Fix for crash when opening empty node

[wxWidgets.git] / src / os2 / dnd.cpp

diff --git a/src/os2/dnd.cpp b/src/os2/dnd.cpp
index d4f18cc8099c8d2983a611bbe78ec794740523e5..3a968d35869f5b04dc663798a73cc2f622b57f12 100644 (file)
--- a/src/os2/dnd.cpp
+++ b/src/os2/dnd.cpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Name:        dnd.cpp
+// Name:        src/os2/dnd.cpp
 // Purpose:     wxDropTarget, wxDropSource, wxDataObject implementation
 // Author:      David Webster
 // Modified by:
@@ -9,21 +9,23 @@
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "dnd.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#if wxUSE_DRAG_AND_DROP
 
-#include "wx/window.h"
-#include "wx/app.h"
-#include "wx/gdicmn.h"
 #include "wx/dnd.h"
 
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+    #include "wx/window.h"
+    #include "wx/gdicmn.h"
+#endif
+
 #define INCL_PM
 #define INCL_DOS
 #include <os2.h>
 
-#if wxUSE_DRAG_AND_DROP
-
 // ----------------------------------------------------------------------------
 // global
 // ----------------------------------------------------------------------------
@@ -385,7 +387,7 @@ wxDataFormat wxDropTarget::GetSupportedFormat (
         for (i = 0; i < ulItems; i++)
         {
             pDragItem = ::DrgQueryDragitemPtr(pDataSource, i);
-            if (::DrgVerifyRMF(pDragItem, (PSZ)sMechanism.c_str(), (PSZ)sFormat.c_str()))
+            if (::DrgVerifyRMF(pDragItem, sMechanism.c_str(), sFormat.c_str()))
             {
                 bValid = true;
                 break;
@@ -441,17 +443,12 @@ bool wxDropTarget::OnDrop (
 // wxDropSource
 //-------------------------------------------------------------------------
 
-wxDropSource::wxDropSource (
-  wxWindow*                         pWin
-)
+wxDropSource::wxDropSource ( wxWindow* WXUNUSED(pWin) )
 {
     Init();
 } // end of wxDropSource::wxDropSource
 
-wxDropSource::wxDropSource (
-  wxDataObject&                     rData
-, wxWindow*                         pWin
-)
+wxDropSource::wxDropSource ( wxDataObject& rData, wxWindow* WXUNUSED(pWin) )
 {
     Init();
     SetData(rData);
@@ -549,13 +546,13 @@ void wxDropSource::Init ()
     m_vDragImage.cxOffset       = 0;
     m_vDragImage.cyOffset       = 0;
 
-    HSTR                            hStrType = ::DrgAddStrHandle(DRT_UNKNOWN);
-    HSTR                            hStrRMF;
-    HSTR                            hStrContainer;
-    wxChar                          zFormats[128];
-    wxChar                          zContainer[128];
-    USHORT                          uSize = GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat()) + 1;
-    wxChar*                         pzBuffer = new wxChar[uSize];
+    HSTR    hStrType = ::DrgAddStrHandle(DRT_UNKNOWN);
+    HSTR    hStrRMF;
+    HSTR    hStrContainer;
+    wxChar  zFormats[128];
+    wxChar  zContainer[128];
+    USHORT  uSize = (USHORT)(GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat()) + 1);
+    wxChar* pzBuffer = new wxChar[uSize];
 
     memset(pzBuffer, '\0', GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat()));
     pzBuffer[GetDataObject()->GetDataSize(GetDataObject()->GetPreferredFormat())] = '\0';