src/generic/sashwin.cpp

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