Popup.cs :  » 2.6.4-mono-.net-core » System.Windows » System » Windows » Controls » Primitives » C# / CSharp Open Source

//
// Popup.cs
//
// Contact:
//   Moonlight List (moonlight-list@lists.ximian.com)
//
// Copyright 2008 Novell, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using Mono;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Input;
using System.Windows.Automation.Peers;

namespace System.Windows.Controls.Primitives{

  public sealed partial class Popup : FrameworkElement
  {
    static UnmanagedEventHandler on_opened = Events.SafeDispatcher (
          (IntPtr target, IntPtr calldata, IntPtr closure) =>
            ((Popup) NativeDependencyObjectHelper.FromIntPtr (closure)).OnOpened ());

    private new void Initialize ()
    {
      Events.AddOnEventHandler (this, EventIds.Popup_OpenedEvent, on_opened);
    }

    internal event EventHandler ClickedOutside;

    internal UIElement RealChild {
      get {
        if (_clickCatcher != null) {
          Canvas root = Child as Canvas;
          return root.Children[1];
        }

        return Child;
      }
    }

    
    private void OnOpened ()
    {
      UpdateCatcher ();
      
      NativeMethods.event_object_do_emit_current_context (native, EventIds.Popup_OpenedEvent, IntPtr.Zero);
    }

    Canvas _clickCatcher;
    
    internal void CatchClickedOutside ()
    {
      RearrangePopup ();
    }
    
    void RearrangePopup ()
    {
      if (Child == null)
        return;
      
      UIElement child = Child;
      Canvas root = new Canvas ();
      _clickCatcher = new Canvas { Background = new SolidColorBrush (Colors.Transparent) };
      Child = root;
      root.Children.Add (_clickCatcher);
      root.Children.Add (child);
      
      Child = root;

      _clickCatcher.MouseLeftButtonDown += delegate(object sender, MouseButtonEventArgs e) {
        EventHandler h = ClickedOutside;
        if (h != null)
          h (this, EventArgs.Empty);
      };
    }

    void UpdateCatcher ()
    {
      if (_clickCatcher == null)
        return;
      
      try {
        GeneralTransform xform = Application.Current.RootVisual.TransformToVisual (this);
        
        _clickCatcher.RenderTransform = (Transform)xform;
      } catch (ArgumentException) {
        // Drop errors looking up the transform
      }

      Canvas.SetTop (_clickCatcher, -VerticalOffset);
      Canvas.SetLeft (_clickCatcher, -HorizontalOffset);
      _clickCatcher.Height = Application.Current.Host.Content.ActualHeight;
      _clickCatcher.Width = Application.Current.Host.Content.ActualWidth;    
    }

    protected override AutomationPeer OnCreateAutomationPeer ()
    {
      return new PopupAutomationPeer (this);
    }
  }
}