protected override void OnBindingContextChanged()
{
base.OnBindingContextChanged();
var mediaItem = BindingContext as MediaItem;
if (mediaItem != null)
{
_contentBounds.X = 0;
ForegroundContent.Layout(_contentBounds);
UserThumbnailView.ImageUrl = mediaItem.ImagePath ?? "";
NameLabel.Text = mediaItem.Name + " An item with a pannable content overlay";
}
}
void MainLayout_OnLayoutChildren(double x, double y, double width, double height)
{
//TODO - if dragging, probably ignore this
if (_contentBounds == Rectangle.Zero)
{
_contentBounds = new Rectangle(0, 0, width, height);
}
else if (_contentBounds.Width != width)
{
_contentBounds.Width = width;
_contentBounds.Height = height;
}
BackgroundContent.Layout(new Rectangle(width / 2, 0, width / 2, height));
ForegroundContent.Layout(_contentBounds);
}
void Gesture_OnAction(BaseGestureRecognizer recgonizer, GestureRecognizerState state)
{
var panGesture = recgonizer as PanGestureRecognizer;
Point translation = panGesture.GetTranslationInView(MainLayout);
Point velocity = panGesture.GetVelocityInView(MainLayout);
panGesture.SetTranslationInView(new Point(0, 0), MainLayout);
Debug.WriteLine("GESTURE STATE " + state + " trans " + translation);
switch (panGesture.State)
{
case GestureRecognizerState.Began:
break;
case GestureRecognizerState.Changed:
if (recgonizer.View == ForegroundContent)
{
_contentBounds.X += translation.X;
_contentBounds.Y = 0;
ForegroundContent.Layout(_contentBounds);
}
break;
case GestureRecognizerState.Cancelled:
case GestureRecognizerState.Ended:
case GestureRecognizerState.Failed:
_contentBounds.X = (_contentBounds.X > -(MainLayout.Width / 4)) ? 0 : -(MainLayout.Width / 2);
ForegroundContent.LayoutTo(_contentBounds);
break;
case GestureRecognizerState.Possible:
default:
break;
}
}