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 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED)
  38 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING)
  39 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED)
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_UNSPLIT)
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  43 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
  44
  45 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  46     EVT_PAINT(wxSplitterWindow::OnPaint)
  47     EVT_SIZE(wxSplitterWindow::OnSize)
  48     EVT_IDLE(wxSplitterWindow::OnIdle)
  49     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  50
  51     EVT_SET_CURSOR(wxSplitterWindow::OnSetCursor)
  52
  53     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  54     // NB: we borrow OnSashPosChanged for purposes of
  55     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  56     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  57     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  58     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  59
  60     WX_EVENT_TABLE_CONTROL_CONTAINER(wxSplitterWindow)
  61 END_EVENT_TABLE()
  62
  63 WX_DELEGATE_TO_CONTROL_CONTAINER(wxSplitterWindow);
  64
  65 bool wxSplitterWindow::Create(wxWindow *parent, wxWindowID id,
  66                                    const wxPoint& pos,
  67                                    const wxSize& size,
  68                                    long style,
  69                                    const wxString& name)
  70 {
  71     // allow TABbing from one window to the other
  72     style |= wxTAB_TRAVERSAL;
  73
  74     if (!wxWindow::Create(parent, id, pos, size, style, name))
  75         return FALSE;
  76
  77     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  78
  79     if ( style & wxSP_3DSASH )
  80         m_sashSize = 7;
  81     else
  82         m_sashSize = 3;
  83
  84     if ( style & wxSP_3DBORDER )
  85         m_borderSize = 2;
  86     else if ( style & wxSP_BORDER )
  87         m_borderSize = 1;
  88     else
  89         m_borderSize = 0;
  90
  91     return TRUE;
  92 }
  93
  94 void wxSplitterWindow::Init()
  95 {
  96     m_container.SetContainerWindow(this);
  97
  98     m_splitMode = wxSPLIT_VERTICAL;
  99     m_permitUnsplitAlways = TRUE;
 100     m_windowOne = (wxWindow *) NULL;
 101     m_windowTwo = (wxWindow *) NULL;
 102     m_dragMode = wxSPLIT_DRAG_NONE;
 103     m_oldX = 0;
 104     m_oldY = 0;
 105     m_firstX = 0;
 106     m_firstY = 0;
 107     m_sashSize = 7;
 108     m_borderSize = 2;
 109     m_sashPosition = 0;
 110     m_minimumPaneSize = 0;
 111     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 112     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 113     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 114     m_lightShadowPen = (wxPen *) NULL;
 115     m_mediumShadowPen = (wxPen *) NULL;
 116     m_darkShadowPen = (wxPen *) NULL;
 117     m_faceBrush = (wxBrush *) NULL;
 118     m_facePen = (wxPen *) NULL;
 119     m_hilightPen = (wxPen *) NULL;
 120
 121     m_borderSize = 0;
 122     m_sashSize = 3;
 123
 124     InitColours();
 125
 126     m_needUpdating = FALSE;
 127 }
 128
 129 wxSplitterWindow::~wxSplitterWindow()
 130 {
 131     delete m_sashCursorWE;
 132     delete m_sashCursorNS;
 133     delete m_sashTrackerPen;
 134     delete m_lightShadowPen;
 135     delete m_darkShadowPen;
 136     delete m_mediumShadowPen;
 137     delete m_hilightPen;
 138     delete m_facePen;
 139     delete m_faceBrush;
 140 }
 141
 142 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 143 {
 144     wxPaintDC dc(this);
 145
 146     if ( m_borderSize > 0 )
 147         DrawBorders(dc);
 148     DrawSash(dc);
 149 }
 150
 151 void wxSplitterWindow::OnIdle(wxIdleEvent& event)
 152 {
 153     if (m_needUpdating)
 154         SizeWindows();
 155
 156     event.Skip();
 157 }
 158
 159 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 160 {
 161     wxCoord x = (wxCoord)event.GetX(),
 162             y = (wxCoord)event.GetY();
 163
 164     // reset the cursor
 165 #ifdef __WXMOTIF__
 166     SetCursor(* wxSTANDARD_CURSOR);
 167 #endif
 168 #ifdef __WXMSW__
 169     SetCursor(wxCursor());
 170 #endif
 171
 172     if (GetWindowStyle() & wxSP_NOSASH)
 173         return;
 174
 175     if (event.LeftDown())
 176     {
 177         if ( SashHitTest(x, y) )
 178         {
 179             CaptureMouse();
 180
 181             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 182
 183             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 184             {
 185                 DrawSashTracker(x, y);
 186             }
 187
 188             m_oldX = x;
 189             m_oldY = y;
 190
 191             if ( m_splitMode == wxSPLIT_VERTICAL )
 192             {
 193                 SetCursor(*m_sashCursorWE);
 194             }
 195             else
 196             {
 197                 SetCursor(*m_sashCursorNS);
 198             }
 199             return;
 200         }
 201     }
 202     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 203     {
 204         // We can stop dragging now and see what we've got.
 205         m_dragMode = wxSPLIT_DRAG_NONE;
 206         ReleaseMouse();
 207
 208         // Erase old tracker
 209         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 210         {
 211             DrawSashTracker(m_oldX, m_oldY);
 212         }
 213
 214         // Obtain window size. We are only interested in the dimension the sash
 215         // splits up
 216         int w, h;
 217         GetClientSize(&w, &h);
 218         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 219         int new_sash_position =
 220             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 221
 222         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 223                                       this);
 224         eventSplitter.m_data.pos = new_sash_position;
 225         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 226         {
 227             new_sash_position = eventSplitter.GetSashPosition();
 228             if ( new_sash_position == -1 )
 229             {
 230                 // change not allowed
 231                 return;
 232             }
 233         }
 234
 235         if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 236         {
 237             // Deal with possible unsplit scenarios
 238             if ( new_sash_position == 0 )
 239             {
 240                 // We remove the first window from the view
 241                 wxWindow *removedWindow = m_windowOne;
 242                 m_windowOne = m_windowTwo;
 243                 m_windowTwo = (wxWindow *) NULL;
 244                 SendUnsplitEvent(removedWindow);
 245                 m_sashPosition = 0;
 246             }
 247             else if ( new_sash_position == window_size )
 248             {
 249                 // We remove the second window from the view
 250                 wxWindow *removedWindow = m_windowTwo;
 251                 m_windowTwo = (wxWindow *) NULL;
 252                 SendUnsplitEvent(removedWindow);
 253                 m_sashPosition = 0;
 254             }
 255             else
 256             {
 257                 m_sashPosition = new_sash_position;
 258             }
 259         }
 260         else
 261         {
 262             m_sashPosition = new_sash_position;
 263         }
 264
 265         SizeWindows();
 266     }  // left up && dragging
 267     else if (event.Moving() && !event.Dragging())
 268     {
 269         // Just change the cursor if required
 270         if ( SashHitTest(x, y) )
 271         {
 272                 if ( m_splitMode == wxSPLIT_VERTICAL )
 273                 {
 274                     SetCursor(*m_sashCursorWE);
 275                 }
 276                 else
 277                 {
 278                     SetCursor(*m_sashCursorNS);
 279                 }
 280         }
 281 #if defined(__WXGTK__) || defined(__WXMSW__)
 282         else
 283         {
 284             // We must set the normal cursor in MSW, because
 285             // if the child window doesn't have a cursor, the
 286             // parent's (splitter window) will be used, and this
 287             // must be the standard cursor.
 288
 289             // where else do we unset the cursor?
 290             SetCursor(* wxSTANDARD_CURSOR);
 291         }
 292 #endif // __WXGTK__
 293     }
 294     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 295     {
 296 #ifdef __WXMSW__
 297         // Otherwise, the cursor sometimes reverts to the normal cursor
 298         // during dragging.
 299         if ( m_splitMode == wxSPLIT_VERTICAL )
 300         {
 301             SetCursor(*m_sashCursorWE);
 302         }
 303         else
 304         {
 305             SetCursor(*m_sashCursorNS);
 306         }
 307 #endif
 308
 309         // Obtain window size. We are only interested in the dimension the sash
 310         // splits up
 311         int new_sash_position =
 312             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 313
 314         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 315                                       this);
 316         eventSplitter.m_data.pos = new_sash_position;
 317         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 318         {
 319             new_sash_position = eventSplitter.GetSashPosition();
 320             if ( new_sash_position == -1 )
 321             {
 322                 // change not allowed
 323                 return;
 324             }
 325         }
 326
 327         if (new_sash_position == m_sashPosition)
 328             return;
 329
 330         // Erase old tracker
 331         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 332         {
 333             DrawSashTracker(m_oldX, m_oldY);
 334         }
 335
 336         if (m_splitMode == wxSPLIT_VERTICAL)
 337             x = new_sash_position;
 338         else
 339             y = new_sash_position;
 340
 341         // Remember old positions
 342         m_oldX = x;
 343         m_oldY = y;
 344
 345 #ifdef __WXMSW__
 346         // As we captured the mouse, we may get the mouse events from outside
 347         // our window - for example, negative values in x, y. This has a weird
 348         // consequence under MSW where we use unsigned values sometimes and
 349         // signed ones other times: the coordinates turn as big positive
 350         // numbers and so the sash is drawn on the *right* side of the window
 351         // instead of the left (or bottom instead of top). Correct this.
 352         if ( (short)m_oldX < 0 )
 353             m_oldX = 0;
 354         if ( (short)m_oldY < 0 )
 355             m_oldY = 0;
 356 #endif // __WXMSW__
 357
 358         // Draw new one
 359         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 360         {
 361             DrawSashTracker(m_oldX, m_oldY);
 362         }
 363         else
 364         {
 365             m_sashPosition = new_sash_position;
 366             m_needUpdating = TRUE;
 367         }
 368     }
 369     else if ( event.LeftDClick() )
 370     {
 371         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 372                                       this);
 373         eventSplitter.m_data.pt.x = x;
 374         eventSplitter.m_data.pt.y = y;
 375
 376         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 377     }
 378 }
 379
 380 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 381 {
 382     // only process this message if we're not iconized - otherwise iconizing
 383     // and restoring a window containing the splitter has a funny side effect
 384     // of changing the splitter position!
 385     wxWindow *parent = GetParent();
 386     while ( parent && !parent->IsTopLevel() )
 387     {
 388         parent = parent->GetParent();
 389     }
 390
 391     bool iconized = FALSE;
 392     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 393     if ( frame )
 394         iconized = frame->IsIconized();
 395     else
 396     {
 397         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 398         if ( dialog )
 399             iconized = dialog->IsIconized();
 400         else
 401             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 402     }
 403
 404     if ( iconized )
 405     {
 406         event.Skip();
 407     }
 408     else
 409     {
 410         int cw, ch;
 411         GetClientSize( &cw, &ch );
 412         if ( m_windowTwo )
 413         {
 414             if ( m_splitMode == wxSPLIT_VERTICAL )
 415             {
 416                 if ( m_sashPosition >= (cw - 5) )
 417                     m_sashPosition = wxMax(10, cw - 40);
 418             }
 419             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 420             {
 421                 if ( m_sashPosition >= (ch - 5) )
 422                     m_sashPosition = wxMax(10, ch - 40);
 423             }
 424         }
 425
 426         SizeWindows();
 427     }
 428 }
 429
 430 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 431 {
 432     if ( m_windowTwo == NULL || m_sashPosition == 0)
 433         return FALSE; // No sash
 434
 435     if ( m_splitMode == wxSPLIT_VERTICAL )
 436     {
 437         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 438             return TRUE;
 439         else
 440             return FALSE;
 441     }
 442     else
 443     {
 444         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 445             return TRUE;
 446         else
 447             return FALSE;
 448     }
 449 }
 450
 451 // Draw 3D effect borders
 452 void wxSplitterWindow::DrawBorders(wxDC& dc)
 453 {
 454     int w, h;
 455     GetClientSize(&w, &h);
 456
 457     if ( GetWindowStyleFlag() & wxSP_3DBORDER )
 458     {
 459
 460         dc.SetPen(*m_facePen);
 461         dc.SetBrush(*m_faceBrush);
 462         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 463         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 464         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 465         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 466
 467         dc.SetPen(*m_mediumShadowPen);
 468         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 469         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 470
 471         dc.SetPen(*m_darkShadowPen);
 472         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 473         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 474
 475         dc.SetPen(*m_hilightPen);
 476         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 477         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.
 478                                      /// Anyway, h is required for MSW.
 479
 480         dc.SetPen(*m_lightShadowPen);
 481         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 482         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 483     }
 484     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 485     {
 486         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 487         dc.SetPen(*wxBLACK_PEN);
 488         dc.DrawRectangle(0, 0, w-1, h-1);
 489     }
 490
 491     dc.SetPen(wxNullPen);
 492     dc.SetBrush(wxNullBrush);
 493 }
 494
 495 // Draw the sash
 496 void wxSplitterWindow::DrawSash(wxDC& dc)
 497 {
 498     if ( m_sashPosition == 0 || !m_windowTwo)
 499         return;
 500     if (GetWindowStyle() & wxSP_NOSASH)
 501         return;
 502
 503     int w, h;
 504     GetClientSize(&w, &h);
 505
 506     if ( GetWindowStyleFlag() & wxSP_3DSASH )
 507     {
 508         if ( m_splitMode == wxSPLIT_VERTICAL )
 509         {
 510             dc.SetPen(*m_facePen);
 511             dc.SetBrush(*m_faceBrush);
 512             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 513
 514             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 515
 516             dc.SetPen(*m_lightShadowPen);
 517             int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 518             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 519
 520             dc.SetPen(*m_hilightPen);
 521             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 522
 523             dc.SetPen(*m_mediumShadowPen);
 524                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 525             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 526
 527             dc.SetPen(*m_darkShadowPen);
 528             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 529
 530             // Draw the top and bottom edges of the sash, if requested
 531             if (GetWindowStyle() & wxSP_FULLSASH)
 532             {
 533                 // Top
 534                 dc.SetPen(*m_hilightPen);
 535                 dc.DrawLine(m_sashPosition+1, m_borderSize, m_sashPosition+m_sashSize-1, m_borderSize);
 536
 537                 // Bottom
 538                 dc.SetPen(*m_darkShadowPen);
 539                 dc.DrawLine(m_sashPosition+1, h-m_borderSize-1, m_sashPosition+m_sashSize-1, h-m_borderSize-1);
 540             }
 541         }
 542         else
 543         {
 544             dc.SetPen(*m_facePen);
 545             dc.SetBrush(*m_faceBrush);
 546             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 547
 548             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 549
 550             dc.SetPen(*m_lightShadowPen);
 551             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 552
 553             dc.SetPen(*m_hilightPen);
 554             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 555
 556             dc.SetPen(*m_mediumShadowPen);
 557             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 558
 559             dc.SetPen(*m_darkShadowPen);
 560             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 561
 562             // Draw the left and right edges of the sash, if requested
 563             if (GetWindowStyle() & wxSP_FULLSASH)
 564             {
 565                 // Left
 566                 dc.SetPen(*m_hilightPen);
 567                 dc.DrawLine(m_borderSize, m_sashPosition, m_borderSize, m_sashPosition+m_sashSize);
 568
 569                 // Right
 570                 dc.SetPen(*m_darkShadowPen);
 571                 dc.DrawLine(w-m_borderSize-1, m_sashPosition+1, w-m_borderSize-1, m_sashPosition+m_sashSize-1);
 572             }
 573         }
 574     }
 575     else
 576     {
 577         if ( m_splitMode == wxSPLIT_VERTICAL )
 578         {
 579             dc.SetPen(*wxBLACK_PEN);
 580             dc.SetBrush(*wxBLACK_BRUSH);
 581             int h1 = h-1;
 582             int y1 = 0;
 583             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 584                 h1 += 1; // Not sure why this is necessary...
 585             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 586             {
 587                 y1 = 2; h1 -= 3;
 588             }
 589             dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 590         }
 591         else
 592         {
 593             dc.SetPen(*wxBLACK_PEN);
 594             dc.SetBrush(*wxBLACK_BRUSH);
 595             int w1 = w-1;
 596             int x1 = 0;
 597             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 598                 w1 ++;
 599             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 600             {
 601                 x1 = 2; w1 -= 3;
 602             }
 603             dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 604         }
 605
 606     }
 607
 608     dc.SetPen(wxNullPen);
 609     dc.SetBrush(wxNullBrush);
 610 }
 611
 612 // Draw the sash tracker (for whilst moving the sash)
 613 void wxSplitterWindow::DrawSashTracker(int x, int y)
 614 {
 615     int w, h;
 616     GetClientSize(&w, &h);
 617
 618     wxScreenDC screenDC;
 619     int x1, y1;
 620     int x2, y2;
 621
 622     if ( m_splitMode == wxSPLIT_VERTICAL )
 623     {
 624         x1 = x; y1 = 2;
 625         x2 = x; y2 = h-2;
 626
 627         if ( x1 > w )
 628         {
 629             x1 = w; x2 = w;
 630         }
 631         else if ( x1 < 0 )
 632         {
 633             x1 = 0; x2 = 0;
 634         }
 635     }
 636     else
 637     {
 638         x1 = 2; y1 = y;
 639         x2 = w-2; y2 = y;
 640
 641         if ( y1 > h )
 642         {
 643             y1 = h;
 644             y2 = h;
 645         }
 646         else if ( y1 < 0 )
 647         {
 648             y1 = 0;
 649             y2 = 0;
 650         }
 651     }
 652
 653     ClientToScreen(&x1, &y1);
 654     ClientToScreen(&x2, &y2);
 655
 656     screenDC.SetLogicalFunction(wxINVERT);
 657     screenDC.SetPen(*m_sashTrackerPen);
 658     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 659
 660     screenDC.DrawLine(x1, y1, x2, y2);
 661
 662     screenDC.SetLogicalFunction(wxCOPY);
 663
 664     screenDC.SetPen(wxNullPen);
 665     screenDC.SetBrush(wxNullBrush);
 666 }
 667
 668 // Position and size subwindows.
 669 // Note that the border size applies to each subwindow, not
 670 // including the edges next to the sash.
 671 void wxSplitterWindow::SizeWindows()
 672 {
 673     int w, h;
 674     GetClientSize(&w, &h);
 675
 676     if ( GetWindow1() && !GetWindow2() )
 677     {
 678         GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(), w - 2*GetBorderSize(), h - 2*GetBorderSize());
 679
 680     }
 681     else if ( GetWindow1() && GetWindow2() )
 682     {
 683         if (GetSplitMode() == wxSPLIT_VERTICAL)
 684         {
 685             int x1 = GetBorderSize();
 686             int y1 = GetBorderSize();
 687             int w1 = GetSashPosition() - GetBorderSize();
 688             int h1 = h - 2*GetBorderSize();
 689
 690             int x2 = GetSashPosition() + GetSashSize();
 691             int y2 = GetBorderSize();
 692             int w2 = w - 2*GetBorderSize() - GetSashSize() - w1;
 693             int h2 = h - 2*GetBorderSize();
 694
 695             GetWindow1()->SetSize(x1, y1, w1, h1);
 696             GetWindow2()->SetSize(x2, y2, w2, h2);
 697         }
 698         else
 699         {
 700             GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 701                 w - 2*GetBorderSize(), GetSashPosition() - GetBorderSize());
 702             GetWindow2()->SetSize(GetBorderSize(), GetSashPosition() + GetSashSize(),
 703                 w - 2*GetBorderSize(), h - 2*GetBorderSize() - GetSashSize() - (GetSashPosition() - GetBorderSize()));
 704         }
 705     }
 706     wxClientDC dc(this);
 707     if ( GetBorderSize() > 0 )
 708         DrawBorders(dc);
 709     DrawSash(dc);
 710
 711     SetNeedUpdating(FALSE);
 712 }
 713
 714 // Set pane for unsplit window
 715 void wxSplitterWindow::Initialize(wxWindow *window)
 716 {
 717     m_windowOne = window;
 718     m_windowTwo = (wxWindow *) NULL;
 719     m_sashPosition = 0;
 720 }
 721
 722 // Associates the given window with window 2, drawing the appropriate sash
 723 // and changing the split mode.
 724 // Does nothing and returns FALSE if the window is already split.
 725 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 726 {
 727     if ( IsSplit() )
 728         return FALSE;
 729
 730     int w, h;
 731     GetClientSize(&w, &h);
 732
 733     m_splitMode = wxSPLIT_VERTICAL;
 734     m_windowOne = window1;
 735     m_windowTwo = window2;
 736     if ( sashPosition > 0 )
 737         m_sashPosition = sashPosition;
 738     else if ( sashPosition < 0 )
 739         m_sashPosition = w + sashPosition;   // It's negative so adding is subtracting
 740     else    // default
 741         m_sashPosition = w/2;
 742
 743     SizeWindows();
 744
 745     return TRUE;
 746 }
 747
 748 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 749 {
 750     if ( IsSplit() )
 751         return FALSE;
 752
 753     int w, h;
 754     GetClientSize(&w, &h);
 755
 756     m_splitMode = wxSPLIT_HORIZONTAL;
 757     m_windowOne = window1;
 758     m_windowTwo = window2;
 759     if ( sashPosition > 0 )
 760         m_sashPosition = sashPosition;
 761     else if ( sashPosition < 0 )
 762         m_sashPosition = h + sashPosition; // It's negative so adding is subtracting
 763     else    // default
 764         m_sashPosition = h/2;
 765
 766     SizeWindows();
 767
 768     return TRUE;
 769 }
 770
 771
 772 // Remove the specified (or second) window from the view
 773 // Doesn't actually delete the window.
 774 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 775 {
 776     if ( ! IsSplit() )
 777         return FALSE;
 778
 779     wxWindow *win = NULL;
 780     if ( toRemove == NULL || toRemove == m_windowTwo)
 781     {
 782         win = m_windowTwo ;
 783         m_windowTwo = (wxWindow *) NULL;
 784     }
 785     else if ( toRemove == m_windowOne )
 786     {
 787         win = m_windowOne ;
 788         m_windowOne = m_windowTwo;
 789         m_windowTwo = (wxWindow *) NULL;
 790     }
 791     else
 792     {
 793         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 794
 795         return FALSE;
 796     }
 797
 798     SendUnsplitEvent(win);
 799     m_sashPosition = 0;
 800     SizeWindows();
 801
 802     return TRUE;
 803 }
 804
 805 // Replace a window with another one
 806 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 807 {
 808     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 809     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 810
 811     if ( winOld == m_windowTwo )
 812     {
 813         m_windowTwo = winNew;
 814     }
 815     else if ( winOld == m_windowOne )
 816     {
 817         m_windowOne = winNew;
 818     }
 819     else
 820     {
 821         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 822
 823         return FALSE;
 824     }
 825
 826     SizeWindows();
 827
 828     return TRUE;
 829 }
 830
 831 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 832 {
 833     m_sashPosition = position;
 834
 835     if ( redraw )
 836     {
 837         SizeWindows();
 838     }
 839 }
 840
 841 // Initialize colours
 842 void wxSplitterWindow::InitColours()
 843 {
 844     wxDELETE( m_facePen );
 845     wxDELETE( m_faceBrush );
 846     wxDELETE( m_mediumShadowPen );
 847     wxDELETE( m_darkShadowPen );
 848     wxDELETE( m_lightShadowPen );
 849     wxDELETE( m_hilightPen );
 850
 851     // Shadow colours
 852 #ifndef __WIN16__
 853     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 854     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 855     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 856
 857     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 858     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 859
 860     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 861     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 862
 863     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 864     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 865
 866     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 867     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 868 #else
 869     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 870     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 871     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 872     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 873     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 874     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 875 #endif // __WIN16__
 876 }
 877
 878 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 879 {
 880     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 881     event.m_data.win = winRemoved;
 882
 883     (void)GetEventHandler()->ProcessEvent(event);
 884 }
 885
 886 // ---------------------------------------------------------------------------
 887 // splitter event handlers
 888 // ---------------------------------------------------------------------------
 889
 890 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 891 {
 892     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 893     const int UNSPLIT_THRESHOLD = 4;
 894
 895     int newSashPosition = event.GetSashPosition();
 896
 897     // Obtain relevant window dimension for bottom / right threshold check
 898     int w, h;
 899     GetClientSize(&w, &h);
 900     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 901
 902     bool unsplit_scenario = FALSE;
 903     if ( m_permitUnsplitAlways
 904             || m_minimumPaneSize == 0 )
 905     {
 906         // Do edge detection if unsplit premitted
 907         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 908         {
 909             // threshold top / left check
 910             newSashPosition = 0;
 911             unsplit_scenario = TRUE;
 912         }
 913         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 914         {
 915             // threshold bottom/right check
 916             newSashPosition = window_size;
 917             unsplit_scenario = TRUE;
 918         }
 919     }
 920
 921     if ( !unsplit_scenario )
 922     {
 923         // If resultant pane would be too small, enlarge it
 924         if ( newSashPosition < m_minimumPaneSize )
 925             newSashPosition = m_minimumPaneSize;
 926         if ( newSashPosition > window_size - m_minimumPaneSize )
 927             newSashPosition = window_size - m_minimumPaneSize;
 928     }
 929
 930     // If the result is out of bounds it means minimum size is too big,
 931     // so split window in half as best compromise.
 932     if ( newSashPosition < 0 || newSashPosition > window_size )
 933         newSashPosition = window_size / 2;
 934
 935     // for compatibility, call the virtual function
 936     if ( !OnSashPositionChange(newSashPosition) )
 937     {
 938         newSashPosition = -1;
 939     }
 940
 941     event.SetSashPosition(newSashPosition);
 942 }
 943
 944 // Called when the sash is double-clicked. The default behaviour is to remove
 945 // the sash if the minimum pane size is zero.
 946 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 947 {
 948     // for compatibility, call the virtual function
 949     OnDoubleClickSash(event.GetX(), event.GetY());
 950
 951     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 952     {
 953         Unsplit();
 954     }
 955 }
 956
 957 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 958 {
 959     wxWindow *win = event.GetWindowBeingRemoved();
 960
 961     // do it before calling OnUnsplit() which may delete the window
 962     win->Show(FALSE);
 963
 964     // for compatibility, call the virtual function
 965     OnUnsplit(win);
 966 }
 967
 968 #if defined(__WXMSW__)
 969     #define WXUNUSED_UNLESS_MSW(identifier)    identifier
 970 #else
 971     #define WXUNUSED_UNLESS_MSW(identifier)    WXUNUSED(identifier)
 972 #endif
 973
 974 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& WXUNUSED_UNLESS_MSW(event))
 975 {
 976     // this is currently called (and needed) under MSW only...
 977 #ifdef __WXMSW__
 978
 979     // if we don't do it, the resizing cursor might be set for child window:
 980     // and like this we explicitly say that our cursor should not be used for
 981     // children windows which overlap us
 982
 983     if ( SashHitTest(event.GetX(), event.GetY()) )
 984     {
 985         // default processing is ok
 986         event.Skip();
 987     }
 988     //else: do nothing, in particular, don't call Skip()
 989 #endif // wxMSW
 990 }