protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
base.OnLayout(changed, l, t, r, b);
// If we're using a PageContainer (i.e., we've wrapped our contents in a Fragment),
// Make sure that it gets laid out
if (_pageContainer != null)
{
if (_isMaster)
{
var controller = (IMasterDetailPageController)_parent;
var width = (int)Context.ToPixels(controller.MasterBounds.Width);
// When the base class computes the size of the Master container, it starts at the top of the
// screen and adds padding (_parent.MasterBounds.Top) to leave room for the status bar
// When this container is laid out, it's already starting from the adjusted y value of the parent,
// so we subtract _parent.MasterBounds.Top from our starting point (to get 0) and add it to the
// bottom (so the master page stretches to the bottom of the screen)
var height = (int)Context.ToPixels(controller.MasterBounds.Height + controller.MasterBounds.Top);
_pageContainer.Layout(0, 0, width, height);
}
else
{
_pageContainer.Layout(l, t, r, b);
}
_pageContainer.Child.UpdateLayout();
}
}
void ToggleShowing(bool isShowing, bool animated)
{
if (_contentPage == null)
{
_contentPage = new YoutubeStyleContentPage();
_contentPage.ParentHeight = Height;
PageContainer.Content = _contentPage;
_panGesture = new PanGestureRecognizer();
_panGesture.OnAction += Gesture_OnAction;
_panGesture.IsConsumingTouchesInParallel = true;
_contentPage.VideoPlayerView.AddGestureRecognizer(_panGesture);
}
var minHeight = _contentPage.MinimumHeightRequest;
var minWidth = _contentPage.MinimumWidthRequest;
_contentBounds.Y = isShowing ? 0 : Height - minHeight;
_contentBounds.X = isShowing ? 0 : Width - minWidth;
_contentBounds.Width = isShowing ? Width : minWidth;
_contentBounds.Height = isShowing ? Height : minHeight;
if (MediaItemsListView.SelectedItem != null)
{
_contentPage.Item = MediaItemsListView.SelectedItem as MediaItem;
}
if (animated)
{
PageContainer.LayoutTo(_contentBounds);
}
else
{
PageContainer.Layout(_contentBounds);
}
}
void MainLayout_OnLayoutChildren(double x, double y, double width, double height)
{
MediaItemsListView.Layout(new Rectangle(0, 0, Width, Height));
if (!_didLayoutContainer)
{
_contentBounds.Y = height - 100;
_contentBounds.X = width - 160;
_contentBounds.Width = 160;
_contentBounds.Height = 100;
_didLayoutContainer = true;
}
PageContainer.Layout(_contentBounds);
}
void Gesture_OnAction(BaseGestureRecognizer recgonizer, GestureRecognizerState state)
{
if (recgonizer.View != _contentPage.VideoPlayerView)
{
return;
}
var panGesture = recgonizer as PanGestureRecognizer;
Point translation = panGesture.GetTranslationInView(MainLayout);
Point velocity = panGesture.GetVelocityInView(MainLayout);
panGesture.SetTranslationInView(new Point(0, 0), MainLayout);
switch (panGesture.State)
{
case GestureRecognizerState.Began:
break;
case GestureRecognizerState.Changed:
var newY = _contentBounds.Y + translation.Y;
if (newY > 0 && newY < Height - _contentPage.MinimumHeightRequest)
{
var minHeight = _contentPage.MinimumHeightRequest;
var minWidth = _contentPage.MinimumWidthRequest;
_contentBounds.Y = newY;
var complete = Math.Min(1, (Height - (_contentBounds.Y + minHeight)) / Height);
// Debug.WriteLine ("complete {0} newY {1} h{2}", complete, newY, Height);
var inverseCompletion = 1 - complete;
_contentBounds.X = (Width - minWidth) * inverseCompletion;
_contentBounds.Width = (minWidth) + ((Width - minWidth) * complete);
_contentBounds.Height = Math.Max(minHeight, (Height + minHeight) * complete);
PageContainer.Layout(_contentBounds);
}
break;
case GestureRecognizerState.Cancelled:
case GestureRecognizerState.Ended:
case GestureRecognizerState.Failed:
var isShowing = _contentBounds.Y < 200;
ToggleShowing(isShowing, true);
break;
default:
break;
}
}
