Selectmode 多个连同动态搜索栏 Tkinter

The search function works perfectly fine, however, once a search has been done and an item has been selected, the selections is not saved since the lbox.delete function is used in update_list. Is there a way to keep each item selected while using the search function?

推荐答案

这是我想到的.我不知道你是否还需要它，但我还是会发布它.我基本上添加了代码来将值设置为选中，如果它们在用户选择列表中，则在条目小部件更改后刷新列表框，并在用户取消选择时将其从用户选择中删除，而不管当前列表框中的内容如何.

This is what I came up with. I don't know if you need it anymore but I'll post it anyway. I've basically added code to set values as selected if they are in user selection list after the listbox is refreshed on a change in Entry widget, and to remove it from user selection if user deselects irrespective of what is currently in the listbox.

from tkinter import *

sel=list()

# First create application class
class Application(Frame):

    def __init__(self, master=None):
        Frame.__init__(self, master)

        self.pack()
        self.create_widgets()

    def CurSelet(self,evt):
        global sel
        temp=list()
        for i in self.lbox.curselection():
            temp.append(self.lbox.get(i))

        allitems=list()
        for i in range(self.lbox.size()):
            allitems.append(self.lbox.get(i))

        for i in sel:
            if i in allitems:
                if i not in temp:
                    sel.remove(i)

        for x in self.lbox.curselection():
            if self.lbox.get(x) not in sel:
                sel.append(self.lbox.get(x))

    def select(self):
        global sel
        s=', '.join(map(str,sel))
        self.cursel.set('Current Selection: '+s)

    # Create main GUI window
    def create_widgets(self):
        self.search_var = StringVar()
        self.search_var.trace("w", lambda name, index, mode: self.update_list())
        self.entry = Entry(self, textvariable=self.search_var, width=13)
        self.lbox = Listbox(self, selectmode=MULTIPLE,width=45, height=15)
        self.lbox.bind('<<ListboxSelect>>',self.CurSelet)

        self.entry.grid(row=0, column=0, padx=10, pady=3)
        self.lbox.grid(row=1, column=0, padx=10, pady=3)

        self.btn=Button(self,text='Okay', command=self.select, width=20)
        self.btn.grid(row=2,column=0, padx=10, pady=3)

        self.cursel=StringVar()
        self.lb1=Label(self,textvariable=self.cursel)
        self.lb1.grid(row=3,column=0,padx=10,pady=3)

        # Function for updating the list/doing the search.
        # It needs to be called here to populate the listbox.
        self.update_list()



    def update_list(self):
        global sel
        global l
        search_term = self.search_var.get()

        # Just a generic list to populate the listbox
        lbox_list = ['Adam', 'Lucy', 'Barry', 'Bob',
                     'James', 'Frank', 'Susan', 'Amanda', 'Christie']

        self.lbox.delete(0, END)

        for item in lbox_list:
                if search_term.lower() in item.lower():
                    self.lbox.insert(END, item)

        allitems=list()
        for i in range(self.lbox.size()):
            allitems.append(self.lbox.get(i))

        for i in sel:
            if i in allitems:
                self.lbox.select_set(self.lbox.get(0, "end").index(i))

root = Tk()
root.title('Filter Listbox Test')
Label(root, text='Search enabled').pack()
app = Application(master=root)
print('Starting mainloop()')
app.mainloop()

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