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SourceGit/UI/PopupManager.xaml.cs

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+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media.Animation;
+
+namespace SourceGit.UI {
+
+    /// <summary>
+    ///     Common popup manager.
+    /// </summary>
+    public partial class PopupManager : UserControl {
+        private static PopupManager instance = null;
+        private static bool locked = false;
+
+        /// <summary>
+        ///     Constructor.
+        /// </summary>
+        public PopupManager() {
+            instance = this;
+            InitializeComponent();
+        }
+
+        /// <summary>
+        ///     Show content as popup.
+        /// </summary>
+        /// <param name="elem"></param>
+        public static void Show(UIElement elem) {
+            if (instance == null || locked) return;
+
+            var gone = new Thickness(0, -(double)elem.GetValue(HeightProperty) - 16, 0, 0);
+
+            ThicknessAnimation anim = new ThicknessAnimation();
+            anim.Duration = TimeSpan.FromMilliseconds(150);
+            anim.From = gone;
+            anim.To = new Thickness(0);
+
+            instance.popupContent.Child = elem;
+            instance.popupContent.Margin = gone;
+            instance.Visibility = Visibility.Visible;
+            instance.popupContent.BeginAnimation(MarginProperty, anim);
+        }
+
+        /// <summary>
+        ///     Is current locked.
+        /// </summary>
+        /// <returns></returns>
+        public static bool IsLocked() {
+            return locked;
+        }
+
+        /// <summary>
+        ///     Lock
+        /// </summary>
+        public static void Lock() {
+            locked = true;
+        }
+
+        /// <summary>
+        ///     Unlock
+        /// </summary>
+        public static void Unlock() {
+            locked = false;
+        }
+
+        /// <summary>
+        ///     Close current popup.
+        /// </summary>
+        /// <param name="unlockFirst"></param>
+        public static void Close(bool unlockFirst = false) {
+            if (instance == null) return;
+            if (instance.popupContent.Child == null) return;
+            if (locked && !unlockFirst) return;
+            locked = false;
+
+            ThicknessAnimation anim = new ThicknessAnimation();
+            anim.Duration = TimeSpan.FromMilliseconds(150);
+            anim.From = new Thickness(0);
+            anim.To = new Thickness(0, -(double)instance.popupContent.Child.GetValue(HeightProperty) - 16, 0, 0);
+            anim.Completed += (obj, ev) => {
+                instance.Visibility = Visibility.Collapsed;
+                instance.popupContent.Child = null;
+            };
+            instance.popupContent.BeginAnimation(MarginProperty, anim);
+        }
+
+        /// <summary>
+        ///     Close by click blank area. 
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void Close(object sender, RoutedEventArgs e) {
+            Close();
+        }
+    }
+}