import tkinter as tk
from tkinter import ttk

def main():
    root = tk.Tk()
    root.title("Ukázka rozložení")
    root.geometry("800x600")

    # ==== MENU ====
    menu_bar = tk.Menu(root)
    root.config(menu=menu_bar)

    file_menu = tk.Menu(menu_bar, tearoff=0)
    file_menu.add_command(label="Otevřít")
    file_menu.add_command(label="Ukončit", command=root.quit)
    menu_bar.add_cascade(label="Soubor", menu=file_menu)

    # ==== HLAVNÍ RÁM ====
    main_frame = tk.Frame(root)
    main_frame.pack(fill="both", expand=True)

    main_frame.columnconfigure(0, weight=1)
    main_frame.columnconfigure(1, weight=2)
    main_frame.rowconfigure(0, weight=1)

    # ==== VLEVO: STROM ====
    tree = ttk.Treeview(main_frame)
    tree.grid(row=0, column=0, sticky="nsew", padx=2, pady=2)

    root_node = tree.insert("", "end", text="Root")
    tree.insert(root_node, "end", text="Child 1")
    tree.insert(root_node, "end", text="Child 2")
    tree.item(root_node, open=True)

    # ==== VPRAVO: SEZNAM ====
    listbox = tk.Listbox(main_frame)
    listbox.grid(row=0, column=1, sticky="nsew", padx=2, pady=2)

    for i in range(1, 21):
        listbox.insert("end", f"Položka {i}")

    # ==== STAVOVÝ ŘÁDEK ====
    status_bar = tk.Label(root, text="Připraven", anchor="w", relief="sunken")
    status_bar.pack(side="bottom", fill="x")

    # ==== KONTEXTOVÁ MENU ====
    tree_menu = tk.Menu(root, tearoff=0)
    tree_menu.add_command(label="Akce na stromu", command=lambda: status_bar.config(text="Klikl jsi na strom"))

    list_menu = tk.Menu(root, tearoff=0)
    list_menu.add_command(label="Akce na seznamu", command=lambda: status_bar.config(text="Klikl jsi na seznam"))

    # ==== HANDLERY ====
    def tree_right_click(event):
        item_id = tree.identify_row(event.y)
        if item_id:  # klik na uzel
            tree.selection_set(item_id)
            tree_menu.tk_popup(event.x_root, event.y_root)

    def list_right_click(event):
        index = listbox.nearest(event.y)
        if index >= 0:  # klik na položku
            listbox.selection_clear(0, "end")
            listbox.selection_set(index)
            list_menu.tk_popup(event.x_root, event.y_root)

    tree.bind("<Button-3>", tree_right_click)
    listbox.bind("<Button-3>", list_right_click)

    root.mainloop()

if __name__ == "__main__":
    main()