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/wx.h"
  25 #endif
  26
  27 #include <stdlib.h>
  28
  29 #include "wx/string.h"
  30 #include "wx/splitter.h"
  31 #include "wx/dcscreen.h"
  32
  33 #if !USE_SHARED_LIBRARY
  34 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  35 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
  36
  37 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  38     EVT_PAINT(wxSplitterWindow::OnPaint)
  39     EVT_SIZE(wxSplitterWindow::OnSize)
  40     EVT_IDLE(wxSplitterWindow::OnIdle)
  41     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  42
  43     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  44     // NB: we borrow OnSashPosChanged for purposes of
  45     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  46     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  47     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  48     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  49 END_EVENT_TABLE()
  50 #endif
  51
  52 wxSplitterWindow::wxSplitterWindow()
  53 {
  54     m_splitMode = wxSPLIT_VERTICAL;
  55     m_permitUnsplitAlways = FALSE;
  56     m_windowOne = (wxWindow *) NULL;
  57     m_windowTwo = (wxWindow *) NULL;
  58     m_dragMode = wxSPLIT_DRAG_NONE;
  59     m_oldX = 0;
  60     m_oldY = 0;
  61     m_firstX = 0;
  62     m_firstY = 0;
  63     m_sashSize = 7;
  64     m_borderSize = 2;
  65     m_sashPosition = 0;
  66     m_sashCursorWE = (wxCursor *) NULL;
  67     m_sashCursorNS = (wxCursor *) NULL;
  68     m_sashTrackerPen = (wxPen *) NULL;
  69     m_lightShadowPen = (wxPen *) NULL;
  70     m_mediumShadowPen = (wxPen *) NULL;
  71     m_darkShadowPen = (wxPen *) NULL;
  72     m_faceBrush = (wxBrush *) NULL;
  73     m_facePen = (wxPen *) NULL;
  74     m_hilightPen = (wxPen *) NULL;
  75     m_minimumPaneSize = 0;
  76     m_needUpdating = FALSE;
  77 }
  78
  79 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  80                                    const wxPoint& pos,
  81                                    const wxSize& size,
  82                                    long style,
  83                                    const wxString& name)
  84                 : wxWindow(parent, id, pos, size, style, name)
  85 {
  86     m_splitMode = wxSPLIT_VERTICAL;
  87     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  88     m_windowOne = (wxWindow *) NULL;
  89     m_windowTwo = (wxWindow *) NULL;
  90     m_dragMode = wxSPLIT_DRAG_NONE;
  91     m_oldX = 0;
  92     m_oldY = 0;
  93     m_firstX = 0;
  94     m_firstY = 0;
  95     m_sashSize = 7;
  96     m_borderSize = 2;
  97     m_sashPosition = 0;
  98     m_minimumPaneSize = 0;
  99     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 100     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 101     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 102     m_lightShadowPen = (wxPen *) NULL;
 103     m_mediumShadowPen = (wxPen *) NULL;
 104     m_darkShadowPen = (wxPen *) NULL;
 105     m_faceBrush = (wxBrush *) NULL;
 106     m_facePen = (wxPen *) NULL;
 107     m_hilightPen = (wxPen *) NULL;
 108
 109     if ( style & wxSP_3D )
 110     {
 111         m_borderSize = 2;
 112         m_sashSize = 7;
 113     }
 114     else if ( style & wxSP_BORDER )
 115     {
 116         m_borderSize = 1;
 117         m_sashSize = 3;
 118     }
 119     else
 120     {
 121         m_borderSize = 0;
 122         m_sashSize = 3;
 123     }
 124
 125     // Eventually, we'll respond to colour change messages
 126     InitColours();
 127
 128     // For debugging purposes, to see the background.
 129 //    SetBackground(wxBLUE_BRUSH);
 130
 131     m_needUpdating = FALSE;
 132 }
 133
 134 wxSplitterWindow::~wxSplitterWindow()
 135 {
 136     delete m_sashCursorWE;
 137     delete m_sashCursorNS;
 138     delete m_sashTrackerPen;
 139     delete m_lightShadowPen;
 140     delete m_darkShadowPen;
 141     delete m_mediumShadowPen;
 142     delete m_hilightPen;
 143     delete m_facePen;
 144     delete m_faceBrush;
 145 }
 146
 147 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 148 {
 149     wxPaintDC dc(this);
 150
 151     if ( m_borderSize > 0 )
 152         DrawBorders(dc);
 153     DrawSash(dc);
 154 }
 155
 156 void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 157 {
 158     if (m_needUpdating)
 159         SizeWindows();
 160 }
 161
 162 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 163 {
 164     long x = event.GetX();
 165     long y = event.GetY();
 166
 167     // reset the cursor
 168 #ifdef __WXMOTIF__
 169     SetCursor(* wxSTANDARD_CURSOR);
 170 #endif
 171 #ifdef __WXMSW__
 172     SetCursor(wxCursor());
 173 #endif
 174
 175
 176     if (event.LeftDown())
 177     {
 178         if ( SashHitTest(x, y) )
 179         {
 180             CaptureMouse();
 181
 182             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 183
 184             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 185             {
 186                 DrawSashTracker(x, y);
 187             }
 188
 189             m_oldX = x;
 190             m_oldY = y;
 191             return;
 192         }
 193     }
 194     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 195     {
 196         // We can stop dragging now and see what we've got.
 197         m_dragMode = wxSPLIT_DRAG_NONE;
 198         ReleaseMouse();
 199
 200         // Erase old tracker
 201         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 202         {
 203             DrawSashTracker(m_oldX, m_oldY);
 204         }
 205
 206         // Obtain window size. We are only interested in the dimension the sash
 207         // splits up
 208         int w, h;
 209         GetClientSize(&w, &h);
 210         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 211         int new_sash_position =
 212             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 213
 214         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 215                                       this);
 216         eventSplitter.m_data.pos = new_sash_position;
 217         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 218         {
 219             new_sash_position = eventSplitter.GetSashPosition();
 220             if ( new_sash_position == -1 )
 221             {
 222                 // change not allowed
 223                 return;
 224             }
 225         }
 226
 227         if ( m_permitUnsplitAlways
 228                 || m_minimumPaneSize == 0 )
 229         {
 230             // Deal with possible unsplit scenarios
 231             if ( new_sash_position == 0 )
 232             {
 233                 // We remove the first window from the view
 234                 wxWindow *removedWindow = m_windowOne;
 235                 m_windowOne = m_windowTwo;
 236                 m_windowTwo = (wxWindow *) NULL;
 237                 SendUnsplitEvent(removedWindow);
 238                 m_sashPosition = 0;
 239             }
 240             else if ( new_sash_position == window_size )
 241             {
 242                 // We remove the second window from the view
 243                 wxWindow *removedWindow = m_windowTwo;
 244                 m_windowTwo = (wxWindow *) NULL;
 245                 SendUnsplitEvent(removedWindow);
 246                 m_sashPosition = 0;
 247             }
 248             else
 249             {
 250                 m_sashPosition = new_sash_position;
 251             }
 252         }
 253         else
 254         {
 255             m_sashPosition = new_sash_position;
 256         }
 257
 258         SizeWindows();
 259     }  // left up && dragging
 260     else if (event.Moving() && !event.Dragging())
 261     {
 262         // Just change the cursor if required
 263         if ( SashHitTest(x, y) )
 264         {
 265                 if ( m_splitMode == wxSPLIT_VERTICAL )
 266                 {
 267                     SetCursor(*m_sashCursorWE);
 268                 }
 269                 else
 270                 {
 271                     SetCursor(*m_sashCursorNS);
 272                 }
 273         }
 274 #ifdef __WXGTK__
 275         else
 276         {
 277             // where else do we unset the cursor?
 278             SetCursor(* wxSTANDARD_CURSOR);
 279         }
 280 #endif // __WXGTK__
 281     }
 282     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 283     {
 284         // Obtain window size. We are only interested in the dimension the sash
 285         // splits up
 286         int new_sash_position =
 287             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 288
 289         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 290                                       this);
 291         eventSplitter.m_data.pos = new_sash_position;
 292         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 293         {
 294             new_sash_position = eventSplitter.GetSashPosition();
 295             if ( new_sash_position == -1 )
 296             {
 297                 // change not allowed
 298                 return;
 299             }
 300         }
 301
 302         // Erase old tracker
 303         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 304         {
 305             DrawSashTracker(m_oldX, m_oldY);
 306         }
 307
 308         if (m_splitMode == wxSPLIT_VERTICAL)
 309             x = new_sash_position;
 310         else
 311             y = new_sash_position;
 312
 313         if (new_sash_position != -1)
 314         {
 315             // Only modify if permitted
 316             m_oldX = x;
 317             m_oldY = y;
 318         }
 319
 320 #ifdef __WXMSW__
 321         // As we captured the mouse, we may get the mouse events from outside
 322         // our window - for example, negative values in x, y. This has a weird
 323         // consequence under MSW where we use unsigned values sometimes and
 324         // signed ones other times: the coordinates turn as big positive
 325         // numbers and so the sash is drawn on the *right* side of the window
 326         // instead of the left (or bottom instead of top). Correct this.
 327         if ( (short)m_oldX < 0 )
 328             m_oldX = 0;
 329         if ( (short)m_oldY < 0 )
 330             m_oldY = 0;
 331 #endif // __WXMSW__
 332
 333         // Draw new one
 334         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 335         {
 336             DrawSashTracker(m_oldX, m_oldY);
 337         }
 338         else
 339         {
 340             m_sashPosition = new_sash_position;
 341             m_needUpdating = TRUE;
 342         }
 343     }
 344     else if ( event.LeftDClick() )
 345     {
 346         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 347                                       this);
 348         eventSplitter.m_data.pt.x = x;
 349         eventSplitter.m_data.pt.y = y;
 350
 351         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 352     }
 353 }
 354
 355 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 356 {
 357     // only process this message if we're not iconized - otherwise iconizing
 358     // and restoring a window containing the splitter has a funny side effect
 359     // of changing the splitter position!
 360     wxWindow *parent = GetParent();
 361     while ( parent && !parent->IsTopLevel() )
 362     {
 363         parent = parent->GetParent();
 364     }
 365
 366     bool iconized = FALSE;
 367     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 368     if ( frame )
 369         iconized = frame->IsIconized();
 370     else
 371     {
 372         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 373         if ( dialog )
 374             iconized = dialog->IsIconized();
 375         else
 376             wxFAIL_MSG(_T("should have a top level frame or dialog parent!"));
 377     }
 378
 379     if ( iconized )
 380     {
 381         event.Skip();
 382     }
 383     else
 384     {
 385         int cw, ch;
 386         GetClientSize( &cw, &ch );
 387         if ( m_windowTwo )
 388         {
 389             if ( m_splitMode == wxSPLIT_VERTICAL )
 390             {
 391                 if ( m_sashPosition >= (cw - 5) )
 392                     m_sashPosition = wxMax(10, cw - 40);
 393             }
 394             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 395             {
 396                 if ( m_sashPosition >= (ch - 5) )
 397                     m_sashPosition = wxMax(10, ch - 40);
 398             }
 399         }
 400
 401         SizeWindows();
 402     }
 403 }
 404
 405 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 406 {
 407     if ( m_windowTwo == NULL || m_sashPosition == 0)
 408         return FALSE; // No sash
 409
 410     if ( m_splitMode == wxSPLIT_VERTICAL )
 411     {
 412         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 413             return TRUE;
 414         else
 415             return FALSE;
 416     }
 417     else
 418     {
 419         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 420             return TRUE;
 421         else
 422             return FALSE;
 423     }
 424
 425     return FALSE;
 426 }
 427
 428 // Draw 3D effect borders
 429 void wxSplitterWindow::DrawBorders(wxDC& dc)
 430 {
 431     int w, h;
 432     GetClientSize(&w, &h);
 433
 434     if ( GetWindowStyleFlag() & wxSP_3D )
 435     {
 436         dc.SetPen(*m_mediumShadowPen);
 437         dc.DrawLine(0, 0, w-1, 0);
 438         dc.DrawLine(0, 0, 0, h - 1);
 439
 440         dc.SetPen(*m_darkShadowPen);
 441         dc.DrawLine(1, 1, w-2, 1);
 442         dc.DrawLine(1, 1, 1, h-2);
 443
 444         dc.SetPen(*m_hilightPen);
 445         dc.DrawLine(0, h-1, w-1, h-1);
 446         dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
 447                                      /// Anyway, h is required for MSW.
 448
 449         dc.SetPen(*m_lightShadowPen);
 450         dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
 451         dc.DrawLine(1, h-2, w-1, h-2);     // Bottom
 452     }
 453     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 454     {
 455         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 456         dc.SetPen(*wxBLACK_PEN);
 457         dc.DrawRectangle(0, 0, w-1, h-1);
 458     }
 459
 460     dc.SetPen(wxNullPen);
 461     dc.SetBrush(wxNullBrush);
 462 }
 463
 464 // Draw the sash
 465 void wxSplitterWindow::DrawSash(wxDC& dc)
 466 {
 467     if ( m_sashPosition == 0 || !m_windowTwo)
 468         return;
 469
 470     int w, h;
 471     GetClientSize(&w, &h);
 472
 473     if ( GetWindowStyleFlag() & wxSP_3D )
 474     {
 475         if ( m_splitMode == wxSPLIT_VERTICAL )
 476         {
 477             dc.SetPen(*m_facePen);
 478             dc.SetBrush(*m_faceBrush);
 479             dc.DrawRectangle(m_sashPosition + 2, 0, m_sashSize - 4, h);
 480
 481             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 482
 483             dc.SetPen(*m_lightShadowPen);
 484             dc.DrawLine(m_sashPosition, 1, m_sashPosition, h-2);
 485
 486             dc.SetPen(*m_hilightPen);
 487             dc.DrawLine(m_sashPosition+1, 0, m_sashPosition+1, h);
 488
 489             dc.SetPen(*m_mediumShadowPen);
 490             dc.DrawLine(m_sashPosition+m_sashSize-2, 1, m_sashPosition+m_sashSize-2, h-1);
 491
 492             dc.SetPen(*m_darkShadowPen);
 493             dc.DrawLine(m_sashPosition+m_sashSize-1, 2, m_sashPosition+m_sashSize-1, h-2);
 494         }
 495         else
 496         {
 497             dc.SetPen(*m_facePen);
 498             dc.SetBrush(*m_faceBrush);
 499             dc.DrawRectangle(0, m_sashPosition + 2, w, m_sashSize - 4);
 500
 501             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 502
 503             dc.SetPen(*m_lightShadowPen);
 504             dc.DrawLine(1, m_sashPosition, w-2, m_sashPosition);
 505
 506             dc.SetPen(*m_hilightPen);
 507             dc.DrawLine(0, m_sashPosition+1, w, m_sashPosition+1);
 508
 509             dc.SetPen(*m_mediumShadowPen);
 510             dc.DrawLine(1, m_sashPosition+m_sashSize-2, w-1, m_sashPosition+m_sashSize-2);
 511
 512             dc.SetPen(*m_darkShadowPen);
 513             dc.DrawLine(2, m_sashPosition+m_sashSize-1, w-2, m_sashPosition+m_sashSize-1);
 514         }
 515     }
 516     else
 517     {
 518         if ( m_splitMode == wxSPLIT_VERTICAL )
 519         {
 520             dc.SetPen(*wxBLACK_PEN);
 521             dc.SetBrush(*wxBLACK_BRUSH);
 522             int h1 = h-1;
 523             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 524                 h1 += 1; // Not sure why this is necessary...
 525             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 526         }
 527         else
 528         {
 529             dc.SetPen(*wxBLACK_PEN);
 530             dc.SetBrush(*wxBLACK_BRUSH);
 531             int w1 = w-1;
 532             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 533                 w1 ++;
 534
 535             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 536         }
 537
 538     }
 539
 540     dc.SetPen(wxNullPen);
 541     dc.SetBrush(wxNullBrush);
 542 }
 543
 544 // Draw the sash tracker (for whilst moving the sash)
 545 void wxSplitterWindow::DrawSashTracker(int x, int y)
 546 {
 547     int w, h;
 548     GetClientSize(&w, &h);
 549
 550     wxScreenDC screenDC;
 551     int x1, y1;
 552     int x2, y2;
 553
 554     if ( m_splitMode == wxSPLIT_VERTICAL )
 555     {
 556         x1 = x; y1 = 2;
 557         x2 = x; y2 = h-2;
 558
 559         if ( x1 > w )
 560         {
 561             x1 = w; x2 = w;
 562         }
 563         else if ( x1 < 0 )
 564         {
 565             x1 = 0; x2 = 0;
 566         }
 567     }
 568     else
 569     {
 570         x1 = 2; y1 = y;
 571         x2 = w-2; y2 = y;
 572
 573         if ( y1 > h )
 574         {
 575             y1 = h;
 576             y2 = h;
 577         }
 578         else if ( y1 < 0 )
 579         {
 580             y1 = 0;
 581             y2 = 0;
 582         }
 583     }
 584
 585     ClientToScreen(&x1, &y1);
 586     ClientToScreen(&x2, &y2);
 587
 588     screenDC.SetLogicalFunction(wxINVERT);
 589     screenDC.SetPen(*m_sashTrackerPen);
 590     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 591
 592     screenDC.DrawLine(x1, y1, x2, y2);
 593
 594     screenDC.SetLogicalFunction(wxCOPY);
 595
 596     screenDC.SetPen(wxNullPen);
 597     screenDC.SetBrush(wxNullBrush);
 598 }
 599
 600 // Position and size subwindows.
 601 // Note that the border size applies to each subwindow, not
 602 // including the edges next to the sash.
 603 void wxSplitterWindow::SizeWindows()
 604 {
 605     int w, h;
 606     GetClientSize(&w, &h);
 607
 608     if ( m_windowOne && !m_windowTwo )
 609     {
 610         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 611
 612         if (m_windowOne->GetAutoLayout())
 613             m_windowOne->Layout();
 614     }
 615     else if ( m_windowOne && m_windowTwo )
 616     {
 617         if (m_splitMode == wxSPLIT_VERTICAL)
 618         {
 619             int x1 = m_borderSize;
 620             int y1 = m_borderSize;
 621             int w1 = m_sashPosition - m_borderSize;
 622             int h1 = h - 2*m_borderSize;
 623
 624             int x2 = m_sashPosition + m_sashSize;
 625             int y2 = m_borderSize;
 626             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 627             int h2 = h - 2*m_borderSize;
 628
 629             m_windowOne->SetSize(x1, y1, w1, h1);
 630             m_windowTwo->SetSize(x2, y2, w2, h2);
 631
 632             if (m_windowOne->GetAutoLayout())
 633                 m_windowOne->Layout();
 634             if (m_windowTwo->GetAutoLayout())
 635                 m_windowTwo->Layout();
 636         }
 637         else
 638         {
 639             m_windowOne->SetSize(m_borderSize, m_borderSize,
 640                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 641             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 642                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 643
 644             if (m_windowOne->GetAutoLayout())
 645                 m_windowOne->Layout();
 646             if (m_windowTwo->GetAutoLayout())
 647                 m_windowTwo->Layout();
 648         }
 649     }
 650     wxClientDC dc(this);
 651     DrawBorders(dc);
 652     DrawSash(dc);
 653 }
 654
 655 // Set pane for unsplit window
 656 void wxSplitterWindow::Initialize(wxWindow *window)
 657 {
 658     m_windowOne = window;
 659     m_windowTwo = (wxWindow *) NULL;
 660     m_sashPosition = 0;
 661 }
 662
 663 // Associates the given window with window 2, drawing the appropriate sash
 664 // and changing the split mode.
 665 // Does nothing and returns FALSE if the window is already split.
 666 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 667 {
 668     if ( IsSplit() )
 669         return FALSE;
 670
 671     int w, h;
 672     GetClientSize(&w, &h);
 673
 674     m_splitMode = wxSPLIT_VERTICAL;
 675     m_windowOne = window1;
 676     m_windowTwo = window2;
 677     if ( sashPosition > 0 )
 678         m_sashPosition = sashPosition;
 679     else if ( sashPosition < 0 )
 680         m_sashPosition = w - sashPosition;
 681     else    // default
 682         m_sashPosition = w/2;
 683
 684     SizeWindows();
 685
 686     return TRUE;
 687 }
 688
 689 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 690 {
 691     if ( IsSplit() )
 692         return FALSE;
 693
 694     int w, h;
 695     GetClientSize(&w, &h);
 696
 697     m_splitMode = wxSPLIT_HORIZONTAL;
 698     m_windowOne = window1;
 699     m_windowTwo = window2;
 700     if ( sashPosition > 0 )
 701         m_sashPosition = sashPosition;
 702     else if ( sashPosition < 0 )
 703         m_sashPosition = h - sashPosition;
 704     else    // default
 705         m_sashPosition = h/2;
 706
 707     SizeWindows();
 708
 709     return TRUE;
 710 }
 711
 712
 713 // Remove the specified (or second) window from the view
 714 // Doesn't actually delete the window.
 715 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 716 {
 717     if ( ! IsSplit() )
 718         return FALSE;
 719
 720     wxWindow *win = NULL;
 721     if ( toRemove == NULL || toRemove == m_windowTwo)
 722     {
 723         win = m_windowTwo ;
 724         m_windowTwo = (wxWindow *) NULL;
 725     }
 726     else if ( toRemove == m_windowOne )
 727     {
 728         win = m_windowOne ;
 729         m_windowOne = m_windowTwo;
 730         m_windowTwo = (wxWindow *) NULL;
 731     }
 732     else
 733     {
 734         wxFAIL_MSG(_T("splitter: attempt to remove a non-existent window"));
 735
 736         return FALSE;
 737     }
 738
 739     SendUnsplitEvent(win);
 740     m_sashPosition = 0;
 741     SizeWindows();
 742
 743     return TRUE;
 744 }
 745
 746 // Replace a window with another one
 747 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 748 {
 749     wxCHECK_MSG( winOld, FALSE, _T("use one of Split() functions instead") );
 750     wxCHECK_MSG( winNew, FALSE, _T("use Unsplit() functions instead") );
 751
 752     if ( winOld == m_windowTwo )
 753     {
 754         m_windowTwo = winNew;
 755     }
 756     else if ( winOld == m_windowOne )
 757     {
 758         m_windowOne = winNew;
 759     }
 760     else
 761     {
 762         wxFAIL_MSG(_T("splitter: attempt to replace a non-existent window"));
 763
 764         return FALSE;
 765     }
 766
 767     SizeWindows();
 768
 769     return TRUE;
 770 }
 771
 772 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 773 {
 774     m_sashPosition = position;
 775
 776     if ( redraw )
 777     {
 778         SizeWindows();
 779     }
 780 }
 781
 782 // Initialize colours
 783 void wxSplitterWindow::InitColours()
 784 {
 785     wxDELETE( m_facePen );
 786     wxDELETE( m_faceBrush );
 787     wxDELETE( m_mediumShadowPen );
 788     wxDELETE( m_darkShadowPen );
 789     wxDELETE( m_lightShadowPen );
 790     wxDELETE( m_hilightPen );
 791
 792     // Shadow colours
 793 #if defined(__WIN95__)
 794     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 795     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 796     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 797
 798     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 799     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 800
 801     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 802     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 803
 804     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 805     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 806
 807     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 808     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 809 #else // !Win32
 810     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 811     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 812     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 813     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 814     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 815     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 816 #endif // Win32/!Win32
 817 }
 818
 819 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 820 {
 821     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 822     event.m_data.win = winRemoved;
 823
 824     (void)GetEventHandler()->ProcessEvent(event);
 825 }
 826
 827 // ---------------------------------------------------------------------------
 828 // splitter event handlers
 829 // ---------------------------------------------------------------------------
 830
 831 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 832 {
 833     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 834     const int UNSPLIT_THRESHOLD = 4;
 835
 836     int newSashPosition = event.GetSashPosition();
 837
 838     // Obtain relevant window dimension for bottom / right threshold check
 839     int w, h;
 840     GetClientSize(&w, &h);
 841     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 842
 843     bool unsplit_scenario = FALSE;
 844     if ( m_permitUnsplitAlways
 845             || m_minimumPaneSize == 0 )
 846     {
 847         // Do edge detection if unsplit premitted
 848         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 849         {
 850             // threshold top / left check
 851             newSashPosition = 0;
 852             unsplit_scenario = TRUE;
 853         }
 854         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 855         {
 856             // threshold bottom/right check
 857             newSashPosition = window_size;
 858             unsplit_scenario = TRUE;
 859         }
 860     }
 861
 862     if ( !unsplit_scenario )
 863     {
 864         // If resultant pane would be too small, enlarge it
 865         if ( newSashPosition < m_minimumPaneSize )
 866             newSashPosition = m_minimumPaneSize;
 867         if ( newSashPosition > window_size - m_minimumPaneSize )
 868             newSashPosition = window_size - m_minimumPaneSize;
 869     }
 870
 871     // If the result is out of bounds it means minimum size is too big,
 872     // so split window in half as best compromise.
 873     if ( newSashPosition < 0 || newSashPosition > window_size )
 874         newSashPosition = window_size / 2;
 875
 876     // for compatibility, call the virtual function
 877     if ( !OnSashPositionChange(newSashPosition) )
 878     {
 879         newSashPosition = -1;
 880     }
 881
 882     event.SetSashPosition(newSashPosition);
 883 }
 884
 885 // Called when the sash is double-clicked. The default behaviour is to remove
 886 // the sash if the minimum pane size is zero.
 887 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 888 {
 889     // for compatibility, call the virtual function
 890     OnDoubleClickSash(event.GetX(), event.GetY());
 891
 892     if ( GetMinimumPaneSize() == 0
 893         || m_permitUnsplitAlways)
 894     {
 895         Unsplit();
 896     }
 897 }
 898
 899 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 900 {
 901     wxWindow *win = event.GetWindowBeingRemoved();
 902
 903     // for compatibility, call the virtual function
 904     OnUnsplit(win);
 905
 906     win->Show(FALSE);
 907 }