python - 如何在 Python 中创建带有复选框的树视图

Question

我一直在使用 Tkinter 和 Tix 编写一个小程序。我现在需要一个带有复选框（复选按钮）的树视图，以便我可以从树视图中选择项目。是否有捷径可寻？我一直在看 ttk.Treeview () ，它看起来很容易获得树视图，但是有没有办法在视图中插入一个检查按钮？

一个简单的代码片段将不胜感激。

我不限于ttk。什么都行；只要我有一个例子或好的文档，我就可以让它工作

Answer 1

import Tix

class View(object):
    def __init__(self, root):
        self.root = root
        self.makeCheckList()

    def makeCheckList(self):
        self.cl = Tix.CheckList(self.root, browsecmd=self.selectItem)
        self.cl.pack()
        self.cl.hlist.add("CL1", text="checklist1")
        self.cl.hlist.add("CL1.Item1", text="subitem1")
        self.cl.hlist.add("CL2", text="checklist2")
        self.cl.hlist.add("CL2.Item1", text="subitem1")
        self.cl.setstatus("CL2", "on")
        self.cl.setstatus("CL2.Item1", "on")
        self.cl.setstatus("CL1", "off")
        self.cl.setstatus("CL1.Item1", "off")
        self.cl.autosetmode()

    def selectItem(self, item):
        print item, self.cl.getstatus(item)

def main():
    root = Tix.Tk()
    view = View(root)
    root.update()
    root.mainloop()

if __name__ == '__main__':
    main()

Answer 2

我用继承 ttk.Treeview 的复选框创建了一个树视图类，但复选框不是 ttk.Checkbutton 而是选中、未选中和三态复选框的图像。

import tkinter as tk
import tkinter.ttk as ttk

class CheckboxTreeview(ttk.Treeview):
    """
        Treeview widget with checkboxes left of each item.
        The checkboxes are done via the image attribute of the item, so to keep
        the checkbox, you cannot add an image to the item.
    """

    def __init__(self, master=None, **kw):
        ttk.Treeview.__init__(self, master, **kw)
        # checkboxes are implemented with pictures
        self.im_checked = tk.PhotoImage(file='checked.png')
        self.im_unchecked = tk.PhotoImage(file='unchecked.png')
        self.im_tristate = tk.PhotoImage(file='tristate.png')
        self.tag_configure("unchecked", image=self.im_unchecked)
        self.tag_configure("tristate", image=self.im_tristate)
        self.tag_configure("checked", image=self.im_checked)
        # check / uncheck boxes on click
        self.bind("<Button-1>", self.box_click, True)

    def insert(self, parent, index, iid=None, **kw):
        """ same method as for standard treeview but add the tag 'unchecked'
            automatically if no tag among ('checked', 'unchecked', 'tristate')
            is given """
        if not "tags" in kw:
            kw["tags"] = ("unchecked",)
        elif not ("unchecked" in kw["tags"] or "checked" in kw["tags"]
                  or "tristate" in kw["tags"]):
            kw["tags"] = ("unchecked",)
        ttk.Treeview.insert(self, parent, index, iid, **kw)

    def check_descendant(self, item):
        """ check the boxes of item's descendants """
        children = self.get_children(item)
        for iid in children:
            self.item(iid, tags=("checked",))
            self.check_descendant(iid)

    def check_ancestor(self, item):
        """ check the box of item and change the state of the boxes of item's
            ancestors accordingly """
        self.item(item, tags=("checked",))
        parent = self.parent(item)
        if parent:
            children = self.get_children(parent)
            b = ["checked" in self.item(c, "tags") for c in children]
            if False in b:
                # at least one box is not checked and item's box is checked
                self.tristate_parent(parent)
            else:
                # all boxes of the children are checked
                self.check_ancestor(parent)

    def tristate_parent(self, item):
        """ put the box of item in tristate and change the state of the boxes of
            item's ancestors accordingly """
        self.item(item, tags=("tristate",))
        parent = self.parent(item)
        if parent:
            self.tristate_parent(parent)

    def uncheck_descendant(self, item):
        """ uncheck the boxes of item's descendant """
        children = self.get_children(item)
        for iid in children:
            self.item(iid, tags=("unchecked",))
            self.uncheck_descendant(iid)

    def uncheck_ancestor(self, item):
        """ uncheck the box of item and change the state of the boxes of item's
            ancestors accordingly """
        self.item(item, tags=("unchecked",))
        parent = self.parent(item)
        if parent:
            children = self.get_children(parent)
            b = ["unchecked" in self.item(c, "tags") for c in children]
            if False in b:
                # at least one box is checked and item's box is unchecked
                self.tristate_parent(parent)
            else:
                # no box is checked
                self.uncheck_ancestor(parent)

    def box_click(self, event):
        """ check or uncheck box when clicked """
        x, y, widget = event.x, event.y, event.widget
        elem = widget.identify("element", x, y)
        if "image" in elem:
            # a box was clicked
            item = self.identify_row(y)
            tags = self.item(item, "tags")
            if ("unchecked" in tags) or ("tristate" in tags):
                self.check_ancestor(item)
                self.check_descendant(item)
            else:
                self.uncheck_descendant(item)
                self.uncheck_ancestor(item)



if __name__ == '__main__':
    root = tk.Tk()
    t = CheckboxTreeview(root, show="tree")
    t.pack()
    t.insert("", 0, "1", text="1")
    t.insert("1", "end", "11", text="1")
    t.insert("1", "end", "12", text="2")
    t.insert("12", "end", "121", text="1")
    t.insert("12", "end", "122", text="2")
    t.insert("122", "end", "1221", text="1")
    t.insert("1", "end", "13", text="3")
    t.insert("13", "end", "131", text="1")
    root.mainloop()

ttkwidgets模块CheckboxTreeview中提供了一个改进的版本。

Answer 3