Windows 8 开发之设置合约的介绍

protected override void OnLaunched(LaunchActivatedEventArgs args)
{
SettingsPane.GetForCurrentView().CommandsRequested += App_CommandsRequested; //注册设置事件
Frame rootFrame = Window.Current.Content as Frame;</p> <p> // 不要在窗口已包含内容时重复应用程序初始化，
// 只需确保窗口处于活动状态
if (rootFrame == null)
{
// 创建要充当导航上下文的框架，并导航到第一页
rootFrame = new Frame();</p> <p> if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: 从之前挂起的应用程序加载状态
}</p> <p> // 将框架放在当前窗口中
Window.Current.Content = rootFrame;
}</p> <p> if (rootFrame.Content == null)
{
// 当未还原导航堆栈时，导航到第一页，
// 并通过将所需信息作为导航参数传入来配置
// 参数
if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
{
throw new Exception("Failed to create initial page");
}
}
// 确保当前窗口处于活动状态
Window.Current.Activate();
}

void App_CommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
{
SettingsCommand cmd = new SettingsCommand("关于", "关于应用", (handle) =>
{
Popup popup = CreatePopup.Create(new AboutPage(),346);
popup.IsOpen = true;

});
SettingsCommand cmd1 = new SettingsCommand("主题", "主题颜色", (handle) =>
{
Popup popup = CreatePopup.Create(new ThemColor(), 346);
popup.IsOpen = true;
});
args.Request.ApplicationCommands.Add(cmd);
args.Request.ApplicationCommands.Add(cmd1);
}

public class CreatePopup
{
public static Popup Create(UserControl element, double width)
{
Popup p = new Popup();
p.Child = element;
p.IsLightDismissEnabled = true;
p.ChildTransitions = new TransitionCollection();
p.ChildTransitions.Add(new PaneThemeTransition() //声明边缘 UI（如应用程序栏）的边缘转换位置。
{
Edge = (SettingsPane.Edge == SettingsEdgeLocation.Right) ?
EdgeTransitionLocation.Right :
EdgeTransitionLocation.Left
});//检查SettingsPane的edge,有些国家的超级菜单在左边。</p> <p> element.Width = width;
element.Height = Window.Current.Bounds.Height;
p.SetValue(Canvas.LeftProperty, SettingsPane.Edge == SettingsEdgeLocation.Right ? (Window.Current.Bounds.Width - width) : 0);//设置距离左边的边距
p.SetValue(Canvas.TopProperty, 0);
return p;
}
}