python - 如何使用python代码修改用glade创建的GUI

Question

我刚刚开始用python学习Glade，我创建了一个简单的glade文件，我添加了几个按钮，我还添加了一个添加按钮，我希望添加按钮向“mainBox”对象添加一个新按钮，即“window1”的子级，我正在使用下面给出的 python 代码，但它不起作用，因为它只打印完成但不向 GUI 添加任何按钮，我做错了什么？谢谢

  <?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.22.1 -->
<interface>
  <requires lib="gtk+" version="3.20"/>
  <object class="GtkWindow" id="window1">
    <property name="can_focus">False</property>
    <property name="default_width">800</property>
    <property name="default_height">800</property>
    <signal name="destroy" handler="on_destroy_clicked" swapped="no"/>
    <child>
      <placeholder/>
    </child>
    <child>
      <object class="GtkBox">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="orientation">vertical</property>
        <child>
          <object class="GtkToolbar" id="toolbar">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <child>
              <object class="GtkMenuToolButton">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="is_important">True</property>
                <property name="label" translatable="yes">Back</property>
                <property name="use_underline">True</property>
                <property name="stock_id">gtk-go-back</property>
                <signal name="show-menu" handler="on_back_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkMenuToolButton">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="is_important">True</property>
                <property name="label" translatable="yes">Forward</property>
                <property name="use_underline">True</property>
                <property name="stock_id">gtk-sort-descending</property>
                <signal name="show-menu" handler="on_forward_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkSeparatorToolItem">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="tooltip_text" translatable="yes">&lt;separator&gt;</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkToolButton">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="tooltip_text" translatable="yes">Refresh</property>
                <property name="is_important">True</property>
                <property name="label" translatable="yes">Refresh</property>
                <property name="use_underline">True</property>
                <property name="stock_id">gtk-convert</property>
                <signal name="clicked" handler="on_refresh_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkToolButton">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="tooltip_text" translatable="yes">Home</property>
                <property name="is_important">True</property>
                <property name="label" translatable="yes">Home</property>
                <property name="use_underline">True</property>
                <property name="stock_id">gtk-disconnect</property>
                <signal name="clicked" handler="on_home_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkToolButton">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="is_important">True</property>
                <property name="label" translatable="yes">Add</property>
                <property name="use_underline">True</property>
                <property name="stock_id">gtk-add</property>
                <signal name="clicked" handler="on_add_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkSeparatorToolItem">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkToolButton">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="tooltip_text" translatable="yes">Delete</property>
                <property name="is_important">True</property>
                <property name="label" translatable="yes">Delete</property>
                <property name="use_underline">True</property>
                <property name="stock_id">gtk-dialog-error</property>
                <signal name="clicked" handler="on_delete_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
            <child>
              <object class="GtkToolButton">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="is_important">True</property>
                <property name="label" translatable="yes">Information</property>
                <property name="use_underline">True</property>
                <property name="stock_id">gtk-justify-fill</property>
                <signal name="clicked" handler="on_information_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="homogeneous">True</property>
              </packing>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkBox">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="margin_bottom">1</property>
            <property name="spacing">2</property>
            <child>
              <object class="GtkLabel">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">Current Location</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">0</property>
              </packing>
            </child>
            <child>
              <object class="GtkEntry">
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="margin_right">1</property>
                <property name="input_purpose">url</property>
              </object>
              <packing>
                <property name="expand">True</property>
                <property name="fill">True</property>
                <property name="position">1</property>
              </packing>
            </child>
            <child>
              <object class="GtkImage">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="stock">gtk-execute</property>
                <property name="icon_size">3</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">2</property>
              </packing>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
        <child>
          <object class="GtkBox" id="boxMain">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="homogeneous">True</property>
            <child>
              <object class="GtkButton">
                <property name="label" translatable="yes">button1</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">0</property>
              </packing>
            </child>
            <child>
              <object class="GtkButton">
                <property name="label" translatable="yes">button2</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">1</property>
              </packing>
            </child>
            <child>
              <placeholder/>
            </child>
            <child>
              <placeholder/>
            </child>
          </object>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">2</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>

所以，我想要使用添加按钮做的事情是在 boxMain 对象中创建另一个按钮，所以我尝试了这段代码

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

builder = Gtk.Builder()
builder.add_from_file("test.glade")
box = builder.get_object("boxMain")


class Handler:
    def on_back_clicked(self, button):
        pass
    def on_destroy_clicked(self, button):
        Gtk.main_quit()
    def on_forward_clicked(self, button):
        pass
    def on_refresh_clicked(self, button):
        pass
    def on_home_clicked(self, button):
        pass
    def on_information_clicked(self, button):
        pass
    def on_delete_clicked(self, button):
        pass
    def on_add_clicked(self, button):
        button1 = Gtk.Button()
        button1.set_label("Button")
        box.pack_start(button1,True,True,0)
        print("done")


builder.connect_signals(Handler())
window = builder.get_object("window1")

window.show_all()

Gtk.main()

但是这段代码只是打印完成，没有向 GUI 添加任何按钮，有人可以帮忙吗？谢谢

Answer 1

您没有使用 button1.show() 显示按钮。

顺便说一句，编写代码的更好方法是:

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




class GUI:
    def __init__ (self):

        self.builder = Gtk.Builder()
        self.builder.add_from_file("test.glade")
        self.builder.connect_signals(self)
        window = self.builder.get_object("window1")
        window.show_all()

    def on_back_clicked(self, button):
        pass
    def on_destroy_clicked(self, button):
        Gtk.main_quit()
    def on_forward_clicked(self, button):
        pass
    def on_refresh_clicked(self, button):
        pass
    def on_home_clicked(self, button):
        pass
    def on_information_clicked(self, button):
        pass
    def on_delete_clicked(self, button):
        pass
    def on_add_clicked(self, button):
        box = self.builder.get_object("boxMain")
        button1 = Gtk.Button()
        button1.set_label("Button")
        box.pack_start(button1,True,True,0)
        button1.show()
        print("done")


GUI()
Gtk.main()