contrib/utils/wxrcedit/splittree.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        splittree.cpp
   3 // Purpose:     Classes to achieve a remotely-scrolled tree in a splitter
   4 //              window that can be scrolled by a scrolled window higher in the
   5 //              hierarchy
   6 // Author:      Julian Smart
   7 // Modified by:
   8 // Created:     8/7/2000
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Julian Smart
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14 // ============================================================================
  15 // declarations
  16 // ============================================================================
  17
  18 // ----------------------------------------------------------------------------
  19 // headers
  20 // ----------------------------------------------------------------------------
  21 #ifdef __GNUG__
  22     #pragma implementation "splittree.h"
  23 #endif
  24
  25 // For compilers that support precompilation, includes "wx/wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #ifdef __BORLANDC__
  29     #pragma hdrstop
  30 #endif
  31
  32 // for all others, include the necessary headers (this file is usually all you
  33 // need because it includes almost all "standard" wxWindows headers)
  34 #ifndef WX_PRECOMP
  35     #include "wx/wx.h"
  36 #endif
  37
  38 #ifdef __WXMSW__
  39 #include <windows.h>
  40 #include "wx/msw/winundef.h"
  41 #endif
  42
  43 #include "wx/gizmos/splittree.h"
  44 #include <math.h>
  45
  46 /*
  47  * wxRemotelyScrolledTreeCtrl
  48  */
  49
  50 #if USE_GENERIC_TREECTRL
  51 IMPLEMENT_CLASS(wxRemotelyScrolledTreeCtrl, wxGenericTreeCtrl)
  52 #else
  53 IMPLEMENT_CLASS(wxRemotelyScrolledTreeCtrl, wxTreeCtrl)
  54 #endif
  55
  56 #if USE_GENERIC_TREECTRL
  57 BEGIN_EVENT_TABLE(wxRemotelyScrolledTreeCtrl, wxGenericTreeCtrl)
  58 #else
  59 BEGIN_EVENT_TABLE(wxRemotelyScrolledTreeCtrl, wxTreeCtrl)
  60 #endif
  61         EVT_SIZE(wxRemotelyScrolledTreeCtrl::OnSize)
  62         EVT_TREE_ITEM_EXPANDED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)
  63         EVT_TREE_ITEM_COLLAPSED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)
  64         EVT_SCROLLWIN(wxRemotelyScrolledTreeCtrl::OnScroll)
  65 END_EVENT_TABLE()
  66
  67 wxRemotelyScrolledTreeCtrl::wxRemotelyScrolledTreeCtrl(wxWindow* parent, wxWindowID id, const wxPoint& pt,
  68         const wxSize& sz, long style):
  69         wxTreeCtrl(parent, id, pt, sz, style)
  70 {
  71         m_companionWindow = NULL;
  72 }
  73
  74 wxRemotelyScrolledTreeCtrl::~wxRemotelyScrolledTreeCtrl()
  75 {
  76 }
  77
  78 void wxRemotelyScrolledTreeCtrl::HideVScrollbar()
  79 {
  80 #if defined(__WXMSW__) && USE_GENERIC_TREECTRL
  81     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
  82     {
  83         ::ShowScrollBar((HWND) GetHWND(), SB_VERT, FALSE);
  84     }
  85     else
  86 #endif
  87     {
  88         // Implicit in overriding SetScrollbars
  89     }
  90 }
  91
  92 // Number of pixels per user unit (0 or -1 for no scrollbar)
  93 // Length of virtual canvas in user units
  94 // Length of page in user units
  95 void wxRemotelyScrolledTreeCtrl::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
  96                              int noUnitsX, int noUnitsY,
  97                              int xPos, int yPos,
  98                              bool noRefresh)
  99 {
 100 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 101     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 102     {
 103         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 104         win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, 0, noUnitsX, 0, xPos, 0, noRefresh);
 105
 106             wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 107             if (scrolledWindow)
 108             {
 109             scrolledWindow->SetScrollbars(0, pixelsPerUnitY, 0, noUnitsY, 0, yPos, noRefresh);
 110         }
 111     }
 112 #endif
 113 }
 114
 115 // In case we're using the generic tree control.
 116 int wxRemotelyScrolledTreeCtrl::GetScrollPos(int orient) const
 117 {
 118     wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 119
 120 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 121     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 122     {
 123         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 124
 125         if (orient == wxHORIZONTAL)
 126             return win->wxGenericTreeCtrl::GetScrollPos(orient);
 127         else
 128         {
 129             return scrolledWindow->GetScrollPos(orient);
 130         }
 131     }
 132 #endif
 133     return 0;
 134 }
 135
 136
 137 // In case we're using the generic tree control.
 138 // Get the view start
 139 void wxRemotelyScrolledTreeCtrl::GetViewStart(int *x, int *y) const
 140 {
 141     wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 142
 143 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 144     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 145     {
 146
 147         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 148         int x1, y1, x2, y2;
 149         win->wxGenericTreeCtrl::GetViewStart(& x1, & y1);
 150         * x = x1; * y = y1;
 151         if (!scrolledWindow)
 152             return;
 153
 154         scrolledWindow->GetViewStart(& x2, & y2);
 155         * y = y2;
 156     }
 157         else
 158 #endif
 159         {
 160                 // x is wrong since the horizontal scrollbar is controlled by the
 161                 // tree control, but we probably don't need it.
 162         scrolledWindow->GetViewStart(x, y);
 163         }
 164 }
 165
 166 // In case we're using the generic tree control.
 167 void wxRemotelyScrolledTreeCtrl::PrepareDC(wxDC& dc)
 168 {
 169 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 170     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 171     {
 172             wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 173
 174         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 175
 176         int startX, startY;
 177         GetViewStart(& startX, & startY);
 178
 179         int xppu1, yppu1, xppu2, yppu2;
 180         win->wxGenericTreeCtrl::GetScrollPixelsPerUnit(& xppu1, & yppu1);
 181         scrolledWindow->GetScrollPixelsPerUnit(& xppu2, & yppu2);
 182
 183         dc.SetDeviceOrigin( -startX * xppu1, -startY * yppu2 );
 184         // dc.SetUserScale( win->GetScaleX(), win->GetScaleY() );
 185     }
 186 #endif
 187 }
 188
 189 // Scroll to the given line (in scroll units where each unit is
 190 // the height of an item)
 191 void wxRemotelyScrolledTreeCtrl::ScrollToLine(int posHoriz, int posVert)
 192 {
 193 #ifdef __WXMSW__
 194 #if USE_GENERIC_TREECTRL
 195     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 196 #endif
 197     {
 198             UINT sbCode = SB_THUMBPOSITION;
 199             HWND vertScrollBar = 0;
 200             MSWDefWindowProc((WXUINT) WM_VSCROLL, MAKELONG(sbCode, posVert), (WXHWND) vertScrollBar);
 201     }
 202 #if USE_GENERIC_TREECTRL
 203     else
 204 #endif
 205 #endif
 206 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 207     {
 208         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 209                 win->Refresh();
 210                 /* Doesn't work yet because scrolling is ignored by Scroll
 211         int xppu, yppu;
 212             wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 213             if (scrolledWindow)
 214             {
 215                         scrolledWindow->GetScrollPixelsPerUnit(& xppu, & yppu);
 216                         win->Scroll(-1, posVert*yppu);
 217                 }
 218                 */
 219     }
 220 #endif
 221 }
 222
 223 void wxRemotelyScrolledTreeCtrl::OnSize(wxSizeEvent& event)
 224 {
 225         HideVScrollbar();
 226         AdjustRemoteScrollbars();
 227         event.Skip();
 228 }
 229
 230 void wxRemotelyScrolledTreeCtrl::OnExpand(wxTreeEvent& event)
 231 {
 232         AdjustRemoteScrollbars();
 233         event.Skip();
 234
 235     // If we don't have this, we get some bits of lines still remaining
 236     if (event.GetEventType() == wxEVT_COMMAND_TREE_ITEM_COLLAPSED)
 237         Refresh();
 238
 239         // Pass on the event
 240         if (m_companionWindow)
 241                 m_companionWindow->GetEventHandler()->ProcessEvent(event);
 242 }
 243
 244 // Adjust the containing wxScrolledWindow's scrollbars appropriately
 245 void wxRemotelyScrolledTreeCtrl::AdjustRemoteScrollbars()
 246 {
 247 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 248     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 249         {
 250                 // This is for the generic tree control.
 251                 // It calls SetScrollbars which has been overridden
 252                 // to adjust the parent scrolled window vertical
 253                 // scrollbar.
 254                 ((wxGenericTreeCtrl*) this)->AdjustMyScrollbars();
 255         return;
 256         }
 257         else
 258 #endif
 259         {
 260                 // This is for the wxMSW tree control
 261                 wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 262                 if (scrolledWindow)
 263                 {
 264                         wxRect itemRect;
 265                         if (GetBoundingRect(GetRootItem(), itemRect))
 266                         {
 267                 // Actually, the real height seems to be 1 less than reported
 268                 // (e.g. 16 instead of 16)
 269                 int itemHeight = itemRect.GetHeight() - 1;
 270
 271                                 int w, h;
 272                                 GetClientSize(&w, &h);
 273
 274                                 wxRect rect(0, 0, 0, 0);
 275                                 CalcTreeSize(rect);
 276
 277                 double f = ((double) (rect.GetHeight()) / (double) itemHeight)  ;
 278                 int treeViewHeight = (int) ceil(f);
 279
 280                                 int scrollPixelsPerLine = itemHeight;
 281                                 int scrollPos = - (itemRect.y / itemHeight);
 282
 283                                 scrolledWindow->SetScrollbars(0, scrollPixelsPerLine, 0, treeViewHeight, 0, scrollPos);
 284
 285                                 // Ensure that when a scrollbar becomes hidden or visible,
 286                                 // the contained window sizes are right.
 287                                 // Problem: this is called too early (?)
 288                                 wxSizeEvent event(scrolledWindow->GetSize(), scrolledWindow->GetId());
 289                                 scrolledWindow->GetEventHandler()->ProcessEvent(event);
 290                         }
 291                 }
 292         }
 293 }
 294
 295
 296 // Calculate the area that contains both rectangles
 297 static wxRect CombineRectangles(const wxRect& rect1, const wxRect& rect2)
 298 {
 299     wxRect rect;
 300
 301     int right1 = rect1.GetRight();
 302     int bottom1 = rect1.GetBottom();
 303     int right2 = rect2.GetRight();
 304     int bottom2 = rect2.GetBottom();
 305
 306     wxPoint topLeft = wxPoint(wxMin(rect1.x, rect2.x), wxMin(rect1.y, rect2.y));
 307     wxPoint bottomRight = wxPoint(wxMax(right1, right2), wxMax(bottom1, bottom2));
 308
 309     rect.x = topLeft.x; rect.y = topLeft.y;
 310     rect.SetRight(bottomRight.x);
 311     rect.SetBottom(bottomRight.y);
 312
 313     return rect;
 314 }
 315
 316
 317 // Calculate the tree overall size so we can set the scrollbar
 318 // correctly
 319 void wxRemotelyScrolledTreeCtrl::CalcTreeSize(wxRect& rect)
 320 {
 321         CalcTreeSize(GetRootItem(), rect);
 322 }
 323
 324 void wxRemotelyScrolledTreeCtrl::CalcTreeSize(const wxTreeItemId& id, wxRect& rect)
 325 {
 326         // More efficient implementation would be to find the last item (but how?)
 327         // Q: is the bounding rect relative to the top of the virtual tree workspace
 328         // or the top of the window? How would we convert?
 329         wxRect itemSize;
 330         if (GetBoundingRect(id, itemSize))
 331         {
 332                 rect = CombineRectangles(rect, itemSize);
 333         }
 334
 335         long cookie;
 336         wxTreeItemId childId = GetFirstChild(id, cookie);
 337         while (childId != 0)
 338         {
 339                 CalcTreeSize(childId, rect);
 340                 childId = GetNextChild(childId, cookie);
 341         }
 342 }
 343
 344 // Find the scrolled window that contains this control
 345 wxScrolledWindow* wxRemotelyScrolledTreeCtrl::GetScrolledWindow() const
 346 {
 347         wxWindow* parent = wxWindow::GetParent();
 348         while (parent)
 349         {
 350                 if (parent->IsKindOf(CLASSINFO(wxScrolledWindow)))
 351                         return (wxScrolledWindow*) parent;
 352                 parent = parent->GetParent();
 353         }
 354         return NULL;
 355 }
 356
 357 void wxRemotelyScrolledTreeCtrl::OnScroll(wxScrollWinEvent& event)
 358 {
 359     int orient = event.GetOrientation();
 360     if (orient == wxHORIZONTAL)
 361     {
 362         event.Skip();
 363         return;
 364     }
 365     wxScrolledWindow* scrollWin = GetScrolledWindow();
 366     if (!scrollWin)
 367         return;
 368
 369     int x, y;
 370     scrollWin->GetViewStart(& x, & y);
 371
 372     ScrollToLine(-1, y);
 373 }
 374
 375 /*
 376  * wxTreeCompanionWindow
 377  *
 378  * A window displaying values associated with tree control items.
 379  */
 380
 381 IMPLEMENT_CLASS(wxTreeCompanionWindow, wxWindow)
 382
 383 BEGIN_EVENT_TABLE(wxTreeCompanionWindow, wxWindow)
 384         EVT_PAINT(wxTreeCompanionWindow::OnPaint)
 385         EVT_SCROLLWIN(wxTreeCompanionWindow::OnScroll)
 386         EVT_TREE_ITEM_EXPANDED(-1, wxTreeCompanionWindow::OnExpand)
 387         EVT_TREE_ITEM_COLLAPSED(-1, wxTreeCompanionWindow::OnExpand)
 388 END_EVENT_TABLE()
 389
 390 wxTreeCompanionWindow::wxTreeCompanionWindow(wxWindow* parent, wxWindowID id,
 391       const wxPoint& pos,
 392       const wxSize& sz,
 393       long style):
 394         wxWindow(parent, id, pos, sz, style)
 395 {
 396         m_treeCtrl = NULL;
 397 }
 398
 399 void wxTreeCompanionWindow::DrawItem(wxDC& dc, wxTreeItemId id, const wxRect& rect)
 400 {
 401         // TEST CODE
 402 #if 1
 403         if (m_treeCtrl)
 404         {
 405                 wxString text = m_treeCtrl->GetItemText(id);
 406                 dc.SetTextForeground(* wxBLACK);
 407                 dc.SetBackgroundMode(wxTRANSPARENT);
 408
 409                 int textW, textH;
 410                 dc.GetTextExtent(text, & textW, & textH);
 411
 412                 int x = 5;
 413                 int y = rect.GetY() + wxMax(0, (rect.GetHeight() - textH) / 2);
 414
 415                 dc.DrawText(text, x, y);
 416         }
 417 #endif
 418 }
 419
 420 void wxTreeCompanionWindow::OnPaint(wxPaintEvent& event)
 421 {
 422         wxPaintDC dc(this);
 423
 424     if (!m_treeCtrl)
 425         return;
 426
 427         wxPen pen(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);
 428         dc.SetPen(pen);
 429         dc.SetBrush(* wxTRANSPARENT_BRUSH);
 430         wxFont font(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 431         dc.SetFont(font);
 432
 433     wxSize clientSize = GetClientSize();
 434         wxRect itemRect;
 435         int cy=0;
 436         wxTreeItemId h, lastH;
 437         for(h=m_treeCtrl->GetFirstVisibleItem();h;h=m_treeCtrl->GetNextVisible(h))
 438         {
 439                 if (m_treeCtrl->GetBoundingRect(h, itemRect))
 440                 {
 441                         cy = itemRect.GetTop();
 442                         wxRect drawItemRect(0, cy, clientSize.x, itemRect.GetHeight());
 443
 444                         lastH = h;
 445
 446                         // Draw the actual item
 447                         DrawItem(dc, h, drawItemRect);
 448                         dc.DrawLine(0, cy, clientSize.x, cy);
 449                 }
 450         }
 451         if (lastH.IsOk() && m_treeCtrl->GetBoundingRect(lastH, itemRect))
 452         {
 453                 cy = itemRect.GetBottom();
 454                 dc.DrawLine(0, cy, clientSize.x, cy);
 455         }
 456 }
 457
 458 void wxTreeCompanionWindow::OnScroll(wxScrollWinEvent& event)
 459 {
 460     int orient = event.GetOrientation();
 461     if (orient == wxHORIZONTAL)
 462     {
 463         event.Skip();
 464         return;
 465     }
 466     if (!m_treeCtrl)
 467         return;
 468
 469         // TODO: scroll the window physically instead of just refreshing.
 470         Refresh(TRUE);
 471 }
 472
 473 void wxTreeCompanionWindow::OnExpand(wxTreeEvent& event)
 474 {
 475         // TODO: something more optimized than simply refresh the whole
 476         // window when the tree is expanded/collapsed. Tricky.
 477         Refresh();
 478 }
 479
 480 /*
 481  * wxThinSplitterWindow
 482  */
 483
 484 IMPLEMENT_CLASS(wxThinSplitterWindow, wxSplitterWindow)
 485
 486 BEGIN_EVENT_TABLE(wxThinSplitterWindow, wxSplitterWindow)
 487         EVT_SIZE(wxThinSplitterWindow::OnSize)
 488 END_EVENT_TABLE()
 489
 490 wxThinSplitterWindow::wxThinSplitterWindow(wxWindow* parent, wxWindowID id,
 491       const wxPoint& pos,
 492       const wxSize& sz,
 493       long style):
 494       wxSplitterWindow(parent, id, pos, sz, style)
 495 {
 496 }
 497
 498 void wxThinSplitterWindow::SizeWindows()
 499 {
 500         // The client size may have changed inbetween
 501         // the sizing of the first window and the sizing of
 502         // the second. So repeat SizeWindows.
 503     wxSplitterWindow::SizeWindows();
 504     wxSplitterWindow::SizeWindows();
 505 }
 506
 507 // Tests for x, y over sash
 508 bool wxThinSplitterWindow::SashHitTest(int x, int y, int tolerance)
 509 {
 510         return wxSplitterWindow::SashHitTest(x, y, 4);
 511 }
 512
 513 void wxThinSplitterWindow::DrawSash(wxDC& dc)
 514 {
 515     if ( m_sashPosition == 0 || !m_windowTwo)
 516         return;
 517     if (GetWindowStyle() & wxSP_NOSASH)
 518         return;
 519
 520     int w, h;
 521     GetClientSize(&w, &h);
 522
 523         if ( m_splitMode == wxSPLIT_VERTICAL )
 524         {
 525                 dc.SetPen(* m_facePen);
 526                 dc.SetBrush(* m_faceBrush);
 527                 int h1 = h-1;
 528                 int y1 = 0;
 529                 if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 530                         h1 += 1; // Not sure why this is necessary...
 531                 if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 532                 {
 533                         y1 = 2; h1 -= 3;
 534                 }
 535                 dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 536         }
 537         else
 538         {
 539                 dc.SetPen(* m_facePen);
 540                 dc.SetBrush(* m_faceBrush);
 541                 int w1 = w-1;
 542                 int x1 = 0;
 543                 if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 544                         w1 ++;
 545                 if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 546                 {
 547                         x1 = 2; w1 -= 3;
 548                 }
 549                 dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 550         }
 551
 552     dc.SetPen(wxNullPen);
 553     dc.SetBrush(wxNullBrush);
 554 }
 555
 556 void wxThinSplitterWindow::OnSize(wxSizeEvent& event)
 557 {
 558         wxSplitterWindow::OnSize(event);
 559 }
 560
 561 /*
 562  * wxSplitterScrolledWindow
 563  */
 564
 565 IMPLEMENT_CLASS(wxSplitterScrolledWindow, wxScrolledWindow)
 566
 567 BEGIN_EVENT_TABLE(wxSplitterScrolledWindow, wxScrolledWindow)
 568         EVT_SCROLLWIN(wxSplitterScrolledWindow::OnScroll)
 569         EVT_SIZE(wxSplitterScrolledWindow::OnSize)
 570 END_EVENT_TABLE()
 571
 572 wxSplitterScrolledWindow::wxSplitterScrolledWindow(wxWindow* parent, wxWindowID id,
 573       const wxPoint& pos,
 574       const wxSize& sz,
 575       long style):
 576       wxScrolledWindow(parent, id, pos, sz, style)
 577 {
 578 }
 579
 580 void wxSplitterScrolledWindow::OnSize(wxSizeEvent& event)
 581 {
 582         wxSize sz = GetClientSize();
 583         if (GetChildren().First())
 584         {
 585                 ((wxWindow*) GetChildren().First()->Data())->SetSize(0, 0, sz.x, sz.y);
 586         }
 587 }
 588
 589 void wxSplitterScrolledWindow::OnScroll(wxScrollWinEvent& event)
 590 {
 591     // Ensure that events being propagated back up the window hierarchy
 592     // don't cause an infinite loop
 593     static bool inOnScroll = FALSE;
 594     if (inOnScroll)
 595     {
 596         event.Skip();
 597         return;
 598     }
 599     inOnScroll = TRUE;
 600
 601     int orient = event.GetOrientation();
 602
 603     int nScrollInc = CalcScrollInc(event);
 604     if (nScrollInc == 0)
 605     {
 606         inOnScroll = FALSE;
 607         return;
 608     }
 609
 610     if (orient == wxHORIZONTAL)
 611     {
 612         inOnScroll = FALSE;
 613         event.Skip();
 614         return;
 615 #if 0
 616         int newPos = m_xScrollPosition + nScrollInc;
 617         SetScrollPos(wxHORIZONTAL, newPos, TRUE );
 618 #endif
 619     }
 620     else
 621     {
 622         int newPos = m_yScrollPosition + nScrollInc;
 623         SetScrollPos(wxVERTICAL, newPos, TRUE );
 624     }
 625
 626     if (orient == wxHORIZONTAL)
 627     {
 628         m_xScrollPosition += nScrollInc;
 629     }
 630     else
 631     {
 632         m_yScrollPosition += nScrollInc;
 633     }
 634
 635     // Find targets in splitter window and send the event to them
 636     wxNode* node = GetChildren().First();
 637     while (node)
 638     {
 639         wxWindow* child = (wxWindow*) node->Data();
 640         if (child->IsKindOf(CLASSINFO(wxSplitterWindow)))
 641         {
 642             wxSplitterWindow* splitter = (wxSplitterWindow*) child;
 643             if (splitter->GetWindow1())
 644                 splitter->GetWindow1()->ProcessEvent(event);
 645             if (splitter->GetWindow2())
 646                 splitter->GetWindow2()->ProcessEvent(event);
 647             break;
 648         }
 649         node = node->Next();
 650     }
 651
 652 #ifdef __WXMAC__
 653     m_targetWindow->MacUpdateImmediately() ;
 654 #endif
 655
 656     inOnScroll = FALSE;
 657 }
 658