The alignment controls are now left-aligned if the floating controls are not shown.

[wxWidgets.git] / src / gtk1 / scrolwin.cpp

diff --git a/src/gtk1/scrolwin.cpp b/src/gtk1/scrolwin.cpp
index 548a400065da6d55d3e3d5f9d193a139fc194477..4d4586697a3cfce6af84a050d752c4c843db1f3a 100644 (file)
--- a/src/gtk1/scrolwin.cpp
+++ b/src/gtk1/scrolwin.cpp
@@ -1,12 +1,12 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        generic/scrolwin.cpp
+// Name:        src/gtk1/scrolwin.cpp

 // Purpose:     wxScrolledWindow implementation
 // Purpose:     wxScrolledWindow implementation

-// Author:      Julian Smart
-// Modified by:
+// Author:      Robert Roebling
+// Modified by: Ron Lee
+//              Vadim Zeitlin: removed 90% of duplicated common code

 // Created:     01/02/97
 // Created:     01/02/97

-// RCS-ID:      $Id$
-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:     wxWindows license
+// Copyright:   (c) Robert Roebling
+// Licence:     wxWindows licence

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


@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#ifdef __GNUG__
-    #pragma implementation "scrolwin.h"
-#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"
 


@@ -28,531 +24,168 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

-#include "wx/utils.h"
-#include "wx/dcclient.h"
-
-#include "wx/gtk/scrolwin.h"
-#include "wx/panel.h"
-
-#include <gtk/gtk.h>
-#include "wx/gtk/win_gtk.h"
-
-// ----------------------------------------------------------------------------
-// event tables
-// ----------------------------------------------------------------------------
-
-BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
-    EVT_SIZE(wxScrolledWindow::OnSize)
-    EVT_PAINT(wxScrolledWindow::OnPaint)
-    EVT_CHAR(wxScrolledWindow::OnChar)
-END_EVENT_TABLE()
-
-IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)
+#include "wx/scrolwin.h"
+#include "wx/gtk1/private.h"

 
 // ============================================================================
 // implementation
 // ============================================================================
 
 
 // ============================================================================
 // implementation
 // ============================================================================
 

-//-----------------------------------------------------------------------------
-// data
-//-----------------------------------------------------------------------------
-
-extern bool       g_blockEventsOnDrag;
-
-//-----------------------------------------------------------------------------
-// idle system
-//-----------------------------------------------------------------------------
-
-extern void wxapp_install_idle_handler();
-extern bool g_isIdle;
-
-//-----------------------------------------------------------------------------
-// "value_changed" from m_vAdjust
-//-----------------------------------------------------------------------------
-
-static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust, wxScrolledWindow *win )
-{
-    if (g_isIdle)
-        wxapp_install_idle_handler();
-
-    if (g_blockEventsOnDrag) return;
-
-    if (!win->m_hasVMT) return;
-
-    win->GtkVScroll( adjust->value );
-}
-
-//-----------------------------------------------------------------------------
-// "value_changed" from m_hAdjust
-//-----------------------------------------------------------------------------
-
-static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust, wxScrolledWindow *win )
-{
-    if (g_isIdle)
-        wxapp_install_idle_handler();
-
-    if (g_blockEventsOnDrag) return;
-    if (!win->m_hasVMT) return;
-
-    win->GtkHScroll( adjust->value );
-}
-
-//-----------------------------------------------------------------------------
-// InsertChild for wxScrolledWindow
-//-----------------------------------------------------------------------------
-
-static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
-{
-    /* 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;
-
-    gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
-                     GTK_WIDGET(child->m_widget),
-                     child->m_x,
-                     child->m_y,
-                     child->m_width,
-                     child->m_height );
-}
-

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// wxScrolledWindow creation
+// wxScrollHelper implementation

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-wxScrolledWindow::wxScrolledWindow()
+void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
+                                         int noUnitsX, int noUnitsY,
+                                         int xPos, int yPos,
+                                         bool noRefresh)

 {
 {

-    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 = (wxWindow*) NULL;
-}
-
-bool wxScrolledWindow::Create(wxWindow *parent,
-                              wxWindowID id,
-                              const wxPoint& pos,
-                              const wxSize& size,
-                              long style,
-                              const wxString& name)
-{
-    if (!PreCreation( parent, pos, size ) ||
-        !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
-    {
-        wxFAIL_MSG( wxT("wxWindow creation failed") );
-        return FALSE;
-    }
-
-    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;
+    int xs, ys;
+    GetViewStart(& xs, & ys);

 
 

-    m_targetWindow = this;
+    int old_x = m_xScrollPixelsPerLine * xs;
+    int old_y = m_yScrollPixelsPerLine * ys;

 
 

-    m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
-    GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
-
-    GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
+    m_xScrollPixelsPerLine = pixelsPerUnitX;
+    m_yScrollPixelsPerLine = pixelsPerUnitY;

 
 

-    GtkScrolledWindowClass *scroll_class = GTK_SCROLLED_WINDOW_CLASS( GTK_OBJECT_GET_CLASS(m_widget) );
-    scroll_class->scrollbar_spacing = 0;
+    m_win->m_hAdjust->value = m_xScrollPosition = xPos;
+    m_win->m_vAdjust->value = m_yScrollPosition = yPos;

 
 

-    gtk_scrolled_window_set_policy( scrolledWindow, GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
+    // 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_hAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->hscrollbar) );
-    m_vAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->vscrollbar) );
+    int w = noUnitsX * pixelsPerUnitX;
+    int h = noUnitsY * pixelsPerUnitY;
+    m_targetWindow->SetVirtualSize( w ? w : wxDefaultCoord,
+                                    h ? h : wxDefaultCoord);

 
 

-    m_wxwindow = gtk_pizza_new();
+    if (!noRefresh)
+    {
+        int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
+        int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;

 
 

-    gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
+        m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
+    }

 
 

-    GtkPizza *pizza = GTK_PIZZA(m_wxwindow);
+    m_targetWindow->m_hasScrolling = pixelsPerUnitX || pixelsPerUnitY;
+}

 
 

-    if (HasFlag(wxRAISED_BORDER))
-    {
-        gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_OUT );
-    }
-    else if (HasFlag(wxSUNKEN_BORDER))
-    {
-        gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_IN );
-    }
-    else if (HasFlag(wxSIMPLE_BORDER))
+void wxScrollHelper::DoAdjustScrollbar(GtkAdjustment *adj,
+                                             int pixelsPerLine,
+                                             int winSize,
+                                             int virtSize,
+                                             int *pos,
+                                             int *lines,
+                                             int *linesPerPage)
+{
+    if ( pixelsPerLine == 0 )

     {
     {

-        gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_THIN );
+        adj->upper = 1.0;
+        adj->page_increment = 1.0;
+        adj->page_size = 1.0;

     }
     }

-    else
+    else // we do have scrollbar

     {
     {

-        gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_NONE );
+        adj->upper = (virtSize + pixelsPerLine - 1) / pixelsPerLine;
+        adj->page_size = winSize / pixelsPerLine;
+        adj->page_increment = winSize / pixelsPerLine;
+
+        // Special case. When client and virtual size are very close but
+        // the client is big enough, kill scrollbar.
+
+        if ((adj->page_size < adj->upper) && (winSize >= virtSize))
+            adj->page_size += 1.0;
+
+        // If the scrollbar hits the right side, move the window
+        // right to keep it from over extending.
+
+        if ( !wxIsNullDouble(adj->value) &&
+                (adj->value + adj->page_size > adj->upper) )
+        {
+            adj->value = adj->upper - adj->page_size;
+            if (adj->value < 0.0)
+                adj->value = 0.0;
+
+            if ( m_win->GetChildren().empty() )
+            {
+                // This is enough without child windows
+                *pos = (int)adj->value;
+            }
+            else
+            {
+                // We need to actually scroll window
+                gtk_signal_emit_by_name( GTK_OBJECT(adj), "value_changed" );
+            }
+        }

     }
 
     }
 

-    GTK_WIDGET_SET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
-    m_acceptsFocus = TRUE;
-
-    // I _really_ don't want scrollbars in the beginning
-    m_vAdjust->lower = 0.0;
-    m_vAdjust->upper = 1.0;
-    m_vAdjust->value = 0.0;
-    m_vAdjust->step_increment = 1.0;
-    m_vAdjust->page_increment = 1.0;
-    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;
-    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 );
-
-    gtk_widget_show( m_wxwindow );
-
-    if (m_parent)
-        m_parent->DoAddChild( this );
-
-    PostCreation();
-
-    Show( TRUE );
-
-    return TRUE;
-}
-
-wxScrolledWindow::~wxScrolledWindow()
-{
+    *lines = (int)(adj->upper + 0.5);
+    *linesPerPage = (int)(adj->page_increment + 0.5);
+    gtk_signal_emit_by_name( GTK_OBJECT(adj), "changed" );

 }
 
 }
 

-// ----------------------------------------------------------------------------
-// setting scrolling parameters
-// ----------------------------------------------------------------------------
-
-/*
- * 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 )
-{
-    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();
-}
-
-void wxScrolledWindow::AdjustScrollbars()
+void wxScrollHelper::AdjustScrollbars()

 {
     int w, h;
 {
     int w, h;

-    m_targetWindow->GetClientSize( &w, &h );
-    
-    if (m_xScrollPixelsPerLine == 0)
-        m_hAdjust->page_size = 1.0;
-    else
-        m_hAdjust->page_size = (w / m_xScrollPixelsPerLine);
-        
-    if (m_yScrollPixelsPerLine == 0)
-        m_vAdjust->page_size = 1.0;
-    else
-        m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
-    
-    gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
-    gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
-}
+    int vw, vh;

 
 

-// ----------------------------------------------------------------------------
-// target window handling
-// ----------------------------------------------------------------------------
-
-void wxScrolledWindow::SetTargetWindow( wxWindow *target )
-{
-    wxASSERT_MSG( target, wxT("target window must not be NULL") );
-    m_targetWindow = target;
-}
-
-wxWindow *wxScrolledWindow::GetTargetWindow()
-{
-    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)
-{
-    dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
-                        -m_yScrollPosition * m_yScrollPixelsPerLine );
-}
-
-void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
-{
-    if ( x_unit )
-        *x_unit = m_xScrollPixelsPerLine;
-    if ( y_unit )
-        *y_unit = m_yScrollPixelsPerLine;
-}
-
-int wxScrolledWindow::GetScrollPageSize(int orient) const
-{
-    if ( orient == wxHORIZONTAL )
-        return m_xScrollLinesPerPage;
-    else
-        return m_yScrollLinesPerPage;
-}
+    m_targetWindow->GetClientSize( &w, &h );
+    m_targetWindow->GetVirtualSize( &vw, &vh );

 
 

-void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
-{
-    if ( orient == wxHORIZONTAL )
-        m_xScrollLinesPerPage = pageSize;
-    else
-        m_yScrollLinesPerPage = pageSize;
+    DoAdjustScrollbar(m_win->m_hAdjust, m_xScrollPixelsPerLine, w, vw,
+                      &m_xScrollPosition, &m_xScrollLines, &m_xScrollLinesPerPage);
+    DoAdjustScrollbar(m_win->m_vAdjust, m_yScrollPixelsPerLine, h, vh,
+                      &m_yScrollPosition, &m_yScrollLines, &m_yScrollLinesPerPage);

 }
 
 }
 

-/*
- * Scroll to given position (scroll position, not pixel position)
- */
-void wxScrolledWindow::Scroll( int x_pos, int y_pos )
+void wxScrollHelper::DoScrollOneDir(int orient,
+                                    GtkAdjustment *adj,
+                                    int pos,
+                                    int pixelsPerLine,
+                                    int *posOld)

 {
 {

-    if (!m_targetWindow)
-        return;
-
-    if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
-        ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
-
-    if ((x_pos != -1) && (m_xScrollPixelsPerLine))
-    {
-        int old_x = m_xScrollPosition;
-        m_xScrollPosition = x_pos;
-        m_hAdjust->value = x_pos;
-        
-        m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
-        
-        gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
-    }
-    
-    if ((y_pos != -1) && (m_yScrollPixelsPerLine))
+    if ( pos != -1 && pos != *posOld && pixelsPerLine )

     {
     {

-        int old_y = m_yScrollPosition;
-        m_yScrollPosition = y_pos;
-        m_vAdjust->value = y_pos;
-        
-        m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
-        
-        gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
-    }
-}
+        int max = (int)(adj->upper - adj->page_size + 0.5);
+        if (max < 0)
+            max = 0;
+        if (pos > max)
+            pos = max;
+        if (pos < 0)
+            pos = 0;

 
 

-void wxScrolledWindow::GtkVScroll( float value )
-{
-    if (!m_targetWindow)
-        return;
-
-    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 );
-}
+        adj->value = pos;

 
 

-void wxScrolledWindow::GtkHScroll( float value )
-{
-    if (!m_targetWindow)
-        return;
-
-    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 );
-}
+        int diff = (*posOld - pos)*pixelsPerLine;
+        m_targetWindow->ScrollWindow(orient == wxHORIZONTAL ? diff : 0,
+                                     orient == wxHORIZONTAL ? 0 : diff);

 
 

-void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
-{
-    m_xScrollingEnabled = x_scroll;
-    m_yScrollingEnabled = y_scroll;
-}
+        *posOld = pos;

 
 

-void wxScrolledWindow::GetVirtualSize (int *x, int *y) const
-{
-    if ( x )
-        *x = m_xScrollPixelsPerLine * m_xScrollLines;
-    if ( y )
-        *y = m_yScrollPixelsPerLine * m_yScrollLines;
+        m_win->GtkUpdateScrollbar(orient);
+    }

 }
 
 }
 

-// Where the current view starts from
-void wxScrolledWindow::GetViewStart (int *x, int *y) const
+void wxScrollHelper::DoScroll( int x_pos, int y_pos )

 {
 {

-    if ( x )
-        *x = m_xScrollPosition;
-    if ( y )
-        *y = m_yScrollPosition;
-}
+    wxCHECK_RET( m_targetWindow != 0, wxT("No target window") );

 
 

-void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
-{
-    if ( xx )
-        *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
-    if ( yy )
-        *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
+    DoScrollOneDir(wxHORIZONTAL, m_win->m_hAdjust, x_pos, m_xScrollPixelsPerLine,
+                &m_xScrollPosition);
+    DoScrollOneDir(wxVERTICAL, m_win->m_vAdjust, y_pos, m_yScrollPixelsPerLine,
+                &m_yScrollPosition);

 }
 
 }
 

-void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
+bool wxScrollHelper::IsScrollbarShown(int WXUNUSED(orient)) const

 {
 {

-    if ( xx )
-        *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
-    if ( yy )
-        *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
+    return true;

 }
 
 }
 

-// ----------------------------------------------------------------------------
-// event handlers
-// ----------------------------------------------------------------------------
-
-// Default OnSize resets scrollbars, if any
-void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
+void wxScrollHelper::DoShowScrollbars(wxScrollbarVisibility WXUNUSED(horz),
+                                      wxScrollbarVisibility WXUNUSED(vert))

 {
 {

-#if wxUSE_CONSTRAINTS
-    if (GetAutoLayout())
-        Layout();
-#endif
-
-    AdjustScrollbars();
+    // TODO: not supported/implemented

 }
 
 }
 

-// This calls OnDraw, having adjusted the origin according to the current
-// scroll position
-void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
-{
-    wxPaintDC dc(this);
-    PrepareDC(dc);
-
-    OnDraw(dc);
-}
-
-// kbd handling: notice that we use OnChar() and not OnKeyDown() for
-// compatibility here - if we used OnKeyDown(), the programs which process
-// arrows themselves in their OnChar() would never get the message and like
-// this they always have the priority
-void wxScrolledWindow::OnChar(wxKeyEvent& event)
-{
-    int stx, sty,       // view origin
-        szx, szy,       // view size (total)
-        clix, cliy;     // view size (on screen)
-
-    ViewStart(&stx, &sty);
-    GetClientSize(&clix, &cliy);
-    GetVirtualSize(&szx, &szy);
-
-    if( m_xScrollPixelsPerLine )
-    {
-        clix /= m_xScrollPixelsPerLine;
-        szx /= m_xScrollPixelsPerLine;
-    }
-    else
-    {
-        clix = 0;
-        szx = -1;
-    }
-    if( m_yScrollPixelsPerLine )
-    {
-        cliy /= m_yScrollPixelsPerLine;
-        szy /= m_yScrollPixelsPerLine;
-    }
-    else
-    {
-        cliy = 0;
-        szy = -1;
-    }
-
-    int dsty;
-    switch ( event.KeyCode() )
-    {
-        case WXK_PAGEUP:
-        case WXK_PRIOR:
-            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;
-
-        case WXK_HOME:
-            Scroll(0, event.ControlDown() ? 0 : -1);
-            break;
-
-        case WXK_END:
-            Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1);
-            break;
-
-        case WXK_UP:
-            Scroll(-1, sty - 1);
-            break;
-
-        case WXK_DOWN:
-            Scroll(-1, sty + 1);
-            break;
-
-        case WXK_LEFT:
-            Scroll(stx - 1, -1);
-            break;
-
-        case WXK_RIGHT:
-            Scroll(stx + 1, -1);
-            break;
-
-        default:
-            // not for us
-            event.Skip();
-    }
-}