Work in progress on interactive tooltips as well as tooltip/popup unification. This is currently a bit of a mess...

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/Interop/WindowMessageSink.cs

@@ -25,7 +25,6 @@
 using System;
 using System.ComponentModel;
 using System.Diagnostics;
-using System.Runtime.InteropServices;
 
 namespace Hardcodet.Wpf.TaskbarNotification.Interop
 {
@@ -290,10 +289,12 @@ namespace Hardcodet.Wpf.TaskbarNotification.Interop
                     MouseEventReceived(MouseEvent.BalloonToolTipClicked);
                     break;
 
+                //show ToolTip
                 case 0x406:
                     ChangeToolTipStateRequest(true);
                     break;
 
+                //hide ToolTip
                 case 0x407:
                     ChangeToolTipStateRequest(false);
                     break;

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/NotifyIconWpf.csproj

@@ -53,6 +53,7 @@
     <Compile Include="Interop\Point.cs" />
     <Compile Include="Interop\WindowClass.cs" />
     <Compile Include="PopupActivationMode.cs" />
+    <Compile Include="PopupHandler.cs" />
     <Compile Include="RoutedEventHelper.cs" />
     <Compile Include="Interop\WinApi.cs" />
     <Compile Include="Interop\MouseEvent.cs" />
@@ -68,6 +69,7 @@
     </Compile>
     <Compile Include="TaskbarIcon.cs" />
     <Compile Include="TaskbarIcon.Declarations.cs" />
+    <Compile Include="ToolTipObserver.cs" />
     <Compile Include="Util.cs" />
     <None Include="Diagrams\TaskbarIcon Overview.cd" />
     <AppDesigner Include="Properties\" />

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/PopupActivationMode.cs

@@ -70,6 +70,17 @@ namespace Hardcodet.Wpf.TaskbarNotification
         /// <summary>
         /// The item is displayed whenever a click occurs.
         /// </summary>
+        AnyClick,
+
+        /// <summary>
+        /// The mouse is hovering over the Notify Icon (ToolTip behavior).
+        /// </summary>
+        Hover,
+
+        /// <summary>
+        /// The item is displayed whenever a click occurs, or the mouse hovers
+        /// over the icon (ToolTip behavior).
+        /// </summary>
         All
     }
 }

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/PopupHandler.cs

@@ -0,0 +1,344 @@
+using System;
+using System.Diagnostics;
+using System.Windows;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
+using System.Windows.Input;
+using System.Windows.Interop;
+using System.Windows.Threading;
+using Hardcodet.Wpf.TaskbarNotification.Interop;
+
+namespace Hardcodet.Wpf.TaskbarNotification
+{
+
+    public class PopupSetting : DependencyObject
+    {
+        #region Trigger
+
+        /// <summary>
+        /// Trigger Dependency Property
+        /// </summary>
+        public static readonly DependencyProperty TriggerProperty =
+            DependencyProperty.Register("Trigger", typeof(PopupActivationMode), typeof(PopupSetting),
+                new FrameworkPropertyMetadata((PopupActivationMode)PopupActivationMode.AnyClick));
+
+        /// <summary>
+        /// Gets or sets the Trigger property. This dependency property 
+        /// indicates ....
+        /// </summary>
+        public PopupActivationMode Trigger
+        {
+            get { return (PopupActivationMode)GetValue(TriggerProperty); }
+            set { SetValue(TriggerProperty, value); }
+        }
+
+        #endregion
+
+
+        
+        #region PreviewOpen
+
+        /// <summary>
+        /// PreviewOpen Routed Event
+        /// </summary>
+        public static readonly RoutedEvent PreviewOpenEvent = EventManager.RegisterRoutedEvent("PreviewOpen",
+            RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(PopupSetting));
+
+        /// <summary>
+        /// Occurs when ...
+        /// </summary>
+        public event RoutedEventHandler PreviewOpen
+        {
+            add { RoutedEventHelper.AddHandler(this, PreviewOpenEvent, value); }
+            remove { RoutedEventHelper.RemoveHandler(this, PreviewOpenEvent, value); }
+        }
+
+        /// <summary>
+        /// A helper method to raise the PreviewOpen event.
+        /// </summary>
+        protected RoutedEventArgs RaisePreviewOpenEvent()
+        {
+            return RaisePreviewOpenEvent(this);
+        }
+
+        /// <summary>
+        /// A static helper method to raise the PreviewOpen event on a target element.
+        /// </summary>
+        /// <param name="target">UIElement or ContentElement on which to raise the event</param>
+        internal static RoutedEventArgs RaisePreviewOpenEvent(DependencyObject target)
+        {
+            if (target == null) return null;
+
+            RoutedEventArgs args = new RoutedEventArgs();
+            args.RoutedEvent = PreviewOpenEvent;
+            RoutedEventHelper.RaiseEvent(target, args);
+            return args;
+        }
+
+        #endregion
+        
+    }
+
+    /// <summary>
+    /// Maintains a given popup, and optionally tracks activation / closing.
+    /// </summary>
+    public class PopupHandler
+    {
+        public FrameworkElement Parent { get; private set; }
+        public DispatcherTimer Timer { get; private set; }
+
+        private Action scheduledTimerAction;
+        private Popup managedPopup;
+
+        /// <summary>
+        /// Indicates whether the popup is being activated if the
+        /// user enters the mouse.
+        /// </summary>
+        public bool ActivateOnMouseEnterPopup { get; set; }
+
+        /// <summary>
+        /// Indicates whether the popup is being deactivated if the
+        /// user leaves the popup. Can be set to false in order to
+        /// keep a popup open indefinitely once the user hovered
+        /// over it. Defaults to <c>true</c>.
+        /// </summary>
+        public bool CloseOnMouseLeavePopup { get; set; }
+
+        public Popup ManagedPopup
+        {
+            get { return managedPopup; }
+            set
+            {
+                ResetSchedule();
+
+                var oldPopup = managedPopup;
+                managedPopup = value;
+                InitPopup(oldPopup);
+            }
+        }
+
+        public Func<bool> PreviewOpenFunc { get; set; }
+        public Action PostOpenAction { get; set; }
+
+        public Func<bool> PreviewCloseFunc { get; set; }
+        public Action PostCloseAction { get; set; }
+
+        public int OpenPopupDelay { get; set; }
+        public int ClosePopupDelay { get; set; }
+
+        public PopupHandler(FrameworkElement parent)
+        {
+            Parent = parent;
+            Timer = new DispatcherTimer(DispatcherPriority.Normal, parent.Dispatcher);
+            Timer.Tick += OnTimerElapsed;
+            CloseOnMouseLeavePopup = true;
+        }
+
+
+        private void InitPopup(Popup oldPopup)
+        {
+            if (oldPopup != null)
+            {
+                oldPopup.MouseEnter -= OnPopupMouseEnter;
+                oldPopup.MouseLeave -= OnPopupMouseLeave;
+            }
+
+            if (ManagedPopup == null) return;
+
+            ManagedPopup.MouseEnter += OnPopupMouseEnter;
+            ManagedPopup.MouseLeave += OnPopupMouseLeave;
+
+            //hook up the popup with the data context of it's associated object
+            //in case we have content with bindings
+            var binding = new Binding
+            {
+                Path = new PropertyPath(FrameworkElement.DataContextProperty),
+                Mode = BindingMode.OneWay,
+                Source = Parent
+            };
+            BindingOperations.SetBinding(ManagedPopup, FrameworkElement.DataContextProperty, binding);
+
+            //force template application so we can switch visual states
+            var fe = ManagedPopup.Child as FrameworkElement;
+            if (fe != null)
+            {
+                fe.ApplyTemplate();
+                GoToState("Closed", false);
+            }
+        }
+
+
+        public void ShowPopup()
+        {
+            Debug.WriteLine("show popup request");
+
+            if (ManagedPopup == null) return;
+
+            //if the popup is still open, open it immediatly
+            if (ManagedPopup.IsOpen)
+            {
+                //the popup is already open (maybe was scheduled to close)
+                //-> abort schedule, set back to active state
+                ResetSchedule();
+                GoToState("Showing");
+            }
+            else
+            {
+                //validate whether we can open
+                bool isHandled = PreviewOpenFunc();
+                if (isHandled) return;
+
+                Schedule(OpenPopupDelay, () =>
+                {
+                    Debug.WriteLine("showing popup");
+
+                    //Open the popup, then start transition
+                    ManagedPopup.IsOpen = true;
+                    GoToState("Showing");
+
+                    FocusPopup();
+
+                    PostOpenAction();
+                });
+            }
+        }
+
+        /// <summary>
+        /// Schedules closing the maintained popup, if it is currently open, using
+        /// the configured <see cref="ClosePopupDelay"/>, if set.
+        /// </summary>
+        public void ScheduleClosePopup()
+        {
+            Debug.WriteLine("close request");
+
+            if (ManagedPopup == null || !ManagedPopup.IsOpen) return;
+
+            //validate whether we can close
+            bool isHandled = PreviewCloseFunc();
+            if (isHandled) return;
+
+            //start hiding immediately
+            GoToState("Hiding");
+
+            Schedule(ClosePopupDelay, () =>
+            {
+                Debug.WriteLine("Close request scheduled");
+                GoToState("Closed");
+                ManagedPopup.IsOpen = false;
+                PostCloseAction();
+            });
+        }
+
+        /// <summary>
+        /// Suppresses a scheduled hiding of the popup, and transitions the content
+        /// back into active state.
+        /// </summary>
+        private void OnPopupMouseEnter(object sender, MouseEventArgs e)
+        {
+            if (!ActivateOnMouseEnterPopup) return;
+
+            Debug.WriteLine("popup enter");
+
+            //the popup is still open - just supress any scheduled action
+            ResetSchedule();
+            GoToState("Active");
+        }
+
+
+        /// <summary>
+        /// Schedules hiding of the control if the user moves away from an interactive popup.
+        /// </summary>
+        private void OnPopupMouseLeave(object sender, MouseEventArgs e)
+        {
+            if (!CloseOnMouseLeavePopup) return;
+
+            Debug.WriteLine("mouse leave");
+            ScheduleClosePopup();
+        }
+
+        /// <summary>
+        /// Performs a pending action.
+        /// </summary>
+        private void OnTimerElapsed(object sender, EventArgs eventArgs)
+        {
+            lock (Timer)
+            {
+                Timer.Stop();
+
+                var action = scheduledTimerAction;
+                scheduledTimerAction = null;
+
+                //cache action and set timer action to null before invoking it, not the other way around
+                //(that action could cause the timer action to be reassigned)
+                if (action != null)
+                {
+                    action();
+                }
+            }
+        }
+
+        private void ResetSchedule()
+        {
+            lock (Timer)
+            {
+                Timer.Stop();
+                scheduledTimerAction = null;
+            }
+        }
+
+        /// <summary>
+        /// Schedules an action to be executed on the next timer tick. Resets the timer
+        /// and replaces any other pending action.
+        /// </summary>
+        /// <remarks>
+        /// Customize this if you need custom delays to show / hide / fade tooltips by
+        /// simply changing the timer interval depending on the state change.
+        /// </remarks>
+        private void Schedule(int delay, Action action)
+        {
+            lock (Timer)
+            {
+                Timer.Stop();
+
+                if (delay == 0)
+                {
+                    //if there is no delay, execute action immediately
+                    scheduledTimerAction = null;
+                    action();
+                }
+                else
+                {
+                    Timer.Interval = TimeSpan.FromMilliseconds(delay);
+                    scheduledTimerAction = action;
+                    Timer.Start();
+                }
+            }
+        }
+
+        private void GoToState(string stateName, bool useTransitions = true)
+        {
+            var fe = ManagedPopup.Child as FrameworkElement;
+            if (fe == null) return;
+
+            VisualStateManager.GoToState(fe, stateName, useTransitions);
+        }
+
+        private void FocusPopup()
+        {
+            IntPtr handle = IntPtr.Zero;
+            if (ManagedPopup.Child != null)
+            {
+                //try to get a handle on the popup itself (via its child)
+                HwndSource source = (HwndSource)PresentationSource.FromVisual(ManagedPopup.Child);
+                if (source != null) handle = source.Handle;
+            }
+
+            //TODO if we don't have a handle for the popup, fall back to the message sink
+            //if (handle == IntPtr.Zero) handle = notifyIcon.messageSink.MessageWindowHandle;
+
+            //activate either popup or message sink to track deactivation.
+            //otherwise, the popup does not close if the user clicks somewhere else
+            WinApi.SetForegroundWindow(handle);
+        }
+    }
+}

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/TaskbarIcon.Declarations.cs

@@ -96,7 +96,7 @@ namespace Hardcodet.Wpf.TaskbarNotification
         /// TrayToolTipResolved Read-Only Dependency Property
         /// </summary>
         private static readonly DependencyPropertyKey TrayToolTipResolvedPropertyKey
-            = DependencyProperty.RegisterReadOnly("TrayToolTipResolved", typeof (ToolTip), typeof (TaskbarIcon),
+            = DependencyProperty.RegisterReadOnly("TrayToolTipResolved", typeof(Popup), typeof(TaskbarIcon),
                 new FrameworkPropertyMetadata(null));
 
 
@@ -116,9 +116,9 @@ namespace Hardcodet.Wpf.TaskbarNotification
         [Category(CategoryName)]
         [Browsable(true)]
         [Bindable(true)]
-        public ToolTip TrayToolTipResolved
+        public Popup TrayToolTipResolved
         {
-            get { return (ToolTip) GetValue(TrayToolTipResolvedProperty); }
+            get { return (Popup)GetValue(TrayToolTipResolvedProperty); }
         }
 
         /// <summary>
@@ -126,7 +126,7 @@ namespace Hardcodet.Wpf.TaskbarNotification
         /// property.  
         /// </summary>
         /// <param name="value">The new value for the property.</param>
-        protected void SetTrayToolTipResolved(ToolTip value)
+        protected void SetTrayToolTipResolved(Popup value)
         {
             SetValue(TrayToolTipResolvedPropertyKey, value);
         }
@@ -304,7 +304,7 @@ namespace Hardcodet.Wpf.TaskbarNotification
             //do not touch tooltips if we have a custom tooltip element
             if (TrayToolTip == null)
             {
-                ToolTip currentToolTip = TrayToolTipResolved;
+                Popup currentToolTip = TrayToolTipResolved;
                 if (currentToolTip == null)
                 {
                     //if we don't have a wrapper tooltip for the tooltip text, create it now
@@ -313,7 +313,7 @@ namespace Hardcodet.Wpf.TaskbarNotification
                 else
                 {
                     //if we have a wrapper tooltip that shows the old tooltip text, just update content
-                    currentToolTip.Content = e.NewValue;
+                    currentToolTip.Child = new ContentControl {Content = e.NewValue}; //TODO hackery
                 }
             }
 
@@ -375,7 +375,7 @@ namespace Hardcodet.Wpf.TaskbarNotification
         /// <param name="e">Provides information about the updated property.</param>
         private void OnTrayToolTipPropertyChanged(DependencyPropertyChangedEventArgs e)
         {
-            //recreate tooltip control
+            //recreate tooltip popup
             CreateCustomToolTip();
 
             if (e.OldValue != null)
@@ -388,6 +388,8 @@ namespace Hardcodet.Wpf.TaskbarNotification
             {
                 //set this taskbar icon as a reference to the new tooltip element
                 SetParentTaskbarIcon((DependencyObject) e.NewValue, this);
+
+                TrayToolTip.IsHitTestVisible = IsToolTipInteractive;
             }
 
             //update tooltip settings - needed to make sure a string is set, even
@@ -398,6 +400,37 @@ namespace Hardcodet.Wpf.TaskbarNotification
 
         #endregion
 
+        #region IsToolTipInteractive
+        
+        public static readonly DependencyProperty IsToolTipInteractiveProperty =
+            DependencyProperty.Register("IsToolTipInteractive", typeof(bool), typeof(TaskbarIcon),
+                new FrameworkPropertyMetadata(true, OnIsToolTipInteractiveChanged));
+
+        [Bindable(true)]
+        [Category(CategoryName)]
+        [DisplayName("Clickable ToolTip")]
+        [Description("Whether the ToolTip can be selected / clicked on.")]
+        public bool IsToolTipInteractive
+        {
+            get { return (bool)GetValue(IsToolTipInteractiveProperty); }
+            set { SetValue(IsToolTipInteractiveProperty, value); }
+        }
+
+        /// <summary>
+        /// Handles changes to the IsToolTipInteractive property.
+        /// </summary>
+        private static void OnIsToolTipInteractiveChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var target = (TaskbarIcon)d;
+
+            if (target.TrayToolTip != null)
+            {
+                target.TrayToolTip.IsHitTestVisible = target.IsToolTipInteractive;
+            }
+        }
+
+        #endregion
+
         #region TrayPopup dependency property
 
         /// <summary>

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/TaskbarIcon.cs

@@ -29,6 +29,7 @@ using System.Threading;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
+using System.Windows.Data;
 using System.Windows.Interop;
 using System.Windows.Threading;
 using Hardcodet.Wpf.TaskbarNotification.Interop;
@@ -67,6 +68,11 @@ namespace Hardcodet.Wpf.TaskbarNotification
         /// </summary>
         private readonly Timer singleClickTimer;
 
+        /// <summary>
+        /// Maintains opened tooltip popups.
+        /// </summary>
+        private ToolTipObserver toolTipObserver;
+
         /// <summary>
         /// A timer that is used to close open balloon tooltips.
         /// </summary>
@@ -466,21 +472,23 @@ namespace Hardcodet.Wpf.TaskbarNotification
         private void OnToolTipChange(bool visible)
         {
             //if we don't have a tooltip, there's nothing to do here...
-            if (TrayToolTipResolved == null) return;
+            //if (TrayToolTipResolved == null) return;
 
             if (visible)
             {
-                if (IsPopupOpen)
+                if (IsPopupOpen) //TODO return if IsEnabled is  false
                 {
                     //ignore if we are already displaying something down there
                     return;
                 }
 
                 var args = RaisePreviewTrayToolTipOpenEvent();
+
+                //if the user handled the event by herself, we're done
                 if (args.Handled) return;
 
-                TrayToolTipResolved.IsOpen = true;
-
+                toolTipObserver.ShowToolTip();
+                
                 //raise attached event first
                 if (TrayToolTip != null) RaiseToolTipOpenedEvent(TrayToolTip);
 
@@ -493,11 +501,16 @@ namespace Hardcodet.Wpf.TaskbarNotification
                 if (args.Handled) return;
 
                 //raise attached event first
-                if (TrayToolTip != null) RaiseToolTipCloseEvent(TrayToolTip);
+                if (TrayToolTip != null) RaiseToolTipCloseEvent(TrayToolTip); //TODO this must be fired with a delay once the observer really closed it!
 
-                TrayToolTipResolved.IsOpen = false;
+                //TrayToolTipResolved.IsOpen = false;
+                if (!toolTipObserver.IsMouseOverToolTip)
+                {
+                    toolTipObserver.BeginCloseToolTip();
+                }
 
                 //bubble event
+                //TODO this must be fired with a delay once the observer really closed it!
                 RaiseTrayToolTipCloseEvent();
             }
         }
@@ -519,44 +532,64 @@ namespace Hardcodet.Wpf.TaskbarNotification
         private void CreateCustomToolTip()
         {
             //check if the item itself is a tooltip
-            ToolTip tt = TrayToolTip as ToolTip;
+            var popup = TrayToolTip as Popup;
 
-            if (tt == null && TrayToolTip != null)
+            if (popup == null && TrayToolTip != null)
             {
-                //create an invisible wrapper tooltip that hosts the UIElement
-                tt = new ToolTip();
-                tt.Placement = PlacementMode.Mouse;
+                //create an invisible popup that hosts the UIElement
+                popup = new Popup();
+                popup.AllowsTransparency = true;
+                
+                //don't animate by default - devs can use attached
+                //events or override
+                popup.PopupAnimation = PopupAnimation.None; //TODO make this configurable
+
+                //the CreateRootPopup method outputs binding errors in the debug window because
+                //it tries to bind to "Popup-specific" properties in case they are provided by the child.
+                //We don't need that so just assign the control as the child.
+                popup.Child = TrayToolTip;
 
                 //do *not* set the placement target, as it causes the popup to become hidden if the
                 //TaskbarIcon's parent is hidden, too. At runtime, the parent can be resolved through
                 //the ParentTaskbarIcon attached dependency property:
-                //tt.PlacementTarget = this;
+                //popup.PlacementTarget = this;
 
-                //make sure the tooltip is invisible
-                tt.HasDropShadow = false;
-                tt.BorderThickness = new Thickness(0);
-                tt.Background = System.Windows.Media.Brushes.Transparent;
-
-                //setting the 
-                tt.StaysOpen = true;
-                tt.Content = TrayToolTip;
+                popup.Placement = PlacementMode.Mouse;
             }
-            else if (tt == null && !String.IsNullOrEmpty(ToolTipText))
+            else if (popup == null && !String.IsNullOrEmpty(ToolTipText))
             {
-                //create a simple tooltip for the ToolTipText string
-                tt = new ToolTip();
-                tt.Content = ToolTipText;
+                //TODO create means to show a regular tooltip instead of this hackery
+                var toolTip = new ToolTip();
+                popup = new Popup(); //TODO hack
+                popup.ToolTip = toolTip;
+                toolTip.Content = ToolTipText;
+
+                //wire max width
+                var binding = new Binding
+                {
+                    Path = new PropertyPath(Popup.IsOpenProperty),
+                    Mode = BindingMode.OneWay,
+                    Source = popup
+                };
+                BindingOperations.SetBinding(toolTip, System.Windows.Controls.ToolTip.IsOpenProperty, binding);
             }
 
             //the tooltip explicitly gets the DataContext of this instance.
             //If there is no DataContext, the TaskbarIcon assigns itself
-            if (tt != null)
+            if (popup != null)
             {
-                UpdateDataContext(tt, null, DataContext);
+                UpdateDataContext(popup, null, DataContext);
             }
 
             //store a reference to the used tooltip
-            SetTrayToolTipResolved(tt);
+            SetTrayToolTipResolved(popup);
+
+            if (popup != null)
+            {
+                //TODO that should just become a property setter on the observer, with null allowed
+                if(toolTipObserver == null) toolTipObserver = new ToolTipObserver(this, 500);
+                toolTipObserver.Popup = popup;
+            }
         }
 
 
@@ -666,20 +699,8 @@ namespace Hardcodet.Wpf.TaskbarNotification
                 //open popup
                 TrayPopupResolved.IsOpen = true;
 
-                IntPtr handle = IntPtr.Zero;
-                if (TrayPopupResolved.Child != null)
-                {
-                    //try to get a handle on the popup itself (via its child)
-                    HwndSource source = (HwndSource) PresentationSource.FromVisual(TrayPopupResolved.Child);
-                    if (source != null) handle = source.Handle;
-                }
-
-                //if we don't have a handle for the popup, fall back to the message sink
-                if (handle == IntPtr.Zero) handle = messageSink.MessageWindowHandle;
-
-                //activate either popup or message sink to track deactivation.
-                //otherwise, the popup does not close if the user clicks somewhere else
-                WinApi.SetForegroundWindow(handle);
+                //activate element
+                FocusElement(TrayPopupResolved);
 
                 //raise attached event - item should never be null unless developers
                 //changed the CustomPopup directly...
@@ -690,6 +711,29 @@ namespace Hardcodet.Wpf.TaskbarNotification
             }
         }
 
+
+        /// <summary>
+        /// Activates a given UI element.
+        /// </summary>
+        private void FocusElement(Popup popup)
+        {
+            IntPtr handle = IntPtr.Zero;
+            if (popup.Child != null)
+            {
+                //try to get a handle on the popup itself (via its child)
+                HwndSource source = (HwndSource)PresentationSource.FromVisual(popup.Child);
+                if (source != null) handle = source.Handle;
+            }
+
+            //if we don't have a handle for the popup, fall back to the message sink
+            if (handle == IntPtr.Zero) handle = messageSink.MessageWindowHandle;
+
+            //activate either popup or message sink to track deactivation.
+            //otherwise, the popup does not close if the user clicks somewhere else
+            WinApi.SetForegroundWindow(handle);
+
+        }
+
         #endregion
 
         #region Context Menu

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/ToolTipObserver.cs

@@ -0,0 +1,266 @@
+using System;
+using System.Diagnostics;
+using System.Windows;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
+using System.Windows.Input;
+using System.Windows.Interop;
+using System.Windows.Threading;
+using Hardcodet.Wpf.TaskbarNotification.Interop;
+
+namespace Hardcodet.Wpf.TaskbarNotification
+{
+    public enum CloseMode
+    {
+        /// <summary>
+        /// Popup is not closed manually.
+        /// </summary>
+        None,
+
+        OnLeavePopup,
+    }
+
+
+    /// <summary>
+    /// Maintains a currently displayed, optionally interactive "ToolTip" (which is infact a popup).
+    /// </summary>
+    internal class ToolTipObserver
+    {
+        private readonly TaskbarIcon notifyIcon;
+        private readonly DispatcherTimer timer;
+        private Action timerAction;
+
+        public Popup Popup
+        {
+            get { return popup; }
+            set
+            {
+                popup = value;
+                InitControls();
+            }
+        }
+
+        /// <summary>
+        /// Caches whether the mouse is currently over the popup. In that case, ignore
+        /// the notify's request to close the popup (leads into an endless open/close cycle).
+        /// </summary>
+        private bool isMouseOverPopup;
+
+        private Popup popup;
+
+        public bool IsMouseOverToolTip
+        {
+            //TODO replace with better call
+            get { return popup != null && popup.IsMouseOver; }
+        }
+
+
+
+
+        public ToolTipObserver(TaskbarIcon notifyIcon, int delay)
+        {
+            this.notifyIcon = notifyIcon;
+
+            timer = new DispatcherTimer(TimeSpan.FromMilliseconds(delay), DispatcherPriority.Normal, OnTimerElapsed, notifyIcon.Dispatcher);
+            timer.IsEnabled = false;
+
+            //EventManager.RegisterClassHandler(type, Mouse.MouseEnterEvent, (Delegate)new MouseEventHandler(UIElement.OnMouseEnterThunk), false);
+            //EventManager.RegisterClassHandler(type, Mouse.MouseLeaveEvent, (Delegate)new MouseEventHandler(UIElement.OnMouseLeaveThunk), false);
+        }
+
+        /// <summary>
+        /// Shows the popup. Typically invoked if the user hovers over the NotifyIcon.
+        /// </summary>
+        public void ShowToolTip()
+        {
+            Debug.WriteLine("show request from NI");
+
+            //don't do anything
+            if (!notifyIcon.IsEnabled) return; //TODO should move into the control, also for other operations
+
+            //if the popup is still open, open it immediatly
+            if (Popup != null && Popup.IsOpen)
+            {
+                Debug.WriteLine("show request scheduled");
+                Schedule(() => { }); //reset schedule
+                GoToState("Showing");
+            }
+            else
+            {
+                Schedule(() =>
+                {
+                    Debug.WriteLine("showing popup");
+                    Popup.IsOpen = true; //show, then transition
+                    GoToState("Showing");
+
+                    IntPtr handle = IntPtr.Zero;
+                    Popup ttPopup = notifyIcon.TrayToolTipResolved;
+                    if (ttPopup.Child != null)
+                    {
+                        //try to get a handle on the popup itself (via its child)
+                        HwndSource source = (HwndSource)PresentationSource.FromVisual(ttPopup.Child);
+                        if (source != null) handle = source.Handle;
+                    }
+
+                    //if we don't have a handle for the popup, fall back to the message sink
+                    //if (handle == IntPtr.Zero) handle = notifyIcon.messageSink.MessageWindowHandle;
+
+                    //activate either popup or message sink to track deactivation.
+                    //otherwise, the popup does not close if the user clicks somewhere else
+                    WinApi.SetForegroundWindow(handle);
+                });
+            }
+        }
+
+        /// <summary>
+        /// Transitions the popup into a closed state.
+        /// </summary>
+        public void BeginCloseToolTip()
+        {
+            Debug.WriteLine("close request from notify icon");
+
+            
+            //Popup.InputHitTest(p == null)
+
+            if (Popup.IsMouseOver)
+            {
+                Debug.WriteLine("ignoring close request since mouse is over tooltip");
+                return;
+            }
+
+            if (Popup == null) return;
+
+            //start fading immediately if animation is programmed that way
+            GoToState("Hiding");
+
+            Schedule(() =>
+            {
+                Debug.WriteLine("Close request scheduled");
+                GoToState("Closed");
+                Popup.IsOpen = false;
+            });
+        }
+
+
+
+        /// <summary>
+        /// Suppresses a scheduled hiding of the popup, and transitions the content
+        /// back into active state.
+        /// </summary>
+        private void OnPopupMouseEnter(object sender, MouseEventArgs e)
+        {
+            Debug.WriteLine("popup enter");
+
+            this.isMouseOverPopup = true;
+
+            timer.Stop(); //suppress any other actions
+            GoToState("Active"); //the popup is still open
+        }
+
+        
+        /// <summary>
+        /// Schedules hiding of the control if the user moves away from an interactive popup.
+        /// </summary>
+        private void OnPopupMouseLeave(object sender, MouseEventArgs e)
+        {
+            Debug.WriteLine("mouse leave");
+            this.isMouseOverPopup = false;
+
+            Schedule(() =>
+            {
+                Debug.WriteLine("mouse leave scheduler");
+
+                //start hiding immediately
+                GoToState("Hiding"); //switch with a delay when leaving the popup
+
+                Schedule(() =>
+                {
+                    Popup.IsOpen = false;
+                }); //close with yet another delay
+            });
+        }
+
+
+
+        /// <summary>
+        /// Inits the helper popup and tooltip controls.
+        /// </summary>
+        private void InitControls()
+        {
+            Popup.MouseEnter += OnPopupMouseEnter;
+            Popup.MouseLeave += OnPopupMouseLeave;
+
+            //hook up the popup with the data context of it's associated object
+            //in case we have content with bindings
+            var binding = new Binding
+            {
+                Path = new PropertyPath(FrameworkElement.DataContextProperty),
+                Mode = BindingMode.OneWay,
+                Source = notifyIcon
+            };
+            BindingOperations.SetBinding(Popup, FrameworkElement.DataContextProperty, binding);
+
+            //force template application so we can switch visual states
+            var fe = notifyIcon.TrayToolTip as FrameworkElement;
+            if (fe != null)
+            {
+                fe.ApplyTemplate();
+                GoToState("Closed", false);
+            }
+        }
+        
+
+
+
+        /// <summary>
+        /// Schedules an action to be executed on the next timer tick. Resets the timer
+        /// and replaces any other pending action.
+        /// </summary>
+        /// <remarks>
+        /// Customize this if you need custom delays to show / hide / fade tooltips by
+        /// simply changing the timer interval depending on the state change.
+        /// </remarks>
+        private void Schedule(Action action)
+        {
+            lock (timer)
+            {
+                //close whatever was scheduled
+                timer.Stop();
+
+                timerAction = action;
+                timer.Start();
+            }
+        }
+
+        /// <summary>
+        /// Performs a pending action.
+        /// </summary>
+        private void OnTimerElapsed(object sender, EventArgs eventArgs)
+        {
+            lock (timer)
+            {
+                timer.Stop();
+
+                var action = timerAction;
+                timerAction = null;
+
+                //cache action and set timer action to null before invoking
+                //(that action could cause the timeraction to be reassigned)
+                if (action != null)
+                {
+                    action();
+                }
+            }
+        }
+
+
+        private void GoToState(string stateName, bool useTransitions = true)
+        {
+            var fe = notifyIcon.TrayToolTip as FrameworkElement;
+            if (fe == null) return;
+
+            VisualStateManager.GoToState(fe, stateName, useTransitions);
+        }
+
+    }
+}

Hardcodet.NotifyIcon.Wpf/Source/NotifyIconWpf/Util.cs

@@ -25,6 +25,7 @@
 using System;
 using System.ComponentModel;
 using System.Drawing;
+using System.Linq;
 using System.Windows;
 using System.Windows.Input;
 using System.Windows.Media;
@@ -202,14 +203,7 @@ namespace Hardcodet.Wpf.TaskbarNotification
         /// is a null reference.</exception>
         public static bool Is<T>(this T value, params T[] candidates)
         {
-            if (candidates == null) return false;
-
-            foreach (var t in candidates)
-            {
-                if (value.Equals(t)) return true;
-            }
-
-            return false;
+            return candidates != null && candidates.Contains(value);
         }
 
         #endregion
@@ -236,9 +230,11 @@ namespace Hardcodet.Wpf.TaskbarNotification
                     return me.Is(MouseEvent.IconDoubleClick);
                 case PopupActivationMode.MiddleClick:
                     return me == MouseEvent.IconMiddleMouseUp;
-                case PopupActivationMode.All:
+                case PopupActivationMode.AnyClick:
                     //return true for everything except mouse movements
                     return me != MouseEvent.MouseMove;
+                case PopupActivationMode.All:
+                    return true;
                 default:
                     throw new ArgumentOutOfRangeException("activationMode");
             }