Tkinter在Treeview小部件中插入一个Combobox

Question

例如,让我们使用类创建一个Treeview小部件,如下所示:

class FiltersTree:
    def __init__(self, master, filters):
        self.master = master
        self.filters = filters
        self.treeFrame = Frame(self.master)
        self.treeFrame.pack()
        self._create_treeview()
        self._populate_root()

    def _create_treeview(self):
        self.dataCols = ['filter', 'attribute']
        self.tree = ttk.Treeview(self.master, columns = self.dataCols, displaycolumns = '#all')

填充root,像往常一样插入子项.在代码块的末尾,您可以使用Combo对象查看我想在树中放置Combobox的位置:

    def _populate_root(self):
        # a Filter object
        for filter in self.filters:
            top_node = self.tree.insert('', 'end', text=filter.name)

            # a Field object
            for field in filter.fields:
                mid_node = self.tree.insert(top_node, 'end', text = field.name)

                # insert field attributes
                self.insert_children(mid_node, field)

    def insert_children(self, parent, field):
        name = self.tree.insert(parent, 'end', text = 'Field name:',
                         values = [field.name])
        self.tree.insert(parent, 'end', text = 'Velocity: ', 
                         values = [Combo(self)]) # <--- Combo object
        ...

接下来是Combo的类定义.我理解它的方式,组合框小部件继承自并且必须放在来自ttk的Labelframe小部件中:

class Combo(ttk.Frame):
    def __init__(self, master):
        self.opts = ('opt1', 'opt2', 'etc')
        self.comboFrame = ttk.Labelframe(master, text = 'Choose option')
        self.comboFrame.pack()
        self.combo = ttk.Combobox(comboFrame, values=self.opts, state='readonly')
        self.combo.current(1)
        self.combo.pack()

这完全错了吗？我希望能够在Treeview小部件中更改单位之间(例如m/s,ft/s等).

有什么建议吗,PLZ？

Answer 1

treeview小部件不支持嵌入式小部件.values属性的值被视为字符串.