src/generic/splitter.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/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
   9 // Licence:     wxWindows licence
  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/string.h"
  25     #include "wx/utils.h"
  26     #include "wx/log.h"
  27
  28     #include "wx/dcscreen.h"
  29
  30     #include "wx/window.h"
  31     #include "wx/dialog.h"
  32     #include "wx/frame.h"
  33
  34     #include "wx/settings.h"
  35 #endif
  36
  37 #include "wx/splitter.h"
  38
  39 #include <stdlib.h>
  40
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED)
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_UNSPLIT)
  45
  46 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  47 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxNotifyEvent)
  48
  49 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  50     EVT_PAINT(wxSplitterWindow::OnPaint)
  51     EVT_SIZE(wxSplitterWindow::OnSize)
  52     EVT_IDLE(wxSplitterWindow::OnIdle)
  53     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  54
  55 #if defined( __WXMSW__ ) || defined( __WXMAC__)
  56     EVT_SET_CURSOR(wxSplitterWindow::OnSetCursor)
  57 #endif // wxMSW
  58
  59     WX_EVENT_TABLE_CONTROL_CONTAINER(wxSplitterWindow)
  60 END_EVENT_TABLE()
  61
  62 WX_DELEGATE_TO_CONTROL_CONTAINER(wxSplitterWindow);
  63
  64 bool wxSplitterWindow::Create(wxWindow *parent, wxWindowID id,
  65                                    const wxPoint& pos,
  66                                    const wxSize& size,
  67                                    long style,
  68                                    const wxString& name)
  69 {
  70     // allow TABbing from one window to the other
  71     style |= wxTAB_TRAVERSAL;
  72
  73     if (!wxWindow::Create(parent, id, pos, size, style, name))
  74         return FALSE;
  75
  76     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  77
  78     if ( style & wxSP_3DSASH )
  79         m_sashSize = 7;
  80     else
  81         m_sashSize = 3;
  82
  83     if ( style & wxSP_3DBORDER )
  84         m_borderSize = 2;
  85     else if ( style & wxSP_BORDER )
  86         m_borderSize = 1;
  87     else
  88         m_borderSize = 0;
  89
  90 #ifdef __WXMAC__
  91     int major,minor;
  92     wxGetOsVersion( &major, &minor );
  93     if (major >= 10)
  94         m_windowStyle |= wxSP_SASH_AQUA;
  95 #endif
  96
  97     return TRUE;
  98 }
  99
 100 void wxSplitterWindow::Init()
 101 {
 102     m_container.SetContainerWindow(this);
 103
 104     m_splitMode = wxSPLIT_VERTICAL;
 105     m_permitUnsplitAlways = TRUE;
 106     m_windowOne = (wxWindow *) NULL;
 107     m_windowTwo = (wxWindow *) NULL;
 108     m_dragMode = wxSPLIT_DRAG_NONE;
 109     m_oldX = 0;
 110     m_oldY = 0;
 111     m_firstX = 0;
 112     m_firstY = 0;
 113     m_sashSize = 3;
 114     m_borderSize = 0;
 115     m_sashPosition = m_requestedSashPosition = 0;
 116     m_minimumPaneSize = 0;
 117     m_sashCursorWE = wxCursor(wxCURSOR_SIZEWE);
 118     m_sashCursorNS = wxCursor(wxCURSOR_SIZENS);
 119     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 120     m_lightShadowPen = (wxPen *) NULL;
 121     m_mediumShadowPen = (wxPen *) NULL;
 122     m_darkShadowPen = (wxPen *) NULL;
 123     m_faceBrush = (wxBrush *) NULL;
 124     m_facePen = (wxPen *) NULL;
 125     m_hilightPen = (wxPen *) NULL;
 126
 127     InitColours();
 128
 129     m_needUpdating = FALSE;
 130 }
 131
 132 wxSplitterWindow::~wxSplitterWindow()
 133 {
 134     delete m_sashTrackerPen;
 135     delete m_lightShadowPen;
 136     delete m_darkShadowPen;
 137     delete m_mediumShadowPen;
 138     delete m_hilightPen;
 139     delete m_facePen;
 140     delete m_faceBrush;
 141 }
 142
 143 void wxSplitterWindow::SetResizeCursor()
 144 {
 145     SetCursor(m_splitMode == wxSPLIT_VERTICAL ? m_sashCursorWE
 146                                               : m_sashCursorNS);
 147 }
 148
 149 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 150 {
 151     wxPaintDC dc(this);
 152
 153     if ( m_borderSize > 0 )
 154         DrawBorders(dc);
 155     DrawSash(dc);
 156 }
 157
 158 void wxSplitterWindow::OnIdle(wxIdleEvent& event)
 159 {
 160     if (m_needUpdating)
 161         SizeWindows();
 162
 163     event.Skip();
 164 }
 165
 166 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 167 {
 168     int x = (int)event.GetX(),
 169         y = (int)event.GetY();
 170
 171     // reset the cursor
 172 #if defined( __WXMOTIF__ ) || defined( __WXGTK__ ) || defined( __WXMAC__ )
 173     SetCursor(* wxSTANDARD_CURSOR);
 174 #elif defined(__WXMSW__)
 175     SetCursor(wxCursor());
 176 #endif
 177
 178     if (GetWindowStyle() & wxSP_NOSASH)
 179         return;
 180
 181     // with wxSP_LIVE_UPDATE style the splitter windows are always resized
 182     // following the mouse movement while it drags the sash, without it we only
 183     // draw the sash at the new position but only resize the windows when the
 184     // dragging is finished
 185     bool isLive = (GetWindowStyleFlag() & wxSP_LIVE_UPDATE) != 0;
 186
 187     if (event.LeftDown())
 188     {
 189         if ( SashHitTest(x, y) )
 190         {
 191             CaptureMouse();
 192
 193             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 194
 195             if ( !isLive )
 196             {
 197                 // remember the initial sash position and draw the initial
 198                 // shadow sash
 199                 m_sashPositionCurrent = m_sashPosition;
 200
 201                 DrawSashTracker(x, y);
 202             }
 203
 204             m_oldX = x;
 205             m_oldY = y;
 206
 207             SetResizeCursor();
 208             return;
 209         }
 210     }
 211     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 212     {
 213         // We can stop dragging now and see what we've got.
 214         m_dragMode = wxSPLIT_DRAG_NONE;
 215         ReleaseMouse();
 216
 217         // exit if unsplit after doubleclick
 218         if ( !IsSplit() )
 219         {
 220             return;
 221         }
 222
 223         // Erase old tracker
 224         if ( !isLive )
 225         {
 226             DrawSashTracker(m_oldX, m_oldY);
 227         }
 228
 229         // the position of the click doesn't exactly correspond to
 230         // m_sashPosition, rather it changes it by the distance by which the
 231         // mouse has moved
 232         int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
 233
 234         int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
 235         int posSashNew = OnSashPositionChanging(posSashOld + diff);
 236         if ( posSashNew == -1 )
 237         {
 238             // change not allowed
 239             return;
 240         }
 241
 242         if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 243         {
 244             // Deal with possible unsplit scenarios
 245             if ( posSashNew == 0 )
 246             {
 247                 // We remove the first window from the view
 248                 wxWindow *removedWindow = m_windowOne;
 249                 m_windowOne = m_windowTwo;
 250                 m_windowTwo = (wxWindow *) NULL;
 251                 OnUnsplit(removedWindow);
 252                 SetSashPositionAndNotify(0);
 253             }
 254             else if ( posSashNew == GetWindowSize() )
 255             {
 256                 // We remove the second window from the view
 257                 wxWindow *removedWindow = m_windowTwo;
 258                 m_windowTwo = (wxWindow *) NULL;
 259                 OnUnsplit(removedWindow);
 260                 SetSashPositionAndNotify(0);
 261             }
 262             else
 263             {
 264                 SetSashPositionAndNotify(posSashNew);
 265             }
 266         }
 267         else
 268         {
 269             SetSashPositionAndNotify(posSashNew);
 270         }
 271
 272         SizeWindows();
 273     }  // left up && dragging
 274     else if (event.Moving() && !event.Dragging())
 275     {
 276         // Just change the cursor if required
 277         if ( SashHitTest(x, y) )
 278         {
 279             SetResizeCursor();
 280         }
 281 #if defined(__WXGTK__) || defined(__WXMSW__) || defined(__WXMAC__)
 282         else
 283         {
 284             // We must set the normal cursor in MSW, because
 285             // if the child window doesn't have a cursor, the
 286             // parent's (splitter window) will be used, and this
 287             // must be the standard cursor.
 288
 289             // where else do we unset the cursor?
 290             SetCursor(* wxSTANDARD_CURSOR);
 291         }
 292 #endif // __WXGTK__
 293     }
 294     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 295     {
 296 #if defined( __WXMSW__ ) || defined( __WXMAC__ )
 297         // Otherwise, the cursor sometimes reverts to the normal cursor
 298         // during dragging.
 299         SetResizeCursor();
 300 #endif // __WXMSW__
 301
 302         int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
 303         if ( !diff )
 304         {
 305             // nothing to do, mouse didn't really move far enough
 306             return;
 307         }
 308
 309         int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
 310         int posSashNew = OnSashPositionChanging(posSashOld + diff);
 311         if ( posSashNew == -1 )
 312         {
 313             // change not allowed
 314             return;
 315         }
 316
 317         if ( posSashNew == m_sashPosition )
 318             return;
 319
 320         // Erase old tracker
 321         if ( !isLive )
 322         {
 323             DrawSashTracker(m_oldX, m_oldY);
 324         }
 325
 326         if (m_splitMode == wxSPLIT_VERTICAL)
 327             x = posSashNew;
 328         else
 329             y = posSashNew;
 330
 331         // Remember old positions
 332         m_oldX = x;
 333         m_oldY = y;
 334
 335 #ifdef __WXMSW__
 336         // As we captured the mouse, we may get the mouse events from outside
 337         // our window - for example, negative values in x, y. This has a weird
 338         // consequence under MSW where we use unsigned values sometimes and
 339         // signed ones other times: the coordinates turn as big positive
 340         // numbers and so the sash is drawn on the *right* side of the window
 341         // instead of the left (or bottom instead of top). Correct this.
 342         if ( (short)m_oldX < 0 )
 343             m_oldX = 0;
 344         if ( (short)m_oldY < 0 )
 345             m_oldY = 0;
 346 #endif // __WXMSW__
 347
 348         // Draw new one
 349         if ( !isLive )
 350         {
 351             m_sashPositionCurrent = posSashNew;
 352
 353             DrawSashTracker(m_oldX, m_oldY);
 354         }
 355         else
 356         {
 357             SetSashPositionAndNotify(posSashNew);
 358             m_needUpdating = TRUE;
 359         }
 360     }
 361     else if ( event.LeftDClick() )
 362     {
 363         OnDoubleClickSash(x, y);
 364     }
 365 }
 366
 367 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 368 {
 369     // only process this message if we're not iconized - otherwise iconizing
 370     // and restoring a window containing the splitter has a funny side effect
 371     // of changing the splitter position!
 372     wxWindow *parent = GetParent();
 373     while ( parent && !parent->IsTopLevel() )
 374     {
 375         parent = parent->GetParent();
 376     }
 377
 378     bool iconized = FALSE;
 379
 380     // wxMotif doesn't yet have a wxTopLevelWindow implementation
 381 #ifdef __WXMOTIF__
 382     wxFrame *winTop = wxDynamicCast(parent, wxFrame);
 383 #else
 384     wxTopLevelWindow *winTop = wxDynamicCast(parent, wxTopLevelWindow);
 385 #endif
 386     if ( winTop )
 387     {
 388         iconized = winTop->IsIconized();
 389     }
 390 #ifndef __WXMOTIF__
 391     else
 392     {
 393         wxFAIL_MSG(wxT("should have a top level parent!"));
 394
 395         iconized = FALSE;
 396     }
 397 #endif
 398
 399     if ( iconized )
 400     {
 401         event.Skip();
 402
 403         return;
 404     }
 405
 406     int cw, ch;
 407     GetClientSize( &cw, &ch );
 408     if ( m_windowTwo )
 409     {
 410         if ( m_splitMode == wxSPLIT_VERTICAL )
 411         {
 412             if ( m_sashPosition >= (cw - 5) )
 413                 SetSashPositionAndNotify(wxMax(10, cw - 40));
 414         }
 415         else // m_splitMode == wxSPLIT_HORIZONTAL
 416         {
 417             if ( m_sashPosition >= (ch - 5) )
 418                 SetSashPositionAndNotify(wxMax(10, ch - 40));
 419         }
 420     }
 421
 422     SizeWindows();
 423 }
 424
 425 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 426 {
 427     if ( m_windowTwo == NULL || m_sashPosition == 0)
 428         return FALSE; // No sash
 429
 430     if ( m_splitMode == wxSPLIT_VERTICAL )
 431     {
 432         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 433             return TRUE;
 434         else
 435             return FALSE;
 436     }
 437     else
 438     {
 439         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 440             return TRUE;
 441         else
 442             return FALSE;
 443     }
 444 }
 445
 446 // Draw 3D effect borders
 447 void wxSplitterWindow::DrawBorders(wxDC& dc)
 448 {
 449     int w, h;
 450     GetClientSize(&w, &h);
 451
 452     if ( GetWindowStyleFlag() & wxSP_3DBORDER )
 453     {
 454
 455         dc.SetPen(*m_facePen);
 456         dc.SetBrush(*m_faceBrush);
 457         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 458         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 459         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 460         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 461
 462         dc.SetPen(*m_mediumShadowPen);
 463         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 464         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 465
 466         dc.SetPen(*m_darkShadowPen);
 467         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 468         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 469
 470         dc.SetPen(*m_hilightPen);
 471         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 472         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.
 473                                      /// Anyway, h is required for MSW.
 474
 475         dc.SetPen(*m_lightShadowPen);
 476         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 477         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 478     }
 479     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 480     {
 481         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 482         dc.SetPen(*wxBLACK_PEN);
 483         dc.DrawRectangle(0, 0, w-1, h-1);
 484     }
 485
 486     dc.SetPen(wxNullPen);
 487     dc.SetBrush(wxNullBrush);
 488 }
 489
 490 // Draw the sash
 491 void wxSplitterWindow::DrawSash(wxDC& dc)
 492 {
 493     if ( m_sashPosition == 0 || !m_windowTwo)
 494         return;
 495     if (GetWindowStyle() & wxSP_NOSASH)
 496         return;
 497
 498     int w, h;
 499     GetClientSize(&w, &h);
 500
 501     if ( GetWindowStyleFlag() & wxSP_3DSASH )
 502     {
 503         if ( m_splitMode == wxSPLIT_VERTICAL )
 504         {
 505             dc.SetPen(*m_facePen);
 506
 507             if (HasFlag( wxSP_SASH_AQUA ))
 508                 dc.SetBrush(*wxWHITE_BRUSH);
 509             else
 510                 dc.SetBrush(*m_faceBrush);
 511             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 512
 513             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 514
 515             dc.SetPen(*m_lightShadowPen);
 516             int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 517             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 518
 519             dc.SetPen(*m_hilightPen);
 520             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 521
 522             if (!HasFlag( wxSP_SASH_AQUA ))
 523                 dc.SetPen(*m_mediumShadowPen);
 524
 525             int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 526             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 527
 528             if (HasFlag( wxSP_SASH_AQUA ))
 529                 dc.SetPen(*m_lightShadowPen);
 530             else
 531                 dc.SetPen(*m_darkShadowPen);
 532             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 533
 534             // Draw the top and bottom edges of the sash, if requested
 535             if (GetWindowStyle() & wxSP_FULLSASH)
 536             {
 537                 // Top
 538                 dc.SetPen(*m_hilightPen);
 539                 dc.DrawLine(m_sashPosition+1, m_borderSize, m_sashPosition+m_sashSize-1, m_borderSize);
 540
 541                 // Bottom
 542                 dc.SetPen(*m_darkShadowPen);
 543                 dc.DrawLine(m_sashPosition+1, h-m_borderSize-1, m_sashPosition+m_sashSize-1, h-m_borderSize-1);
 544             }
 545         }
 546         else // wxSPLIT_HORIZONTAL
 547         {
 548             dc.SetPen(*m_facePen);
 549             if (HasFlag( wxSP_SASH_AQUA ))
 550                 dc.SetBrush(*wxWHITE_BRUSH);
 551             else
 552                 dc.SetBrush(*m_faceBrush);
 553             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 554
 555             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 556
 557             dc.SetPen(*m_lightShadowPen);
 558             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 559
 560             dc.SetPen(*m_hilightPen);
 561             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 562
 563             if (!HasFlag( wxSP_SASH_AQUA ))
 564                 dc.SetPen(*m_mediumShadowPen);
 565             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 566
 567             if (HasFlag( wxSP_SASH_AQUA ))
 568                 dc.SetPen(*m_lightShadowPen);
 569             else
 570                 dc.SetPen(*m_darkShadowPen);
 571             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 572
 573             // Draw the left and right edges of the sash, if requested
 574             if (GetWindowStyle() & wxSP_FULLSASH)
 575             {
 576                 // Left
 577                 dc.SetPen(*m_hilightPen);
 578                 dc.DrawLine(m_borderSize, m_sashPosition, m_borderSize, m_sashPosition+m_sashSize);
 579
 580                 // Right
 581                 dc.SetPen(*m_darkShadowPen);
 582                 dc.DrawLine(w-m_borderSize-1, m_sashPosition+1, w-m_borderSize-1, m_sashPosition+m_sashSize-1);
 583             }
 584         }
 585     }
 586     else // !wxSP_3DSASH
 587     {
 588         dc.SetPen(*wxTRANSPARENT_PEN);
 589         dc.SetBrush(*m_faceBrush);
 590         if ( m_splitMode == wxSPLIT_VERTICAL )
 591         {
 592             int h1 = h-1;
 593             int y1 = 0;
 594             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 595                 h1 += 1; // Not sure why this is necessary...
 596             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 597             {
 598                 y1 = 2; h1 -= 3;
 599             }
 600             dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 601         }
 602         else // wxSPLIT_HORIZONTAL
 603         {
 604             int w1 = w-1;
 605             int x1 = 0;
 606             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 607                 w1 ++;
 608             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 609             {
 610                 x1 = 2; w1 -= 3;
 611             }
 612             dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 613         }
 614     }
 615
 616     dc.SetPen(wxNullPen);
 617     dc.SetBrush(wxNullBrush);
 618 }
 619
 620 // Draw the sash tracker (for whilst moving the sash)
 621 void wxSplitterWindow::DrawSashTracker(int x, int y)
 622 {
 623     int w, h;
 624     GetClientSize(&w, &h);
 625
 626     wxScreenDC screenDC;
 627     int x1, y1;
 628     int x2, y2;
 629
 630     if ( m_splitMode == wxSPLIT_VERTICAL )
 631     {
 632         x1 = x; y1 = 2;
 633         x2 = x; y2 = h-2;
 634
 635         if ( x1 > w )
 636         {
 637             x1 = w; x2 = w;
 638         }
 639         else if ( x1 < 0 )
 640         {
 641             x1 = 0; x2 = 0;
 642         }
 643     }
 644     else
 645     {
 646         x1 = 2; y1 = y;
 647         x2 = w-2; y2 = y;
 648
 649         if ( y1 > h )
 650         {
 651             y1 = h;
 652             y2 = h;
 653         }
 654         else if ( y1 < 0 )
 655         {
 656             y1 = 0;
 657             y2 = 0;
 658         }
 659     }
 660
 661     ClientToScreen(&x1, &y1);
 662     ClientToScreen(&x2, &y2);
 663
 664     screenDC.SetLogicalFunction(wxINVERT);
 665     screenDC.SetPen(*m_sashTrackerPen);
 666     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 667
 668     screenDC.DrawLine(x1, y1, x2, y2);
 669
 670     screenDC.SetLogicalFunction(wxCOPY);
 671
 672     screenDC.SetPen(wxNullPen);
 673     screenDC.SetBrush(wxNullBrush);
 674 }
 675
 676 int wxSplitterWindow::GetWindowSize() const
 677 {
 678     wxSize size = GetClientSize();
 679
 680     return m_splitMode == wxSPLIT_VERTICAL ? size.x : size.y;
 681 }
 682
 683 int wxSplitterWindow::AdjustSashPosition(int sashPos) const
 684 {
 685     int window_size = GetWindowSize();
 686
 687     wxWindow *win;
 688
 689     win = GetWindow1();
 690     if ( win )
 691     {
 692         // the window shouldn't be smaller than its own minimal size nor
 693         // smaller than the minimual pane size specified for this splitter
 694         int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
 695                                                       : win->GetMinHeight();
 696
 697         if ( minSize == -1 || m_minimumPaneSize > minSize )
 698             minSize = m_minimumPaneSize;
 699
 700         minSize += GetBorderSize();
 701
 702         if ( sashPos < minSize )
 703             sashPos = minSize;
 704     }
 705
 706     win = GetWindow2();
 707     if ( win )
 708     {
 709         int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
 710                                                       : win->GetMinHeight();
 711
 712         if ( minSize == -1 || m_minimumPaneSize > minSize )
 713             minSize = m_minimumPaneSize;
 714
 715         int maxSize = window_size - minSize - GetBorderSize();
 716         if ( sashPos > maxSize )
 717             sashPos = maxSize;
 718     }
 719
 720     return sashPos;
 721 }
 722
 723 bool wxSplitterWindow::DoSetSashPosition(int sashPos)
 724 {
 725     int newSashPosition = AdjustSashPosition(sashPos);
 726
 727     if ( newSashPosition == m_sashPosition )
 728         return FALSE;
 729
 730     m_sashPosition = newSashPosition;
 731
 732     return TRUE;
 733 }
 734
 735 void wxSplitterWindow::SetSashPositionAndNotify(int sashPos)
 736 {
 737     if ( DoSetSashPosition(sashPos) )
 738     {
 739         wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED, this);
 740         event.m_data.pos = m_sashPosition;
 741
 742         (void)DoSendEvent(event);
 743     }
 744 }
 745
 746 // Position and size subwindows.
 747 // Note that the border size applies to each subwindow, not
 748 // including the edges next to the sash.
 749 void wxSplitterWindow::SizeWindows()
 750 {
 751     // check if we have delayed setting the real sash position
 752     if ( m_requestedSashPosition != INT_MAX )
 753     {
 754         int newSashPosition = ConvertSashPosition(m_requestedSashPosition);
 755         if ( newSashPosition != m_sashPosition )
 756         {
 757             DoSetSashPosition(newSashPosition);
 758         }
 759
 760         if ( newSashPosition <= m_sashPosition
 761             && newSashPosition >= m_sashPosition - GetBorderSize() )
 762         {
 763             // don't update it any more
 764             m_requestedSashPosition = INT_MAX;
 765         }
 766     }
 767
 768     int w, h;
 769     GetClientSize(&w, &h);
 770
 771     if ( GetWindow1() && !GetWindow2() )
 772     {
 773         GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 774                               w - 2*GetBorderSize(), h - 2*GetBorderSize());
 775     }
 776     else if ( GetWindow1() && GetWindow2() )
 777     {
 778         if (GetSplitMode() == wxSPLIT_VERTICAL)
 779         {
 780             int x1 = GetBorderSize();
 781             int y1 = GetBorderSize();
 782             int w1 = GetSashPosition() - GetBorderSize();
 783             int h1 = h - 2*GetBorderSize();
 784
 785             int x2 = GetSashPosition() + GetSashSize();
 786             int y2 = GetBorderSize();
 787             int w2 = w - 2*GetBorderSize() - GetSashSize() - w1;
 788             int h2 = h - 2*GetBorderSize();
 789
 790             GetWindow1()->SetSize(x1, y1, w1, h1);
 791             GetWindow2()->SetSize(x2, y2, w2, h2);
 792         }
 793         else
 794         {
 795             GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 796                 w - 2*GetBorderSize(), GetSashPosition() - GetBorderSize());
 797             GetWindow2()->SetSize(GetBorderSize(), GetSashPosition() + GetSashSize(),
 798                 w - 2*GetBorderSize(), h - 2*GetBorderSize() - GetSashSize() - (GetSashPosition() - GetBorderSize()));
 799         }
 800     }
 801     wxClientDC dc(this);
 802     if ( GetBorderSize() > 0 )
 803         DrawBorders(dc);
 804     DrawSash(dc);
 805
 806     SetNeedUpdating(FALSE);
 807 }
 808
 809 // Set pane for unsplit window
 810 void wxSplitterWindow::Initialize(wxWindow *window)
 811 {
 812     wxASSERT_MSG( window && window->GetParent() == this,
 813                   _T("windows in the splitter should have it as parent!") );
 814
 815     m_windowOne = window;
 816     m_windowTwo = (wxWindow *) NULL;
 817     DoSetSashPosition(0);
 818 }
 819
 820 // Associates the given window with window 2, drawing the appropriate sash
 821 // and changing the split mode.
 822 // Does nothing and returns FALSE if the window is already split.
 823 bool wxSplitterWindow::DoSplit(wxSplitMode mode,
 824                                wxWindow *window1, wxWindow *window2,
 825                                int sashPosition)
 826 {
 827     if ( IsSplit() )
 828         return FALSE;
 829
 830     wxCHECK_MSG( window1 && window2, FALSE,
 831                  _T("can not split with NULL window(s)") );
 832
 833     wxCHECK_MSG( window1->GetParent() == this && window2->GetParent() == this, FALSE,
 834                   _T("windows in the splitter should have it as parent!") );
 835
 836     m_splitMode = mode;
 837     m_windowOne = window1;
 838     m_windowTwo = window2;
 839
 840     // remember the sash position we want to set for later if we can't set it
 841     // right now (e.g. because the window is too small)
 842     m_requestedSashPosition = sashPosition;
 843
 844     DoSetSashPosition(ConvertSashPosition(sashPosition));
 845
 846     SizeWindows();
 847
 848     return TRUE;
 849 }
 850
 851 int wxSplitterWindow::ConvertSashPosition(int sashPosition) const
 852 {
 853     if ( sashPosition > 0 )
 854     {
 855         return sashPosition;
 856     }
 857     else if ( sashPosition < 0 )
 858     {
 859         // It's negative so adding is subtracting
 860         return GetWindowSize() + sashPosition;
 861     }
 862     else // sashPosition == 0
 863     {
 864         // default, put it in the centre
 865         return GetWindowSize() / 2;
 866     }
 867 }
 868
 869 // Remove the specified (or second) window from the view
 870 // Doesn't actually delete the window.
 871 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 872 {
 873     if ( ! IsSplit() )
 874         return FALSE;
 875
 876     wxWindow *win = NULL;
 877     if ( toRemove == NULL || toRemove == m_windowTwo)
 878     {
 879         win = m_windowTwo ;
 880         m_windowTwo = (wxWindow *) NULL;
 881     }
 882     else if ( toRemove == m_windowOne )
 883     {
 884         win = m_windowOne ;
 885         m_windowOne = m_windowTwo;
 886         m_windowTwo = (wxWindow *) NULL;
 887     }
 888     else
 889     {
 890         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 891
 892         return FALSE;
 893     }
 894
 895     OnUnsplit(win);
 896     DoSetSashPosition(0);
 897     SizeWindows();
 898
 899     return TRUE;
 900 }
 901
 902 // Replace a window with another one
 903 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 904 {
 905     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 906     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 907
 908     if ( winOld == m_windowTwo )
 909     {
 910         m_windowTwo = winNew;
 911     }
 912     else if ( winOld == m_windowOne )
 913     {
 914         m_windowOne = winNew;
 915     }
 916     else
 917     {
 918         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 919
 920         return FALSE;
 921     }
 922
 923     SizeWindows();
 924
 925     return TRUE;
 926 }
 927
 928 void wxSplitterWindow::SetMinimumPaneSize(int min)
 929 {
 930     m_minimumPaneSize = min;
 931     SetSashPosition(m_sashPosition); // re-check limits
 932 }
 933
 934 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 935 {
 936     DoSetSashPosition(position);
 937
 938     if ( redraw )
 939     {
 940         SizeWindows();
 941     }
 942 }
 943
 944 // Initialize colours
 945 void wxSplitterWindow::InitColours()
 946 {
 947     wxDELETE( m_facePen );
 948     wxDELETE( m_faceBrush );
 949     wxDELETE( m_mediumShadowPen );
 950     wxDELETE( m_darkShadowPen );
 951     wxDELETE( m_lightShadowPen );
 952     wxDELETE( m_hilightPen );
 953
 954     // Shadow colours
 955 #ifndef __WIN16__
 956     wxColour faceColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 957     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 958     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 959
 960     wxColour mediumShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW));
 961     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 962
 963     wxColour darkShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW));
 964     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 965
 966     wxColour lightShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT));
 967     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 968
 969     wxColour hilightColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT));
 970     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 971 #else
 972     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 973     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 974     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 975     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 976     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 977     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 978 #endif // __WIN16__
 979 }
 980
 981 bool wxSplitterWindow::DoSendEvent(wxSplitterEvent& event)
 982 {
 983     return !GetEventHandler()->ProcessEvent(event) || event.IsAllowed();
 984 }
 985
 986 // ---------------------------------------------------------------------------
 987 // wxSplitterWindow virtual functions: they now just generate the events
 988 // ---------------------------------------------------------------------------
 989
 990 bool wxSplitterWindow::OnSashPositionChange(int WXUNUSED(newSashPosition))
 991 {
 992     // always allow by default
 993     return TRUE;
 994 }
 995
 996 int wxSplitterWindow::OnSashPositionChanging(int newSashPosition)
 997 {
 998     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 999     const int UNSPLIT_THRESHOLD = 4;
1000
1001     // first of all, check if OnSashPositionChange() doesn't forbid this change
1002     if ( !OnSashPositionChange(newSashPosition) )
1003     {
1004         // it does
1005         return -1;
1006     }
1007
1008     // Obtain relevant window dimension for bottom / right threshold check
1009     int window_size = GetWindowSize();
1010
1011     bool unsplit_scenario = FALSE;
1012     if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
1013     {
1014         // Do edge detection if unsplit premitted
1015         if ( newSashPosition <= UNSPLIT_THRESHOLD )
1016         {
1017             // threshold top / left check
1018             newSashPosition = 0;
1019             unsplit_scenario = TRUE;
1020         }
1021         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
1022         {
1023             // threshold bottom/right check
1024             newSashPosition = window_size;
1025             unsplit_scenario = TRUE;
1026         }
1027     }
1028
1029     if ( !unsplit_scenario )
1030     {
1031         // If resultant pane would be too small, enlarge it
1032         newSashPosition = AdjustSashPosition(newSashPosition);
1033     }
1034
1035     // If the result is out of bounds it means minimum size is too big,
1036     // so split window in half as best compromise.
1037     if ( newSashPosition < 0 || newSashPosition > window_size )
1038         newSashPosition = window_size / 2;
1039
1040     // now let the event handler have it
1041     //
1042     // FIXME: shouldn't we do it before the adjustments above so as to ensure
1043     //        that the sash position is always reasonable?
1044     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING, this);
1045     event.m_data.pos = newSashPosition;
1046
1047     if ( !DoSendEvent(event) )
1048     {
1049         // the event handler vetoed the change
1050         newSashPosition = -1;
1051     }
1052     else
1053     {
1054         // it could have been changed by it
1055         newSashPosition = event.GetSashPosition();
1056     }
1057
1058     return newSashPosition;
1059 }
1060
1061 // Called when the sash is double-clicked. The default behaviour is to remove
1062 // the sash if the minimum pane size is zero.
1063 void wxSplitterWindow::OnDoubleClickSash(int x, int y)
1064 {
1065     // new code should handle events instead of using the virtual functions
1066     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED, this);
1067     event.m_data.pt.x = x;
1068     event.m_data.pt.y = y;
1069     if ( DoSendEvent(event) )
1070     {
1071         if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
1072         {
1073             Unsplit();
1074         }
1075     }
1076     //else: blocked by user
1077 }
1078
1079 void wxSplitterWindow::OnUnsplit(wxWindow *winRemoved)
1080 {
1081     // do it before calling the event handler which may delete the window
1082     winRemoved->Show(FALSE);
1083
1084     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
1085     event.m_data.win = winRemoved;
1086
1087     (void)DoSendEvent(event);
1088 }
1089
1090 #if defined( __WXMSW__ ) || defined( __WXMAC__)
1091
1092 // this is currently called (and needed) under MSW only...
1093 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& event)
1094 {
1095     // if we don't do it, the resizing cursor might be set for child window:
1096     // and like this we explicitly say that our cursor should not be used for
1097     // children windows which overlap us
1098
1099     if ( SashHitTest(event.GetX(), event.GetY()) )
1100     {
1101         // default processing is ok
1102         event.Skip();
1103     }
1104     //else: do nothing, in particular, don't call Skip()
1105 }
1106
1107 #endif // wxMSW
1108