X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f644bc116bbe46d6ab609a44c05835dc4d87ba02..fe8635a7e78715344f0f4b6abc9d797931429333:/src/generic/imaglist.cpp

diff --git a/src/generic/imaglist.cpp b/src/generic/imaglist.cpp
index 5f342b70c4..4fbf79d9df 100644
--- a/src/generic/imaglist.cpp
+++ b/src/generic/imaglist.cpp
@@ -20,9 +20,11 @@
 
 #include "wx/generic/imaglist.h"
 
-#include "wx/icon.h"
-#include "wx/image.h"
-#include "wx/dc.h"
+#ifndef WX_PRECOMP
+    #include "wx/dc.h"
+    #include "wx/icon.h"
+    #include "wx/image.h"
+#endif
 
 //-----------------------------------------------------------------------------
 //  wxImageList
@@ -69,15 +71,34 @@ bool wxGenericImageList::Create()
 
 int wxGenericImageList::Add( const wxBitmap &bitmap )
 {
-    wxASSERT_MSG( (bitmap.GetWidth() == m_width && bitmap.GetHeight() == m_height)
+    wxASSERT_MSG( (bitmap.GetWidth() >= m_width && bitmap.GetHeight() == m_height)
                   || (m_width == 0 && m_height == 0),
                   _T("invalid bitmap size in wxImageList: this might work ")
                   _T("on this platform but definitely won't under Windows.") );
 
     if (bitmap.IsKindOf(CLASSINFO(wxIcon)))
+    {
         m_images.Append( new wxIcon( (const wxIcon&) bitmap ) );
+    }
     else
-        m_images.Append( new wxBitmap(bitmap) );
+    {
+        // Mimic behavior 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)
     {
@@ -198,7 +219,7 @@ bool wxGenericImageList::Replace( int index, const wxBitmap &bitmap, const wxBit
         m_images.Erase( node );
         m_images.Insert( next, newBitmap );
     }
-    
+
     if (mask.Ok())
         newBitmap->SetMask(new wxMask(mask));
 
@@ -258,5 +279,6 @@ bool wxGenericImageList::Draw( int index, wxDC &dc, int x, int y,
     return true;
 }
 
-#endif // wxUSE_IMAGLIST
 #endif // __WXPALMOS__
+
+#endif // wxUSE_IMAGLIST