support for iPhone callbacks

[wxWidgets.git] / interface / wx / dcmemory.h

diff --git a/interface/wx/dcmemory.h b/interface/wx/dcmemory.h
index 08985012bc60a870680590c8c54c6550ae58e79c..100fc9beea2025ab36387a0491d8b74eed4771b8 100644 (file)
--- a/interface/wx/dcmemory.h
+++ b/interface/wx/dcmemory.h
@@ -81,13 +81,17 @@ public:
         should use when you select a bitmap because you want to modify it, e.g.
         drawing on this DC.
 
-        Using SelectObjectAsSource() when modifying the bitmap may incurr some
+        Using SelectObjectAsSource() when modifying the bitmap may incur some
         problems related to wxBitmap being a reference counted object (see
         @ref overview_refcount).
 
-        Also, before using the updated bitmap data, make sure to select it out
-        of context first (for example by selecting ::wxNullBitmap into the device
-        context).
+        Before using the updated bitmap data, make sure to select it out of
+        context first either by selecting ::wxNullBitmap into the device
+        context or destroying the device context entirely.
+
+        If the bitmap is already selected in this device context, nothing is
+        done. If it is selected in another context, the function asserts and
+        drawing on the bitmap won't work correctly.
 
         @see wxDC::DrawBitmap()
     */