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 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/wx.h"
  25 #endif
  26
  27 #include <math.h>
  28 #include <stdlib.h>
  29
  30 #include "wx/string.h"
  31 #include "wx/splitter.h"
  32 #include "wx/dcscreen.h"
  33
  34 #if !USE_SHARED_LIBRARY
  35 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  36
  37 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  38     EVT_PAINT(wxSplitterWindow::OnPaint)
  39     EVT_SIZE(wxSplitterWindow::OnSize)
  40     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  41 END_EVENT_TABLE()
  42 #endif
  43
  44 wxSplitterWindow::wxSplitterWindow()
  45 {
  46     m_splitMode = wxSPLIT_VERTICAL;
  47     m_windowOne = (wxWindow *) NULL;
  48     m_windowTwo = (wxWindow *) NULL;
  49     m_dragMode = wxSPLIT_DRAG_NONE;
  50     m_oldX = 0;
  51     m_oldY = 0;
  52     m_firstX = 0;
  53     m_firstY = 0;
  54     m_sashSize = 7;
  55     m_borderSize = 2;
  56     m_sashPosition = 0;
  57     m_sashCursorWE = (wxCursor *) NULL;
  58     m_sashCursorNS = (wxCursor *) NULL;
  59     m_sashTrackerPen = (wxPen *) NULL;
  60     m_lightShadowPen = (wxPen *) NULL;
  61     m_mediumShadowPen = (wxPen *) NULL;
  62     m_darkShadowPen = (wxPen *) NULL;
  63     m_faceBrush = (wxBrush *) NULL;
  64     m_facePen = (wxPen *) NULL;
  65     m_hilightPen = (wxPen *) NULL;
  66     m_minimumPaneSize = 0;
  67 }
  68
  69 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  70                                    const wxPoint& pos,
  71                                    const wxSize& size,
  72                                    long style,
  73                                    const wxString& name)
  74                 : wxWindow(parent, id, pos, size, style, name)
  75 {
  76     m_splitMode = wxSPLIT_VERTICAL;
  77     m_windowOne = (wxWindow *) NULL;
  78     m_windowTwo = (wxWindow *) NULL;
  79     m_dragMode = wxSPLIT_DRAG_NONE;
  80     m_oldX = 0;
  81     m_oldY = 0;
  82     m_firstX = 0;
  83     m_firstY = 0;
  84     m_sashSize = 7;
  85     m_borderSize = 2;
  86     m_sashPosition = 0;
  87     m_minimumPaneSize = 0;
  88     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
  89     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
  90     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
  91     m_lightShadowPen = (wxPen *) NULL;
  92     m_mediumShadowPen = (wxPen *) NULL;
  93     m_darkShadowPen = (wxPen *) NULL;
  94     m_faceBrush = (wxBrush *) NULL;
  95     m_facePen = (wxPen *) NULL;
  96     m_hilightPen = (wxPen *) NULL;
  97
  98     if ( style & wxSP_3D )
  99     {
 100         m_borderSize = 2;
 101         m_sashSize = 7;
 102     }
 103     else if ( style & wxSP_BORDER )
 104     {
 105         m_borderSize = 1;
 106         m_sashSize = 3;
 107     }
 108     else
 109     {
 110         m_borderSize = 0;
 111         m_sashSize = 3;
 112     }
 113
 114     // Eventually, we'll respond to colour change messages
 115     InitColours();
 116
 117     // For debugging purposes, to see the background.
 118 //    SetBackground(wxBLUE_BRUSH);
 119 }
 120
 121 wxSplitterWindow::~wxSplitterWindow()
 122 {
 123     delete m_sashCursorWE;
 124     delete m_sashCursorNS;
 125     delete m_sashTrackerPen;
 126     delete m_lightShadowPen;
 127     delete m_darkShadowPen;
 128     delete m_mediumShadowPen;
 129     delete m_hilightPen;
 130     delete m_facePen;
 131     delete m_faceBrush;
 132 }
 133
 134 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 135 {
 136     wxPaintDC dc(this);
 137
 138     if ( m_borderSize > 0 )
 139         DrawBorders(dc);
 140     DrawSash(dc);
 141 }
 142
 143
 144 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 145 {
 146     long x = event.GetX();
 147     long y = event.GetY();
 148
 149     // reset the cursor
 150 #ifdef __WXMOTIF__
 151     SetCursor(* wxSTANDARD_CURSOR);
 152 #endif
 153 #ifdef __WXMSW__
 154     SetCursor(wxCursor());
 155 #endif
 156
 157     // under wxGTK the method above causes the mouse
 158     // to flicker so we set the standard cursor only
 159     // when leaving the window and when moving over
 160     // non-sash parts of the window. this should work
 161     // on the other platforms as well, but who knows.
 162 #ifdef __WXGTK__
 163     if (event.Leaving())
 164         SetCursor(* wxSTANDARD_CURSOR);
 165 #endif
 166
 167     if (event.LeftDown())
 168     {
 169         if ( SashHitTest(x, y) )
 170         {
 171             CaptureMouse();
 172
 173             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 174
 175             DrawSashTracker(x, y);
 176             m_oldX = x;
 177             m_oldY = y;
 178             return;
 179         }
 180     }
 181     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 182     {
 183         // We can stop dragging now and see what we've got.
 184         m_dragMode = wxSPLIT_DRAG_NONE;
 185         ReleaseMouse();
 186
 187         // Erase old tracker
 188         DrawSashTracker(m_oldX, m_oldY);
 189
 190         // Obtain window size. We are only interested in the dimension the sash
 191         // splits up
 192         int w, h;
 193         GetClientSize(&w, &h);
 194         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 195         int new_sash_position =
 196             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 197
 198         if ( !OnSashPositionChange(new_sash_position) )
 199             return;
 200
 201         if ( new_sash_position == 0 )
 202         {
 203             // We remove the first window from the view
 204             wxWindow *removedWindow = m_windowOne;
 205             m_windowOne = m_windowTwo;
 206             m_windowTwo = (wxWindow *) NULL;
 207             OnUnsplit(removedWindow);
 208             m_sashPosition = 0;
 209         }
 210         else if ( new_sash_position == window_size )
 211         {
 212             // We remove the second window from the view
 213             wxWindow *removedWindow = m_windowTwo;
 214             m_windowTwo = (wxWindow *) NULL;
 215             OnUnsplit(removedWindow);
 216             m_sashPosition = 0;
 217         }
 218         else
 219         {
 220             m_sashPosition = new_sash_position;
 221         }
 222         SizeWindows();
 223     }  // left up && dragging
 224     else if (event.Moving() && !event.Dragging())
 225     {
 226         // Just change the cursor if required
 227         if ( SashHitTest(x, y) )
 228         {
 229                 if ( m_splitMode == wxSPLIT_VERTICAL )
 230                 {
 231                     SetCursor(*m_sashCursorWE);
 232                 }
 233                 else
 234                 {
 235                     SetCursor(*m_sashCursorNS);
 236                 }
 237         }
 238 #ifdef __WXGTK__
 239         else
 240         {
 241             // where else do we unset the cursor?
 242             SetCursor(* wxSTANDARD_CURSOR);
 243         }
 244 #endif
 245     }
 246     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 247     {
 248         // Erase old tracker
 249         DrawSashTracker(m_oldX, m_oldY);
 250
 251         // Draw new one
 252         DrawSashTracker(x, y);
 253
 254         m_oldX = x;
 255         m_oldY = y;
 256     }
 257     else if ( event.LeftDClick() )
 258     {
 259         OnDoubleClickSash(x, y);
 260     }
 261 }
 262
 263 void wxSplitterWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 264 {
 265     int cw, ch;
 266     GetClientSize( &cw, &ch );
 267     if ( m_windowTwo )
 268     {
 269         if ( m_splitMode == wxSPLIT_VERTICAL )
 270         {
 271             if ( m_sashPosition >= (cw - 5) )
 272                 m_sashPosition = wxMax(10, cw - 40);
 273         }
 274         if ( m_splitMode == wxSPLIT_HORIZONTAL )
 275         {
 276             if ( m_sashPosition >= (ch - 5) )
 277                 m_sashPosition = wxMax(10, ch - 40);
 278         }
 279     }
 280     SizeWindows();
 281 }
 282
 283 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 284 {
 285     if ( m_windowTwo == NULL || m_sashPosition == 0)
 286         return FALSE; // No sash
 287
 288     if ( m_splitMode == wxSPLIT_VERTICAL )
 289     {
 290         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 291             return TRUE;
 292         else
 293             return FALSE;
 294     }
 295     else
 296     {
 297         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 298             return TRUE;
 299         else
 300             return FALSE;
 301     }
 302
 303     return FALSE;
 304 }
 305
 306 // Draw 3D effect borders
 307 void wxSplitterWindow::DrawBorders(wxDC& dc)
 308 {
 309     int w, h;
 310     GetClientSize(&w, &h);
 311
 312     if ( GetWindowStyleFlag() & wxSP_3D )
 313     {
 314         dc.SetPen(*m_mediumShadowPen);
 315         dc.DrawLine(0, 0, w-1, 0);
 316         dc.DrawLine(0, 0, 0, h - 1);
 317
 318         dc.SetPen(*m_darkShadowPen);
 319         dc.DrawLine(1, 1, w-2, 1);
 320         dc.DrawLine(1, 1, 1, h-2);
 321
 322         dc.SetPen(*m_hilightPen);
 323         dc.DrawLine(0, h-1, w-1, h-1);
 324         dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
 325                                      /// Anyway, h is required for MSW.
 326
 327         dc.SetPen(*m_lightShadowPen);
 328         dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
 329         dc.DrawLine(1, h-2, w-1, h-2);     // Bottom
 330     }
 331     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 332     {
 333         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 334         dc.SetPen(*wxBLACK_PEN);
 335         dc.DrawRectangle(0, 0, w-1, h-1);
 336     }
 337
 338     dc.SetPen(wxNullPen);
 339     dc.SetBrush(wxNullBrush);
 340 }
 341
 342 // Draw the sash
 343 void wxSplitterWindow::DrawSash(wxDC& dc)
 344 {
 345     if ( m_sashPosition == 0 || !m_windowTwo)
 346         return;
 347
 348     int w, h;
 349     GetClientSize(&w, &h);
 350
 351     if ( GetWindowStyleFlag() & wxSP_3D )
 352     {
 353         if ( m_splitMode == wxSPLIT_VERTICAL )
 354         {
 355             dc.SetPen(*m_facePen);
 356             dc.SetBrush(*m_faceBrush);
 357             dc.DrawRectangle(m_sashPosition + 2, 0, m_sashSize - 4, h);
 358
 359             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 360
 361             dc.SetPen(*m_lightShadowPen);
 362             dc.DrawLine(m_sashPosition, 1, m_sashPosition, h-2);
 363
 364             dc.SetPen(*m_hilightPen);
 365             dc.DrawLine(m_sashPosition+1, 0, m_sashPosition+1, h);
 366
 367             dc.SetPen(*m_mediumShadowPen);
 368             dc.DrawLine(m_sashPosition+m_sashSize-2, 1, m_sashPosition+m_sashSize-2, h-1);
 369
 370             dc.SetPen(*m_darkShadowPen);
 371             dc.DrawLine(m_sashPosition+m_sashSize-1, 2, m_sashPosition+m_sashSize-1, h-2);
 372         }
 373         else
 374         {
 375             dc.SetPen(*m_facePen);
 376             dc.SetBrush(*m_faceBrush);
 377             dc.DrawRectangle(0, m_sashPosition + 2, w, m_sashSize - 4);
 378
 379             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 380
 381             dc.SetPen(*m_lightShadowPen);
 382             dc.DrawLine(1, m_sashPosition, w-2, m_sashPosition);
 383
 384             dc.SetPen(*m_hilightPen);
 385             dc.DrawLine(0, m_sashPosition+1, w, m_sashPosition+1);
 386
 387             dc.SetPen(*m_mediumShadowPen);
 388             dc.DrawLine(1, m_sashPosition+m_sashSize-2, w-1, m_sashPosition+m_sashSize-2);
 389
 390             dc.SetPen(*m_darkShadowPen);
 391             dc.DrawLine(2, m_sashPosition+m_sashSize-1, w-2, m_sashPosition+m_sashSize-1);
 392         }
 393     }
 394     else
 395     {
 396         if ( m_splitMode == wxSPLIT_VERTICAL )
 397         {
 398             dc.SetPen(*wxBLACK_PEN);
 399             dc.SetBrush(*wxBLACK_BRUSH);
 400             int h1 = h-1;
 401             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 402                 h1 += 1; // Not sure why this is necessary...
 403             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 404         }
 405         else
 406         {
 407             dc.SetPen(*wxBLACK_PEN);
 408             dc.SetBrush(*wxBLACK_BRUSH);
 409             int w1 = w-1;
 410             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 411                 w1 ++;
 412
 413             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 414         }
 415
 416     }
 417
 418     dc.SetPen(wxNullPen);
 419     dc.SetBrush(wxNullBrush);
 420 }
 421
 422 // Draw the sash tracker (for whilst moving the sash)
 423 void wxSplitterWindow::DrawSashTracker(int x, int y)
 424 {
 425     int w, h;
 426     GetClientSize(&w, &h);
 427
 428     wxScreenDC screenDC;
 429     int x1, y1;
 430     int x2, y2;
 431
 432     if ( m_splitMode == wxSPLIT_VERTICAL )
 433     {
 434         x1 = x; y1 = 2;
 435         x2 = x; y2 = h-2;
 436
 437         if ( x1 > w )
 438         {
 439             x1 = w; x2 = w;
 440         }
 441         else if ( x1 < 0 )
 442         {
 443             x1 = 0; x2 = 0;
 444         }
 445     }
 446     else
 447     {
 448         x1 = 2; y1 = y;
 449         x2 = w-2; y2 = y;
 450
 451         if ( y1 > h )
 452         {
 453             y1 = h;
 454             y2 = h;
 455         }
 456         else if ( y1 < 0 )
 457         {
 458             y1 = 0;
 459             y2 = 0;
 460         }
 461     }
 462
 463     ClientToScreen(&x1, &y1);
 464     ClientToScreen(&x2, &y2);
 465
 466     screenDC.SetLogicalFunction(wxXOR);
 467     screenDC.SetPen(*m_sashTrackerPen);
 468     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 469
 470     screenDC.DrawLine(x1, y1, x2, y2);
 471
 472     screenDC.SetLogicalFunction(wxCOPY);
 473
 474     screenDC.SetPen(wxNullPen);
 475     screenDC.SetBrush(wxNullBrush);
 476 }
 477
 478 // Position and size subwindows.
 479 // Note that the border size applies to each subwindow, not
 480 // including the edges next to the sash.
 481 void wxSplitterWindow::SizeWindows()
 482 {
 483     int w, h;
 484     GetClientSize(&w, &h);
 485
 486     if ( m_windowOne && !m_windowTwo )
 487     {
 488         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 489
 490         if (m_windowOne->GetAutoLayout())
 491             m_windowOne->Layout();
 492     }
 493     else if ( m_windowOne && m_windowTwo )
 494     {
 495         if (m_splitMode == wxSPLIT_VERTICAL)
 496         {
 497             int x1 = m_borderSize;
 498             int y1 = m_borderSize;
 499             int w1 = m_sashPosition - m_borderSize;
 500             int h1 = h - 2*m_borderSize;
 501
 502             int x2 = m_sashPosition + m_sashSize;
 503             int y2 = m_borderSize;
 504             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 505             int h2 = h - 2*m_borderSize;
 506
 507             m_windowOne->SetSize(x1, y1, w1, h1);
 508             m_windowTwo->SetSize(x2, y2, w2, h2);
 509
 510             if (m_windowOne->GetAutoLayout())
 511                 m_windowOne->Layout();
 512             if (m_windowTwo->GetAutoLayout())
 513                 m_windowTwo->Layout();
 514         }
 515         else
 516         {
 517             m_windowOne->SetSize(m_borderSize, m_borderSize,
 518                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 519             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 520                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 521
 522             if (m_windowOne->GetAutoLayout())
 523                 m_windowOne->Layout();
 524             if (m_windowTwo->GetAutoLayout())
 525                 m_windowTwo->Layout();
 526         }
 527     }
 528     wxClientDC dc(this);
 529     DrawBorders(dc);
 530     DrawSash(dc);
 531 }
 532
 533 // Set pane for unsplit window
 534 void wxSplitterWindow::Initialize(wxWindow *window)
 535 {
 536     m_windowOne = window;
 537     m_windowTwo = (wxWindow *) NULL;
 538     m_sashPosition = 0;
 539 }
 540
 541 // Associates the given window with window 2, drawing the appropriate sash
 542 // and changing the split mode.
 543 // Does nothing and returns FALSE if the window is already split.
 544 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 545 {
 546     if ( IsSplit() )
 547         return FALSE;
 548
 549     int w, h;
 550     GetClientSize(&w, &h);
 551
 552     m_splitMode = wxSPLIT_VERTICAL;
 553     m_windowOne = window1;
 554     m_windowTwo = window2;
 555     if ( sashPosition > 0 )
 556         m_sashPosition = sashPosition;
 557     else if ( sashPosition < 0 )
 558         m_sashPosition = w - sashPosition;
 559     else    // default
 560         m_sashPosition = w/2;
 561
 562     SizeWindows();
 563
 564     return TRUE;
 565 }
 566
 567 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 568 {
 569     if ( IsSplit() )
 570         return FALSE;
 571
 572     int w, h;
 573     GetClientSize(&w, &h);
 574
 575     m_splitMode = wxSPLIT_HORIZONTAL;
 576     m_windowOne = window1;
 577     m_windowTwo = window2;
 578     if ( sashPosition > 0 )
 579         m_sashPosition = sashPosition;
 580     else if ( sashPosition < 0 )
 581         m_sashPosition = h - sashPosition;
 582     else    // default
 583         m_sashPosition = h/2;
 584
 585     SizeWindows();
 586
 587     return TRUE;
 588 }
 589
 590
 591 // Remove the specified (or second) window from the view
 592 // Doesn't actually delete the window.
 593 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 594 {
 595     if ( ! IsSplit() )
 596         return FALSE;
 597
 598     wxWindow *win = NULL;
 599     if ( toRemove == NULL || toRemove == m_windowTwo)
 600     {
 601         win = m_windowTwo ;
 602         m_windowTwo = (wxWindow *) NULL;
 603     }
 604     else if ( toRemove == m_windowOne )
 605     {
 606         win = m_windowOne ;
 607         m_windowOne = m_windowTwo;
 608         m_windowTwo = (wxWindow *) NULL;
 609     }
 610     else
 611     {
 612         wxFAIL_MSG(_T("splitter: attempt to remove a non-existent window"));
 613
 614         return FALSE;
 615     }
 616
 617     OnUnsplit(win);
 618     m_sashPosition = 0;
 619     SizeWindows();
 620
 621     return TRUE;
 622 }
 623
 624 // Replace a window with another one
 625 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 626 {
 627     wxCHECK_MSG( winOld, FALSE, _T("use one of Split() functions instead") );
 628     wxCHECK_MSG( winNew, FALSE, _T("use Unsplit() functions instead") );
 629
 630     if ( winOld == m_windowTwo )
 631     {
 632         m_windowTwo = winNew;
 633     }
 634     else if ( winOld == m_windowOne )
 635     {
 636         m_windowOne = winNew;
 637     }
 638     else
 639     {
 640         wxFAIL_MSG(_T("splitter: attempt to replace a non-existent window"));
 641
 642         return FALSE;
 643     }
 644
 645     SizeWindows();
 646
 647     return TRUE;
 648 }
 649
 650 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 651 {
 652     m_sashPosition = position;
 653
 654     if ( redraw )
 655     {
 656         SizeWindows();
 657     }
 658 }
 659
 660 bool wxSplitterWindow::OnSashPositionChange(int& newSashPosition)
 661 {
 662     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 663     const int UNSPLIT_THRESHOLD = 4;
 664
 665     if (newSashPosition <= UNSPLIT_THRESHOLD)   // threshold top / left check
 666     {
 667         newSashPosition = 0;
 668         return TRUE;
 669     }
 670
 671     // Obtain relevant window dimension for bottom / right threshold check
 672     int w, h;
 673     GetClientSize(&w, &h);
 674     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 675
 676     if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 677     {
 678         newSashPosition = window_size;
 679         return TRUE;
 680     }
 681
 682     // If resultant pane would be too small, enlarge it.
 683
 684     // Check upper / left pane
 685     if ( newSashPosition < m_minimumPaneSize )
 686         newSashPosition = m_minimumPaneSize;   // NB: don't return just yet
 687
 688     // Check lower / right pane (check even if sash was just adjusted)
 689     if ( newSashPosition > window_size - m_minimumPaneSize )
 690         newSashPosition = window_size - m_minimumPaneSize;
 691
 692     // If the result is out of bounds it means minimum size is too big, so
 693     // split window in half as best compromise.
 694     if (newSashPosition < 0 || newSashPosition > window_size)
 695         newSashPosition = window_size / 2;
 696     return TRUE;
 697 }
 698
 699 // Called when the sash is double-clicked.
 700 // The default behaviour is to remove the sash if the
 701 // minimum pane size is zero.
 702 void wxSplitterWindow::OnDoubleClickSash(int WXUNUSED(x), int WXUNUSED(y) )
 703 {
 704     if ( GetMinimumPaneSize() == 0 )
 705     {
 706         Unsplit();
 707     }
 708 }
 709
 710 // Initialize colours
 711 void wxSplitterWindow::InitColours()
 712 {
 713     wxDELETE( m_facePen );
 714     wxDELETE( m_faceBrush );
 715     wxDELETE( m_mediumShadowPen );
 716     wxDELETE( m_darkShadowPen );
 717     wxDELETE( m_lightShadowPen );
 718     wxDELETE( m_hilightPen );
 719
 720     // Shadow colours
 721 #if defined(__WIN95__)
 722     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 723     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 724     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 725
 726     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 727     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 728
 729     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 730     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 731
 732     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 733     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 734
 735     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 736     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 737 #else // !Win32
 738     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 739     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 740     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 741     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 742     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 743     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 744 #endif // Win32/!Win32
 745 }
 746