Python Listbox.column_index方法代码示例

# 需要导入模块: from tkinter import Listbox [as 别名]
# 或者: from tkinter.Listbox import column_index [as 别名]
    def __init__(self, master, columns, column_weights=None, cnf={}, **kw):
        """
        Construct a new multi-column listbox widget.

        :param master: The widget that should contain the new
            multi-column listbox.

        :param columns: Specifies what columns should be included in
            the new multi-column listbox.  If ``columns`` is an integer,
            the it is the number of columns to include.  If it is
            a list, then its length indicates the number of columns
            to include; and each element of the list will be used as
            a label for the corresponding column.

        :param cnf, kw: Configuration parameters for this widget.
            Use ``label_*`` to configure all labels; and ``listbox_*``
            to configure all listboxes.  E.g.:

                >>> mlb = MultiListbox(master, 5, label_foreground='red')
        """
        # If columns was specified as an int, convert it to a list.
        if isinstance(columns, int):
            columns = list(range(columns))
            include_labels = False
        else:
            include_labels = True

        if len(columns) == 0:
            raise ValueError("Expected at least one column")

        # Instance variables
        self._column_names = tuple(columns)
        self._listboxes = []
        self._labels = []

        # Pick a default value for column_weights, if none was specified.
        if column_weights is None:
            column_weights = [1] * len(columns)
        elif len(column_weights) != len(columns):
            raise ValueError('Expected one column_weight for each column')
        self._column_weights = column_weights

        # Configure our widgets.
        Frame.__init__(self, master, **self.FRAME_CONFIG)
        self.grid_rowconfigure(1, weight=1)
        for i, label in enumerate(self._column_names):
            self.grid_columnconfigure(i, weight=column_weights[i])

            # Create a label for the column
            if include_labels:
                l = Label(self, text=label, **self.LABEL_CONFIG)
                self._labels.append(l)
                l.grid(column=i, row=0, sticky='news', padx=0, pady=0)
                l.column_index = i

            # Create a listbox for the column
            lb = Listbox(self, **self.LISTBOX_CONFIG)
            self._listboxes.append(lb)
            lb.grid(column=i, row=1, sticky='news', padx=0, pady=0)
            lb.column_index = i

            # Clicking or dragging selects:
            lb.bind('<Button-1>', self._select)
            lb.bind('<B1-Motion>', self._select)
            # Scroll whell scrolls:
            lb.bind('<Button-4>', lambda e: self._scroll(-1))
            lb.bind('<Button-5>', lambda e: self._scroll(+1))
            lb.bind('<MouseWheel>', lambda e: self._scroll(e.delta))
            # Button 2 can be used to scan:
            lb.bind('<Button-2>', lambda e: self.scan_mark(e.x, e.y))
            lb.bind('<B2-Motion>', lambda e: self.scan_dragto(e.x, e.y))
            # Dragging outside the window has no effect (diable
            # the default listbox behavior, which scrolls):
            lb.bind('<B1-Leave>', lambda e: 'break')
            # Columns can be resized by dragging them:
            l.bind('<Button-1>', self._resize_column)

        # Columns can be resized by dragging them.  (This binding is
        # used if they click on the grid between columns:)
        self.bind('<Button-1>', self._resize_column)

        # Set up key bindings for the widget:
        self.bind('<Up>', lambda e: self.select(delta=-1))
        self.bind('<Down>', lambda e: self.select(delta=1))
        self.bind('<Prior>', lambda e: self.select(delta=-self._pagesize()))
        self.bind('<Next>', lambda e: self.select(delta=self._pagesize()))

        # Configuration customizations
        self.configure(cnf, **kw)