Store any number of image lists in wxRibbonBar, not just two

The same wxRibbonBar can use multiple button bars with different icon
sizes, so 2 image lists are not enough. But OTOH there is no need to
distinguish between small and large images neither, so 2 may be also 1
too many.

Instead, use however many image lists we need, depending on the size.
For now, just store them in a vector and use linear search in it,
instead of using a map or, maybe, sorted vector, as we suppose there are
never going to be more than a couple of elements in this vector anyhow.

include/wx/ribbon/bar.h

@@ -20,6 +20,8 @@ class WXDLLIMPEXP_FWD_CORE wxImageList;
 #include "wx/ribbon/control.h"
 #include "wx/ribbon/page.h"
 
+#include "wx/vector.h"
+
 enum wxRibbonBarOption
 {
     wxRIBBON_BAR_SHOW_PAGE_LABELS    = 1 << 0,
@@ -154,9 +156,9 @@ public:
 
     void HideIfExpanded();
 
-    // Implementation only.
+    // Return the image list containing images of the given size, creating it
+    // if necessary.
     wxImageList* GetButtonImageList(wxSize size);
-    wxImageList* GetButtonSmallImageList(wxSize size);
 
 protected:
     friend class wxRibbonPage;
@@ -214,8 +216,7 @@ protected:
 
     wxRibbonDisplayMode m_ribbon_state;
 
-    wxImageList* m_buttonImageList;
-    wxImageList* m_buttonSmallImageList;
+    wxVector<wxImageList*> m_image_lists;
 
 #ifndef SWIG
     wxDECLARE_CLASS(wxRibbonBar);

src/ribbon/bar.cpp

@@ -736,8 +736,6 @@ wxRibbonBar::wxRibbonBar()
     m_tab_scroll_buttons_shown = false;
     m_arePanelsShown = true;
     m_help_button_hovered = false;
-    m_buttonImageList = NULL;
-    m_buttonSmallImageList = NULL;
 
 }
 
@@ -755,8 +753,10 @@ wxRibbonBar::~wxRibbonBar()
 {
     SetArtProvider(NULL);
 
-    delete m_buttonImageList;
-    delete m_buttonSmallImageList;
+    for ( size_t n = 0; n < m_image_lists.size(); ++n )
+    {
+        delete m_image_lists[n];
+    }
 }
 
 bool wxRibbonBar::Create(wxWindow* parent,
@@ -805,29 +805,21 @@ void wxRibbonBar::CommonInit(long style)
     m_bar_hovered = false;
 
     m_ribbon_state = wxRIBBON_BAR_PINNED;
-
-    m_buttonImageList = NULL;
-    m_buttonSmallImageList = NULL;
 }
 
 wxImageList* wxRibbonBar::GetButtonImageList(wxSize size)
 {
-    if ( !m_buttonImageList )
+    for ( size_t n = 0; n < m_image_lists.size(); ++n )
     {
-        m_buttonImageList = new wxImageList(size.GetWidth(), size.GetHeight(),
-                                            /*mask*/false);
+        if ( m_image_lists[n]->GetSize() == size )
+            return m_image_lists[n];
     }
-    return m_buttonImageList;
-}
 
-wxImageList* wxRibbonBar::GetButtonSmallImageList(wxSize size)
-{
-    if ( !m_buttonSmallImageList )
-    {
-        m_buttonSmallImageList = new wxImageList(size.GetWidth(), size.GetHeight(),
-                                                 /*mask*/false);
-    }
-    return m_buttonSmallImageList;
+    wxImageList* const
+        il = new wxImageList(size.GetWidth(), size.GetHeight(), /*mask*/false);
+    m_image_lists.push_back(il);
+
+    return il;
 }
 
 void wxRibbonBar::SetArtProvider(wxRibbonArtProvider* art)

src/ribbon/buttonbar.cpp

@@ -151,7 +151,7 @@ public:
             }
 
             wxImageList* const
-                buttonSmallImageList = ribbon->GetButtonSmallImageList(bitmap_size_small);
+                buttonSmallImageList = ribbon->GetButtonImageList(bitmap_size_small);
 
             barButtonSmallImageListPos = buttonSmallImageList->Add(m_bitmap_small);
             m_bitmap_small = wxNullBitmap;
@@ -164,12 +164,12 @@ public:
                     wxSize bitmap_size_large,
                     wxSize bitmap_size_small,
                     wxBitmap& bitmap,
-                    wxBitmap bitmap_small) const
+                    wxBitmap& bitmap_small) const
     {
         if ( barButtonImageListPos != -1 && ribbon )
         {
             wxImageList* buttonImageList = ribbon->GetButtonImageList(bitmap_size_large);
-            wxImageList* buttonSmallImageList = ribbon->GetButtonSmallImageList(bitmap_size_small);
+            wxImageList* buttonSmallImageList = ribbon->GetButtonImageList(bitmap_size_small);
 
             int pos = barButtonImageListPos;
             int pos_small = barButtonSmallImageListPos;