개정판 6a19b48d
issue #00000 페이지 이미지 download 로직 수정
Change-Id: I4da03c36b5a135eea80b57b20ada38239afd1082
| KCOM/Common/ImageAsyncHelper.cs | ||
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using System.Text; |
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using System.Threading.Tasks; |
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using System.Windows; |
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using System.Windows.Controls; |
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using System.Windows.Data; |
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using System.Windows.Media.Imaging; |
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namespace KCOM.Common |
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{
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public class ImageAsyncHelper : DependencyObject
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public class LazyImage : DependencyObject
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{
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public static Uri GetSourceUri(DependencyObject obj) { return (Uri)obj.GetValue(SourceUriProperty); }
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public static void SetSourceUri(DependencyObject obj, Uri value) { obj.SetValue(SourceUriProperty, value); }
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public static readonly DependencyProperty SourceProperty = DependencyProperty.Register("Source", typeof(string), typeof(LazyImage), new PropertyMetadata(null, OnSourcePropertyChanged));
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public static readonly DependencyProperty SourceUriProperty = DependencyProperty.RegisterAttached("SourceUri", typeof(Uri), typeof(ImageAsyncHelper), new PropertyMetadata
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private static async void OnSourcePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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PropertyChangedCallback = (obj, e) => |
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{
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//if (((System.Windows.Controls.Image)obj).Source == null) |
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//{
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System.Diagnostics.Debug.WriteLine(e.NewValue); |
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((System.Windows.Controls.Image)obj).SetBinding(System.Windows.Controls.Image.SourceProperty, |
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new Binding("VerifiedUri")
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{
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Source = new ImageAsyncHelper { GivenUri = (Uri)e.NewValue },
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IsAsync = true, |
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}); |
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//} |
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} |
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}); |
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Image imageControl = d as Image; |
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string imagePath = e.NewValue as string; |
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Uri GivenUri; |
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public Uri VerifiedUri |
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{
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get |
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if (imageControl != null && imagePath != null && !string.IsNullOrEmpty(imagePath)) |
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{
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try
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if (imageControl.IsLoaded && imageControl.ActualWidth > 0 && imageControl.ActualHeight > 0)
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{
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//Dns.GetHostEntry(GivenUri.DnsSafeHost); |
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return GivenUri; |
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await LoadImageAsync(imagePath, imageControl); |
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} |
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catch (Exception)
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else
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{
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return null; |
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RoutedEventHandler onImageControlLoaded = null; |
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onImageControlLoaded = async (sender, args) => |
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{
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imageControl.Loaded -= onImageControlLoaded; |
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await LoadImageAsync(imagePath, imageControl); |
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}; |
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imageControl.Loaded += onImageControlLoaded; |
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} |
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} |
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} |
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public string Source |
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{
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get { return (string)GetValue(SourceProperty); }
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set { SetValue(SourceProperty, value); }
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} |
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private static async Task LoadImageAsync(string path, Image imageControl) |
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{
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BitmapImage image = new BitmapImage(); |
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image.BeginInit(); |
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image.UriSource = new Uri(path); |
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image.CacheOption = BitmapCacheOption.OnLoad; |
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image.EndInit(); |
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await image.Dispatcher.BeginInvoke(new Action(() => |
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{
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imageControl.Source = image; |
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})); |
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} |
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} |
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} |
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