Account for wxTE_PROCESS_TAB when doing tab navigation on wxOSX.

src/osx/cocoa/textctrl.mm

@@ -646,6 +646,15 @@ NSView* wxMacEditHelper::ms_viewCurrentlyEdited = nil;
 }
 @end
 
+
+bool wxNSTextBase::ShouldHandleKeyNavigation(const wxKeyEvent &event) const
+{
+    // Text controls must be allowed to handle the key even if wxWANTS_CHARS is not set, provided wxTE_PROCESS_TAB
+    // is set. To make Shift+TAB work with text controls we must process it here regardless of wxTE_PROCESS_TAB.
+    // For Ctrl(+Shift)+TAB to work as navigation key consistently in all types of text fields we must process it here as well.
+    return (!m_wxPeer->HasFlag(wxTE_PROCESS_TAB) || event.HasAnyModifiers());
+}
+
 // wxNSTextViewControl
 
 // Official Apple docs suggest to use FLT_MAX when embedding an NSTextView
@@ -656,8 +665,7 @@ NSView* wxMacEditHelper::ms_viewCurrentlyEdited = nil;
 #define MAX_WIDTH 1000000
 
 wxNSTextViewControl::wxNSTextViewControl( wxTextCtrl *wxPeer, WXWidget w, long style )
-    : wxWidgetCocoaImpl(wxPeer, w),
-      wxTextWidgetImpl(wxPeer)
+    : wxNSTextBase(wxPeer, w)
 {
     wxNSTextScrollView* sv = (wxNSTextScrollView*) w;
     m_scrollView = sv;
@@ -963,8 +971,7 @@ wxSize wxNSTextViewControl::GetBestSize() const
 // wxNSTextFieldControl
 
 wxNSTextFieldControl::wxNSTextFieldControl( wxTextCtrl *text, WXWidget w )
-    : wxWidgetCocoaImpl(text, w),
-      wxTextWidgetImpl(text)
+    : wxNSTextBase(text, w)
 {
     Init(w);
 }
@@ -972,8 +979,7 @@ wxNSTextFieldControl::wxNSTextFieldControl( wxTextCtrl *text, WXWidget w )
 wxNSTextFieldControl::wxNSTextFieldControl(wxWindow *wxPeer,
                                            wxTextEntry *entry,
                                            WXWidget w)
-    : wxWidgetCocoaImpl(wxPeer, w),
-      wxTextWidgetImpl(entry)
+    : wxNSTextBase(wxPeer, entry, w)
 {
     Init(w);
 }