Question

我这里有几行代码来检测tkinter treeview中是否已存在某个项目，然后才能在tree2中插入所选项目。如果该项目已存在，则应打印"item exist"如果不是，则应插入该项目。

from tkinter import ttk
import tkinter as tk


blow = [("january", "2013"),("february", "2014"),("march", "2015"),("april", "2016"),("may", "2017")]

def append_select():
    cur_id = tree.focus()

    for child in tree2.selection():
    #for child in tree2.get_children():
        if cur_id in child:
            print("item exist")
        elif cur_id:
            tree2.insert("", tk.END, values=tree.item(cur_id)['values'])


root = tk.Tk()
root.geometry("500x500")

tree = ttk.Treeview(columns=("columns1", "columns"), show="headings", selectmode="browse")
tree.heading("#1", text="Month")
tree.heading("#2", text="Year")
for n in blow:
    tree.insert("", tk.END, values=(n))
tree.pack()

b1 = tk.Button(text="append", command=append_select)
b1.pack()

tree2 = ttk.Treeview(columns=("Month", "Year"), show="headings")
tree2.heading("#1", text="month")
tree2.heading("#2", text="year")
tree2.pack()

root.mainloop()

Answer 1

我在树视图中搜索了项目文本以检查重复。

def search(treeview, comparevalue):
    children = treeview.get_children('')
    for child in children:
        values = treeview.item(child, 'values')
        if comparevalue[0]==values[0] and str(comparevalue[1])==str(values[1]):
            return True
    return False

def append_select():
    cur_id = tree.focus()
    selvalue = tree.item(cur_id)['values']
    print('append_select:', cur_id, selvalue)

    if search(tree2, selvalue)==True:
        print("item exist")
    elif cur_id:
        tree2.insert("", tk.END, values=selvalue)

但更简单的方法是使用项目iid。

def append_select():
    cur_id = tree.focus()
    selvalue = tree.item(cur_id)['values']
    if tree2.exists(cur_id)==True:
        print("item exist")
    elif cur_id:
        tree2.insert("", tk.END, cur_id,  values=selvalue)

如何检测树视图中是否存在项目

1 个答案: