将变量传递给对话框

Question

我需要将消息传递到错误对话框，以显示给用户。

第一次尝试

PreferencesDialog.py

dlgError = ErrorDialog ('Have you been messing with the configuration files?')
dlgError.run ()

ErrorDialog.py

global message = None
def __new__(cls, msg):
    builder = get_builder('ErrorDialog')
    new_object = builder.get_object('error_dialog')
    new_object.finish_initializing(builder)
    global message
    message = msg
    return new_object
def finish_initializing(self, builder):
    # Get a reference to the builder and set up the signals.
    self.builder = builder
    self.ui = builder.get_ui(self)
    global message
    self.builder.get_object ('lblMessage').set_text (message)

第二次尝试

PreferencesDialog.py

dlgError = ErrorDialog ()
dlgError.message = 'Have you been messing with the configuration files?'
dlgError.run ()

ErrorDialog.py

global message = None
def __new__(cls):
    builder = get_builder('ErrorDialog')
    new_object = builder.get_object('error_dialog')
    new_object.finish_initializing(builder)
    return new_object
def finish_initializing(self, builder):
    # Get a reference to the builder and set up the signals.
    self.builder = builder
    self.ui = builder.get_ui(self)
    global message
    self.builder.get_object ('lblMessage').set_text (message)

两者都会引发相同的异常;

self.builder.get_object ('lblMessage').set_text (message)
NameError: global name 'message' is not defined

请协助。我正在使用Quick，GTK 3和Python 2.7。

Answer 1

为什么不通过在 __init__ 中设置message来使其成为类实例的成员？

def __init__(self, msg):
  self._message = msg
def finish_initializing(self, builder):
  self.builder.get_object("lblMessage").set_text(self._message)

Answer 2

我设置了一个对话框，在其中我向对话框传递了一个变量，以将文本放入输入框中。 技巧是将变量传递到 new 中，然后在调用 finish.initializing（） 时将其放入其中。 代码如下：

class QuerynameDialog(Gtk.Dialog):
    __gtype_name__ = "QuerynameDialog"
    def __new__(cls, name):
        """Special static method that's automatically called by Python when 
        constructing a new instance of this class.
        Returns a fully instantiated QuerynameDialog object.
        """
        builder = get_builder('QuerynameDialog')
        new_object = builder.get_object('queryname_dialog')
        new_object.finish_initializing(builder,name)
        return new_object

    def finish_initializing(self, builder,name):
        """Called when we're finished initializing.
        finish_initalizing should be called after parsing the ui definition
        and creating a QuerynameDialog object with it in order to
        finish initializing the start of the new QuerynameDialog
        instance.
        """
        # Get a reference to the builder and set up the signals.
        self.builder = builder
        self.ui = builder.get_ui(self)
        self.builder.get_object('name_entry').set_text(name)