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