filter conditions

Billing.Shared/UI/BillingPage.cs

@@ -8,6 +8,8 @@ namespace Billing.UI
     {
         public event EventHandler Loaded;
 
+        private bool loaded;
+
         public BillingPage()
         {
             SetDynamicResource(BackgroundColorProperty, BaseTheme.WindowBackgroundColor);
@@ -18,5 +20,14 @@ namespace Billing.UI
         {
             Loaded?.Invoke(this, EventArgs.Empty);
         }
+
+        public void TriggerLoad()
+        {
+            if (!loaded)
+            {
+                loaded = true;
+                OnLoaded();
+            }
+        }
     }
 }

Billing.Shared/UI/ColorPicker.cs

@@ -8,15 +8,19 @@ namespace Billing.UI
 {
     public class ColorPicker : SKCanvasView
     {
-        public static readonly BindableProperty ColorProperty = BindableProperty.Create(nameof(Color), typeof(Color), typeof(ColorPicker));
+        public static readonly BindableProperty ColorProperty = Helper.Create<Color, ColorPicker>(nameof(Color));
+        public static readonly BindableProperty CommandProperty = Helper.Create<Command, ColorPicker>(nameof(Command));
 
         public Color Color
         {
             get => (Color)GetValue(ColorProperty);
             set => SetValue(ColorProperty, value);
         }
-
-        public event EventHandler<Color> ColorChanged;
+        public Command Command
+        {
+            get => (Command)GetValue(CommandProperty);
+            set => SetValue(CommandProperty, value);
+        }
 
         private SKPoint? lastTouch;
 
@@ -116,7 +120,7 @@ namespace Billing.UI
 
                 var color = touchColor.ToFormsColor();
                 Color = color;
-                ColorChanged?.Invoke(this, color);
+                Command?.Execute(color);
             }
         }
 
@@ -126,8 +130,8 @@ namespace Billing.UI
             lastTouch = e.Location;
 
             var size = CanvasSize;
-            if ((e.Location.X > 0 && e.Location.X < size.Width) &&
-                (e.Location.Y > 0 && e.Location.Y < size.Height))
+            if (e.Location.X > 0 && e.Location.X < size.Width &&
+                e.Location.Y > 0 && e.Location.Y < size.Height)
             {
                 e.Handled = true;
                 InvalidateSurface();

Billing.Shared/UI/Definition.cs

@@ -92,6 +92,12 @@ namespace Billing.UI
             var result = await page.DisplayActionSheet(message, Resource.No, yes);
             return result == yes;
         }
+
+        public static DateTime LastMoment(this DateTime date)
+        {
+            // add 23:59:59.999...
+            return date.AddTicks(863999999999);
+        }
     }
 
     public static class ModelExtensionHelper