class/System.Windows/System.Windows.Controls.Primitives/Popup.cs

   1 //
   2 // Popup.cs
   3 //
   4 // Contact:
   5 //   Moonlight List (moonlight-list@lists.ximian.com)
   6 //
   7 // Copyright 2008 Novell, Inc.
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using Mono;
  30 using System.Collections.Generic;
  31 using System.Windows;
  32 using System.Windows.Markup;
  33 using System.Windows.Media;
  34 using System.Windows.Input;
  35
  36 namespace System.Windows.Controls.Primitives {
  37
  38         public sealed partial class Popup : FrameworkElement
  39         {
  40                 static UnmanagedEventHandler on_opened = Events.SafeDispatcher (
  41                             (IntPtr target, IntPtr calldata, IntPtr closure) =>
  42                                 ((Popup) NativeDependencyObjectHelper.FromIntPtr (closure)).OnOpened ());
  43
  44                 void Initialize ()
  45                 {
  46                         Events.AddOnEventHandler (this, EventIds.Popup_OpenedEvent, on_opened);
  47                 }
  48
  49                 internal event EventHandler ClickedOutside;
  50
  51                 internal UIElement RealChild {
  52                         get {
  53                                 if (_clickCatcher != null) {
  54                                         Canvas root = Child as Canvas;
  55                                         return root.Children[1];
  56                                 }
  57
  58                                 return Child;
  59                         }
  60                 }
  61
  62
  63                 private void OnOpened ()
  64                 {
  65                         UpdateCatcher ();
  66
  67                         NativeMethods.event_object_do_emit_current_context (native, EventIds.Popup_OpenedEvent, IntPtr.Zero);
  68                 }
  69
  70                 Canvas _clickCatcher;
  71
  72                 internal void CatchClickedOutside ()
  73                 {
  74                         RearrangePopup ();
  75                 }
  76
  77                 void RearrangePopup ()
  78                 {
  79                         if (Child == null)
  80                                 return;
  81
  82                         UIElement child = Child;
  83                         Canvas root = new Canvas ();
  84                         _clickCatcher = new Canvas { Background = new SolidColorBrush (Colors.Transparent) };
  85                         Child = root;
  86                         root.Children.Add (_clickCatcher);
  87                         root.Children.Add (child);
  88
  89                         Child = root;
  90
  91                         _clickCatcher.MouseLeftButtonDown += delegate(object sender, MouseButtonEventArgs e) {
  92                                 EventHandler h = ClickedOutside;
  93                                 if (h != null)
  94                                         h (this, EventArgs.Empty);
  95                         };
  96                 }
  97
  98                 void UpdateCatcher ()
  99                 {
 100                         if (_clickCatcher == null)
 101                                 return;
 102
 103                         try {
 104                                 GeneralTransform xform = Application.Current.RootVisual.TransformToVisual (this);
 105
 106                                 _clickCatcher.RenderTransform = (Transform)xform;
 107                         } catch (ArgumentException) {
 108                                 // Drop errors looking up the transform
 109                         }
 110
 111                         Canvas.SetTop (_clickCatcher, -VerticalOffset);
 112                         Canvas.SetLeft (_clickCatcher, -HorizontalOffset);
 113                         _clickCatcher.Height = Application.Current.Host.Content.ActualHeight;
 114                         _clickCatcher.Width = Application.Current.Host.Content.ActualWidth;
 115                 }
 116         }
 117 }
 118