+ wxASSERT_MSG( (bitmap.GetWidth() >= m_width && bitmap.GetHeight() == m_height)
+ || (m_width == 0 && m_height == 0),
+ wxT("invalid bitmap size in wxImageList: this might work ")
+ wxT("on this platform but definitely won't under Windows.") );
+
+ const int index = int(m_images.GetCount());
+
+ if (bitmap.IsKindOf(wxCLASSINFO(wxIcon)))
+ {
+ m_images.Append( new wxIcon( (const wxIcon&) bitmap ) );
+ }
+ else
+ {
+ // Mimic behaviour of Windows ImageList_Add that automatically breaks up the added
+ // bitmap into sub-images of the correct size
+ if (m_width > 0 && bitmap.GetWidth() > m_width && bitmap.GetHeight() >= m_height)
+ {
+ int numImages = bitmap.GetWidth() / m_width;
+ for (int subIndex = 0; subIndex < numImages; subIndex++)
+ {
+ wxRect rect(m_width * subIndex, 0, m_width, m_height);
+ wxBitmap tmpBmp = bitmap.GetSubBitmap(rect);
+ m_images.Append( new wxBitmap(tmpBmp) );
+ }
+ }
+ else
+ {
+ m_images.Append( new wxBitmap(bitmap) );
+ }
+ }
+
+ if (m_width == 0 && m_height == 0)
+ {
+ m_width = bitmap.GetWidth();
+ m_height = bitmap.GetHeight();
+ }
+
+ return index;