绑定键点击选择的项目从一棵树与Python tkinter

Question

我正在一个“树视图”病人列表，我们可以在其中搜索病人，并选择一个。我想对所选择的患者用鼠标右键单击，并与有关病人信息翻开新的一页：

try: 
    import tkinter 
    from tkinter import ttk 
except ImportError: 
    import Tkinter as tkinter 
    import ttk 


class Mainpage: 

    def __init__(self, master): 
     self.master = master 
     self.frame = tkinter.Frame(self.master) 
     self.master.columnconfigure(0, weight=1) 
     self.master.columnconfigure(1, weight=3) 
     self.master.columnconfigure(2, weight=1) 
     self.master.columnconfigure(3, weight=1) 
     self.master.columnconfigure(4, weight=1) 

     self.searchfield = tkinter.Frame(self.master) 
     self.searchfield.grid(row=1, column=0, columnspan=4) 

     self.search_var = tkinter.StringVar() 
     self.search_var.trace("w", lambda name, index, mode: self.selected) 
     self.entry = tkinter.Entry(self.searchfield, textvariable=self.search_var, width=45) 
     self.entry.grid(row=0, column=0, padx=10, pady=3) 
     self.searchbtn = tkinter.Button(self.searchfield, text='Search', command=self.selected) 
     self.searchbtn.grid(row=0, column=1) 
     self.treeFrame = tkinter.Listbox(self.searchfield, width=45, height=150) 
     self.treeFrame.grid(row=1, column=0, padx=10, pady=3) 

     self.tree = ttk.Treeview(self.treeFrame, columns=('Status', 'Name', 'Date')) 
     self.tree.heading('#0', text='Status') 
     self.tree.heading('#1', text='Name') 
     self.tree.heading('#2', text='Date') 
     self.tree.heading('#3', text='Transact Code') 
     self.tree.column('#0', stretch=tkinter.YES) 
     self.tree.column('#1', stretch=tkinter.YES) 
     self.tree.column('#2', stretch=tkinter.YES) 
     self.tree.column('#3', stretch=tkinter.YES) 
     self.tree.grid(row=0, columnspan=4, sticky='nsew') 
     self.treeview = self.tree 

     self.i = 1 
     self.patient_list = [{"Name":"Harry Thuku", "Date":"07.09.2017"}, 
          {"Name":"stella stl", "Date": "07.09.2017"}, 
          {"Name":"geg be", "Date": "07.09.2017"}, 
          {"Name":"Henry Reeta", "Date": "06.09.2017"}, 
          {"Name":"Henry Reeta", "Date": "06.09.2017"}] 

     for p in self.patient_list: 
      self.tree.insert('', 'end', text="ID_"+str(self.i), values= 
      (p["Name"], p["Date"]), tags=p["Name"]) 
      self.i = self.i + 1 

     self.search_item = self.entry.get() 
     for p in self.patient_list: 
      if p["Name"] == self.search_item: 
       self.selected(self.search_item) 

     self.frame.bind("<Button-3>", self.click) 
     self.frame.grid_location(0, 0) 


    def selected(self): 
     search_for = self.search_var.get() 
     iid_to_select =() 

     if search_for != '': 
      all_tags = self.master.tk.call(str(self.tree), "tag", "names") 
      tags_to_select = tuple(filter(lambda tag: search_for.lower() in tag.lower(), all_tags)) 
      for sorted_tag in tags_to_select: 
       iid_to_select += self.tree.tag_has(sorted_tag) 

     self.tree.selection_set(iid_to_select) 

    def click(self, event): 
     print("Clicked at: ", event.x, event.y) 
     self.master.withdraw() 
     self.toplevel = tkinter.Toplevel(self.master) 
     self.toplevel.geometry("480x480") 
     app = PatientPage(self.toplevel) 


class PatientPage: 
    #..... 
    pass 



root = tkinter.Tk() 
root.title("Login") 
root.geometry("480x480") 
Mainpage(root) 
root.mainloop() 

我无法结合新窗口打开鼠标右键，我做一些编码，但我不是100％理解它，因此它不工作...

任何关于这个问题的想法将是有益的和赞赏！

Answer 1

首先在树上绑定右键，而不是在fram上，即用self.tree.bind("<Button-3>", self.click)替换self.frame.bind("<Button-3>", self.click)。

然后，您需要知道用户点击了树视图中的哪个项目。为此，您可以使用self.tree.identify_row(event.y)，它返回位置为event.y的项目的ID。

而且，如果需要，您可以使用self.tree.item(<item>, 'values')检索存储在树形视图中的患者信息。

所以click变为：

def click(self, event): 
    item = self.tree.identify_row(event.y) 
    if item: # right click on a patient 
     self.master.withdraw() 
     self.toplevel = tkinter.Toplevel(self.master) 
     self.toplevel.geometry("480x480") 
     info = self.tree.item(item, 'values') 
     print(info) 
     app = PatientPage(self.toplevel)