src/generic/sashwin.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sashwin.cpp
   3 // Purpose:     wxSashWindow implementation. A sash window has an optional
   4 //              sash on each edge, allowing it to be dragged. An event
   5 //              is generated when the sash is released.
   6 // Author:      Julian Smart
   7 // Modified by:
   8 // Created:     01/02/97
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Julian Smart
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  15 #pragma implementation "sashwin.h"
  16 #endif
  17
  18 // For compilers that support precompilation, includes "wx.h".
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22 #pragma hdrstop
  23 #endif
  24
  25 #if wxUSE_SASH
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/dialog.h"
  29     #include "wx/frame.h"
  30     #include "wx/settings.h"
  31 #endif
  32
  33 #include <math.h>
  34 #include <stdlib.h>
  35
  36 #include "wx/dcscreen.h"
  37 #include "wx/sashwin.h"
  38 #include "wx/laywin.h"
  39
  40 DEFINE_EVENT_TYPE(wxEVT_SASH_DRAGGED)
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxSashWindow, wxWindow)
  43 IMPLEMENT_DYNAMIC_CLASS(wxSashEvent, wxCommandEvent)
  44
  45 BEGIN_EVENT_TABLE(wxSashWindow, wxWindow)
  46     EVT_PAINT(wxSashWindow::OnPaint)
  47     EVT_SIZE(wxSashWindow::OnSize)
  48     EVT_MOUSE_EVENTS(wxSashWindow::OnMouseEvent)
  49 #if defined( __WXMSW__ ) || defined( __WXMAC__)
  50     EVT_SET_CURSOR(wxSashWindow::OnSetCursor)
  51 #endif // wxMSW
  52
  53 END_EVENT_TABLE()
  54
  55 bool wxSashWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
  56     const wxSize& size, long style, const wxString& name)
  57 {
  58     return wxWindow::Create(parent, id, pos, size, style, name);
  59 }
  60
  61 wxSashWindow::~wxSashWindow()
  62 {
  63     delete m_sashCursorWE;
  64     delete m_sashCursorNS;
  65 }
  66
  67 void wxSashWindow::Init()
  68 {
  69     m_draggingEdge = wxSASH_NONE;
  70     m_dragMode = wxSASH_DRAG_NONE;
  71     m_oldX = 0;
  72     m_oldY = 0;
  73     m_firstX = 0;
  74     m_firstY = 0;
  75     m_borderSize = 3;
  76     m_extraBorderSize = 0;
  77     m_minimumPaneSizeX = 0;
  78     m_minimumPaneSizeY = 0;
  79     m_maximumPaneSizeX = 10000;
  80     m_maximumPaneSizeY = 10000;
  81     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
  82     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
  83     m_mouseCaptured = false;
  84     m_currentCursor = NULL;
  85
  86     // Eventually, we'll respond to colour change messages
  87     InitColours();
  88 }
  89
  90 void wxSashWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
  91 {
  92     wxPaintDC dc(this);
  93
  94     DrawBorders(dc);
  95     DrawSashes(dc);
  96 }
  97
  98 void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
  99 {
 100     wxCoord x, y;
 101     event.GetPosition(&x, &y);
 102
 103     wxSashEdgePosition sashHit = SashHitTest(x, y);
 104
 105     if (event.LeftDown())
 106     {
 107         CaptureMouse();
 108         m_mouseCaptured = true;
 109
 110         if ( sashHit != wxSASH_NONE )
 111         {
 112             // Required for X to specify that
 113             // that we wish to draw on top of all windows
 114             // - and we optimise by specifying the area
 115             // for creating the overlap window.
 116             // Find the first frame or dialog and use this to specify
 117             // the area to draw on.
 118             wxWindow* parent = this;
 119
 120             while (parent && !parent->IsKindOf(CLASSINFO(wxDialog)) &&
 121                              !parent->IsKindOf(CLASSINFO(wxFrame)))
 122               parent = parent->GetParent();
 123
 124             wxScreenDC::StartDrawingOnTop(parent);
 125
 126             // We don't say we're dragging yet; we leave that
 127             // decision for the Dragging() branch, to ensure
 128             // the user has dragged a little bit.
 129             m_dragMode = wxSASH_DRAG_LEFT_DOWN;
 130             m_draggingEdge = sashHit;
 131             m_firstX = x;
 132             m_firstY = y;
 133
 134             if ( (sashHit == wxSASH_LEFT) || (sashHit == wxSASH_RIGHT) )
 135             {
 136                 if (m_currentCursor != m_sashCursorWE)
 137                 {
 138                     SetCursor(*m_sashCursorWE);
 139                 }
 140                 m_currentCursor = m_sashCursorWE;
 141             }
 142             else
 143             {
 144                 if (m_currentCursor != m_sashCursorNS)
 145                 {
 146                     SetCursor(*m_sashCursorNS);
 147                 }
 148                 m_currentCursor = m_sashCursorNS;
 149             }
 150         }
 151     }
 152     else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
 153     {
 154         // Wasn't a proper drag
 155         if (m_mouseCaptured)
 156             ReleaseMouse();
 157         m_mouseCaptured = false;
 158
 159         wxScreenDC::EndDrawingOnTop();
 160         m_dragMode = wxSASH_DRAG_NONE;
 161         m_draggingEdge = wxSASH_NONE;
 162     }
 163     else if (event.LeftUp() && m_dragMode == wxSASH_DRAG_DRAGGING)
 164     {
 165         // We can stop dragging now and see what we've got.
 166         m_dragMode = wxSASH_DRAG_NONE;
 167         if (m_mouseCaptured)
 168             ReleaseMouse();
 169         m_mouseCaptured = false;
 170
 171         // Erase old tracker
 172         DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
 173
 174         // End drawing on top (frees the window used for drawing
 175         // over the screen)
 176         wxScreenDC::EndDrawingOnTop();
 177
 178         int w, h;
 179         GetSize(&w, &h);
 180         int xp, yp;
 181         GetPosition(&xp, &yp);
 182
 183         wxSashEdgePosition edge = m_draggingEdge;
 184         m_draggingEdge = wxSASH_NONE;
 185
 186         wxRect dragRect;
 187         wxSashDragStatus status = wxSASH_STATUS_OK;
 188
 189         // the new height and width of the window - if -1, it didn't change
 190         int newHeight = wxDefaultCoord,
 191             newWidth = wxDefaultCoord;
 192
 193         // NB: x and y may be negative and they're relative to the sash window
 194         //     upper left corner, while xp and yp are expressed in the parent
 195         //     window system of coordinates, so adjust them! After this
 196         //     adjustment, all coordinates are relative to the parent window.
 197         y += yp;
 198         x += xp;
 199
 200         switch (edge)
 201         {
 202             case wxSASH_TOP:
 203                 if ( y > yp + h )
 204                 {
 205                     // top sash shouldn't get below the bottom one
 206                     status = wxSASH_STATUS_OUT_OF_RANGE;
 207                 }
 208                 else
 209                 {
 210                     newHeight = h - (y - yp);
 211                 }
 212                 break;
 213
 214             case wxSASH_BOTTOM:
 215                 if ( y < yp )
 216                 {
 217                     // bottom sash shouldn't get above the top one
 218                     status = wxSASH_STATUS_OUT_OF_RANGE;
 219                 }
 220                 else
 221                 {
 222                     newHeight = y - yp;
 223                 }
 224                 break;
 225
 226             case wxSASH_LEFT:
 227                 if ( x > xp + w )
 228                 {
 229                     // left sash shouldn't get beyond the right one
 230                     status = wxSASH_STATUS_OUT_OF_RANGE;
 231                 }
 232                 else
 233                 {
 234                     newWidth = w - (x - xp);
 235                 }
 236                 break;
 237
 238             case wxSASH_RIGHT:
 239                 if ( x < xp )
 240                 {
 241                     // and the right sash, finally, shouldn't be beyond the
 242                     // left one
 243                     status = wxSASH_STATUS_OUT_OF_RANGE;
 244                 }
 245                 else
 246                 {
 247                     newWidth = x - xp;
 248                 }
 249                 break;
 250
 251             case wxSASH_NONE:
 252                 // can this happen at all?
 253                 break;
 254         }
 255
 256         if ( newHeight == wxDefaultCoord )
 257         {
 258             // didn't change
 259             newHeight = h;
 260         }
 261         else
 262         {
 263             // make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
 264             newHeight = wxMax(newHeight, m_minimumPaneSizeY);
 265             newHeight = wxMin(newHeight, m_maximumPaneSizeY);
 266         }
 267
 268         if ( newWidth == wxDefaultCoord )
 269         {
 270             // didn't change
 271             newWidth = w;
 272         }
 273         else
 274         {
 275             // make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
 276             newWidth = wxMax(newWidth, m_minimumPaneSizeX);
 277             newWidth = wxMin(newWidth, m_maximumPaneSizeX);
 278         }
 279
 280         dragRect = wxRect(x, y, newWidth, newHeight);
 281
 282         wxSashEvent event(GetId(), edge);
 283         event.SetEventObject(this);
 284         event.SetDragStatus(status);
 285         event.SetDragRect(dragRect);
 286         GetEventHandler()->ProcessEvent(event);
 287     }
 288     else if ( event.LeftUp() )
 289     {
 290         if (m_mouseCaptured)
 291            ReleaseMouse();
 292         m_mouseCaptured = false;
 293     }
 294     else if (event.Moving() && !event.Dragging())
 295     {
 296         // Just change the cursor if required
 297         if ( sashHit != wxSASH_NONE )
 298         {
 299             if ( (sashHit == wxSASH_LEFT) || (sashHit == wxSASH_RIGHT) )
 300             {
 301                 if (m_currentCursor != m_sashCursorWE)
 302                 {
 303                     SetCursor(*m_sashCursorWE);
 304                 }
 305                 m_currentCursor = m_sashCursorWE;
 306             }
 307             else
 308             {
 309                 if (m_currentCursor != m_sashCursorNS)
 310                 {
 311                     SetCursor(*m_sashCursorNS);
 312                 }
 313                 m_currentCursor = m_sashCursorNS;
 314             }
 315         }
 316         else
 317         {
 318             SetCursor(wxNullCursor);
 319             m_currentCursor = NULL;
 320         }
 321     }
 322     else if ( event.Dragging() &&
 323               ((m_dragMode == wxSASH_DRAG_DRAGGING) ||
 324                (m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
 325     {
 326         if ( (m_draggingEdge == wxSASH_LEFT) || (m_draggingEdge == wxSASH_RIGHT) )
 327         {
 328             if (m_currentCursor != m_sashCursorWE)
 329             {
 330                 SetCursor(*m_sashCursorWE);
 331             }
 332             m_currentCursor = m_sashCursorWE;
 333         }
 334         else
 335         {
 336             if (m_currentCursor != m_sashCursorNS)
 337             {
 338                 SetCursor(*m_sashCursorNS);
 339             }
 340             m_currentCursor = m_sashCursorNS;
 341         }
 342
 343         if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
 344         {
 345             m_dragMode = wxSASH_DRAG_DRAGGING;
 346             DrawSashTracker(m_draggingEdge, x, y);
 347         }
 348         else
 349         {
 350             if ( m_dragMode == wxSASH_DRAG_DRAGGING )
 351             {
 352                 // Erase old tracker
 353                 DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
 354
 355                 // Draw new one
 356                 DrawSashTracker(m_draggingEdge, x, y);
 357             }
 358         }
 359         m_oldX = x;
 360         m_oldY = y;
 361     }
 362     else if ( event.LeftDClick() )
 363     {
 364         // Nothing
 365     }
 366     else
 367     {
 368     }
 369 }
 370
 371 void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 372 {
 373     SizeWindows();
 374 }
 375
 376 wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
 377 {
 378     int cx, cy;
 379     GetClientSize(& cx, & cy);
 380
 381     int i;
 382     for (i = 0; i < 4; i++)
 383     {
 384         wxSashEdge& edge = m_sashes[i];
 385         wxSashEdgePosition position = (wxSashEdgePosition) i ;
 386
 387         if (edge.m_show)
 388         {
 389             switch (position)
 390             {
 391                 case wxSASH_TOP:
 392                 {
 393                     if (y >= 0 && y <= GetEdgeMargin(position))
 394                         return wxSASH_TOP;
 395                     break;
 396                 }
 397                 case wxSASH_RIGHT:
 398                 {
 399                     if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
 400                         return wxSASH_RIGHT;
 401                     break;
 402                 }
 403                 case wxSASH_BOTTOM:
 404                 {
 405                     if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
 406                         return wxSASH_BOTTOM;
 407                     break;
 408                 }
 409                 case wxSASH_LEFT:
 410                 {
 411                     if ((x <= GetEdgeMargin(position)) && (x >= 0))
 412                         return wxSASH_LEFT;
 413                     break;
 414                 }
 415                 case wxSASH_NONE:
 416                 {
 417                     break;
 418                 }
 419             }
 420         }
 421     }
 422     return wxSASH_NONE;
 423 }
 424
 425 // Draw 3D effect borders
 426 void wxSashWindow::DrawBorders(wxDC& dc)
 427 {
 428     int w, h;
 429     GetClientSize(&w, &h);
 430
 431     wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
 432     wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
 433     wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
 434     wxPen hilightPen(m_hilightColour, 1, wxSOLID);
 435
 436     if ( GetWindowStyleFlag() & wxSW_3DBORDER )
 437     {
 438         dc.SetPen(mediumShadowPen);
 439         dc.DrawLine(0, 0, w-1, 0);
 440         dc.DrawLine(0, 0, 0, h - 1);
 441
 442         dc.SetPen(darkShadowPen);
 443         dc.DrawLine(1, 1, w-2, 1);
 444         dc.DrawLine(1, 1, 1, h-2);
 445
 446         dc.SetPen(hilightPen);
 447         dc.DrawLine(0, h-1, w-1, h-1);
 448         dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
 449                                      /// Anyway, h is required for MSW.
 450
 451         dc.SetPen(lightShadowPen);
 452         dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
 453         dc.DrawLine(1, h-2, w-1, h-2);     // Bottom
 454     }
 455     else if ( GetWindowStyleFlag() & wxSW_BORDER )
 456     {
 457         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 458         dc.SetPen(*wxBLACK_PEN);
 459         dc.DrawRectangle(0, 0, w-1, h-1);
 460     }
 461
 462     dc.SetPen(wxNullPen);
 463     dc.SetBrush(wxNullBrush);
 464 }
 465
 466 void wxSashWindow::DrawSashes(wxDC& dc)
 467 {
 468     int i;
 469     for (i = 0; i < 4; i++)
 470         if (m_sashes[i].m_show)
 471             DrawSash((wxSashEdgePosition) i, dc);
 472 }
 473
 474 // Draw the sash
 475 void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
 476 {
 477     int w, h;
 478     GetClientSize(&w, &h);
 479
 480     wxPen facePen(m_faceColour, 1, wxSOLID);
 481     wxBrush faceBrush(m_faceColour, wxSOLID);
 482     wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
 483     wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
 484     wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
 485     wxPen hilightPen(m_hilightColour, 1, wxSOLID);
 486     wxColour blackClr(0, 0, 0);
 487     wxColour whiteClr(255, 255, 255);
 488     wxPen blackPen(blackClr, 1, wxSOLID);
 489     wxPen whitePen(whiteClr, 1, wxSOLID);
 490
 491     if ( edge == wxSASH_LEFT || edge == wxSASH_RIGHT )
 492     {
 493         int sashPosition = (edge == wxSASH_LEFT) ? 0 : ( w - GetEdgeMargin(edge) );
 494
 495         dc.SetPen(facePen);
 496         dc.SetBrush(faceBrush);
 497         dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);
 498
 499         if (GetWindowStyleFlag() & wxSW_3DSASH)
 500         {
 501             if (edge == wxSASH_LEFT)
 502             {
 503                 // Draw a dark grey line on the left to indicate that the
 504                 // sash is raised
 505                 dc.SetPen(mediumShadowPen);
 506                 dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
 507             }
 508             else
 509             {
 510                 // Draw a highlight line on the right to indicate that the
 511                 // sash is raised
 512                 dc.SetPen(hilightPen);
 513                 dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
 514             }
 515         }
 516     }
 517     else // top or bottom
 518     {
 519         int sashPosition = (edge == wxSASH_TOP) ? 0 : ( h - GetEdgeMargin(edge) );
 520
 521         dc.SetPen(facePen);
 522         dc.SetBrush(faceBrush);
 523         dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));
 524
 525         if (GetWindowStyleFlag() & wxSW_3DSASH)
 526         {
 527             if (edge == wxSASH_BOTTOM)
 528             {
 529                 // Draw a highlight line on the bottom to indicate that the
 530                 // sash is raised
 531                 dc.SetPen(hilightPen);
 532                 dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
 533             }
 534             else
 535             {
 536                 // Draw a drak grey line on the top to indicate that the
 537                 // sash is raised
 538                 dc.SetPen(mediumShadowPen);
 539                 dc.DrawLine(1, GetEdgeMargin(edge), w-1, GetEdgeMargin(edge));
 540             }
 541         }
 542     }
 543
 544     dc.SetPen(wxNullPen);
 545     dc.SetBrush(wxNullBrush);
 546 }
 547
 548 // Draw the sash tracker (for whilst moving the sash)
 549 void wxSashWindow::DrawSashTracker(wxSashEdgePosition edge, int x, int y)
 550 {
 551     int w, h;
 552     GetClientSize(&w, &h);
 553
 554     wxScreenDC screenDC;
 555     int x1, y1;
 556     int x2, y2;
 557
 558     if ( edge == wxSASH_LEFT || edge == wxSASH_RIGHT )
 559     {
 560         x1 = x; y1 = 2;
 561         x2 = x; y2 = h-2;
 562
 563         if ( (edge == wxSASH_LEFT) && (x1 > w) )
 564         {
 565             x1 = w; x2 = w;
 566         }
 567         else if ( (edge == wxSASH_RIGHT) && (x1 < 0) )
 568         {
 569             x1 = 0; x2 = 0;
 570         }
 571     }
 572     else
 573     {
 574         x1 = 2; y1 = y;
 575         x2 = w-2; y2 = y;
 576
 577         if ( (edge == wxSASH_TOP) && (y1 > h) )
 578         {
 579             y1 = h;
 580             y2 = h;
 581         }
 582         else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
 583         {
 584             y1 = 0;
 585             y2 = 0;
 586         }
 587     }
 588
 589     ClientToScreen(&x1, &y1);
 590     ClientToScreen(&x2, &y2);
 591
 592     wxPen sashTrackerPen(*wxBLACK, 2, wxSOLID);
 593
 594     screenDC.SetLogicalFunction(wxINVERT);
 595     screenDC.SetPen(sashTrackerPen);
 596     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 597
 598     screenDC.DrawLine(x1, y1, x2, y2);
 599
 600     screenDC.SetLogicalFunction(wxCOPY);
 601
 602     screenDC.SetPen(wxNullPen);
 603     screenDC.SetBrush(wxNullBrush);
 604 }
 605
 606 // Position and size subwindows.
 607 // Note that the border size applies to each subwindow, not
 608 // including the edges next to the sash.
 609 void wxSashWindow::SizeWindows()
 610 {
 611     int cw, ch;
 612     GetClientSize(&cw, &ch);
 613
 614     if (GetChildren().GetCount() == 1)
 615     {
 616         wxWindow* child = GetChildren().GetFirst()->GetData();
 617
 618         int x = 0;
 619         int y = 0;
 620         int width = cw;
 621         int height = ch;
 622
 623         // Top
 624         if (m_sashes[0].m_show)
 625         {
 626             y = m_borderSize;
 627             height -= m_borderSize;
 628         }
 629         y += m_extraBorderSize;
 630
 631         // Left
 632         if (m_sashes[3].m_show)
 633         {
 634             x = m_borderSize;
 635             width -= m_borderSize;
 636         }
 637         x += m_extraBorderSize;
 638
 639         // Right
 640         if (m_sashes[1].m_show)
 641         {
 642             width -= m_borderSize;
 643         }
 644         width -= 2*m_extraBorderSize;
 645
 646         // Bottom
 647         if (m_sashes[2].m_show)
 648         {
 649             height -= m_borderSize;
 650         }
 651         height -= 2*m_extraBorderSize;
 652
 653         child->SetSize(x, y, width, height);
 654     }
 655     else if (GetChildren().GetCount() > 1)
 656     {
 657         // Perhaps multiple children are themselves sash windows.
 658         // TODO: this doesn't really work because the subwindows sizes/positions
 659         // must be set to leave a gap for the parent's sash (hit-test and decorations).
 660         // Perhaps we can allow for this within LayoutWindow, testing whether the parent
 661         // is a sash window, and if so, allowing some space for the edges.
 662         wxLayoutAlgorithm layout;
 663         layout.LayoutWindow(this);
 664     }
 665
 666     wxClientDC dc(this);
 667     DrawBorders(dc);
 668     DrawSashes(dc);
 669 }
 670
 671 // Initialize colours
 672 void wxSashWindow::InitColours()
 673 {
 674     // Shadow colours
 675     m_faceColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 676     m_mediumShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW);
 677     m_darkShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW);
 678     m_lightShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT);
 679     m_hilightColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT);
 680 }
 681
 682 void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
 683 {
 684      m_sashes[edge].m_show = sash;
 685      if (sash)
 686         m_sashes[edge].m_margin = m_borderSize;
 687      else
 688         m_sashes[edge].m_margin = 0;
 689 }
 690
 691 #if defined( __WXMSW__ ) || defined( __WXMAC__)
 692
 693 // this is currently called (and needed) under MSW only...
 694 void wxSashWindow::OnSetCursor(wxSetCursorEvent& event)
 695 {
 696     // if we don't do it, the resizing cursor might be set for child window:
 697     // and like this we explicitly say that our cursor should not be used for
 698     // children windows which overlap us
 699
 700     if ( SashHitTest(event.GetX(), event.GetY()) != wxSASH_NONE)
 701     {
 702         // default processing is ok
 703         event.Skip();
 704     }
 705     //else: do nothing, in particular, don't call Skip()
 706 }
 707
 708 #endif // wxMSW
 709
 710 #endif // wxUSE_SASH