contrib/src/gizmos/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_PAINT(wxRemotelyScrolledTreeCtrl::OnPaint)
  63     EVT_TREE_ITEM_EXPANDED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)
  64     EVT_TREE_ITEM_COLLAPSED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)
  65     EVT_SCROLLWIN(wxRemotelyScrolledTreeCtrl::OnScroll)
  66 END_EVENT_TABLE()
  67
  68 wxRemotelyScrolledTreeCtrl::wxRemotelyScrolledTreeCtrl(
  69     wxWindow* parent, wxWindowID id, const wxPoint& pt,
  70     const wxSize& sz, long style)
  71     : wxTreeCtrl(parent, id, pt, sz, style & ~wxTR_ROW_LINES)
  72 {
  73     m_companionWindow = NULL;
  74
  75     // We draw the row lines ourself so they match what's done
  76     // by the companion window.  That is why the flag is turned
  77     // off above, so wxGenericTreeCtrl doesn't draw them in a
  78     // different colour.
  79     m_drawRowLines = (style & wxTR_ROW_LINES) != 0;
  80 }
  81
  82 wxRemotelyScrolledTreeCtrl::~wxRemotelyScrolledTreeCtrl()
  83 {
  84 }
  85
  86 void wxRemotelyScrolledTreeCtrl::HideVScrollbar()
  87 {
  88 #if defined(__WXMSW__)
  89 #if USE_GENERIC_TREECTRL
  90     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
  91 #endif
  92     {
  93         ::ShowScrollBar((HWND) GetHWND(), SB_VERT, FALSE);
  94     }
  95 #if USE_GENERIC_TREECTRL
  96     else
  97     {
  98         // Implicit in overriding SetScrollbars
  99     }
 100 #endif
 101 #endif
 102 }
 103
 104 // Number of pixels per user unit (0 or -1 for no scrollbar)
 105 // Length of virtual canvas in user units
 106 // Length of page in user units
 107 void wxRemotelyScrolledTreeCtrl::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
 108                              int noUnitsX, int noUnitsY,
 109                              int xPos, int yPos,
 110                              bool noRefresh)
 111 {
 112 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 113     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 114     {
 115         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 116         win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, 0, noUnitsX, 0, xPos, 0, noRefresh);
 117
 118         wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 119         if (scrolledWindow)
 120         {
 121             scrolledWindow->SetScrollbars(0, pixelsPerUnitY, 0, noUnitsY, 0, yPos, noRefresh);
 122         }
 123     }
 124 #endif
 125 }
 126
 127 // In case we're using the generic tree control.
 128 int wxRemotelyScrolledTreeCtrl::GetScrollPos(int orient) const
 129 {
 130     wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 131
 132 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 133     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 134     {
 135         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 136
 137         if (orient == wxHORIZONTAL)
 138             return win->wxGenericTreeCtrl::GetScrollPos(orient);
 139         else
 140         {
 141             return scrolledWindow->GetScrollPos(orient);
 142         }
 143     }
 144 #endif
 145     return 0;
 146 }
 147
 148
 149 // In case we're using the generic tree control.
 150 // Get the view start
 151 void wxRemotelyScrolledTreeCtrl::GetViewStart(int *x, int *y) const
 152 {
 153     wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 154
 155 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 156     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 157     {
 158
 159         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 160         int x1, y1, x2, y2;
 161         win->wxGenericTreeCtrl::GetViewStart(& x1, & y1);
 162         * x = x1; * y = y1;
 163         if (!scrolledWindow)
 164             return;
 165
 166         scrolledWindow->GetViewStart(& x2, & y2);
 167         * y = y2;
 168     }
 169     else
 170 #endif
 171     {
 172         // x is wrong since the horizontal scrollbar is controlled by the
 173         // tree control, but we probably don't need it.
 174         scrolledWindow->GetViewStart(x, y);
 175     }
 176 }
 177
 178 // In case we're using the generic tree control.
 179 void wxRemotelyScrolledTreeCtrl::PrepareDC(wxDC& dc)
 180 {
 181 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 182     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 183     {
 184         wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 185
 186         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 187
 188         int startX, startY;
 189         GetViewStart(& startX, & startY);
 190
 191         int xppu1, yppu1, xppu2, yppu2;
 192         win->wxGenericTreeCtrl::GetScrollPixelsPerUnit(& xppu1, & yppu1);
 193         scrolledWindow->GetScrollPixelsPerUnit(& xppu2, & yppu2);
 194
 195         dc.SetDeviceOrigin( -startX * xppu1, -startY * yppu2 );
 196         // dc.SetUserScale( win->GetScaleX(), win->GetScaleY() );
 197     }
 198 #endif
 199 }
 200
 201 // Scroll to the given line (in scroll units where each unit is
 202 // the height of an item)
 203 void wxRemotelyScrolledTreeCtrl::ScrollToLine(int posHoriz, int posVert)
 204 {
 205 #ifdef __WXMSW__
 206 #if USE_GENERIC_TREECTRL
 207     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 208 #endif
 209     {
 210         UINT sbCode = SB_THUMBPOSITION;
 211         HWND vertScrollBar = 0;
 212         MSWDefWindowProc((WXUINT) WM_VSCROLL, MAKELONG(sbCode, posVert), (WXHWND) vertScrollBar);
 213     }
 214 #if USE_GENERIC_TREECTRL
 215     else
 216 #endif
 217 #endif
 218 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 219     {
 220         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
 221         win->Refresh();
 222         /* Doesn't work yet because scrolling is ignored by Scroll
 223         int xppu, yppu;
 224         wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 225         if (scrolledWindow)
 226         {
 227             scrolledWindow->GetScrollPixelsPerUnit(& xppu, & yppu);
 228             win->Scroll(-1, posVert*yppu);
 229         }
 230         */
 231     }
 232 #endif
 233 }
 234
 235 void wxRemotelyScrolledTreeCtrl::OnSize(wxSizeEvent& event)
 236 {
 237     HideVScrollbar();
 238     AdjustRemoteScrollbars();
 239     event.Skip();
 240 }
 241
 242 void wxRemotelyScrolledTreeCtrl::OnExpand(wxTreeEvent& event)
 243 {
 244     AdjustRemoteScrollbars();
 245     event.Skip();
 246
 247     // If we don't have this, we get some bits of lines still remaining
 248     if (event.GetEventType() == wxEVT_COMMAND_TREE_ITEM_COLLAPSED)
 249         Refresh();
 250
 251     // Pass on the event
 252     if (m_companionWindow)
 253         m_companionWindow->GetEventHandler()->ProcessEvent(event);
 254 }
 255
 256 void wxRemotelyScrolledTreeCtrl::OnPaint(wxPaintEvent& event)
 257 {
 258     wxPaintDC dc(this);
 259
 260     wxTreeCtrl::OnPaint(event);
 261
 262     if (! m_drawRowLines)
 263         return;
 264
 265     // Reset the device origin since it may have been set
 266     dc.SetDeviceOrigin(0, 0);
 267
 268     wxPen pen(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);
 269     dc.SetPen(pen);
 270     dc.SetBrush(* wxTRANSPARENT_BRUSH);
 271
 272     wxSize clientSize = GetClientSize();
 273     wxRect itemRect;
 274     int cy=0;
 275     wxTreeItemId h, lastH;
 276     for(h=GetFirstVisibleItem();h;h=GetNextVisible(h))
 277     {
 278         if (GetBoundingRect(h, itemRect))
 279         {
 280             cy = itemRect.GetTop();
 281             dc.DrawLine(0, cy, clientSize.x, cy);
 282             lastH = h;
 283         }
 284     }
 285     if (GetBoundingRect(lastH, itemRect))
 286     {
 287         cy = itemRect.GetBottom();
 288         dc.DrawLine(0, cy, clientSize.x, cy);
 289     }
 290 }
 291
 292
 293 // Adjust the containing wxScrolledWindow's scrollbars appropriately
 294 void wxRemotelyScrolledTreeCtrl::AdjustRemoteScrollbars()
 295 {
 296 #if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
 297     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 298     {
 299         // This is for the generic tree control.
 300         // It calls SetScrollbars which has been overridden
 301         // to adjust the parent scrolled window vertical
 302         // scrollbar.
 303         ((wxGenericTreeCtrl*) this)->AdjustMyScrollbars();
 304         return;
 305     }
 306     else
 307 #endif
 308     {
 309         // This is for the wxMSW tree control
 310         wxScrolledWindow* scrolledWindow = GetScrolledWindow();
 311         if (scrolledWindow)
 312         {
 313             wxRect itemRect;
 314             if (GetBoundingRect(GetRootItem(), itemRect))
 315             {
 316                 // Actually, the real height seems to be 1 less than reported
 317                 // (e.g. 16 instead of 16)
 318                 int itemHeight = itemRect.GetHeight() - 1;
 319
 320                 int w, h;
 321                 GetClientSize(&w, &h);
 322
 323                 wxRect rect(0, 0, 0, 0);
 324                 CalcTreeSize(rect);
 325
 326                 double f = ((double) (rect.GetHeight()) / (double) itemHeight)  ;
 327                 int treeViewHeight = (int) ceil(f);
 328
 329                 int scrollPixelsPerLine = itemHeight;
 330                 int scrollPos = - (itemRect.y / itemHeight);
 331
 332                 scrolledWindow->SetScrollbars(0, scrollPixelsPerLine, 0, treeViewHeight, 0, scrollPos);
 333
 334                 // Ensure that when a scrollbar becomes hidden or visible,
 335                 // the contained window sizes are right.
 336                 // Problem: this is called too early (?)
 337                 wxSizeEvent event(scrolledWindow->GetSize(), scrolledWindow->GetId());
 338                 scrolledWindow->GetEventHandler()->ProcessEvent(event);
 339             }
 340         }
 341     }
 342 }
 343
 344
 345 // Calculate the area that contains both rectangles
 346 static wxRect CombineRectangles(const wxRect& rect1, const wxRect& rect2)
 347 {
 348     wxRect rect;
 349
 350     int right1 = rect1.GetRight();
 351     int bottom1 = rect1.GetBottom();
 352     int right2 = rect2.GetRight();
 353     int bottom2 = rect2.GetBottom();
 354
 355     wxPoint topLeft = wxPoint(wxMin(rect1.x, rect2.x), wxMin(rect1.y, rect2.y));
 356     wxPoint bottomRight = wxPoint(wxMax(right1, right2), wxMax(bottom1, bottom2));
 357
 358     rect.x = topLeft.x; rect.y = topLeft.y;
 359     rect.SetRight(bottomRight.x);
 360     rect.SetBottom(bottomRight.y);
 361
 362     return rect;
 363 }
 364
 365
 366 // Calculate the tree overall size so we can set the scrollbar
 367 // correctly
 368 void wxRemotelyScrolledTreeCtrl::CalcTreeSize(wxRect& rect)
 369 {
 370     CalcTreeSize(GetRootItem(), rect);
 371 }
 372
 373 void wxRemotelyScrolledTreeCtrl::CalcTreeSize(const wxTreeItemId& id, wxRect& rect)
 374 {
 375     // More efficient implementation would be to find the last item (but how?)
 376     // Q: is the bounding rect relative to the top of the virtual tree workspace
 377     // or the top of the window? How would we convert?
 378     wxRect itemSize;
 379     if (GetBoundingRect(id, itemSize))
 380     {
 381         rect = CombineRectangles(rect, itemSize);
 382     }
 383
 384     long cookie;
 385     wxTreeItemId childId = GetFirstChild(id, cookie);
 386     while (childId != 0)
 387     {
 388         CalcTreeSize(childId, rect);
 389         childId = GetNextChild(childId, cookie);
 390     }
 391 }
 392
 393 // Find the scrolled window that contains this control
 394 wxScrolledWindow* wxRemotelyScrolledTreeCtrl::GetScrolledWindow() const
 395 {
 396     wxWindow* parent = wxWindow::GetParent();
 397     while (parent)
 398     {
 399         if (parent->IsKindOf(CLASSINFO(wxScrolledWindow)))
 400             return (wxScrolledWindow*) parent;
 401         parent = parent->GetParent();
 402     }
 403     return NULL;
 404 }
 405
 406 void wxRemotelyScrolledTreeCtrl::OnScroll(wxScrollWinEvent& event)
 407 {
 408     int orient = event.GetOrientation();
 409     if (orient == wxHORIZONTAL)
 410     {
 411         event.Skip();
 412         return;
 413     }
 414     wxScrolledWindow* scrollWin = GetScrolledWindow();
 415     if (!scrollWin)
 416         return;
 417
 418     int x, y;
 419     scrollWin->GetViewStart(& x, & y);
 420
 421     ScrollToLine(-1, y);
 422 }
 423
 424 /*
 425  * wxTreeCompanionWindow
 426  *
 427  * A window displaying values associated with tree control items.
 428  */
 429
 430 IMPLEMENT_CLASS(wxTreeCompanionWindow, wxWindow)
 431
 432 BEGIN_EVENT_TABLE(wxTreeCompanionWindow, wxWindow)
 433     EVT_PAINT(wxTreeCompanionWindow::OnPaint)
 434     EVT_SCROLLWIN(wxTreeCompanionWindow::OnScroll)
 435     EVT_TREE_ITEM_EXPANDED(-1, wxTreeCompanionWindow::OnExpand)
 436     EVT_TREE_ITEM_COLLAPSED(-1, wxTreeCompanionWindow::OnExpand)
 437 END_EVENT_TABLE()
 438
 439 wxTreeCompanionWindow::wxTreeCompanionWindow(wxWindow* parent, wxWindowID id,
 440       const wxPoint& pos,
 441       const wxSize& sz,
 442       long style):
 443     wxWindow(parent, id, pos, sz, style)
 444 {
 445     m_treeCtrl = NULL;
 446 }
 447
 448 void wxTreeCompanionWindow::DrawItem(wxDC& dc, wxTreeItemId id, const wxRect& rect)
 449 {
 450     // TEST CODE
 451 #if 1
 452     if (m_treeCtrl)
 453     {
 454         wxString text = m_treeCtrl->GetItemText(id);
 455         dc.SetTextForeground(* wxBLACK);
 456         dc.SetBackgroundMode(wxTRANSPARENT);
 457
 458         int textW, textH;
 459         dc.GetTextExtent(text, & textW, & textH);
 460
 461         int x = 5;
 462         int y = rect.GetY() + wxMax(0, (rect.GetHeight() - textH) / 2);
 463
 464         dc.DrawText(text, x, y);
 465     }
 466 #endif
 467 }
 468
 469 void wxTreeCompanionWindow::OnPaint(wxPaintEvent& event)
 470 {
 471     wxPaintDC dc(this);
 472
 473     if (!m_treeCtrl)
 474         return;
 475
 476         wxPen pen(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);
 477     dc.SetPen(pen);
 478     dc.SetBrush(* wxTRANSPARENT_BRUSH);
 479     wxFont font(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 480     dc.SetFont(font);
 481
 482     wxSize clientSize = GetClientSize();
 483     wxRect itemRect;
 484     int cy=0;
 485     wxTreeItemId h, lastH;
 486     for(h=m_treeCtrl->GetFirstVisibleItem();h;h=m_treeCtrl->GetNextVisible(h))
 487     {
 488         if (m_treeCtrl->GetBoundingRect(h, itemRect))
 489         {
 490             cy = itemRect.GetTop();
 491             wxRect drawItemRect(0, cy, clientSize.x, itemRect.GetHeight());
 492
 493             lastH = h;
 494
 495             // Draw the actual item
 496             DrawItem(dc, h, drawItemRect);
 497             dc.DrawLine(0, cy, clientSize.x, cy);
 498         }
 499     }
 500     if (lastH.IsOk() && m_treeCtrl->GetBoundingRect(lastH, itemRect))
 501     {
 502         cy = itemRect.GetBottom();
 503         dc.DrawLine(0, cy, clientSize.x, cy);
 504     }
 505 }
 506
 507 void wxTreeCompanionWindow::OnScroll(wxScrollWinEvent& event)
 508 {
 509     int orient = event.GetOrientation();
 510     if (orient == wxHORIZONTAL)
 511     {
 512         event.Skip();
 513         return;
 514     }
 515     if (!m_treeCtrl)
 516         return;
 517
 518     // TODO: scroll the window physically instead of just refreshing.
 519     Refresh(TRUE);
 520 }
 521
 522 void wxTreeCompanionWindow::OnExpand(wxTreeEvent& event)
 523 {
 524     // TODO: something more optimized than simply refresh the whole
 525     // window when the tree is expanded/collapsed. Tricky.
 526     Refresh();
 527 }
 528
 529 /*
 530  * wxThinSplitterWindow
 531  */
 532
 533 IMPLEMENT_CLASS(wxThinSplitterWindow, wxSplitterWindow)
 534
 535 BEGIN_EVENT_TABLE(wxThinSplitterWindow, wxSplitterWindow)
 536     EVT_SIZE(wxThinSplitterWindow::OnSize)
 537 END_EVENT_TABLE()
 538
 539 wxThinSplitterWindow::wxThinSplitterWindow(wxWindow* parent, wxWindowID id,
 540       const wxPoint& pos,
 541       const wxSize& sz,
 542       long style):
 543       wxSplitterWindow(parent, id, pos, sz, style)
 544 {
 545 }
 546
 547 void wxThinSplitterWindow::SizeWindows()
 548 {
 549     // The client size may have changed inbetween
 550     // the sizing of the first window and the sizing of
 551     // the second. So repeat SizeWindows.
 552     wxSplitterWindow::SizeWindows();
 553     wxSplitterWindow::SizeWindows();
 554 }
 555
 556 // Tests for x, y over sash
 557 bool wxThinSplitterWindow::SashHitTest(int x, int y, int tolerance)
 558 {
 559     return wxSplitterWindow::SashHitTest(x, y, 4);
 560 }
 561
 562 void wxThinSplitterWindow::DrawSash(wxDC& dc)
 563 {
 564     if ( m_sashPosition == 0 || !m_windowTwo)
 565         return;
 566     if (GetWindowStyle() & wxSP_NOSASH)
 567         return;
 568
 569     int w, h;
 570     GetClientSize(&w, &h);
 571
 572     if ( m_splitMode == wxSPLIT_VERTICAL )
 573     {
 574         dc.SetPen(* m_facePen);
 575         dc.SetBrush(* m_faceBrush);
 576         int h1 = h-1;
 577         int y1 = 0;
 578         if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 579             h1 += 1; // Not sure why this is necessary...
 580         if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 581         {
 582             y1 = 2; h1 -= 3;
 583         }
 584         dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 585     }
 586     else
 587     {
 588         dc.SetPen(* m_facePen);
 589         dc.SetBrush(* m_faceBrush);
 590         int w1 = w-1;
 591         int x1 = 0;
 592         if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 593             w1 ++;
 594         if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 595         {
 596             x1 = 2; w1 -= 3;
 597         }
 598         dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 599     }
 600
 601     dc.SetPen(wxNullPen);
 602     dc.SetBrush(wxNullBrush);
 603 }
 604
 605 void wxThinSplitterWindow::OnSize(wxSizeEvent& event)
 606 {
 607     wxSplitterWindow::OnSize(event);
 608 }
 609
 610 /*
 611  * wxSplitterScrolledWindow
 612  */
 613
 614 IMPLEMENT_CLASS(wxSplitterScrolledWindow, wxScrolledWindow)
 615
 616 BEGIN_EVENT_TABLE(wxSplitterScrolledWindow, wxScrolledWindow)
 617     EVT_SCROLLWIN(wxSplitterScrolledWindow::OnScroll)
 618     EVT_SIZE(wxSplitterScrolledWindow::OnSize)
 619 END_EVENT_TABLE()
 620
 621 wxSplitterScrolledWindow::wxSplitterScrolledWindow(wxWindow* parent, wxWindowID id,
 622       const wxPoint& pos,
 623       const wxSize& sz,
 624       long style):
 625       wxScrolledWindow(parent, id, pos, sz, style)
 626 {
 627 }
 628
 629 void wxSplitterScrolledWindow::OnSize(wxSizeEvent& event)
 630 {
 631     wxSize sz = GetClientSize();
 632     if (GetChildren().First())
 633     {
 634         ((wxWindow*) GetChildren().First()->Data())->SetSize(0, 0, sz.x, sz.y);
 635     }
 636 }
 637
 638 void wxSplitterScrolledWindow::OnScroll(wxScrollWinEvent& event)
 639 {
 640     // Ensure that events being propagated back up the window hierarchy
 641     // don't cause an infinite loop
 642     static bool inOnScroll = FALSE;
 643     if (inOnScroll)
 644     {
 645         event.Skip();
 646         return;
 647     }
 648     inOnScroll = TRUE;
 649
 650     int orient = event.GetOrientation();
 651
 652     int nScrollInc = CalcScrollInc(event);
 653     if (nScrollInc == 0)
 654     {
 655         inOnScroll = FALSE;
 656         return;
 657     }
 658
 659     if (orient == wxHORIZONTAL)
 660     {
 661         inOnScroll = FALSE;
 662         event.Skip();
 663         return;
 664 #if 0
 665         int newPos = m_xScrollPosition + nScrollInc;
 666         SetScrollPos(wxHORIZONTAL, newPos, TRUE );
 667 #endif
 668     }
 669     else
 670     {
 671         int newPos = m_yScrollPosition + nScrollInc;
 672         SetScrollPos(wxVERTICAL, newPos, TRUE );
 673     }
 674
 675     if (orient == wxHORIZONTAL)
 676     {
 677         m_xScrollPosition += nScrollInc;
 678     }
 679     else
 680     {
 681         m_yScrollPosition += nScrollInc;
 682     }
 683
 684     // Find targets in splitter window and send the event to them
 685     wxNode* node = GetChildren().First();
 686     while (node)
 687     {
 688         wxWindow* child = (wxWindow*) node->Data();
 689         if (child->IsKindOf(CLASSINFO(wxSplitterWindow)))
 690         {
 691             wxSplitterWindow* splitter = (wxSplitterWindow*) child;
 692             if (splitter->GetWindow1())
 693                 splitter->GetWindow1()->ProcessEvent(event);
 694             if (splitter->GetWindow2())
 695                 splitter->GetWindow2()->ProcessEvent(event);
 696             break;
 697         }
 698         node = node->Next();
 699     }
 700
 701 #ifdef __WXMAC__
 702     m_targetWindow->MacUpdateImmediately() ;
 703 #endif
 704
 705     inOnScroll = FALSE;
 706 }
 707