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