From 3d3afaecfb60725ac2dc86e10a46f8a5d7899810 Mon Sep 17 00:00:00 2001
From: Julian Smart <julian@anthemion.co.uk>
Date: Sun, 23 Oct 2005 10:59:01 +0000
Subject: [PATCH] Applied patch [ 1310416 ] [wxMSW] Fix radio button traversal

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35990 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/common/containr.cpp | 99 +++++++++++++++++++++++++----------------
 1 file changed, 61 insertions(+), 38 deletions(-)

diff --git a/src/common/containr.cpp b/src/common/containr.cpp
index 72f8634104..b4b63b63af 100644
--- a/src/common/containr.cpp
+++ b/src/common/containr.cpp
@@ -185,8 +185,8 @@ wxRadioButton* wxGetPreviousButtonInGroup(wxRadioButton *btn)
         // no more buttons in group
         return NULL;
     }
-    else
-        return prevBtn;
+
+    return prevBtn;
 }
 
 wxRadioButton* wxGetNextButtonInGroup(wxRadioButton *btn)
@@ -215,8 +215,8 @@ wxRadioButton* wxGetNextButtonInGroup(wxRadioButton *btn)
         // no more buttons or the first button of the next group
         return NULL;
     }
-    else
-        return nextBtn;
+
+    return nextBtn;
 }
 
 wxRadioButton* wxGetFirstButtonInGroup(wxRadioButton *btn)
@@ -231,6 +231,18 @@ wxRadioButton* wxGetFirstButtonInGroup(wxRadioButton *btn)
     }
 }
 
+wxRadioButton* wxGetLastButtonInGroup(wxRadioButton *btn)
+{
+    while (true)
+    {
+        wxRadioButton* nextBtn = wxGetNextButtonInGroup(btn);
+        if (!nextBtn)
+            return btn;
+
+        btn = nextBtn;
+    }
+}
+
 wxRadioButton* wxGetSelectedButtonInGroup(wxRadioButton *btn)
 {
     // Find currently selected button
@@ -402,39 +414,62 @@ void wxControlContainer::HandleOnNavigationKey( wxNavigationKeyEvent& event )
         wxWindow *child = node->GetData();
 
 #ifdef __WXMSW__
-        bool canSelectRadioButton = true;
-        if (!event.IsFromTab())
+        if ( event.IsFromTab() )
         {
-            // If navigating using cursor keys, make sure not to navigate out of a radio button group.
-            if (m_winLastFocused && wxIsKindOf(m_winLastFocused, wxRadioButton))
+            if ( wxIsKindOf(child, wxRadioButton) )
             {
-                if (!wxIsKindOf(child, wxRadioButton))
+                // only radio buttons with either wxRB_GROUP or wxRB_SINGLE
+                // can be tabbed to
+                if ( child->HasFlag(wxRB_GROUP) )
                 {
-                    child = forward ?
-                                wxGetNextButtonInGroup((wxRadioButton*)m_winLastFocused) :
-                                wxGetPreviousButtonInGroup((wxRadioButton*)m_winLastFocused);
-                    if (!child)
-                    {
-                        event.Skip(false);
-                        return;
-                    }
+                    // need to tab into the active button within a group
+                    wxRadioButton *rb = wxGetSelectedButtonInGroup((wxRadioButton*)child);
+                    if ( rb )
+                        child = rb;
+                }
+                else if ( !child->HasFlag(wxRB_SINGLE) )
+                {
+                    node = forward ? node->GetNext() : node->GetPrevious();
+                    continue;
                 }
             }
         }
-        else
+        else if ( m_winLastFocused &&
+                  wxIsKindOf(m_winLastFocused, wxRadioButton) &&
+                  !m_winLastFocused->HasFlag(wxRB_SINGLE) )
         {
-            // If navigating using tabs, skip all but the first radio button in a group.
-            if (wxIsKindOf(child, wxRadioButton))
+            // cursor keys don't navigate out of a radio button group so
+            // find the correct radio button to focus
+            if ( forward )
             {
-                if (wxGetPreviousButtonInGroup((wxRadioButton*)child))
-                    canSelectRadioButton = false;
+                child = wxGetNextButtonInGroup((wxRadioButton*)m_winLastFocused);
+                if ( !child )
+                {
+                    // no next button in group, set it to the first button
+                    child = wxGetFirstButtonInGroup((wxRadioButton*)m_winLastFocused);
+                }
+            }
+            else
+            {
+                child = wxGetPreviousButtonInGroup((wxRadioButton*)m_winLastFocused);
+                if ( !child )
+                {
+                    // no previous button in group, set it to the last button
+                    child = wxGetLastButtonInGroup((wxRadioButton*)m_winLastFocused);
+                }
+            }
+
+            if ( child == m_winLastFocused )
+            {
+                // must be a group consisting of only one button therefore
+                // no need to send a navigation event
+                event.Skip(false);
+                return;
             }
         }
-#else
-        static bool canSelectRadioButton = true;
-#endif
+#endif // __WXMSW__
 
-        if ( child->AcceptsFocusFromKeyboard() && canSelectRadioButton )
+        if ( child->AcceptsFocusFromKeyboard() )
         {
             // if we're setting the focus to a child panel we should prevent it
             // from giving it to the child which had the focus the last time
@@ -442,18 +477,6 @@ void wxControlContainer::HandleOnNavigationKey( wxNavigationKeyEvent& event )
             // direction we're coming
             event.SetEventObject(m_winParent);
 
-#if defined(__WXMSW__)
-            // we need to hop to the next activated
-            // radio button, not just the next radio
-            // button under MSW
-            if (wxIsKindOf(child, wxRadioButton) && event.IsFromTab())
-            {
-                wxRadioButton *rb = wxGetSelectedButtonInGroup((wxRadioButton*)child);
-                if (rb)
-                    child = rb;
-            }
-#endif // __WXMSW__
-
             // disable propagation for this call as otherwise the event might
             // bounce back to us.
             wxPropagationDisabler disableProp(event);
-- 
2.45.2