Fix wxRadioButtons without explicit wxRB_GROUP styles in wxGTK.

If two radio buttons are created consecutively, they should be part of the
same radio group, even if wxRB_GROUP hadn't been explicitly used for the first
of them.

Do this is for consistency with wxMSW and also because the alternative
behaviour doesn't make much sense.

Also stop iterating too far backwards when searching for the group to be used
for a new radio button and add comments explaining what's going on here.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71091 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/gtk/radiobut.cpp b/src/gtk/radiobut.cpp
index a8c0a8b8a6f7d1a79c5e4a2bd21f3d30aa2fa302..73aedb99adb8da370cbaa99514f3d3ba054734cb 100644 (file)
--- a/src/gtk/radiobut.cpp
+++ b/src/gtk/radiobut.cpp
@@ -63,6 +63,9 @@ bool wxRadioButton::Create( wxWindow *parent,
         return false;
     }
 
+    // Check if this radio button should be put into an existing group. This
+    // shouldn't be done if it's given a style to explicitly start a new group
+    // or if it's not meant to be a part of a group at all.
     GSList* radioButtonGroup = NULL;
     if (!HasFlag(wxRB_GROUP) && !HasFlag(wxRB_SINGLE))
     {
@@ -71,10 +74,22 @@ bool wxRadioButton::Create( wxWindow *parent,
         for (; node; node = node->GetPrevious())
         {
             wxWindow *child = node->GetData();
-            if (child->HasFlag(wxRB_GROUP) && wxIsKindOf(child, wxRadioButton))
+
+            // We stop at the first previous radio button in any case as it
+            // wouldn't make sense to put this button in a group with another
+            // one if there is a radio button that is not part of the same
+            // group between them.
+            if (wxIsKindOf(child, wxRadioButton))
             {
-                radioButtonGroup = gtk_radio_button_get_group(
-                    GTK_RADIO_BUTTON(child->m_widget));
+                // Any preceding radio button can be used to get its group, not
+                // necessarily one with wxRB_GROUP style, but exclude
+                // wxRB_SINGLE ones as their group should never be shared.
+                if (!child->HasFlag(wxRB_SINGLE))
+                {
+                    radioButtonGroup = gtk_radio_button_get_group(
+                        GTK_RADIO_BUTTON(child->m_widget));
+                }
+
                 break;
             }
         }