidebar_frame, text="Appearance Mode:", anchor="w")
        self.appearance_mode_label.grid(row=9, column=0, padx=20, pady=(10, 0))
        self.appearance_mode_optionemenu = customtkinter.CTkOptionMenu(self.sidebar_frame, values=["Light", "Dark", "System"], command=self.change_appearance_mode_event)
        self.appearance_mode_optionemenu.grid(row=10, column=0, padx=20, pady=(10, 10))

        # 输出窗口
        self.print_out = customtkinter.CTkTextbox(self, width=250)
        self.print_out.grid(row=0, rowspan=2, column=1, padx=(20, 0), pady=(20, 0), sticky="nsew")

    def read_output(self, fp):
        line = fp.readline()
        if line:
            self.print_out.insert("end", line)
            self.print_out.see("end")
            self.print_out.after(10, self.read_output, fp)

    def button_ping(self):
        hostname = self.info.get()
        # 根据开关状态构造Ping命令
        if self.switch_var.get() == "on":
            cmd = f"ping -t {hostname}"
        else:
            cmd = f"ping {hostname}"
        fp = os.popen(cmd)
        self.read_output(fp)

    def change_appearance_mode_event(self, new_appearance_mode: str):
        customtkinter.set_appearance_mode(new_appearance_mode)

    def sidebar_button_event(self):
        print("sidebar_button click")


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

关键改动说明 #

• 移除全局变量：将info、print_out、switch_var改为实例变量（self.xxx），避免全局变量带来的作用域问题，代码更规范。
• 简化Switch逻辑：不需要单独的switch_event函数，直接在button_ping中读取switch_var的状态来构造命令，减少冗余代码。
• 修正命令参数：关闭状态下直接执行默认单次Ping，不再错误使用-r参数；开启状态下添加-t参数实现持续Ping。
• 调整内部函数为实例方法：将read_output和button_ping改为类的实例方法，确保能正确访问实例变量。

内容的提问来源于stack exchange，提问作者Steve