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     return FALSE;
 429 }
 430
 431 // Draw 3D effect borders
 432 void wxSplitterWindow::DrawBorders(wxDC& dc)
 433 {
 434     int w, h;
 435     GetClientSize(&w, &h);
 436
 437     if ( GetWindowStyleFlag() & wxSP_3D )
 438     {
 439
 440         dc.SetPen(*m_facePen);
 441         dc.SetBrush(*m_faceBrush);
 442         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 443         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 444         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 445         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 446
 447         dc.SetPen(*m_mediumShadowPen);
 448         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 449         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 450
 451         dc.SetPen(*m_darkShadowPen);
 452         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 453         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 454
 455         dc.SetPen(*m_hilightPen);
 456         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 457         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.
 458                                      /// Anyway, h is required for MSW.
 459
 460         dc.SetPen(*m_lightShadowPen);
 461         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 462         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 463     }
 464     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 465     {
 466         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 467         dc.SetPen(*wxBLACK_PEN);
 468         dc.DrawRectangle(0, 0, w-1, h-1);
 469     }
 470
 471     dc.SetPen(wxNullPen);
 472     dc.SetBrush(wxNullBrush);
 473 }
 474
 475 // Draw the sash
 476 void wxSplitterWindow::DrawSash(wxDC& dc)
 477 {
 478     if ( m_sashPosition == 0 || !m_windowTwo)
 479         return;
 480
 481     int w, h;
 482     GetClientSize(&w, &h);
 483
 484     if ( GetWindowStyleFlag() & wxSP_3D )
 485     {
 486         if ( m_splitMode == wxSPLIT_VERTICAL )
 487         {
 488             dc.SetPen(*m_facePen);
 489             dc.SetBrush(*m_faceBrush);
 490             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 491
 492             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 493
 494             dc.SetPen(*m_lightShadowPen);
 495                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 496             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 497
 498             dc.SetPen(*m_hilightPen);
 499             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 500
 501             dc.SetPen(*m_mediumShadowPen);
 502                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 503             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 504
 505             dc.SetPen(*m_darkShadowPen);
 506             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 507         }
 508         else
 509         {
 510             dc.SetPen(*m_facePen);
 511             dc.SetBrush(*m_faceBrush);
 512             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 513
 514             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 515
 516             dc.SetPen(*m_lightShadowPen);
 517             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 518
 519             dc.SetPen(*m_hilightPen);
 520             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 521
 522             dc.SetPen(*m_mediumShadowPen);
 523             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 524
 525             dc.SetPen(*m_darkShadowPen);
 526             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 527         }
 528     }
 529     else
 530     {
 531         if ( m_splitMode == wxSPLIT_VERTICAL )
 532         {
 533             dc.SetPen(*wxBLACK_PEN);
 534             dc.SetBrush(*wxBLACK_BRUSH);
 535             int h1 = h-1;
 536             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 537                 h1 += 1; // Not sure why this is necessary...
 538             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 539         }
 540         else
 541         {
 542             dc.SetPen(*wxBLACK_PEN);
 543             dc.SetBrush(*wxBLACK_BRUSH);
 544             int w1 = w-1;
 545             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 546                 w1 ++;
 547
 548             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 549         }
 550
 551     }
 552
 553     dc.SetPen(wxNullPen);
 554     dc.SetBrush(wxNullBrush);
 555 }
 556
 557 // Draw the sash tracker (for whilst moving the sash)
 558 void wxSplitterWindow::DrawSashTracker(int x, int y)
 559 {
 560     int w, h;
 561     GetClientSize(&w, &h);
 562
 563     wxScreenDC screenDC;
 564     int x1, y1;
 565     int x2, y2;
 566
 567     if ( m_splitMode == wxSPLIT_VERTICAL )
 568     {
 569         x1 = x; y1 = 2;
 570         x2 = x; y2 = h-2;
 571
 572         if ( x1 > w )
 573         {
 574             x1 = w; x2 = w;
 575         }
 576         else if ( x1 < 0 )
 577         {
 578             x1 = 0; x2 = 0;
 579         }
 580     }
 581     else
 582     {
 583         x1 = 2; y1 = y;
 584         x2 = w-2; y2 = y;
 585
 586         if ( y1 > h )
 587         {
 588             y1 = h;
 589             y2 = h;
 590         }
 591         else if ( y1 < 0 )
 592         {
 593             y1 = 0;
 594             y2 = 0;
 595         }
 596     }
 597
 598     ClientToScreen(&x1, &y1);
 599     ClientToScreen(&x2, &y2);
 600
 601     screenDC.SetLogicalFunction(wxINVERT);
 602     screenDC.SetPen(*m_sashTrackerPen);
 603     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 604
 605     screenDC.DrawLine(x1, y1, x2, y2);
 606
 607     screenDC.SetLogicalFunction(wxCOPY);
 608
 609     screenDC.SetPen(wxNullPen);
 610     screenDC.SetBrush(wxNullBrush);
 611 }
 612
 613 // Position and size subwindows.
 614 // Note that the border size applies to each subwindow, not
 615 // including the edges next to the sash.
 616 void wxSplitterWindow::SizeWindows()
 617 {
 618     int w, h;
 619     GetClientSize(&w, &h);
 620
 621     if ( m_windowOne && !m_windowTwo )
 622     {
 623         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 624
 625     }
 626     else if ( m_windowOne && m_windowTwo )
 627     {
 628         if (m_splitMode == wxSPLIT_VERTICAL)
 629         {
 630             int x1 = m_borderSize;
 631             int y1 = m_borderSize;
 632             int w1 = m_sashPosition - m_borderSize;
 633             int h1 = h - 2*m_borderSize;
 634
 635             int x2 = m_sashPosition + m_sashSize;
 636             int y2 = m_borderSize;
 637             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 638             int h2 = h - 2*m_borderSize;
 639
 640             m_windowOne->SetSize(x1, y1, w1, h1);
 641             m_windowTwo->SetSize(x2, y2, w2, h2);
 642
 643         }
 644         else
 645         {
 646             m_windowOne->SetSize(m_borderSize, m_borderSize,
 647                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 648             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 649                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 650
 651         }
 652     }
 653     wxClientDC dc(this);
 654         if ( m_borderSize > 0 )
 655                 DrawBorders(dc);
 656     DrawSash(dc);
 657 }
 658
 659 // Set pane for unsplit window
 660 void wxSplitterWindow::Initialize(wxWindow *window)
 661 {
 662     m_windowOne = window;
 663     m_windowTwo = (wxWindow *) NULL;
 664     m_sashPosition = 0;
 665 }
 666
 667 // Associates the given window with window 2, drawing the appropriate sash
 668 // and changing the split mode.
 669 // Does nothing and returns FALSE if the window is already split.
 670 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 671 {
 672     if ( IsSplit() )
 673         return FALSE;
 674
 675     int w, h;
 676     GetClientSize(&w, &h);
 677
 678     m_splitMode = wxSPLIT_VERTICAL;
 679     m_windowOne = window1;
 680     m_windowTwo = window2;
 681     if ( sashPosition > 0 )
 682         m_sashPosition = sashPosition;
 683     else if ( sashPosition < 0 )
 684         m_sashPosition = w - sashPosition;
 685     else    // default
 686         m_sashPosition = w/2;
 687
 688     SizeWindows();
 689
 690     return TRUE;
 691 }
 692
 693 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 694 {
 695     if ( IsSplit() )
 696         return FALSE;
 697
 698     int w, h;
 699     GetClientSize(&w, &h);
 700
 701     m_splitMode = wxSPLIT_HORIZONTAL;
 702     m_windowOne = window1;
 703     m_windowTwo = window2;
 704     if ( sashPosition > 0 )
 705         m_sashPosition = sashPosition;
 706     else if ( sashPosition < 0 )
 707         m_sashPosition = h - sashPosition;
 708     else    // default
 709         m_sashPosition = h/2;
 710
 711     SizeWindows();
 712
 713     return TRUE;
 714 }
 715
 716
 717 // Remove the specified (or second) window from the view
 718 // Doesn't actually delete the window.
 719 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 720 {
 721     if ( ! IsSplit() )
 722         return FALSE;
 723
 724     wxWindow *win = NULL;
 725     if ( toRemove == NULL || toRemove == m_windowTwo)
 726     {
 727         win = m_windowTwo ;
 728         m_windowTwo = (wxWindow *) NULL;
 729     }
 730     else if ( toRemove == m_windowOne )
 731     {
 732         win = m_windowOne ;
 733         m_windowOne = m_windowTwo;
 734         m_windowTwo = (wxWindow *) NULL;
 735     }
 736     else
 737     {
 738         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 739
 740         return FALSE;
 741     }
 742
 743     SendUnsplitEvent(win);
 744     m_sashPosition = 0;
 745     SizeWindows();
 746
 747     return TRUE;
 748 }
 749
 750 // Replace a window with another one
 751 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 752 {
 753     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 754     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 755
 756     if ( winOld == m_windowTwo )
 757     {
 758         m_windowTwo = winNew;
 759     }
 760     else if ( winOld == m_windowOne )
 761     {
 762         m_windowOne = winNew;
 763     }
 764     else
 765     {
 766         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 767
 768         return FALSE;
 769     }
 770
 771     SizeWindows();
 772
 773     return TRUE;
 774 }
 775
 776 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 777 {
 778     m_sashPosition = position;
 779
 780     if ( redraw )
 781     {
 782         SizeWindows();
 783     }
 784 }
 785
 786 // Initialize colours
 787 void wxSplitterWindow::InitColours()
 788 {
 789     wxDELETE( m_facePen );
 790     wxDELETE( m_faceBrush );
 791     wxDELETE( m_mediumShadowPen );
 792     wxDELETE( m_darkShadowPen );
 793     wxDELETE( m_lightShadowPen );
 794     wxDELETE( m_hilightPen );
 795
 796     // Shadow colours
 797 #if defined(__WIN95__)
 798     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 799     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 800     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 801
 802     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 803     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 804
 805     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 806     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 807
 808     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 809     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 810
 811     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 812     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 813 #else // !Win32
 814     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 815     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 816     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 817     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 818     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 819     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 820 #endif // Win32/!Win32
 821 }
 822
 823 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 824 {
 825     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 826     event.m_data.win = winRemoved;
 827
 828     (void)GetEventHandler()->ProcessEvent(event);
 829 }
 830
 831 // ---------------------------------------------------------------------------
 832 // splitter event handlers
 833 // ---------------------------------------------------------------------------
 834
 835 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 836 {
 837     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 838     const int UNSPLIT_THRESHOLD = 4;
 839
 840     int newSashPosition = event.GetSashPosition();
 841
 842     // Obtain relevant window dimension for bottom / right threshold check
 843     int w, h;
 844     GetClientSize(&w, &h);
 845     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 846
 847     bool unsplit_scenario = FALSE;
 848     if ( m_permitUnsplitAlways
 849             || m_minimumPaneSize == 0 )
 850     {
 851         // Do edge detection if unsplit premitted
 852         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 853         {
 854             // threshold top / left check
 855             newSashPosition = 0;
 856             unsplit_scenario = TRUE;
 857         }
 858         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 859         {
 860             // threshold bottom/right check
 861             newSashPosition = window_size;
 862             unsplit_scenario = TRUE;
 863         }
 864     }
 865
 866     if ( !unsplit_scenario )
 867     {
 868         // If resultant pane would be too small, enlarge it
 869         if ( newSashPosition < m_minimumPaneSize )
 870             newSashPosition = m_minimumPaneSize;
 871         if ( newSashPosition > window_size - m_minimumPaneSize )
 872             newSashPosition = window_size - m_minimumPaneSize;
 873     }
 874
 875     // If the result is out of bounds it means minimum size is too big,
 876     // so split window in half as best compromise.
 877     if ( newSashPosition < 0 || newSashPosition > window_size )
 878         newSashPosition = window_size / 2;
 879
 880     // for compatibility, call the virtual function
 881     if ( !OnSashPositionChange(newSashPosition) )
 882     {
 883         newSashPosition = -1;
 884     }
 885
 886     event.SetSashPosition(newSashPosition);
 887 }
 888
 889 // Called when the sash is double-clicked. The default behaviour is to remove
 890 // the sash if the minimum pane size is zero.
 891 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 892 {
 893     // for compatibility, call the virtual function
 894     OnDoubleClickSash(event.GetX(), event.GetY());
 895
 896     if ( GetMinimumPaneSize() == 0
 897         || m_permitUnsplitAlways)
 898     {
 899         Unsplit();
 900     }
 901 }
 902
 903 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 904 {
 905     wxWindow *win = event.GetWindowBeingRemoved();
 906
 907     // for compatibility, call the virtual function
 908     OnUnsplit(win);
 909
 910     win->Show(FALSE);
 911 }