protected override async void OnNavigatedTo(NavigationEventArgs e)
{
item = e.Parameter as ImageFileInfo;
canNavigateWithUnsavedChanges = false;
ImageSource = await item.GetImageSourceAsync();
if (item != null)
{
ConnectedAnimation imageAnimation = ConnectedAnimationService.GetForCurrentView().GetAnimation("itemAnimation");
if (imageAnimation != null)
{
targetImage.Source = ImageSource;
imageAnimation.Completed += async(s, e_) =>
{
await LoadBrushAsync();
// This delay prevents a flicker that can happen when
// a large image is being loaded to the brush. It gives
// the image time to finish loading. (200 is ok, 400 to be safe.)
await Task.Delay(400);
targetImage.Source = null;
};
imageAnimation.TryStart(targetImage);
}
if (ImageSource.PixelHeight == 0 && ImageSource.PixelWidth == 0)
{
// There is no editable image loaded. Disable zoom and edit
// to prevent other errors.
EditButton.IsEnabled = false;
ZoomButton.IsEnabled = false;
}
;
}
else
{
// error
}
if (this.Frame.CanGoBack)
{
BackButton.Visibility = Microsoft.UI.Xaml.Visibility.Visible;
}
else
{
BackButton.Visibility = Microsoft.UI.Xaml.Visibility.Collapsed;
}
base.OnNavigatedTo(e);
}
private async Task LoadSavedImageAsync(StorageFile imageFile, bool replaceImage)
{
item.NeedsSaved = false;
var newItem = await MainPage.LoadImageInfo(imageFile);
ResetEffects();
// Get the index of the original image so we can
// insert the saved image in the same place.
var index = MainPage.Current.Images.IndexOf(item);
item = newItem;
this.Bindings.Update();
UnloadObject(imgRect);
FindName("imgRect");
await LoadBrushAsync();
// Insert the saved image into the collection.
if (replaceImage == true)
{
MainPage.Current.Images.RemoveAt(index);
MainPage.Current.Images.Insert(index, item);
}
else
{
MainPage.Current.Images.Insert(index + 1, item);
}
// Replace the persisted image used for connected animation.
MainPage.Current.UpdatePersistedItem(item);
// Update BitMapImage used for small picture.
ImageSource = await item.GetImageSourceAsync();
SmallImage.Source = ImageSource;
}