修改 Python Tkinter 中的默认字体 [英] Modify the default font in Python Tkinter

问题描述

我正在使用 Tkinter 使用 Python2.7 开发 GUI，但我遇到了一个烦人的问题.

I'm working on a GUI in Python2.7, with Tkinter, and I have an annoying problem.

如果可能，我想在一行中定义所有小部件使用的默认字体.此行仅修改 Entry 或 ComboBox 中使用的字体:

I would like to define the default font used by all the widgets, if possible in one line. This line modify only the font used in Entry, or ComboBox:

root.option_add("*Font", "courier 10")

但不是示例复选框的标签.

but not the label of checkbox by example.

我发现存在预定义字体TkDefaultFont"，但我无法更改其配置:

I found that a predefined font exist "TkDefaultFont" but I'm unable to change its configuration:

print tkFont.Font(font='TkDefaultFont').configure()
tkFont.Font(font='TkDefaultFont').config(family='Helvetica', size=20)
tk.TkDefaultFont = tkFont.Font(family="Helvetica",size=36,weight="bold")
print tkFont.Font(font='TkDefaultFont').configure()

返回:

{'family': 'DejaVu Sans', 'weight': 'normal', 'slant': 'roman', 'overstrike': 0, 'underline': 0, 'size': -12}{'family': 'DejaVu Sans', 'weight': 'normal', 'slant': 'roman', 'overstrike': 0, 'underline': 0, 'size': -12}

{'family': 'DejaVu Sans', 'weight': 'normal', 'slant': 'roman', 'overstrike': 0, 'underline': 0, 'size': -12} {'family': 'DejaVu Sans', 'weight': 'normal', 'slant': 'roman', 'overstrike': 0, 'underline': 0, 'size': -12}

(没有错误，但没有任何变化！！)

(no errors, but nothing change !!)

我做错了什么?

推荐答案

Tkinter 有几种内置字体——TkDefaultFont、TkTextFont、TkFixedFont等.这些都是所谓的命名字体".它们非常强大——改变其中之一，所有使用它们的小部件也会改变.

Tkinter has several built-in fonts -- TkDefaultFont, TkTextFont, TkFixedFont, etc. These are all what are called "named fonts". They are remarkably powerful -- change one of these and all widgets that use them will change as well.

要更改其中一种字体，请获取它的句柄，然后使用 configure 方法进行更改.例如，要将 TkDefaultFont 的大小更改为 48，您可以这样做:

To change one of these fonts, get a handle to it and then use the configure method to change. For example, to change the size of TkDefaultFont to 48 you would do this:

default_font = tkFont.nametofont("TkDefaultFont")
default_font.configure(size=48)

就是这样.您无需执行任何其他操作 - 使用 TkDefaultFont 的所有内容都会立即注意到更改.

That's it. You don't have to do anything else -- everything that uses TkDefaultFont will instantly notice the change.

在您的问题中，您暗示您希望所有内容都使用 TkDefaultFont 字体.为此，您可以使用 option_add 如您所示:

In your question you imply you want TkDefaultFont font to be used by everything. To do that you can use option_add as you've shown:

root.option_add("*Font", default_font)

但是请注意，option_add 仅影响在您调用 option_add 之后 创建的小部件，因此您需要在创建任何其他小部件.

Note, however, that option_add only affects widgets created after you've called option_add, so you need to do it before creating any other widgets.

另请注意，如果您不想首先获取字体实例，您可以将字体名称指定给 option_add(即:root.option_add("*Font","TkDefaultFont")).

Also note that you can give the font name to option_add if you don't want to bother with getting the font instance first (ie: root.option_add("*Font", "TkDefaultFont")).

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