ignore clicks on a toolbar but outside any button

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

diff --git a/src/generic/splitter.cpp b/src/generic/splitter.cpp
index 0d926085d458a2f5f4d73d880c8641a14b45c4f6..3da3fa0472a55dde7388b311a2b6d3497ac4e3df 100644 (file)
--- a/src/generic/splitter.cpp
+++ b/src/generic/splitter.cpp
@@ -21,59 +21,85 @@
 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

-    #include "wx/wx.h"
+    #include "wx/window.h"
+    #include "wx/dialog.h"
+    #include "wx/frame.h"

 #endif
 
 #endif
 

-#include <math.h>

 #include <stdlib.h>
 
 #include "wx/string.h"
 #include "wx/splitter.h"
 #include "wx/dcscreen.h"
 #include <stdlib.h>
 
 #include "wx/string.h"
 #include "wx/splitter.h"
 #include "wx/dcscreen.h"

+#include "wx/settings.h"
+#include "wx/log.h"
+#include "wx/utils.h"
+
+DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED)
+DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING)
+DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED)
+DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_UNSPLIT)

 
 

-#if !USE_SHARED_LIBRARY

 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)

+IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxNotifyEvent)

 
 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
     EVT_PAINT(wxSplitterWindow::OnPaint)
     EVT_SIZE(wxSplitterWindow::OnSize)
 
 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
     EVT_PAINT(wxSplitterWindow::OnPaint)
     EVT_SIZE(wxSplitterWindow::OnSize)

+    EVT_IDLE(wxSplitterWindow::OnIdle)

     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)

+
+#ifdef __WXMSW__
+    EVT_SET_CURSOR(wxSplitterWindow::OnSetCursor)
+#endif // wxMSW
+
+    WX_EVENT_TABLE_CONTROL_CONTAINER(wxSplitterWindow)

 END_EVENT_TABLE()
 END_EVENT_TABLE()

-#endif

 
 

-wxSplitterWindow::wxSplitterWindow()
-{
-    m_splitMode = wxSPLIT_VERTICAL;
-    m_windowOne = (wxWindow *) NULL;
-    m_windowTwo = (wxWindow *) NULL;
-    m_dragMode = wxSPLIT_DRAG_NONE;
-    m_oldX = 0;
-    m_oldY = 0;
-    m_firstX = 0;
-    m_firstY = 0;
-    m_sashSize = 7;
-    m_borderSize = 2;
-    m_sashPosition = 0;
-    m_sashCursorWE = (wxCursor *) NULL;
-    m_sashCursorNS = (wxCursor *) NULL;
-    m_sashTrackerPen = (wxPen *) NULL;
-    m_lightShadowPen = (wxPen *) NULL;
-    m_mediumShadowPen = (wxPen *) NULL;
-    m_darkShadowPen = (wxPen *) NULL;
-    m_faceBrush = (wxBrush *) NULL;
-    m_facePen = (wxPen *) NULL;
-    m_hilightPen = (wxPen *) NULL;
-    m_minimumPaneSize = 0;
-}
+WX_DELEGATE_TO_CONTROL_CONTAINER(wxSplitterWindow);

 
 

-wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
+bool wxSplitterWindow::Create(wxWindow *parent, wxWindowID id,

                                    const wxPoint& pos,
                                    const wxSize& size,
                                    long style,
                                    const wxString& name)
                                    const wxPoint& pos,
                                    const wxSize& size,
                                    long style,
                                    const wxString& name)

-                : wxWindow(parent, id, pos, size, style, name)

 {
 {

+    // allow TABbing from one window to the other
+    style |= wxTAB_TRAVERSAL;
+
+    if (!wxWindow::Create(parent, id, pos, size, style, name))
+        return FALSE;
+
+    m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
+
+    if ( style & wxSP_3DSASH )
+        m_sashSize = 7;
+    else
+        m_sashSize = 3;
+
+    if ( style & wxSP_3DBORDER )
+        m_borderSize = 2;
+    else if ( style & wxSP_BORDER )
+        m_borderSize = 1;
+    else
+        m_borderSize = 0;
+
+#ifdef __WXMAC__
+    int major,minor;
+    wxGetOsVersion( &major, &minor );
+    if (major >= 10)
+        m_windowStyle |= wxSP_SASH_AQUA;
+#endif
+
+    return TRUE;
+}
+
+void wxSplitterWindow::Init()
+{
+    m_container.SetContainerWindow(this);
+

     m_splitMode = wxSPLIT_VERTICAL;
     m_splitMode = wxSPLIT_VERTICAL;

+    m_permitUnsplitAlways = TRUE;

     m_windowOne = (wxWindow *) NULL;
     m_windowTwo = (wxWindow *) NULL;
     m_dragMode = wxSPLIT_DRAG_NONE;
     m_windowOne = (wxWindow *) NULL;
     m_windowTwo = (wxWindow *) NULL;
     m_dragMode = wxSPLIT_DRAG_NONE;


@@ -83,10 +109,10 @@ wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
     m_firstY = 0;
     m_sashSize = 7;
     m_borderSize = 2;
     m_firstY = 0;
     m_sashSize = 7;
     m_borderSize = 2;

-    m_sashPosition = 0;
+    m_sashPosition = m_requestedSashPosition = 0;

     m_minimumPaneSize = 0;
     m_minimumPaneSize = 0;

-    m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
-    m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
+    m_sashCursorWE = wxCursor(wxCURSOR_SIZEWE);
+    m_sashCursorNS = wxCursor(wxCURSOR_SIZENS);

     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
     m_lightShadowPen = (wxPen *) NULL;
     m_mediumShadowPen = (wxPen *) NULL;
     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
     m_lightShadowPen = (wxPen *) NULL;
     m_mediumShadowPen = (wxPen *) NULL;


@@ -95,33 +121,16 @@ wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
     m_facePen = (wxPen *) NULL;
     m_hilightPen = (wxPen *) NULL;
 
     m_facePen = (wxPen *) NULL;
     m_hilightPen = (wxPen *) NULL;
 

-    if ( style & wxSP_3D )
-    {
-        m_borderSize = 2;
-        m_sashSize = 7;
-    }
-    else if ( style & wxSP_BORDER )
-    {
-        m_borderSize = 1;
-        m_sashSize = 3;
-    }
-    else
-    {
-        m_borderSize = 0;
-        m_sashSize = 3;
-    }
+    m_borderSize = 0;
+    m_sashSize = 3;

 
 

-    // Eventually, we'll respond to colour change messages

     InitColours();
 
     InitColours();
 

-    // For debugging purposes, to see the background.
-//    SetBackground(wxBLUE_BRUSH);
+    m_needUpdating = FALSE;

 }
 
 wxSplitterWindow::~wxSplitterWindow()
 {
 }
 
 wxSplitterWindow::~wxSplitterWindow()
 {

-    delete m_sashCursorWE;
-    delete m_sashCursorNS;

     delete m_sashTrackerPen;
     delete m_lightShadowPen;
     delete m_darkShadowPen;
     delete m_sashTrackerPen;
     delete m_lightShadowPen;
     delete m_darkShadowPen;


@@ -131,6 +140,12 @@ wxSplitterWindow::~wxSplitterWindow()
     delete m_faceBrush;
 }
 
     delete m_faceBrush;
 }
 

+void wxSplitterWindow::SetResizeCursor()
+{
+    SetCursor(m_splitMode == wxSPLIT_VERTICAL ? m_sashCursorWE
+                                              : m_sashCursorNS);
+}
+

 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 {
     wxPaintDC dc(this);
 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 {
     wxPaintDC dc(this);


@@ -140,29 +155,34 @@ void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
     DrawSash(dc);
 }
 
     DrawSash(dc);
 }
 

+void wxSplitterWindow::OnIdle(wxIdleEvent& event)
+{
+    if (m_needUpdating)
+        SizeWindows();
+
+    event.Skip();
+}

 
 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 {
 
 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 {

-    long x = event.GetX();
-    long y = event.GetY();
+    int x = (int)event.GetX(),
+        y = (int)event.GetY();

 
     // reset the cursor
 #ifdef __WXMOTIF__
     SetCursor(* wxSTANDARD_CURSOR);
 
     // reset the cursor
 #ifdef __WXMOTIF__
     SetCursor(* wxSTANDARD_CURSOR);

-#endif
-#ifdef __WXMSW__
+#elif defined(__WXMSW__)

     SetCursor(wxCursor());
 #endif
 
     SetCursor(wxCursor());
 #endif
 

-    // under wxGTK the method above causes the mouse
-    // to flicker so we set the standard cursor only
-    // when leaving the window and when moving over
-    // non-sash parts of the window. this should work
-    // on the other platforms as well, but who knows.
-#ifdef __WXGTK__
-    if (event.Leaving())
-        SetCursor(* wxSTANDARD_CURSOR);
-#endif
+    if (GetWindowStyle() & wxSP_NOSASH)
+        return;
+
+    // with wxSP_LIVE_UPDATE style the splitter windows are always resized
+    // following the mouse movement while it drags the sash, without it we only
+    // draw the sash at the new position but only resize the windows when the
+    // dragging is finished
+    bool isLive = (GetWindowStyleFlag() & wxSP_LIVE_UPDATE) != 0;

 
     if (event.LeftDown())
     {
 
     if (event.LeftDown())
     {


@@ -172,9 +192,19 @@ void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 
             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 
 
             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 

-            DrawSashTracker(x, y);
+            if ( !isLive )
+            {
+                // remember the initial sash position and draw the initial
+                // shadow sash
+                m_sashPositionCurrent = m_sashPosition;
+
+                DrawSashTracker(x, y);
+            }
+

             m_oldX = x;
             m_oldY = y;
             m_oldX = x;
             m_oldY = y;

+
+            SetResizeCursor();

             return;
         }
     }
             return;
         }
     }


@@ -185,40 +215,54 @@ void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
         ReleaseMouse();
 
         // Erase old tracker
         ReleaseMouse();
 
         // Erase old tracker

-        DrawSashTracker(m_oldX, m_oldY);
-
-        // Obtain window size. We are only interested in the dimension the sash
-        // splits up
-        int w, h;
-        GetClientSize(&w, &h);
-        int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
-        int new_sash_position =
-            (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
+        if ( !isLive )
+        {
+            DrawSashTracker(m_oldX, m_oldY);
+        }

 
 

-        if ( !OnSashPositionChange(new_sash_position) )
-            return;
+        // the position of the click doesn't exactly correspond to
+        // m_sashPosition, rather it changes it by the distance by which the
+        // mouse has moved
+        int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;

 
 

-        if ( new_sash_position == 0 )
+        int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
+        int posSashNew = OnSashPositionChanging(posSashOld + diff);
+        if ( posSashNew == -1 )

         {
         {

-            // We remove the first window from the view
-            wxWindow *removedWindow = m_windowOne;
-            m_windowOne = m_windowTwo;
-            m_windowTwo = (wxWindow *) NULL;
-            OnUnsplit(removedWindow);
-            m_sashPosition = 0;
+            // change not allowed
+            return;

         }
         }

-        else if ( new_sash_position == window_size )
+
+        if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )

         {
         {

-            // We remove the second window from the view
-            wxWindow *removedWindow = m_windowTwo;
-            m_windowTwo = (wxWindow *) NULL;
-            OnUnsplit(removedWindow);
-            m_sashPosition = 0;
+            // Deal with possible unsplit scenarios
+            if ( posSashNew == 0 )
+            {
+                // We remove the first window from the view
+                wxWindow *removedWindow = m_windowOne;
+                m_windowOne = m_windowTwo;
+                m_windowTwo = (wxWindow *) NULL;
+                OnUnsplit(removedWindow);
+                DoSetSashPosition(0);
+            }
+            else if ( posSashNew == GetWindowSize() )
+            {
+                // We remove the second window from the view
+                wxWindow *removedWindow = m_windowTwo;
+                m_windowTwo = (wxWindow *) NULL;
+                OnUnsplit(removedWindow);
+                DoSetSashPosition(0);
+            }
+            else
+            {
+                DoSetSashPosition(posSashNew);
+            }

         }
         else
         {
         }
         else
         {

-            m_sashPosition = new_sash_position;
+            DoSetSashPosition(posSashNew);

         }
         }

+

         SizeWindows();
     }  // left up && dragging
     else if (event.Moving() && !event.Dragging())
         SizeWindows();
     }  // left up && dragging
     else if (event.Moving() && !event.Dragging())


@@ -226,33 +270,82 @@ void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
         // Just change the cursor if required
         if ( SashHitTest(x, y) )
         {
         // Just change the cursor if required
         if ( SashHitTest(x, y) )
         {

-                if ( m_splitMode == wxSPLIT_VERTICAL )
-                {
-                    SetCursor(*m_sashCursorWE);
-                }
-                else
-                {
-                    SetCursor(*m_sashCursorNS);
-                }
+            SetResizeCursor();

         }
         }

-#ifdef __WXGTK__
+#if defined(__WXGTK__) || defined(__WXMSW__)

         else
         else

-       {
-           // where else do we unset the cursor?
+        {
+            // We must set the normal cursor in MSW, because
+            // if the child window doesn't have a cursor, the
+            // parent's (splitter window) will be used, and this
+            // must be the standard cursor.
+
+            // where else do we unset the cursor?

             SetCursor(* wxSTANDARD_CURSOR);
             SetCursor(* wxSTANDARD_CURSOR);

-       }
-#endif
+        }
+#endif // __WXGTK__

     }
     }

-    else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING)) 
+    else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))

     {
     {

+#ifdef __WXMSW__
+        // Otherwise, the cursor sometimes reverts to the normal cursor
+        // during dragging.
+        SetResizeCursor();
+#endif // __WXMSW__
+
+        int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
+
+        int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
+        int posSashNew = OnSashPositionChanging(posSashOld + diff);
+        if ( posSashNew == -1 )
+        {
+            // change not allowed
+            return;
+        }
+
+        if ( posSashNew == m_sashPosition )
+            return;
+

         // Erase old tracker
         // Erase old tracker

-        DrawSashTracker(m_oldX, m_oldY);
+        if ( !isLive )
+        {
+            DrawSashTracker(m_oldX, m_oldY);
+        }

 
 

-        // Draw new one
-        DrawSashTracker(x, y);
+        if (m_splitMode == wxSPLIT_VERTICAL)
+            x = posSashNew;
+        else
+            y = posSashNew;

 
 

+        // Remember old positions

         m_oldX = x;
         m_oldY = y;
         m_oldX = x;
         m_oldY = y;

+
+#ifdef __WXMSW__
+        // As we captured the mouse, we may get the mouse events from outside
+        // our window - for example, negative values in x, y. This has a weird
+        // consequence under MSW where we use unsigned values sometimes and
+        // signed ones other times: the coordinates turn as big positive
+        // numbers and so the sash is drawn on the *right* side of the window
+        // instead of the left (or bottom instead of top). Correct this.
+        if ( (short)m_oldX < 0 )
+            m_oldX = 0;
+        if ( (short)m_oldY < 0 )
+            m_oldY = 0;
+#endif // __WXMSW__
+
+        // Draw new one
+        if ( !isLive )
+        {
+            m_sashPositionCurrent = posSashNew;
+
+            DrawSashTracker(m_oldX, m_oldY);
+        }
+        else
+        {
+            DoSetSashPosition(posSashNew);
+            m_needUpdating = TRUE;
+        }

     }
     else if ( event.LeftDClick() )
     {
     }
     else if ( event.LeftDClick() )
     {


@@ -260,8 +353,45 @@ void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
     }
 }
 
     }
 }
 

-void wxSplitterWindow::OnSize(wxSizeEvent& WXUNUSED(event))
+void wxSplitterWindow::OnSize(wxSizeEvent& event)

 {
 {

+    // only process this message if we're not iconized - otherwise iconizing
+    // and restoring a window containing the splitter has a funny side effect
+    // of changing the splitter position!
+    wxWindow *parent = GetParent();
+    while ( parent && !parent->IsTopLevel() )
+    {
+        parent = parent->GetParent();
+    }
+
+    bool iconized = FALSE;
+
+    // wxMotif doesn't yet have a wxTopLevelWindow implementation
+#ifdef __WXMOTIF__
+    wxFrame *winTop = wxDynamicCast(parent, wxFrame);
+#else
+    wxTopLevelWindow *winTop = wxDynamicCast(parent, wxTopLevelWindow);
+#endif
+    if ( winTop )
+    {
+        iconized = winTop->IsIconized();
+    }
+#ifndef __WXMOTIF__
+    else
+    {
+        wxFAIL_MSG(wxT("should have a top level parent!"));
+
+        iconized = FALSE;
+    }
+#endif
+    
+    if ( iconized )
+    {
+        event.Skip();
+
+        return;
+    }
+

     int cw, ch;
     GetClientSize( &cw, &ch );
     if ( m_windowTwo )
     int cw, ch;
     GetClientSize( &cw, &ch );
     if ( m_windowTwo )


@@ -269,14 +399,15 @@ void wxSplitterWindow::OnSize(wxSizeEvent& WXUNUSED(event))
         if ( m_splitMode == wxSPLIT_VERTICAL )
         {
             if ( m_sashPosition >= (cw - 5) )
         if ( m_splitMode == wxSPLIT_VERTICAL )
         {
             if ( m_sashPosition >= (cw - 5) )

-                m_sashPosition = wxMax(10, cw - 40);
+                DoSetSashPosition(wxMax(10, cw - 40));

         }
         }

-        if ( m_splitMode == wxSPLIT_HORIZONTAL )
+        else // m_splitMode == wxSPLIT_HORIZONTAL

         {
             if ( m_sashPosition >= (ch - 5) )
         {
             if ( m_sashPosition >= (ch - 5) )

-                m_sashPosition = wxMax(10, ch - 40);
+                DoSetSashPosition(wxMax(10, ch - 40));

         }
     }
         }
     }

+

     SizeWindows();
 }
 
     SizeWindows();
 }
 


@@ -299,8 +430,6 @@ bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
         else
             return FALSE;
     }
         else
             return FALSE;
     }

-
-    return FALSE;

 }
 
 // Draw 3D effect borders
 }
 
 // Draw 3D effect borders


@@ -309,24 +438,32 @@ void wxSplitterWindow::DrawBorders(wxDC& dc)
     int w, h;
     GetClientSize(&w, &h);
 
     int w, h;
     GetClientSize(&w, &h);
 

-    if ( GetWindowStyleFlag() & wxSP_3D )
+    if ( GetWindowStyleFlag() & wxSP_3DBORDER )

     {
     {

+
+        dc.SetPen(*m_facePen);
+        dc.SetBrush(*m_faceBrush);
+        dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
+        dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
+        dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
+        dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
+

         dc.SetPen(*m_mediumShadowPen);
         dc.SetPen(*m_mediumShadowPen);

-        dc.DrawLine(0, 0, w-1, 0);
-        dc.DrawLine(0, 0, 0, h - 1);
+        dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
+        dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);

 
         dc.SetPen(*m_darkShadowPen);
 
         dc.SetPen(*m_darkShadowPen);

-        dc.DrawLine(1, 1, w-2, 1);
-        dc.DrawLine(1, 1, 1, h-2);
+        dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
+        dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);

 
         dc.SetPen(*m_hilightPen);
 
         dc.SetPen(*m_hilightPen);

-        dc.DrawLine(0, h-1, w-1, h-1);
-        dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
+        dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
+        dc.DrawLine(w-m_borderSize+1, m_borderSize - 2, w-m_borderSize+1, h-m_borderSize+2); // Surely the maximum y pos. should be h - 1.

                                      /// Anyway, h is required for MSW.
 
         dc.SetPen(*m_lightShadowPen);
                                      /// Anyway, h is required for MSW.
 
         dc.SetPen(*m_lightShadowPen);

-        dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
-        dc.DrawLine(1, h-2, w-1, h-2);     // Bottom
+        dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
+        dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom

     }
     else if ( GetWindowStyleFlag() & wxSP_BORDER )
     {
     }
     else if ( GetWindowStyleFlag() & wxSP_BORDER )
     {


@@ -344,51 +481,95 @@ void wxSplitterWindow::DrawSash(wxDC& dc)
 {
     if ( m_sashPosition == 0 || !m_windowTwo)
         return;
 {
     if ( m_sashPosition == 0 || !m_windowTwo)
         return;

+    if (GetWindowStyle() & wxSP_NOSASH)
+        return;

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

-    if ( GetWindowStyleFlag() & wxSP_3D )
+    if ( GetWindowStyleFlag() & wxSP_3DSASH )

     {
         if ( m_splitMode == wxSPLIT_VERTICAL )
         {
             dc.SetPen(*m_facePen);
     {
         if ( m_splitMode == wxSPLIT_VERTICAL )
         {
             dc.SetPen(*m_facePen);

-            dc.SetBrush(*m_faceBrush);
-            dc.DrawRectangle(m_sashPosition + 2, 0, m_sashSize - 4, h);
+
+            if (HasFlag( wxSP_SASH_AQUA ))
+                dc.SetBrush(*wxWHITE_BRUSH);
+            else
+                dc.SetBrush(*m_faceBrush);
+            dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );

 
             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 
             dc.SetPen(*m_lightShadowPen);
 
             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 
             dc.SetPen(*m_lightShadowPen);

-            dc.DrawLine(m_sashPosition, 1, m_sashPosition, h-2);
+            int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
+            dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);

 
             dc.SetPen(*m_hilightPen);
 
             dc.SetPen(*m_hilightPen);

-            dc.DrawLine(m_sashPosition+1, 0, m_sashPosition+1, h);
-
-            dc.SetPen(*m_mediumShadowPen);
-            dc.DrawLine(m_sashPosition+m_sashSize-2, 1, m_sashPosition+m_sashSize-2, h-1);
-
-            dc.SetPen(*m_darkShadowPen);
-            dc.DrawLine(m_sashPosition+m_sashSize-1, 2, m_sashPosition+m_sashSize-1, h-2);
+            dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
+
+            if (!HasFlag( wxSP_SASH_AQUA ))
+                dc.SetPen(*m_mediumShadowPen);
+
+            int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
+            dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
+
+            if (HasFlag( wxSP_SASH_AQUA ))
+                dc.SetPen(*m_lightShadowPen);
+            else
+                dc.SetPen(*m_darkShadowPen);
+            dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
+
+            // Draw the top and bottom edges of the sash, if requested
+            if (GetWindowStyle() & wxSP_FULLSASH)
+            {
+                // Top
+                dc.SetPen(*m_hilightPen);
+                dc.DrawLine(m_sashPosition+1, m_borderSize, m_sashPosition+m_sashSize-1, m_borderSize);
+
+                // Bottom
+                dc.SetPen(*m_darkShadowPen);
+                dc.DrawLine(m_sashPosition+1, h-m_borderSize-1, m_sashPosition+m_sashSize-1, h-m_borderSize-1);
+            }

         }
         else
         {
             dc.SetPen(*m_facePen);
         }
         else
         {
             dc.SetPen(*m_facePen);

-            dc.SetBrush(*m_faceBrush);
-            dc.DrawRectangle(0, m_sashPosition + 2, w, m_sashSize - 4);
+            if (HasFlag( wxSP_SASH_AQUA ))
+                dc.SetBrush(*wxWHITE_BRUSH);
+            else
+                dc.SetBrush(*m_faceBrush);
+            dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);

 
             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 
             dc.SetPen(*m_lightShadowPen);
 
             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 
             dc.SetPen(*m_lightShadowPen);

-            dc.DrawLine(1, m_sashPosition, w-2, m_sashPosition);
+            dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);

 
             dc.SetPen(*m_hilightPen);
 
             dc.SetPen(*m_hilightPen);

-            dc.DrawLine(0, m_sashPosition+1, w, m_sashPosition+1);
-
-            dc.SetPen(*m_mediumShadowPen);
-            dc.DrawLine(1, m_sashPosition+m_sashSize-2, w-1, m_sashPosition+m_sashSize-2);
-
-            dc.SetPen(*m_darkShadowPen);
-            dc.DrawLine(2, m_sashPosition+m_sashSize-1, w-2, m_sashPosition+m_sashSize-1);
+            dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
+
+            if (!HasFlag( wxSP_SASH_AQUA ))
+                dc.SetPen(*m_mediumShadowPen);
+            dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
+
+            if (HasFlag( wxSP_SASH_AQUA ))
+                dc.SetPen(*m_lightShadowPen);
+            else
+                dc.SetPen(*m_darkShadowPen);
+            dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
+
+            // Draw the left and right edges of the sash, if requested
+            if (GetWindowStyle() & wxSP_FULLSASH)
+            {
+                // Left
+                dc.SetPen(*m_hilightPen);
+                dc.DrawLine(m_borderSize, m_sashPosition, m_borderSize, m_sashPosition+m_sashSize);
+
+                // Right
+                dc.SetPen(*m_darkShadowPen);
+                dc.DrawLine(w-m_borderSize-1, m_sashPosition+1, w-m_borderSize-1, m_sashPosition+m_sashSize-1);
+            }

         }
     }
     else
         }
     }
     else


@@ -398,19 +579,28 @@ void wxSplitterWindow::DrawSash(wxDC& dc)
             dc.SetPen(*wxBLACK_PEN);
             dc.SetBrush(*wxBLACK_BRUSH);
             int h1 = h-1;
             dc.SetPen(*wxBLACK_PEN);
             dc.SetBrush(*wxBLACK_BRUSH);
             int h1 = h-1;

-            if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
+            int y1 = 0;
+            if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )

                 h1 += 1; // Not sure why this is necessary...
                 h1 += 1; // Not sure why this is necessary...

-            dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
+            if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
+            {
+                y1 = 2; h1 -= 3;
+            }
+            dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);

         }
         else
         {
             dc.SetPen(*wxBLACK_PEN);
             dc.SetBrush(*wxBLACK_BRUSH);
             int w1 = w-1;
         }
         else
         {
             dc.SetPen(*wxBLACK_PEN);
             dc.SetBrush(*wxBLACK_BRUSH);
             int w1 = w-1;

-            if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
+            int x1 = 0;
+            if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )

                 w1 ++;
                 w1 ++;

-
-            dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
+            if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
+            {
+                x1 = 2; w1 -= 3;
+            }
+            dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);

         }
 
     }
         }
 
     }


@@ -463,7 +653,7 @@ void wxSplitterWindow::DrawSashTracker(int x, int y)
     ClientToScreen(&x1, &y1);
     ClientToScreen(&x2, &y2);
 
     ClientToScreen(&x1, &y1);
     ClientToScreen(&x2, &y2);
 

-    screenDC.SetLogicalFunction(wxXOR);
+    screenDC.SetLogicalFunction(wxINVERT);

     screenDC.SetPen(*m_sashTrackerPen);
     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 
     screenDC.SetPen(*m_sashTrackerPen);
     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 


@@ -475,46 +665,128 @@ void wxSplitterWindow::DrawSashTracker(int x, int y)
     screenDC.SetBrush(wxNullBrush);
 }
 
     screenDC.SetBrush(wxNullBrush);
 }
 

+int wxSplitterWindow::GetWindowSize() const
+{
+    wxSize size = GetClientSize();
+
+    return m_splitMode == wxSPLIT_VERTICAL ? size.x : size.y;
+}
+
+int wxSplitterWindow::AdjustSashPosition(int sashPos) const
+{
+    int window_size = GetWindowSize();
+
+    wxWindow *win;
+
+    win = GetWindow1();
+    if ( win )
+    {
+        // the window shouldn't be smaller than its own minimal size nor
+        // smaller than the minimual pane size specified for this splitter
+        int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
+                                                      : win->GetMinHeight();
+
+        if ( minSize == -1 || m_minimumPaneSize > minSize )
+            minSize = m_minimumPaneSize;
+
+        minSize += GetBorderSize();
+
+        if ( sashPos < minSize )
+            sashPos = minSize;
+    }
+
+    win = GetWindow2();
+    if ( win )
+    {
+        int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
+                                                      : win->GetMinHeight();
+
+        if ( minSize == -1 || m_minimumPaneSize > minSize )
+            minSize = m_minimumPaneSize;
+
+        int maxSize = window_size - minSize - GetBorderSize();
+        if ( sashPos > maxSize )
+            sashPos = maxSize;
+    }
+
+    return sashPos;
+}
+
+void wxSplitterWindow::DoSetSashPosition(int sashPos)
+{
+    int newSashPosition = AdjustSashPosition(sashPos);
+
+    if ( newSashPosition != m_sashPosition )
+    {
+        m_sashPosition = newSashPosition;
+
+        wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED, this);
+        event.m_data.pos = m_sashPosition;
+
+        (void)DoSendEvent(event);
+    }
+}
+

 // Position and size subwindows.
 // Note that the border size applies to each subwindow, not
 // including the edges next to the sash.
 void wxSplitterWindow::SizeWindows()
 {
 // Position and size subwindows.
 // Note that the border size applies to each subwindow, not
 // including the edges next to the sash.
 void wxSplitterWindow::SizeWindows()
 {

+    // check if we have delayed setting the real sash position
+    if ( m_requestedSashPosition != INT_MAX )
+    {
+        int newSashPosition = ConvertSashPosition(m_requestedSashPosition);
+        if ( newSashPosition != m_sashPosition )
+        {
+            DoSetSashPosition(newSashPosition);
+        }
+
+        if ( newSashPosition == m_sashPosition )
+        {
+            // don't update it any more
+            m_requestedSashPosition = INT_MAX;
+        }
+    }
+

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

-    if ( m_windowOne && !m_windowTwo )
+    if ( GetWindow1() && !GetWindow2() )

     {
     {

-        m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
+        GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(), 
+                              w - 2*GetBorderSize(), h - 2*GetBorderSize());

     }
     }

-    else if ( m_windowOne && m_windowTwo )
+    else if ( GetWindow1() && GetWindow2() )

     {
     {

-        if (m_splitMode == wxSPLIT_VERTICAL)
+        if (GetSplitMode() == wxSPLIT_VERTICAL)

         {
         {

-            int x1 = m_borderSize;
-            int y1 = m_borderSize;
-            int w1 = m_sashPosition - m_borderSize;
-            int h1 = h - 2*m_borderSize;
-
-            int x2 = m_sashPosition + m_sashSize;
-            int y2 = m_borderSize;
-            int w2 = w - 2*m_borderSize - m_sashSize - w1;
-            int h2 = h - 2*m_borderSize;
-
-            m_windowOne->SetSize(x1, y1, w1, h1);
-            m_windowTwo->SetSize(x2, y2, w2, h2);
+            int x1 = GetBorderSize();
+            int y1 = GetBorderSize();
+            int w1 = GetSashPosition() - GetBorderSize();
+            int h1 = h - 2*GetBorderSize();
+
+            int x2 = GetSashPosition() + GetSashSize();
+            int y2 = GetBorderSize();
+            int w2 = w - 2*GetBorderSize() - GetSashSize() - w1;
+            int h2 = h - 2*GetBorderSize();
+
+            GetWindow1()->SetSize(x1, y1, w1, h1);
+            GetWindow2()->SetSize(x2, y2, w2, h2);

         }
         else
         {
         }
         else
         {

-            m_windowOne->SetSize(m_borderSize, m_borderSize,
-                w - 2*m_borderSize, m_sashPosition - m_borderSize);
-            m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
-                w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
+            GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
+                w - 2*GetBorderSize(), GetSashPosition() - GetBorderSize());
+            GetWindow2()->SetSize(GetBorderSize(), GetSashPosition() + GetSashSize(),
+                w - 2*GetBorderSize(), h - 2*GetBorderSize() - GetSashSize() - (GetSashPosition() - GetBorderSize()));

         }
     }
     wxClientDC dc(this);
         }
     }
     wxClientDC dc(this);

-    DrawBorders(dc);
+    if ( GetBorderSize() > 0 )
+        DrawBorders(dc);

     DrawSash(dc);
     DrawSash(dc);

+
+    SetNeedUpdating(FALSE);

 }
 
 // Set pane for unsplit window
 }
 
 // Set pane for unsplit window


@@ -522,59 +794,52 @@ void wxSplitterWindow::Initialize(wxWindow *window)
 {
     m_windowOne = window;
     m_windowTwo = (wxWindow *) NULL;
 {
     m_windowOne = window;
     m_windowTwo = (wxWindow *) NULL;

-    m_sashPosition = 0;
+    DoSetSashPosition(0);

 }
 
 // Associates the given window with window 2, drawing the appropriate sash
 // and changing the split mode.
 // Does nothing and returns FALSE if the window is already split.
 }
 
 // Associates the given window with window 2, drawing the appropriate sash
 // and changing the split mode.
 // Does nothing and returns FALSE if the window is already split.

-bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
+bool wxSplitterWindow::DoSplit(wxSplitMode mode,
+                               wxWindow *window1, wxWindow *window2,
+                               int sashPosition)

 {
     if ( IsSplit() )
         return FALSE;
 
 {
     if ( IsSplit() )
         return FALSE;
 

-    int w, h;
-    GetClientSize(&w, &h);
-
-    m_splitMode = wxSPLIT_VERTICAL;
+    m_splitMode = mode;

     m_windowOne = window1;
     m_windowTwo = window2;
     m_windowOne = window1;
     m_windowTwo = window2;

-    if ( sashPosition > 0 )
-        m_sashPosition = sashPosition;
-    else if ( sashPosition < 0 )
-        m_sashPosition = w - sashPosition;
-    else    // default
-        m_sashPosition = w/2;
+
+    // remember the sash position we want to set for later if we can't set it
+    // right now (e.g. because the window is too small)
+    m_requestedSashPosition = sashPosition;
+
+    DoSetSashPosition(ConvertSashPosition(sashPosition));

 
     SizeWindows();
 
     return TRUE;
 }
 
 
     SizeWindows();
 
     return TRUE;
 }
 

-bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
+int wxSplitterWindow::ConvertSashPosition(int sashPosition) const

 {
 {

-    if ( IsSplit() )
-        return FALSE;
-
-    int w, h;
-    GetClientSize(&w, &h);
-
-    m_splitMode = wxSPLIT_HORIZONTAL;
-    m_windowOne = window1;
-    m_windowTwo = window2;

     if ( sashPosition > 0 )
     if ( sashPosition > 0 )

-        m_sashPosition = sashPosition;
+    {
+        return sashPosition;
+    }

     else if ( sashPosition < 0 )
     else if ( sashPosition < 0 )

-        m_sashPosition = h - sashPosition;
-    else    // default
-        m_sashPosition = h/2;
-
-    SizeWindows();
-
-    return TRUE;
+    {
+        // It's negative so adding is subtracting
+        return GetWindowSize() + sashPosition;
+    }
+    else // sashPosition == 0
+    {
+        // default, put it in the centre
+        return GetWindowSize() / 2;
+    }

 }
 
 }
 

-

 // Remove the specified (or second) window from the view
 // Doesn't actually delete the window.
 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 // Remove the specified (or second) window from the view
 // Doesn't actually delete the window.
 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)


@@ -596,13 +861,13 @@ bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
     }
     else
     {
     }
     else
     {

-        wxFAIL_MSG(_T("splitter: attempt to remove a non-existent window"));
+        wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));

 
         return FALSE;
     }
 
     OnUnsplit(win);
 
         return FALSE;
     }
 
     OnUnsplit(win);

-    m_sashPosition = 0;
+    DoSetSashPosition(0);

     SizeWindows();
 
     return TRUE;
     SizeWindows();
 
     return TRUE;


@@ -611,8 +876,8 @@ bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 // Replace a window with another one
 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 {
 // Replace a window with another one
 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 {

-    wxCHECK_MSG( winOld, FALSE, _T("use one of Split() functions instead") );
-    wxCHECK_MSG( winNew, FALSE, _T("use Unsplit() functions instead") );
+    wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
+    wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );

 
     if ( winOld == m_windowTwo )
     {
 
     if ( winOld == m_windowTwo )
     {


@@ -624,7 +889,7 @@ bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
     }
     else
     {
     }
     else
     {

-        wxFAIL_MSG(_T("splitter: attempt to replace a non-existent window"));
+        wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));

 
         return FALSE;
     }
 
         return FALSE;
     }


@@ -634,9 +899,15 @@ bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
     return TRUE;
 }
 
     return TRUE;
 }
 

+void wxSplitterWindow::SetMinimumPaneSize(int min)
+{
+    m_minimumPaneSize = min;
+    SetSashPosition(m_sashPosition); // re-check limits
+}
+

 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 {
 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 {

-    m_sashPosition = position;
+    DoSetSashPosition(position);

 
     if ( redraw )
     {
 
     if ( redraw )
     {


@@ -644,90 +915,168 @@ void wxSplitterWindow::SetSashPosition(int position, bool redraw)
     }
 }
 
     }
 }
 

-bool wxSplitterWindow::OnSashPositionChange(int& newSashPosition)
+// Initialize colours
+void wxSplitterWindow::InitColours()
+{
+    wxDELETE( m_facePen );
+    wxDELETE( m_faceBrush );
+    wxDELETE( m_mediumShadowPen );
+    wxDELETE( m_darkShadowPen );
+    wxDELETE( m_lightShadowPen );
+    wxDELETE( m_hilightPen );
+
+    // Shadow colours
+#ifndef __WIN16__
+    wxColour faceColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
+    m_facePen = new wxPen(faceColour, 1, wxSOLID);
+    m_faceBrush = new wxBrush(faceColour, wxSOLID);
+
+    wxColour mediumShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW));
+    m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
+
+    wxColour darkShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW));
+    m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
+
+    wxColour lightShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT));
+    m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
+
+    wxColour hilightColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT));
+    m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
+#else
+    m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
+    m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
+    m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
+    m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
+    m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
+    m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
+#endif // __WIN16__
+}
+
+bool wxSplitterWindow::DoSendEvent(wxSplitterEvent& event)
+{
+    return !GetEventHandler()->ProcessEvent(event) || event.IsAllowed();
+}
+
+// ---------------------------------------------------------------------------
+// wxSplitterWindow virtual functions: they now just generate the events
+// ---------------------------------------------------------------------------
+
+bool wxSplitterWindow::OnSashPositionChange(int WXUNUSED(newSashPosition))
+{
+    // always allow by default
+    return TRUE;
+}
+
+int wxSplitterWindow::OnSashPositionChanging(int newSashPosition)

 {
     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
     const int UNSPLIT_THRESHOLD = 4;
 
 {
     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
     const int UNSPLIT_THRESHOLD = 4;
 

-    if (newSashPosition <= UNSPLIT_THRESHOLD)   // threshold top / left check
+    // first of all, check if OnSashPositionChange() doesn't forbid this change
+    if ( !OnSashPositionChange(newSashPosition) )

     {
     {

-        newSashPosition = 0;
-        return TRUE;
+        // it does
+        return -1;

     }
 
     // Obtain relevant window dimension for bottom / right threshold check
     }
 
     // Obtain relevant window dimension for bottom / right threshold check

-    int w, h;
-    GetClientSize(&w, &h);
-    int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
+    int window_size = GetWindowSize();

 
 

-    if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
+    bool unsplit_scenario = FALSE;
+    if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )

     {
     {

-        newSashPosition = window_size;
-        return TRUE;
+        // Do edge detection if unsplit premitted
+        if ( newSashPosition <= UNSPLIT_THRESHOLD )
+        {
+            // threshold top / left check
+            newSashPosition = 0;
+            unsplit_scenario = TRUE;
+        }
+        if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
+        {
+            // threshold bottom/right check
+            newSashPosition = window_size;
+            unsplit_scenario = TRUE;
+        }

     }
 
     }
 

-    // If resultant pane would be too small, enlarge it.
+    if ( !unsplit_scenario )
+    {
+        // If resultant pane would be too small, enlarge it
+        newSashPosition = AdjustSashPosition(newSashPosition);
+    }

 
 

-    // Check upper / left pane
-    if ( newSashPosition < m_minimumPaneSize )
-        newSashPosition = m_minimumPaneSize;   // NB: don't return just yet
+    // If the result is out of bounds it means minimum size is too big,
+    // so split window in half as best compromise.
+    if ( newSashPosition < 0 || newSashPosition > window_size )
+        newSashPosition = window_size / 2;

 
 

-    // Check lower / right pane (check even if sash was just adjusted)
-    if ( newSashPosition > window_size - m_minimumPaneSize )
-        newSashPosition = window_size - m_minimumPaneSize;
+    // now let the event handler have it
+    //
+    // FIXME: shouldn't we do it before the adjustments above so as to ensure
+    //        that the sash position is always reasonable?
+    wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING, this);
+    event.m_data.pos = newSashPosition;

 
 

-    // If the result is out of bounds it means minimum size is too big, so
-    // split window in half as best compromise.
-    if (newSashPosition < 0 || newSashPosition > window_size)
-        newSashPosition = window_size / 2;
-    return TRUE;
+    if ( !DoSendEvent(event) )
+    {
+        // the event handler vetoed the change
+        newSashPosition = -1;
+    }
+    else
+    {
+        // it could have been changed by it
+        newSashPosition = event.GetSashPosition();
+    }
+
+    return newSashPosition;

 }
 
 }
 

-// Called when the sash is double-clicked.
-// The default behaviour is to remove the sash if the
-// minimum pane size is zero.
-void wxSplitterWindow::OnDoubleClickSash(int WXUNUSED(x), int WXUNUSED(y) )
+// Called when the sash is double-clicked. The default behaviour is to remove
+// the sash if the minimum pane size is zero.
+void wxSplitterWindow::OnDoubleClickSash(int x, int y)

 {
 {

-    if ( GetMinimumPaneSize() == 0 )
+    // new code should handle events instead of using the virtual functions
+    wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED, this);
+    event.m_data.pt.x = x;
+    event.m_data.pt.y = y;
+    if ( DoSendEvent(event) )

     {
     {

-        Unsplit();
+        if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
+        {
+            Unsplit();
+        }

     }
     }

+    //else: blocked by user

 }
 
 }
 

-// Initialize colours
-void wxSplitterWindow::InitColours()
+void wxSplitterWindow::OnUnsplit(wxWindow *winRemoved)

 {
 {

-    wxDELETE( m_facePen );
-    wxDELETE( m_faceBrush );
-    wxDELETE( m_mediumShadowPen );
-    wxDELETE( m_darkShadowPen );
-    wxDELETE( m_lightShadowPen );
-    wxDELETE( m_hilightPen );
+    // do it before calling the event handler which may delete the window
+    winRemoved->Show(FALSE);

 
 

-    // Shadow colours
-#if defined(__WIN95__)
-    wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
-    m_facePen = new wxPen(faceColour, 1, wxSOLID);
-    m_faceBrush = new wxBrush(faceColour, wxSOLID);
+    wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
+    event.m_data.win = winRemoved;

 
 

-    wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
-    m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
+    (void)DoSendEvent(event);
+}

 
 

-    wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
-    m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
+#ifdef __WXMSW__

 
 

-    wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
-    m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
+// this is currently called (and needed) under MSW only...
+void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& event)
+{
+    // if we don't do it, the resizing cursor might be set for child window:
+    // and like this we explicitly say that our cursor should not be used for
+    // children windows which overlap us

 
 

-    wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
-    m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
-#else // !Win32
-    m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
-    m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
-    m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
-    m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
-    m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
-    m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
-#endif // Win32/!Win32
+    if ( SashHitTest(event.GetX(), event.GetY()) )
+    {
+        // default processing is ok
+        event.Skip();
+    }
+    //else: do nothing, in particular, don't call Skip()

 }
 
 }
 

+#endif // wxMSW
+