在Gtk.ListBox中对行进行排序

huangapple
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英文:

Sorting rows in a Gtk.ListBox

问题

我正在尝试根据搜索查询对Gtk.ListBox中的行进行排序。似乎GTK有一种使用set_sort_func()来实现这一功能的本地方法，但是我找不到任何好的示例来说明如何使用它。是否有人可以提供一个示例来演示如何实现这个功能？

英文:

I'm trying to sort rows in a Gtk.ListBox based on a search query. It seems that GTK has a native way of doing this with set_sort_func(), however I can't find any good examples on how to use it. Could someone provide an example of how this may be done?

答案1

得分: 1

你没有说你使用的是哪个版本的Gtk，所以我假设你使用的是Gtk4。下面是一个使用Gtk.ListBox中的排序函数的最小示例代码。

警告：如果Gtk.ListBox是基于模型构建的，则无法使用此函数。

  1. import random
  2. from gi.repository import Gtk
  3. import gi
  4. gi.require_version('Gtk', '4.0')
  6. class MainWindow(Gtk.ApplicationWindow):
  7.     def __init__(self, *args, **kwargs):
  8.         super().__init__(*args, **kwargs)
  9.         self.box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=10)
  10.         self.set_child(self.box)
  12.         self.button = Gtk.Button(label="插入行")
  13.         self.box.append(self.button)
  15.         self.set_default_size(800, 600)
  17.         self.list_box = Gtk.ListBox.new()
  18.         self.list_box.set_sort_func(self.sort_function)
  20.         self.box.append(self.list_box)
  22.         self.button.connect('clicked', self.add)
  24.     def add(self, button):
  25.         number = random.randint(0, 100)
  26.         row = self.row_setup(f"测试 {number}", f"{number} ")
  28.         self.list_box.append(row)
  30.     def sort_function(self, one, two):
  31.         one_number = int(one.get_child().get_first_child().props.label)
  32.         two_number = int(two.get_child().get_first_child().props.label)
  34.         if one_number < two_number:
  35.             return -1
  36.         elif one_number > two_number:
  37.             return 1
  38.         else:
  39.             return 0
  41.     def row_setup(self, title, number):
  42.         row = Gtk.ListBoxRow.new()
  43.         row_box = Gtk.Box()
  44.         row_title = Gtk.Label.new(title)
  45.         row_number = Gtk.Label.new(number)
  46.         row_box.append(row_number)
  47.         row_box.append(row_title)
  48.         row.set_child(row_box)
  50.         return row
  52. class MyApp(Gtk.Application):
  53.     def __init__(self, **kwargs):
  54.         super().__init__(**kwargs)
  55.         self.connect('activate', self.on_activate)
  57.     def on_activate(self, app):
  58.         self.win = MainWindow(application=app)
  59.         self.win.present()
  61. app = MyApp(application_id="com.example.GtkApplication")
  62. app.run(None)
英文:

You didn't say what version of Gtk you're using, so I'm going to assume it's Gtk4. Below is a minimal example code for how to use the sort function in a Gtk.ListBox.

Warning: This function cannot be used if the Gtk.ListBox is built based on a model.

  2.     import random
  3.     from gi.repository import Gtk
  4.     import gi
  5.     gi.require_version(&#39;Gtk&#39;, &#39;4.0&#39;)
  6.     
  7.     
  8.     class MainWindow(Gtk.ApplicationWindow):
  9.         def __init__(self, *args, **kwargs):
  10.             super().__init__(*args, **kwargs)
  11.             self.box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=10)
  12.             self.set_child(self.box)
  13.     
  14.             self.button = Gtk.Button(label=&quot;Insert Row&quot;)
  15.             self.box.append(self.button)
  16.     
  17.             self.set_default_size(800, 600)
  18.     
  19.             self.list_box = Gtk.ListBox.new()
  20.             self.list_box.set_sort_func(self.sort_function)
  21.     
  22.             self.box.append(self.list_box)
  23.     
  24.             self.button.connect(&#39;clicked&#39;, self.add)
  25.     
  26.         def add(self, button):
  27.     
  28.             number = random.randint(0, 100)
  29.             row = self.row_setup(f&quot;test {number}&quot;, f&quot;{number} &quot;)
  30.     
  31.             self.list_box.append(row)
  32.     
  33.         def sort_function(self, one, two):
  34.     
  35.             one_number = int(one.get_child().get_first_child().props.label)
  36.             two_number = int(two.get_child().get_first_child().props.label)
  37.     
  38.             if one_number &lt; two_number:
  39.                 return -1
  40.             elif one_number &gt; two_number:
  41.                 return 1
  42.             else:
  43.                 return 0
  44.     
  45.         def row_setup(self, title, number):
  46.     
  47.             row = Gtk.ListBoxRow.new()
  48.             row_box = Gtk.Box()
  49.             row_title = Gtk.Label.new(title)
  50.             row_number = Gtk.Label.new(number)
  51.             row_box.append(row_number)
  52.             row_box.append(row_title)
  53.             row.set_child(row_box)
  54.     
  55.             return row
  56.     
  57.     
  58.     class MyApp(Gtk.Application):
  59.         def __init__(self, **kwargs):
  60.             super().__init__(**kwargs)
  61.             self.connect(&#39;activate&#39;, self.on_activate)
  62.     
  63.         def on_activate(self, app):
  64.             self.win = MainWindow(application=app)
  65.             self.win.present()
  66.     
  67.     
  68.     app = MyApp(application_id=&quot;com.example.GtkApplication&quot;)
  69.     app.run(None)

huangapple
  • 本文由 发表于 2023年8月9日 01:18:46
  • 转载请务必保留本文链接：https://go.coder-hub.com/76861862.html
  • gtk
  • python
  • sorting
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