多窗口错误Glade、Gtk和Python

Question

我正在做一个界面，你必须登录才能进入。所以在登录窗口，我放了一个按钮来打开一个模式窗口（about dialog）。它工作得很好，但是只有一次，我的意思是：这个窗口可以打开和关闭，但是如果你再试一次，它就失败了。我不知道为什么，我是个乞丐。空地代码是：

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.16.1 -->
<interface>
  <requires lib="gtk+" version="3.10"/>
 <object class="GtkAboutDialog" id="aboutwin">
<property name="can_focus">False</property>
<property name="resizable">False</property>
<property name="modal">True</property>
<property name="window_position">center</property>
<property name="destroy_with_parent">True</property>
<property name="type_hint">dialog</property>
<property name="has_resize_grip">False</property>
<property name="program_name">Movies App</property>
<property name="version">Version: 0.1</property>
<property name="authors">Markos Horro Varela
Breixo Camiña Fernández</property>
<property name="documenters">Markos Horro Varela
Breixo Camiña Fernández</property>
<property name="translator_credits" translatable="yes">Markos Horro Varela
Breixo Camiña Fernández</property>
<property name="artists">Markos Horro Varela
Breixo Camiña Fernández</property>
<property name="logo_icon_name">video-x-generic</property>
<property name="license_type">gpl-3-0</property>
<signal name="close" handler="onDeleteWindow" swapped="no"/>
<signal name="delete-event" handler="onDeleteWindow" swapped="no"/>
<child internal-child="vbox">
  <object class="GtkBox" id="about">
    <property name="can_focus">False</property>
    <property name="orientation">vertical</property>
    <property name="spacing">2</property>
    <child internal-child="action_area">
      <object class="GtkButtonBox" id="aboutdialog-action_area1">
        <property name="can_focus">False</property>
        <property name="layout_style">end</property>
        <signal name="delete-event" handler="onDeleteWindow" swapped="no"/>
      </object>
      <packing>
        <property name="expand">False</property>
        <property name="fill">True</property>
        <property name="pack_type">end</property>
        <property name="position">0</property>
      </packing>
    </child>
  </object>
</child>
</object>
<object class="GtkWindow" id="signinwin">
<property name="can_focus">False</property>
<property name="title" translatable="yes">Movie App</property>
<property name="resizable">False</property>
<property name="window_position">center</property>
<property name="has_resize_grip">False</property>
<signal name="delete-event" handler="onDeleteWindow" swapped="no"/>
<child>
  <object class="GtkGrid" id="grid1">
    <property name="visible">True</property>
    <property name="can_focus">False</property>
    <property name="margin_left">10</property>
    <property name="margin_right">60</property>
    <property name="margin_top">10</property>
    <property name="margin_bottom">10</property>
    <child>
      <object class="GtkEntry" id="login">
        <property name="visible">True</property>
        <property name="can_focus">True</property>
        <property name="margin_right">10</property>
        <property name="margin_bottom">5</property>
        <property name="input_purpose">name</property>
      </object>
      <packing>
        <property name="left_attach">2</property>
        <property name="top_attach">1</property>
        <property name="width">1</property>
        <property name="height">1</property>
      </packing>
    </child>
    <child>
      <object class="GtkEntry" id="pass">
        <property name="visible">True</property>
        <property name="can_focus">True</property>
        <property name="margin_right">10</property>
        <property name="margin_top">5</property>
        <property name="margin_bottom">5</property>
        <property name="placeholder_text" translatable="yes">************</property>
        <property name="input_purpose">password</property>
      </object>
      <packing>
        <property name="left_attach">2</property>
        <property name="top_attach">2</property>
        <property name="width">1</property>
        <property name="height">1</property>
      </packing>
    </child>
    <child>
      <object class="GtkLabel" id="userlabel">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="margin_right">6</property>
        <property name="label" translatable="yes">User</property>
      </object>
      <packing>
        <property name="left_attach">1</property>
        <property name="top_attach">1</property>
        <property name="width">1</property>
        <property name="height">1</property>
      </packing>
    </child>
    <child>
      <object class="GtkLabel" id="passlabel">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="margin_right">6</property>
        <property name="label" translatable="yes">Password</property>
      </object>
      <packing>
        <property name="left_attach">1</property>
        <property name="top_attach">2</property>
        <property name="width">1</property>
        <property name="height">1</property>
      </packing>
    </child>
    <child>
      <object class="GtkButton" id="button1">
        <property name="label" translatable="yes">Sign in</property>
        <property name="visible">True</property>
        <property name="can_focus">True</property>
        <property name="receives_default">True</property>
        <property name="margin_left">20</property>
        <property name="margin_right">20</property>
      </object>
      <packing>
        <property name="left_attach">2</property>
        <property name="top_attach">3</property>
        <property name="width">1</property>
        <property name="height">1</property>
      </packing>
    </child>
    <child>
      <object class="GtkLabel" id="title">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="margin_left">5</property>
        <property name="margin_right">5</property>
        <property name="margin_top">5</property>
        <property name="margin_bottom">5</property>
        <property name="label" translatable="yes">Movie App</property>
      </object>
      <packing>
        <property name="left_attach">2</property>
        <property name="top_attach">0</property>
        <property name="width">1</property>
        <property name="height">1</property>
      </packing>
    </child>
    <child>
      <object class="GtkGrid" id="grid2">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <child>
          <object class="GtkButton" id="policy">
            <property name="label" translatable="yes">Policy</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <property name="margin_left">30</property>
            <property name="margin_right">5</property>
            <property name="margin_top">30</property>
            <property name="margin_bottom">5</property>
          </object>
          <packing>
            <property name="left_attach">0</property>
            <property name="top_attach">0</property>
            <property name="width">1</property>
            <property name="height">1</property>
          </packing>
        </child>
        <child>
          <object class="GtkButton" id="aboutus">
            <property name="label" translatable="yes">About</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <property name="margin_left">5</property>
            <property name="margin_right">30</property>
            <property name="margin_top">30</property>
            <property name="margin_bottom">5</property>
            <signal name="clicked" handler="onAboutPressed" swapped="no"/>
          </object>
          <packing>
            <property name="left_attach">1</property>
            <property name="top_attach">0</property>
            <property name="width">1</property>
            <property name="height">1</property>
          </packing>
        </child>
      </object>
      <packing>
        <property name="left_attach">2</property>
        <property name="top_attach">4</property>
        <property name="width">1</property>
        <property name="height">1</property>
      </packing>
    </child>
    <child>
      <placeholder/>
    </child>
    <child>
      <placeholder/>
    </child>
    <child>
      <placeholder/>
    </child>
    <child>
      <placeholder/>
    </child>
    <child>
      <placeholder/>
    </child>
    <child>
      <placeholder/>
    </child>
    <child>
      <placeholder/>
    </child>
    <child>
      <placeholder/>
    </child>
  </object>
</child>
</object>
</interface>

我的python代码是：

^{pr2}$

Answer 1

我不能告诉你确切的错误是什么，但可能是你在格拉德分配了错误的信号。我将close事件从GtkDialog>；close切换到GtkDialog>；response。也许只有在你需要的时候才得到AboutDialog会更好，所以我把它放到了它自己的类中。我也是初学者，但代码现在应该可以工作了：

#!/usr/bin/python

from gi.repository import Gtk

class AboutDialog:
    def __init__(self):
        self.builder = Gtk.Builder()
        self.builder.add_objects_from_file("v0.glade", ("aboutwin", ""))
        self.ab = self.builder.get_object("aboutwin")
        self.builder.connect_signals(self)

    def on_aboutdialog_response(self, widget, signal):
        print("About close with button or (x)")
        self.ab.hide()

    def run(self):
        self.ab.run()

class MainHandler(Gtk.Window):
    def on_delete_window(self, widget, signal):
        print("Main window closed")
        Gtk.main_quit()

    def on_about_pressed(self, button):
        print("Run About Dialog")
        about = AboutDialog()
        about.run()

def main():
    builder = Gtk.Builder()
    builder.add_objects_from_file("v0.glade", ("signinwin", "") )
    builder.connect_signals(MainHandler())

    main = builder.get_object("signinwin")
    main.show_all()

    Gtk.main()

if __name__ == "__main__":
      main()

^{pr2}$