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