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
  35 #if !USE_SHARED_LIBRARY
  36 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  37 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
  38
  39 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  40     EVT_PAINT(wxSplitterWindow::OnPaint)
  41     EVT_SIZE(wxSplitterWindow::OnSize)
  42     EVT_IDLE(wxSplitterWindow::OnIdle)
  43     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  44
  45     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  46     // NB: we borrow OnSashPosChanged for purposes of
  47     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  48     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  49     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  50     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  51 END_EVENT_TABLE()
  52 #endif
  53
  54 wxSplitterWindow::wxSplitterWindow()
  55 {
  56     m_splitMode = wxSPLIT_VERTICAL;
  57     m_permitUnsplitAlways = FALSE;
  58     m_windowOne = (wxWindow *) NULL;
  59     m_windowTwo = (wxWindow *) NULL;
  60     m_dragMode = wxSPLIT_DRAG_NONE;
  61     m_oldX = 0;
  62     m_oldY = 0;
  63     m_firstX = 0;
  64     m_firstY = 0;
  65     m_sashSize = 7;
  66     m_borderSize = 2;
  67     m_sashPosition = 0;
  68     m_sashCursorWE = (wxCursor *) NULL;
  69     m_sashCursorNS = (wxCursor *) NULL;
  70     m_sashTrackerPen = (wxPen *) NULL;
  71     m_lightShadowPen = (wxPen *) NULL;
  72     m_mediumShadowPen = (wxPen *) NULL;
  73     m_darkShadowPen = (wxPen *) NULL;
  74     m_faceBrush = (wxBrush *) NULL;
  75     m_facePen = (wxPen *) NULL;
  76     m_hilightPen = (wxPen *) NULL;
  77     m_minimumPaneSize = 0;
  78     m_needUpdating = FALSE;
  79 }
  80
  81 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  82                                    const wxPoint& pos,
  83                                    const wxSize& size,
  84                                    long style,
  85                                    const wxString& name)
  86                 : wxWindow(parent, id, pos, size, style, name)
  87 {
  88     m_splitMode = wxSPLIT_VERTICAL;
  89     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  90     m_windowOne = (wxWindow *) NULL;
  91     m_windowTwo = (wxWindow *) NULL;
  92     m_dragMode = wxSPLIT_DRAG_NONE;
  93     m_oldX = 0;
  94     m_oldY = 0;
  95     m_firstX = 0;
  96     m_firstY = 0;
  97     m_sashSize = 7;
  98     m_borderSize = 2;
  99     m_sashPosition = 0;
 100     m_minimumPaneSize = 0;
 101     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 102     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 103     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 104     m_lightShadowPen = (wxPen *) NULL;
 105     m_mediumShadowPen = (wxPen *) NULL;
 106     m_darkShadowPen = (wxPen *) NULL;
 107     m_faceBrush = (wxBrush *) NULL;
 108     m_facePen = (wxPen *) NULL;
 109     m_hilightPen = (wxPen *) NULL;
 110
 111     if ( style & wxSP_3D )
 112     {
 113         m_borderSize = 2;
 114         m_sashSize = 7;
 115     }
 116     else if ( style & wxSP_BORDER )
 117     {
 118         m_borderSize = 1;
 119         m_sashSize = 3;
 120     }
 121     else
 122     {
 123         m_borderSize = 0;
 124         m_sashSize = 3;
 125     }
 126
 127     // Eventually, we'll respond to colour change messages
 128     InitColours();
 129
 130     // For debugging purposes, to see the background.
 131 //    SetBackground(wxBLUE_BRUSH);
 132
 133     m_needUpdating = FALSE;
 134 }
 135
 136 wxSplitterWindow::~wxSplitterWindow()
 137 {
 138     delete m_sashCursorWE;
 139     delete m_sashCursorNS;
 140     delete m_sashTrackerPen;
 141     delete m_lightShadowPen;
 142     delete m_darkShadowPen;
 143     delete m_mediumShadowPen;
 144     delete m_hilightPen;
 145     delete m_facePen;
 146     delete m_faceBrush;
 147 }
 148
 149 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 150 {
 151     wxPaintDC dc(this);
 152
 153     if ( m_borderSize > 0 )
 154         DrawBorders(dc);
 155     DrawSash(dc);
 156 }
 157
 158 void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 159 {
 160     if (m_needUpdating)
 161         SizeWindows();
 162 }
 163
 164 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 165 {
 166     long x = event.GetX();
 167     long y = event.GetY();
 168
 169     // reset the cursor
 170 #ifdef __WXMOTIF__
 171     SetCursor(* wxSTANDARD_CURSOR);
 172 #endif
 173 #ifdef __WXMSW__
 174     SetCursor(wxCursor());
 175 #endif
 176
 177
 178     if (event.LeftDown())
 179     {
 180         if ( SashHitTest(x, y) )
 181         {
 182             CaptureMouse();
 183
 184             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 185
 186             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 187             {
 188                 DrawSashTracker(x, y);
 189             }
 190
 191             m_oldX = x;
 192             m_oldY = y;
 193             return;
 194         }
 195     }
 196     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 197     {
 198         // We can stop dragging now and see what we've got.
 199         m_dragMode = wxSPLIT_DRAG_NONE;
 200         ReleaseMouse();
 201
 202         // Erase old tracker
 203         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 204         {
 205             DrawSashTracker(m_oldX, m_oldY);
 206         }
 207
 208         // Obtain window size. We are only interested in the dimension the sash
 209         // splits up
 210         int w, h;
 211         GetClientSize(&w, &h);
 212         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 213         int new_sash_position =
 214             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 215
 216         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 217                                       this);
 218         eventSplitter.m_data.pos = new_sash_position;
 219         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 220         {
 221             new_sash_position = eventSplitter.GetSashPosition();
 222             if ( new_sash_position == -1 )
 223             {
 224                 // change not allowed
 225                 return;
 226             }
 227         }
 228
 229         if ( m_permitUnsplitAlways
 230                 || m_minimumPaneSize == 0 )
 231         {
 232             // Deal with possible unsplit scenarios
 233             if ( new_sash_position == 0 )
 234             {
 235                 // We remove the first window from the view
 236                 wxWindow *removedWindow = m_windowOne;
 237                 m_windowOne = m_windowTwo;
 238                 m_windowTwo = (wxWindow *) NULL;
 239                 SendUnsplitEvent(removedWindow);
 240                 m_sashPosition = 0;
 241             }
 242             else if ( new_sash_position == window_size )
 243             {
 244                 // We remove the second window from the view
 245                 wxWindow *removedWindow = m_windowTwo;
 246                 m_windowTwo = (wxWindow *) NULL;
 247                 SendUnsplitEvent(removedWindow);
 248                 m_sashPosition = 0;
 249             }
 250             else
 251             {
 252                 m_sashPosition = new_sash_position;
 253             }
 254         }
 255         else
 256         {
 257             m_sashPosition = new_sash_position;
 258         }
 259
 260         SizeWindows();
 261     }  // left up && dragging
 262     else if (event.Moving() && !event.Dragging())
 263     {
 264         // Just change the cursor if required
 265         if ( SashHitTest(x, y) )
 266         {
 267                 if ( m_splitMode == wxSPLIT_VERTICAL )
 268                 {
 269                     SetCursor(*m_sashCursorWE);
 270                 }
 271                 else
 272                 {
 273                     SetCursor(*m_sashCursorNS);
 274                 }
 275         }
 276 #ifdef __WXGTK__
 277         else
 278         {
 279             // where else do we unset the cursor?
 280             SetCursor(* wxSTANDARD_CURSOR);
 281         }
 282 #endif // __WXGTK__
 283     }
 284     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 285     {
 286         // Obtain window size. We are only interested in the dimension the sash
 287         // splits up
 288         int new_sash_position =
 289             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 290
 291         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 292                                       this);
 293         eventSplitter.m_data.pos = new_sash_position;
 294         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 295         {
 296             new_sash_position = eventSplitter.GetSashPosition();
 297             if ( new_sash_position == -1 )
 298             {
 299                 // change not allowed
 300                 return;
 301             }
 302         }
 303
 304         // Erase old tracker
 305         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 306         {
 307             DrawSashTracker(m_oldX, m_oldY);
 308         }
 309
 310         if (m_splitMode == wxSPLIT_VERTICAL)
 311             x = new_sash_position;
 312         else
 313             y = new_sash_position;
 314
 315         if (new_sash_position != -1)
 316         {
 317             // Only modify if permitted
 318             m_oldX = x;
 319             m_oldY = y;
 320         }
 321
 322 #ifdef __WXMSW__
 323         // As we captured the mouse, we may get the mouse events from outside
 324         // our window - for example, negative values in x, y. This has a weird
 325         // consequence under MSW where we use unsigned values sometimes and
 326         // signed ones other times: the coordinates turn as big positive
 327         // numbers and so the sash is drawn on the *right* side of the window
 328         // instead of the left (or bottom instead of top). Correct this.
 329         if ( (short)m_oldX < 0 )
 330             m_oldX = 0;
 331         if ( (short)m_oldY < 0 )
 332             m_oldY = 0;
 333 #endif // __WXMSW__
 334
 335         // Draw new one
 336         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 337         {
 338             DrawSashTracker(m_oldX, m_oldY);
 339         }
 340         else
 341         {
 342             m_sashPosition = new_sash_position;
 343             m_needUpdating = TRUE;
 344         }
 345     }
 346     else if ( event.LeftDClick() )
 347     {
 348         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 349                                       this);
 350         eventSplitter.m_data.pt.x = x;
 351         eventSplitter.m_data.pt.y = y;
 352
 353         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 354     }
 355 }
 356
 357 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 358 {
 359     // only process this message if we're not iconized - otherwise iconizing
 360     // and restoring a window containing the splitter has a funny side effect
 361     // of changing the splitter position!
 362     wxWindow *parent = GetParent();
 363     while ( parent && !parent->IsTopLevel() )
 364     {
 365         parent = parent->GetParent();
 366     }
 367
 368     bool iconized = FALSE;
 369     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 370     if ( frame )
 371         iconized = frame->IsIconized();
 372     else
 373     {
 374         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 375         if ( dialog )
 376             iconized = dialog->IsIconized();
 377         else
 378             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 379     }
 380
 381     if ( iconized )
 382     {
 383         event.Skip();
 384     }
 385     else
 386     {
 387         int cw, ch;
 388         GetClientSize( &cw, &ch );
 389         if ( m_windowTwo )
 390         {
 391             if ( m_splitMode == wxSPLIT_VERTICAL )
 392             {
 393                 if ( m_sashPosition >= (cw - 5) )
 394                     m_sashPosition = wxMax(10, cw - 40);
 395             }
 396             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 397             {
 398                 if ( m_sashPosition >= (ch - 5) )
 399                     m_sashPosition = wxMax(10, ch - 40);
 400             }
 401         }
 402
 403         SizeWindows();
 404     }
 405 }
 406
 407 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 408 {
 409     if ( m_windowTwo == NULL || m_sashPosition == 0)
 410         return FALSE; // No sash
 411
 412     if ( m_splitMode == wxSPLIT_VERTICAL )
 413     {
 414         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 415             return TRUE;
 416         else
 417             return FALSE;
 418     }
 419     else
 420     {
 421         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 422             return TRUE;
 423         else
 424             return FALSE;
 425     }
 426
 427     return FALSE;
 428 }
 429
 430 // Draw 3D effect borders
 431 void wxSplitterWindow::DrawBorders(wxDC& dc)
 432 {
 433     int w, h;
 434     GetClientSize(&w, &h);
 435
 436     if ( GetWindowStyleFlag() & wxSP_3D )
 437     {
 438
 439         dc.SetPen(*m_facePen);
 440         dc.SetBrush(*m_faceBrush);
 441         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 442         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 443         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 444         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 445
 446         dc.SetPen(*m_mediumShadowPen);
 447         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 448         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 449
 450         dc.SetPen(*m_darkShadowPen);
 451         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 452         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 453
 454         dc.SetPen(*m_hilightPen);
 455         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 456         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.
 457                                      /// Anyway, h is required for MSW.
 458
 459         dc.SetPen(*m_lightShadowPen);
 460         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 461         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 462     }
 463     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 464     {
 465         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 466         dc.SetPen(*wxBLACK_PEN);
 467         dc.DrawRectangle(0, 0, w-1, h-1);
 468     }
 469
 470     dc.SetPen(wxNullPen);
 471     dc.SetBrush(wxNullBrush);
 472 }
 473
 474 // Draw the sash
 475 void wxSplitterWindow::DrawSash(wxDC& dc)
 476 {
 477     if ( m_sashPosition == 0 || !m_windowTwo)
 478         return;
 479
 480     int w, h;
 481     GetClientSize(&w, &h);
 482
 483     if ( GetWindowStyleFlag() & wxSP_3D )
 484     {
 485         if ( m_splitMode == wxSPLIT_VERTICAL )
 486         {
 487             dc.SetPen(*m_facePen);
 488             dc.SetBrush(*m_faceBrush);
 489             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 490
 491             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 492
 493             dc.SetPen(*m_lightShadowPen);
 494                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 495             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 496
 497             dc.SetPen(*m_hilightPen);
 498             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 499
 500             dc.SetPen(*m_mediumShadowPen);
 501                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 502             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 503
 504             dc.SetPen(*m_darkShadowPen);
 505             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 506         }
 507         else
 508         {
 509             dc.SetPen(*m_facePen);
 510             dc.SetBrush(*m_faceBrush);
 511             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 512
 513             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 514
 515             dc.SetPen(*m_lightShadowPen);
 516             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 517
 518             dc.SetPen(*m_hilightPen);
 519             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 520
 521             dc.SetPen(*m_mediumShadowPen);
 522             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 523
 524             dc.SetPen(*m_darkShadowPen);
 525             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 526         }
 527     }
 528     else
 529     {
 530         if ( m_splitMode == wxSPLIT_VERTICAL )
 531         {
 532             dc.SetPen(*wxBLACK_PEN);
 533             dc.SetBrush(*wxBLACK_BRUSH);
 534             int h1 = h-1;
 535             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 536                 h1 += 1; // Not sure why this is necessary...
 537             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 538         }
 539         else
 540         {
 541             dc.SetPen(*wxBLACK_PEN);
 542             dc.SetBrush(*wxBLACK_BRUSH);
 543             int w1 = w-1;
 544             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 545                 w1 ++;
 546
 547             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 548         }
 549
 550     }
 551
 552     dc.SetPen(wxNullPen);
 553     dc.SetBrush(wxNullBrush);
 554 }
 555
 556 // Draw the sash tracker (for whilst moving the sash)
 557 void wxSplitterWindow::DrawSashTracker(int x, int y)
 558 {
 559     int w, h;
 560     GetClientSize(&w, &h);
 561
 562     wxScreenDC screenDC;
 563     int x1, y1;
 564     int x2, y2;
 565
 566     if ( m_splitMode == wxSPLIT_VERTICAL )
 567     {
 568         x1 = x; y1 = 2;
 569         x2 = x; y2 = h-2;
 570
 571         if ( x1 > w )
 572         {
 573             x1 = w; x2 = w;
 574         }
 575         else if ( x1 < 0 )
 576         {
 577             x1 = 0; x2 = 0;
 578         }
 579     }
 580     else
 581     {
 582         x1 = 2; y1 = y;
 583         x2 = w-2; y2 = y;
 584
 585         if ( y1 > h )
 586         {
 587             y1 = h;
 588             y2 = h;
 589         }
 590         else if ( y1 < 0 )
 591         {
 592             y1 = 0;
 593             y2 = 0;
 594         }
 595     }
 596
 597     ClientToScreen(&x1, &y1);
 598     ClientToScreen(&x2, &y2);
 599
 600     screenDC.SetLogicalFunction(wxINVERT);
 601     screenDC.SetPen(*m_sashTrackerPen);
 602     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 603
 604     screenDC.DrawLine(x1, y1, x2, y2);
 605
 606     screenDC.SetLogicalFunction(wxCOPY);
 607
 608     screenDC.SetPen(wxNullPen);
 609     screenDC.SetBrush(wxNullBrush);
 610 }
 611
 612 // Position and size subwindows.
 613 // Note that the border size applies to each subwindow, not
 614 // including the edges next to the sash.
 615 void wxSplitterWindow::SizeWindows()
 616 {
 617     int w, h;
 618     GetClientSize(&w, &h);
 619
 620     if ( m_windowOne && !m_windowTwo )
 621     {
 622         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 623
 624     }
 625     else if ( m_windowOne && m_windowTwo )
 626     {
 627         if (m_splitMode == wxSPLIT_VERTICAL)
 628         {
 629             int x1 = m_borderSize;
 630             int y1 = m_borderSize;
 631             int w1 = m_sashPosition - m_borderSize;
 632             int h1 = h - 2*m_borderSize;
 633
 634             int x2 = m_sashPosition + m_sashSize;
 635             int y2 = m_borderSize;
 636             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 637             int h2 = h - 2*m_borderSize;
 638
 639             m_windowOne->SetSize(x1, y1, w1, h1);
 640             m_windowTwo->SetSize(x2, y2, w2, h2);
 641
 642         }
 643         else
 644         {
 645             m_windowOne->SetSize(m_borderSize, m_borderSize,
 646                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 647             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 648                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 649
 650         }
 651     }
 652     wxClientDC dc(this);
 653         if ( m_borderSize > 0 )
 654                 DrawBorders(dc);
 655     DrawSash(dc);
 656 }
 657
 658 // Set pane for unsplit window
 659 void wxSplitterWindow::Initialize(wxWindow *window)
 660 {
 661     m_windowOne = window;
 662     m_windowTwo = (wxWindow *) NULL;
 663     m_sashPosition = 0;
 664 }
 665
 666 // Associates the given window with window 2, drawing the appropriate sash
 667 // and changing the split mode.
 668 // Does nothing and returns FALSE if the window is already split.
 669 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 670 {
 671     if ( IsSplit() )
 672         return FALSE;
 673
 674     int w, h;
 675     GetClientSize(&w, &h);
 676
 677     m_splitMode = wxSPLIT_VERTICAL;
 678     m_windowOne = window1;
 679     m_windowTwo = window2;
 680     if ( sashPosition > 0 )
 681         m_sashPosition = sashPosition;
 682     else if ( sashPosition < 0 )
 683         m_sashPosition = w - sashPosition;
 684     else    // default
 685         m_sashPosition = w/2;
 686
 687     SizeWindows();
 688
 689     return TRUE;
 690 }
 691
 692 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 693 {
 694     if ( IsSplit() )
 695         return FALSE;
 696
 697     int w, h;
 698     GetClientSize(&w, &h);
 699
 700     m_splitMode = wxSPLIT_HORIZONTAL;
 701     m_windowOne = window1;
 702     m_windowTwo = window2;
 703     if ( sashPosition > 0 )
 704         m_sashPosition = sashPosition;
 705     else if ( sashPosition < 0 )
 706         m_sashPosition = h - sashPosition;
 707     else    // default
 708         m_sashPosition = h/2;
 709
 710     SizeWindows();
 711
 712     return TRUE;
 713 }
 714
 715
 716 // Remove the specified (or second) window from the view
 717 // Doesn't actually delete the window.
 718 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 719 {
 720     if ( ! IsSplit() )
 721         return FALSE;
 722
 723     wxWindow *win = NULL;
 724     if ( toRemove == NULL || toRemove == m_windowTwo)
 725     {
 726         win = m_windowTwo ;
 727         m_windowTwo = (wxWindow *) NULL;
 728     }
 729     else if ( toRemove == m_windowOne )
 730     {
 731         win = m_windowOne ;
 732         m_windowOne = m_windowTwo;
 733         m_windowTwo = (wxWindow *) NULL;
 734     }
 735     else
 736     {
 737         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 738
 739         return FALSE;
 740     }
 741
 742     SendUnsplitEvent(win);
 743     m_sashPosition = 0;
 744     SizeWindows();
 745
 746     return TRUE;
 747 }
 748
 749 // Replace a window with another one
 750 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 751 {
 752     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 753     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 754
 755     if ( winOld == m_windowTwo )
 756     {
 757         m_windowTwo = winNew;
 758     }
 759     else if ( winOld == m_windowOne )
 760     {
 761         m_windowOne = winNew;
 762     }
 763     else
 764     {
 765         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 766
 767         return FALSE;
 768     }
 769
 770     SizeWindows();
 771
 772     return TRUE;
 773 }
 774
 775 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 776 {
 777     m_sashPosition = position;
 778
 779     if ( redraw )
 780     {
 781         SizeWindows();
 782     }
 783 }
 784
 785 // Initialize colours
 786 void wxSplitterWindow::InitColours()
 787 {
 788     wxDELETE( m_facePen );
 789     wxDELETE( m_faceBrush );
 790     wxDELETE( m_mediumShadowPen );
 791     wxDELETE( m_darkShadowPen );
 792     wxDELETE( m_lightShadowPen );
 793     wxDELETE( m_hilightPen );
 794
 795     // Shadow colours
 796 #if defined(__WIN95__)
 797     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 798     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 799     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 800
 801     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 802     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 803
 804     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 805     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 806
 807     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 808     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 809
 810     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 811     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 812 #else // !Win32
 813     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 814     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 815     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 816     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 817     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 818     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 819 #endif // Win32/!Win32
 820 }
 821
 822 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 823 {
 824     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 825     event.m_data.win = winRemoved;
 826
 827     (void)GetEventHandler()->ProcessEvent(event);
 828 }
 829
 830 // ---------------------------------------------------------------------------
 831 // splitter event handlers
 832 // ---------------------------------------------------------------------------
 833
 834 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 835 {
 836     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 837     const int UNSPLIT_THRESHOLD = 4;
 838
 839     int newSashPosition = event.GetSashPosition();
 840
 841     // Obtain relevant window dimension for bottom / right threshold check
 842     int w, h;
 843     GetClientSize(&w, &h);
 844     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 845
 846     bool unsplit_scenario = FALSE;
 847     if ( m_permitUnsplitAlways
 848             || m_minimumPaneSize == 0 )
 849     {
 850         // Do edge detection if unsplit premitted
 851         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 852         {
 853             // threshold top / left check
 854             newSashPosition = 0;
 855             unsplit_scenario = TRUE;
 856         }
 857         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 858         {
 859             // threshold bottom/right check
 860             newSashPosition = window_size;
 861             unsplit_scenario = TRUE;
 862         }
 863     }
 864
 865     if ( !unsplit_scenario )
 866     {
 867         // If resultant pane would be too small, enlarge it
 868         if ( newSashPosition < m_minimumPaneSize )
 869             newSashPosition = m_minimumPaneSize;
 870         if ( newSashPosition > window_size - m_minimumPaneSize )
 871             newSashPosition = window_size - m_minimumPaneSize;
 872     }
 873
 874     // If the result is out of bounds it means minimum size is too big,
 875     // so split window in half as best compromise.
 876     if ( newSashPosition < 0 || newSashPosition > window_size )
 877         newSashPosition = window_size / 2;
 878
 879     // for compatibility, call the virtual function
 880     if ( !OnSashPositionChange(newSashPosition) )
 881     {
 882         newSashPosition = -1;
 883     }
 884
 885     event.SetSashPosition(newSashPosition);
 886 }
 887
 888 // Called when the sash is double-clicked. The default behaviour is to remove
 889 // the sash if the minimum pane size is zero.
 890 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 891 {
 892     // for compatibility, call the virtual function
 893     OnDoubleClickSash(event.GetX(), event.GetY());
 894
 895     if ( GetMinimumPaneSize() == 0
 896         || m_permitUnsplitAlways)
 897     {
 898         Unsplit();
 899     }
 900 }
 901
 902 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 903 {
 904     wxWindow *win = event.GetWindowBeingRemoved();
 905
 906     // for compatibility, call the virtual function
 907     OnUnsplit(win);
 908
 909     win->Show(FALSE);
 910 }