树视图中的行选择

Question

每次随着行更新以下代码select所有行。

child_id =treeview.get_children()
treeview.selection_set(child_id)

我不能只 select 使用控件的特定行并且每次只有 selected 行再次获得 selects

示例代码：

from tkinter import ttk
import tkinter
import threading

def main():
    root = tkinter.Tk()
    
    ccols = ('num1','num2')
    treeview = ttk.Treeview(root, columns=ccols)
    for col in ccols:
        treeview.heading(col, text=col)
    treeview.grid(row=8, column=0)
    
    def sample():
       for i in range(50):
           treeview.delete(*treeview.get_children()) 
           a=(treeview.insert("","end",values=(i,0)))
           a=(treeview.insert("","end",values=(i,0)))
           a=(treeview.insert("","end",values=(i,0)))
           
           child_id =treeview.get_children()
           treeview.selection_set(child_id)
               
       threading.Timer(4.0, sample).start()

    sample()
    root.mainloop()


if __name__ == '__main__':
    main()

Answer 1

您可以保存 selected 行的当前索引。然后在更新树视图后，通过保存的索引获取行 ID，并使用行 ID select 获取行：

def sample():
    # save the indexes of selected rows
    indexes = [treeview.index(id) for id in treeview.selection()]
    # update treeview
    for i in range(50):
        treeview.delete(*treeview.get_children()) 
        treeview.insert("", "end", values=(i,0))
        treeview.insert("", "end", values=(i,0))
        treeview.insert("", "end", values=(i,0))
    # select the rows using the saved indexes
    for idx in indexes:
        child_id = treeview.get_children()[idx]
        treeview.selection_add(child_id)
               
    threading.Timer(4.0, sample).start()

树视图中的行选择

Row selection in treeview

python

treeview

tkinter