src/generic/splitter.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        splitter.cpp
   3 // Purpose:     wxSplitterWindow implementation
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:       wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "splitter.h"
  14 // #pragma interface
  15 #endif
  16
  17 // For compilers that support precompilation, includes "wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __BORLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WX_PRECOMP
  25 #include "wx/wx.h"
  26 #endif
  27
  28 #include <math.h>
  29 #include <stdlib.h>
  30
  31 #include "wx/string.h"
  32 #include "wx/splitter.h"
  33 #include "wx/dcscreen.h"
  34
  35 #if !USE_SHARED_LIBRARY
  36 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  37
  38 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  39     EVT_PAINT(wxSplitterWindow::OnPaint)
  40     EVT_SIZE(wxSplitterWindow::OnSize)
  41     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  42 END_EVENT_TABLE()
  43 #endif
  44
  45 wxSplitterWindow::wxSplitterWindow()
  46 {
  47     m_splitMode = wxSPLIT_VERTICAL;
  48     m_windowOne = (wxWindow *) NULL;
  49     m_windowTwo = (wxWindow *) NULL;
  50     m_dragMode = wxSPLIT_DRAG_NONE;
  51     m_oldX = 0;
  52     m_oldY = 0;
  53     m_firstX = 0;
  54     m_firstY = 0;
  55     m_sashSize = 7;
  56     m_borderSize = 2;
  57     m_sashPosition = 0;
  58     m_sashCursorWE = (wxCursor *) NULL;
  59     m_sashCursorNS = (wxCursor *) NULL;
  60     m_sashTrackerPen = (wxPen *) NULL;
  61     m_lightShadowPen = (wxPen *) NULL;
  62     m_mediumShadowPen = (wxPen *) NULL;
  63     m_darkShadowPen = (wxPen *) NULL;
  64     m_faceBrush = (wxBrush *) NULL;
  65     m_facePen = (wxPen *) NULL;
  66     m_hilightPen = (wxPen *) NULL;
  67     m_minimumPaneSize = 0;
  68 }
  69
  70 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  71                                    const wxPoint& pos,
  72                                    const wxSize& size,
  73                                    long style,
  74                                    const wxString& name)
  75                 : wxWindow(parent, id, pos, size, style, name)
  76 {
  77     m_splitMode = wxSPLIT_VERTICAL;
  78     m_windowOne = (wxWindow *) NULL;
  79     m_windowTwo = (wxWindow *) NULL;
  80     m_dragMode = wxSPLIT_DRAG_NONE;
  81     m_oldX = 0;
  82     m_oldY = 0;
  83     m_firstX = 0;
  84     m_firstY = 0;
  85     m_sashSize = 7;
  86     m_borderSize = 2;
  87     m_sashPosition = 0;
  88     m_minimumPaneSize = 0;
  89     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
  90     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
  91     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
  92     m_lightShadowPen = (wxPen *) NULL;
  93     m_mediumShadowPen = (wxPen *) NULL;
  94     m_darkShadowPen = (wxPen *) NULL;
  95     m_faceBrush = (wxBrush *) NULL;
  96     m_facePen = (wxPen *) NULL;
  97     m_hilightPen = (wxPen *) NULL;
  98
  99     if ( style & wxSP_3D )
 100     {
 101         m_borderSize = 2;
 102         m_sashSize = 7;
 103     }
 104     else if ( style & wxSP_BORDER )
 105     {
 106         m_borderSize = 1;
 107         m_sashSize = 3;
 108     }
 109     else
 110     {
 111         m_borderSize = 0;
 112         m_sashSize = 3;
 113     }
 114
 115     // Eventually, we'll respond to colour change messages
 116     InitColours();
 117
 118     // For debugging purposes, to see the background.
 119 //    SetBackground(wxBLUE_BRUSH);
 120 }
 121
 122 wxSplitterWindow::~wxSplitterWindow()
 123 {
 124     delete m_sashCursorWE;
 125     delete m_sashCursorNS;
 126     delete m_sashTrackerPen;
 127     delete m_lightShadowPen;
 128     delete m_darkShadowPen;
 129     delete m_mediumShadowPen;
 130     delete m_hilightPen;
 131     delete m_facePen;
 132     delete m_faceBrush;
 133 }
 134
 135 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 136 {
 137     wxPaintDC dc(this);
 138
 139     if ( m_borderSize > 0 )
 140         DrawBorders(dc);
 141     DrawSash(dc);
 142 }
 143
 144 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 145 {
 146     long x, y;
 147     event.Position(&x, &y);
 148
 149     if (event.LeftDown())
 150     {
 151         if ( SashHitTest(x, y) )
 152         {
 153             CaptureMouse();
 154
 155             // Required for X to specify that
 156             // that we wish to draw on top of all windows
 157             // - and we optimise by specifying the area
 158             // for creating the overlap window.
 159             wxScreenDC::StartDrawingOnTop(this);
 160
 161             // We don't say we're dragging yet; we leave that
 162             // decision for the Dragging() branch, to ensure
 163             // the user has dragged a little bit.
 164             m_dragMode = wxSPLIT_DRAG_LEFT_DOWN;
 165             m_firstX = x;
 166             m_firstY = y;
 167         }
 168     }
 169     else if ( event.LeftUp() && m_dragMode == wxSPLIT_DRAG_LEFT_DOWN )
 170     {
 171         // Wasn't a proper drag
 172         ReleaseMouse();
 173         wxScreenDC::EndDrawingOnTop();
 174         m_dragMode = wxSPLIT_DRAG_NONE;
 175
 176         SetCursor(*wxSTANDARD_CURSOR);
 177     }
 178     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 179     {
 180         // We can stop dragging now and see what we've got.
 181         m_dragMode = wxSPLIT_DRAG_NONE;
 182         ReleaseMouse();
 183         // Erase old tracker
 184         DrawSashTracker(m_oldX, m_oldY);
 185
 186         // End drawing on top (frees the window used for drawing
 187         // over the screen)
 188         wxScreenDC::EndDrawingOnTop();
 189
 190         int w, h;
 191         GetClientSize(&w, &h);
 192         if ( m_splitMode == wxSPLIT_VERTICAL )
 193         {
 194             if ( !OnSashPositionChange(x) )
 195                 return;
 196
 197             if ( x <= 4 )
 198             {
 199                 // We remove the first window from the view
 200                 wxWindow *removedWindow = m_windowOne;
 201                 m_windowOne = m_windowTwo;
 202                 m_windowTwo = (wxWindow *) NULL;
 203
 204                 OnUnsplit(removedWindow);
 205                 m_sashPosition = 0;
 206             }
 207             else if ( x >= (w - 4) )
 208             {
 209                 // We remove the second window from the view
 210                 wxWindow *removedWindow = m_windowTwo;
 211                 m_windowTwo = (wxWindow *) NULL;
 212                 OnUnsplit(removedWindow);
 213                 m_sashPosition = 0;
 214             }
 215             else
 216             {
 217                 m_sashPosition = x;
 218             }
 219         }
 220         else
 221         {
 222             if ( !OnSashPositionChange(y) )
 223                 return;
 224
 225             if ( y <= 4 )
 226             {
 227                 // We remove the first window from the view
 228                 wxWindow *removedWindow = m_windowOne;
 229                 m_windowOne = m_windowTwo;
 230                 m_windowTwo = (wxWindow *) NULL;
 231
 232                 OnUnsplit(removedWindow);
 233                 m_sashPosition = 0;
 234             }
 235             else if ( y >= (h - 4) )
 236             {
 237                 // We remove the second window from the view
 238                 wxWindow *removedWindow = m_windowTwo;
 239                 m_windowTwo = (wxWindow *) NULL;
 240                 OnUnsplit(removedWindow);
 241                 m_sashPosition = 0;
 242             }
 243             else
 244             {
 245                 m_sashPosition = y;
 246             }
 247         }
 248         SizeWindows();
 249     }
 250     else if (event.Moving() && !event.Dragging())
 251     {
 252         // Just change the cursor if required
 253         if ( SashHitTest(x, y) )
 254         {
 255                 if ( m_splitMode == wxSPLIT_VERTICAL )
 256                 {
 257                     SetCursor(*m_sashCursorWE);
 258                 }
 259                 else
 260                 {
 261                     SetCursor(*m_sashCursorNS);
 262                 }
 263         }
 264         else
 265         {
 266             SetCursor(*wxSTANDARD_CURSOR);
 267         }
 268     }
 269     else if ( (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING)) ||
 270               (event.Dragging() && SashHitTest(x, y, 4)) )
 271     {
 272          if ( m_splitMode == wxSPLIT_VERTICAL )
 273          {
 274             SetCursor(*m_sashCursorWE);
 275          }
 276          else
 277          {
 278             SetCursor(*m_sashCursorNS);
 279          }
 280
 281         // Detect that this is really a drag: we've moved more than 1 pixel either way
 282         if ((m_dragMode == wxSPLIT_DRAG_LEFT_DOWN) &&
 283 //                (abs((int)x - m_firstX) > 1 || abs((int)y - m_firstY) > 1) )
 284                 (abs((int)x - m_firstX) > 0 || abs((int)y - m_firstY) > 1) )
 285         {
 286             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 287             DrawSashTracker(x, y);
 288         }
 289         else
 290         {
 291           if ( m_dragMode == wxSPLIT_DRAG_DRAGGING )
 292           {
 293             // Erase old tracker
 294             DrawSashTracker(m_oldX, m_oldY);
 295
 296             // Draw new one
 297             DrawSashTracker(x, y);
 298           }
 299         }
 300         m_oldX = x;
 301         m_oldY = y;
 302     }
 303     else if ( event.LeftDClick() )
 304     {
 305         OnDoubleClickSash(x, y);
 306     }
 307     else
 308     {
 309     }
 310 }
 311
 312 void wxSplitterWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 313 {
 314     int cw, ch;
 315     GetClientSize( &cw, &ch );
 316     if ( m_windowTwo )
 317     {
 318         if ( m_splitMode == wxSPLIT_VERTICAL )
 319         {
 320             if ( m_sashPosition >= (cw - 5) )
 321                 m_sashPosition = wxMax(10, cw - 40);
 322         }
 323         if ( m_splitMode == wxSPLIT_HORIZONTAL )
 324         {
 325             if ( m_sashPosition >= (ch - 5) )
 326                 m_sashPosition = wxMax(10, ch - 40);
 327         }
 328     }
 329     SizeWindows();
 330 }
 331
 332 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 333 {
 334     if ( m_windowTwo == NULL || m_sashPosition == 0)
 335         return FALSE; // No sash
 336
 337     if ( m_splitMode == wxSPLIT_VERTICAL )
 338     {
 339         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 340             return TRUE;
 341         else
 342             return FALSE;
 343     }
 344     else
 345     {
 346         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 347             return TRUE;
 348         else
 349             return FALSE;
 350     }
 351
 352     return FALSE;
 353 }
 354
 355 // Draw 3D effect borders
 356 void wxSplitterWindow::DrawBorders(wxDC& dc)
 357 {
 358     int w, h;
 359     GetClientSize(&w, &h);
 360
 361     if ( GetWindowStyleFlag() & wxSP_3D )
 362     {
 363         dc.SetPen(*m_mediumShadowPen);
 364         dc.DrawLine(0, 0, w-1, 0);
 365         dc.DrawLine(0, 0, 0, h - 1);
 366
 367         dc.SetPen(*m_darkShadowPen);
 368         dc.DrawLine(1, 1, w-2, 1);
 369         dc.DrawLine(1, 1, 1, h-2);
 370
 371         dc.SetPen(*m_hilightPen);
 372         dc.DrawLine(0, h-1, w-1, h-1);
 373         dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
 374                                      /// Anyway, h is required for MSW.
 375
 376         dc.SetPen(*m_lightShadowPen);
 377         dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
 378         dc.DrawLine(1, h-2, w-1, h-2);     // Bottom
 379     }
 380     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 381     {
 382         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 383         dc.SetPen(*wxBLACK_PEN);
 384         dc.DrawRectangle(0, 0, w-1, h-1);
 385     }
 386
 387     dc.SetPen(wxNullPen);
 388     dc.SetBrush(wxNullBrush);
 389 }
 390
 391 // Draw the sash
 392 void wxSplitterWindow::DrawSash(wxDC& dc)
 393 {
 394     if ( m_sashPosition == 0 || !m_windowTwo)
 395         return;
 396
 397     int w, h;
 398     GetClientSize(&w, &h);
 399
 400     if ( GetWindowStyleFlag() & wxSP_3D )
 401     {
 402         if ( m_splitMode == wxSPLIT_VERTICAL )
 403         {
 404             dc.SetPen(*m_facePen);
 405             dc.SetBrush(*m_faceBrush);
 406             dc.DrawRectangle(m_sashPosition + 2, 0, m_sashSize - 4, h);
 407
 408             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 409
 410             dc.SetPen(*m_lightShadowPen);
 411             dc.DrawLine(m_sashPosition, 1, m_sashPosition, h-2);
 412
 413             dc.SetPen(*m_hilightPen);
 414             dc.DrawLine(m_sashPosition+1, 0, m_sashPosition+1, h);
 415
 416             dc.SetPen(*m_mediumShadowPen);
 417             dc.DrawLine(m_sashPosition+m_sashSize-2, 1, m_sashPosition+m_sashSize-2, h-1);
 418
 419             dc.SetPen(*m_darkShadowPen);
 420             dc.DrawLine(m_sashPosition+m_sashSize-1, 2, m_sashPosition+m_sashSize-1, h-2);
 421         }
 422         else
 423         {
 424             dc.SetPen(*m_facePen);
 425             dc.SetBrush(*m_faceBrush);
 426             dc.DrawRectangle(0, m_sashPosition + 2, w, m_sashSize - 4);
 427
 428             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 429
 430             dc.SetPen(*m_lightShadowPen);
 431             dc.DrawLine(1, m_sashPosition, w-2, m_sashPosition);
 432
 433             dc.SetPen(*m_hilightPen);
 434             dc.DrawLine(0, m_sashPosition+1, w, m_sashPosition+1);
 435
 436             dc.SetPen(*m_mediumShadowPen);
 437             dc.DrawLine(1, m_sashPosition+m_sashSize-2, w-1, m_sashPosition+m_sashSize-2);
 438
 439             dc.SetPen(*m_darkShadowPen);
 440             dc.DrawLine(2, m_sashPosition+m_sashSize-1, w-2, m_sashPosition+m_sashSize-1);
 441         }
 442     }
 443     else
 444     {
 445         if ( m_splitMode == wxSPLIT_VERTICAL )
 446         {
 447             dc.SetPen(*wxBLACK_PEN);
 448             dc.SetBrush(*wxBLACK_BRUSH);
 449             int h1 = h-1;
 450             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 451                 h1 += 1; // Not sure why this is necessary...
 452             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 453         }
 454         else
 455         {
 456             dc.SetPen(*wxBLACK_PEN);
 457             dc.SetBrush(*wxBLACK_BRUSH);
 458             int w1 = w-1;
 459             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 460                 w1 ++;
 461
 462             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 463         }
 464
 465     }
 466
 467     dc.SetPen(wxNullPen);
 468     dc.SetBrush(wxNullBrush);
 469 }
 470
 471 // Draw the sash tracker (for whilst moving the sash)
 472 void wxSplitterWindow::DrawSashTracker(int x, int y)
 473 {
 474     int w, h;
 475     GetClientSize(&w, &h);
 476
 477     wxScreenDC screenDC;
 478     int x1, y1;
 479     int x2, y2;
 480
 481     if ( m_splitMode == wxSPLIT_VERTICAL )
 482     {
 483         x1 = x; y1 = 2;
 484         x2 = x; y2 = h-2;
 485
 486         if ( x1 > w )
 487         {
 488             x1 = w; x2 = w;
 489         }
 490         else if ( x1 < 0 )
 491         {
 492             x1 = 0; x2 = 0;
 493         }
 494     }
 495     else
 496     {
 497         x1 = 2; y1 = y;
 498         x2 = w-2; y2 = y;
 499
 500         if ( y1 > h )
 501         {
 502             y1 = h;
 503             y2 = h;
 504         }
 505         else if ( y1 < 0 )
 506         {
 507             y1 = 0;
 508             y2 = 0;
 509         }
 510     }
 511
 512     ClientToScreen(&x1, &y1);
 513     ClientToScreen(&x2, &y2);
 514
 515     screenDC.SetLogicalFunction(wxXOR);
 516     screenDC.SetPen(*m_sashTrackerPen);
 517     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 518
 519     screenDC.DrawLine(x1, y1, x2, y2);
 520
 521     screenDC.SetLogicalFunction(wxCOPY);
 522
 523     screenDC.SetPen(wxNullPen);
 524     screenDC.SetBrush(wxNullBrush);
 525 }
 526
 527 // Position and size subwindows.
 528 // Note that the border size applies to each subwindow, not
 529 // including the edges next to the sash.
 530 void wxSplitterWindow::SizeWindows()
 531 {
 532     int w, h;
 533     GetClientSize(&w, &h);
 534
 535     if ( m_windowOne && !m_windowTwo )
 536     {
 537         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 538     }
 539     else if ( m_windowOne && m_windowTwo )
 540     {
 541         if (m_splitMode == wxSPLIT_VERTICAL)
 542         {
 543             int x1 = m_borderSize;
 544             int y1 = m_borderSize;
 545             int w1 = m_sashPosition - m_borderSize;
 546             int h1 = h - 2*m_borderSize;
 547
 548             int x2 = m_sashPosition + m_sashSize;
 549             int y2 = m_borderSize;
 550             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 551             int h2 = h - 2*m_borderSize;
 552
 553             m_windowOne->SetSize(x1, y1, w1, h1);
 554             m_windowTwo->SetSize(x2, y2, w2, h2);
 555         }
 556         else
 557         {
 558             m_windowOne->SetSize(m_borderSize, m_borderSize,
 559                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 560             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 561                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 562         }
 563     }
 564     wxClientDC dc(this);
 565     DrawBorders(dc);
 566     DrawSash(dc);
 567 }
 568
 569 // Set pane for unsplit window
 570 void wxSplitterWindow::Initialize(wxWindow *window)
 571 {
 572     m_windowOne = window;
 573     m_windowTwo = (wxWindow *) NULL;
 574     m_sashPosition = 0;
 575 }
 576
 577 // Associates the given window with window 2, drawing the appropriate sash
 578 // and changing the split mode.
 579 // Does nothing and returns FALSE if the window is already split.
 580 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 581 {
 582     if ( IsSplit() )
 583         return FALSE;
 584
 585     int w, h;
 586     GetClientSize(&w, &h);
 587
 588     m_splitMode = wxSPLIT_VERTICAL;
 589     m_windowOne = window1;
 590     m_windowTwo = window2;
 591     if ( sashPosition > 0 )
 592         m_sashPosition = sashPosition;
 593     else if ( sashPosition < 0 )
 594         m_sashPosition = w - sashPosition;
 595     else    // default
 596         m_sashPosition = w/2;
 597
 598     SizeWindows();
 599
 600     return TRUE;
 601 }
 602
 603 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 604 {
 605     if ( IsSplit() )
 606         return FALSE;
 607
 608     int w, h;
 609     GetClientSize(&w, &h);
 610
 611     m_splitMode = wxSPLIT_HORIZONTAL;
 612     m_windowOne = window1;
 613     m_windowTwo = window2;
 614     if ( sashPosition > 0 )
 615         m_sashPosition = sashPosition;
 616     else if ( sashPosition < 0 )
 617         m_sashPosition = h - sashPosition;
 618     else    // default
 619         m_sashPosition = h/2;
 620
 621     SizeWindows();
 622
 623     return TRUE;
 624 }
 625
 626
 627 // Remove the specified (or second) window from the view
 628 // Doesn't actually delete the window.
 629 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 630 {
 631     if ( ! IsSplit() )
 632         return FALSE;
 633
 634     if ( toRemove == NULL || toRemove == m_windowTwo)
 635     {
 636         wxWindow *win = m_windowTwo ;
 637         m_windowTwo = (wxWindow *) NULL;
 638         m_sashPosition = 0;
 639         OnUnsplit(win);
 640         SizeWindows();
 641     }
 642     else if ( toRemove == m_windowOne )
 643     {
 644         wxWindow *win = m_windowOne ;
 645         m_windowOne = m_windowTwo;
 646         m_windowTwo = (wxWindow *) NULL;
 647         m_sashPosition = 0;
 648         OnUnsplit(win);
 649         SizeWindows();
 650     }
 651     else
 652         return FALSE;
 653
 654     return TRUE;
 655 }
 656
 657 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 658 {
 659     m_sashPosition = position;
 660
 661     if ( redraw )
 662     {
 663         SizeWindows();
 664     }
 665 }
 666
 667 bool wxSplitterWindow::OnSashPositionChange(int newSashPosition)
 668 {
 669   // is the left/upper pane too small?
 670   if ( newSashPosition < m_minimumPaneSize )
 671     return NULL;
 672
 673   // is the right/lower pane too small?
 674   int w, h;
 675   GetClientSize(&w, &h);
 676
 677   if ( m_splitMode == wxSPLIT_VERTICAL )
 678   {
 679     if ( w - newSashPosition < m_minimumPaneSize )
 680       return FALSE;
 681   }
 682   else // m_splitMode = wxSPLIT_HORIZONTAL
 683   {
 684     if ( h - newSashPosition < m_minimumPaneSize )
 685       return FALSE;
 686   }
 687
 688   // it's ok to move sash
 689   return TRUE;
 690 }
 691
 692 // Called when the sash is double-clicked.
 693 // The default behaviour is to remove the sash if the
 694 // minimum pane size is zero.
 695 void wxSplitterWindow::OnDoubleClickSash(int WXUNUSED(x), int WXUNUSED(y) )
 696 {
 697     if ( GetMinimumPaneSize() == 0 )
 698     {
 699         Unsplit();
 700     }
 701 }
 702
 703 // Initialize colours
 704 void wxSplitterWindow::InitColours()
 705 {
 706     wxDELETE( m_facePen );
 707     wxDELETE( m_faceBrush );
 708     wxDELETE( m_mediumShadowPen );
 709     wxDELETE( m_darkShadowPen );
 710     wxDELETE( m_lightShadowPen );
 711     wxDELETE( m_hilightPen );
 712
 713     // Shadow colours
 714 #if defined(__WIN95__)
 715     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 716     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 717     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 718
 719     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 720     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 721
 722     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 723     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 724
 725     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 726     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 727
 728     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 729     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 730 #else // !Win32
 731     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 732     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 733     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 734     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 735     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 736     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 737 #endif // Win32/!Win32
 738 }
 739