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using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using Microsoft.Phone.Controls;
using Microsoft.Devices; using System.Windows.Navigation;
namespace Demo.Device.Camera { public partial class Focus : PhoneApplicationPage { private PhotoCamera _camera;
public Focus() { InitializeComponent(); }
protected override void OnNavigatedTo(NavigationEventArgs e) { if (PhotoCamera.IsCameraTypeSupported(CameraType.Primary)) { _camera = new PhotoCamera(CameraType.Primary); _camera.AutoFocusCompleted += _camera_AutoFocusCompleted;
videoBrush.SetSource(_camera); } }
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e) { _camera.AutoFocusCompleted -= _camera_AutoFocusCompleted; }
void _camera_AutoFocusCompleted(object sender, CameraOperationCompletedEventArgs e) { if (e.Succeeded) { Deployment.Current.Dispatcher.BeginInvoke(delegate() { lblMsg.Text = "自动对焦完成"; }); } else { Deployment.Current.Dispatcher.BeginInvoke(delegate() { lblMsg.Text = "自动对焦失败"; }); } }
private void btnFocus_Click(object sender, RoutedEventArgs e) { if (_camera.IsFocusSupported == true) { try { _camera.Focus(); lblMsg.Text = "开始自动对焦"; } catch (Exception ex) { this.Dispatcher.BeginInvoke(delegate() { lblMsg.Text = "自动对焦失败:" + ex.ToString(); }); } } else { this.Dispatcher.BeginInvoke(delegate() { lblMsg.Text = "相机不支持自动对焦"; }); } }
private void canvas_Tap(object sender, System.Windows.Input.GestureEventArgs e) { if (_camera != null) { if (_camera.IsFocusAtPointSupported == true) { try { Point tapLocation = e.GetPosition(canvas);
double focusXPercent = tapLocation.X / canvas.Width; double focusYPercent = tapLocation.Y / canvas.Height;
_camera.FocusAtPoint(focusXPercent, focusYPercent);
this.Dispatcher.BeginInvoke(delegate() { lblMsg.Text = String.Format("自动对焦到指定的点{0}X:{1:N2}{2}Y:{3:N2}", System.Environment.NewLine, focusXPercent, System.Environment.NewLine, focusYPercent); }); } catch (Exception ex) { this.Dispatcher.BeginInvoke(delegate() { lblMsg.Text = "自动对焦到指定的点失败:" + ex.ToString(); }); } } else { this.Dispatcher.BeginInvoke(delegate() { lblMsg.Text = "相机不支持自动对焦到指定的点"; }); } } } } }
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