如何将数据从Gtk对话框传递/返回到主应用程序类

时间:2019-01-07 14:46:50

标签: python python-3.x gtk gtk3 pygobject

我在Python Gtk中有一个应用程序。我的主文件中有我的主Application类。然后,我所有的对话框都放在不同的文件中。我需要能够将自定义数据从对话框传递/返回到标准Gtk响应代码以外的主应用程序类,这是一些基本示例代码,因为我自己的代码很长:

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

class DialogWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="Dialog Example")

        self.set_border_width(6)

        button = Gtk.Button("Open dialog")
        button.connect("clicked", self.on_button_clicked)

        self.add(button)

    def on_button_clicked(self, widget):
        dialog = DialogExample(self)
        response = dialog.run()

        if response == Gtk.ResponseType.OK:
            print("The OK button was clicked")
        elif response == Gtk.ResponseType.CANCEL:
            print("The Cancel button was clicked")

        dialog.destroy()

win = DialogWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()

对话框窗口位于单独的文件中:

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

class DialogExample(Gtk.Dialog):

    def __init__(self, parent):
        Gtk.Dialog.__init__(self, "My Dialog", parent, 0,
            (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
             Gtk.STOCK_OK, Gtk.ResponseType.OK))

        self.set_default_size(150, 100)

        label = Gtk.Label("This is a dialog to display additional information")

        box = self.get_content_area()
        box.add(label)
        self.show_all()

作为标准,我们将Gtk.ResponseType应用于按钮。但是,如果我们想返回一些自定义数据-不仅仅是简单的响应代码-作为进一步的代码示例,该怎么办:

class DialogExample(Gtk.Dialog):

    def __init__(self, parent):
        Gtk.Dialog.__init__(self, "My Dialog", parent, 0)

        self.set_default_size(150, 100)

        label = Gtk.Label("This is a dialog to display additional information")

        button = Gtk.Button("Return something")
        button.connect("clicked", self.on_button_clicked)

        box = self.get_content_area()
        box.add(label)
        self.show_all()

    def on_button_clicked(self, widget):
        if SOME_CONDITION:
            return <CUSTOM_RESPONSE>
        else:
            return <ALT_CUSTOM_RESPONSE>

当我做最后一个示例时,对话框不返回任何内容,我想做类似的事情:

class DialogWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="Dialog Example")

        self.set_border_width(6)

        button = Gtk.Button("Open dialog")
        button.connect("clicked", self.on_button_clicked)

        self.add(button)

    def on_button_clicked(self, widget):
        dialog = DialogExample(self)
        response = dialog.run()

        if response == <CUSTOM_RESPONSE>:
            #do something with <CUSTOM_RESPONSE>
        elif response == <ALT_CUSTOM_RESPONSE>:
            #do something different with <ALT_CUSTOM_RESPONSE>

        dialog.destroy()

win = DialogWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()

DialogExample窗口不会销毁/关闭并且什么也不会返回,并且应用程序基本上只是暂停,因为它认为没有更多的方法可以运行-尽管在返回自定义数据之后还有很多事情要做(我需要然后开始将记录添加到数据库中。

[更新]

我现在已经尝试了很多解决该问题的方法,因此无法在此处列出所有内容。我无休止地在寻找某种答案,似乎这不是互联网上任何人都能完成的事情。

1 个答案:

答案 0 :(得分:1)

gtk_dialog_run的C版本仅限于返回整数,您可以设置自定义值,但不能设置字符串或对象。您可以通过在“响应”信号上设置一个值来解决此问题,然后在运行函数返回后再获取它。

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

class DialogExample(Gtk.Dialog):

    def __init__(self, parent):
        Gtk.Dialog.__init__(self, "My Dialog", parent, 0,
            (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
             Gtk.STOCK_OK, Gtk.ResponseType.OK))

        self.result = ""
        self.set_default_size(150, 100)
        self.connect("response", self.on_response)

        label = Gtk.Label(label="Type something")
        self.entry = Gtk.Entry()

        box = self.get_content_area()
        box.add(label)
        box.add(self.entry)
        self.show_all()

    def on_response(self, widget, response_id):
        self.result = self.entry.get_text ()

    def get_result(self):
        return self.result

class DialogWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="Dialog Example")
        self.set_border_width(6)

        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6)
        self.add(box)

        button = Gtk.Button(label="Open dialog")
        button.connect("clicked", self.on_button_clicked)
        box.add(button)

        self.label = Gtk.Label()
        box.add(self.label)

    def on_button_clicked(self, widget):
        dialog = DialogExample(self)
        response = dialog.run()

        if response == Gtk.ResponseType.OK:
            self.label.set_text(dialog.get_result())
            print("The OK button was clicked")
        elif response == Gtk.ResponseType.CANCEL:
            print("The Cancel button was clicked")

        dialog.destroy()

win = DialogWindow()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()