Ensure there is valid context for DrawRectangle

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

diff --git a/src/msw/scrolbar.cpp b/src/msw/scrolbar.cpp
index 54a5cf7e27ea9b163d0f7a8b0b2982b5808df05d..33b0a0c58188276593a3ff5b4a2a51303289ad52 100644 (file)
--- a/src/msw/scrolbar.cpp
+++ b/src/msw/scrolbar.cpp
@@ -27,62 +27,6 @@
 
 #include "wx/msw/private.h"
 
 
 #include "wx/msw/private.h"
 

-#if wxUSE_EXTENDED_RTTI
-WX_DEFINE_FLAGS( wxScrollBarStyle )
-
-wxBEGIN_FLAGS( wxScrollBarStyle )
-    // new style border flags, we put them first to
-    // use them for streaming out
-    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
-    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
-    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
-    wxFLAGS_MEMBER(wxBORDER_RAISED)
-    wxFLAGS_MEMBER(wxBORDER_STATIC)
-    wxFLAGS_MEMBER(wxBORDER_NONE)
-
-    // old style border flags
-    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
-    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
-    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
-    wxFLAGS_MEMBER(wxRAISED_BORDER)
-    wxFLAGS_MEMBER(wxSTATIC_BORDER)
-    wxFLAGS_MEMBER(wxBORDER)
-
-    // standard window styles
-    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
-    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
-    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
-    wxFLAGS_MEMBER(wxWANTS_CHARS)
-    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
-    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
-    wxFLAGS_MEMBER(wxVSCROLL)
-    wxFLAGS_MEMBER(wxHSCROLL)
-
-    wxFLAGS_MEMBER(wxSB_HORIZONTAL)
-    wxFLAGS_MEMBER(wxSB_VERTICAL)
-
-wxEND_FLAGS( wxScrollBarStyle )
-
-IMPLEMENT_DYNAMIC_CLASS_XTI(wxScrollBar, wxControl,"wx/scrolbar.h")
-
-wxBEGIN_PROPERTIES_TABLE(wxScrollBar)
-    wxEVENT_RANGE_PROPERTY( Scroll , wxEVT_SCROLL_TOP , wxEVT_SCROLL_CHANGED , wxScrollEvent )
-
-    wxPROPERTY( ThumbPosition , int , SetThumbPosition, GetThumbPosition, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    wxPROPERTY( Range , int , SetRange, GetRange, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    wxPROPERTY( ThumbSize , int , SetThumbSize, GetThumbSize, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    wxPROPERTY( PageSize , int , SetPageSize, GetPageSize, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    wxPROPERTY_FLAGS( WindowStyle , wxScrollBarStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
-wxEND_PROPERTIES_TABLE()
-
-wxBEGIN_HANDLERS_TABLE(wxScrollBar)
-wxEND_HANDLERS_TABLE()
-
-wxCONSTRUCTOR_5( wxScrollBar , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size , long , WindowStyle )
-#else
-IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
-#endif
-

 // Scrollbar
 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
            const wxPoint& pos,
 // Scrollbar
 bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
            const wxPoint& pos,


@@ -119,7 +63,6 @@ bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
         return false;
     }
 
         return false;
     }
 

-    int position = scrollInfo.nPos;

     int maxPos = scrollInfo.nMax;
 
     // A page size greater than one has the effect of reducing the effective
     int maxPos = scrollInfo.nMax;
 
     // A page size greater than one has the effect of reducing the effective


@@ -128,61 +71,54 @@ bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
     if ( m_pageSize > 1 )
         maxPos -= (m_pageSize - 1);
 
     if ( m_pageSize > 1 )
         maxPos -= (m_pageSize - 1);
 

+    int position = scrollInfo.nPos;

     wxEventType scrollEvent = wxEVT_NULL;
     wxEventType scrollEvent = wxEVT_NULL;

-
-    int nScrollInc;

     switch ( wParam )
     {
         case SB_TOP:
     switch ( wParam )
     {
         case SB_TOP:

-            nScrollInc = maxPos - position;
+            position = 0;

             scrollEvent = wxEVT_SCROLL_TOP;
             break;
 
         case SB_BOTTOM:
             scrollEvent = wxEVT_SCROLL_TOP;
             break;
 
         case SB_BOTTOM:

-            nScrollInc = -position;
+            position = maxPos;

             scrollEvent = wxEVT_SCROLL_BOTTOM;
             break;
 
         case SB_LINEUP:
             scrollEvent = wxEVT_SCROLL_BOTTOM;
             break;
 
         case SB_LINEUP:

-            nScrollInc = -1;
+            position--;

             scrollEvent = wxEVT_SCROLL_LINEUP;
             break;
 
         case SB_LINEDOWN:
             scrollEvent = wxEVT_SCROLL_LINEUP;
             break;
 
         case SB_LINEDOWN:

-            nScrollInc = 1;
+            position++;

             scrollEvent = wxEVT_SCROLL_LINEDOWN;
             break;
 
         case SB_PAGEUP:
             scrollEvent = wxEVT_SCROLL_LINEDOWN;
             break;
 
         case SB_PAGEUP:

-            nScrollInc = -GetPageSize();
+            position -= GetPageSize();

             scrollEvent = wxEVT_SCROLL_PAGEUP;
             break;
 
         case SB_PAGEDOWN:
             scrollEvent = wxEVT_SCROLL_PAGEUP;
             break;
 
         case SB_PAGEDOWN:

-            nScrollInc = GetPageSize();
+            position += GetPageSize();

             scrollEvent = wxEVT_SCROLL_PAGEDOWN;
             break;
 
         case SB_THUMBPOSITION:
         case SB_THUMBTRACK:
             scrollEvent = wxEVT_SCROLL_PAGEDOWN;
             break;
 
         case SB_THUMBPOSITION:
         case SB_THUMBTRACK:

-            nScrollInc = scrollInfo.nTrackPos - position;
+            position = scrollInfo.nTrackPos;

             scrollEvent = wParam == SB_THUMBPOSITION ? wxEVT_SCROLL_THUMBRELEASE
                                                      : wxEVT_SCROLL_THUMBTRACK;
             break;
 
         case SB_ENDSCROLL:
             scrollEvent = wParam == SB_THUMBPOSITION ? wxEVT_SCROLL_THUMBRELEASE
                                                      : wxEVT_SCROLL_THUMBTRACK;
             break;
 
         case SB_ENDSCROLL:

-            nScrollInc = 0;

             scrollEvent = wxEVT_SCROLL_CHANGED;
             break;
             scrollEvent = wxEVT_SCROLL_CHANGED;
             break;

-
-        default:
-            nScrollInc = 0;

     }
 
     }
 

-    if ( nScrollInc )
+    if ( position != scrollInfo.nPos )

     {
     {

-        position += nScrollInc;
-

         if ( position < 0 )
             position = 0;
         if ( position > maxPos )
         if ( position < 0 )
             position = 0;
         if ( position > maxPos )


@@ -220,9 +156,7 @@ void wxScrollBar::SetThumbPosition(int viewStart)
 
 int wxScrollBar::GetThumbPosition(void) const
 {
 
 int wxScrollBar::GetThumbPosition(void) const
 {

-    SCROLLINFO scrollInfo;
-    wxZeroMemory(scrollInfo);
-    scrollInfo.cbSize = sizeof(SCROLLINFO);
+    WinStruct<SCROLLINFO> scrollInfo;

     scrollInfo.fMask = SIF_POS;
 
     if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
     scrollInfo.fMask = SIF_POS;
 
     if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )