mcs/class/Managed.Windows.Forms/System.Windows.Forms.X11Internal/X11RootHwnd.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
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   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2006 Novell, Inc. (http://www.novell.com)
  21 //
  22 //
  23
  24 using System;
  25 using System.Runtime.InteropServices;
  26 using System.Windows.Forms;
  27
  28 namespace System.Windows.Forms.X11Internal {
  29
  30         internal class X11RootHwnd : X11Hwnd
  31         {
  32                 public X11RootHwnd (X11Display display, IntPtr window_handle) : base (display)
  33                 {
  34                         WholeWindow = ClientWindow = window_handle;
  35
  36                         Xlib.XSelectInput(display.Handle, WholeWindow, new IntPtr ((int)EventMask.PropertyChangeMask));
  37                 }
  38
  39                 public override void CreateWindow (CreateParams cp)
  40                 {
  41                         // we don't do anything here
  42                 }
  43
  44                 public override void PropertyChanged (XEvent xevent)
  45                 {
  46                         if (xevent.PropertyEvent.atom == Display.Atoms._NET_ACTIVE_WINDOW) {
  47                                 IntPtr actual_atom;
  48                                 int actual_format;
  49                                 IntPtr nitems;
  50                                 IntPtr bytes_after;
  51                                 IntPtr prop = IntPtr.Zero;
  52
  53                                 Xlib.XGetWindowProperty (Display.Handle, WholeWindow,
  54                                                          Display.Atoms._NET_ACTIVE_WINDOW, IntPtr.Zero, new IntPtr (1), false,
  55                                                          Display.Atoms.XA_WINDOW, out actual_atom, out actual_format, out nitems, out bytes_after, ref prop);
  56
  57                                 if (((long)nitems > 0) && (prop != IntPtr.Zero)) {
  58                                         // FIXME - is this 64 bit clean?
  59                                         Display.SetActiveWindow ((X11Hwnd)Hwnd.ObjectFromHandle((IntPtr)Marshal.ReadInt32(prop)));
  60                                         Xlib.XFree(prop);
  61                                 }
  62                         }
  63                         else if (xevent.PropertyEvent.atom == Display.Atoms._NET_SUPPORTED) {
  64                                 // we'll need to refetch the supported protocols list
  65                                 refetch_net_supported = true;
  66                                 _net_supported = null;
  67                         }
  68                         else
  69                                 base.PropertyChanged (xevent);
  70                 }
  71
  72                 bool refetch_net_supported = true;
  73                 IntPtr[] _net_supported;
  74                 public IntPtr[] _NET_SUPPORTED {
  75                         get {
  76                                 if (refetch_net_supported) {
  77                                         _net_supported = GetAtomListProperty (Display.Atoms._NET_SUPPORTED);
  78                                         refetch_net_supported = false;
  79                                 }
  80
  81                                 return _net_supported;
  82                         }
  83                 }
  84         }
  85
  86 }
  87