PyGobject（十四）布局容器之Button篇——Gtk.LockButton

Gtk.LockButton

继承关系

Gtk.LockButton锁定与解锁按钮，常用来进行权限管理。Gtk.LockButton是Gtk.Button的直接子类

Methods

方法修饰词 方法名及参数 static new (permission) get_permission () set_permission (permission)

Virtual Methods

Properties

Name Type Flags Short Description permission Gio.Permission r/w The Gio.Permission object controlling this button text-lock str r/w/c 锁定状态显示的文本 text-unlock str r/w/c 解锁状态显示的文本 tooltip-lock str r/w/c 提示用户锁定时显示的文本 tooltip-not-authorized str r/w/c 提示用户不能获得授权时显示的文本 tooltip-unlock str r/w/c 提示用户解锁时显示的文本

Signals

Name Short Description

例子

代码：

#!/usr/bin/env python3# Created by xiaosanyu at 16/6/27# section 015TITLE = "LockButton"DESCRIPTION = """Gtk.LockButton is a widget that can be used in control panels or preference dialogsto allow users to obtain and revoke authorizations needed to operate the controls.The required authorization is represented by a Gio.Permission object.Concrete implementations of Gio.Permission may use PolicyKit or some other authorization framework.To obtain a PolicyKit-based Gio.Permission, use polkit_permission_new()."""import gigi.require_version('Gtk', '3.0')from gi.repository import Gtk, Gdk, Gio, GObjectclass LockButtonWindow(Gtk.Window):    def __init__(self):        Gtk.Window.__init__(self, title="LockButton Demo")        self.set_border_width(10)        parent = Gtk.HBox(spacing=6)        self.box = Gtk.HBox(spacing=6, homogeneous=False)        self.check_button = Gtk.CheckButton("check button")        self.box.pack_start(self.check_button, False, False, 0)        self.box.pack_start(Gtk.Button("button"), False, False, 0)        circular_button = Gtk.Button.new_from_icon_name("emblem-system-symbolic", Gtk.IconSize.MENU)        circular_button.get_style_context().add_class("circular")        self.box.pack_start(circular_button, False, False, 0)        lbtn = Gtk.LockButton()        lbtn.connect("clicked", self.on_clicked)        permission = Gio.SimplePermission.new(allowed=True)        permission.impl_update(True, True, True)        permission.bind_property("allowed", self.box, "sensitive", GObject.BindingFlags.SYNC_CREATE)        lbtn.set_permission(permission)        parent.pack_start(self.box, False, False, 0)        parent.pack_start(lbtn, False, False, 0)        self.add(parent)    def on_clicked(self, button):        if button.get_permission().get_allowed():            self.box.props.sensitive = False            button.get_permission().impl_update(False, True, True)        else:            self.box.props.sensitive = True            button.get_permission().impl_update(True, True, True)def main():    win = LockButtonWindow()    win.connect("delete-event", Gtk.main_quit)    win.show_all()    Gtk.main()if __name__ == "__main__":    main()

分析主要代码
创建一个LockButton，绑定”clicked”事件

lbtn = Gtk.LockButton()lbtn.connect("clicked", self.on_clicked)

创建Gio.SimplePermission对象，将permission的“allowed”属性与self.box的“sensitive”属性绑定

permission = Gio.SimplePermission.new(allowed=True)permission.impl_update(True, True, True)permission.bind_property("allowed", self.check_button, "sensitive", GObject.BindingFlags.SYNC_CREATE)

impl_update(allowed, can_acquire, can_release)[source]
    Parameters:
        allowed (bool) – ‘allowed’ property
    can_acquire (bool) – the new value for the ‘can-acquire’ property
    can_release (bool) – the new value for the ‘can-release’ property

设置LockButton的权限控制对象

lbtn.set_permission(permission)

/(ㄒoㄒ)/~~
无赖，我执行此代码一直显示
”Error releasing permission: Can’t acquire or release permission”

只好在点击事件中做文章

def on_clicked(self, button):    if button.get_permission().get_allowed():        self.box.props.sensitive = False        button.get_permission().impl_update(False, True, True)    else:        self.box.props.sensitive = True        button.get_permission().impl_update(True, True, True)

代码下载地址：http://download.csdn.net/detail/a87b01c14/9594728