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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   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                                 X11Hwnd prev_active;
  53
  54                                 prev_active = Display.ActiveWindow;
  55                                 Xlib.XGetWindowProperty (Display.Handle, WholeWindow,
  56                                                          Display.Atoms._NET_ACTIVE_WINDOW, IntPtr.Zero, new IntPtr (1), false,
  57                                                          Display.Atoms.XA_WINDOW, out actual_atom, out actual_format, out nitems, out bytes_after, ref prop);
  58
  59                                 if (((long)nitems > 0) && (prop != IntPtr.Zero)) {
  60                                         // FIXME - is this 64 bit clean?
  61                                         Display.ActiveWindow = (X11Hwnd)Hwnd.ObjectFromHandle((IntPtr)Marshal.ReadInt32(prop));
  62                                         Xlib.XFree(prop);
  63
  64                                         if (prev_active != Display.ActiveWindow) {
  65                                                 if (prev_active != null) {
  66                                                         Display.PostMessage (prev_active.Handle, Msg.WM_ACTIVATE,
  67                                                                              (IntPtr)WindowActiveFlags.WA_INACTIVE, IntPtr.Zero);
  68                                                 }
  69                                                 if (Display.ActiveWindow != null) {
  70                                                         Display.PostMessage (Display.ActiveWindow.Handle, Msg.WM_ACTIVATE,
  71                                                                              (IntPtr)WindowActiveFlags.WA_ACTIVE, IntPtr.Zero);
  72                                                 }
  73                                         }
  74
  75                                         // XXX this next bit should be in the X11Display.ActiveWindow setter
  76
  77                                         if (Display.ModalWindows.Count > 0) {
  78                                                 // Modality handling, if we are modal and the new active window is one
  79                                                 // of ours but not the modal one, switch back to the modal window
  80
  81                                                 if (Display.ActiveWindow != null &&
  82                                                     NativeWindow.FindWindow (Display.ActiveWindow.Handle) != null) {
  83                                                         if (Display.ActiveWindow != (X11Hwnd)Display.ModalWindows.Peek()) {
  84                                                                 ((X11Hwnd)Display.ModalWindows.Peek()).Activate ();
  85                                                         }
  86                                                 }
  87                                         }
  88                                 }
  89                         }
  90                         else if (xevent.PropertyEvent.atom == Display.Atoms._NET_SUPPORTED) {
  91                                 // we'll need to refetch the supported protocols list
  92                                 refetch_net_supported = true;
  93                                 _net_supported = null;
  94                         }
  95                         else
  96                                 base.PropertyChanged (xevent);
  97                 }
  98
  99                 bool refetch_net_supported = true;
 100                 IntPtr[] _net_supported;
 101                 public IntPtr[] _NET_SUPPORTED {
 102                         get {
 103                                 if (refetch_net_supported) {
 104                                         _net_supported = GetAtomListProperty (Display.Atoms._NET_SUPPORTED);
 105                                         refetch_net_supported = false;
 106                                 }
 107
 108                                 return _net_supported;
 109                         }
 110                 }
 111         }
 112
 113 }
 114