如何使用Python中的复选框创建树视图

我一直在用Tkinter和Tix写一个小程序.我正处于需要带有复选框(检查按钮)的树视图的位置,因此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(),它看起来很容易得到树视图,但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非常感激.

我不仅限于ttk.什么都行; 只要我有一个示例或好的文档,我就可以使它工作

1> Brandon..：

---

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()

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有没有一种方法可以在不使用Tix和Tkinter的情况下创建它？

---

@JamestheGreat据我所知[Tix](https://docs.python.org/2/library/tix.html)是在Python2.7标准库中.

---

有可能以某种方式让ttk使复选框看起来像原生的吗？

2> j_4321..：

---

我创建了一个treeview类,其复选框继承了ttk.Treeview,但复选框不是ttk.Checkbutton,而是checked,unchecked和tristate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("", 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模块中CheckboxTreeview提供了改进版本.