无法在python中更改树视图的背景颜色 [英] Unable to change background color of treeview in python

问题描述

我正在尝试使用标签更改树视图中行的背景颜色，但无法成功.以下是我的代码:

I am trying to change the background color of the rows in treeview using tags but unable to get the success. Following is my code:

def display_device_status(self, colnames):
    # root = Tk()
    # self.root.title('Device Status')
    # self.root.resizable(width=FALSE, height=FALSE)
    # tree = ttk.Treeview(self.root, height=25, column=("col1", "col2"), show="headings", selectmode="browse")
    # tree.heading('#1', text='MAC')
    # tree.column('#1',width=290)
    # tree.heading('#2', text='Status')
    # tree.column('#2',width=290)
    tree = ttk.Treeview(self.root, height=25, column=colnames, show="headings", selectmode="browse")
    # tree.option_add()
    for eachcol in colnames:
        tree.heading(column=eachcol, text=eachcol)
        tree.column(column=eachcol, width=290, minwidth=0)
    vsb = ttk.Scrollbar(self.root, orient="vertical")
    vsb.configure(command=tree.yview)
    tree.configure(yscrollcommand=vsb.set)
    tree.pack(side="left")
    vsb.pack(side="right", fill="y")
    # viewing_records(tree)
    records = tree.get_children()
    for element in records:
        tree.delete(element)
    conn = sqlite3.connect('Gateway_Log.db')
    cursor = conn.cursor()
    query_result = cursor.execute("SELECT * FROM Status")
    for row in query_result:
        if row[1] == 1:
            tree.insert("", 'end', values=(row[0], 'Online'), tags = ('123',))
        else:
            tree.insert("", 'end', values=(row[0], 'Offline'), tags=('456',))
    tree.tag_configure('123', background='orange')
    tree.tag_configure('456', background='purple')
    cursor.close()
    conn.close()

每次运行此代码时，我只能看到背景颜色.

when I run this code every time I am able to see background color as while only.

请帮我更改行的背景颜色.

Please help me to change the background color of row.

推荐答案

您正在以正确的方式更改行的颜色，但当前 Tcl 中的树视图存在错误:https://core.tcl-lang.org/tk/tktview?name=509cafafae 所以行颜色设置来自标签的被样式设置的树视图背景颜色覆盖.

You are changing the color of the rows the right way, but there is currently a bug with treeviews in Tcl: https://core.tcl-lang.org/tk/tktview?name=509cafafae so the row color set from the tag is overridden by the treeview background color set by the style.

在等待 tcl/tk 的修复版本期间，您可以使用 bug 票中建议的修复:

While waiting for the fixed version of tcl/tk, you can use the fix suggested in the bug ticket:

style = ttk.Style()

def fixed_map(option):
    # Returns the style map for 'option' with any styles starting with
    # ("!disabled", "!selected", ...) filtered out

    # style.map() returns an empty list for missing options, so this should
    # be future-safe
    return [elm for elm in style.map("Treeview", query_opt=option)
            if elm[:2] != ("!disabled", "!selected")]

style.map("Treeview",
          foreground=fixed_map("foreground"),
          background=fixed_map("background"))

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