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
  36 #if !USE_SHARED_LIBRARY
  37 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  38 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
  39
  40 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  41     EVT_PAINT(wxSplitterWindow::OnPaint)
  42     EVT_SIZE(wxSplitterWindow::OnSize)
  43     EVT_IDLE(wxSplitterWindow::OnIdle)
  44     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  45
  46     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  47     // NB: we borrow OnSashPosChanged for purposes of
  48     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  49     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  50     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  51     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  52 END_EVENT_TABLE()
  53 #endif
  54
  55 wxSplitterWindow::wxSplitterWindow()
  56 {
  57     m_splitMode = wxSPLIT_VERTICAL;
  58     m_permitUnsplitAlways = FALSE;
  59     m_windowOne = (wxWindow *) NULL;
  60     m_windowTwo = (wxWindow *) NULL;
  61     m_dragMode = wxSPLIT_DRAG_NONE;
  62     m_oldX = 0;
  63     m_oldY = 0;
  64     m_firstX = 0;
  65     m_firstY = 0;
  66     m_sashSize = 7;
  67     m_borderSize = 2;
  68     m_sashPosition = 0;
  69     m_sashCursorWE = (wxCursor *) NULL;
  70     m_sashCursorNS = (wxCursor *) NULL;
  71     m_sashTrackerPen = (wxPen *) NULL;
  72     m_lightShadowPen = (wxPen *) NULL;
  73     m_mediumShadowPen = (wxPen *) NULL;
  74     m_darkShadowPen = (wxPen *) NULL;
  75     m_faceBrush = (wxBrush *) NULL;
  76     m_facePen = (wxPen *) NULL;
  77     m_hilightPen = (wxPen *) NULL;
  78     m_minimumPaneSize = 0;
  79     m_needUpdating = FALSE;
  80 }
  81
  82 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  83                                    const wxPoint& pos,
  84                                    const wxSize& size,
  85                                    long style,
  86                                    const wxString& name)
  87                 : wxWindow(parent, id, pos, size, style, name)
  88 {
  89     m_splitMode = wxSPLIT_VERTICAL;
  90     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  91     m_windowOne = (wxWindow *) NULL;
  92     m_windowTwo = (wxWindow *) NULL;
  93     m_dragMode = wxSPLIT_DRAG_NONE;
  94     m_oldX = 0;
  95     m_oldY = 0;
  96     m_firstX = 0;
  97     m_firstY = 0;
  98     m_sashSize = 7;
  99     m_borderSize = 2;
 100     m_sashPosition = 0;
 101     m_minimumPaneSize = 0;
 102     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 103     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 104     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 105     m_lightShadowPen = (wxPen *) NULL;
 106     m_mediumShadowPen = (wxPen *) NULL;
 107     m_darkShadowPen = (wxPen *) NULL;
 108     m_faceBrush = (wxBrush *) NULL;
 109     m_facePen = (wxPen *) NULL;
 110     m_hilightPen = (wxPen *) NULL;
 111
 112     if ( style & wxSP_3D )
 113     {
 114         m_borderSize = 2;
 115         m_sashSize = 7;
 116     }
 117     else if ( style & wxSP_BORDER )
 118     {
 119         m_borderSize = 1;
 120         m_sashSize = 3;
 121     }
 122     else
 123     {
 124         m_borderSize = 0;
 125         m_sashSize = 3;
 126     }
 127
 128     // Eventually, we'll respond to colour change messages
 129     InitColours();
 130
 131     // For debugging purposes, to see the background.
 132 //    SetBackground(wxBLUE_BRUSH);
 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& WXUNUSED(event))
 160 {
 161     if (m_needUpdating)
 162         SizeWindows();
 163 }
 164
 165 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 166 {
 167     long x = event.GetX();
 168     long y = event.GetY();
 169
 170     // reset the cursor
 171 #ifdef __WXMOTIF__
 172     SetCursor(* wxSTANDARD_CURSOR);
 173 #endif
 174 #ifdef __WXMSW__
 175     SetCursor(wxCursor());
 176 #endif
 177
 178
 179     if (event.LeftDown())
 180     {
 181         if ( SashHitTest(x, y) )
 182         {
 183             CaptureMouse();
 184
 185             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 186
 187             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 188             {
 189                 DrawSashTracker(x, y);
 190             }
 191
 192             m_oldX = x;
 193             m_oldY = y;
 194             return;
 195         }
 196     }
 197     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 198     {
 199         // We can stop dragging now and see what we've got.
 200         m_dragMode = wxSPLIT_DRAG_NONE;
 201         ReleaseMouse();
 202
 203         // Erase old tracker
 204         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 205         {
 206             DrawSashTracker(m_oldX, m_oldY);
 207         }
 208
 209         // Obtain window size. We are only interested in the dimension the sash
 210         // splits up
 211         int w, h;
 212         GetClientSize(&w, &h);
 213         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 214         int new_sash_position =
 215             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 216
 217         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 218                                       this);
 219         eventSplitter.m_data.pos = new_sash_position;
 220         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 221         {
 222             new_sash_position = eventSplitter.GetSashPosition();
 223             if ( new_sash_position == -1 )
 224             {
 225                 // change not allowed
 226                 return;
 227             }
 228         }
 229
 230         if ( m_permitUnsplitAlways
 231                 || m_minimumPaneSize == 0 )
 232         {
 233             // Deal with possible unsplit scenarios
 234             if ( new_sash_position == 0 )
 235             {
 236                 // We remove the first window from the view
 237                 wxWindow *removedWindow = m_windowOne;
 238                 m_windowOne = m_windowTwo;
 239                 m_windowTwo = (wxWindow *) NULL;
 240                 SendUnsplitEvent(removedWindow);
 241                 m_sashPosition = 0;
 242             }
 243             else if ( new_sash_position == window_size )
 244             {
 245                 // We remove the second window from the view
 246                 wxWindow *removedWindow = m_windowTwo;
 247                 m_windowTwo = (wxWindow *) NULL;
 248                 SendUnsplitEvent(removedWindow);
 249                 m_sashPosition = 0;
 250             }
 251             else
 252             {
 253                 m_sashPosition = new_sash_position;
 254             }
 255         }
 256         else
 257         {
 258             m_sashPosition = new_sash_position;
 259         }
 260
 261         SizeWindows();
 262     }  // left up && dragging
 263     else if (event.Moving() && !event.Dragging())
 264     {
 265         // Just change the cursor if required
 266         if ( SashHitTest(x, y) )
 267         {
 268                 if ( m_splitMode == wxSPLIT_VERTICAL )
 269                 {
 270                     SetCursor(*m_sashCursorWE);
 271                 }
 272                 else
 273                 {
 274                     SetCursor(*m_sashCursorNS);
 275                 }
 276         }
 277 #ifdef __WXGTK__
 278         else
 279         {
 280             // where else do we unset the cursor?
 281             SetCursor(* wxSTANDARD_CURSOR);
 282         }
 283 #endif // __WXGTK__
 284     }
 285     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 286     {
 287         // Obtain window size. We are only interested in the dimension the sash
 288         // splits up
 289         int new_sash_position =
 290             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 291
 292         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 293                                       this);
 294         eventSplitter.m_data.pos = new_sash_position;
 295         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 296         {
 297             new_sash_position = eventSplitter.GetSashPosition();
 298             if ( new_sash_position == -1 )
 299             {
 300                 // change not allowed
 301                 return;
 302             }
 303         }
 304
 305         // Erase old tracker
 306         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 307         {
 308             DrawSashTracker(m_oldX, m_oldY);
 309         }
 310
 311         if (m_splitMode == wxSPLIT_VERTICAL)
 312             x = new_sash_position;
 313         else
 314             y = new_sash_position;
 315
 316         if (new_sash_position != -1)
 317         {
 318             // Only modify if permitted
 319             m_oldX = x;
 320             m_oldY = y;
 321         }
 322
 323 #ifdef __WXMSW__
 324         // As we captured the mouse, we may get the mouse events from outside
 325         // our window - for example, negative values in x, y. This has a weird
 326         // consequence under MSW where we use unsigned values sometimes and
 327         // signed ones other times: the coordinates turn as big positive
 328         // numbers and so the sash is drawn on the *right* side of the window
 329         // instead of the left (or bottom instead of top). Correct this.
 330         if ( (short)m_oldX < 0 )
 331             m_oldX = 0;
 332         if ( (short)m_oldY < 0 )
 333             m_oldY = 0;
 334 #endif // __WXMSW__
 335
 336         // Draw new one
 337         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 338         {
 339             DrawSashTracker(m_oldX, m_oldY);
 340         }
 341         else
 342         {
 343             m_sashPosition = new_sash_position;
 344             m_needUpdating = TRUE;
 345         }
 346     }
 347     else if ( event.LeftDClick() )
 348     {
 349         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 350                                       this);
 351         eventSplitter.m_data.pt.x = x;
 352         eventSplitter.m_data.pt.y = y;
 353
 354         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 355     }
 356 }
 357
 358 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 359 {
 360     // only process this message if we're not iconized - otherwise iconizing
 361     // and restoring a window containing the splitter has a funny side effect
 362     // of changing the splitter position!
 363     wxWindow *parent = GetParent();
 364     while ( parent && !parent->IsTopLevel() )
 365     {
 366         parent = parent->GetParent();
 367     }
 368
 369     bool iconized = FALSE;
 370     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 371     if ( frame )
 372         iconized = frame->IsIconized();
 373     else
 374     {
 375         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 376         if ( dialog )
 377             iconized = dialog->IsIconized();
 378         else
 379             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 380     }
 381
 382     if ( iconized )
 383     {
 384         event.Skip();
 385     }
 386     else
 387     {
 388         int cw, ch;
 389         GetClientSize( &cw, &ch );
 390         if ( m_windowTwo )
 391         {
 392             if ( m_splitMode == wxSPLIT_VERTICAL )
 393             {
 394                 if ( m_sashPosition >= (cw - 5) )
 395                     m_sashPosition = wxMax(10, cw - 40);
 396             }
 397             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 398             {
 399                 if ( m_sashPosition >= (ch - 5) )
 400                     m_sashPosition = wxMax(10, ch - 40);
 401             }
 402         }
 403
 404         SizeWindows();
 405     }
 406 }
 407
 408 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 409 {
 410     if ( m_windowTwo == NULL || m_sashPosition == 0)
 411         return FALSE; // No sash
 412
 413     if ( m_splitMode == wxSPLIT_VERTICAL )
 414     {
 415         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 416             return TRUE;
 417         else
 418             return FALSE;
 419     }
 420     else
 421     {
 422         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 423             return TRUE;
 424         else
 425             return FALSE;
 426     }
 427 }
 428
 429 // Draw 3D effect borders
 430 void wxSplitterWindow::DrawBorders(wxDC& dc)
 431 {
 432     int w, h;
 433     GetClientSize(&w, &h);
 434
 435     if ( GetWindowStyleFlag() & wxSP_3D )
 436     {
 437
 438         dc.SetPen(*m_facePen);
 439         dc.SetBrush(*m_faceBrush);
 440         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 441         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 442         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 443         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 444
 445         dc.SetPen(*m_mediumShadowPen);
 446         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 447         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 448
 449         dc.SetPen(*m_darkShadowPen);
 450         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 451         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 452
 453         dc.SetPen(*m_hilightPen);
 454         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 455         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.
 456                                      /// Anyway, h is required for MSW.
 457
 458         dc.SetPen(*m_lightShadowPen);
 459         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 460         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 461     }
 462     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 463     {
 464         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 465         dc.SetPen(*wxBLACK_PEN);
 466         dc.DrawRectangle(0, 0, w-1, h-1);
 467     }
 468
 469     dc.SetPen(wxNullPen);
 470     dc.SetBrush(wxNullBrush);
 471 }
 472
 473 // Draw the sash
 474 void wxSplitterWindow::DrawSash(wxDC& dc)
 475 {
 476     if ( m_sashPosition == 0 || !m_windowTwo)
 477         return;
 478
 479     int w, h;
 480     GetClientSize(&w, &h);
 481
 482     if ( GetWindowStyleFlag() & wxSP_3D )
 483     {
 484         if ( m_splitMode == wxSPLIT_VERTICAL )
 485         {
 486             dc.SetPen(*m_facePen);
 487             dc.SetBrush(*m_faceBrush);
 488             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 489
 490             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 491
 492             dc.SetPen(*m_lightShadowPen);
 493                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 494             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 495
 496             dc.SetPen(*m_hilightPen);
 497             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 498
 499             dc.SetPen(*m_mediumShadowPen);
 500                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 501             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 502
 503             dc.SetPen(*m_darkShadowPen);
 504             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 505         }
 506         else
 507         {
 508             dc.SetPen(*m_facePen);
 509             dc.SetBrush(*m_faceBrush);
 510             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 511
 512             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 513
 514             dc.SetPen(*m_lightShadowPen);
 515             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 516
 517             dc.SetPen(*m_hilightPen);
 518             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 519
 520             dc.SetPen(*m_mediumShadowPen);
 521             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 522
 523             dc.SetPen(*m_darkShadowPen);
 524             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 525         }
 526     }
 527     else
 528     {
 529         if ( m_splitMode == wxSPLIT_VERTICAL )
 530         {
 531             dc.SetPen(*wxBLACK_PEN);
 532             dc.SetBrush(*wxBLACK_BRUSH);
 533             int h1 = h-1;
 534             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 535                 h1 += 1; // Not sure why this is necessary...
 536             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 537         }
 538         else
 539         {
 540             dc.SetPen(*wxBLACK_PEN);
 541             dc.SetBrush(*wxBLACK_BRUSH);
 542             int w1 = w-1;
 543             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 544                 w1 ++;
 545
 546             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 547         }
 548
 549     }
 550
 551     dc.SetPen(wxNullPen);
 552     dc.SetBrush(wxNullBrush);
 553 }
 554
 555 // Draw the sash tracker (for whilst moving the sash)
 556 void wxSplitterWindow::DrawSashTracker(int x, int y)
 557 {
 558     int w, h;
 559     GetClientSize(&w, &h);
 560
 561     wxScreenDC screenDC;
 562     int x1, y1;
 563     int x2, y2;
 564
 565     if ( m_splitMode == wxSPLIT_VERTICAL )
 566     {
 567         x1 = x; y1 = 2;
 568         x2 = x; y2 = h-2;
 569
 570         if ( x1 > w )
 571         {
 572             x1 = w; x2 = w;
 573         }
 574         else if ( x1 < 0 )
 575         {
 576             x1 = 0; x2 = 0;
 577         }
 578     }
 579     else
 580     {
 581         x1 = 2; y1 = y;
 582         x2 = w-2; y2 = y;
 583
 584         if ( y1 > h )
 585         {
 586             y1 = h;
 587             y2 = h;
 588         }
 589         else if ( y1 < 0 )
 590         {
 591             y1 = 0;
 592             y2 = 0;
 593         }
 594     }
 595
 596     ClientToScreen(&x1, &y1);
 597     ClientToScreen(&x2, &y2);
 598
 599     screenDC.SetLogicalFunction(wxINVERT);
 600     screenDC.SetPen(*m_sashTrackerPen);
 601     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 602
 603     screenDC.DrawLine(x1, y1, x2, y2);
 604
 605     screenDC.SetLogicalFunction(wxCOPY);
 606
 607     screenDC.SetPen(wxNullPen);
 608     screenDC.SetBrush(wxNullBrush);
 609 }
 610
 611 // Position and size subwindows.
 612 // Note that the border size applies to each subwindow, not
 613 // including the edges next to the sash.
 614 void wxSplitterWindow::SizeWindows()
 615 {
 616     int w, h;
 617     GetClientSize(&w, &h);
 618
 619     if ( m_windowOne && !m_windowTwo )
 620     {
 621         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 622
 623     }
 624     else if ( m_windowOne && m_windowTwo )
 625     {
 626         if (m_splitMode == wxSPLIT_VERTICAL)
 627         {
 628             int x1 = m_borderSize;
 629             int y1 = m_borderSize;
 630             int w1 = m_sashPosition - m_borderSize;
 631             int h1 = h - 2*m_borderSize;
 632
 633             int x2 = m_sashPosition + m_sashSize;
 634             int y2 = m_borderSize;
 635             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 636             int h2 = h - 2*m_borderSize;
 637
 638             m_windowOne->SetSize(x1, y1, w1, h1);
 639             m_windowTwo->SetSize(x2, y2, w2, h2);
 640
 641         }
 642         else
 643         {
 644             m_windowOne->SetSize(m_borderSize, m_borderSize,
 645                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 646             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 647                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 648
 649         }
 650     }
 651     wxClientDC dc(this);
 652     if ( m_borderSize > 0 )
 653         DrawBorders(dc);
 654     DrawSash(dc);
 655 }
 656
 657 // Set pane for unsplit window
 658 void wxSplitterWindow::Initialize(wxWindow *window)
 659 {
 660     m_windowOne = window;
 661     m_windowTwo = (wxWindow *) NULL;
 662     m_sashPosition = 0;
 663 }
 664
 665 // Associates the given window with window 2, drawing the appropriate sash
 666 // and changing the split mode.
 667 // Does nothing and returns FALSE if the window is already split.
 668 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 669 {
 670     if ( IsSplit() )
 671         return FALSE;
 672
 673     int w, h;
 674     GetClientSize(&w, &h);
 675
 676     m_splitMode = wxSPLIT_VERTICAL;
 677     m_windowOne = window1;
 678     m_windowTwo = window2;
 679     if ( sashPosition > 0 )
 680         m_sashPosition = sashPosition;
 681     else if ( sashPosition < 0 )
 682         m_sashPosition = w - sashPosition;
 683     else    // default
 684         m_sashPosition = w/2;
 685
 686     SizeWindows();
 687
 688     return TRUE;
 689 }
 690
 691 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 692 {
 693     if ( IsSplit() )
 694         return FALSE;
 695
 696     int w, h;
 697     GetClientSize(&w, &h);
 698
 699     m_splitMode = wxSPLIT_HORIZONTAL;
 700     m_windowOne = window1;
 701     m_windowTwo = window2;
 702     if ( sashPosition > 0 )
 703         m_sashPosition = sashPosition;
 704     else if ( sashPosition < 0 )
 705         m_sashPosition = h - sashPosition;
 706     else    // default
 707         m_sashPosition = h/2;
 708
 709     SizeWindows();
 710
 711     return TRUE;
 712 }
 713
 714
 715 // Remove the specified (or second) window from the view
 716 // Doesn't actually delete the window.
 717 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 718 {
 719     if ( ! IsSplit() )
 720         return FALSE;
 721
 722     wxWindow *win = NULL;
 723     if ( toRemove == NULL || toRemove == m_windowTwo)
 724     {
 725         win = m_windowTwo ;
 726         m_windowTwo = (wxWindow *) NULL;
 727     }
 728     else if ( toRemove == m_windowOne )
 729     {
 730         win = m_windowOne ;
 731         m_windowOne = m_windowTwo;
 732         m_windowTwo = (wxWindow *) NULL;
 733     }
 734     else
 735     {
 736         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 737
 738         return FALSE;
 739     }
 740
 741     SendUnsplitEvent(win);
 742     m_sashPosition = 0;
 743     SizeWindows();
 744
 745     return TRUE;
 746 }
 747
 748 // Replace a window with another one
 749 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 750 {
 751     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 752     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 753
 754     if ( winOld == m_windowTwo )
 755     {
 756         m_windowTwo = winNew;
 757     }
 758     else if ( winOld == m_windowOne )
 759     {
 760         m_windowOne = winNew;
 761     }
 762     else
 763     {
 764         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 765
 766         return FALSE;
 767     }
 768
 769     SizeWindows();
 770
 771     return TRUE;
 772 }
 773
 774 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 775 {
 776     m_sashPosition = position;
 777
 778     if ( redraw )
 779     {
 780         SizeWindows();
 781     }
 782 }
 783
 784 // Initialize colours
 785 void wxSplitterWindow::InitColours()
 786 {
 787     wxDELETE( m_facePen );
 788     wxDELETE( m_faceBrush );
 789     wxDELETE( m_mediumShadowPen );
 790     wxDELETE( m_darkShadowPen );
 791     wxDELETE( m_lightShadowPen );
 792     wxDELETE( m_hilightPen );
 793
 794     // Shadow colours
 795 #if defined(__WIN95__)
 796     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 797     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 798     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 799
 800     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 801     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 802
 803     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 804     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 805
 806     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 807     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 808
 809     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 810     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 811 #else // !Win32
 812     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 813     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 814     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 815     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 816     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 817     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 818 #endif // Win32/!Win32
 819 }
 820
 821 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 822 {
 823     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 824     event.m_data.win = winRemoved;
 825
 826     (void)GetEventHandler()->ProcessEvent(event);
 827 }
 828
 829 // ---------------------------------------------------------------------------
 830 // splitter event handlers
 831 // ---------------------------------------------------------------------------
 832
 833 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 834 {
 835     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 836     const int UNSPLIT_THRESHOLD = 4;
 837
 838     int newSashPosition = event.GetSashPosition();
 839
 840     // Obtain relevant window dimension for bottom / right threshold check
 841     int w, h;
 842     GetClientSize(&w, &h);
 843     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 844
 845     bool unsplit_scenario = FALSE;
 846     if ( m_permitUnsplitAlways
 847             || m_minimumPaneSize == 0 )
 848     {
 849         // Do edge detection if unsplit premitted
 850         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 851         {
 852             // threshold top / left check
 853             newSashPosition = 0;
 854             unsplit_scenario = TRUE;
 855         }
 856         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 857         {
 858             // threshold bottom/right check
 859             newSashPosition = window_size;
 860             unsplit_scenario = TRUE;
 861         }
 862     }
 863
 864     if ( !unsplit_scenario )
 865     {
 866         // If resultant pane would be too small, enlarge it
 867         if ( newSashPosition < m_minimumPaneSize )
 868             newSashPosition = m_minimumPaneSize;
 869         if ( newSashPosition > window_size - m_minimumPaneSize )
 870             newSashPosition = window_size - m_minimumPaneSize;
 871     }
 872
 873     // If the result is out of bounds it means minimum size is too big,
 874     // so split window in half as best compromise.
 875     if ( newSashPosition < 0 || newSashPosition > window_size )
 876         newSashPosition = window_size / 2;
 877
 878     // for compatibility, call the virtual function
 879     if ( !OnSashPositionChange(newSashPosition) )
 880     {
 881         newSashPosition = -1;
 882     }
 883
 884     event.SetSashPosition(newSashPosition);
 885 }
 886
 887 // Called when the sash is double-clicked. The default behaviour is to remove
 888 // the sash if the minimum pane size is zero.
 889 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 890 {
 891     // for compatibility, call the virtual function
 892     OnDoubleClickSash(event.GetX(), event.GetY());
 893
 894     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 895     {
 896         Unsplit();
 897     }
 898 }
 899
 900 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 901 {
 902     wxWindow *win = event.GetWindowBeingRemoved();
 903
 904     // do it before calling OnUnsplit() which may delete the window
 905     win->Show(FALSE);
 906
 907     // for compatibility, call the virtual function
 908     OnUnsplit(win);
 909 }