protected override void Dispose(bool disposing)
{
if (disposing && !_disposed)
{
if (prevBtn != null)
{
prevBtn.Click -= PrevBtn_Click;
prevBtn.Dispose();
prevBtn = null;
}
if (nextBtn != null)
{
nextBtn.Click -= NextBtn_Click;
nextBtn.Dispose();
nextBtn = null;
}
if (indicators != null)
{
indicators.Dispose();
indicators = null;
}
if (viewPager != null)
{
viewPager.PageSelected -= ViewPager_PageSelected;
viewPager.PageScrollStateChanged -= ViewPager_PageScrollStateChanged;
if (viewPager.Adapter != null)
{
viewPager.Adapter.Dispose();
}
viewPager.Dispose();
viewPager = null;
}
if (Element != null)
{
Element.SizeChanged -= Element_SizeChanged;
if (Element.ItemsSource != null && Element.ItemsSource is INotifyCollectionChanged)
{
((INotifyCollectionChanged)Element.ItemsSource).CollectionChanged -= ItemsSource_CollectionChanged;
}
}
_disposed = true;
}
try
{
base.Dispose(disposing);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return;
}
}
void SetNativeView()
{
if (orientationChanged)
{
var inflater = AViews.LayoutInflater.From(_context);
try
{
// Orientation BP
if (Element.Orientation == CarouselViewOrientation.Horizontal)
{
var hz = Resource.Layout.horizontal_viewpager;
nativeView = inflater.Inflate(hz, null);
}
else
{
nativeView = inflater.Inflate(Resource.Layout.vertical_viewpager, null);
}
}
catch (Exception ex) {
Console.WriteLine(ex.Message);
}
viewPager = nativeView.FindViewById <ViewPager>(Resource.Id.pager);
orientationChanged = false;
}
viewPager.Adapter = new PageAdapter(Element);
viewPager.SetCurrentItem(Element.Position, false);
// InterPageSpacing BP
var metrics = Resources.DisplayMetrics;
var interPageSpacing = Element.InterPageSpacing * metrics.Density;
viewPager.PageMargin = (int)interPageSpacing;
// BackgroundColor BP
viewPager.SetBackgroundColor(Element.BackgroundColor.ToAndroid());
viewPager.PageSelected += ViewPager_PageSelected;
viewPager.PageScrollStateChanged += ViewPager_PageScrollStateChanged;
viewPager.PageScrolled += ViewPager_PageScrolled;
// IsSwipeEnabled BP
SetIsSwipeEnabled();
// TapGestureRecognizer doesn't work when added to CarouselViewControl (Android) #66, #191, #200
((IViewPager)viewPager)?.SetElement(Element);
SetNativeControl(nativeView);
// ARROWS
SetArrows();
// INDICATORS
indicators = nativeView.FindViewById <CirclePageIndicator>(Resource.Id.indicator);
SetIndicators();
}
void SetNativeView()
{
var inflater = AViews.LayoutInflater.From(Forms.Context);
// Orientation BP
if (Element.Orientation == CarouselViewOrientation.Horizontal)
{
nativeView = inflater.Inflate(Resource.Layout.horizontal_viewpager, null);
}
else
{
nativeView = inflater.Inflate(Resource.Layout.vertical_viewpager, null);
}
viewPager = nativeView.FindViewById <ViewPager>(Resource.Id.pager);
viewPager.Adapter = new PageAdapter(Element);
viewPager.SetCurrentItem(Element.Position, false);
// InterPageSpacing BP
var metrics = Resources.DisplayMetrics;
var interPageSpacing = Element.InterPageSpacing * metrics.Density;
viewPager.PageMargin = (int)interPageSpacing;
// InterPageSpacingColor BP
viewPager.SetBackgroundColor(Element.InterPageSpacingColor.ToAndroid());
// IsSwipingEnabled BP
SetIsSwipingEnabled();
// INDICATORS
indicators = nativeView.FindViewById <CirclePageIndicator>(Resource.Id.indicator);
SetPosition();
indicators.SetViewPager(viewPager);
// IndicatorsTintColor BP
indicators.SetFillColor(Element.IndicatorsTintColor.ToAndroid());
// CurrentPageIndicatorTintColor BP
indicators.SetPageColor(Element.CurrentPageIndicatorTintColor.ToAndroid());
// IndicatorsShape BP
indicators.SetStyle(Element.IndicatorsShape); // Rounded or Squared
// ShowIndicators BP
indicators.Visibility = Element.ShowIndicators ? AViews.ViewStates.Visible : AViews.ViewStates.Gone;
viewPager.PageSelected += ViewPager_PageSelected;
viewPager.PageScrollStateChanged += ViewPager_PageScrollStateChanged;
SetNativeControl(nativeView);
}
void SetNativeView()
{
CleanUpViewPager();
var inflater = AViews.LayoutInflater.From(Forms.Context);
// Orientation BP
if (Element.Orientation == CarouselViewOrientation.Horizontal)
{
nativeView = inflater.Inflate(Resource.Layout.horizontal_viewpager, null);
}
else
{
nativeView = inflater.Inflate(Resource.Layout.vertical_viewpager, null);
}
viewPager = nativeView.FindViewById <ViewPager>(Resource.Id.pager);
viewPager.Adapter = new PageAdapter(Element);
viewPager.SetCurrentItem(Element.Position, false);
// InterPageSpacing BP
var metrics = Resources.DisplayMetrics;
var interPageSpacing = Element.InterPageSpacing * metrics.Density;
viewPager.PageMargin = (int)interPageSpacing;
// BackgroundColor BP
viewPager.SetBackgroundColor(Element.BackgroundColor.ToAndroid());
viewPager.PageSelected += ViewPager_PageSelected;
viewPager.PageScrollStateChanged += ViewPager_PageScrollStateChanged;
// IsSwipingEnabled BP
SetIsSwipingEnabled();
SetNativeControl(nativeView);
// INDICATORS
indicators = nativeView.FindViewById <CirclePageIndicator>(Resource.Id.indicator);
SetIndicators();
}
void CleanUpViewPager()
{
if (indicators != null)
{
indicators.Dispose();
indicators = null;
}
if (viewPager != null)
{
viewPager.PageSelected -= ViewPager_PageSelected;
viewPager.PageScrollStateChanged -= ViewPager_PageScrollStateChanged;
if (viewPager.Adapter != null)
{
viewPager.Adapter.Dispose();
}
viewPager.Dispose();
viewPager = null;
}
}
protected override void OnElementChanged(ElementChangedEventArgs <CarouselViewControl> e)
{
base.OnElementChanged(e);
if (Control == null)
{
// Instantiate the native control and assign it to the Control property with
// the SetNativeControl method
var inflater = AViews.LayoutInflater.From(Forms.Context);
if (Element.Orientation == Orientation.Horizontal)
{
nativeView = inflater.Inflate(Resource.Layout.viewpager, null);
}
else
{
nativeView = inflater.Inflate(Resource.Layout.vertical_viewpager, null);
}
var metrics = Resources.DisplayMetrics;
var interPageSpacing = Element.InterPageSpacing * metrics.Density;
viewPager = nativeView.FindViewById <ViewPager>(Resource.Id.pager);
viewPager.PageMargin = (int)interPageSpacing;
indicator = nativeView.FindViewById <CirclePageIndicator>(Resource.Id.indicator);
indicator.SetViewPager(viewPager);
indicator.SetPageColor(Element.PageIndicatorTintColor.ToAndroid());
indicator.SetFillColor(Element.CurrentPageIndicatorTintColor.ToAndroid());
indicator.Visibility = Element.ShowIndicators ? AViews.ViewStates.Visible : AViews.ViewStates.Gone;
SetNativeControl(nativeView);
}
if (e.OldElement != null)
{
// Unsubscribe from event handlers and cleanup any resources
if (viewPager != null)
{
viewPager.PageSelected -= ViewPager_PageSelected;
viewPager.PageScrollStateChanged -= ViewPager_PageScrollStateChanged;
}
if (Element != null)
{
Element.RemoveAction = null;
Element.InsertAction = null;
Element.SetCurrentAction = null;
}
}
if (e.NewElement != null)
{
// Configure the control and subscribe to event handlers
viewPager.PageSelected += ViewPager_PageSelected;
viewPager.PageScrollStateChanged += ViewPager_PageScrollStateChanged;
Element.RemoveAction = new Action <int>(RemoveItem);
Element.InsertAction = new Action <object, int>(InsertItem);
Element.SetCurrentAction = new Action <int>(SetCurrentItem);
}
}
