1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/nativewin.cpp
3 // Purpose: wxNativeWindow implementation
4 // Author: Vadim Zeitlin
5 // Created: 2008-03-05
6 // Copyright: (c) 2008 Vadim Zeitlin <vadim@wxwindows.org>
7 // Licence: wxWindows licence
8 ///////////////////////////////////////////////////////////////////////////////
9
10 // ============================================================================
11 // declarations
12 // ============================================================================
13
14 // ----------------------------------------------------------------------------
15 // headers
16 // ----------------------------------------------------------------------------
17
18 // for compilers that support precompilation, includes "wx.h".
19 #include "wx/wxprec.h"
20
21 #ifdef __BORLANDC__
22 #pragma hdrstop
23 #endif
24
25 #ifndef WX_PRECOMP
26 #endif // WX_PRECOMP
27
28 #include "wx/nativewin.h"
29
30 #include <gtk/gtk.h>
31 #include "wx/gtk/private/gtk2-compat.h"
32
33 #ifdef GDK_WINDOWING_X11
34 #include <gdk/gdkx.h>
35 #endif
36
37 // ============================================================================
38 // implementation
39 // ============================================================================
40
41 // TODO: we probably need equivalent code for other GDK platforms
42 #ifdef GDK_WINDOWING_X11
43
44 extern "C" GdkFilterReturn
wxNativeContainerWindowFilter(GdkXEvent * gdkxevent,GdkEvent * event,gpointer data)45 wxNativeContainerWindowFilter(GdkXEvent *gdkxevent,
46 GdkEvent *event,
47 gpointer data)
48 {
49 XEvent * const xevent = static_cast<XEvent *>(gdkxevent);
50 if ( xevent->type == DestroyNotify )
51 {
52 // we won't need it any more
53 gdk_window_remove_filter(event->any.window,
54 wxNativeContainerWindowFilter, data);
55
56 // the underlying window got destroyed, notify the C++ object
57 static_cast<wxNativeContainerWindow *>(data)->OnNativeDestroyed();
58 }
59
60 return GDK_FILTER_CONTINUE;
61 }
62
63 #endif // GDK_WINDOWING_X11
64
Create(wxNativeContainerWindowHandle win)65 bool wxNativeContainerWindow::Create(wxNativeContainerWindowHandle win)
66 {
67 wxCHECK( win, false );
68
69 if ( !wxTopLevelWindow::Create(NULL, wxID_ANY, "") )
70 return false;
71
72 // we need to realize the window first before reparenting it
73 gtk_widget_realize(m_widget);
74 gdk_window_reparent(gtk_widget_get_window(m_widget), win, 0, 0);
75
76 #ifdef GDK_WINDOWING_X11
77 // if the native window is destroyed, our own window will be destroyed too
78 // but GTK doesn't expect it and will complain about "unexpectedly
79 // destroyed" GdkWindow, so intercept to DestroyNotify ourselves to fix
80 // this and also destroy the associated C++ object when its window is
81 // destroyed
82 gdk_window_add_filter(gtk_widget_get_window(m_widget), wxNativeContainerWindowFilter, this);
83 #endif // GDK_WINDOWING_X11
84
85 // we should be initially visible as we suppose that the native window we
86 // wrap is (we could use gdk_window_is_visible() to test for this but this
87 // doesn't make much sense unless we also react to visibility changes, so
88 // just suppose it's always shown for now)
89 Show();
90
91 return true;
92 }
93
Create(wxNativeContainerWindowId anid)94 bool wxNativeContainerWindow::Create(wxNativeContainerWindowId anid)
95 {
96 bool rc;
97 #ifdef __WXGTK3__
98 #ifdef GDK_WINDOWING_X11
99 GdkWindow * const win = gdk_x11_window_foreign_new_for_display(gdk_display_get_default(), anid);
100 #else
101 GdkWindow * const win = NULL;
102 #endif
103 #else
104 GdkWindow * const win = gdk_window_foreign_new(anid);
105 #endif
106 if ( win )
107 {
108 rc = Create(win);
109 g_object_unref(win);
110 }
111 else // invalid native window id
112 {
113 rc = false;
114 }
115
116 return rc;
117 }
118
OnNativeDestroyed()119 void wxNativeContainerWindow::OnNativeDestroyed()
120 {
121 // unfortunately we simply can't do anything else than leak memory here:
122 // we really need to call _gdk_window_destroy(m_widget->win, TRUE) to
123 // indicate that the native window was deleted, but we can't do this
124 // because it's a private GDK function and calling normal
125 // gdk_window_destroy() results in X errors while nulling just the window
126 // pointer and destroying m_widget results in many GTK errors
127 GTKDisconnect(m_widget);
128 m_widget = NULL;
129
130 // notice that we intentionally don't use Close() nor Delete() here as our
131 // window (and the windows of all of our children) is invalid any more and
132 // any attempts to use it, as may happen with the delayed destruction, will
133 // result in GDK warnings at best and crashes or X errors at worst
134 delete this;
135 }
136
~wxNativeContainerWindow()137 wxNativeContainerWindow::~wxNativeContainerWindow()
138 {
139 // nothing to do here, either we have a valid m_widget and it will be
140 // destroyed as usual (this corresponds to manual destruction of this C++
141 // object) or we are being deleted because the native window was destroyed
142 // and in this case our m_widget was set to NULL by OnNativeDestroyed()
143 }
144