private void ImageList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ImageList.SelectedItem != null)
{
ListViewItem item = (ListViewItem)ImageList.ContainerFromItem(ImageList.SelectedItem);
Uri imageSource = _imageUriGetterFunc(item.Content, true);
if (_crossFadeBatch == null)
{
// Save the previous image for a cross-fade
_previousSurfaceBrush.Surface = BackgroundImage.SurfaceBrush.Surface;
_previousSurfaceBrush.CenterPoint = BackgroundImage.SurfaceBrush.CenterPoint;
_previousSurfaceBrush.Stretch = BackgroundImage.SurfaceBrush.Stretch;
// Load the new background image
BackgroundImage.ImageOpened += BackgroundImage_ImageChanged;
}
// Update the images
BackgroundImage.Source = imageSource;
PrimaryImage.Source = imageSource;
if (!_transition.Completed)
{
_transition.Cancel();
}
// Kick off a continuity transition to animate from it's current position to it's new location
CompositionImage image = VisualTreeHelperExtensions.GetFirstDescendantOfType <CompositionImage>(item);
_transition.Initialize(this, image, null);
_transition.Start(this, PrimaryImage, null, null);
}
}
private void ThumbnailList_Click(object sender, ItemClickEventArgs e)
{
GridView gridView = (GridView)sender;
GridViewItem item = (GridViewItem)gridView.ContainerFromItem(e.ClickedItem);
CompositionImage image = VisualTreeHelperExtensions.GetFirstDescendantOfType <CompositionImage>(item);
// We are about to transition to a new page. Cancel any outstanding transitions.
if (_currentTransition != null)
{
if (!_currentTransition.Completed)
{
_currentTransition.Cancel();
}
_currentTransition = null;
}
DetailsInfo info;
info.thumbanil = (Thumbnail)e.ClickedItem;
// Setup the new transition and trigger the navigation
ContinuityTransition transition = new ContinuityTransition();
transition.Initialize(_host, image, info);
_host.ContentFrame.Navigate(typeof(ContinuityDetails), transition);
}
private void ContinuityDetails_BackRequested(object sender, BackRequestedEventArgs e)
{
if (!e.Handled)
{
// Unregister the handler
SystemNavigationManager.GetForCurrentView().BackRequested -= ContinuityDetails_BackRequested;
// We are about to transition to a new page. Cancel any outstanding transitions.
if (_currentTransition != null)
{
if (!_currentTransition.Completed)
{
_currentTransition.Cancel();
}
_currentTransition = null;
}
// Setup the new transition and trigger the navigation
ContinuityTransition transition = new ContinuityTransition();
transition.Initialize(_host, ThumbnailImage, _detailsInfo);
_host.ContentFrame.Navigate(typeof(Continuity), transition);
// We've got it handled
e.Handled = true;
}
}
