Initial version.

TINKLib/ViewModel/Info/BikeInfo/BikeInfoCarouseltemViewModel.cs

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+using System;
+using System.Windows.Input;
+using Xamarin.Forms;
+
+namespace TINK.ViewModel.Info.BikeInfo
+{
+    public class CourouselPageItemViewModel
+    {
+        public CourouselPageItemViewModel(
+            string p_strTitle,
+            string p_strLegend,
+            int p_iCurrentPageIndex,
+            Func<int> p_iPagesCountProvider,
+            Action p_oCloseAction,
+            ImageSource image = null)
+        {
+            Title = p_strTitle;
+            IsImageVisble = image != null;
+            if (IsImageVisble)
+            {
+                Image = image;
+            }
+
+            DescriptionText = p_strLegend;
+            CurrentPageIndex = p_iCurrentPageIndex;
+            PagesCountProvider = p_iPagesCountProvider;
+            CloseAction = p_oCloseAction;
+        }
+
+        /// <summary> Gets the title of the navigation page. </summary>
+        public string Title { get; }
+
+        public bool IsImageVisble { get; }
+
+        /// <summary> Gets the image. </summary>
+        public ImageSource Image { get; }
+
+        /// <summary> Gets the text which describes the image. </summary>
+        public string DescriptionText { get; }
+
+        /// <summary> Get the progress of the carousselling progress.</summary>
+        public double ProgressValue
+        {
+            get
+            {
+                var l_oCount = PagesCountProvider();
+
+               return l_oCount > 0 ? (double)CurrentPageIndex / l_oCount : 0;
+            }
+        }
+
+        /// <summary> Gets if user can leave carousel page.</summary>
+        public bool IsCloseVisible
+        {
+            get
+            {
+                return PagesCountProvider() == CurrentPageIndex;
+            }
+        }
+
+        /// <summary>
+        /// Commang object to bind login button to view model.
+        /// </summary>
+        public ICommand OnCloseRequest
+        {
+            get
+            {
+                return new Command(() => CloseAction());
+            }
+        }
+
+        /// <summary> Returns one based index of the current page. </summary>
+        private int CurrentPageIndex { get;  }
+
+        /// <summary> Gets the count of carousel pages. </summary>
+        private Func<int> PagesCountProvider { get; }
+
+        /// <summary> Action to actuate when close is invoked. </summary>
+        private Action CloseAction { get; }
+    }
+}