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 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  37 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
  38
  39 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  40     EVT_PAINT(wxSplitterWindow::OnPaint)
  41     EVT_SIZE(wxSplitterWindow::OnSize)
  42     EVT_IDLE(wxSplitterWindow::OnIdle)
  43     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  44
  45     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  46     // NB: we borrow OnSashPosChanged for purposes of
  47     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  48     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  49     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  50     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  51 END_EVENT_TABLE()
  52
  53 wxSplitterWindow::wxSplitterWindow()
  54 {
  55     m_splitMode = wxSPLIT_VERTICAL;
  56     m_permitUnsplitAlways = FALSE;
  57     m_windowOne = (wxWindow *) NULL;
  58     m_windowTwo = (wxWindow *) NULL;
  59     m_dragMode = wxSPLIT_DRAG_NONE;
  60     m_oldX = 0;
  61     m_oldY = 0;
  62     m_firstX = 0;
  63     m_firstY = 0;
  64     m_sashSize = 7;
  65     m_borderSize = 2;
  66     m_sashPosition = 0;
  67     m_sashCursorWE = (wxCursor *) NULL;
  68     m_sashCursorNS = (wxCursor *) NULL;
  69     m_sashTrackerPen = (wxPen *) NULL;
  70     m_lightShadowPen = (wxPen *) NULL;
  71     m_mediumShadowPen = (wxPen *) NULL;
  72     m_darkShadowPen = (wxPen *) NULL;
  73     m_faceBrush = (wxBrush *) NULL;
  74     m_facePen = (wxPen *) NULL;
  75     m_hilightPen = (wxPen *) NULL;
  76     m_minimumPaneSize = 0;
  77     m_needUpdating = FALSE;
  78 }
  79
  80 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  81                                    const wxPoint& pos,
  82                                    const wxSize& size,
  83                                    long style,
  84                                    const wxString& name)
  85                 : wxWindow(parent, id, pos, size, style, name)
  86 {
  87     m_splitMode = wxSPLIT_VERTICAL;
  88     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  89     m_windowOne = (wxWindow *) NULL;
  90     m_windowTwo = (wxWindow *) NULL;
  91     m_dragMode = wxSPLIT_DRAG_NONE;
  92     m_oldX = 0;
  93     m_oldY = 0;
  94     m_firstX = 0;
  95     m_firstY = 0;
  96     m_sashSize = 7;
  97     m_borderSize = 2;
  98     m_sashPosition = 0;
  99     m_minimumPaneSize = 0;
 100     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 101     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 102     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 103     m_lightShadowPen = (wxPen *) NULL;
 104     m_mediumShadowPen = (wxPen *) NULL;
 105     m_darkShadowPen = (wxPen *) NULL;
 106     m_faceBrush = (wxBrush *) NULL;
 107     m_facePen = (wxPen *) NULL;
 108     m_hilightPen = (wxPen *) NULL;
 109
 110     if ( style & wxSP_3D )
 111     {
 112         m_borderSize = 2;
 113         m_sashSize = 7;
 114     }
 115     else if ( style & wxSP_BORDER )
 116     {
 117         m_borderSize = 1;
 118         m_sashSize = 3;
 119     }
 120     else
 121     {
 122         m_borderSize = 0;
 123         m_sashSize = 3;
 124     }
 125
 126     // Eventually, we'll respond to colour change messages
 127     InitColours();
 128
 129     // For debugging purposes, to see the background.
 130 //    SetBackground(wxBLUE_BRUSH);
 131
 132     m_needUpdating = FALSE;
 133 }
 134
 135 wxSplitterWindow::~wxSplitterWindow()
 136 {
 137     delete m_sashCursorWE;
 138     delete m_sashCursorNS;
 139     delete m_sashTrackerPen;
 140     delete m_lightShadowPen;
 141     delete m_darkShadowPen;
 142     delete m_mediumShadowPen;
 143     delete m_hilightPen;
 144     delete m_facePen;
 145     delete m_faceBrush;
 146 }
 147
 148 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 149 {
 150     wxPaintDC dc(this);
 151
 152     if ( m_borderSize > 0 )
 153         DrawBorders(dc);
 154     DrawSash(dc);
 155 }
 156
 157 void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 158 {
 159     if (m_needUpdating)
 160         SizeWindows();
 161 }
 162
 163 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 164 {
 165     wxCoord x = event.GetX(),
 166             y = event.GetY();
 167
 168     // reset the cursor
 169 #ifdef __WXMOTIF__
 170     SetCursor(* wxSTANDARD_CURSOR);
 171 #endif
 172 #ifdef __WXMSW__
 173     SetCursor(wxCursor());
 174 #endif
 175
 176
 177     if (event.LeftDown())
 178     {
 179         if ( SashHitTest(x, y) )
 180         {
 181             CaptureMouse();
 182
 183             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 184
 185             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 186             {
 187                 DrawSashTracker(x, y);
 188             }
 189
 190             m_oldX = x;
 191             m_oldY = y;
 192             return;
 193         }
 194     }
 195     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 196     {
 197         // We can stop dragging now and see what we've got.
 198         m_dragMode = wxSPLIT_DRAG_NONE;
 199         ReleaseMouse();
 200
 201         // Erase old tracker
 202         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 203         {
 204             DrawSashTracker(m_oldX, m_oldY);
 205         }
 206
 207         // Obtain window size. We are only interested in the dimension the sash
 208         // splits up
 209         int w, h;
 210         GetClientSize(&w, &h);
 211         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 212         int new_sash_position =
 213             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 214
 215         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 216                                       this);
 217         eventSplitter.m_data.pos = new_sash_position;
 218         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 219         {
 220             new_sash_position = eventSplitter.GetSashPosition();
 221             if ( new_sash_position == -1 )
 222             {
 223                 // change not allowed
 224                 return;
 225             }
 226         }
 227
 228         if ( m_permitUnsplitAlways
 229                 || m_minimumPaneSize == 0 )
 230         {
 231             // Deal with possible unsplit scenarios
 232             if ( new_sash_position == 0 )
 233             {
 234                 // We remove the first window from the view
 235                 wxWindow *removedWindow = m_windowOne;
 236                 m_windowOne = m_windowTwo;
 237                 m_windowTwo = (wxWindow *) NULL;
 238                 SendUnsplitEvent(removedWindow);
 239                 m_sashPosition = 0;
 240             }
 241             else if ( new_sash_position == window_size )
 242             {
 243                 // We remove the second window from the view
 244                 wxWindow *removedWindow = m_windowTwo;
 245                 m_windowTwo = (wxWindow *) NULL;
 246                 SendUnsplitEvent(removedWindow);
 247                 m_sashPosition = 0;
 248             }
 249             else
 250             {
 251                 m_sashPosition = new_sash_position;
 252             }
 253         }
 254         else
 255         {
 256             m_sashPosition = new_sash_position;
 257         }
 258
 259         SizeWindows();
 260     }  // left up && dragging
 261     else if (event.Moving() && !event.Dragging())
 262     {
 263         // Just change the cursor if required
 264         if ( SashHitTest(x, y) )
 265         {
 266                 if ( m_splitMode == wxSPLIT_VERTICAL )
 267                 {
 268                     SetCursor(*m_sashCursorWE);
 269                 }
 270                 else
 271                 {
 272                     SetCursor(*m_sashCursorNS);
 273                 }
 274         }
 275 #ifdef __WXGTK__
 276         else
 277         {
 278             // where else do we unset the cursor?
 279             SetCursor(* wxSTANDARD_CURSOR);
 280         }
 281 #endif // __WXGTK__
 282     }
 283     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 284     {
 285         // Obtain window size. We are only interested in the dimension the sash
 286         // splits up
 287         int new_sash_position =
 288             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 289
 290         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 291                                       this);
 292         eventSplitter.m_data.pos = new_sash_position;
 293         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 294         {
 295             new_sash_position = eventSplitter.GetSashPosition();
 296             if ( new_sash_position == -1 )
 297             {
 298                 // change not allowed
 299                 return;
 300             }
 301         }
 302
 303         // Erase old tracker
 304         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 305         {
 306             DrawSashTracker(m_oldX, m_oldY);
 307         }
 308
 309         if (m_splitMode == wxSPLIT_VERTICAL)
 310             x = new_sash_position;
 311         else
 312             y = new_sash_position;
 313
 314         if (new_sash_position != -1)
 315         {
 316             // Only modify if permitted
 317             m_oldX = x;
 318             m_oldY = y;
 319         }
 320
 321 #ifdef __WXMSW__
 322         // As we captured the mouse, we may get the mouse events from outside
 323         // our window - for example, negative values in x, y. This has a weird
 324         // consequence under MSW where we use unsigned values sometimes and
 325         // signed ones other times: the coordinates turn as big positive
 326         // numbers and so the sash is drawn on the *right* side of the window
 327         // instead of the left (or bottom instead of top). Correct this.
 328         if ( (short)m_oldX < 0 )
 329             m_oldX = 0;
 330         if ( (short)m_oldY < 0 )
 331             m_oldY = 0;
 332 #endif // __WXMSW__
 333
 334         // Draw new one
 335         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 336         {
 337             DrawSashTracker(m_oldX, m_oldY);
 338         }
 339         else
 340         {
 341             m_sashPosition = new_sash_position;
 342             m_needUpdating = TRUE;
 343         }
 344     }
 345     else if ( event.LeftDClick() )
 346     {
 347         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 348                                       this);
 349         eventSplitter.m_data.pt.x = x;
 350         eventSplitter.m_data.pt.y = y;
 351
 352         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 353     }
 354 }
 355
 356 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 357 {
 358     // only process this message if we're not iconized - otherwise iconizing
 359     // and restoring a window containing the splitter has a funny side effect
 360     // of changing the splitter position!
 361     wxWindow *parent = GetParent();
 362     while ( parent && !parent->IsTopLevel() )
 363     {
 364         parent = parent->GetParent();
 365     }
 366
 367     bool iconized = FALSE;
 368     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 369     if ( frame )
 370         iconized = frame->IsIconized();
 371     else
 372     {
 373         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 374         if ( dialog )
 375             iconized = dialog->IsIconized();
 376         else
 377             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 378     }
 379
 380     if ( iconized )
 381     {
 382         event.Skip();
 383     }
 384     else
 385     {
 386         int cw, ch;
 387         GetClientSize( &cw, &ch );
 388         if ( m_windowTwo )
 389         {
 390             if ( m_splitMode == wxSPLIT_VERTICAL )
 391             {
 392                 if ( m_sashPosition >= (cw - 5) )
 393                     m_sashPosition = wxMax(10, cw - 40);
 394             }
 395             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 396             {
 397                 if ( m_sashPosition >= (ch - 5) )
 398                     m_sashPosition = wxMax(10, ch - 40);
 399             }
 400         }
 401
 402         SizeWindows();
 403     }
 404 }
 405
 406 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 407 {
 408     if ( m_windowTwo == NULL || m_sashPosition == 0)
 409         return FALSE; // No sash
 410
 411     if ( m_splitMode == wxSPLIT_VERTICAL )
 412     {
 413         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 414             return TRUE;
 415         else
 416             return FALSE;
 417     }
 418     else
 419     {
 420         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 421             return TRUE;
 422         else
 423             return FALSE;
 424     }
 425 }
 426
 427 // Draw 3D effect borders
 428 void wxSplitterWindow::DrawBorders(wxDC& dc)
 429 {
 430     int w, h;
 431     GetClientSize(&w, &h);
 432
 433     if ( GetWindowStyleFlag() & wxSP_3D )
 434     {
 435
 436         dc.SetPen(*m_facePen);
 437         dc.SetBrush(*m_faceBrush);
 438         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 439         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 440         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 441         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 442
 443         dc.SetPen(*m_mediumShadowPen);
 444         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 445         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 446
 447         dc.SetPen(*m_darkShadowPen);
 448         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 449         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 450
 451         dc.SetPen(*m_hilightPen);
 452         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 453         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.
 454                                      /// Anyway, h is required for MSW.
 455
 456         dc.SetPen(*m_lightShadowPen);
 457         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 458         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 459     }
 460     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 461     {
 462         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 463         dc.SetPen(*wxBLACK_PEN);
 464         dc.DrawRectangle(0, 0, w-1, h-1);
 465     }
 466
 467     dc.SetPen(wxNullPen);
 468     dc.SetBrush(wxNullBrush);
 469 }
 470
 471 // Draw the sash
 472 void wxSplitterWindow::DrawSash(wxDC& dc)
 473 {
 474     if ( m_sashPosition == 0 || !m_windowTwo)
 475         return;
 476
 477     int w, h;
 478     GetClientSize(&w, &h);
 479
 480     if ( GetWindowStyleFlag() & wxSP_3D )
 481     {
 482         if ( m_splitMode == wxSPLIT_VERTICAL )
 483         {
 484             dc.SetPen(*m_facePen);
 485             dc.SetBrush(*m_faceBrush);
 486             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 487
 488             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 489
 490             dc.SetPen(*m_lightShadowPen);
 491                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 492             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 493
 494             dc.SetPen(*m_hilightPen);
 495             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 496
 497             dc.SetPen(*m_mediumShadowPen);
 498                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 499             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 500
 501             dc.SetPen(*m_darkShadowPen);
 502             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 503         }
 504         else
 505         {
 506             dc.SetPen(*m_facePen);
 507             dc.SetBrush(*m_faceBrush);
 508             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 509
 510             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 511
 512             dc.SetPen(*m_lightShadowPen);
 513             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 514
 515             dc.SetPen(*m_hilightPen);
 516             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 517
 518             dc.SetPen(*m_mediumShadowPen);
 519             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 520
 521             dc.SetPen(*m_darkShadowPen);
 522             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 523         }
 524     }
 525     else
 526     {
 527         if ( m_splitMode == wxSPLIT_VERTICAL )
 528         {
 529             dc.SetPen(*wxBLACK_PEN);
 530             dc.SetBrush(*wxBLACK_BRUSH);
 531             int h1 = h-1;
 532             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 533                 h1 += 1; // Not sure why this is necessary...
 534             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 535         }
 536         else
 537         {
 538             dc.SetPen(*wxBLACK_PEN);
 539             dc.SetBrush(*wxBLACK_BRUSH);
 540             int w1 = w-1;
 541             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 542                 w1 ++;
 543
 544             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 545         }
 546
 547     }
 548
 549     dc.SetPen(wxNullPen);
 550     dc.SetBrush(wxNullBrush);
 551 }
 552
 553 // Draw the sash tracker (for whilst moving the sash)
 554 void wxSplitterWindow::DrawSashTracker(int x, int y)
 555 {
 556     int w, h;
 557     GetClientSize(&w, &h);
 558
 559     wxScreenDC screenDC;
 560     int x1, y1;
 561     int x2, y2;
 562
 563     if ( m_splitMode == wxSPLIT_VERTICAL )
 564     {
 565         x1 = x; y1 = 2;
 566         x2 = x; y2 = h-2;
 567
 568         if ( x1 > w )
 569         {
 570             x1 = w; x2 = w;
 571         }
 572         else if ( x1 < 0 )
 573         {
 574             x1 = 0; x2 = 0;
 575         }
 576     }
 577     else
 578     {
 579         x1 = 2; y1 = y;
 580         x2 = w-2; y2 = y;
 581
 582         if ( y1 > h )
 583         {
 584             y1 = h;
 585             y2 = h;
 586         }
 587         else if ( y1 < 0 )
 588         {
 589             y1 = 0;
 590             y2 = 0;
 591         }
 592     }
 593
 594     ClientToScreen(&x1, &y1);
 595     ClientToScreen(&x2, &y2);
 596
 597     screenDC.SetLogicalFunction(wxINVERT);
 598     screenDC.SetPen(*m_sashTrackerPen);
 599     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 600
 601     screenDC.DrawLine(x1, y1, x2, y2);
 602
 603     screenDC.SetLogicalFunction(wxCOPY);
 604
 605     screenDC.SetPen(wxNullPen);
 606     screenDC.SetBrush(wxNullBrush);
 607 }
 608
 609 // Position and size subwindows.
 610 // Note that the border size applies to each subwindow, not
 611 // including the edges next to the sash.
 612 void wxSplitterWindow::SizeWindows()
 613 {
 614     int w, h;
 615     GetClientSize(&w, &h);
 616
 617     if ( m_windowOne && !m_windowTwo )
 618     {
 619         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 620
 621     }
 622     else if ( m_windowOne && m_windowTwo )
 623     {
 624         if (m_splitMode == wxSPLIT_VERTICAL)
 625         {
 626             int x1 = m_borderSize;
 627             int y1 = m_borderSize;
 628             int w1 = m_sashPosition - m_borderSize;
 629             int h1 = h - 2*m_borderSize;
 630
 631             int x2 = m_sashPosition + m_sashSize;
 632             int y2 = m_borderSize;
 633             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 634             int h2 = h - 2*m_borderSize;
 635
 636             m_windowOne->SetSize(x1, y1, w1, h1);
 637             m_windowTwo->SetSize(x2, y2, w2, h2);
 638
 639         }
 640         else
 641         {
 642             m_windowOne->SetSize(m_borderSize, m_borderSize,
 643                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 644             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 645                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 646
 647         }
 648     }
 649     wxClientDC dc(this);
 650     if ( m_borderSize > 0 )
 651         DrawBorders(dc);
 652     DrawSash(dc);
 653 }
 654
 655 // Set pane for unsplit window
 656 void wxSplitterWindow::Initialize(wxWindow *window)
 657 {
 658     m_windowOne = window;
 659     m_windowTwo = (wxWindow *) NULL;
 660     m_sashPosition = 0;
 661 }
 662
 663 // Associates the given window with window 2, drawing the appropriate sash
 664 // and changing the split mode.
 665 // Does nothing and returns FALSE if the window is already split.
 666 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 667 {
 668     if ( IsSplit() )
 669         return FALSE;
 670
 671     int w, h;
 672     GetClientSize(&w, &h);
 673
 674     m_splitMode = wxSPLIT_VERTICAL;
 675     m_windowOne = window1;
 676     m_windowTwo = window2;
 677     if ( sashPosition > 0 )
 678         m_sashPosition = sashPosition;
 679     else if ( sashPosition < 0 )
 680         m_sashPosition = w - sashPosition;
 681     else    // default
 682         m_sashPosition = w/2;
 683
 684     SizeWindows();
 685
 686     return TRUE;
 687 }
 688
 689 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 690 {
 691     if ( IsSplit() )
 692         return FALSE;
 693
 694     int w, h;
 695     GetClientSize(&w, &h);
 696
 697     m_splitMode = wxSPLIT_HORIZONTAL;
 698     m_windowOne = window1;
 699     m_windowTwo = window2;
 700     if ( sashPosition > 0 )
 701         m_sashPosition = sashPosition;
 702     else if ( sashPosition < 0 )
 703         m_sashPosition = h - sashPosition;
 704     else    // default
 705         m_sashPosition = h/2;
 706
 707     SizeWindows();
 708
 709     return TRUE;
 710 }
 711
 712
 713 // Remove the specified (or second) window from the view
 714 // Doesn't actually delete the window.
 715 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 716 {
 717     if ( ! IsSplit() )
 718         return FALSE;
 719
 720     wxWindow *win = NULL;
 721     if ( toRemove == NULL || toRemove == m_windowTwo)
 722     {
 723         win = m_windowTwo ;
 724         m_windowTwo = (wxWindow *) NULL;
 725     }
 726     else if ( toRemove == m_windowOne )
 727     {
 728         win = m_windowOne ;
 729         m_windowOne = m_windowTwo;
 730         m_windowTwo = (wxWindow *) NULL;
 731     }
 732     else
 733     {
 734         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 735
 736         return FALSE;
 737     }
 738
 739     SendUnsplitEvent(win);
 740     m_sashPosition = 0;
 741     SizeWindows();
 742
 743     return TRUE;
 744 }
 745
 746 // Replace a window with another one
 747 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 748 {
 749     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 750     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 751
 752     if ( winOld == m_windowTwo )
 753     {
 754         m_windowTwo = winNew;
 755     }
 756     else if ( winOld == m_windowOne )
 757     {
 758         m_windowOne = winNew;
 759     }
 760     else
 761     {
 762         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 763
 764         return FALSE;
 765     }
 766
 767     SizeWindows();
 768
 769     return TRUE;
 770 }
 771
 772 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 773 {
 774     m_sashPosition = position;
 775
 776     if ( redraw )
 777     {
 778         SizeWindows();
 779     }
 780 }
 781
 782 // Initialize colours
 783 void wxSplitterWindow::InitColours()
 784 {
 785     wxDELETE( m_facePen );
 786     wxDELETE( m_faceBrush );
 787     wxDELETE( m_mediumShadowPen );
 788     wxDELETE( m_darkShadowPen );
 789     wxDELETE( m_lightShadowPen );
 790     wxDELETE( m_hilightPen );
 791
 792     // Shadow colours
 793 #if defined(__WIN95__)
 794     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 795     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 796     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 797
 798     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 799     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 800
 801     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 802     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 803
 804     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 805     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 806
 807     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 808     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 809 #else // !Win32
 810     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 811     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 812     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 813     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 814     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 815     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 816 #endif // Win32/!Win32
 817 }
 818
 819 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 820 {
 821     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 822     event.m_data.win = winRemoved;
 823
 824     (void)GetEventHandler()->ProcessEvent(event);
 825 }
 826
 827 // ---------------------------------------------------------------------------
 828 // splitter event handlers
 829 // ---------------------------------------------------------------------------
 830
 831 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 832 {
 833     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 834     const int UNSPLIT_THRESHOLD = 4;
 835
 836     int newSashPosition = event.GetSashPosition();
 837
 838     // Obtain relevant window dimension for bottom / right threshold check
 839     int w, h;
 840     GetClientSize(&w, &h);
 841     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 842
 843     bool unsplit_scenario = FALSE;
 844     if ( m_permitUnsplitAlways
 845             || m_minimumPaneSize == 0 )
 846     {
 847         // Do edge detection if unsplit premitted
 848         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 849         {
 850             // threshold top / left check
 851             newSashPosition = 0;
 852             unsplit_scenario = TRUE;
 853         }
 854         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 855         {
 856             // threshold bottom/right check
 857             newSashPosition = window_size;
 858             unsplit_scenario = TRUE;
 859         }
 860     }
 861
 862     if ( !unsplit_scenario )
 863     {
 864         // If resultant pane would be too small, enlarge it
 865         if ( newSashPosition < m_minimumPaneSize )
 866             newSashPosition = m_minimumPaneSize;
 867         if ( newSashPosition > window_size - m_minimumPaneSize )
 868             newSashPosition = window_size - m_minimumPaneSize;
 869     }
 870
 871     // If the result is out of bounds it means minimum size is too big,
 872     // so split window in half as best compromise.
 873     if ( newSashPosition < 0 || newSashPosition > window_size )
 874         newSashPosition = window_size / 2;
 875
 876     // for compatibility, call the virtual function
 877     if ( !OnSashPositionChange(newSashPosition) )
 878     {
 879         newSashPosition = -1;
 880     }
 881
 882     event.SetSashPosition(newSashPosition);
 883 }
 884
 885 // Called when the sash is double-clicked. The default behaviour is to remove
 886 // the sash if the minimum pane size is zero.
 887 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 888 {
 889     // for compatibility, call the virtual function
 890     OnDoubleClickSash(event.GetX(), event.GetY());
 891
 892     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 893     {
 894         Unsplit();
 895     }
 896 }
 897
 898 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 899 {
 900     wxWindow *win = event.GetWindowBeingRemoved();
 901
 902     // do it before calling OnUnsplit() which may delete the window
 903     win->Show(FALSE);
 904
 905     // for compatibility, call the virtual function
 906     OnUnsplit(win);
 907 }