X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9eddec696f06d65a80e7339b2fae14fcb55f8383..17d98558b35b75e3cad68d96841b4fa5a0c7e6ee:/src/msw/scrolbar.cpp

diff --git a/src/msw/scrolbar.cpp b/src/msw/scrolbar.cpp
index ea7ab3a869..f45e294396 100644
--- a/src/msw/scrolbar.cpp
+++ b/src/msw/scrolbar.cpp
@@ -18,12 +18,13 @@
 
 #if wxUSE_SCROLLBAR
 
+#include "wx/scrolbar.h"
+
 #ifndef WX_PRECOMP
     #include "wx/utils.h"
     #include "wx/settings.h"
 #endif
 
-#include "wx/scrolbar.h"
 #include "wx/msw/private.h"
 
 #if wxUSE_EXTENDED_RTTI
@@ -105,46 +106,20 @@ wxScrollBar::~wxScrollBar(void)
 }
 
 bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
-                              WXWORD pos, WXHWND WXUNUSED(control))
+                              WXWORD WXUNUSED(pos), WXHWND WXUNUSED(control))
 {
-    // current and max positions
-    int position,
-        maxPos, trackPos = pos;
+    // don't use pos parameter because it is limited to 16 bits, get the full
+    // 32 bit position from the control itself instead
+    WinStruct<SCROLLINFO> scrollInfo;
+    scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_TRACKPOS;
 
-    wxUnusedVar(trackPos);
-
-    // when we're dragging the scrollbar we can't use pos parameter because it
-    // is limited to 16 bits
-    // JACS: now always using GetScrollInfo, since there's no reason
-    // not to
-//    if ( wParam == SB_THUMBPOSITION || wParam == SB_THUMBTRACK )
-    {
-        SCROLLINFO scrollInfo;
-        wxZeroMemory(scrollInfo);
-        scrollInfo.cbSize = sizeof(SCROLLINFO);
-
-        // also get the range if we call GetScrollInfo() anyhow -- this is less
-        // expensive than call it once here and then call GetScrollRange()
-        // below
-        scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_TRACKPOS;
-
-        if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
-        {
-            wxLogLastError(_T("GetScrollInfo"));
-        }
-
-        trackPos = scrollInfo.nTrackPos;
-        position = scrollInfo.nPos;
-        maxPos = scrollInfo.nMax;
-    }
-#if 0
-    else
+    if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
     {
-        position = ::GetScrollPos((HWND) control, SB_CTL);
-        int minPos;
-        ::GetScrollRange((HWND) control, SB_CTL, &minPos, &maxPos);
+        wxLogLastError(wxT("GetScrollInfo"));
+        return false;
     }
-#endif
+
+    int maxPos = scrollInfo.nMax;
 
     // A page size greater than one has the effect of reducing the effective
     // range, therefore the range has already been boosted artificially - so
@@ -152,64 +127,54 @@ bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
     if ( m_pageSize > 1 )
         maxPos -= (m_pageSize - 1);
 
+    int position = scrollInfo.nPos;
     wxEventType scrollEvent = wxEVT_NULL;
-
-    int nScrollInc;
     switch ( wParam )
     {
         case SB_TOP:
-            nScrollInc = maxPos - position;
+            position = 0;
             scrollEvent = wxEVT_SCROLL_TOP;
             break;
 
         case SB_BOTTOM:
-            nScrollInc = -position;
+            position = maxPos;
             scrollEvent = wxEVT_SCROLL_BOTTOM;
             break;
 
         case SB_LINEUP:
-            nScrollInc = -1;
+            position--;
             scrollEvent = wxEVT_SCROLL_LINEUP;
             break;
 
         case SB_LINEDOWN:
-            nScrollInc = 1;
+            position++;
             scrollEvent = wxEVT_SCROLL_LINEDOWN;
             break;
 
         case SB_PAGEUP:
-            nScrollInc = -GetPageSize();
+            position -= GetPageSize();
             scrollEvent = wxEVT_SCROLL_PAGEUP;
             break;
 
         case SB_PAGEDOWN:
-            nScrollInc = GetPageSize();
+            position += GetPageSize();
             scrollEvent = wxEVT_SCROLL_PAGEDOWN;
             break;
 
         case SB_THUMBPOSITION:
-            nScrollInc = trackPos - position;
-            scrollEvent = wxEVT_SCROLL_THUMBRELEASE;
-            break;
-
         case SB_THUMBTRACK:
-            nScrollInc = trackPos - position;
-            scrollEvent = wxEVT_SCROLL_THUMBTRACK;
+            position = scrollInfo.nTrackPos;
+            scrollEvent = wParam == SB_THUMBPOSITION ? wxEVT_SCROLL_THUMBRELEASE
+                                                     : wxEVT_SCROLL_THUMBTRACK;
             break;
 
         case SB_ENDSCROLL:
-            nScrollInc = 0;
             scrollEvent = wxEVT_SCROLL_CHANGED;
             break;
-
-        default:
-            nScrollInc = 0;
     }
 
-    if ( nScrollInc )
+    if ( position != scrollInfo.nPos )
     {
-        position += nScrollInc;
-
         if ( position < 0 )
             position = 0;
         if ( position > maxPos )
@@ -230,7 +195,7 @@ bool wxScrollBar::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
     event.SetPosition(position);
     event.SetEventObject( this );
 
-    return GetEventHandler()->ProcessEvent(event);
+    return HandleWindowEvent(event);
 }
 
 void wxScrollBar::SetThumbPosition(int viewStart)
@@ -254,10 +219,9 @@ int wxScrollBar::GetThumbPosition(void) const
 
     if ( !::GetScrollInfo(GetHwnd(), SB_CTL, &scrollInfo) )
     {
-        wxLogLastError(_T("GetScrollInfo"));
+        wxLogLastError(wxT("GetScrollInfo"));
     }
     return scrollInfo.nPos;
-//    return ::GetScrollPos((HWND)m_hWnd, SB_CTL);
 }
 
 void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize,