Ensure there is valid context for DrawRectangle

[wxWidgets.git] / src / msw / cursor.cpp

diff --git a/src/msw/cursor.cpp b/src/msw/cursor.cpp
index fbcf62dd75eb14d145e72c83acab157ea3358ff8..ec9b67c9690cbf01d3a48be504bcb679c05eb30c 100644 (file)
--- a/src/msw/cursor.cpp
+++ b/src/msw/cursor.cpp
@@ -105,8 +105,7 @@ public:
 
     virtual void OnExit()
     {
-        delete gs_globalCursor;
-        gs_globalCursor = NULL;
+        wxDELETE(gs_globalCursor);
     }
 };
 
@@ -237,12 +236,13 @@ wxCursor::wxCursor(const wxString& filename,
     switch ( kind )
     {
         case wxBITMAP_TYPE_CUR_RESOURCE:
-            hcursor = ::LoadCursor(wxGetInstance(), filename.fn_str());
+            hcursor = ::LoadCursor(wxGetInstance(), filename.t_str());
             break;
 
 #ifndef __WXWINCE__
+        case wxBITMAP_TYPE_ANI:
         case wxBITMAP_TYPE_CUR:
-            hcursor = ::LoadCursorFromFile(filename.fn_str());
+            hcursor = ::LoadCursorFromFile(filename.t_str());
             break;
 #endif
 
@@ -276,6 +276,45 @@ wxCursor::wxCursor(const wxString& filename,
     }
 }
 
+namespace
+{
+
+void ReverseBitmap(HBITMAP bitmap, int width, int height)
+{
+    MemoryHDC hdc;
+    SelectInHDC selBitmap(hdc, bitmap);
+    ::StretchBlt(hdc, width - 1, 0, -width, height,
+                 hdc, 0, 0, width, height, SRCCOPY);
+}
+
+HCURSOR CreateReverseCursor(HCURSOR cursor)
+{
+    ICONINFO info;
+    if ( !::GetIconInfo(cursor, &info) )
+        return NULL;
+
+    HCURSOR cursorRev = NULL;
+
+    BITMAP bmp;
+    if ( ::GetObject(info.hbmMask, sizeof(bmp), &bmp) )
+    {
+        ReverseBitmap(info.hbmMask, bmp.bmWidth, bmp.bmHeight);
+        if ( info.hbmColor )
+            ReverseBitmap(info.hbmColor, bmp.bmWidth, bmp.bmHeight);
+        info.xHotspot = (DWORD)bmp.bmWidth - 1 - info.xHotspot;
+
+        cursorRev = ::CreateIconIndirect(&info);
+    }
+
+    ::DeleteObject(info.hbmMask);
+    if ( info.hbmColor )
+        ::DeleteObject(info.hbmColor);
+
+    return cursorRev;
+}
+
+} // anonymous namespace
+
 // Cursors by stock number
 void wxCursor::InitFromStock(wxStockCursor idCursor)
 {
@@ -294,15 +333,8 @@ void wxCursor::InitFromStock(wxStockCursor idCursor)
         { false, wxT("WXCURSOR_RIGHT_ARROW")  }, // wxCURSOR_RIGHT_ARROW
         { false, wxT("WXCURSOR_BULLSEYE")     }, // wxCURSOR_BULLSEYE
         {  true, IDC_ARROW                   }, // WXCURSOR_CHAR
-
-        // Displays as an I-beam on XP, so use a cursor file
-//        {  true, IDC_CROSS                   }, // WXCURSOR_CROSS
-        {  false, wxT("WXCURSOR_CROSS")       }, // WXCURSOR_CROSS
-
-        // See special handling below for wxCURSOR_HAND
-//        { false, wxT("WXCURSOR_HAND")         }, // wxCURSOR_HAND
+        {  true, IDC_CROSS                   }, // WXCURSOR_CROSS
         {  true, IDC_HAND                    }, // wxCURSOR_HAND
-
         {  true, IDC_IBEAM                   }, // WXCURSOR_IBEAM
         {  true, IDC_ARROW                   }, // WXCURSOR_LEFT_BUTTON
         { false, wxT("WXCURSOR_MAGNIFIER")    }, // wxCURSOR_MAGNIFIER
@@ -347,8 +379,27 @@ void wxCursor::InitFromStock(wxStockCursor idCursor)
         deleteLater = true;
     }
 
+    if ( !hcursor && idCursor == wxCURSOR_RIGHT_ARROW)
+    {
+        hcursor = ::LoadCursor(NULL, IDC_ARROW);
+        if ( hcursor )
+        {
+            hcursor = CreateReverseCursor(hcursor);
+            deleteLater = true;
+        }
+    }
+
     if ( !hcursor )
     {
+        if ( !stdCursor.isStd )
+        {
+            // it may be not obvious to the programmer why did loading fail,
+            // try to help by pointing to the by far the most probable reason
+            wxFAIL_MSG(wxT("Loading a cursor defined by wxWidgets failed, ")
+                       wxT("did you include include/wx/msw/wx.rc file from ")
+                       wxT("your resource file?"));
+        }
+
         wxLogLastError(wxT("LoadCursor"));
     }
     else
@@ -383,7 +434,7 @@ const wxCursor *wxGetGlobalCursor()
 
 void wxSetCursor(const wxCursor& cursor)
 {
-    if ( cursor.Ok() )
+    if ( cursor.IsOk() )
     {
         ::SetCursor(GetHcursorOf(cursor));