X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/aafe4488331fd2900a5ba19c7897d5a10385dcd2..26364344e58ae9c384965ff25c6920a75c55184e:/src/gtk/scrolwin.cpp

diff --git a/src/gtk/scrolwin.cpp b/src/gtk/scrolwin.cpp
index 548a400065..2125b4d388 100644
--- a/src/gtk/scrolwin.cpp
+++ b/src/gtk/scrolwin.cpp
@@ -1,12 +1,12 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        generic/scrolwin.cpp
+// 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"
 
 // ----------------------------------------------------------------------------
@@ -42,6 +42,7 @@
 // ----------------------------------------------------------------------------
 
 BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
+    EVT_SCROLLWIN(wxScrolledWindow::OnScroll)
     EVT_SIZE(wxScrolledWindow::OnSize)
     EVT_PAINT(wxScrolledWindow::OnPaint)
     EVT_CHAR(wxScrolledWindow::OnChar)
@@ -58,6 +59,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)
 //-----------------------------------------------------------------------------
 
 extern bool       g_blockEventsOnDrag;
+extern bool       g_blockEventsOnScroll;
 
 //-----------------------------------------------------------------------------
 // idle system
@@ -70,7 +72,9 @@ extern bool g_isIdle;
 // "value_changed" from m_vAdjust
 //-----------------------------------------------------------------------------
 
-static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust, wxScrolledWindow *win )
+static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust,
+                                                  SCROLLBAR_CBACK_ARG
+                                                  wxScrolledWindow *win )
 {
     if (g_isIdle)
         wxapp_install_idle_handler();
@@ -78,15 +82,18 @@ 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 )
+static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust,
+                                                  SCROLLBAR_CBACK_ARG
+                                                  wxScrolledWindow *win )
 {
     if (g_isIdle)
         wxapp_install_idle_handler();
@@ -94,7 +101,72 @@ 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
+//-----------------------------------------------------------------------------
+
+static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
+                                                 GdkEventButton *gdk_event,
+                                                 wxWindowGTK *win)
+{
+    if (g_isIdle)
+        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
+//-----------------------------------------------------------------------------
+
+static gint gtk_scrollbar_button_release_callback( GtkRange *widget,
+                                                   GdkEventButton *WXUNUSED(gdk_event),
+                                                   wxWindowGTK *win)
+{
+//  don't test here as we can release the mouse while being over
+//  a different window than the slider
+//
+//    if (gdk_event->window != widget->slider) return FALSE;
+
+    g_blockEventsOnScroll = FALSE;
+
+    if (win->m_isScrolling)
+    {
+        wxEventType command = wxEVT_SCROLLWIN_THUMBRELEASE;
+        int value = -1;
+        int dir = -1;
+
+        GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(win->m_widget);
+        if (widget == GTK_RANGE(scrolledWindow->hscrollbar))
+        {
+            value = (int)(win->m_hAdjust->value+0.5);
+            dir = wxHORIZONTAL;
+        }
+        if (widget == GTK_RANGE(scrolledWindow->vscrollbar))
+        {
+            value = (int)(win->m_vAdjust->value+0.5);
+            dir = wxVERTICAL;
+        }
+
+        wxScrollWinEvent event( command, value, dir );
+        event.SetEventObject( win );
+        win->GetEventHandler()->ProcessEvent( event );
+    }
+
+    win->m_isScrolling = FALSE;
+
+    return FALSE;
 }
 
 //-----------------------------------------------------------------------------
@@ -103,8 +175,8 @@ static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust, wxScrol
 
 static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
 {
-    /* the window might have been scrolled already, do we
-       have to adapt the position */
+    // The window might have been scrolled already, do we
+    // have to adapt the position.
     GtkPizza *pizza = GTK_PIZZA(parent->m_wxwindow);
     child->m_x += pizza->xoffset;
     child->m_y += pizza->yoffset;
@@ -121,7 +193,7 @@ static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
 // wxScrolledWindow creation
 // ----------------------------------------------------------------------------
 
-wxScrolledWindow::wxScrolledWindow()
+void wxScrolledWindow::Init()
 {
     m_xScrollPixelsPerLine = 0;
     m_yScrollPixelsPerLine = 0;
@@ -129,11 +201,12 @@ wxScrolledWindow::wxScrolledWindow()
     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;
+    m_scaleX = 1.0;
+    m_scaleY = 1.0;
+    m_hasScrolling = TRUE;
 }
 
 bool wxScrolledWindow::Create(wxWindow *parent,
@@ -143,6 +216,8 @@ bool wxScrolledWindow::Create(wxWindow *parent,
                               long style,
                               const wxString& name)
 {
+    Init();
+
     if (!PreCreation( parent, pos, size ) ||
         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
     {
@@ -151,17 +226,6 @@ bool wxScrolledWindow::Create(wxWindow *parent,
     }
 
     m_insertCallback = wxInsertChildInScrolledWindow;
-    
-    m_xScrollPixelsPerLine = 0;
-    m_yScrollPixelsPerLine = 0;
-    m_xScrollingEnabled = TRUE;
-    m_yScrollingEnabled = TRUE;
-    m_xScrollPosition = 0;
-    m_yScrollPosition = 0;
-    m_xScrollLines = 0;
-    m_yScrollLines = 0;
-    m_xScrollLinesPerPage = 0;
-    m_yScrollLinesPerPage = 0;
 
     m_targetWindow = this;
 
@@ -209,115 +273,205 @@ 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" );
 
-    // these handlers get notified when screen updates are required either when
-    // scrolling or when the window size (and therefore scrollbar configuration)
-    // has changed
-    gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
-          (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
-    gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
-          (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
+    // Handlers for new scrollbar values
+    GtkVConnectEvent();
+    GtkHConnectEvent();
+
+    // these handlers block mouse events to any window during scrolling such as
+    // 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",
+          (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
+
+    gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_press_event",
+          (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
+
+    gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_release_event",
+          (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
+
+    gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_release_event",
+          (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
 
     gtk_widget_show( m_wxwindow );
 
     if (m_parent)
         m_parent->DoAddChild( this );
 
+    m_focusWidget = m_wxwindow;
+
     PostCreation();
 
     Show( TRUE );
-
+    
     return TRUE;
 }
 
-wxScrolledWindow::~wxScrolledWindow()
-{
-}
-
 // ----------------------------------------------------------------------------
 // setting scrolling parameters
 // ----------------------------------------------------------------------------
 
+void wxScrolledWindow::DoSetVirtualSize( int x, int y )
+{
+    wxPanel::DoSetVirtualSize( x, y );
+    AdjustScrollbars();
+
+    if (GetAutoLayout())
+        Layout();
+}
+
 /*
  * 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 xs, ys;
+    GetViewStart (& xs, & ys);
+    
+    int old_x = m_xScrollPixelsPerLine * xs;
+    int old_y = m_yScrollPixelsPerLine * ys;
+
     m_xScrollPixelsPerLine = pixelsPerUnitX;
     m_yScrollPixelsPerLine = pixelsPerUnitY;
-    m_xScrollPosition = xPos;
-    m_yScrollPosition = yPos;
-    m_xScrollLines = noUnitsX;
-    m_yScrollLines = noUnitsY;
-    
-    m_hAdjust->lower = 0.0;
-    m_hAdjust->upper = noUnitsX;
-    m_hAdjust->value = xPos;
-    m_hAdjust->step_increment = 1.0;
-    m_hAdjust->page_increment = 1.0;
 
-    m_vAdjust->lower = 0.0;
-    m_vAdjust->upper = noUnitsY;
-    m_vAdjust->value = yPos;
-    m_vAdjust->step_increment = 1.0;
-    m_vAdjust->page_increment = 1.0;
-    
-    AdjustScrollbars();
+    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 );
+
+    m_targetWindow->SetVirtualSize( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
+
+    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 );
+    }
 }
 
 void wxScrolledWindow::AdjustScrollbars()
 {
     int 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;
+        m_hAdjust->page_increment = (w / m_xScrollPixelsPerLine);
+        m_hAdjust->page_size = m_hAdjust->page_increment;
+
+        // 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;
+        m_vAdjust->page_increment = (h / m_yScrollPixelsPerLine);
+        m_vAdjust->page_size = m_vAdjust->page_increment;
+
+        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 )
@@ -342,76 +496,133 @@ void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
         m_yScrollLinesPerPage = pageSize;
 }
 
-/*
- * Scroll to given position (scroll position, not pixel position)
- */
+void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
+{
+    int orient = event.GetOrientation();
+
+    int nScrollInc = CalcScrollInc(event);
+    if (nScrollInc == 0) return;
+
+    if (orient == wxHORIZONTAL)
+    {
+        int newPos = m_xScrollPosition + nScrollInc;
+        SetScrollPos(wxHORIZONTAL, newPos, TRUE );
+    }
+    else
+    {
+        int newPos = m_yScrollPosition + nScrollInc;
+        SetScrollPos(wxVERTICAL, newPos, TRUE );
+    }
+
+    if (orient == wxHORIZONTAL)
+    {
+        m_xScrollPosition += nScrollInc;
+    }
+    else
+    {
+        m_yScrollPosition += nScrollInc;
+    }
+
+    if (orient == wxHORIZONTAL)
+    {
+       if (m_xScrollingEnabled)
+            m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
+       else
+            m_targetWindow->Refresh();
+    }
+    else
+    {
+        if (m_yScrollingEnabled)
+            m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
+        else
+            m_targetWindow->Refresh();
+    }
+}
+
 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;
 
     if ((x_pos != -1) && (m_xScrollPixelsPerLine))
     {
+        int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+        if (x_pos > max) x_pos = max;
+        if (x_pos < 0) x_pos = 0;
+
         int old_x = m_xScrollPosition;
         m_xScrollPosition = x_pos;
         m_hAdjust->value = x_pos;
-        
+
         m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
-        
+
+        // Just update the scrollbar, don't send any wxWidgets event
+        GtkHDisconnectEvent();
         gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
+        GtkHConnectEvent();
     }
-    
+
     if ((y_pos != -1) && (m_yScrollPixelsPerLine))
     {
+        int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+        if (y_pos > max) y_pos = max;
+        if (y_pos < 0) y_pos = 0;
+
         int old_y = m_yScrollPosition;
         m_yScrollPosition = y_pos;
         m_vAdjust->value = y_pos;
-        
+
         m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
-        
+
+        // 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;
-    
+
     int y_pos = (int)(value+0.5);
-    
+
     if (y_pos == m_yScrollPosition)
         return;
-    
-    int old_y = m_yScrollPosition;
-    m_yScrollPosition = y_pos;
 
-    m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
+    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;
-    
+
     int x_pos = (int)(value+0.5);
-    
+
     if (x_pos == m_xScrollPosition)
         return;
-    
-    int old_x = m_xScrollPosition;
-    m_xScrollPosition = x_pos;
 
-    m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
+    wxEventType command = GtkScrollWinTypeToWx(scroll_type);
+
+    wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
+    event.SetEventObject( this );
+    GetEventHandler()->ProcessEvent( event );
 }
 
 void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
@@ -420,14 +631,6 @@ 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
 {
@@ -437,20 +640,200 @@ 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)
+{
+    int pos = event.GetPosition();
+    int orient = event.GetOrientation();
+
+    int nScrollInc = 0;
+    if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = - m_xScrollPosition;
+            else
+                nScrollInc = - m_yScrollPosition;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition;
+            else
+                nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - m_yScrollPosition;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
+    {
+            nScrollInc = -1;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
+    {
+            nScrollInc = 1;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
+            else
+                nScrollInc = -GetScrollPageSize(wxVERTICAL);
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = GetScrollPageSize(wxHORIZONTAL);
+            else
+                nScrollInc = GetScrollPageSize(wxVERTICAL);
+    } else
+    if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
+        (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = pos - m_xScrollPosition;
+            else
+                nScrollInc = pos - m_yScrollPosition;
+    }
+
+    if (orient == wxHORIZONTAL)
+    {
+        if (m_xScrollPixelsPerLine > 0)
+        {
+            int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
+            if (max < 0) max = 0;
+
+            if ( (m_xScrollPosition + nScrollInc) < 0 )
+                nScrollInc = -m_xScrollPosition; // As -ve as we can go
+            else if ( (m_xScrollPosition + nScrollInc) > max )
+                nScrollInc = max - m_xScrollPosition; // As +ve as we can go
+        }
+        else
+            m_targetWindow->Refresh();
+    }
+    else
+    {
+        if (m_yScrollPixelsPerLine > 0)
+        {
+            int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
+            if (max < 0) max = 0;
+
+            if ( (m_yScrollPosition + nScrollInc) < 0 )
+                nScrollInc = -m_yScrollPosition; // As -ve as we can go
+            else if ( (m_yScrollPosition + nScrollInc) > max )
+                nScrollInc = max - m_yScrollPosition; // As +ve as we can go
+        }
+        else
+            m_targetWindow->Refresh();
+    }
+
+    return nScrollInc;
+}
+
+void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh )
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
+
+    wxCHECK_RET( m_wxwindow != NULL, wxT("window needs client area for scrolling") );
+
+    if (orient == wxHORIZONTAL)
+    {
+        int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+
+        if (pos > max) pos = 0;
+        if (pos < 0) pos = 0;
+
+        if (pos == (int)(m_hAdjust->value+0.5)) return;
+        m_hAdjust->value = pos;
+    }
+    else
+    {
+        int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+
+        if (pos > max) pos = 0;
+        if (pos < 0) pos = 0;
+
+        if (pos == (int)(m_vAdjust->value+0.5)) return;
+        m_vAdjust->value = pos;
+    }
+
+    if (m_wxwindow->window)
+    {
+        if (orient == wxHORIZONTAL)
+        {
+            // 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 wxWidgets event
+            GtkVDisconnectEvent();
+            gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
+            GtkVConnectEvent();
+        }
+    }
+}
+
+void wxScrolledWindow::GtkVConnectEvent()
+{
+    gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
+          (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
+}
+
+void wxScrolledWindow::GtkHConnectEvent()
+{
+    gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
+          (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
+}
+
+void wxScrolledWindow::GtkHDisconnectEvent()
+{
+    gtk_signal_disconnect_by_func( GTK_OBJECT(m_hAdjust),
+        (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
+}
+
+void wxScrolledWindow::GtkVDisconnectEvent()
+{
+    gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust),
+        (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
 }
 
 // ----------------------------------------------------------------------------
@@ -460,12 +843,24 @@ void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) co
 // Default OnSize resets scrollbars, if any
 void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 {
-#if wxUSE_CONSTRAINTS
-    if (GetAutoLayout())
-        Layout();
-#endif
+    if( GetAutoLayout() || m_targetWindow->GetAutoLayout() )
+    {
+        if( m_targetWindow != this )
+            m_targetWindow->FitInside();
 
-    AdjustScrollbars();
+        FitInside();
+
+        // FIXME:  Something is really weird here...  This should be
+        // called by FitInside above (and apparently is), yet the
+        // scrollsub sample will get the scrollbar wrong if resized
+        // quickly.  This masks the bug, but is surely not the right
+        // answer at all.
+        AdjustScrollbars();
+    }
+    else
+    {
+        AdjustScrollbars();
+    }
 }
 
 // This calls OnDraw, having adjusted the origin according to the current
@@ -488,7 +883,7 @@ 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);
 
@@ -513,8 +908,11 @@ void wxScrolledWindow::OnChar(wxKeyEvent& event)
         szy = -1;
     }
 
+    int xScrollOld = GetScrollPos(wxHORIZONTAL),
+        yScrollOld = GetScrollPos(wxVERTICAL);
+
     int dsty;
-    switch ( event.KeyCode() )
+    switch ( event.GetKeyCode() )
     {
         case WXK_PAGEUP:
         case WXK_PRIOR:
@@ -554,5 +952,27 @@ void wxScrolledWindow::OnChar(wxKeyEvent& event)
         default:
             // not for us
             event.Skip();
+            return;
+    }
+
+    int xScroll = GetScrollPos(wxHORIZONTAL);
+    if ( xScroll != xScrollOld )
+    {
+        wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, xScroll,
+                               wxHORIZONTAL);
+        event.SetEventObject(this);
+        GetEventHandler()->ProcessEvent(event);
+    }
+
+    int yScroll = GetScrollPos(wxVERTICAL);
+    if ( yScroll != yScrollOld )
+    {
+        wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, yScroll,
+                               wxVERTICAL);
+        event.SetEventObject(this);
+        GetEventHandler()->ProcessEvent(event);
     }
 }
+
+
+// vi:sts=4:sw=4:et