Add comments explaining the workaround for mingw 3.2.3

[wxWidgets.git] / src / generic / scrlwing.cpp

diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp
index 2e0fff375165559a7c329a730508cda115adfe1b..94a3d59f5f4d29dc5de63f66c0883742f3ec0e43 100644 (file)
--- a/src/generic/scrlwing.cpp
+++ b/src/generic/scrlwing.cpp
@@ -6,8 +6,8 @@
 //              Ron Lee on 10.4.02:  virtual size / auto scrollbars et al.
 // Created:     01/02/97
 // RCS-ID:      $Id$
 //              Ron Lee on 10.4.02:  virtual size / auto scrollbars et al.
 // Created:     01/02/97
 // RCS-ID:      $Id$

-// Copyright:   (c) wxWindows team
-// Licence:     wxWindows license
+// Copyright:   (c) wxWidgets team
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
 /////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================


@@ -18,7 +18,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

     #pragma implementation "genscrolwin.h"
 #endif
 
     #pragma implementation "genscrolwin.h"
 #endif
 


@@ -40,11 +40,15 @@
 
 #include "wx/scrolwin.h"
 #include "wx/panel.h"
 
 #include "wx/scrolwin.h"
 #include "wx/panel.h"

+#if wxUSE_TIMER

 #include "wx/timer.h"
 #include "wx/timer.h"

+#endif

 #include "wx/sizer.h"
 #include "wx/sizer.h"

+#include "wx/recguard.h"

 
 #ifdef __WXMSW__
     #include <windows.h> // for DLGC_WANTARROWS
 
 #ifdef __WXMSW__
     #include <windows.h> // for DLGC_WANTARROWS

+    #include "wx/msw/winundef.h"

 #endif
 
 #ifdef __WXMOTIF__
 #endif
 
 #ifdef __WXMOTIF__


@@ -61,6 +65,11 @@
 
 IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow)
 
 
 IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow)
 

+/*
+    TODO PROPERTIES
+        style wxHSCROLL | wxVSCROLL
+*/
+

 // ----------------------------------------------------------------------------
 // wxScrollHelperEvtHandler: intercept the events from the window and forward
 // them to wxScrollHelper
 // ----------------------------------------------------------------------------
 // wxScrollHelperEvtHandler: intercept the events from the window and forward
 // them to wxScrollHelper


@@ -76,14 +85,17 @@ public:
 
     virtual bool ProcessEvent(wxEvent& event);
 
 
     virtual bool ProcessEvent(wxEvent& event);
 

-    void ResetDrawnFlag() { m_hasDrawnWindow = FALSE; }
+    void ResetDrawnFlag() { m_hasDrawnWindow = false; }

 
 private:
     wxScrollHelper *m_scrollHelper;
 
     bool m_hasDrawnWindow;
 
 private:
     wxScrollHelper *m_scrollHelper;
 
     bool m_hasDrawnWindow;

+
+    DECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler)

 };
 
 };
 

+#if wxUSE_TIMER

 // ----------------------------------------------------------------------------
 // wxAutoScrollTimer: the timer used to generate a stream of scroll events when
 // a captured mouse is held outside the window
 // ----------------------------------------------------------------------------
 // wxAutoScrollTimer: the timer used to generate a stream of scroll events when
 // a captured mouse is held outside the window


@@ -104,6 +116,8 @@ private:
     wxEventType m_eventType;
     int m_pos,
         m_orient;
     wxEventType m_eventType;
     int m_pos,
         m_orient;

+
+    DECLARE_NO_COPY_CLASS(wxAutoScrollTimer)

 };
 
 // ============================================================================
 };
 
 // ============================================================================


@@ -166,6 +180,7 @@ void wxAutoScrollTimer::Notify()
         }
     }
 }
         }
     }
 }

+#endif

 
 // ----------------------------------------------------------------------------
 // wxScrollHelperEvtHandler
 
 // ----------------------------------------------------------------------------
 // wxScrollHelperEvtHandler


@@ -191,7 +206,7 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
     // anything in the window. We set it to true here but reset it to false in
     // wxScrolledWindow::OnPaint() handler (which wouldn't be called if the
     // user code defined OnPaint() in the derived class)
     // anything in the window. We set it to true here but reset it to false in
     // wxScrolledWindow::OnPaint() handler (which wouldn't be called if the
     // user code defined OnPaint() in the derived class)

-    m_hasDrawnWindow = TRUE;
+    m_hasDrawnWindow = true;

 
     // pass it on to the real handler
     bool processed = wxEvtHandler::ProcessEvent(event);
 
     // pass it on to the real handler
     bool processed = wxEvtHandler::ProcessEvent(event);


@@ -207,7 +222,7 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
     {
         m_scrollHelper->HandleOnSize((wxSizeEvent &)event);
 
     {
         m_scrollHelper->HandleOnSize((wxSizeEvent &)event);
 

-        return TRUE;
+        return true;

     }
 
     if ( processed )
     }
 
     if ( processed )


@@ -217,18 +232,18 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
         // OnDraw() below (from HandleOnPaint)
         if ( m_hasDrawnWindow )
         {
         // OnDraw() below (from HandleOnPaint)
         if ( m_hasDrawnWindow )
         {

-            return TRUE;
+            return true;

         }
     }
 
         }
     }
 

-    // reset the skipped flag to FALSE as it might have been set to TRUE in
+    // reset the skipped flag to false as it might have been set to true in

     // ProcessEvent() above
     // ProcessEvent() above

-    event.Skip(FALSE);
+    event.Skip(false);

 
     if ( evType == wxEVT_PAINT )
     {
         m_scrollHelper->HandleOnPaint((wxPaintEvent &)event);
 
     if ( evType == wxEVT_PAINT )
     {
         m_scrollHelper->HandleOnPaint((wxPaintEvent &)event);

-        return TRUE;
+        return true;

     }
 
     if ( evType == wxEVT_SCROLLWIN_TOP ||
     }
 
     if ( evType == wxEVT_SCROLLWIN_TOP ||


@@ -264,7 +279,7 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
         return !event.GetSkipped();
     }
 
         return !event.GetSkipped();
     }
 

-    return FALSE;
+    return false;

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -283,7 +298,7 @@ wxScrollHelper::wxScrollHelper(wxWindow *win)
     m_yScrollLinesPerPage = 0;
 
     m_xScrollingEnabled =
     m_yScrollLinesPerPage = 0;
 
     m_xScrollingEnabled =

-    m_yScrollingEnabled = TRUE;
+    m_yScrollingEnabled = true;

 
     m_scaleX =
     m_scaleY = 1.0;
 
     m_scaleX =
     m_scaleY = 1.0;


@@ -340,14 +355,40 @@ void wxScrollHelper::SetScrollbars(int pixelsPerUnitX,
     m_xScrollPosition = xPos;
     m_yScrollPosition = yPos;
 
     m_xScrollPosition = xPos;
     m_yScrollPosition = yPos;
 

-    m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
+    int w = noUnitsX * pixelsPerUnitX;
+    int h = noUnitsY * pixelsPerUnitY;

 
 

-    if (do_refresh && !noRefresh)
-        m_targetWindow->Refresh(TRUE, GetRect());
+    // For better backward compatibility we set persisting limits
+    // here not just the size.  It makes SetScrollbars 'sticky'
+    // emulating the old non-autoscroll behaviour.
+    //   m_targetWindow->SetVirtualSizeHints( w, h );

 
 

-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately() ;
-#endif
+    // The above should arguably be deprecated, this however we still need.
+
+    // take care not to set 0 virtual size, 0 means that we don't have any
+    // scrollbars and hence we should use the real size instead of the virtual
+    // one which is indicated by using wxDefaultCoord
+    m_targetWindow->SetVirtualSize( w ? w : wxDefaultCoord,
+                                    h ? h : wxDefaultCoord);
+
+    if (do_refresh && !noRefresh)
+        m_targetWindow->Refresh(true, GetScrollRect());
+
+#ifndef __WXUNIVERSAL__
+    // If the target is not the same as the window with the scrollbars,
+    // then we need to update the scrollbars here, since they won't have
+    // been updated by SetVirtualSize().
+    if ( m_targetWindow != m_win )
+#endif // !__WXUNIVERSAL__
+    {
+        AdjustScrollbars();
+    }
+#ifndef __WXUNIVERSAL__
+    else
+    {
+        // otherwise this has been done by AdjustScrollbars, above
+    }
+#endif // !__WXUNIVERSAL__

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -383,6 +424,9 @@ void wxScrollHelper::SetWindow(wxWindow *win)
 void wxScrollHelper::DoSetTargetWindow(wxWindow *target)
 {
     m_targetWindow = target;
 void wxScrollHelper::DoSetTargetWindow(wxWindow *target)
 {
     m_targetWindow = target;

+#ifdef __WXMAC__
+    target->MacSetClipChildren( true ) ;
+#endif

 
     // install the event handler which will intercept the events we're
     // interested in (but only do it for our real window, not the target window
 
     // install the event handler which will intercept the events we're
     // interested in (but only do it for our real window, not the target window


@@ -439,7 +483,7 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event)
         m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
     }
 
         m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
     }
 

-    bool needsRefresh = FALSE;
+    bool needsRefresh = false;

     int dx = 0,
         dy = 0;
     if (orient == wxHORIZONTAL)
     int dx = 0,
         dy = 0;
     if (orient == wxHORIZONTAL)


@@ -450,7 +494,7 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event)
        }
        else
        {
        }
        else
        {

-           needsRefresh = TRUE;
+           needsRefresh = true;

        }
     }
     else
        }
     }
     else


@@ -461,22 +505,18 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event)
         }
         else
         {
         }
         else
         {

-            needsRefresh = TRUE;
+            needsRefresh = true;

         }
     }
 
     if ( needsRefresh )
     {
         }
     }
 
     if ( needsRefresh )
     {

-        m_targetWindow->Refresh(TRUE, GetRect());
+        m_targetWindow->Refresh(true, GetScrollRect());

     }
     else
     {
     }
     else
     {

-        m_targetWindow->ScrollWindow(dx, dy, GetRect());
+        m_targetWindow->ScrollWindow(dx, dy, GetScrollRect());

     }
     }

-
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately() ;
-#endif

 }
 
 int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
 }
 
 int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)


@@ -534,41 +574,48 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
     {
         if (m_xScrollPixelsPerLine > 0)
         {
     {
         if (m_xScrollPixelsPerLine > 0)
         {

-            int w, h;
-            GetTargetSize(&w, &h);
-
-            int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
-            int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 );
-            if (noPositions < 0)
-                noPositions = 0;
-
-            if ( (m_xScrollPosition + nScrollInc) < 0 )
-                nScrollInc = -m_xScrollPosition; // As -ve as we can go
-            else if ( (m_xScrollPosition + nScrollInc) > noPositions )
-                nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go
+            if ( m_xScrollPosition + nScrollInc < 0 )
+            {
+                // As -ve as we can go
+                nScrollInc = -m_xScrollPosition;
+            }
+            else // check for the other bound
+            {
+                const int posMax = m_xScrollLines - m_xScrollLinesPerPage;
+                if ( m_xScrollPosition + nScrollInc > posMax )
+                {
+                    // As +ve as we can go
+                    nScrollInc = posMax - m_xScrollPosition;
+                }
+            }

         }
         else
         }
         else

-            m_targetWindow->Refresh(TRUE, GetRect());
+            m_targetWindow->Refresh(true, GetScrollRect());

     }
     else
     {
     }
     else
     {

-        if (m_yScrollPixelsPerLine > 0)
+        if ( m_yScrollPixelsPerLine > 0 )

         {
         {

-            int w, h;
-            GetTargetSize(&w, &h);
-
-            int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
-            int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 );
-            if (noPositions < 0)
-                noPositions = 0;
-
-            if ( (m_yScrollPosition + nScrollInc) < 0 )
-                nScrollInc = -m_yScrollPosition; // As -ve as we can go
-            else if ( (m_yScrollPosition + nScrollInc) > noPositions )
-                nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go
+            if ( m_yScrollPosition + nScrollInc < 0 )
+            {
+                // As -ve as we can go
+                nScrollInc = -m_yScrollPosition;
+            }
+            else // check for the other bound
+            {
+                const int posMax = m_yScrollLines - m_yScrollLinesPerPage;
+                if ( m_yScrollPosition + nScrollInc > posMax )
+                {
+                    // As +ve as we can go
+                    nScrollInc = posMax - m_yScrollPosition;
+                }
+            }

         }
         else
         }
         else

-            m_targetWindow->Refresh(TRUE, GetRect());
+        {
+            // VZ: why do we do this? (FIXME)
+            m_targetWindow->Refresh(true, GetScrollRect());
+        }

     }
 
     return nScrollInc;
     }
 
     return nScrollInc;


@@ -577,9 +624,18 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
 // Adjust the scrollbars - new version.
 void wxScrollHelper::AdjustScrollbars()
 {
 // Adjust the scrollbars - new version.
 void wxScrollHelper::AdjustScrollbars()
 {

-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif
+    static wxRecursionGuardFlag s_flagReentrancy;
+    wxRecursionGuard guard(s_flagReentrancy);
+    if ( guard.IsInside() )
+    {
+        // don't reenter AdjustScrollbars() while another call to
+        // AdjustScrollbars() is in progress because this may lead to calling
+        // ScrollWindow() twice and this can really happen under MSW if
+        // SetScrollbar() call below adds or removes the scrollbar which
+        // changes the window size and hence results in another
+        // AdjustScrollbars() call
+        return;
+    }

 
     int w = 0, h = 0;
     int oldw, oldh;
 
     int w = 0, h = 0;
     int oldw, oldh;


@@ -587,72 +643,126 @@ void wxScrollHelper::AdjustScrollbars()
     int oldXScroll = m_xScrollPosition;
     int oldYScroll = m_yScrollPosition;
 
     int oldXScroll = m_xScrollPosition;
     int oldYScroll = m_yScrollPosition;
 

-    do {
+    // VZ: at least under Windows this loop is useless because when scrollbars
+    //     [dis]appear we get a WM_SIZE resulting in another call to
+    //     AdjustScrollbars() anyhow. As it doesn't seem to do any harm I leave
+    //     it here for now but it would be better to ensure that all ports
+    //     generate EVT_SIZE when scrollbars [dis]appear, emulating it if
+    //     necessary, and remove it later
+    do
+    {

         GetTargetSize(&w, 0);
 
         GetTargetSize(&w, 0);
 

-        if (m_xScrollPixelsPerLine == 0)
+        // scroll lines per page: if 0, no scrolling is needed
+        int linesPerPage;
+
+        if ( m_xScrollPixelsPerLine == 0 )

         {
         {

+            // scrolling is disabled

             m_xScrollLines = 0;
             m_xScrollPosition = 0;
             m_xScrollLines = 0;
             m_xScrollPosition = 0;

-            m_win->SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
+            linesPerPage = 0;

         }
         }

-        else
+        else // might need scrolling

         {
         {

-            m_xScrollLines = m_targetWindow->GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine;
+            // Round up integer division to catch any "leftover" client space.
+            const int wVirt = m_targetWindow->GetVirtualSize().GetWidth();
+            m_xScrollLines = (wVirt + m_xScrollPixelsPerLine - 1) / m_xScrollPixelsPerLine;

 
             // Calculate page size i.e. number of scroll units you get on the
 
             // Calculate page size i.e. number of scroll units you get on the

-            // current client window
-            int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
-            if (noPagePositions < 1) noPagePositions = 1;
-            if ( noPagePositions > m_xScrollLines )
-                noPagePositions = m_xScrollLines;
-
-            // Correct position if greater than extent of canvas minus
-            // the visible portion of it or if below zero
-            m_xScrollPosition = wxMin( m_xScrollLines - noPagePositions, m_xScrollPosition);
-            m_xScrollPosition = wxMax( 0, m_xScrollPosition );
-
-            m_win->SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
-            // The amount by which we scroll when paging
-            SetScrollPageSize(wxHORIZONTAL, noPagePositions);
+            // current client window.
+            linesPerPage = w / m_xScrollPixelsPerLine;
+
+            // Special case. When client and virtual size are very close but
+            // the client is big enough, kill scrollbar.
+            if ((linesPerPage < m_xScrollLines) && (w >= wVirt)) ++linesPerPage;
+
+            if (linesPerPage >= m_xScrollLines)
+            {
+                // we're big enough to not need scrolling
+                linesPerPage =
+                m_xScrollLines =
+                m_xScrollPosition = 0;
+            }
+            else // we do need a scrollbar
+            {
+                if ( linesPerPage < 1 )
+                    linesPerPage = 1;
+
+                // Correct position if greater than extent of canvas minus
+                // the visible portion of it or if below zero
+                const int posMax = m_xScrollLines - linesPerPage;
+                if ( m_xScrollPosition > posMax )
+                    m_xScrollPosition = posMax;
+                else if ( m_xScrollPosition < 0 )
+                    m_xScrollPosition = 0;
+            }

         }
 
         }
 

+        m_win->SetScrollbar(wxHORIZONTAL, m_xScrollPosition,
+                            linesPerPage, m_xScrollLines);
+
+        // The amount by which we scroll when paging
+        SetScrollPageSize(wxHORIZONTAL, linesPerPage);
+

         GetTargetSize(0, &h);
 
         GetTargetSize(0, &h);
 

-        if (m_yScrollPixelsPerLine == 0)
+        if ( m_yScrollPixelsPerLine == 0 )

         {
         {

+            // scrolling is disabled

             m_yScrollLines = 0;
             m_yScrollPosition = 0;
             m_yScrollLines = 0;
             m_yScrollPosition = 0;

-            m_win->SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE);
+            linesPerPage = 0;

         }
         }

-        else
+        else // might need scrolling

         {
         {

-            m_yScrollLines = m_targetWindow->GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine;
+            // Round up integer division to catch any "leftover" client space.
+            const int hVirt = m_targetWindow->GetVirtualSize().GetHeight();
+            m_yScrollLines = ( hVirt + m_yScrollPixelsPerLine - 1 ) / m_yScrollPixelsPerLine;

 
             // Calculate page size i.e. number of scroll units you get on the
 
             // Calculate page size i.e. number of scroll units you get on the

-            // current client window
-            int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
-            if (noPagePositions < 1) noPagePositions = 1;
-            if ( noPagePositions > m_yScrollLines )
-                noPagePositions = m_yScrollLines;
-
-            // Correct position if greater than extent of canvas minus
-            // the visible portion of it or if below zero
-            m_yScrollPosition = wxMin( m_yScrollLines - noPagePositions, m_yScrollPosition );
-            m_yScrollPosition = wxMax( 0, m_yScrollPosition );
-
-            m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
-            // The amount by which we scroll when paging
-            SetScrollPageSize(wxVERTICAL, noPagePositions);
+            // current client window.
+            linesPerPage = h / m_yScrollPixelsPerLine;
+
+            // Special case. When client and virtual size are very close but
+            // the client is big enough, kill scrollbar.
+            if ((linesPerPage < m_yScrollLines) && (h >= hVirt)) ++linesPerPage;
+
+            if (linesPerPage >= m_yScrollLines)
+            {
+                // we're big enough to not need scrolling
+                linesPerPage =
+                m_yScrollLines =
+                m_yScrollPosition = 0;
+            }
+            else // we do need a scrollbar
+            {
+                if ( linesPerPage < 1 )
+                    linesPerPage = 1;
+
+                // Correct position if greater than extent of canvas minus
+                // the visible portion of it or if below zero
+                const int posMax = m_yScrollLines - linesPerPage;
+                if ( m_yScrollPosition > posMax )
+                    m_yScrollPosition = posMax;
+                else if ( m_yScrollPosition < 0 )
+                    m_yScrollPosition = 0;
+            }

         }
 
         }
 

-        // If a scrollbar (dis)appeared as a result of this, adjust them again.
+        m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition,
+                            linesPerPage, m_yScrollLines);

 
 

+        // The amount by which we scroll when paging
+        SetScrollPageSize(wxVERTICAL, linesPerPage);
+
+
+        // If a scrollbar (dis)appeared as a result of this, adjust them again.

         oldw = w;
         oldh = h;
 
         GetTargetSize( &w, &h );
         oldw = w;
         oldh = h;
 
         GetTargetSize( &w, &h );

-    } while ( w != oldw && h != oldh );
+    } while ( w != oldw || h != oldh );

 
 #ifdef __WXMOTIF__
     // Sorry, some Motif-specific code to implement a backing pixmap
 
 #ifdef __WXMOTIF__
     // Sorry, some Motif-specific code to implement a backing pixmap


@@ -691,23 +801,19 @@ void wxScrollHelper::AdjustScrollbars()
     {
        if (m_xScrollingEnabled)
             m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0,
     {
        if (m_xScrollingEnabled)
             m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0,

-                                          GetRect() );
+                                          GetScrollRect() );

        else
        else

-            m_targetWindow->Refresh(TRUE, GetRect());
+            m_targetWindow->Refresh(true, GetScrollRect());

     }
 
     if (oldYScroll != m_yScrollPosition)
     {
         if (m_yScrollingEnabled)
             m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition),
     }
 
     if (oldYScroll != m_yScrollPosition)
     {
         if (m_yScrollingEnabled)
             m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition),

-                                          GetRect() );
+                                          GetScrollRect() );

         else
         else

-            m_targetWindow->Refresh(TRUE, GetRect());
+            m_targetWindow->Refresh(true, GetScrollRect());

     }
     }

-
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif

 }
 
 void wxScrollHelper::DoPrepareDC(wxDC& dc)
 }
 
 void wxScrollHelper::DoPrepareDC(wxDC& dc)


@@ -771,10 +877,6 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
     if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
         ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
 
     if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
         ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
 

-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif
-

     int w, h;
     GetTargetSize(&w, &h);
 
     int w, h;
     GetTargetSize(&w, &h);
 


@@ -796,7 +898,7 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
         if (old_x != m_xScrollPosition) {
             m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
             m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,
         if (old_x != m_xScrollPosition) {
             m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
             m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,

-                                          GetRect() );
+                                          GetScrollRect() );

         }
     }
     if ((y_pos != -1) && (m_yScrollPixelsPerLine))
         }
     }
     if ((y_pos != -1) && (m_yScrollPixelsPerLine))


@@ -817,14 +919,9 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
         if (old_y != m_yScrollPosition) {
             m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
             m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,
         if (old_y != m_yScrollPosition) {
             m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
             m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,

-                                          GetRect() );
+                                          GetScrollRect() );

         }
     }
         }
     }

-
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif
-

 }
 
 void wxScrollHelper::EnableScrolling (bool x_scroll, bool y_scroll)
 }
 
 void wxScrollHelper::EnableScrolling (bool x_scroll, bool y_scroll)


@@ -842,6 +939,15 @@ void wxScrollHelper::GetViewStart (int *x, int *y) const
         *y = m_yScrollPosition;
 }
 
         *y = m_yScrollPosition;
 }
 

+#if WXWIN_COMPATIBILITY_2_2
+
+void wxScrollHelper::ViewStart(int *x, int *y) const
+{
+    GetViewStart( x, y );
+}
+
+#endif // WXWIN_COMPATIBILITY_2_2
+

 void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
 {
     if ( xx )
 void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
 {
     if ( xx )


@@ -865,15 +971,17 @@ void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) co
 // Default OnSize resets scrollbars, if any
 void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event))
 {
 // Default OnSize resets scrollbars, if any
 void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event))
 {

-    if( m_targetWindow != m_win )
-        m_targetWindow->SetVirtualSize( m_targetWindow->GetClientSize() );
-
-    m_win->SetVirtualSize( m_win->GetClientSize() );
-
-#if wxUSE_CONSTRAINTS
-    if (m_win->GetAutoLayout())
-        m_win->Layout();
-#endif
+    if ( m_targetWindow->GetAutoLayout() )
+    {
+        wxSize size = m_targetWindow->GetBestVirtualSize();
+        
+        // This will call ::Layout() and ::AdjustScrollbars()
+        m_win->SetVirtualSize( size );
+    }
+    else
+    {
+        AdjustScrollbars();
+    }

 }
 
 // This calls OnDraw, having adjusted the origin according to the current
 }
 
 // This calls OnDraw, having adjusted the origin according to the current


@@ -926,7 +1034,7 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event)
         yScrollOld = m_yScrollPosition;
 
     int dsty;
         yScrollOld = m_yScrollPosition;
 
     int dsty;

-    switch ( event.KeyCode() )
+    switch ( event.GetKeyCode() )

     {
         case WXK_PAGEUP:
         case WXK_PRIOR:
     {
         case WXK_PAGEUP:
         case WXK_PRIOR:


@@ -999,11 +1107,13 @@ bool wxScrollHelper::SendAutoScrollEvents(wxScrollWinEvent& event) const
 
 void wxScrollHelper::StopAutoScrolling()
 {
 
 void wxScrollHelper::StopAutoScrolling()
 {

+#if wxUSE_TIMER

     if ( m_timerAutoScroll )
     {
         delete m_timerAutoScroll;
         m_timerAutoScroll = (wxTimer *)NULL;
     }
     if ( m_timerAutoScroll )
     {
         delete m_timerAutoScroll;
         m_timerAutoScroll = (wxTimer *)NULL;
     }

+#endif

 }
 
 void wxScrollHelper::HandleOnMouseEnter(wxMouseEvent& event)
 }
 
 void wxScrollHelper::HandleOnMouseEnter(wxMouseEvent& event)


@@ -1065,6 +1175,7 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event)
         if ( !m_targetWindow->HasScrollbar(orient) )
             return;
 
         if ( !m_targetWindow->HasScrollbar(orient) )
             return;
 

+#if wxUSE_TIMER

         delete m_timerAutoScroll;
         m_timerAutoScroll = new wxAutoScrollTimer
                                 (
         delete m_timerAutoScroll;
         m_timerAutoScroll = new wxAutoScrollTimer
                                 (


@@ -1075,6 +1186,9 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event)
                                     orient
                                 );
         m_timerAutoScroll->Start(50); // FIXME: make configurable
                                     orient
                                 );
         m_timerAutoScroll->Start(50); // FIXME: make configurable

+#else
+        wxUnusedVar(pos);
+#endif

     }
 }
 
     }
 }
 


@@ -1088,26 +1202,34 @@ void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event)
 
     if (lines != 0)
     {
 
     if (lines != 0)
     {

-        lines *= event.GetLinesPerAction();

 
         wxScrollWinEvent newEvent;
 
         newEvent.SetPosition(0);
         newEvent.SetOrientation(wxVERTICAL);
 
         wxScrollWinEvent newEvent;
 
         newEvent.SetPosition(0);
         newEvent.SetOrientation(wxVERTICAL);

-        newEvent.m_eventObject = m_win;
-        if (lines > 0)
-            newEvent.m_eventType = wxEVT_SCROLLWIN_LINEUP;
-        else
-            newEvent.m_eventType = wxEVT_SCROLLWIN_LINEDOWN;
+        newEvent.SetEventObject(m_win);
+
+        if (event.IsPageScroll())
+        {
+            if (lines > 0)
+                newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEUP);
+            else
+                newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEDOWN);

 
 

-        int times = abs(lines);
-        for (; times > 0; times --)

             m_win->GetEventHandler()->ProcessEvent(newEvent);
             m_win->GetEventHandler()->ProcessEvent(newEvent);

+        }
+        else
+        {
+            lines *= event.GetLinesPerAction();
+            if (lines > 0)
+                newEvent.SetEventType(wxEVT_SCROLLWIN_LINEUP);
+            else
+                newEvent.SetEventType(wxEVT_SCROLLWIN_LINEDOWN);

 
 

-        /* Old Way */
-        // int vsx, vsy;
-        // GetViewStart(&vsx, &vsy);
-        // Scroll(-1, vsy - lines);
+            int times = abs(lines);
+            for (; times > 0; times--)
+                m_win->GetEventHandler()->ProcessEvent(newEvent);
+        }

     }
 }
 
     }
 }
 


@@ -1131,8 +1253,11 @@ bool wxGenericScrolledWindow::Create(wxWindow *parent,
                               const wxString& name)
 {
     m_targetWindow = this;
                               const wxString& name)
 {
     m_targetWindow = this;

+#ifdef __WXMAC__
+    MacSetClipChildren( true ) ;
+#endif

 
 

-    bool ok = wxPanel::Create(parent, id, pos, size, style, name);
+    bool ok = wxPanel::Create(parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name);

 
     return ok;
 }
 
     return ok;
 }


@@ -1152,17 +1277,74 @@ bool wxGenericScrolledWindow::Layout()
         CalcScrolledPosition(0,0, &x,&y);
         GetVirtualSize(&w, &h);
         GetSizer()->SetDimension(x, y, w, h);
         CalcScrolledPosition(0,0, &x,&y);
         GetVirtualSize(&w, &h);
         GetSizer()->SetDimension(x, y, w, h);

-        return TRUE;
+        return true;

     }
 
     // fall back to default for LayoutConstraints
     return wxPanel::Layout();
 }
 
     }
 
     // fall back to default for LayoutConstraints
     return wxPanel::Layout();
 }
 

-void wxGenericScrolledWindow::DoSetVirtualSize( int x, int y )
+void wxGenericScrolledWindow::DoSetVirtualSize(int x, int y)

 {
     wxPanel::DoSetVirtualSize( x, y );
     AdjustScrollbars();
 {
     wxPanel::DoSetVirtualSize( x, y );
     AdjustScrollbars();

+
+    if (GetAutoLayout())
+        Layout();
+}
+
+// wxWindow's GetBestVirtualSize returns the actual window size,
+// whereas we want to return the virtual size
+wxSize wxGenericScrolledWindow::GetBestVirtualSize() const
+{
+    wxSize  clientSize( GetClientSize() );
+    if (GetSizer())
+    {
+        wxSize minSize( GetSizer()->CalcMin() );
+
+        return wxSize( wxMax( clientSize.x, minSize.x ), wxMax( clientSize.y, minSize.y ) );
+    }
+    else
+        return clientSize;
+}
+
+// return the size best suited for the current window
+// (this isn't a virtual size, this is a sensible size for the window)
+wxSize wxGenericScrolledWindow::DoGetBestSize() const
+{
+    wxSize best;
+
+    if ( GetSizer() )
+    {
+        wxSize b = GetSizer()->GetMinSize();
+
+        // Only use the content to set the window size in the direction
+        // where there's no scrolling; otherwise we're going to get a huge
+        // window in the direction in which scrolling is enabled
+        int ppuX, ppuY;
+        GetScrollPixelsPerUnit(& ppuX, & ppuY);
+
+        wxSize minSize;
+        if ( GetMinSize().IsFullySpecified() )
+            minSize = GetMinSize();
+        else
+            minSize = GetSize();
+
+        if (ppuX > 0)
+            b.x = minSize.x;
+        if (ppuY > 0)
+            b.y = minSize.y;
+        best = b;
+    }
+    else
+        return wxWindow::DoGetBestSize();
+
+    // Add any difference between size and client size
+    wxSize diff = GetSize() - GetClientSize();
+    best.x += wxMax(0, diff.x);
+    best.y += wxMax(0, diff.y);
+
+    return best;

 }
 
 void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event)
 }
 
 void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event)


@@ -1175,42 +1357,26 @@ void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event)
 }
 
 #ifdef __WXMSW__
 }
 
 #ifdef __WXMSW__

-long
+WXLRESULT

 wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg,
                                        WXWPARAM wParam,
                                        WXLPARAM lParam)
 {
 wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg,
                                        WXWPARAM wParam,
                                        WXLPARAM lParam)
 {

-    long rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam);
+    WXLRESULT rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam);

 
 

+#ifndef __WXWINCE__

     // we need to process arrows ourselves for scrolling
     if ( nMsg == WM_GETDLGCODE )
     {
         rc |= DLGC_WANTARROWS;
     }
     // we need to process arrows ourselves for scrolling
     if ( nMsg == WM_GETDLGCODE )
     {
         rc |= DLGC_WANTARROWS;
     }

+#endif

 
     return rc;
 }
 
 #endif // __WXMSW__
 
 
     return rc;
 }
 
 #endif // __WXMSW__
 

-#if WXWIN_COMPATIBILITY
-
-void wxGenericScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const
-{
-      *x_page = GetScrollPageSize(wxHORIZONTAL);
-      *y_page = GetScrollPageSize(wxVERTICAL);
-}
-
-void wxGenericScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const
-{
-    if ( xx )
-        *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine);
-    if ( yy )
-        *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine);
-}
-
-#endif // WXWIN_COMPATIBILITY
-

 #endif // !wxGTK
 
 // vi:sts=4:sw=4:et
 #endif // !wxGTK
 
 // vi:sts=4:sw=4:et