Python GTK + 3只提取文件选择器对话框？

Question

我正在尝试创建一个使用Gtk FileChooserDialog对话框的程序.我按照这里的教程,它的工作原理.不过,我想只是有对话框弹出,而不必处理实际的Gtk窗口.

我已经尝试了在教程中使用的代码,在on_file_clicked()函数中将它放入__init__函数中(并稍微调整它以使它看起来像它可以工作)在删除已经存在的代码之后__init__:

class FileChooserWindow(Gtk.Window):

    def __init__(self):
        global path

        dialog = Gtk.FileChooserDialog("Please choose a file", self,
            Gtk.FileChooserAction.OPEN,
            (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
             Gtk.STOCK_OPEN, Gtk.ResponseType.OK))

        self.add_filters(dialog)

        response = dialog.run()
        if response == Gtk.ResponseType.OK:
            print("Open clicked")
            print("File selected: " + dialog.get_filename())
            path = dialog.get_filename()
            dialog.destroy()
        elif response == Gtk.ResponseType.CANCEL:
            print("Cancel clicked")
            dialog.destroy()

    def add_filters(self, dialog):
        filter_any = Gtk.FileFilter()
        filter_any.set_name("Any files")
        filter_any.add_pattern("*")
        dialog.add_filter(filter_any)

        filter_text = Gtk.FileFilter()
        filter_text.set_name('Text files')
        filter_text.add_mime_type('text/plain')
        dialog.add_filter(filter_text)

        filter_py = Gtk.FileFilter()
        filter_py.set_name('Python files')
        filter_py.add_mime_type('text/x-python')
        dialog.add_filter(filter_py)

        filter_img = Gtk.FileFilter()
        filter_img.set_name('Image')
        filter_img.add_mime_type('image/*')
        dialog.add_filter(filter_img)

win = FileChooserWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()

但它只是返回此错误:

Traceback (most recent call last):
  File "base.py", line 152, in <module>
    win = FileChooserWindow()
  File "base.py", line 38, in __init__
    Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/Gtk.py", line 500, in __init__
    self._init(*args, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 175, in new_init
    return super_init_func(self, **new_kwargs)
TypeError: could not convert value for property `transient_for' from FileChooserWindow to GtkWindow

有没有人知道只提取Gtk FileChooserDialog对话框的正确方法？

Answer 1

在第6行声明对话框时:

dialog = Gtk.FileChooserDialog("Please choose a file", self,  

self是对话框的父级.要创建没有父级设置的对话框,请执行以下操作None:

dialog = Gtk.FileChooserDialog("Please choose a file", None,