diff --git a/docs/changes.txt b/docs/changes.txt
index abbadf529d..918ff34326 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -613,11 +613,13 @@ All (GUI):
 - Accept wxALIGN_CENTRE_HORIZONTAL in wxStaticText XRC handler (David Hart).
 - Fix appearance after updating a wxGrid with hidden rows/columns (iwbnwif).
 - Make wxAuiNotebookXmlHandler actually work.
+- Fix key handling in wxStyledTextCtrl in non-Unicode build (David Costanzo).
 
 wxGTK:
 
 - Fix infinite sizing loop with GTK3 when using wxScrolled with a non-default
   target window.
+- Fix wxBitmap ctor from XBM for non-square bitmaps.
 - Fix crashes in wxGTK3 when running with non-X11 backend (Marco Trevisan).
 - Fix coordinates of wxSetCursorEvent propagated to parent windows.
 - Fix GTK+ warnings when refreshing wxListCtrl items (Scott Talbert).
@@ -627,6 +629,7 @@ wxGTK:
 wxMSW:
 
 - Fix compilation with g++ 4.9 in non-C++11 mode.
+- Fix rendering of owner drawn multi-column menus (Pete Bannister).
 - Fix regression in accessibility support (Leland Lucius).
 - Fix regression in wxDC drawing with bottom-to-top y axis (Artur Wieczorek).
 - Fix compilation with C++Builder XE compiler (Nichka).
diff --git a/include/wx/fontutil.h b/include/wx/fontutil.h
index 60bb874640..9e4d0235f9 100644
--- a/include/wx/fontutil.h
+++ b/include/wx/fontutil.h
@@ -227,6 +227,9 @@ public:
     // init with the parameters of the given font
     void InitFromFont(const wxFont& font)
     {
+#if wxUSE_PANGO
+        Init(*font.GetNativeFontInfo());
+#else
         // translate all font parameters
         SetStyle((wxFontStyle)font.GetStyle());
         SetWeight((wxFontWeight)font.GetWeight());
@@ -252,6 +255,7 @@ public:
         // deal with encoding now (it may override the font family and facename
         // so do it after setting them)
         SetEncoding(font.GetEncoding());
+#endif // !wxUSE_PANGO
     }
 
     // accessors and modifiers for the font elements
diff --git a/interface/wx/htmllbox.h b/interface/wx/htmllbox.h
index 2f3cdaee16..651f193b8c 100644
--- a/interface/wx/htmllbox.h
+++ b/interface/wx/htmllbox.h
@@ -200,6 +200,9 @@ protected:
 
     @see wxSimpleHtmlListBox::Create
 */
+#define wxHLB_DEFAULT_STYLE     wxBORDER_SUNKEN
+#define wxHLB_MULTIPLE          wxLB_MULTIPLE
+
 class wxSimpleHtmlListBox : public wxHtmlListBox,
                             public wxItemContainer
 {
diff --git a/interface/wx/utils.h b/interface/wx/utils.h
index 0bac1c07a0..f127a74084 100644
--- a/interface/wx/utils.h
+++ b/interface/wx/utils.h
@@ -372,6 +372,9 @@ wxString wxGetDisplayName();
     Even though there are virtual key codes defined for mouse buttons, they
     cannot be used with this function currently.
 
+    In wxGTK, this function can be only used with modifier keys (@c WXK_ALT, @c
+    WXK_CONTROL and @c WXK_SHIFT) when not using X11 backend currently.
+
     @header{wx/utils.h}
 */
 bool wxGetKeyState(wxKeyCode key);
diff --git a/src/common/fileconf.cpp b/src/common/fileconf.cpp
index e626c3c0cc..4e77aa983d 100644
--- a/src/common/fileconf.cpp
+++ b/src/common/fileconf.cpp
@@ -571,7 +571,7 @@ void wxFileConfig::Parse(const wxTextBuffer& buffer, bool bLocal)
       }
 
       if ( *pEnd != wxT(']') ) {
-        wxLogError(_("file '%s': unexpected character %c at line %d."),
+        wxLogError(_("file '%s': unexpected character %c at line %zu."),
                    buffer.GetName(), *pEnd, n + 1);
         continue; // skip this line
       }
@@ -607,7 +607,7 @@ void wxFileConfig::Parse(const wxTextBuffer& buffer, bool bLocal)
             break;
 
           default:
-            wxLogWarning(_("file '%s', line %d: '%s' ignored after group header."),
+            wxLogWarning(_("file '%s', line %zu: '%s' ignored after group header."),
                          buffer.GetName(), n + 1, pEnd);
             bCont = false;
         }
@@ -636,7 +636,7 @@ void wxFileConfig::Parse(const wxTextBuffer& buffer, bool bLocal)
         pEnd++;
 
       if ( *pEnd++ != wxT('=') ) {
-        wxLogError(_("file '%s', line %d: '=' expected."),
+        wxLogError(_("file '%s', line %zu: '=' expected."),
                    buffer.GetName(), n + 1);
       }
       else {
@@ -649,7 +649,7 @@ void wxFileConfig::Parse(const wxTextBuffer& buffer, bool bLocal)
         else {
           if ( bLocal && pEntry->IsImmutable() ) {
             // immutable keys can't be changed by user
-            wxLogWarning(_("file '%s', line %d: value for immutable key '%s' ignored."),
+            wxLogWarning(_("file '%s', line %zu: value for immutable key '%s' ignored."),
                          buffer.GetName(), n + 1, strKey.c_str());
             continue;
           }
@@ -659,8 +659,8 @@ void wxFileConfig::Parse(const wxTextBuffer& buffer, bool bLocal)
           //  (c) key from global file now found in local one
           // which is exactly what we want.
           else if ( !bLocal || pEntry->IsLocal() ) {
-            wxLogWarning(_("file '%s', line %d: key '%s' was first found at line %d."),
-                         buffer.GetName(), (int)n + 1, strKey.c_str(), pEntry->Line());
+            wxLogWarning(_("file '%s', line %zu: key '%s' was first found at line %d."),
+                         buffer.GetName(), n + 1, strKey.c_str(), pEntry->Line());
 
           }
         }
diff --git a/src/common/filefn.cpp b/src/common/filefn.cpp
index f563a1a5ea..f6e368ee32 100644
--- a/src/common/filefn.cpp
+++ b/src/common/filefn.cpp
@@ -1092,7 +1092,11 @@ wxCopyFile (const wxString& file1, const wxString& file2, bool overwrite)
         return false;
     }
 
-    wxDoCopyFile(fileIn, fbuf, file2, overwrite);
+    if ( !wxDoCopyFile(fileIn, fbuf, file2, overwrite) )
+    {
+        wxLogError(_("Error copying the file '%s' to '%s'."), file1, file2);
+        return false;
+    }
 
 #if defined(__WXMAC__) || defined(__WXCOCOA__)
     // copy the resource fork of the file too if it's present
diff --git a/src/common/fontenumcmn.cpp b/src/common/fontenumcmn.cpp
index 1185a864ab..f0d6f68d7e 100644
--- a/src/common/fontenumcmn.cpp
+++ b/src/common/fontenumcmn.cpp
@@ -124,7 +124,8 @@ bool wxFontEnumerator::EnumerateEncodingsUTF8(const wxString& facename)
 
     for ( size_t n = 0; n < count; n++ )
     {
-        OnFontEncoding(facenames[n], utf8);
+        if ( !OnFontEncoding(facenames[n], utf8) )
+            break;
     }
 
     return true;
diff --git a/src/gtk/bitmap.cpp b/src/gtk/bitmap.cpp
index f81e7104a8..d3abc4c89b 100644
--- a/src/gtk/bitmap.cpp
+++ b/src/gtk/bitmap.cpp
@@ -428,17 +428,18 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
         const char* src = bits;
         guchar* dst = gdk_pixbuf_get_pixels(pixbuf);
         const int stride_src = (width + 7) / 8;
-        const int rowinc_dst = gdk_pixbuf_get_rowstride(pixbuf) - 3 * width;
-        for (int j = 0; j < width; j++, src += stride_src, dst += rowinc_dst)
+        const int stride_dst = gdk_pixbuf_get_rowstride(pixbuf);
+        for (int j = 0; j < height; j++, src += stride_src, dst += stride_dst)
         {
-            for (int i = 0; i < height; i++)
+            guchar* d = dst;
+            for (int i = 0; i < width; i++)
             {
                 guchar c = 0xff;
                 if (src[i >> 3] & (1 << (i & 7)))
                     c = 0;
-                *dst++ = c;
-                *dst++ = c;
-                *dst++ = c;
+                *d++ = c;
+                *d++ = c;
+                *d++ = c;
             }
         }
 #else
diff --git a/src/gtk/control.cpp b/src/gtk/control.cpp
index f11b6e80ed..c418af212c 100644
--- a/src/gtk/control.cpp
+++ b/src/gtk/control.cpp
@@ -250,6 +250,7 @@ wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
         stateFlag = GTK_STATE_FLAG_ACTIVE;
     }
     GtkStyleContext* sc = gtk_widget_get_style_context(widget);
+    gtk_style_context_save(sc);
     GdkRGBA c;
     gtk_style_context_set_state(sc, stateFlag);
     gtk_style_context_get_color(sc, stateFlag, &c);
@@ -260,6 +261,7 @@ wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
     gtk_style_context_get(
         sc, stateFlag, GTK_STYLE_PROPERTY_FONT, &info.description, NULL);
     attr.font = wxFont(info);
+    gtk_style_context_restore(sc);
 #else
     GtkStyle* style;
 
diff --git a/src/gtk/frame.cpp b/src/gtk/frame.cpp
index 50b536c44a..bf8a8940eb 100644
--- a/src/gtk/frame.cpp
+++ b/src/gtk/frame.cpp
@@ -280,8 +280,6 @@ void wxFrame::DetachMenuBar()
 #if wxUSE_LIBHILDON || wxUSE_LIBHILDON2
         hildon_window_set_menu(HILDON_WINDOW(m_widget), NULL);
 #else // !wxUSE_LIBHILDON && !wxUSE_LIBHILDON2
-        g_object_ref( m_frameMenuBar->m_widget );
-
         gtk_container_remove( GTK_CONTAINER(m_mainWidget), m_frameMenuBar->m_widget );
 #endif // wxUSE_LIBHILDON || wxUSE_LIBHILDON2 /!wxUSE_LIBHILDON && !wxUSE_LIBHILDON2
     }
diff --git a/src/gtk/toplevel.cpp b/src/gtk/toplevel.cpp
index acd3692d7e..d213cc8dc1 100644
--- a/src/gtk/toplevel.cpp
+++ b/src/gtk/toplevel.cpp
@@ -38,20 +38,6 @@
     #include <X11/Xatom.h>  // XA_CARDINAL
     #include "wx/unix/utilsx11.h"
 #endif
-#ifdef GDK_WINDOWING_WAYLAND
-    #include <gdk/gdkwayland.h>
-    #define HAS_CLIENT_DECOR
-#endif
-#ifdef GDK_WINDOWING_MIR
-    extern "C" {
-    #include <gdk/gdkmir.h>
-    }
-    #define HAS_CLIENT_DECOR
-#endif
-#ifdef GDK_WINDOWING_BROADWAY
-    #include <gdk/gdkbroadway.h>
-    #define HAS_CLIENT_DECOR
-#endif
 
 #include "wx/gtk/private.h"
 #include "wx/gtk/private/gtk2-compat.h"
@@ -93,25 +79,29 @@ static enum {
 static bool gs_decorCacheValid;
 #endif
 
-#ifdef HAS_CLIENT_DECOR
+#ifdef __WXGTK3__
 static bool HasClientDecor(GtkWidget* widget)
 {
-    GdkDisplay* display = gtk_widget_get_display(widget);
-#ifdef GDK_WINDOWING_WAYLAND
-    if (GDK_IS_WAYLAND_DISPLAY(display))
-        return true;
-#endif
-#ifdef GDK_WINDOWING_MIR
-    if (GDK_IS_MIR_DISPLAY(display))
-        return true;
-#endif
-#ifdef GDK_WINDOWING_BROADWAY
-    if (GDK_IS_BROADWAY_DISPLAY(display))
-        return true;
-#endif
+    static bool has;
+    static bool once;
+    if (!once)
+    {
+        once = true;
+        GdkDisplay* display = gtk_widget_get_display(widget);
+        const char* name = g_type_name(G_TYPE_FROM_INSTANCE(display));
+        has =
+            strcmp(name, "GdkWaylandDisplay") == 0 ||
+            strcmp(name, "GdkMirDisplay") == 0 ||
+            strcmp(name, "GdkBroadwayDisplay") == 0;
+    }
+    return has;
+}
+#else
+static inline bool HasClientDecor(GtkWidget*)
+{
     return false;
 }
-#endif // HAS_CLIENT_DECOR
+#endif
 
 //-----------------------------------------------------------------------------
 // RequestUserAttention related functions
@@ -266,7 +256,6 @@ size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
         GtkAllocation a;
         gtk_widget_get_allocation(win->m_widget, &a);
         wxSize size(a.width, a.height);
-#ifdef HAS_CLIENT_DECOR
         if (HasClientDecor(win->m_widget))
         {
             GtkAllocation a2;
@@ -279,7 +268,6 @@ size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
             win->GTKUpdateDecorSize(decorSize);
         }
         else
-#endif
         {
             size.x += win->m_decorSize.left + win->m_decorSize.right;
             size.y += win->m_decorSize.top + win->m_decorSize.bottom;
@@ -760,9 +748,9 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 
         if ( style & wxCAPTION )
             m_gdkDecor |= GDK_DECOR_TITLE;
-#if defined(GDK_WINDOWING_WAYLAND) && GTK_CHECK_VERSION(3,10,0)
+#if GTK_CHECK_VERSION(3,10,0)
         else if (
-            GDK_IS_WAYLAND_DISPLAY(gtk_widget_get_display(m_widget)) &&
+            strcmp("GdkWaylandDisplay", g_type_name(G_TYPE_FROM_INSTANCE(gtk_widget_get_display(m_widget)))) == 0 &&
             gtk_check_version(3,10,0) == NULL)
         {
             gtk_window_set_titlebar(GTK_WINDOW(m_widget), gtk_header_bar_new());
@@ -1109,9 +1097,7 @@ void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXU
 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 {
     wxSize size(m_width, m_height);
-#ifdef HAS_CLIENT_DECOR
     if (!HasClientDecor(m_widget))
-#endif
     {
         size.x -= m_decorSize.left + m_decorSize.right;
         size.y -= m_decorSize.top + m_decorSize.bottom;
@@ -1280,14 +1266,12 @@ void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
     hints.max_height = INT_MAX / 16;
     int decorSize_x;
     int decorSize_y;
-#ifdef HAS_CLIENT_DECOR
     if (HasClientDecor(m_widget))
     {
         decorSize_x = 0;
         decorSize_y = 0;
     }
     else
-#endif
     {
         decorSize_x = m_decorSize.left + m_decorSize.right;
         decorSize_y = m_decorSize.top + m_decorSize.bottom;
@@ -1323,13 +1307,11 @@ void wxTopLevelWindowGTK::GTKUpdateDecorSize(const DecorSize& decorSize)
     if (!IsMaximized() && !IsFullScreen())
         GetCachedDecorSize() = decorSize;
 
-#ifdef HAS_CLIENT_DECOR
     if (HasClientDecor(m_widget))
     {
         m_decorSize = decorSize;
         return;
     }
-#endif
 #ifdef GDK_WINDOWING_X11
     if (m_updateDecorSize && memcmp(&m_decorSize, &decorSize, sizeof(DecorSize)))
     {
diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index 8920d55a22..d27f889f59 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -304,8 +304,10 @@ draw_border(GtkWidget* widget, GdkEventExpose* gdk_event, wxWindow* win)
 #ifdef __WXGTK3__
         GtkStyleContext* sc = gtk_widget_get_style_context(win->m_wxwindow);
         GdkRGBA c;
+        gtk_style_context_save(sc);
         gtk_style_context_set_state(sc, GTK_STATE_FLAG_NORMAL);
         gtk_style_context_get_border_color(sc, GTK_STATE_FLAG_NORMAL, &c);
+        gtk_style_context_restore(sc);
         gdk_cairo_set_source_rgba(cr, &c);
         cairo_set_line_width(cr, 1);
         cairo_rectangle(cr, x + 0.5, y + 0.5, w - 1, h - 1);
@@ -4444,9 +4446,11 @@ void wxWindowGTK::GTKApplyStyle(GtkWidget* widget, GtkRcStyle* WXUNUSED_IN_GTK3(
     cairo_pattern_t* pattern = NULL;
     if (m_backgroundColour.IsOk())
     {
+        gtk_style_context_save(context);
         gtk_style_context_set_state(context, GTK_STATE_FLAG_NORMAL);
         gtk_style_context_get(context,
             GTK_STATE_FLAG_NORMAL, "background-image", &pattern, NULL);
+        gtk_style_context_restore(context);
     }
     if (pattern)
     {
diff --git a/src/msw/menuitem.cpp b/src/msw/menuitem.cpp
index f845e3b3d3..2d53e1576d 100644
--- a/src/msw/menuitem.cpp
+++ b/src/msw/menuitem.cpp
@@ -873,7 +873,8 @@ bool wxMenuItem::OnDrawItem(wxDC& dc, const wxRect& rc,
         data->SeparatorMargin.ApplyTo(rcSeparator);
 
         RECT rcGutter = rcSelection;
-        rcGutter.right = data->ItemMargin.cxLeftWidth
+        rcGutter.right = rcGutter.left
+                       + data->ItemMargin.cxLeftWidth
                        + data->CheckBgMargin.cxLeftWidth
                        + data->CheckMargin.cxLeftWidth
                        + imgWidth
diff --git a/src/osx/carbon/dataobj.cpp b/src/osx/carbon/dataobj.cpp
index c363f23213..1fd98fddf2 100644
--- a/src/osx/carbon/dataobj.cpp
+++ b/src/osx/carbon/dataobj.cpp
@@ -29,10 +29,6 @@
 
 #include "wx/osx/private.h"
 
-#if wxOSX_USE_COCOA_OR_CARBON
-    #include <QuickTime/QuickTime.h>
-#endif
-
 // ----------------------------------------------------------------------------
 // wxDataFormat
 // ----------------------------------------------------------------------------
diff --git a/src/osx/core/bitmap.cpp b/src/osx/core/bitmap.cpp
index c1bf6b7113..228b1d1842 100644
--- a/src/osx/core/bitmap.cpp
+++ b/src/osx/core/bitmap.cpp
@@ -35,10 +35,6 @@ IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
 #include "wx/osx/private.h"
 #endif
 
-#ifndef __WXOSX_IPHONE__
-#include <QuickTime/QuickTime.h>
-#endif
-
 CGColorSpaceRef wxMacGetGenericRGBColorSpace();
 CGDataProviderRef wxMacCGDataProviderCreateWithMemoryBuffer( const wxMemoryBuffer& buf );
 
diff --git a/src/stc/stc.cpp b/src/stc/stc.cpp
index 38b9d52e30..e16eaad412 100644
--- a/src/stc/stc.cpp
+++ b/src/stc/stc.cpp
@@ -4749,7 +4749,7 @@ void wxStyledTextCtrl::OnChar(wxKeyEvent& evt) {
         }
 #else
         int key = evt.GetKeyCode();
-        if (key <= WXK_START || key > WXK_COMMAND) {
+        if (key < WXK_START) {
             m_swx->DoAddChar(key);
             return;
         }
diff --git a/src/stc/stc.cpp.in b/src/stc/stc.cpp.in
index cd4ee94e94..50c2dab618 100644
--- a/src/stc/stc.cpp.in
+++ b/src/stc/stc.cpp.in
@@ -887,7 +887,7 @@ void wxStyledTextCtrl::OnChar(wxKeyEvent& evt) {
         }
 #else
         int key = evt.GetKeyCode();
-        if (key <= WXK_START || key > WXK_COMMAND) {
+        if (key < WXK_START) {
             m_swx->DoAddChar(key);
             return;
         }
diff --git a/src/unix/fontenum.cpp b/src/unix/fontenum.cpp
index cc7ee1dad4..e3739ed497 100644
--- a/src/unix/fontenum.cpp
+++ b/src/unix/fontenum.cpp
@@ -89,7 +89,10 @@ bool wxFontEnumerator::EnumerateFacenames(wxFontEncoding encoding,
 #endif
         {
             const gchar *name = pango_font_family_get_name(families[i]);
-            OnFacename(wxString(name, wxConvUTF8));
+            if ( !OnFacename(wxString(name, wxConvUTF8)) )
+            {
+                break;
+            }
         }
     }
     g_free(families);
diff --git a/src/unix/mimetype.cpp b/src/unix/mimetype.cpp
index 265f86aae0..72c8d4850f 100644
--- a/src/unix/mimetype.cpp
+++ b/src/unix/mimetype.cpp
@@ -561,7 +561,7 @@ void wxMimeTypesManagerImpl::Initialize(int mailcapStyles,
         }
 
         wxArrayString dirs;
-        wxStringTokenizer tokenizer(xdgDataDirs, ":");
+        wxStringTokenizer tokenizer(xdgDataDirs, ":", wxTOKEN_STRTOK);
         while ( tokenizer.HasMoreTokens() )
         {
             wxString p = tokenizer.GetNextToken();
diff --git a/src/unix/utilsx11.cpp b/src/unix/utilsx11.cpp
index 6b35551647..efc0837431 100644
--- a/src/unix/utilsx11.cpp
+++ b/src/unix/utilsx11.cpp
@@ -809,7 +809,7 @@ WXKeySym wxCharCodeWXToX(int id)
 // check current state of a key
 // ----------------------------------------------------------------------------
 
-bool wxGetKeyState(wxKeyCode key)
+static bool wxGetKeyStateX11(wxKeyCode key)
 {
     wxASSERT_MSG(key != WXK_LBUTTON && key != WXK_RBUTTON && key !=
         WXK_MBUTTON, wxT("can't use wxGetKeyState() for mouse buttons"));
@@ -851,11 +851,69 @@ bool wxGetKeyState(wxKeyCode key)
     // with the least-significant bit in the byte representing key 8N.
     char key_vector[32];
     XQueryKeymap(pDisplay, key_vector);
-    return key_vector[keyCode >> 3] & (1 << (keyCode & 7));
+    return (key_vector[keyCode >> 3] & (1 << (keyCode & 7))) != 0;
 }
 
 #endif // !defined(__WXGTK__) || defined(GDK_WINDOWING_X11)
 
+// We need to use GDK functions when using wxGTK with a non-X11 backend, the
+// X11 code above can't work in this case.
+#ifdef __WXGTK__
+
+// gdk_keymap_get_modifier_state() is only available since 3.4
+#if GTK_CHECK_VERSION(3,4,0)
+
+#define wxHAS_GETKEYSTATE_GTK
+
+extern GtkWidget *wxGetRootWindow();
+
+static bool wxGetKeyStateGTK(wxKeyCode key)
+{
+    if (gtk_check_version(3,4,0) != NULL)
+        return false;
+
+    GdkDisplay* display = gtk_widget_get_display(wxGetRootWindow());
+    GdkKeymap* keymap = gdk_keymap_get_for_display(display);
+    guint state = gdk_keymap_get_modifier_state(keymap);
+    guint mask = 0;
+    switch (key)
+    {
+        case WXK_ALT:
+            mask = GDK_MOD1_MASK;
+            break;
+
+        case WXK_CONTROL:
+            mask = GDK_CONTROL_MASK;
+            break;
+
+        case WXK_SHIFT:
+            mask = GDK_SHIFT_MASK;
+            break;
+
+        default:
+            wxFAIL_MSG(wxS("Unsupported key, only modifiers can be used"));
+            return false;
+    }
+    return (state & mask) != 0;
+}
+
+#endif // GTK+ 3.4
+#endif // __WXGTK__
+
+bool wxGetKeyState(wxKeyCode key)
+{
+#ifdef wxHAS_GETKEYSTATE_GTK
+    GdkDisplay* display = gtk_widget_get_display(wxGetRootWindow());
+    const char* name = g_type_name(G_TYPE_FROM_INSTANCE(display));
+    if (strcmp(name, "GdkX11Display") != 0)
+    {
+        return wxGetKeyStateGTK(key);
+    }
+#endif // GTK+ 3.4+
+
+    return wxGetKeyStateX11(key);
+}
+
 // ----------------------------------------------------------------------------
 // Launch document with default app
 // ----------------------------------------------------------------------------
diff --git a/src/xrc/xh_auinotbk.cpp b/src/xrc/xh_auinotbk.cpp
index df7498394f..0a2c178f53 100644
--- a/src/xrc/xh_auinotbk.cpp
+++ b/src/xrc/xh_auinotbk.cpp
@@ -35,6 +35,7 @@ wxAuiNotebookXmlHandler::wxAuiNotebookXmlHandler()
     XRC_ADD_STYLE(wxAUI_NB_CLOSE_BUTTON);
     XRC_ADD_STYLE(wxAUI_NB_CLOSE_ON_ACTIVE_TAB);
     XRC_ADD_STYLE(wxAUI_NB_CLOSE_ON_ALL_TABS);
+    XRC_ADD_STYLE(wxAUI_NB_MIDDLE_CLICK_CLOSE);
     XRC_ADD_STYLE(wxAUI_NB_TOP);
     XRC_ADD_STYLE(wxAUI_NB_BOTTOM);