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原文:重新想象 Windows 8.1 Store Apps (84) - 图像处理的新特性, Share Contract 的新特性
作者:webabcd
介绍
重新想象 Windows 8.1 Store Apps 之图像处理的新特性, Share Contract 的新特性
示例
1、演示图像处理的新特性
RenderTargetBitmapDemo.xaml
<Page x:Class="Windows81.Image.RenderTargetBitmapDemo" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows81.Image" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Grid Background="Transparent"> <StackPanel Margin="120 0 0 0"> <StackPanel Width="200" Name="root" HorizontalAlignment="Left"> <TextBlock Name="lblMsg" FontSize="14.667" Text="i am webabcd" /> <Slider Width="200" /> <Image Source="/Assets/Son.jpg" /> </StackPanel> <Button Name="btnSaveImage" Content="将控件 root 中的内容保存为图片" Click="btnSaveImage_Click" Margin="0 10 0 0" /> <Image Name="image" Margin="0 10 0 0" Stretch="None" HorizontalAlignment="Left" /> </StackPanel> </Grid> </Page>
RenderTargetBitmapDemo.xaml.cs
/* * 演示如何通过 RenderTargetBitmap 对 xaml 截图,以及如何将其保存为图片 * * * RenderTargetBitmap - 用于对 xaml 截图,以及保存截图(其继承自 ImageSource) * PixelWidth, PixelWidth - 宽和高 * RenderAsync() - 对指定的 UIElement 截图 * GetPixelsAsync() - 获取图像的二进制数据(Bgra8 格式,关于 Bgra8 格式请参见:http://www.cnblogs.com/webabcd/archive/2013/05/27/3101069.html) * * * * 关于更多的图像处理基础,以及 WriteableBitmap 的应用请参见: * http://www.cnblogs.com/webabcd/archive/2013/05/27/3101069.html */ using System; using System.Collections.Generic; using System.Runtime.InteropServices.WindowsRuntime; using Windows.Graphics.Display; using Windows.Graphics.Imaging; using Windows.Storage; using Windows.Storage.Pickers; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Media.Imaging; namespace Windows81.Image { public sealed partial class RenderTargetBitmapDemo : Page { public RenderTargetBitmapDemo() { this.InitializeComponent(); } private async void btnSaveImage_Click(object sender, RoutedEventArgs e) { // 实例化 RenderTargetBitmap 并对指定的 UIElement 截图,同时指定截图的宽和高 RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(); await renderTargetBitmap.RenderAsync(root, (int)root.ActualWidth, (int)root.ActualHeight); // 由于 RenderTargetBitmap 继承自 ImageSource,所以可以直接显示(WriteableBitmap 也继承了 ImageSource) image.Source = renderTargetBitmap; // 获取截图的像素数据 var pixelBuffer = await renderTargetBitmap.GetPixelsAsync(); // 实例化一个 FileSavePicker 用于保存图片 var savePicker = new FileSavePicker(); savePicker.DefaultFileExtension = ".png"; savePicker.FileTypeChoices.Add(".png", new List<string> { ".png" }); savePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; savePicker.SuggestedFileName = "snapshot.png"; var saveFile = await savePicker.PickSaveFileAsync(); if (saveFile == null) return; // 对二进制图像数据做 png 编码处理(关于更多的图像处理的示例请参见:http://www.cnblogs.com/webabcd/archive/2013/05/27/3101069.html) using (var fileStream = await saveFile.OpenAsync(FileAccessMode.ReadWrite)) { var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, fileStream); encoder.SetPixelData( BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, (uint)renderTargetBitmap.PixelWidth, (uint)renderTargetBitmap.PixelHeight, DisplayInformation.GetForCurrentView().LogicalDpi, DisplayInformation.GetForCurrentView().LogicalDpi, pixelBuffer.ToArray()); // 保存 png 图片 await encoder.FlushAsync(); } } } }
2、演示 Share Contract 的新特性
共享源:
ShareSource.xaml
<Page x:Class="Windows81.ShareContract.ShareSource" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows81.ShareContract" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Grid Background="Transparent"> <StackPanel Margin="120 0 0 0"> <TextBlock Name="lblMsg" FontSize="14.667" /> <Button Content="Share WebLink" Click="Button_Click" Margin="0 10 0 0" /> <Button Content="Share ApplicationLink" Click="Button_Click" Margin="0 10 0 0" /> </StackPanel> </Grid> </Page>
ShareSource.xaml.cs
/* * 演示 Share Contract 的新特性(增加 WebLink, ApplicationLink, 去掉了 Uri, “共享目标”可以自己 dismiss) * * * 本例为“共享源” * * * 注:关于 Share Contract 的基础请参见:http://www.cnblogs.com/webabcd/archive/2013/07/04/3171085.html */ using System; using Windows.ApplicationModel.DataTransfer; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Navigation; namespace Windows81.ShareContract { public sealed partial class ShareSource : Page { // 当前需要分享的内容的类型 private string _shareType = "Share WebLink"; public ShareSource() { this.InitializeComponent(); } protected override void OnNavigatedTo(NavigationEventArgs e) { // 初始化 DataTransferManager DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView(); dataTransferManager.DataRequested += dataTransferManager_DataRequested; dataTransferManager.TargetApplicationChosen += dataTransferManager_TargetApplicationChosen; } void dataTransferManager_DataRequested(DataTransferManager sender, DataRequestedEventArgs args) { // 共享操作开始时(即弹出共享面板后),根据需要分享的内容的类型执行指定的方法 switch (_shareType) { case "Share WebLink": // win 8.1 新增(一个 web 链接),去掉了原 Uri 共享(即在 win8.1 中将 Uri 拆分为 WebLink 和 ApplicationLink) ShareWebLink(sender, args); break; case "Share ApplicationLink": // win 8.1 新增(一个 app 的自定义协议),去掉了原 Uri 共享(即在 win8.1 中将 Uri 拆分为 WebLink 和 ApplicationLink) ShareApplicationLink(sender, args); break; default: break; } } void dataTransferManager_TargetApplicationChosen(DataTransferManager sender, TargetApplicationChosenEventArgs args) { // 显示用户需要与其共享内容的应用程序的名称 lblMsg.Text = "共享给:" + args.ApplicationName; } private void Button_Click(object sender, RoutedEventArgs e) { _shareType = (sender as Button).Content.ToString(); // 弹出共享面板,以开始共享操作 DataTransferManager.ShowShareUI(); } // 共享 WebLink 的 Demo private void ShareWebLink(DataTransferManager dtm, DataRequestedEventArgs args) { // 设置用于共享给“共享目标”的一些信息 DataPackage dataPackage = args.Request.Data; dataPackage.Properties.Title = "Title"; dataPackage.Properties.Description = "Description"; // dataPackage.Properties.ApplicationListingUri - app 在商店中的 uri // dataPackage.Properties.ApplicationName // dataPackage.Properties.PackageFamilyName - win8.1 新增 // dataPackage.Properties.LogoBackgroundColor - win8.1 新增,app 的 Square30x30Logo 图标的背景色(图标在“共享目标”的右上角显示) // dataPackage.Properties.ContentSourceWebLink - win8.1 新增 // dataPackage.Properties.ContentSourceApplicationLink - win8.1 新增 dataPackage.SetWebLink(new Uri("http://webabcd.cnblogs.com")); } // 共享 ApplicationLink 的 Demo private void ShareApplicationLink(DataTransferManager dtm, DataRequestedEventArgs args) { // 设置用于共享给“共享目标”的一些信息 DataPackage dataPackage = args.Request.Data; dataPackage.Properties.Title = "Title"; dataPackage.Properties.Description = "Description"; // dataPackage.Properties.ApplicationListingUri - app 在商店中的 uri // dataPackage.Properties.ApplicationName // dataPackage.Properties.PackageFamilyName - win8.1 新增 // dataPackage.Properties.LogoBackgroundColor - win8.1 新增,app 的 Square30x30Logo 图标的背景色(图标在“共享目标”的右上角显示) // dataPackage.Properties.ContentSourceWebLink - win8.1 新增 // dataPackage.Properties.ContentSourceApplicationLink - win8.1 新增 dataPackage.SetApplicationLink(new Uri("webabcd:webabcd.cnblogs.com")); } } }
共享目标:
ShareTarget.xaml
<Page x:Class="Windows81.ShareContract.ShareTarget" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows81.ShareContract" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Grid Background="Transparent"> <StackPanel Margin="120 0 0 0"> <TextBlock Name="lblMsg" FontSize="14.667" Margin="0 10 0 0" /> <Button Name="btnDismiss" Content="dismiss" Click="btnDismiss_Click" Margin="0 10 0 0" /> </StackPanel> </Grid> </Page>
ShareTarget.xaml.cs
/* * 演示 Share Contract 的新特性(增加 WebLink, ApplicationLink, 去掉了 Uri, “共享目标”可以自己 dismiss) * * * 本例为“共享目标” * 1、请在 manifest 中增加相应的声明,并增加共享“WebLink”和“ApplicationLink”的数据格式 * * * 注:关于 Share Contract 的基础请参见:http://www.cnblogs.com/webabcd/archive/2013/07/04/3171085.html */ using System; using System.Threading.Tasks; using Windows.ApplicationModel.Activation; using Windows.ApplicationModel.DataTransfer; using Windows.ApplicationModel.DataTransfer.ShareTarget; using Windows.UI.Core; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Navigation; namespace Windows81.ShareContract { public sealed partial class ShareTarget : Page { private ShareOperation _shareOperation; public ShareTarget() { this.InitializeComponent(); } protected async override void OnNavigatedTo(NavigationEventArgs e) { // 获取 ShareOperation 对象 ShareTargetActivatedEventArgs shareTargetActivated = (ShareTargetActivatedEventArgs)e.Parameter; if (shareTargetActivated == null) { lblMsg.Text = "为了演示共享目标,请从共享源激活本页面"; return; } _shareOperation = shareTargetActivated.ShareOperation; // 异步获取共享数据 await Task.Factory.StartNew(async () => { // 如果共享数据中包含 WebLink 格式数据,则显示之 if (_shareOperation.Data.Contains(StandardDataFormats.WebLink)) { try { var uri = await _shareOperation.Data.GetWebLinkAsync(); OutputMessage("WebLink: " + uri.AbsoluteUri); } catch (Exception ex) { OutputMessage(ex.ToString()); } } // 如果共享数据中包含 ApplicationLink 格式数据,则显示之 if (_shareOperation.Data.Contains(StandardDataFormats.ApplicationLink)) { try { var uri = await _shareOperation.Data.GetApplicationLinkAsync(); OutputMessage("ApplicationLink: " + uri.AbsoluteUri); } catch (Exception ex) { OutputMessage(ex.ToString()); } } // 获取“共享源”传递过来的信息 OutputMessage("ContentSourceApplicationLink: " + _shareOperation.Data.Properties.ContentSourceApplicationLink); // win 8.1 新增 OutputMessage("ContentSourceWebLink: " + _shareOperation.Data.Properties.ContentSourceWebLink); // win 8.1 新增 OutputMessage("PackageFamilyName: " + _shareOperation.Data.Properties.PackageFamilyName); // win 8.1 新增 OutputMessage("LogoBackgroundColor: " + _shareOperation.Data.Properties.LogoBackgroundColor); // win 8.1 新增 OutputMessage("ApplicationListingUri: " + _shareOperation.Data.Properties.ApplicationListingUri); OutputMessage("ApplicationName: " + _shareOperation.Data.Properties.ApplicationName); }); } // 在 UI 上输出指定的信息 async private void OutputMessage(string message) { await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => { lblMsg.Text += message; lblMsg.Text += Environment.NewLine; }); } private void btnDismiss_Click(object sender, RoutedEventArgs e) { // ShareOperation.DismissUI() - win8.1 中新增,用于 dismiss 掉当前的“共享目标” _shareOperation.DismissUI(); } } } /* * 为了激活“共享目标”,需要在 App.xaml.cs 中 override 如下方法 // 通过共享激活应用程序时所调用的方法 protected override void OnShareTargetActivated(ShareTargetActivatedEventArgs args) { var rootFrame = new Frame(); rootFrame.Navigate(typeof(Windows81.ShareContract.ShareTarget), args); Window.Current.Content = rootFrame; Window.Current.Activate(); } */
OK
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重新想象 Windows 8.1 Store Apps (84) - 图像处理的新特性, Share Contract 的新特性
标签:des style blog http color io os ar for
原文地址:http://www.cnblogs.com/lonelyxmas/p/3988200.html