Windows 8 for the .NET developer
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The document discusses functions from the avicap32.dll library for creating a video capture window and retrieving media properties in C++. It also shows using the CameraCaptureUI class in C# for launching the camera capture UI and getting a bitmap image from a photo or video capture.
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Windows 8 for the .NET developer
- 8. DllImport "avicap32.dll" "capCreateCaptureWindow" static extern int string int int int int int int int DllImport "avicap32.dll" static extern bool int MarshalAs UnmanagedType ref string int MarshalAs UnmanagedType ref string int // more and more of the same
- 9. using Windows.Media.Capture; var new CameraCaptureUI new Size var await CameraCaptureUIMode if var new BitmapImage await FileAccessMode
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- PrepVisual Studio 11 loadedDemoNew Metro project. Discuss templates.Add some content. Talk about design & C shape. Do some in XAML. Set style in property drag on button. <Grid Background="{StaticResourceApplicationPageBackgroundBrush}"> <Grid.ColumnDefinitions> <ColumnDefinition Width="120"/> <ColumnDefinition/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="120"/> <RowDefinition /> <RowDefinition Height="120"/> </Grid.RowDefinitions> <TextBlockGrid.Column="1" Grid.Row="0" Text="Community Night" Style="{StaticResourcePageHeaderTextStyle}" /> <Button Content="Demo 1" Grid.Column="1" HorizontalAlignment="Left" Margin="189,132,0,0" Grid.Row="1" VerticalAlignment="Top" Width="115" Style="{StaticResourceTextButtonStyle}"/> </Grid>Code behind for buttonnew MessageDialog("Welcome to Windows 8!", "Community Night").ShowAsync(); Run, then run in emulatorLook at the code and talk async for a bit.Demo 2Add another buttonCode behind – talk async. Talk pickers. Show picking from photosprivate async void Button_Click_2(object sender, RoutedEventArgs e) {var picker = new Windows.Storage.Pickers.FileOpenPicker();picker.FileTypeFilter.Add(".jpg");picker.FileTypeFilter.Add(".png");picker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.PicturesLibrary;picker.ViewMode = Windows.Storage.Pickers.PickerViewMode.Thumbnail;var result = await picker.PickSingleFileAsync(); await new MessageDialog(string.Format("You picked {0}", result.DisplayName)).ShowAsync(); }Demo 3 – new button again. Add following, break, show manifest talk about settings and permissions. Fix run show settings. private async void Button_Click_3(object sender, RoutedEventArgs e) {vargps = new Windows.Devices.Geolocation.Geolocator();var location = await gps.GetGeopositionAsync(); await new MessageDialog(string.Format("You picked at {0}-{1}", location.Coordinate.Latitude, location.Coordinate.Longitude)).ShowAsync(); }Demo 4 needs a textbox and a buttonprivate void Button_Click_4(object sender, RoutedEventArgs e) {var text = blah.Text;var manager = DataTransferManager.GetForCurrentView();manager.DataRequested += (s, args) => {args.Request.Data.Properties.Title = "From Community Night";args.Request.Data.SetText(text); };DataTransferManager.ShowShareUI(); }Demo 5 – Add search contract demo page and show the tie in