Question

请参阅下面的示例。

fread(fmtChunkId, sizeof(char), 4, fp);
if(memcmp(fmtChunkId, "WAVE", 4) != 0) {
    cout << "Not WAVE format" << endl;
    return 0;
}

如何将#!/usr/bin/env python3 import gi gi.require_version('Gtk', '3.0') from gi.repository import Gtk from gi.repository import Gio import sys class ApplicationWindow(Gtk.ApplicationWindow): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self.set_title("Application") self.set_default_size(200, 200) grid = Gtk.Grid() self.add(grid) menubutton = Gtk.MenuButton() grid.attach(menubutton, 0, 0, 1, 1) label = Gtk.Label.new('AnyLabel') grid.attach(label, 0, 1, 1, 1) menumodel = Gio.Menu() menubutton.set_menu_model(menumodel) menumodel.append("New", "app.new") menumodel.append("Quit", "app.quit") menumodel.append("CLabel", "app.clabel") class Application(Gtk.Application): def do_activate(self): window = ApplicationWindow(application=self) window.show_all() def do_startup(self): Gtk.Application.do_startup(self) new_action = Gio.SimpleAction.new("new", None) new_action.connect("activate", self.new_callback) self.add_action(new_action) quit_action = Gio.SimpleAction.new("quit", None) quit_action.connect("activate", self.quit_callback) self.add_action(quit_action) clabel_action = Gio.SimpleAction.new("clabel", None) clabel_action.connect("activate", self.clabel_callback) self.add_action(clabel_action) def new_callback(self, action, parameter): print("You clicked New") def quit_callback(self, action, parameter): print("You clicked Quit") self.quit() def clabel_callback(self, action, parameter): """How to change the label here""" application = Application() exit_status = application.run(sys.argv) sys.exit(exit_status)更改为label类中的clabel_callback方法？

Application方法如何访问clabel_callback并修改任何属性？

[off]注意无聊！它没有意识到有时代码值得千言万语

Answer 1

您可能希望该操作成为ApplicationWindow的一部分，然后您将引用“win.clabel”。

通过操作更改属性

1 个答案: