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我想根据用户选择的通配符为用户提供不同的默认文件名。

似乎pyface.FileDialog继承自HasTraits所以我应该在上面观察它的wildcard_index特征以注意到变化并更新default_filename特征。

这是我的版本,

import pyface, traits, traitsui
pyface.__version__, traits.__version__, traitsui.__version__
('6.1.2', '5.1.2', '6.1.3')

EDM python环境

import sys
sys.version
'2.7.15 |Enthought, Inc. (x86_64)| (default, Jun 21 2018, 22:10:16) [MSC v.1500 64 bit (AMD64)]'

使用 WX 后端

import wx
wx.version()
'3.0.2.0 msw (classic)'

这是最简单的演示。的问题,


from pyface.api import FileDialog
from traits.api import on_trait_change

class MyFileDialog(FileDialog):
    """ Subclass that allows the suggested file name to change based on the wildcard type.
    """

    @on_trait_change('wildcard_index')
    def on_wildcard_changed(self, idx):
        # This is never called
        self.default_filename = [
            'filename_john',
            'filename_paul',
            'filename_george',
            'filename_ringo'][idx]

if __name__ == '__main__':
    types = ["*.a", "*.b", "*.c", "*.d"]
    dialog = MyFileDialog(
        action="save as",
        wildcard="|".join(["%s|%s" % (t, t) for t in types]),
    )
    dialog.open()
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1 回答 1

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我建议您将此问题发布到 ets-users google 组(对于不熟悉它的观众,请访问:https ://groups.google.com/forum/#!forum/ets-users )。

于 2020-05-12T14:36:46.827 回答