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/window.h"
  25     #include "wx/dialog.h"
  26     #include "wx/frame.h"
  27 #endif
  28
  29 #include <stdlib.h>
  30
  31 #include "wx/string.h"
  32 #include "wx/splitter.h"
  33 #include "wx/dcscreen.h"
  34 #include "wx/settings.h"
  35 #include "wx/log.h"
  36 #include "wx/utils.h"
  37
  38 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED)
  39 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING)
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_UNSPLIT)
  42
  43 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  44 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
  45
  46 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  47     EVT_PAINT(wxSplitterWindow::OnPaint)
  48     EVT_SIZE(wxSplitterWindow::OnSize)
  49     EVT_IDLE(wxSplitterWindow::OnIdle)
  50     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  51
  52     EVT_SET_CURSOR(wxSplitterWindow::OnSetCursor)
  53
  54     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  55     // NB: we borrow OnSashPosChanged for purposes of
  56     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  57     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  58     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  59     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  60
  61     WX_EVENT_TABLE_CONTROL_CONTAINER(wxSplitterWindow)
  62 END_EVENT_TABLE()
  63
  64 WX_DELEGATE_TO_CONTROL_CONTAINER(wxSplitterWindow);
  65
  66 bool wxSplitterWindow::Create(wxWindow *parent, wxWindowID id,
  67                                    const wxPoint& pos,
  68                                    const wxSize& size,
  69                                    long style,
  70                                    const wxString& name)
  71 {
  72     // allow TABbing from one window to the other
  73     style |= wxTAB_TRAVERSAL;
  74
  75     if (!wxWindow::Create(parent, id, pos, size, style, name))
  76         return FALSE;
  77
  78     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  79
  80     if ( style & wxSP_3DSASH )
  81         m_sashSize = 7;
  82     else
  83         m_sashSize = 3;
  84
  85     if ( style & wxSP_3DBORDER )
  86         m_borderSize = 2;
  87     else if ( style & wxSP_BORDER )
  88         m_borderSize = 1;
  89     else
  90         m_borderSize = 0;
  91
  92 #ifdef __WXMAC__
  93     int major,minor;
  94     wxGetOsVersion( &major, &minor );
  95     if (major >= 10)
  96         m_windowStyle |= wxSP_SASH_AQUA;
  97 #endif
  98
  99     return TRUE;
 100 }
 101
 102 void wxSplitterWindow::Init()
 103 {
 104     m_container.SetContainerWindow(this);
 105
 106     m_splitMode = wxSPLIT_VERTICAL;
 107     m_permitUnsplitAlways = TRUE;
 108     m_windowOne = (wxWindow *) NULL;
 109     m_windowTwo = (wxWindow *) NULL;
 110     m_dragMode = wxSPLIT_DRAG_NONE;
 111     m_oldX = 0;
 112     m_oldY = 0;
 113     m_firstX = 0;
 114     m_firstY = 0;
 115     m_sashSize = 7;
 116     m_borderSize = 2;
 117     m_sashPosition = 0;
 118     m_minimumPaneSize = 0;
 119     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 120     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 121     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 122     m_lightShadowPen = (wxPen *) NULL;
 123     m_mediumShadowPen = (wxPen *) NULL;
 124     m_darkShadowPen = (wxPen *) NULL;
 125     m_faceBrush = (wxBrush *) NULL;
 126     m_facePen = (wxPen *) NULL;
 127     m_hilightPen = (wxPen *) NULL;
 128
 129     m_borderSize = 0;
 130     m_sashSize = 3;
 131
 132     InitColours();
 133
 134     m_needUpdating = FALSE;
 135 }
 136
 137 wxSplitterWindow::~wxSplitterWindow()
 138 {
 139     delete m_sashCursorWE;
 140     delete m_sashCursorNS;
 141     delete m_sashTrackerPen;
 142     delete m_lightShadowPen;
 143     delete m_darkShadowPen;
 144     delete m_mediumShadowPen;
 145     delete m_hilightPen;
 146     delete m_facePen;
 147     delete m_faceBrush;
 148 }
 149
 150 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 151 {
 152     wxPaintDC dc(this);
 153
 154     if ( m_borderSize > 0 )
 155         DrawBorders(dc);
 156     DrawSash(dc);
 157 }
 158
 159 void wxSplitterWindow::OnIdle(wxIdleEvent& event)
 160 {
 161     if (m_needUpdating)
 162         SizeWindows();
 163
 164     event.Skip();
 165 }
 166
 167 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 168 {
 169     wxCoord x = (wxCoord)event.GetX(),
 170             y = (wxCoord)event.GetY();
 171
 172     // reset the cursor
 173 #ifdef __WXMOTIF__
 174     SetCursor(* wxSTANDARD_CURSOR);
 175 #endif
 176 #ifdef __WXMSW__
 177     SetCursor(wxCursor());
 178 #endif
 179
 180     if (GetWindowStyle() & wxSP_NOSASH)
 181         return;
 182
 183     if (event.LeftDown())
 184     {
 185         if ( SashHitTest(x, y) )
 186         {
 187             CaptureMouse();
 188
 189             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 190
 191             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 192             {
 193                 DrawSashTracker(x, y);
 194             }
 195
 196             m_oldX = x;
 197             m_oldY = y;
 198
 199             if ( m_splitMode == wxSPLIT_VERTICAL )
 200             {
 201                 SetCursor(*m_sashCursorWE);
 202             }
 203             else
 204             {
 205                 SetCursor(*m_sashCursorNS);
 206             }
 207             return;
 208         }
 209     }
 210     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 211     {
 212         // We can stop dragging now and see what we've got.
 213         m_dragMode = wxSPLIT_DRAG_NONE;
 214         ReleaseMouse();
 215
 216         // Erase old tracker
 217         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 218         {
 219             DrawSashTracker(m_oldX, m_oldY);
 220         }
 221
 222         // Obtain window size. We are only interested in the dimension the sash
 223         // splits up
 224         int w, h;
 225         GetClientSize(&w, &h);
 226         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 227         int new_sash_position =
 228             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 229
 230         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 231                                       this);
 232         eventSplitter.m_data.pos = new_sash_position;
 233         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 234         {
 235             new_sash_position = eventSplitter.GetSashPosition();
 236             if ( new_sash_position == -1 )
 237             {
 238                 // change not allowed
 239                 return;
 240             }
 241         }
 242
 243         if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 244         {
 245             // Deal with possible unsplit scenarios
 246             if ( new_sash_position == 0 )
 247             {
 248                 // We remove the first window from the view
 249                 wxWindow *removedWindow = m_windowOne;
 250                 m_windowOne = m_windowTwo;
 251                 m_windowTwo = (wxWindow *) NULL;
 252                 SendUnsplitEvent(removedWindow);
 253                 m_sashPosition = 0;
 254             }
 255             else if ( new_sash_position == window_size )
 256             {
 257                 // We remove the second window from the view
 258                 wxWindow *removedWindow = m_windowTwo;
 259                 m_windowTwo = (wxWindow *) NULL;
 260                 SendUnsplitEvent(removedWindow);
 261                 m_sashPosition = 0;
 262             }
 263             else
 264             {
 265                 m_sashPosition = new_sash_position;
 266             }
 267         }
 268         else
 269         {
 270             m_sashPosition = new_sash_position;
 271         }
 272
 273         SizeWindows();
 274     }  // left up && dragging
 275     else if (event.Moving() && !event.Dragging())
 276     {
 277         // Just change the cursor if required
 278         if ( SashHitTest(x, y) )
 279         {
 280                 if ( m_splitMode == wxSPLIT_VERTICAL )
 281                 {
 282                     SetCursor(*m_sashCursorWE);
 283                 }
 284                 else
 285                 {
 286                     SetCursor(*m_sashCursorNS);
 287                 }
 288         }
 289 #if defined(__WXGTK__) || defined(__WXMSW__)
 290         else
 291         {
 292             // We must set the normal cursor in MSW, because
 293             // if the child window doesn't have a cursor, the
 294             // parent's (splitter window) will be used, and this
 295             // must be the standard cursor.
 296
 297             // where else do we unset the cursor?
 298             SetCursor(* wxSTANDARD_CURSOR);
 299         }
 300 #endif // __WXGTK__
 301     }
 302     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 303     {
 304 #ifdef __WXMSW__
 305         // Otherwise, the cursor sometimes reverts to the normal cursor
 306         // during dragging.
 307         if ( m_splitMode == wxSPLIT_VERTICAL )
 308         {
 309             SetCursor(*m_sashCursorWE);
 310         }
 311         else
 312         {
 313             SetCursor(*m_sashCursorNS);
 314         }
 315 #endif
 316
 317         // Obtain window size. We are only interested in the dimension the sash
 318         // splits up
 319         int new_sash_position =
 320             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 321
 322         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 323                                       this);
 324         eventSplitter.m_data.pos = new_sash_position;
 325         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 326         {
 327             new_sash_position = eventSplitter.GetSashPosition();
 328             if ( new_sash_position == -1 )
 329             {
 330                 // change not allowed
 331                 return;
 332             }
 333         }
 334
 335         if (new_sash_position == m_sashPosition)
 336             return;
 337
 338         // Erase old tracker
 339         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 340         {
 341             DrawSashTracker(m_oldX, m_oldY);
 342         }
 343
 344         if (m_splitMode == wxSPLIT_VERTICAL)
 345             x = new_sash_position;
 346         else
 347             y = new_sash_position;
 348
 349         // Remember old positions
 350         m_oldX = x;
 351         m_oldY = y;
 352
 353 #ifdef __WXMSW__
 354         // As we captured the mouse, we may get the mouse events from outside
 355         // our window - for example, negative values in x, y. This has a weird
 356         // consequence under MSW where we use unsigned values sometimes and
 357         // signed ones other times: the coordinates turn as big positive
 358         // numbers and so the sash is drawn on the *right* side of the window
 359         // instead of the left (or bottom instead of top). Correct this.
 360         if ( (short)m_oldX < 0 )
 361             m_oldX = 0;
 362         if ( (short)m_oldY < 0 )
 363             m_oldY = 0;
 364 #endif // __WXMSW__
 365
 366         // Draw new one
 367         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 368         {
 369             DrawSashTracker(m_oldX, m_oldY);
 370         }
 371         else
 372         {
 373             m_sashPosition = new_sash_position;
 374             m_needUpdating = TRUE;
 375         }
 376     }
 377     else if ( event.LeftDClick() )
 378     {
 379         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 380                                       this);
 381         eventSplitter.m_data.pt.x = x;
 382         eventSplitter.m_data.pt.y = y;
 383
 384         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 385     }
 386 }
 387
 388 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 389 {
 390     // only process this message if we're not iconized - otherwise iconizing
 391     // and restoring a window containing the splitter has a funny side effect
 392     // of changing the splitter position!
 393     wxWindow *parent = GetParent();
 394     while ( parent && !parent->IsTopLevel() )
 395     {
 396         parent = parent->GetParent();
 397     }
 398
 399     bool iconized = FALSE;
 400     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 401     if ( frame )
 402         iconized = frame->IsIconized();
 403     else
 404     {
 405         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 406         if ( dialog )
 407             iconized = dialog->IsIconized();
 408         else
 409             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 410     }
 411
 412     if ( iconized )
 413     {
 414         event.Skip();
 415     }
 416     else
 417     {
 418         int cw, ch;
 419         GetClientSize( &cw, &ch );
 420         if ( m_windowTwo )
 421         {
 422             if ( m_splitMode == wxSPLIT_VERTICAL )
 423             {
 424                 if ( m_sashPosition >= (cw - 5) )
 425                     m_sashPosition = wxMax(10, cw - 40);
 426             }
 427             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 428             {
 429                 if ( m_sashPosition >= (ch - 5) )
 430                     m_sashPosition = wxMax(10, ch - 40);
 431             }
 432         }
 433
 434         SizeWindows();
 435     }
 436 }
 437
 438 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 439 {
 440     if ( m_windowTwo == NULL || m_sashPosition == 0)
 441         return FALSE; // No sash
 442
 443     if ( m_splitMode == wxSPLIT_VERTICAL )
 444     {
 445         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 446             return TRUE;
 447         else
 448             return FALSE;
 449     }
 450     else
 451     {
 452         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 453             return TRUE;
 454         else
 455             return FALSE;
 456     }
 457 }
 458
 459 // Draw 3D effect borders
 460 void wxSplitterWindow::DrawBorders(wxDC& dc)
 461 {
 462     int w, h;
 463     GetClientSize(&w, &h);
 464
 465     if ( GetWindowStyleFlag() & wxSP_3DBORDER )
 466     {
 467
 468         dc.SetPen(*m_facePen);
 469         dc.SetBrush(*m_faceBrush);
 470         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 471         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 472         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 473         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 474
 475         dc.SetPen(*m_mediumShadowPen);
 476         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 477         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 478
 479         dc.SetPen(*m_darkShadowPen);
 480         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 481         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 482
 483         dc.SetPen(*m_hilightPen);
 484         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 485         dc.DrawLine(w-m_borderSize+1, m_borderSize - 2, w-m_borderSize+1, h-m_borderSize+2); // Surely the maximum y pos. should be h - 1.
 486                                      /// Anyway, h is required for MSW.
 487
 488         dc.SetPen(*m_lightShadowPen);
 489         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 490         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 491     }
 492     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 493     {
 494         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 495         dc.SetPen(*wxBLACK_PEN);
 496         dc.DrawRectangle(0, 0, w-1, h-1);
 497     }
 498
 499     dc.SetPen(wxNullPen);
 500     dc.SetBrush(wxNullBrush);
 501 }
 502
 503 // Draw the sash
 504 void wxSplitterWindow::DrawSash(wxDC& dc)
 505 {
 506     if ( m_sashPosition == 0 || !m_windowTwo)
 507         return;
 508     if (GetWindowStyle() & wxSP_NOSASH)
 509         return;
 510
 511     int w, h;
 512     GetClientSize(&w, &h);
 513
 514     if ( GetWindowStyleFlag() & wxSP_3DSASH )
 515     {
 516         if ( m_splitMode == wxSPLIT_VERTICAL )
 517         {
 518             dc.SetPen(*m_facePen);
 519
 520             if (HasFlag( wxSP_SASH_AQUA ))
 521                 dc.SetBrush(*wxWHITE_BRUSH);
 522             else
 523                 dc.SetBrush(*m_faceBrush);
 524             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 525
 526             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 527
 528             dc.SetPen(*m_lightShadowPen);
 529             int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 530             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 531
 532             dc.SetPen(*m_hilightPen);
 533             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 534
 535             if (!HasFlag( wxSP_SASH_AQUA ))
 536                 dc.SetPen(*m_mediumShadowPen);
 537
 538             int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 539             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 540
 541             if (HasFlag( wxSP_SASH_AQUA ))
 542                 dc.SetPen(*m_lightShadowPen);
 543             else
 544                 dc.SetPen(*m_darkShadowPen);
 545             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 546
 547             // Draw the top and bottom edges of the sash, if requested
 548             if (GetWindowStyle() & wxSP_FULLSASH)
 549             {
 550                 // Top
 551                 dc.SetPen(*m_hilightPen);
 552                 dc.DrawLine(m_sashPosition+1, m_borderSize, m_sashPosition+m_sashSize-1, m_borderSize);
 553
 554                 // Bottom
 555                 dc.SetPen(*m_darkShadowPen);
 556                 dc.DrawLine(m_sashPosition+1, h-m_borderSize-1, m_sashPosition+m_sashSize-1, h-m_borderSize-1);
 557             }
 558         }
 559         else
 560         {
 561             dc.SetPen(*m_facePen);
 562             if (HasFlag( wxSP_SASH_AQUA ))
 563                 dc.SetBrush(*wxWHITE_BRUSH);
 564             else
 565                 dc.SetBrush(*m_faceBrush);
 566             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 567
 568             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 569
 570             dc.SetPen(*m_lightShadowPen);
 571             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 572
 573             dc.SetPen(*m_hilightPen);
 574             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 575
 576             if (!HasFlag( wxSP_SASH_AQUA ))
 577                 dc.SetPen(*m_mediumShadowPen);
 578             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 579
 580             if (HasFlag( wxSP_SASH_AQUA ))
 581                 dc.SetPen(*m_lightShadowPen);
 582             else
 583                 dc.SetPen(*m_darkShadowPen);
 584             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 585
 586             // Draw the left and right edges of the sash, if requested
 587             if (GetWindowStyle() & wxSP_FULLSASH)
 588             {
 589                 // Left
 590                 dc.SetPen(*m_hilightPen);
 591                 dc.DrawLine(m_borderSize, m_sashPosition, m_borderSize, m_sashPosition+m_sashSize);
 592
 593                 // Right
 594                 dc.SetPen(*m_darkShadowPen);
 595                 dc.DrawLine(w-m_borderSize-1, m_sashPosition+1, w-m_borderSize-1, m_sashPosition+m_sashSize-1);
 596             }
 597         }
 598     }
 599     else
 600     {
 601         if ( m_splitMode == wxSPLIT_VERTICAL )
 602         {
 603             dc.SetPen(*wxBLACK_PEN);
 604             dc.SetBrush(*wxBLACK_BRUSH);
 605             int h1 = h-1;
 606             int y1 = 0;
 607             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 608                 h1 += 1; // Not sure why this is necessary...
 609             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 610             {
 611                 y1 = 2; h1 -= 3;
 612             }
 613             dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 614         }
 615         else
 616         {
 617             dc.SetPen(*wxBLACK_PEN);
 618             dc.SetBrush(*wxBLACK_BRUSH);
 619             int w1 = w-1;
 620             int x1 = 0;
 621             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 622                 w1 ++;
 623             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 624             {
 625                 x1 = 2; w1 -= 3;
 626             }
 627             dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 628         }
 629
 630     }
 631
 632     dc.SetPen(wxNullPen);
 633     dc.SetBrush(wxNullBrush);
 634 }
 635
 636 // Draw the sash tracker (for whilst moving the sash)
 637 void wxSplitterWindow::DrawSashTracker(int x, int y)
 638 {
 639     int w, h;
 640     GetClientSize(&w, &h);
 641
 642     wxScreenDC screenDC;
 643     int x1, y1;
 644     int x2, y2;
 645
 646     if ( m_splitMode == wxSPLIT_VERTICAL )
 647     {
 648         x1 = x; y1 = 2;
 649         x2 = x; y2 = h-2;
 650
 651         if ( x1 > w )
 652         {
 653             x1 = w; x2 = w;
 654         }
 655         else if ( x1 < 0 )
 656         {
 657             x1 = 0; x2 = 0;
 658         }
 659     }
 660     else
 661     {
 662         x1 = 2; y1 = y;
 663         x2 = w-2; y2 = y;
 664
 665         if ( y1 > h )
 666         {
 667             y1 = h;
 668             y2 = h;
 669         }
 670         else if ( y1 < 0 )
 671         {
 672             y1 = 0;
 673             y2 = 0;
 674         }
 675     }
 676
 677     ClientToScreen(&x1, &y1);
 678     ClientToScreen(&x2, &y2);
 679
 680     screenDC.SetLogicalFunction(wxINVERT);
 681     screenDC.SetPen(*m_sashTrackerPen);
 682     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 683
 684     screenDC.DrawLine(x1, y1, x2, y2);
 685
 686     screenDC.SetLogicalFunction(wxCOPY);
 687
 688     screenDC.SetPen(wxNullPen);
 689     screenDC.SetBrush(wxNullBrush);
 690 }
 691
 692 void wxSplitterWindow::AdjustSashPosition(int &sashPos)
 693 {
 694     int w, h;
 695     GetClientSize(&w, &h);
 696     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h;
 697     wxWindow *win;
 698
 699     if ( sashPos < m_minimumPaneSize )
 700         sashPos = m_minimumPaneSize;
 701     else if ( sashPos > window_size - m_minimumPaneSize )
 702         sashPos = window_size - m_minimumPaneSize;
 703
 704     win = GetWindow1();
 705     if ( win )
 706     {
 707         int minSize = (m_splitMode == wxSPLIT_VERTICAL) ?
 708                        win->GetMinWidth() : win->GetMinHeight();
 709         if ( minSize != -1 && sashPos < minSize + GetBorderSize() )
 710             sashPos = minSize + GetBorderSize();
 711     }
 712
 713     win = GetWindow2();
 714     if ( win )
 715     {
 716         int minSize = (m_splitMode == wxSPLIT_VERTICAL) ?
 717                        win->GetMinWidth() : win->GetMinHeight();
 718         if ( minSize != -1 && sashPos > window_size - minSize - GetBorderSize() )
 719             sashPos = window_size - minSize - GetBorderSize();
 720     }
 721 }
 722
 723 // Position and size subwindows.
 724 // Note that the border size applies to each subwindow, not
 725 // including the edges next to the sash.
 726 void wxSplitterWindow::SizeWindows()
 727 {
 728     int w, h;
 729     GetClientSize(&w, &h);
 730
 731     if ( GetWindow1() && !GetWindow2() )
 732     {
 733         GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(), w - 2*GetBorderSize(), h - 2*GetBorderSize());
 734
 735     }
 736     else if ( GetWindow1() && GetWindow2() )
 737     {
 738         if (GetSplitMode() == wxSPLIT_VERTICAL)
 739         {
 740             int x1 = GetBorderSize();
 741             int y1 = GetBorderSize();
 742             int w1 = GetSashPosition() - GetBorderSize();
 743             int h1 = h - 2*GetBorderSize();
 744
 745             int x2 = GetSashPosition() + GetSashSize();
 746             int y2 = GetBorderSize();
 747             int w2 = w - 2*GetBorderSize() - GetSashSize() - w1;
 748             int h2 = h - 2*GetBorderSize();
 749
 750             GetWindow1()->SetSize(x1, y1, w1, h1);
 751             GetWindow2()->SetSize(x2, y2, w2, h2);
 752         }
 753         else
 754         {
 755             GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 756                 w - 2*GetBorderSize(), GetSashPosition() - GetBorderSize());
 757             GetWindow2()->SetSize(GetBorderSize(), GetSashPosition() + GetSashSize(),
 758                 w - 2*GetBorderSize(), h - 2*GetBorderSize() - GetSashSize() - (GetSashPosition() - GetBorderSize()));
 759         }
 760     }
 761     wxClientDC dc(this);
 762     if ( GetBorderSize() > 0 )
 763         DrawBorders(dc);
 764     DrawSash(dc);
 765
 766     SetNeedUpdating(FALSE);
 767 }
 768
 769 // Set pane for unsplit window
 770 void wxSplitterWindow::Initialize(wxWindow *window)
 771 {
 772     m_windowOne = window;
 773     m_windowTwo = (wxWindow *) NULL;
 774     m_sashPosition = 0;
 775 }
 776
 777 // Associates the given window with window 2, drawing the appropriate sash
 778 // and changing the split mode.
 779 // Does nothing and returns FALSE if the window is already split.
 780 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 781 {
 782     if ( IsSplit() )
 783         return FALSE;
 784
 785     int w, h;
 786     GetClientSize(&w, &h);
 787
 788     m_splitMode = wxSPLIT_VERTICAL;
 789     m_windowOne = window1;
 790     m_windowTwo = window2;
 791     if ( sashPosition > 0 )
 792         m_sashPosition = sashPosition;
 793     else if ( sashPosition < 0 )
 794         m_sashPosition = w + sashPosition;   // It's negative so adding is subtracting
 795     else    // default
 796         m_sashPosition = w/2;
 797
 798     AdjustSashPosition(m_sashPosition);
 799
 800     SizeWindows();
 801
 802     return TRUE;
 803 }
 804
 805 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 806 {
 807     if ( IsSplit() )
 808         return FALSE;
 809
 810     int w, h;
 811     GetClientSize(&w, &h);
 812
 813     m_splitMode = wxSPLIT_HORIZONTAL;
 814     m_windowOne = window1;
 815     m_windowTwo = window2;
 816     if ( sashPosition > 0 )
 817         m_sashPosition = sashPosition;
 818     else if ( sashPosition < 0 )
 819         m_sashPosition = h + sashPosition; // It's negative so adding is subtracting
 820     else    // default
 821         m_sashPosition = h/2;
 822
 823     AdjustSashPosition(m_sashPosition);
 824
 825     SizeWindows();
 826
 827     return TRUE;
 828 }
 829
 830
 831 // Remove the specified (or second) window from the view
 832 // Doesn't actually delete the window.
 833 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 834 {
 835     if ( ! IsSplit() )
 836         return FALSE;
 837
 838     wxWindow *win = NULL;
 839     if ( toRemove == NULL || toRemove == m_windowTwo)
 840     {
 841         win = m_windowTwo ;
 842         m_windowTwo = (wxWindow *) NULL;
 843     }
 844     else if ( toRemove == m_windowOne )
 845     {
 846         win = m_windowOne ;
 847         m_windowOne = m_windowTwo;
 848         m_windowTwo = (wxWindow *) NULL;
 849     }
 850     else
 851     {
 852         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 853
 854         return FALSE;
 855     }
 856
 857     SendUnsplitEvent(win);
 858     m_sashPosition = 0;
 859     SizeWindows();
 860
 861     return TRUE;
 862 }
 863
 864 // Replace a window with another one
 865 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 866 {
 867     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 868     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 869
 870     if ( winOld == m_windowTwo )
 871     {
 872         m_windowTwo = winNew;
 873     }
 874     else if ( winOld == m_windowOne )
 875     {
 876         m_windowOne = winNew;
 877     }
 878     else
 879     {
 880         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 881
 882         return FALSE;
 883     }
 884
 885     SizeWindows();
 886
 887     return TRUE;
 888 }
 889
 890 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 891 {
 892     m_sashPosition = position;
 893     AdjustSashPosition(m_sashPosition);
 894
 895     if ( redraw )
 896     {
 897         SizeWindows();
 898     }
 899 }
 900
 901 // Initialize colours
 902 void wxSplitterWindow::InitColours()
 903 {
 904     wxDELETE( m_facePen );
 905     wxDELETE( m_faceBrush );
 906     wxDELETE( m_mediumShadowPen );
 907     wxDELETE( m_darkShadowPen );
 908     wxDELETE( m_lightShadowPen );
 909     wxDELETE( m_hilightPen );
 910
 911     // Shadow colours
 912 #ifndef __WIN16__
 913     wxColour faceColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 914     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 915     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 916
 917     wxColour mediumShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW));
 918     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 919
 920     wxColour darkShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW));
 921     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 922
 923     wxColour lightShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT));
 924     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 925
 926     wxColour hilightColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT));
 927     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 928 #else
 929     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 930     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 931     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 932     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 933     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 934     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 935 #endif // __WIN16__
 936 }
 937
 938 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 939 {
 940     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 941     event.m_data.win = winRemoved;
 942
 943     (void)GetEventHandler()->ProcessEvent(event);
 944 }
 945
 946 // ---------------------------------------------------------------------------
 947 // splitter event handlers
 948 // ---------------------------------------------------------------------------
 949
 950 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 951 {
 952     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 953     const int UNSPLIT_THRESHOLD = 4;
 954
 955     int newSashPosition = event.GetSashPosition();
 956
 957     // Obtain relevant window dimension for bottom / right threshold check
 958     int w, h;
 959     GetClientSize(&w, &h);
 960     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 961
 962     bool unsplit_scenario = FALSE;
 963     if ( m_permitUnsplitAlways
 964             || m_minimumPaneSize == 0 )
 965     {
 966         // Do edge detection if unsplit premitted
 967         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 968         {
 969             // threshold top / left check
 970             newSashPosition = 0;
 971             unsplit_scenario = TRUE;
 972         }
 973         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 974         {
 975             // threshold bottom/right check
 976             newSashPosition = window_size;
 977             unsplit_scenario = TRUE;
 978         }
 979     }
 980
 981     if ( !unsplit_scenario )
 982     {
 983         // If resultant pane would be too small, enlarge it
 984         AdjustSashPosition(newSashPosition);
 985     }
 986
 987     // If the result is out of bounds it means minimum size is too big,
 988     // so split window in half as best compromise.
 989     if ( newSashPosition < 0 || newSashPosition > window_size )
 990         newSashPosition = window_size / 2;
 991
 992     // for compatibility, call the virtual function
 993     if ( !OnSashPositionChange(newSashPosition) )
 994     {
 995         newSashPosition = -1;
 996     }
 997
 998     event.SetSashPosition(newSashPosition);
 999 }
1000
1001 // Called when the sash is double-clicked. The default behaviour is to remove
1002 // the sash if the minimum pane size is zero.
1003 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
1004 {
1005     // for compatibility, call the virtual function
1006     OnDoubleClickSash(event.GetX(), event.GetY());
1007
1008     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
1009     {
1010         Unsplit();
1011     }
1012 }
1013
1014 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
1015 {
1016     wxWindow *win = event.GetWindowBeingRemoved();
1017
1018     // do it before calling OnUnsplit() which may delete the window
1019     win->Show(FALSE);
1020
1021     // for compatibility, call the virtual function
1022     OnUnsplit(win);
1023 }
1024
1025 #if defined(__WXMSW__)
1026     #define WXUNUSED_UNLESS_MSW(identifier)    identifier
1027 #else
1028     #define WXUNUSED_UNLESS_MSW(identifier)    WXUNUSED(identifier)
1029 #endif
1030
1031 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& WXUNUSED_UNLESS_MSW(event))
1032 {
1033     // this is currently called (and needed) under MSW only...
1034 #ifdef __WXMSW__
1035
1036     // if we don't do it, the resizing cursor might be set for child window:
1037     // and like this we explicitly say that our cursor should not be used for
1038     // children windows which overlap us
1039
1040     if ( SashHitTest(event.GetX(), event.GetY()) )
1041     {
1042         // default processing is ok
1043         event.Skip();
1044     }
1045     //else: do nothing, in particular, don't call Skip()
1046 #endif // wxMSW
1047 }