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