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 wxSplitterWindow::wxSplitterWindow()
  57 {
  58     m_splitMode = wxSPLIT_VERTICAL;
  59     m_permitUnsplitAlways = FALSE;
  60     m_windowOne = (wxWindow *) NULL;
  61     m_windowTwo = (wxWindow *) NULL;
  62     m_dragMode = wxSPLIT_DRAG_NONE;
  63     m_oldX = 0;
  64     m_oldY = 0;
  65     m_firstX = 0;
  66     m_firstY = 0;
  67     m_sashSize = 7;
  68     m_borderSize = 2;
  69     m_sashPosition = 0;
  70     m_sashCursorWE = (wxCursor *) NULL;
  71     m_sashCursorNS = (wxCursor *) NULL;
  72     m_sashTrackerPen = (wxPen *) NULL;
  73     m_lightShadowPen = (wxPen *) NULL;
  74     m_mediumShadowPen = (wxPen *) NULL;
  75     m_darkShadowPen = (wxPen *) NULL;
  76     m_faceBrush = (wxBrush *) NULL;
  77     m_facePen = (wxPen *) NULL;
  78     m_hilightPen = (wxPen *) NULL;
  79     m_minimumPaneSize = 0;
  80     m_needUpdating = FALSE;
  81 }
  82
  83 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  84                                    const wxPoint& pos,
  85                                    const wxSize& size,
  86                                    long style,
  87                                    const wxString& name)
  88                 : wxWindow(parent, id, pos, size, style, name)
  89 {
  90     m_splitMode = wxSPLIT_VERTICAL;
  91     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  92     m_windowOne = (wxWindow *) NULL;
  93     m_windowTwo = (wxWindow *) NULL;
  94     m_dragMode = wxSPLIT_DRAG_NONE;
  95     m_oldX = 0;
  96     m_oldY = 0;
  97     m_firstX = 0;
  98     m_firstY = 0;
  99     m_sashSize = 7;
 100     m_borderSize = 2;
 101     m_sashPosition = 0;
 102     m_minimumPaneSize = 0;
 103     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 104     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 105     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 106     m_lightShadowPen = (wxPen *) NULL;
 107     m_mediumShadowPen = (wxPen *) NULL;
 108     m_darkShadowPen = (wxPen *) NULL;
 109     m_faceBrush = (wxBrush *) NULL;
 110     m_facePen = (wxPen *) NULL;
 111     m_hilightPen = (wxPen *) NULL;
 112
 113     if ( style & wxSP_3D )
 114     {
 115         m_borderSize = 2;
 116         m_sashSize = 7;
 117     }
 118     else if ( style & wxSP_BORDER )
 119     {
 120         m_borderSize = 1;
 121         m_sashSize = 3;
 122     }
 123     else
 124     {
 125         m_borderSize = 0;
 126         m_sashSize = 3;
 127     }
 128
 129     // Eventually, we'll respond to colour change messages
 130     InitColours();
 131
 132     // For debugging purposes, to see the background.
 133 //    SetBackground(wxBLUE_BRUSH);
 134
 135     m_needUpdating = FALSE;
 136 }
 137
 138 wxSplitterWindow::~wxSplitterWindow()
 139 {
 140     delete m_sashCursorWE;
 141     delete m_sashCursorNS;
 142     delete m_sashTrackerPen;
 143     delete m_lightShadowPen;
 144     delete m_darkShadowPen;
 145     delete m_mediumShadowPen;
 146     delete m_hilightPen;
 147     delete m_facePen;
 148     delete m_faceBrush;
 149 }
 150
 151 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 152 {
 153     wxPaintDC dc(this);
 154
 155     if ( m_borderSize > 0 )
 156         DrawBorders(dc);
 157     DrawSash(dc);
 158 }
 159
 160 void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 161 {
 162     if (m_needUpdating)
 163         SizeWindows();
 164 }
 165
 166 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 167 {
 168     wxCoord x = (wxCoord)event.GetX(),
 169             y = (wxCoord)event.GetY();
 170
 171     // reset the cursor
 172 #ifdef __WXMOTIF__
 173     SetCursor(* wxSTANDARD_CURSOR);
 174 #endif
 175 #ifdef __WXMSW__
 176     SetCursor(wxCursor());
 177 #endif
 178
 179
 180     if (event.LeftDown())
 181     {
 182         if ( SashHitTest(x, y) )
 183         {
 184             CaptureMouse();
 185
 186             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 187
 188             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 189             {
 190                 DrawSashTracker(x, y);
 191             }
 192
 193             m_oldX = x;
 194             m_oldY = y;
 195
 196             if ( m_splitMode == wxSPLIT_VERTICAL )
 197             {
 198                 SetCursor(*m_sashCursorWE);
 199             }
 200             else
 201             {
 202                 SetCursor(*m_sashCursorNS);
 203             }
 204             return;
 205         }
 206     }
 207     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 208     {
 209         // We can stop dragging now and see what we've got.
 210         m_dragMode = wxSPLIT_DRAG_NONE;
 211         ReleaseMouse();
 212
 213         // Erase old tracker
 214         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 215         {
 216             DrawSashTracker(m_oldX, m_oldY);
 217         }
 218
 219         // Obtain window size. We are only interested in the dimension the sash
 220         // splits up
 221         int w, h;
 222         GetClientSize(&w, &h);
 223         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 224         int new_sash_position =
 225             (int) ( 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 =
 317             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 318
 319         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 320                                       this);
 321         eventSplitter.m_data.pos = new_sash_position;
 322         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 323         {
 324             new_sash_position = eventSplitter.GetSashPosition();
 325             if ( new_sash_position == -1 )
 326             {
 327                 // change not allowed
 328                 return;
 329             }
 330         }
 331
 332         if (new_sash_position == m_sashPosition)
 333             return;
 334
 335         // Erase old tracker
 336         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 337         {
 338             DrawSashTracker(m_oldX, m_oldY);
 339         }
 340
 341         if (m_splitMode == wxSPLIT_VERTICAL)
 342             x = new_sash_position;
 343         else
 344             y = new_sash_position;
 345
 346         // Remember old positions
 347         m_oldX = x;
 348         m_oldY = y;
 349
 350 #ifdef __WXMSW__
 351         // As we captured the mouse, we may get the mouse events from outside
 352         // our window - for example, negative values in x, y. This has a weird
 353         // consequence under MSW where we use unsigned values sometimes and
 354         // signed ones other times: the coordinates turn as big positive
 355         // numbers and so the sash is drawn on the *right* side of the window
 356         // instead of the left (or bottom instead of top). Correct this.
 357         if ( (short)m_oldX < 0 )
 358             m_oldX = 0;
 359         if ( (short)m_oldY < 0 )
 360             m_oldY = 0;
 361 #endif // __WXMSW__
 362
 363         // Draw new one
 364         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 365         {
 366             DrawSashTracker(m_oldX, m_oldY);
 367         }
 368         else
 369         {
 370             m_sashPosition = new_sash_position;
 371             m_needUpdating = TRUE;
 372         }
 373     }
 374     else if ( event.LeftDClick() )
 375     {
 376         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 377                                       this);
 378         eventSplitter.m_data.pt.x = x;
 379         eventSplitter.m_data.pt.y = y;
 380
 381         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 382     }
 383 }
 384
 385 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 386 {
 387     // only process this message if we're not iconized - otherwise iconizing
 388     // and restoring a window containing the splitter has a funny side effect
 389     // of changing the splitter position!
 390     wxWindow *parent = GetParent();
 391     while ( parent && !parent->IsTopLevel() )
 392     {
 393         parent = parent->GetParent();
 394     }
 395
 396     bool iconized = FALSE;
 397     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 398     if ( frame )
 399         iconized = frame->IsIconized();
 400     else
 401     {
 402         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 403         if ( dialog )
 404             iconized = dialog->IsIconized();
 405         else
 406             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 407     }
 408
 409     if ( iconized )
 410     {
 411         event.Skip();
 412     }
 413     else
 414     {
 415         int cw, ch;
 416         GetClientSize( &cw, &ch );
 417         if ( m_windowTwo )
 418         {
 419             if ( m_splitMode == wxSPLIT_VERTICAL )
 420             {
 421                 if ( m_sashPosition >= (cw - 5) )
 422                     m_sashPosition = wxMax(10, cw - 40);
 423             }
 424             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 425             {
 426                 if ( m_sashPosition >= (ch - 5) )
 427                     m_sashPosition = wxMax(10, ch - 40);
 428             }
 429         }
 430
 431         SizeWindows();
 432     }
 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_3D )
 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
 506     int w, h;
 507     GetClientSize(&w, &h);
 508
 509     if ( GetWindowStyleFlag() & wxSP_3D )
 510     {
 511         if ( m_splitMode == wxSPLIT_VERTICAL )
 512         {
 513             dc.SetPen(*m_facePen);
 514             dc.SetBrush(*m_faceBrush);
 515             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 516
 517             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 518
 519             dc.SetPen(*m_lightShadowPen);
 520                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 521             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 522
 523             dc.SetPen(*m_hilightPen);
 524             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 525
 526             dc.SetPen(*m_mediumShadowPen);
 527                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 528             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 529
 530             dc.SetPen(*m_darkShadowPen);
 531             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 532         }
 533         else
 534         {
 535             dc.SetPen(*m_facePen);
 536             dc.SetBrush(*m_faceBrush);
 537             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 538
 539             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 540
 541             dc.SetPen(*m_lightShadowPen);
 542             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 543
 544             dc.SetPen(*m_hilightPen);
 545             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 546
 547             dc.SetPen(*m_mediumShadowPen);
 548             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 549
 550             dc.SetPen(*m_darkShadowPen);
 551             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 552         }
 553     }
 554     else
 555     {
 556         if ( m_splitMode == wxSPLIT_VERTICAL )
 557         {
 558             dc.SetPen(*wxBLACK_PEN);
 559             dc.SetBrush(*wxBLACK_BRUSH);
 560             int h1 = h-1;
 561             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 562                 h1 += 1; // Not sure why this is necessary...
 563             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 564         }
 565         else
 566         {
 567             dc.SetPen(*wxBLACK_PEN);
 568             dc.SetBrush(*wxBLACK_BRUSH);
 569             int w1 = w-1;
 570             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 571                 w1 ++;
 572
 573             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 574         }
 575
 576     }
 577
 578     dc.SetPen(wxNullPen);
 579     dc.SetBrush(wxNullBrush);
 580 }
 581
 582 // Draw the sash tracker (for whilst moving the sash)
 583 void wxSplitterWindow::DrawSashTracker(int x, int y)
 584 {
 585     int w, h;
 586     GetClientSize(&w, &h);
 587
 588     wxScreenDC screenDC;
 589     int x1, y1;
 590     int x2, y2;
 591
 592     if ( m_splitMode == wxSPLIT_VERTICAL )
 593     {
 594         x1 = x; y1 = 2;
 595         x2 = x; y2 = h-2;
 596
 597         if ( x1 > w )
 598         {
 599             x1 = w; x2 = w;
 600         }
 601         else if ( x1 < 0 )
 602         {
 603             x1 = 0; x2 = 0;
 604         }
 605     }
 606     else
 607     {
 608         x1 = 2; y1 = y;
 609         x2 = w-2; y2 = y;
 610
 611         if ( y1 > h )
 612         {
 613             y1 = h;
 614             y2 = h;
 615         }
 616         else if ( y1 < 0 )
 617         {
 618             y1 = 0;
 619             y2 = 0;
 620         }
 621     }
 622
 623     ClientToScreen(&x1, &y1);
 624     ClientToScreen(&x2, &y2);
 625
 626     screenDC.SetLogicalFunction(wxINVERT);
 627     screenDC.SetPen(*m_sashTrackerPen);
 628     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 629
 630     screenDC.DrawLine(x1, y1, x2, y2);
 631
 632     screenDC.SetLogicalFunction(wxCOPY);
 633
 634     screenDC.SetPen(wxNullPen);
 635     screenDC.SetBrush(wxNullBrush);
 636 }
 637
 638 // Position and size subwindows.
 639 // Note that the border size applies to each subwindow, not
 640 // including the edges next to the sash.
 641 void wxSplitterWindow::SizeWindows()
 642 {
 643     int w, h;
 644     GetClientSize(&w, &h);
 645
 646     if ( m_windowOne && !m_windowTwo )
 647     {
 648         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 649
 650     }
 651     else if ( m_windowOne && m_windowTwo )
 652     {
 653         if (m_splitMode == wxSPLIT_VERTICAL)
 654         {
 655             int x1 = m_borderSize;
 656             int y1 = m_borderSize;
 657             int w1 = m_sashPosition - m_borderSize;
 658             int h1 = h - 2*m_borderSize;
 659
 660             int x2 = m_sashPosition + m_sashSize;
 661             int y2 = m_borderSize;
 662             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 663             int h2 = h - 2*m_borderSize;
 664
 665             m_windowOne->SetSize(x1, y1, w1, h1);
 666             m_windowTwo->SetSize(x2, y2, w2, h2);
 667
 668         }
 669         else
 670         {
 671             m_windowOne->SetSize(m_borderSize, m_borderSize,
 672                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 673             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 674                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 675
 676         }
 677     }
 678     wxClientDC dc(this);
 679     if ( m_borderSize > 0 )
 680         DrawBorders(dc);
 681     DrawSash(dc);
 682
 683     m_needUpdating = FALSE;
 684 }
 685
 686 // Set pane for unsplit window
 687 void wxSplitterWindow::Initialize(wxWindow *window)
 688 {
 689     m_windowOne = window;
 690     m_windowTwo = (wxWindow *) NULL;
 691     m_sashPosition = 0;
 692 }
 693
 694 // Associates the given window with window 2, drawing the appropriate sash
 695 // and changing the split mode.
 696 // Does nothing and returns FALSE if the window is already split.
 697 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 698 {
 699     if ( IsSplit() )
 700         return FALSE;
 701
 702     int w, h;
 703     GetClientSize(&w, &h);
 704
 705     m_splitMode = wxSPLIT_VERTICAL;
 706     m_windowOne = window1;
 707     m_windowTwo = window2;
 708     if ( sashPosition > 0 )
 709         m_sashPosition = sashPosition;
 710     else if ( sashPosition < 0 )
 711         m_sashPosition = w - sashPosition;
 712     else    // default
 713         m_sashPosition = w/2;
 714
 715     SizeWindows();
 716
 717     return TRUE;
 718 }
 719
 720 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 721 {
 722     if ( IsSplit() )
 723         return FALSE;
 724
 725     int w, h;
 726     GetClientSize(&w, &h);
 727
 728     m_splitMode = wxSPLIT_HORIZONTAL;
 729     m_windowOne = window1;
 730     m_windowTwo = window2;
 731     if ( sashPosition > 0 )
 732         m_sashPosition = sashPosition;
 733     else if ( sashPosition < 0 )
 734         m_sashPosition = h - sashPosition;
 735     else    // default
 736         m_sashPosition = h/2;
 737
 738     SizeWindows();
 739
 740     return TRUE;
 741 }
 742
 743
 744 // Remove the specified (or second) window from the view
 745 // Doesn't actually delete the window.
 746 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 747 {
 748     if ( ! IsSplit() )
 749         return FALSE;
 750
 751     wxWindow *win = NULL;
 752     if ( toRemove == NULL || toRemove == m_windowTwo)
 753     {
 754         win = m_windowTwo ;
 755         m_windowTwo = (wxWindow *) NULL;
 756     }
 757     else if ( toRemove == m_windowOne )
 758     {
 759         win = m_windowOne ;
 760         m_windowOne = m_windowTwo;
 761         m_windowTwo = (wxWindow *) NULL;
 762     }
 763     else
 764     {
 765         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 766
 767         return FALSE;
 768     }
 769
 770     SendUnsplitEvent(win);
 771     m_sashPosition = 0;
 772     SizeWindows();
 773
 774     return TRUE;
 775 }
 776
 777 // Replace a window with another one
 778 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 779 {
 780     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 781     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 782
 783     if ( winOld == m_windowTwo )
 784     {
 785         m_windowTwo = winNew;
 786     }
 787     else if ( winOld == m_windowOne )
 788     {
 789         m_windowOne = winNew;
 790     }
 791     else
 792     {
 793         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 794
 795         return FALSE;
 796     }
 797
 798     SizeWindows();
 799
 800     return TRUE;
 801 }
 802
 803 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 804 {
 805     m_sashPosition = position;
 806
 807     if ( redraw )
 808     {
 809         SizeWindows();
 810     }
 811 }
 812
 813 // Initialize colours
 814 void wxSplitterWindow::InitColours()
 815 {
 816     wxDELETE( m_facePen );
 817     wxDELETE( m_faceBrush );
 818     wxDELETE( m_mediumShadowPen );
 819     wxDELETE( m_darkShadowPen );
 820     wxDELETE( m_lightShadowPen );
 821     wxDELETE( m_hilightPen );
 822
 823     // Shadow colours
 824 #if defined(__WIN95__)
 825     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 826     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 827     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 828
 829     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 830     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 831
 832     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 833     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 834
 835     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 836     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 837
 838     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 839     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 840 #else // !Win32
 841     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 842     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 843     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 844     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 845     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 846     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 847 #endif // Win32/!Win32
 848 }
 849
 850 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 851 {
 852     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 853     event.m_data.win = winRemoved;
 854
 855     (void)GetEventHandler()->ProcessEvent(event);
 856 }
 857
 858 // ---------------------------------------------------------------------------
 859 // splitter event handlers
 860 // ---------------------------------------------------------------------------
 861
 862 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 863 {
 864     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 865     const int UNSPLIT_THRESHOLD = 4;
 866
 867     int newSashPosition = event.GetSashPosition();
 868
 869     // Obtain relevant window dimension for bottom / right threshold check
 870     int w, h;
 871     GetClientSize(&w, &h);
 872     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 873
 874     bool unsplit_scenario = FALSE;
 875     if ( m_permitUnsplitAlways
 876             || m_minimumPaneSize == 0 )
 877     {
 878         // Do edge detection if unsplit premitted
 879         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 880         {
 881             // threshold top / left check
 882             newSashPosition = 0;
 883             unsplit_scenario = TRUE;
 884         }
 885         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 886         {
 887             // threshold bottom/right check
 888             newSashPosition = window_size;
 889             unsplit_scenario = TRUE;
 890         }
 891     }
 892
 893     if ( !unsplit_scenario )
 894     {
 895         // If resultant pane would be too small, enlarge it
 896         if ( newSashPosition < m_minimumPaneSize )
 897             newSashPosition = m_minimumPaneSize;
 898         if ( newSashPosition > window_size - m_minimumPaneSize )
 899             newSashPosition = window_size - m_minimumPaneSize;
 900     }
 901
 902     // If the result is out of bounds it means minimum size is too big,
 903     // so split window in half as best compromise.
 904     if ( newSashPosition < 0 || newSashPosition > window_size )
 905         newSashPosition = window_size / 2;
 906
 907     // for compatibility, call the virtual function
 908     if ( !OnSashPositionChange(newSashPosition) )
 909     {
 910         newSashPosition = -1;
 911     }
 912
 913     event.SetSashPosition(newSashPosition);
 914 }
 915
 916 // Called when the sash is double-clicked. The default behaviour is to remove
 917 // the sash if the minimum pane size is zero.
 918 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 919 {
 920     // for compatibility, call the virtual function
 921     OnDoubleClickSash(event.GetX(), event.GetY());
 922
 923     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 924     {
 925         Unsplit();
 926     }
 927 }
 928
 929 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 930 {
 931     wxWindow *win = event.GetWindowBeingRemoved();
 932
 933     // do it before calling OnUnsplit() which may delete the window
 934     win->Show(FALSE);
 935
 936     // for compatibility, call the virtual function
 937     OnUnsplit(win);
 938 }
 939
 940 #if defined(__WXMSW__)
 941     #define WXUNUSED_UNLESS_MSW(identifier)    identifier
 942 #else
 943     #define WXUNUSED_UNLESS_MSW(identifier)    WXUNUSED(identifier)
 944 #endif
 945
 946 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& WXUNUSED_UNLESS_MSW(event))
 947 {
 948     // this is currently called (and needed) under MSW only...
 949 #ifdef __WXMSW__
 950
 951     // if we don't do it, the resizing cursor might be set for child window:
 952     // and like this we explicitly say that our cursor should not be used for
 953     // children windows which overlap us
 954
 955     if ( SashHitTest(event.GetX(), event.GetY()) )
 956     {
 957         // default processing is ok
 958         event.Skip();
 959     }
 960     //else: do nothing, in particular, don't call Skip()
 961 #endif // wxMSW
 962 }