X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/cf19b0bd2567b4c3b2a6f9b60587909a7c784a98..caa2490c0fb8053b1d416117a9619695d75af9e4:/src/gtk1/scrolwin.cpp

diff --git a/src/gtk1/scrolwin.cpp b/src/gtk1/scrolwin.cpp
index 46cefd3e0f..79cfe5d3a3 100644
--- a/src/gtk1/scrolwin.cpp
+++ b/src/gtk1/scrolwin.cpp
@@ -1,12 +1,12 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        gtk/scrolwin.cpp
 // Purpose:     wxScrolledWindow implementation
-// Author:      Julian Smart
-// Modified by:
+// Author:      Robert Roebling
+// Modified by: Ron Lee
 // Created:     01/02/97
 // RCS-ID:      $Id$
-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:     wxWindows license
+// Copyright:   (c) Robert Roebling
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
@@ -17,7 +17,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
     #pragma implementation "scrolwin.h"
 #endif
 
@@ -28,13 +28,13 @@
     #pragma hdrstop
 #endif
 
+#include "wx/scrolwin.h"
 #include "wx/utils.h"
 #include "wx/dcclient.h"
-
-#include "wx/gtk/scrolwin.h"
 #include "wx/panel.h"
+#include "wx/sizer.h"
 
-#include <gtk/gtk.h>
+#include "wx/gtk/private.h"
 #include "wx/gtk/win_gtk.h"
 
 // ----------------------------------------------------------------------------
@@ -72,7 +72,10 @@ extern bool g_isIdle;
 // "value_changed" from m_vAdjust
 //-----------------------------------------------------------------------------
 
-static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust, wxScrolledWindow *win )
+extern "C" {
+static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust,
+                                                  SCROLLBAR_CBACK_ARG
+                                                  wxScrolledWindow *win )
 {
     if (g_isIdle)
         wxapp_install_idle_handler();
@@ -80,15 +83,20 @@ static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust, wxScrol
     if (g_blockEventsOnDrag) return;
 
     if (!win->m_hasVMT) return;
-
-    win->GtkVScroll( adjust->value );
+    
+    win->GtkVScroll( adjust->value,
+            GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->vscrollbar) );
+}
 }
 
 //-----------------------------------------------------------------------------
 // "value_changed" from m_hAdjust
 //-----------------------------------------------------------------------------
 
-static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust, wxScrolledWindow *win )
+extern "C" {
+static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust,
+                                                  SCROLLBAR_CBACK_ARG
+                                                  wxScrolledWindow *win )
 {
     if (g_isIdle)
         wxapp_install_idle_handler();
@@ -96,13 +104,16 @@ static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust, wxScrol
     if (g_blockEventsOnDrag) return;
     if (!win->m_hasVMT) return;
 
-    win->GtkHScroll( adjust->value );
+    win->GtkHScroll( adjust->value,
+            GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->hscrollbar) );
+}
 }
 
 //-----------------------------------------------------------------------------
 // "button_press_event" from scrollbar
 //-----------------------------------------------------------------------------
 
+extern "C" {
 static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
                                                  GdkEventButton *gdk_event,
                                                  wxWindowGTK *win)
@@ -111,15 +122,21 @@ static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
         wxapp_install_idle_handler();
 
     g_blockEventsOnScroll = TRUE;
+
+    // FIXME: there is no slider field any more, what was meant here?
+#ifndef __WXGTK20__
     win->m_isScrolling = (gdk_event->window == widget->slider);
+#endif
 
     return FALSE;
 }
+}
 
 //-----------------------------------------------------------------------------
 // "button_release_event" from scrollbar
 //-----------------------------------------------------------------------------
 
+extern "C" {
 static gint gtk_scrollbar_button_release_callback( GtkRange *widget,
                                                    GdkEventButton *WXUNUSED(gdk_event),
                                                    wxWindowGTK *win)
@@ -158,6 +175,7 @@ static gint gtk_scrollbar_button_release_callback( GtkRange *widget,
 
     return FALSE;
 }
+}
 
 //-----------------------------------------------------------------------------
 // InsertChild for wxScrolledWindow
@@ -191,8 +209,6 @@ void wxScrolledWindow::Init()
     m_yScrollingEnabled = TRUE;
     m_xScrollPosition = 0;
     m_yScrollPosition = 0;
-    m_xScrollLines = 0;
-    m_yScrollLines = 0;
     m_xScrollLinesPerPage = 0;
     m_yScrollLinesPerPage = 0;
     m_targetWindow = (wxWindow*) NULL;
@@ -265,13 +281,13 @@ bool wxScrolledWindow::Create(wxWindow *parent,
     m_vAdjust->upper = 1.0;
     m_vAdjust->value = 0.0;
     m_vAdjust->step_increment = 1.0;
-    m_vAdjust->page_increment = 1.0;
+    m_vAdjust->page_increment = 2.0;
     gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
     m_hAdjust->lower = 0.0;
     m_hAdjust->upper = 1.0;
     m_hAdjust->value = 0.0;
     m_hAdjust->step_increment = 1.0;
-    m_hAdjust->page_increment = 1.0;
+    m_hAdjust->page_increment = 2.0;
     gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
 
     // Handlers for new scrollbar values
@@ -279,7 +295,7 @@ bool wxScrolledWindow::Create(wxWindow *parent,
     GtkHConnectEvent();
 
     // these handlers block mouse events to any window during scrolling such as
-    // motion events and prevent GTK and wxWindows from fighting over where the
+    // motion events and prevent GTK and wxWidgets from fighting over where the
     // slider should be
 
     gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_press_event",
@@ -299,10 +315,12 @@ bool wxScrolledWindow::Create(wxWindow *parent,
     if (m_parent)
         m_parent->DoAddChild( this );
 
+    m_focusWidget = m_wxwindow;
+
     PostCreation();
 
     Show( TRUE );
-
+    
     return TRUE;
 }
 
@@ -310,92 +328,224 @@ bool wxScrolledWindow::Create(wxWindow *parent,
 // setting scrolling parameters
 // ----------------------------------------------------------------------------
 
+void wxScrolledWindow::DoSetVirtualSize( int x, int y )
+{
+    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 wxScrolledWindow::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 wxScrolledWindow::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;
+}
+
 /*
  * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
  * noUnitsX/noUnitsY:        : no. units per scrollbar
  */
-void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
-               int noUnitsX, int noUnitsY,
-               int xPos, int yPos, bool noRefresh )
+void wxScrolledWindow::SetScrollbars( int pixelsPerUnitX, int pixelsPerUnitY,
+                                      int noUnitsX, int noUnitsY,
+                                      int xPos, int yPos, bool noRefresh )
 {
-    int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
-    int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
+    int xs, ys;
+    GetViewStart (& xs, & ys);
     
+    int old_x = m_xScrollPixelsPerLine * xs;
+    int old_y = m_yScrollPixelsPerLine * ys;
+
     m_xScrollPixelsPerLine = pixelsPerUnitX;
     m_yScrollPixelsPerLine = pixelsPerUnitY;
-    m_xScrollLines = noUnitsX;
-    m_yScrollLines = noUnitsY;
-    m_xScrollPosition = xPos;
-    m_yScrollPosition = yPos;
 
-    m_hAdjust->lower = 0.0;
-    m_hAdjust->upper = noUnitsX;
-    m_hAdjust->value = xPos;
-    m_hAdjust->step_increment = 1.0;
-    m_hAdjust->page_increment = 2.0;
+    m_hAdjust->value = m_xScrollPosition = xPos;
+    m_vAdjust->value = m_yScrollPosition = yPos;
+
+    // Setting hints here should arguably be deprecated, but without it
+    // a sizer might override this manual scrollbar setting in old code.
+    // m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
+
+    int w = noUnitsX * pixelsPerUnitX;
+    int h = noUnitsY * pixelsPerUnitY;
+    m_targetWindow->SetVirtualSize( w ? w : wxDefaultCoord,
+                                    h ? h : wxDefaultCoord);
 
-    m_vAdjust->lower = 0.0;
-    m_vAdjust->upper = noUnitsY;
-    m_vAdjust->value = yPos;
-    m_vAdjust->step_increment = 1.0;
-    m_vAdjust->page_increment = 2.0;
-    
-    AdjustScrollbars();
-    
     if (!noRefresh)
     {
         int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
         int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
-        
-        m_targetWindow->ScrollWindow( old_x-new_x, old_y-new_y );
+
+        m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
     }
 }
 
 void wxScrolledWindow::AdjustScrollbars()
 {
     int w, h;
-    m_targetWindow->GetClientSize( &w, &h );
+    int vw, vh;
 
+    m_targetWindow->GetClientSize( &w, &h );
+    m_targetWindow->GetVirtualSize( &vw, &vh );
+    
     if (m_xScrollPixelsPerLine == 0)
+    {
+        m_hAdjust->upper = 1.0;
+        m_hAdjust->page_increment = 1.0;
         m_hAdjust->page_size = 1.0;
+    }
     else
-        m_hAdjust->page_size = (w / m_xScrollPixelsPerLine);
+    {
+        m_hAdjust->upper = (vw+m_xScrollPixelsPerLine-1) / m_xScrollPixelsPerLine;
+        m_hAdjust->page_size = w / m_xScrollPixelsPerLine;
+        m_hAdjust->page_increment = w / m_xScrollPixelsPerLine;
+
+        // Special case. When client and virtual size are very close but
+        // the client is big enough, kill scrollbar.
+        
+        if ((m_hAdjust->page_size < m_hAdjust->upper) && (w >= vw)) 
+            m_hAdjust->page_size += 1.0;
+        
+        // If the scrollbar hits the right side, move the window
+        // right to keep it from over extending.
+
+        if ((m_hAdjust->value != 0.0) && (m_hAdjust->value + m_hAdjust->page_size > m_hAdjust->upper))
+        {
+            m_hAdjust->value = m_hAdjust->upper - m_hAdjust->page_size;
+            if (m_hAdjust->value < 0.0)
+                m_hAdjust->value = 0.0;
+                
+            if (GetChildren().GetCount() == 0)
+                m_xScrollPosition = (int)m_hAdjust->value; // This is enough without child windows
+            else
+                gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" ); // Actually scroll window
+        }
+    }
 
     if (m_yScrollPixelsPerLine == 0)
+    {
+        m_vAdjust->upper = 1.0;
+        m_vAdjust->page_increment = 1.0;
         m_vAdjust->page_size = 1.0;
+    }
     else
-        m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
+    {
+        m_vAdjust->upper = (vh+m_yScrollPixelsPerLine-1) / m_yScrollPixelsPerLine;
+        m_vAdjust->page_size = h / m_yScrollPixelsPerLine;
+        m_vAdjust->page_increment = h / m_yScrollPixelsPerLine;
+        
+        if ((m_vAdjust->page_size < m_vAdjust->upper) && (h >= vh)) 
+            m_vAdjust->page_size += 1.0;
 
-    m_xScrollLinesPerPage = (int)(m_hAdjust->page_size + 0.5);
-    m_yScrollLinesPerPage = (int)(m_vAdjust->page_size + 0.5);
+        if ((m_vAdjust->value != 0.0) && (m_vAdjust->value + m_vAdjust->page_size > m_vAdjust->upper))
+        {
+            m_vAdjust->value = m_vAdjust->upper - m_vAdjust->page_size;
+            if (m_vAdjust->value < 0.0)
+                m_vAdjust->value = 0.0;
+                
+            if (GetChildren().GetCount() == 0)
+                m_yScrollPosition = (int)m_vAdjust->value;  
+            else
+                gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
+        }
+    }
+
+    m_xScrollLinesPerPage = (int)(m_hAdjust->page_increment + 0.5);
+    m_yScrollLinesPerPage = (int)(m_vAdjust->page_increment + 0.5);
 
     gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
     gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
 }
 
+
 // ----------------------------------------------------------------------------
 // target window handling
 // ----------------------------------------------------------------------------
 
-void wxScrolledWindow::SetTargetWindow( wxWindow *target )
+void wxScrolledWindow::SetTargetWindow( wxWindow *target, bool WXUNUSED(pushEventHandler) )
 {
     wxASSERT_MSG( target, wxT("target window must not be NULL") );
     m_targetWindow = target;
 }
 
-wxWindow *wxScrolledWindow::GetTargetWindow()
+wxWindow *wxScrolledWindow::GetTargetWindow() const
 {
     return m_targetWindow;
 }
 
 // Override this function if you don't want to have wxScrolledWindow
 // automatically change the origin according to the scroll position.
-void wxScrolledWindow::PrepareDC(wxDC& dc)
+void wxScrolledWindow::DoPrepareDC(wxDC& dc)
 {
     dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
                         -m_yScrollPosition * m_yScrollPixelsPerLine );
 }
 
+void wxScrolledWindow::SetScrollRate( int xstep, int ystep )
+{
+    int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
+    int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
+
+    m_xScrollPixelsPerLine = xstep;
+    m_yScrollPixelsPerLine = ystep;
+
+    int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
+    int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
+
+    m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
+
+    AdjustScrollbars();
+}
+
 void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
 {
     if ( x_unit )
@@ -465,8 +615,7 @@ void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
 
 void wxScrolledWindow::Scroll( int x_pos, int y_pos )
 {
-    if (!m_targetWindow)
-        return;
+    wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
 
     if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
         ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
@@ -484,7 +633,7 @@ void wxScrolledWindow::Scroll( int x_pos, int y_pos )
 
         m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
 
-        // Just update the scrollbar, don't send any wxWindows event
+        // Just update the scrollbar, don't send any wxWidgets event
         GtkHDisconnectEvent();
         gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
         GtkHConnectEvent();
@@ -503,17 +652,18 @@ void wxScrolledWindow::Scroll( int x_pos, int y_pos )
 
         m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
 
-        // Just update the scrollbar, don't send any wxWindows event
+        // Just update the scrollbar, don't send any wxWidgets event
         GtkVDisconnectEvent();
         gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
         GtkVConnectEvent();
     }
 }
 
-void wxScrolledWindow::GtkVScroll( float value )
+// TODO: [VH]Scroll functions should be combined
+
+void wxScrolledWindow::GtkVScroll( float value, unsigned int scroll_type )
 {
-    if (!m_targetWindow)
-        return;
+    wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
 
     if (m_yScrollPixelsPerLine == 0)
         return;
@@ -523,24 +673,16 @@ void wxScrolledWindow::GtkVScroll( float value )
     if (y_pos == m_yScrollPosition)
         return;
 
-    GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
-    GtkRange *range = GTK_RANGE(scrolledWindow->vscrollbar);
-
-    wxEventType command = wxEVT_SCROLLWIN_THUMBTRACK;
-    if      (range->scroll_type == GTK_SCROLL_STEP_BACKWARD) command = wxEVT_SCROLLWIN_LINEUP;
-    else if (range->scroll_type == GTK_SCROLL_STEP_FORWARD)  command = wxEVT_SCROLLWIN_LINEDOWN;
-    else if (range->scroll_type == GTK_SCROLL_PAGE_BACKWARD) command = wxEVT_SCROLLWIN_PAGEUP;
-    else if (range->scroll_type == GTK_SCROLL_PAGE_FORWARD)  command = wxEVT_SCROLLWIN_PAGEDOWN;
+    wxEventType command = GtkScrollWinTypeToWx(scroll_type);
 
     wxScrollWinEvent event( command, y_pos, wxVERTICAL );
     event.SetEventObject( this );
     GetEventHandler()->ProcessEvent( event );
 }
 
-void wxScrolledWindow::GtkHScroll( float value )
+void wxScrolledWindow::GtkHScroll( float value, unsigned int scroll_type )
 {
-    if (!m_targetWindow)
-        return;
+    wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
 
     if (m_xScrollPixelsPerLine == 0)
         return;
@@ -550,14 +692,7 @@ void wxScrolledWindow::GtkHScroll( float value )
     if (x_pos == m_xScrollPosition)
         return;
 
-    GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
-    GtkRange *range = GTK_RANGE(scrolledWindow->hscrollbar);
-
-    wxEventType command = wxEVT_SCROLLWIN_THUMBTRACK;
-    if      (range->scroll_type == GTK_SCROLL_STEP_BACKWARD) command = wxEVT_SCROLLWIN_LINEUP;
-    else if (range->scroll_type == GTK_SCROLL_STEP_FORWARD)  command = wxEVT_SCROLLWIN_LINEDOWN;
-    else if (range->scroll_type == GTK_SCROLL_PAGE_BACKWARD) command = wxEVT_SCROLLWIN_PAGEUP;
-    else if (range->scroll_type == GTK_SCROLL_PAGE_FORWARD)  command = wxEVT_SCROLLWIN_PAGEDOWN;
+    wxEventType command = GtkScrollWinTypeToWx(scroll_type);
 
     wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
     event.SetEventObject( this );
@@ -570,14 +705,6 @@ void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
     m_yScrollingEnabled = y_scroll;
 }
 
-void wxScrolledWindow::GetVirtualSize (int *x, int *y) const
-{
-    if ( x )
-        *x = m_xScrollPixelsPerLine * m_xScrollLines;
-    if ( y )
-        *y = m_yScrollPixelsPerLine * m_yScrollLines;
-}
-
 // Where the current view starts from
 void wxScrolledWindow::GetViewStart (int *x, int *y) const
 {
@@ -587,20 +714,26 @@ void wxScrolledWindow::GetViewStart (int *x, int *y) const
         *y = m_yScrollPosition;
 }
 
-void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
+void wxScrolledWindow::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
 {
+    int xs, ys;
+    GetViewStart (& xs, & ys);
+    
     if ( xx )
-        *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
+        *xx = x - xs * m_xScrollPixelsPerLine;
     if ( yy )
-        *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
+        *yy = y - ys * m_yScrollPixelsPerLine;
 }
 
-void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
+void wxScrolledWindow::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
 {
+    int xs, ys;
+    GetViewStart (& xs, & ys);
+    
     if ( xx )
-        *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
+        *xx = x + xs * m_xScrollPixelsPerLine;
     if ( yy )
-        *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
+        *yy = y + ys * m_yScrollPixelsPerLine;
 }
 
 int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
@@ -619,9 +752,9 @@ int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
     if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
     {
             if (orient == wxHORIZONTAL)
-                nScrollInc = m_xScrollLines - m_xScrollPosition;
+                nScrollInc = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition;
             else
-                nScrollInc = m_yScrollLines - m_yScrollPosition;
+                nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - m_yScrollPosition;
     } else
     if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
     {
@@ -688,7 +821,7 @@ int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
     return nScrollInc;
 }
 
-void wxScrolledWindow::SetScrollPos( int orient, int pos, bool WXUNUSED(refresh) )
+void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh )
 {
     wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
 
@@ -721,14 +854,14 @@ void wxScrolledWindow::SetScrollPos( int orient, int pos, bool WXUNUSED(refresh)
     {
         if (orient == wxHORIZONTAL)
         {
-            // Just update the scrollbar, don't send any wxWindows event
+            // Just update the scrollbar, don't send any wxWidgets event
             GtkHDisconnectEvent();
             gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
             GtkHConnectEvent();
         }
         else
         {
-            // Just update the scrollbar, don't send any wxWindows event
+            // Just update the scrollbar, don't send any wxWidgets event
             GtkVDisconnectEvent();
             gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
             GtkVConnectEvent();
@@ -760,6 +893,23 @@ void wxScrolledWindow::GtkVDisconnectEvent()
         (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
 }
 
+bool wxScrolledWindow::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;
+    }
+    else
+        return wxPanel::Layout();  // fall back to default for LayoutConstraints
+}
+
 // ----------------------------------------------------------------------------
 // event handlers
 // ----------------------------------------------------------------------------
@@ -767,12 +917,17 @@ void wxScrolledWindow::GtkVDisconnectEvent()
 // Default OnSize resets scrollbars, if any
 void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 {
-#if wxUSE_CONSTRAINTS
-    if (GetAutoLayout())
-        Layout();
-#endif
-
-    AdjustScrollbars();
+    if ( m_targetWindow->GetAutoLayout() )
+    {
+        wxSize size = m_targetWindow->GetBestVirtualSize();
+        
+        // This will call ::Layout() and ::AdjustScrollbars()
+        SetVirtualSize( size );
+    }
+    else
+    {
+        AdjustScrollbars();
+    }
 }
 
 // This calls OnDraw, having adjusted the origin according to the current
@@ -795,7 +950,7 @@ void wxScrolledWindow::OnChar(wxKeyEvent& event)
         szx, szy,       // view size (total)
         clix, cliy;     // view size (on screen)
 
-    ViewStart(&stx, &sty);
+    GetViewStart(&stx, &sty);
     GetClientSize(&clix, &cliy);
     GetVirtualSize(&szx, &szy);
 
@@ -824,7 +979,7 @@ void wxScrolledWindow::OnChar(wxKeyEvent& event)
         yScrollOld = GetScrollPos(wxVERTICAL);
 
     int dsty;
-    switch ( event.KeyCode() )
+    switch ( event.GetKeyCode() )
     {
         case WXK_PAGEUP:
         case WXK_PRIOR:
@@ -886,3 +1041,5 @@ void wxScrolledWindow::OnChar(wxKeyEvent& event)
     }
 }
 
+
+// vi:sts=4:sw=4:et