private static void RecycleSubviews(this ShowCase materialShowcase)
{
foreach (var subview in materialShowcase.Subviews)
{
subview.RemoveFromSuperview();
}
}
public static void AddInstructionView(this ShowCase materialShowcase, CGPoint atCenter)
{
materialShowcase.instructionView = new ShowCaseInstructionView();
materialShowcase.instructionView.text = materialShowcase.config.ViewText;
// Calculate x position
float xPosition = ShowCase.LabelMargin;
// Calculate y position
float yPosition;
if (materialShowcase.config.TextVerticalPosition != VerticalPosition.Top)
{
yPosition = (float)atCenter.Y + ShowCase.TextCenterOffset;
}
else
{
yPosition = (float)atCenter.Y - ShowCase.TextCenterOffset - ShowCase.LabelDefaultHeight * 2;
}
materialShowcase.instructionView.Frame = new CGRect(
xPosition,
yPosition,
materialShowcase.containerView.Frame.Width - (xPosition + xPosition),
(materialShowcase.containerView.Frame.Height / 2));
materialShowcase.AddSubview(materialShowcase.instructionView);
}
public void AddOverlay(View onView, ShowCaseConfig config)
{
_showCase = new ShowCase();
_showCase.SetTargetView(GetOrCreateRenderer(onView).NativeView);
_showCase.InitConfig(config);
_showCase.Show();
}
public static void Show(this ShowCase materialShowcase)
{
materialShowcase.InitViews();
materialShowcase.BackgroundColor = UIColor.Black;
materialShowcase.Alpha = .2f;
materialShowcase.containerView.AddSubview(materialShowcase);
materialShowcase.LayoutIfNeeded();
materialShowcase.AddGestureRecognizer(new UITapGestureRecognizer(() => Hide(materialShowcase)));
}
public void HideOverlay()
{
if (_showCase != null)
{
_showCase.Hide();
}
_showCase = null;
}
public static void SetDefaultProperties(this ShowCase materialShowcase)
{
// Background
materialShowcase.backgroundPromptColor = ShowCase.BackgroundDefaultColor;
materialShowcase.backgroundPromptColorAlpha = ShowCase.BackgroundAlpha;
// Target view
materialShowcase.targetTintColor = ShowCase.BackgroundDefaultColor;
materialShowcase.targetHolderColor = ShowCase.TargetHolderColor;
materialShowcase.targetHolderRadius = ShowCase.TargetHolderRadius;
}
public static void Configure(this ShowCase materialShowcase)
{
materialShowcase.BackgroundColor = UIColor.Clear;
var window = UIApplication.SharedApplication.Delegate?.GetWindow();
if (window != null)
{
materialShowcase.containerView = window;
materialShowcase.SetDefaultProperties();
}
}
public static void InitViews(this ShowCase materialShowcase)
{
var center = materialShowcase.CalculateCenter(materialShowcase.targetView, materialShowcase.containerView);
materialShowcase.AddTarget(center);
materialShowcase.AddInstructionView(center);
materialShowcase.instructionView.LayoutIfNeeded();
foreach (var subView in materialShowcase.Subviews)
{
subView.UserInteractionEnabled = false;
}
}
/// Create a copy view of target view
/// It helps us not to affect the original target view
public static void AddTarget(this ShowCase materialShowcase, CGPoint atCenter)
{
materialShowcase.targetCopyView = materialShowcase.targetView.SnapshotView(true);
var width = materialShowcase.targetCopyView.Frame.Width;
var height = materialShowcase.targetCopyView.Frame.Height;
materialShowcase.targetCopyView.Frame = new CGRect(0, 0, width, height);
materialShowcase.targetCopyView.Center = atCenter;
materialShowcase.targetCopyView.TranslatesAutoresizingMaskIntoConstraints = true;
materialShowcase.targetCopyView.Frame = RectangleFExtensions.Inset(materialShowcase.targetCopyView.Frame, -5f, -5f);
materialShowcase.targetCopyView.Layer.BorderColor = UIColor.White.CGColor;
materialShowcase.targetCopyView.Layer.BorderWidth = 5f;
materialShowcase.AddSubview(materialShowcase.targetCopyView);
}
// Calculates the center point based on targetview
public static CGPoint CalculateCenter(this ShowCase materialShowcase, UIView targetView, UIView containerView)
{
var targetRect = targetView.ConvertRectToCoordinateSpace(targetView.Bounds, containerView);
return(targetRect.Center());
}
public static void Hide(this ShowCase showCase)
{
showCase.RecycleSubviews();
showCase.RemoveFromSuperview();
}
public static void InitConfig(this ShowCase materialShowcase, ShowCaseConfig showCaseConfig)
{
materialShowcase.config = showCaseConfig;
}
/// Sets a general UIView as target
public static void SetTargetView(this ShowCase materialShowcase, UIView view)
{
materialShowcase.targetView = view;
}