Enable graphics context by default

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

diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp
index 37b281c062ea6a04fad625d03c250658377a15c3..ec5d404f5098efa1d2ad914d052f56575dcb4811 100644 (file)
--- a/src/generic/scrlwing.cpp
+++ b/src/generic/scrlwing.cpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        generic/scrolwin.cpp
-// Purpose:     wxGenericScrolledWindow implementation
+// Name:        src/generic/scrlwing.cpp
+// Purpose:     wxScrolledWindow implementation

 // Author:      Julian Smart
 // Modified by: Vadim Zeitlin on 31.08.00: wxScrollHelper allows to implement.
 //              Ron Lee on 10.4.02:  virtual size / auto scrollbars et al.
 // Author:      Julian Smart
 // Modified by: Vadim Zeitlin on 31.08.00: wxScrollHelper allows to implement.
 //              Ron Lee on 10.4.02:  virtual size / auto scrollbars et al.


@@ -18,10 +18,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#ifdef __VMS
-#define XtDisplay XTDISPLAY
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -29,17 +25,21 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

-#if !defined(__WXGTK__) || defined(__WXUNIVERSAL__)
+#include "wx/scrolwin.h"

 
 

-#include "wx/utils.h"
-#include "wx/dcclient.h"
+#ifndef WX_PRECOMP
+    #include "wx/utils.h"
+    #include "wx/panel.h"
+    #include "wx/dcclient.h"
+    #include "wx/timer.h"
+    #include "wx/sizer.h"
+    #include "wx/settings.h"
+#endif

 
 

-#include "wx/scrolwin.h"
-#include "wx/panel.h"
-#if wxUSE_TIMER
-#include "wx/timer.h"
+#ifdef __WXMAC__
+#include "wx/scrolbar.h"

 #endif
 #endif

-#include "wx/sizer.h"
+

 #include "wx/recguard.h"
 
 #ifdef __WXMSW__
 #include "wx/recguard.h"
 
 #ifdef __WXMSW__


@@ -59,8 +59,6 @@
 #endif
 #endif
 
 #endif
 #endif
 

-IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow)
-

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


@@ -226,22 +224,30 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
         // normally, nothing more to do here - except if it was a paint event
         // which wasn't really processed, then we'll try to call our
         // OnDraw() below (from HandleOnPaint)
         // normally, nothing more to do here - except if it was a paint event
         // which wasn't really processed, then we'll try to call our
         // OnDraw() below (from HandleOnPaint)

-        if ( m_hasDrawnWindow )
+        if ( m_hasDrawnWindow || event.IsCommandEvent() )

         {
             return true;
         }
     }
 
         {
             return true;
         }
     }
 

-    // reset the skipped flag to false as it might have been set to true in
-    // ProcessEvent() above
-    event.Skip(false);
-

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

+    if ( evType == wxEVT_CHILD_FOCUS )
+    {
+        m_scrollHelper->HandleOnChildFocus((wxChildFocusEvent &)event);
+        return true;
+    }
+
+    // reset the skipped flag (which might have been set to true in
+    // ProcessEvent() above) to be able to test it below
+    bool wasSkipped = event.GetSkipped();
+    if ( wasSkipped )
+        event.Skip(false);
+

     if ( evType == wxEVT_SCROLLWIN_TOP ||
          evType == wxEVT_SCROLLWIN_BOTTOM ||
          evType == wxEVT_SCROLLWIN_LINEUP ||
     if ( evType == wxEVT_SCROLLWIN_TOP ||
          evType == wxEVT_SCROLLWIN_BOTTOM ||
          evType == wxEVT_SCROLLWIN_LINEUP ||


@@ -251,8 +257,16 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
          evType == wxEVT_SCROLLWIN_THUMBTRACK ||
          evType == wxEVT_SCROLLWIN_THUMBRELEASE )
     {
          evType == wxEVT_SCROLLWIN_THUMBTRACK ||
          evType == wxEVT_SCROLLWIN_THUMBRELEASE )
     {

-            m_scrollHelper->HandleOnScroll((wxScrollWinEvent &)event);
-            return !event.GetSkipped();
+        m_scrollHelper->HandleOnScroll((wxScrollWinEvent &)event);
+        if ( !event.GetSkipped() )
+        {
+            // it makes sense to indicate that we processed the message as we
+            // did scroll the window (and also notice that wxAutoScrollTimer
+            // relies on our return value to stop scrolling when we are at top
+            // or bottom already)
+            processed = true;
+            wasSkipped = false;
+        }

     }
 
     if ( evType == wxEVT_ENTER_WINDOW )
     }
 
     if ( evType == wxEVT_ENTER_WINDOW )


@@ -264,18 +278,29 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
         m_scrollHelper->HandleOnMouseLeave((wxMouseEvent &)event);
     }
 #if wxUSE_MOUSEWHEEL
         m_scrollHelper->HandleOnMouseLeave((wxMouseEvent &)event);
     }
 #if wxUSE_MOUSEWHEEL

+    // Use GTK's own scroll wheel handling in GtkScrolledWindow
+#ifndef __WXGTK20__

     else if ( evType == wxEVT_MOUSEWHEEL )
     {
         m_scrollHelper->HandleOnMouseWheel((wxMouseEvent &)event);
     else if ( evType == wxEVT_MOUSEWHEEL )
     {
         m_scrollHelper->HandleOnMouseWheel((wxMouseEvent &)event);

+        return true;

     }
     }

+#endif

 #endif // wxUSE_MOUSEWHEEL
     else if ( evType == wxEVT_CHAR )
     {
         m_scrollHelper->HandleOnChar((wxKeyEvent &)event);
 #endif // wxUSE_MOUSEWHEEL
     else if ( evType == wxEVT_CHAR )
     {
         m_scrollHelper->HandleOnChar((wxKeyEvent &)event);

-        return !event.GetSkipped();
+        if ( !event.GetSkipped() )
+        {
+            processed = true;
+            wasSkipped = false;
+        }

     }
 
     }
 

-    return false;
+    if ( processed )
+        event.Skip(wasSkipped);
+
+    return processed;

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


@@ -284,6 +309,8 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event)
 
 wxScrollHelper::wxScrollHelper(wxWindow *win)
 {
 
 wxScrollHelper::wxScrollHelper(wxWindow *win)
 {

+    wxASSERT_MSG( win, _T("associated window can't be NULL in wxScrollHelper") );
+

     m_xScrollPixelsPerLine =
     m_yScrollPixelsPerLine =
     m_xScrollPosition =
     m_xScrollPixelsPerLine =
     m_yScrollPixelsPerLine =
     m_xScrollPosition =


@@ -309,8 +336,12 @@ wxScrollHelper::wxScrollHelper(wxWindow *win)
 
     m_handler = NULL;
 
 
     m_handler = NULL;
 

-    if ( win )
-        SetWindow(win);
+    m_win = win;
+    
+    m_win->SetScrollHelper( this );
+
+    // by default, the associated window is also the target window
+    DoSetTargetWindow(win);

 }
 
 wxScrollHelper::~wxScrollHelper()
 }
 
 wxScrollHelper::~wxScrollHelper()


@@ -407,14 +438,10 @@ void wxScrollHelper::DeleteEvtHandler()
     }
 }
 
     }
 }
 

-void wxScrollHelper::SetWindow(wxWindow *win)
+void wxScrollHelper::ResetDrawnFlag()

 {
 {

-    wxCHECK_RET( win, _T("wxScrollHelper needs a window to scroll") );
-
-    m_win = win;
-
-    // by default, the associated window is also the target window
-    DoSetTargetWindow(win);
+    wxCHECK_RET( m_handler, "invalid use of ResetDrawnFlag - no handler?" );
+    m_handler->ResetDrawnFlag();

 }
 
 void wxScrollHelper::DoSetTargetWindow(wxWindow *target)
 }
 
 void wxScrollHelper::DoSetTargetWindow(wxWindow *target)


@@ -467,21 +494,10 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event)
         return;
     }
 
         return;
     }
 

-    int orient = event.GetOrientation();
-    if (orient == wxHORIZONTAL)
-    {
-        m_xScrollPosition += nScrollInc;
-        m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
-    }
-    else
-    {
-        m_yScrollPosition += nScrollInc;
-        m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
-    }
-

     bool needsRefresh = false;
     int dx = 0,
         dy = 0;
     bool needsRefresh = false;
     int dx = 0,
         dy = 0;

+    int orient = event.GetOrientation();

     if (orient == wxHORIZONTAL)
     {
        if ( m_xScrollingEnabled )
     if (orient == wxHORIZONTAL)
     {
        if ( m_xScrollingEnabled )


@@ -505,6 +521,30 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event)
         }
     }
 
         }
     }
 

+    if ( !needsRefresh )
+    {
+        // flush all pending repaints before we change m_{x,y}ScrollPosition, as
+        // otherwise invalidated area could be updated incorrectly later when
+        // ScrollWindow() makes sure they're repainted before scrolling them
+#ifdef __WXMAC__
+        // wxWindowMac is taking care of making sure the update area is correctly
+        // set up, while not forcing an immediate redraw
+#else
+        m_targetWindow->Update();
+#endif
+    }
+
+    if (orient == wxHORIZONTAL)
+    {
+        m_xScrollPosition += nScrollInc;
+        m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
+    }
+    else
+    {
+        m_yScrollPosition += nScrollInc;
+        m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
+    }
+

     if ( needsRefresh )
     {
         m_targetWindow->Refresh(true, GetScrollRect());
     if ( needsRefresh )
     {
         m_targetWindow->Refresh(true, GetScrollRect());


@@ -568,49 +608,36 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
 
     if (orient == wxHORIZONTAL)
     {
 
     if (orient == wxHORIZONTAL)
     {

-        if (m_xScrollPixelsPerLine > 0)
+        if ( m_xScrollPosition + nScrollInc < 0 )

         {
         {

-            if ( m_xScrollPosition + nScrollInc < 0 )
-            {
-                // As -ve as we can go
-                nScrollInc = -m_xScrollPosition;
-            }
-            else // check for the other bound
+            // 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 )

             {
             {

-                const int posMax = m_xScrollLines - m_xScrollLinesPerPage;
-                if ( m_xScrollPosition + nScrollInc > posMax )
-                {
-                    // As +ve as we can go
-                    nScrollInc = posMax - m_xScrollPosition;
-                }
+                // As +ve as we can go
+                nScrollInc = posMax - m_xScrollPosition;

             }
         }
             }
         }

-        else
-            m_targetWindow->Refresh(true, GetScrollRect());

     }
     }

-    else
+    else // wxVERTICAL

     {
     {

-        if ( m_yScrollPixelsPerLine > 0 )
+        if ( m_yScrollPosition + nScrollInc < 0 )

         {
         {

-            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;
-                }
-            }
+            // As -ve as we can go
+            nScrollInc = -m_yScrollPosition;

         }
         }

-        else
+        else // check for the other bound

         {
         {

-            // VZ: why do we do this? (FIXME)
-            m_targetWindow->Refresh(true, GetScrollRect());
+            const int posMax = m_yScrollLines - m_yScrollLinesPerPage;
+            if ( m_yScrollPosition + nScrollInc > posMax )
+            {
+                // As +ve as we can go
+                nScrollInc = posMax - m_yScrollPosition;
+            }

         }
     }
 
         }
     }
 


@@ -651,7 +678,7 @@ void wxScrollHelper::AdjustScrollbars()
     do
     {
         iterationCount ++;
     do
     {
         iterationCount ++;

-        
+

         GetTargetSize(&w, 0);
 
         // scroll lines per page: if 0, no scrolling is needed
         GetTargetSize(&w, 0);
 
         // scroll lines per page: if 0, no scrolling is needed


@@ -820,8 +847,17 @@ void wxScrollHelper::AdjustScrollbars()
 void wxScrollHelper::DoPrepareDC(wxDC& dc)
 {
     wxPoint pt = dc.GetDeviceOrigin();
 void wxScrollHelper::DoPrepareDC(wxDC& dc)
 {
     wxPoint pt = dc.GetDeviceOrigin();

-    dc.SetDeviceOrigin( pt.x - m_xScrollPosition * m_xScrollPixelsPerLine,
-                        pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
+#ifdef __WXGTK__
+    // It may actually be correct to always query
+    // the m_sign from the DC here, but I leve the
+    // #ifdef GTK for now.
+    if (m_win->GetLayoutDirection() == wxLayout_RightToLeft)
+        dc.SetDeviceOrigin( pt.x + m_xScrollPosition * m_xScrollPixelsPerLine,
+                            pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
+    else
+#endif
+        dc.SetDeviceOrigin( pt.x - m_xScrollPosition * m_xScrollPixelsPerLine,
+                            pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );

     dc.SetUserScale( m_scaleX, m_scaleY );
 }
 
     dc.SetUserScale( m_scaleX, m_scaleY );
 }
 


@@ -851,6 +887,15 @@ void wxScrollHelper::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
         *y_unit = m_yScrollPixelsPerLine;
 }
 
         *y_unit = m_yScrollPixelsPerLine;
 }
 

+
+int wxScrollHelper::GetScrollLines( int orient ) const
+{
+    if ( orient == wxHORIZONTAL )
+        return m_xScrollLines;
+    else
+        return m_yScrollLines;
+}
+

 int wxScrollHelper::GetScrollPageSize(int orient) const
 {
     if ( orient == wxHORIZONTAL )
 int wxScrollHelper::GetScrollPageSize(int orient) const
 {
     if ( orient == wxHORIZONTAL )


@@ -878,50 +923,67 @@ 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;
 

-    int w, h;
+    int w = 0, h = 0;

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

+    // compute new position:
+    int new_x = m_xScrollPosition;
+    int new_y = m_yScrollPosition;
+

     if ((x_pos != -1) && (m_xScrollPixelsPerLine))
     {
     if ((x_pos != -1) && (m_xScrollPixelsPerLine))
     {

-        int old_x = m_xScrollPosition;
-        m_xScrollPosition = x_pos;
+        new_x = x_pos;

 
         // Calculate page size i.e. number of scroll units you get on the
         // current client window
 
         // 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 );
+        int noPagePositions = w/m_xScrollPixelsPerLine;

         if (noPagePositions < 1) noPagePositions = 1;
 
         // Correct position if greater than extent of canvas minus
         // the visible portion of it or if below zero
         if (noPagePositions < 1) noPagePositions = 1;
 
         // 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 );
-
-        if (old_x != m_xScrollPosition) {
-            m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
-            m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,
-                                          GetScrollRect() );
-        }
+        new_x = wxMin( m_xScrollLines-noPagePositions, new_x );
+        new_x = wxMax( 0, new_x );

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

-        int old_y = m_yScrollPosition;
-        m_yScrollPosition = y_pos;
+        new_y = y_pos;

 
         // Calculate page size i.e. number of scroll units you get on the
         // current client window
 
         // 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 );
+        int noPagePositions = h/m_yScrollPixelsPerLine;

         if (noPagePositions < 1) noPagePositions = 1;
 
         // Correct position if greater than extent of canvas minus
         // the visible portion of it or if below zero
         if (noPagePositions < 1) noPagePositions = 1;
 
         // 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 );
+        new_y = wxMin( m_yScrollLines-noPagePositions, new_y );
+        new_y = wxMax( 0, new_y );
+    }

 
 

-        if (old_y != m_yScrollPosition) {
-            m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
-            m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,
-                                          GetScrollRect() );
-        }
+    if ( new_x == m_xScrollPosition && new_y == m_yScrollPosition )
+        return; // nothing to do, the position didn't change
+
+    // flush all pending repaints before we change m_{x,y}ScrollPosition, as
+    // otherwise invalidated area could be updated incorrectly later when
+    // ScrollWindow() makes sure they're repainted before scrolling them
+    m_targetWindow->Update();
+
+    // update the position and scroll the window now:
+    if (m_xScrollPosition != new_x)
+    {
+        int old_x = m_xScrollPosition;
+        m_xScrollPosition = new_x;
+        m_win->SetScrollPos( wxHORIZONTAL, new_x );
+        m_targetWindow->ScrollWindow( (old_x-new_x)*m_xScrollPixelsPerLine, 0,
+                                      GetScrollRect() );
+    }
+
+    if (m_yScrollPosition != new_y)
+    {
+        int old_y = m_yScrollPosition;
+        m_yScrollPosition = new_y;
+        m_win->SetScrollPos( wxVERTICAL, new_y );
+        m_targetWindow->ScrollWindow( 0, (old_y-new_y)*m_yScrollPixelsPerLine,
+                                      GetScrollRect() );

     }
 }
 
     }
 }
 


@@ -956,6 +1018,48 @@ void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) co
         *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
 }
 
         *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
 }
 

+// ----------------------------------------------------------------------------
+// geometry
+// ----------------------------------------------------------------------------
+
+bool wxScrollHelper::ScrollLayout()
+{
+    if ( m_win->GetSizer() && m_targetWindow == m_win )
+    {
+        // If we're the scroll target, take into account the
+        // virtual size and scrolled position of the window.
+
+        int x = 0, y = 0, w = 0, h = 0;
+        CalcScrolledPosition(0,0, &x,&y);
+        m_win->GetVirtualSize(&w, &h);
+        m_win->GetSizer()->SetDimension(x, y, w, h);
+        return true;
+    }
+
+    // fall back to default for LayoutConstraints
+    return m_win->wxWindow::Layout();
+}
+
+void wxScrollHelper::ScrollDoSetVirtualSize(int x, int y)
+{
+    m_win->wxWindow::DoSetVirtualSize( x, y );
+    AdjustScrollbars();
+
+    if (m_win->GetAutoLayout())
+        m_win->Layout();
+}
+
+// wxWindow's GetBestVirtualSize returns the actual window size,
+// whereas we want to return the virtual size
+wxSize wxScrollHelper::ScrollGetBestVirtualSize() const
+{
+    wxSize clientSize(m_win->GetClientSize());
+    if ( m_win->GetSizer() )
+        clientSize.IncTo(m_win->GetSizer()->CalcMin());
+
+    return clientSize;
+}
+

 // ----------------------------------------------------------------------------
 // event handlers
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // event handlers
 // ----------------------------------------------------------------------------


@@ -966,7 +1070,7 @@ void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event))
     if ( m_targetWindow->GetAutoLayout() )
     {
         wxSize size = m_targetWindow->GetBestVirtualSize();
     if ( m_targetWindow->GetAutoLayout() )
     {
         wxSize size = m_targetWindow->GetBestVirtualSize();

-        
+

         // This will call ::Layout() and ::AdjustScrollbars()
         m_win->SetVirtualSize( size );
     }
         // This will call ::Layout() and ::AdjustScrollbars()
         m_win->SetVirtualSize( size );
     }


@@ -993,9 +1097,9 @@ void wxScrollHelper::HandleOnPaint(wxPaintEvent& WXUNUSED(event))
 // this they always have the priority
 void wxScrollHelper::HandleOnChar(wxKeyEvent& event)
 {
 // this they always have the priority
 void wxScrollHelper::HandleOnChar(wxKeyEvent& event)
 {

-    int stx, sty,       // view origin
-        szx, szy,       // view size (total)
-        clix, cliy;     // view size (on screen)
+    int stx = 0, sty = 0,       // view origin
+        szx = 0, szy = 0,       // view size (total)
+        clix = 0, cliy = 0;     // view size (on screen)

 
     GetViewStart(&stx, &sty);
     GetTargetSize(&clix, &cliy);
 
     GetViewStart(&stx, &sty);
     GetTargetSize(&clix, &cliy);


@@ -1029,13 +1133,11 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event)
     switch ( event.GetKeyCode() )
     {
         case WXK_PAGEUP:
     switch ( event.GetKeyCode() )
     {
         case WXK_PAGEUP:

-        case WXK_PRIOR:

             dsty = sty - (5 * cliy / 6);
             Scroll(-1, (dsty == -1) ? 0 : dsty);
             break;
 
         case WXK_PAGEDOWN:
             dsty = sty - (5 * cliy / 6);
             Scroll(-1, (dsty == -1) ? 0 : dsty);
             break;
 
         case WXK_PAGEDOWN:

-        case WXK_NEXT:

             Scroll(-1, sty + (5 * cliy / 6));
             break;
 
             Scroll(-1, sty + (5 * cliy / 6));
             break;
 


@@ -1070,18 +1172,18 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event)
 
     if ( m_xScrollPosition != xScrollOld )
     {
 
     if ( m_xScrollPosition != xScrollOld )
     {

-        wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, m_xScrollPosition,
+        wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_xScrollPosition,

                                wxHORIZONTAL);
                                wxHORIZONTAL);

-        event.SetEventObject(m_win);
-        m_win->GetEventHandler()->ProcessEvent(event);
+        evt.SetEventObject(m_win);
+        m_win->GetEventHandler()->ProcessEvent(evt);

     }
 
     if ( m_yScrollPosition != yScrollOld )
     {
     }
 
     if ( m_yScrollPosition != yScrollOld )
     {

-        wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, m_yScrollPosition,
+        wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_yScrollPosition,

                                wxVERTICAL);
                                wxVERTICAL);

-        event.SetEventObject(m_win);
-        m_win->GetEventHandler()->ProcessEvent(event);
+        evt.SetEventObject(m_win);
+        m_win->GetEventHandler()->ProcessEvent(evt);

     }
 }
 
     }
 }
 


@@ -1198,7 +1300,7 @@ void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event)
         wxScrollWinEvent newEvent;
 
         newEvent.SetPosition(0);
         wxScrollWinEvent newEvent;
 
         newEvent.SetPosition(0);

-        newEvent.SetOrientation(wxVERTICAL);
+        newEvent.SetOrientation( event.GetWheelAxis() == 0 ? wxVERTICAL : wxHORIZONTAL);

         newEvent.SetEventObject(m_win);
 
         if (event.IsPageScroll())
         newEvent.SetEventObject(m_win);
 
         if (event.IsPageScroll())


@@ -1227,135 +1329,177 @@ void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event)
 
 #endif // wxUSE_MOUSEWHEEL
 
 
 #endif // wxUSE_MOUSEWHEEL
 

-// ----------------------------------------------------------------------------
-// wxGenericScrolledWindow implementation
-// ----------------------------------------------------------------------------
+void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event)
+{
+    // this event should be processed by all windows in parenthood chain,
+    // e.g. so that nested wxScrolledWindows work correctly
+    event.Skip();

 
 

-IMPLEMENT_DYNAMIC_CLASS(wxGenericScrolledWindow, wxPanel)
+    // find the immediate child under which the window receiving focus is:
+    wxWindow *win = event.GetWindow();

 
 

-BEGIN_EVENT_TABLE(wxGenericScrolledWindow, wxPanel)
-    EVT_PAINT(wxGenericScrolledWindow::OnPaint)
-END_EVENT_TABLE()
+    if ( win == m_targetWindow )
+        return; // nothing to do

 
 

-bool wxGenericScrolledWindow::Create(wxWindow *parent,
-                              wxWindowID id,
-                              const wxPoint& pos,
-                              const wxSize& size,
-                              long style,
-                              const wxString& name)
-{
-    m_targetWindow = this;

 #ifdef __WXMAC__
 #ifdef __WXMAC__

-    MacSetClipChildren( true ) ;
+    if (wxDynamicCast(win, wxScrollBar))
+        return;

 #endif
 
 #endif
 

-    bool ok = wxPanel::Create(parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name);
+    // Fixing ticket: http://trac.wxwidgets.org/ticket/9563
+    // When a child inside a wxControlContainer receives a focus, the
+    // wxControlContainer generates an artificial wxChildFocusEvent for
+    // itself, telling its parent that 'it' received the focus. The effect is
+    // that this->HandleOnChildFocus is called twice, first with the
+    // artificial wxChildFocusEvent and then with the original event.  We need
+    // to ignore the artificial event here or otherwise HandleOnChildFocus
+    // would first scroll the target window to make the entire
+    // wxControlContainer visible and immediately afterwards scroll the target
+    // window again to make the child widget visible. This leads to ugly
+    // flickering when using nested wxPanels/wxScrolledWindows.
+    //
+    // Ignore this event if 'win' is derived from wxControlContainer AND its
+    // parent is the m_targetWindow AND 'win' is not actually reciving the
+    // focus (win != FindFocus).  TODO: This affects all wxControlContainer
+    // objects, but wxControlContainer is not part of the wxWidgets RTTI and
+    // so wxDynamicCast(win, wxControlContainer) does not compile.  Find a way
+    // to determine if 'win' derives from wxControlContainer. Until then,
+    // testing if 'win' derives from wxPanel will probably get >90% of all
+    // cases.
+
+    wxWindow *actual_focus=wxWindow::FindFocus();
+    if (win != actual_focus &&
+        wxDynamicCast(win, wxPanel) != 0 &&
+        win->GetParent() == m_targetWindow)
+        // if win is a wxPanel and receives the focus, it should not be
+        // scrolled into view
+        return; 
+
+    wxSize view(m_targetWindow->GetClientSize());
+
+    // For composite controls such as wxComboCtrl we should try to fit the
+    // entire control inside the visible area of the target window, not just
+    // the focused child of the control. Otherwise we'd make only the textctrl
+    // part of a wxComboCtrl visible and the button would still be outside the
+    // scrolled area.  But do so only if the parent fits *entirely* inside the
+    // scrolled window. In other situations, such as nested wxPanel or
+    // wxScrolledWindows, the parent might be way to big to fit inside the
+    // scrolled window. If that is the case, then make only the focused window
+    // visible
+    if ( win->GetParent() != m_targetWindow)
+    {
+        wxWindow *parent=win->GetParent();
+        wxSize parent_size=parent->GetSize();
+        if (parent_size.GetWidth() <= view.GetWidth() &&
+            parent_size.GetHeight() <= view.GetHeight())
+            // make the immediate parent visible instead of the focused control
+            win=parent; 
+    }

 
 

-    return ok;
-}
+    // if the child is not fully visible, try to scroll it into view:
+    int stepx, stepy;
+    GetScrollPixelsPerUnit(&stepx, &stepy);

 
 

-wxGenericScrolledWindow::~wxGenericScrolledWindow()
-{
-}
+    // 'win' position coordinates are relative to it's parent
+    // convert them so that they are relative to the m_targetWindow viewing area
+    wxRect winrect(m_targetWindow->ScreenToClient(win->GetScreenPosition()),
+                   win->GetSize());

 
 

-bool wxGenericScrolledWindow::Layout()
-{
-    if (GetSizer() && m_targetWindow == this)
-    {
-        // If we're the scroll target, take into account the
-        // virtual size and scrolled position of the window.
-
-        int x, y, w, h;
-        CalcScrolledPosition(0,0, &x,&y);
-        GetVirtualSize(&w, &h);
-        GetSizer()->SetDimension(x, y, w, h);
-        return true;
-    }
+    int startx, starty;
+    GetViewStart(&startx, &starty);

 
 

-    // fall back to default for LayoutConstraints
-    return wxPanel::Layout();
-}
+    // first in vertical direction:
+    if ( stepy > 0 )
+    {
+        int diff = 0;

 
 

-void wxGenericScrolledWindow::DoSetVirtualSize(int x, int y)
-{
-    wxPanel::DoSetVirtualSize( x, y );
-    AdjustScrollbars();
+        if ( winrect.GetTop() < 0 )
+        {
+            diff = winrect.GetTop();
+        }
+        else if ( winrect.GetBottom() > view.y )
+        {
+            diff = winrect.GetBottom() - view.y + 1;
+            // round up to next scroll step if we can't get exact position,
+            // so that the window is fully visible:
+            diff += stepy - 1;
+        }

 
 

-    if (GetAutoLayout())
-        Layout();
-}
+        starty = (starty * stepy + diff) / stepy;
+    }

 
 

-// 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())
+    // then horizontal:
+    if ( stepx > 0 )

     {
     {

-        wxSize minSize( GetSizer()->CalcMin() );
+        int diff = 0;
+
+        if ( winrect.GetLeft() < 0 )
+        {
+            diff = winrect.GetLeft();
+        }
+        else if ( winrect.GetRight() > view.x )
+        {
+            diff = winrect.GetRight() - view.x + 1;
+            // round up to next scroll step if we can't get exact position,
+            // so that the window is fully visible:
+            diff += stepx - 1;
+        }

 
 

-        return wxSize( wxMax( clientSize.x, minSize.x ), wxMax( clientSize.y, minSize.y ) );
+        startx = (startx * stepx + diff) / stepx;

     }
     }

-    else
-        return clientSize;
+
+    Scroll(startx, starty);

 }
 
 }
 

-// 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
+// ----------------------------------------------------------------------------
+// wxScrolled<T> and wxScrolledWindow implementation
+// ----------------------------------------------------------------------------
+
+wxSize wxScrolledT_Helper::FilterBestSize(const wxWindow *win,
+                                          const wxScrollHelperNative *helper,
+                                          const wxSize& origBest)

 {
 {

-    wxSize best;
+    // NB: We don't do this in WX_FORWARD_TO_SCROLL_HELPER, because not
+    //     all scrollable windows should behave like this, only those that
+    //     contain children controls within scrollable area
+    //     (i.e., wxScrolledWindow) and other some scrollable windows may
+    //     have different DoGetBestSize() implementation (e.g. wxTreeCtrl).

 
 

-    if ( GetSizer() )
-    {
-        wxSize b = GetSizer()->GetMinSize();
+    wxSize best = origBest;

 
 

+    if ( win->GetAutoLayout() )
+    {

         // 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;
         // 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);
+        helper->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();
+        // NB: This code used to use *current* size if min size wasn't
+        //     specified, presumably to get some reasonable (i.e., larger than
+        //     minimal) size.  But that's a wrong thing to do in GetBestSize(),
+        //     so we use minimal size as specified. If the app needs some
+        //     minimal size for its scrolled window, it should set it and put
+        //     the window into sizer as expandable so that it can use all space
+        //     available to it.
+        //
+        //     See also http://svn.wxwidgets.org/viewvc/wx?view=rev&revision=45864

 
 

-    // Add any difference between size and client size
-    wxSize diff = GetSize() - GetClientSize();
-    best.x += wxMax(0, diff.x);
-    best.y += wxMax(0, diff.y);
+        wxSize minSize = win->GetMinSize();

 
 

-    return best;
-}
+        if ( ppuX > 0 )
+            best.x = minSize.x + wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);

 
 

-void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event)
-{
-    // the user code didn't really draw the window if we got here, so set this
-    // flag to try to call OnDraw() later
-    m_handler->ResetDrawnFlag();
+        if ( ppuY > 0 )
+            best.y = minSize.y + wxSystemSettings::GetMetric(wxSYS_HSCROLL_Y);
+    }

 
 

-    event.Skip();
+    return best;

 }
 
 #ifdef __WXMSW__
 }
 
 #ifdef __WXMSW__

-WXLRESULT
-wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg,
-                                       WXWPARAM wParam,
-                                       WXLPARAM lParam)
+WXLRESULT wxScrolledT_Helper::FilterMSWWindowProc(WXUINT nMsg, WXLRESULT rc)

 {
 {

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

 #ifndef __WXWINCE__
     // we need to process arrows ourselves for scrolling
     if ( nMsg == WM_GETDLGCODE )
 #ifndef __WXWINCE__
     // we need to process arrows ourselves for scrolling
     if ( nMsg == WM_GETDLGCODE )


@@ -1363,12 +1507,10 @@ wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg,
         rc |= DLGC_WANTARROWS;
     }
 #endif
         rc |= DLGC_WANTARROWS;
     }
 #endif

-

     return rc;
 }
     return rc;
 }

-

 #endif // __WXMSW__
 
 #endif // __WXMSW__
 

-#endif // !wxGTK
-
-// vi:sts=4:sw=4:et
+// NB: skipping wxScrolled<T> in wxRTTI information because being a templte,
+//     it doesn't and can't implement wxRTTI support
+IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)