private void SetupPage()
{
if (_visiblePageIndex != SelectedIndex && ItemsSource != null)
{
_currentView = (MycoView)ItemTemplate.CreateContent();
_currentView.BindingContext = ItemsSource[SelectedIndex];
_currentView.Parent = this;
_currentView.Layout(new Rectangle(0, 0, Bounds.Width, Bounds.Height));
_currentView.TranslationX = 0;
if (_nextView != null)
{
_nextView.Parent = null;
_nextView = null;
}
_visiblePageIndex = SelectedIndex;
Invalidate();
}
else if (ItemsSource == null)
{
_currentView = null;
_nextView = null;
Invalidate();
}
}
protected override void InternalLayout(Rectangle rectangle)
{
base.InternalLayout(rectangle);
if (_currentView != null)
{
_currentView.Layout(new Rectangle(0, 0, rectangle.Width, rectangle.Height));
}
if (_nextView != null)
{
_nextView.Layout(new Rectangle(0, 0, rectangle.Width, rectangle.Height));
}
}
public async Task AnimateToPage(int index)
{
// really animate to new page ?
if (_visiblePageIndex != index && _nextView == null && ItemsSource != null)
{
// get animation direction
var translation = _visiblePageIndex < index ? Width : -Width;
// indicate this is the one that is visible
_visiblePageIndex = index;
// save selected
SelectedIndex = index;
// get view to move to
_nextView = (MycoView)ItemTemplate.CreateContent();
_nextView.BindingContext = ItemsSource[index];
_nextView.Parent = this;
_nextView.Layout(new Rectangle(0, 0, Bounds.Width, Bounds.Height));
// setup the next view offscreen
_nextView.TranslationX = translation;
// view to set to once complete
var targetView = _nextView;
var oldView = _currentView;
// animate new in, ol dout
await Task.WhenAll(_nextView.TranslateTo(0, 0, 250, Easing.CubicInOut), _currentView.TranslateTo(-translation, 0, 250, Easing.CubicInOut));
// setup the current view
_currentView = targetView;
// null out old view
oldView.Parent = null;
oldView = null;
// allow next animation
_nextView = null;
}
}
private void SetupPage()
{
if (_visiblePageIndex != SelectedIndex && SelectedIndex >= 0 && SelectedIndex < Children.Count)
{
// only show the current view
_currentView = Children[SelectedIndex];
_currentView.IsVisible = true;
_currentView.Layout(new Rectangle(0, 0, Bounds.Width, Bounds.Height));
_currentView.TranslationX = 0;
if (_nextView != null)
{
_nextView.IsVisible = false;
_nextView = null;
}
_visiblePageIndex = SelectedIndex;
Invalidate();
}
}
public async Task AnimateToPage(int index)
{
// really animate to new page ?
if (index >= 0 && index < Children.Count && _visiblePageIndex != index && _nextView == null)
{
// get animation direction
var translation = _visiblePageIndex < index ? Width : -Width;
// indicate this is the one that is visible
_visiblePageIndex = index;
// save selected
SelectedIndex = index;
// get view to move to
_nextView = Children[index];
_nextView.IsVisible = true;
_nextView.Layout(new Rectangle(0, 0, Bounds.Width, Bounds.Height));
// setup the next view offscreen
_nextView.TranslationX = translation;
// view to set to once complete
var targetView = _nextView;
var oldView = _currentView;
// animate new in, ol dout
await Task.WhenAll(_nextView.TranslateTo(0, 0, 250, Easing.CubicInOut), _currentView.TranslateTo(-translation, 0, 250, Easing.CubicInOut));
// setup the current view
_currentView = targetView;
// null out old view
oldView.IsVisible = false;
// allow next animation
_nextView = null;
}
}