Merge branch 'master' of https://github.com/HandyOrg/HandyControl into upstream-master

src/Shared/HandyControl_Shared/Controls/Other/Sprite.cs

@@ -0,0 +1,64 @@
+using System.Windows;
+using System.Windows.Input;
+
+namespace HandyControl.Controls
+{
+    public sealed class Sprite : System.Windows.Window
+    {
+        private bool _isLeftButtonPressed;
+
+        private double _leftMax;
+
+        private double _topMax;
+
+        private Sprite()
+        {
+            WindowStyle = WindowStyle.None;
+            AllowsTransparency = true;
+            InputManager.Current.PostProcessInput += Current_PostProcessInput;
+        }
+
+        private void Current_PostProcessInput(object sender, ProcessInputEventArgs e)
+        {
+            if (Mouse.LeftButton == MouseButtonState.Pressed)
+            {
+                _isLeftButtonPressed = true;
+            }
+            else if(_isLeftButtonPressed)
+            {
+                if (Left < 0)
+                {
+                    Left = 0;
+                }
+
+                if (Left > _leftMax)
+                {
+                    Left = _leftMax;
+                }
+
+                if (Top > _topMax)
+                {
+                    Top = _topMax;
+                }
+            }
+        }
+
+        public static Sprite Show(object content)
+        {
+            var sprite = new Sprite
+            {
+                Content = content
+            };
+
+            sprite.Show();
+
+            var desktopWorkingArea = SystemParameters.WorkArea;
+            sprite._leftMax = desktopWorkingArea.Width - sprite.ActualWidth;
+            sprite._topMax = desktopWorkingArea.Height - sprite.ActualHeight;
+            sprite.Left = sprite._leftMax - 50;
+            sprite.Top = 50 - sprite.Padding.Top;
+
+            return sprite;
+        }
+    }
+}