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
  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_SET_CURSOR(wxSplitterWindow::OnSetCursor)
  46
  47     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  48     // NB: we borrow OnSashPosChanged for purposes of
  49     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  50     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  51     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  52     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  53 END_EVENT_TABLE()
  54
  55 wxSplitterWindow::wxSplitterWindow()
  56 {
  57     m_splitMode = wxSPLIT_VERTICAL;
  58     m_permitUnsplitAlways = FALSE;
  59     m_windowOne = (wxWindow *) NULL;
  60     m_windowTwo = (wxWindow *) NULL;
  61     m_dragMode = wxSPLIT_DRAG_NONE;
  62     m_oldX = 0;
  63     m_oldY = 0;
  64     m_firstX = 0;
  65     m_firstY = 0;
  66     m_sashSize = 7;
  67     m_borderSize = 2;
  68     m_sashPosition = 0;
  69     m_sashCursorWE = (wxCursor *) NULL;
  70     m_sashCursorNS = (wxCursor *) NULL;
  71     m_sashTrackerPen = (wxPen *) NULL;
  72     m_lightShadowPen = (wxPen *) NULL;
  73     m_mediumShadowPen = (wxPen *) NULL;
  74     m_darkShadowPen = (wxPen *) NULL;
  75     m_faceBrush = (wxBrush *) NULL;
  76     m_facePen = (wxPen *) NULL;
  77     m_hilightPen = (wxPen *) NULL;
  78     m_minimumPaneSize = 0;
  79     m_needUpdating = FALSE;
  80 }
  81
  82 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  83                                    const wxPoint& pos,
  84                                    const wxSize& size,
  85                                    long style,
  86                                    const wxString& name)
  87                 : wxWindow(parent, id, pos, size, style, name)
  88 {
  89     m_splitMode = wxSPLIT_VERTICAL;
  90     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  91     m_windowOne = (wxWindow *) NULL;
  92     m_windowTwo = (wxWindow *) NULL;
  93     m_dragMode = wxSPLIT_DRAG_NONE;
  94     m_oldX = 0;
  95     m_oldY = 0;
  96     m_firstX = 0;
  97     m_firstY = 0;
  98     m_sashSize = 7;
  99     m_borderSize = 2;
 100     m_sashPosition = 0;
 101     m_minimumPaneSize = 0;
 102     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 103     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 104     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 105     m_lightShadowPen = (wxPen *) NULL;
 106     m_mediumShadowPen = (wxPen *) NULL;
 107     m_darkShadowPen = (wxPen *) NULL;
 108     m_faceBrush = (wxBrush *) NULL;
 109     m_facePen = (wxPen *) NULL;
 110     m_hilightPen = (wxPen *) NULL;
 111
 112     if ( style & wxSP_3D )
 113     {
 114         m_borderSize = 2;
 115         m_sashSize = 7;
 116     }
 117     else if ( style & wxSP_BORDER )
 118     {
 119         m_borderSize = 1;
 120         m_sashSize = 3;
 121     }
 122     else
 123     {
 124         m_borderSize = 0;
 125         m_sashSize = 3;
 126     }
 127
 128     // Eventually, we'll respond to colour change messages
 129     InitColours();
 130
 131     // For debugging purposes, to see the background.
 132 //    SetBackground(wxBLUE_BRUSH);
 133
 134     m_needUpdating = FALSE;
 135 }
 136
 137 wxSplitterWindow::~wxSplitterWindow()
 138 {
 139     delete m_sashCursorWE;
 140     delete m_sashCursorNS;
 141     delete m_sashTrackerPen;
 142     delete m_lightShadowPen;
 143     delete m_darkShadowPen;
 144     delete m_mediumShadowPen;
 145     delete m_hilightPen;
 146     delete m_facePen;
 147     delete m_faceBrush;
 148 }
 149
 150 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 151 {
 152     wxPaintDC dc(this);
 153
 154     if ( m_borderSize > 0 )
 155         DrawBorders(dc);
 156     DrawSash(dc);
 157 }
 158
 159 void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 160 {
 161     if (m_needUpdating)
 162         SizeWindows();
 163 }
 164
 165 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 166 {
 167     wxCoord x = (wxCoord)event.GetX(),
 168             y = (wxCoord)event.GetY();
 169
 170     // reset the cursor
 171 #ifdef __WXMOTIF__
 172     SetCursor(* wxSTANDARD_CURSOR);
 173 #endif
 174 #ifdef __WXMSW__
 175     SetCursor(wxCursor());
 176 #endif
 177
 178
 179     if (event.LeftDown())
 180     {
 181         if ( SashHitTest(x, y) )
 182         {
 183             CaptureMouse();
 184
 185             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 186
 187             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 188             {
 189                 DrawSashTracker(x, y);
 190             }
 191
 192             m_oldX = x;
 193             m_oldY = y;
 194
 195             if ( m_splitMode == wxSPLIT_VERTICAL )
 196             {
 197                 SetCursor(*m_sashCursorWE);
 198             }
 199             else
 200             {
 201                 SetCursor(*m_sashCursorNS);
 202             }
 203             return;
 204         }
 205     }
 206     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 207     {
 208         // We can stop dragging now and see what we've got.
 209         m_dragMode = wxSPLIT_DRAG_NONE;
 210         ReleaseMouse();
 211
 212         // Erase old tracker
 213         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 214         {
 215             DrawSashTracker(m_oldX, m_oldY);
 216         }
 217
 218         // Obtain window size. We are only interested in the dimension the sash
 219         // splits up
 220         int w, h;
 221         GetClientSize(&w, &h);
 222         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 223         int new_sash_position =
 224             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 225
 226         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 227                                       this);
 228         eventSplitter.m_data.pos = new_sash_position;
 229         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 230         {
 231             new_sash_position = eventSplitter.GetSashPosition();
 232             if ( new_sash_position == -1 )
 233             {
 234                 // change not allowed
 235                 return;
 236             }
 237         }
 238
 239         if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 240         {
 241             // Deal with possible unsplit scenarios
 242             if ( new_sash_position == 0 )
 243             {
 244                 // We remove the first window from the view
 245                 wxWindow *removedWindow = m_windowOne;
 246                 m_windowOne = m_windowTwo;
 247                 m_windowTwo = (wxWindow *) NULL;
 248                 SendUnsplitEvent(removedWindow);
 249                 m_sashPosition = 0;
 250             }
 251             else if ( new_sash_position == window_size )
 252             {
 253                 // We remove the second window from the view
 254                 wxWindow *removedWindow = m_windowTwo;
 255                 m_windowTwo = (wxWindow *) NULL;
 256                 SendUnsplitEvent(removedWindow);
 257                 m_sashPosition = 0;
 258             }
 259             else
 260             {
 261                 m_sashPosition = new_sash_position;
 262             }
 263         }
 264         else
 265         {
 266             m_sashPosition = new_sash_position;
 267         }
 268
 269         SizeWindows();
 270         m_needUpdating = FALSE;
 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 #ifdef __WXGTK__
 287         else
 288         {
 289             // where else do we unset the cursor?
 290             SetCursor(* wxSTANDARD_CURSOR);
 291         }
 292 #endif // __WXGTK__
 293
 294         m_needUpdating = FALSE;
 295     }
 296     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 297     {
 298 #ifdef __WXMSW__
 299         // Otherwise, the cursor sometimes reverts to the normal cursor
 300         // during dragging.
 301         if ( m_splitMode == wxSPLIT_VERTICAL )
 302         {
 303             SetCursor(*m_sashCursorWE);
 304         }
 305         else
 306         {
 307             SetCursor(*m_sashCursorNS);
 308         }
 309 #endif
 310
 311         // Obtain window size. We are only interested in the dimension the sash
 312         // splits up
 313         int new_sash_position =
 314             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 315
 316         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 317                                       this);
 318         eventSplitter.m_data.pos = new_sash_position;
 319         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 320         {
 321             new_sash_position = eventSplitter.GetSashPosition();
 322             if ( new_sash_position == -1 )
 323             {
 324                 // change not allowed
 325                 return;
 326             }
 327         }
 328
 329         // Erase old tracker
 330         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 331         {
 332             DrawSashTracker(m_oldX, m_oldY);
 333         }
 334
 335         if (m_splitMode == wxSPLIT_VERTICAL)
 336             x = new_sash_position;
 337         else
 338             y = new_sash_position;
 339
 340         if (new_sash_position != -1)
 341         {
 342             // Only modify if permitted
 343             m_oldX = x;
 344             m_oldY = y;
 345         }
 346
 347 #ifdef __WXMSW__
 348         // As we captured the mouse, we may get the mouse events from outside
 349         // our window - for example, negative values in x, y. This has a weird
 350         // consequence under MSW where we use unsigned values sometimes and
 351         // signed ones other times: the coordinates turn as big positive
 352         // numbers and so the sash is drawn on the *right* side of the window
 353         // instead of the left (or bottom instead of top). Correct this.
 354         if ( (short)m_oldX < 0 )
 355             m_oldX = 0;
 356         if ( (short)m_oldY < 0 )
 357             m_oldY = 0;
 358 #endif // __WXMSW__
 359
 360         // Draw new one
 361         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 362         {
 363             DrawSashTracker(m_oldX, m_oldY);
 364         }
 365         else
 366         {
 367             m_sashPosition = new_sash_position;
 368             m_needUpdating = TRUE;
 369         }
 370     }
 371     else if ( event.LeftDClick() )
 372     {
 373         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 374                                       this);
 375         eventSplitter.m_data.pt.x = x;
 376         eventSplitter.m_data.pt.y = y;
 377
 378         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 379     }
 380 }
 381
 382 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 383 {
 384     // only process this message if we're not iconized - otherwise iconizing
 385     // and restoring a window containing the splitter has a funny side effect
 386     // of changing the splitter position!
 387     wxWindow *parent = GetParent();
 388     while ( parent && !parent->IsTopLevel() )
 389     {
 390         parent = parent->GetParent();
 391     }
 392
 393     bool iconized = FALSE;
 394     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 395     if ( frame )
 396         iconized = frame->IsIconized();
 397     else
 398     {
 399         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 400         if ( dialog )
 401             iconized = dialog->IsIconized();
 402         else
 403             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 404     }
 405
 406     if ( iconized )
 407     {
 408         event.Skip();
 409     }
 410     else
 411     {
 412         int cw, ch;
 413         GetClientSize( &cw, &ch );
 414         if ( m_windowTwo )
 415         {
 416             if ( m_splitMode == wxSPLIT_VERTICAL )
 417             {
 418                 if ( m_sashPosition >= (cw - 5) )
 419                     m_sashPosition = wxMax(10, cw - 40);
 420             }
 421             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 422             {
 423                 if ( m_sashPosition >= (ch - 5) )
 424                     m_sashPosition = wxMax(10, ch - 40);
 425             }
 426         }
 427
 428         SizeWindows();
 429     }
 430 }
 431
 432 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 433 {
 434     if ( m_windowTwo == NULL || m_sashPosition == 0)
 435         return FALSE; // No sash
 436
 437     if ( m_splitMode == wxSPLIT_VERTICAL )
 438     {
 439         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 440             return TRUE;
 441         else
 442             return FALSE;
 443     }
 444     else
 445     {
 446         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 447             return TRUE;
 448         else
 449             return FALSE;
 450     }
 451 }
 452
 453 // Draw 3D effect borders
 454 void wxSplitterWindow::DrawBorders(wxDC& dc)
 455 {
 456     int w, h;
 457     GetClientSize(&w, &h);
 458
 459     if ( GetWindowStyleFlag() & wxSP_3D )
 460     {
 461
 462         dc.SetPen(*m_facePen);
 463         dc.SetBrush(*m_faceBrush);
 464         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 465         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 466         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 467         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 468
 469         dc.SetPen(*m_mediumShadowPen);
 470         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 471         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 472
 473         dc.SetPen(*m_darkShadowPen);
 474         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 475         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 476
 477         dc.SetPen(*m_hilightPen);
 478         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 479         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.
 480                                      /// Anyway, h is required for MSW.
 481
 482         dc.SetPen(*m_lightShadowPen);
 483         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 484         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 485     }
 486     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 487     {
 488         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 489         dc.SetPen(*wxBLACK_PEN);
 490         dc.DrawRectangle(0, 0, w-1, h-1);
 491     }
 492
 493     dc.SetPen(wxNullPen);
 494     dc.SetBrush(wxNullBrush);
 495 }
 496
 497 // Draw the sash
 498 void wxSplitterWindow::DrawSash(wxDC& dc)
 499 {
 500     if ( m_sashPosition == 0 || !m_windowTwo)
 501         return;
 502
 503     int w, h;
 504     GetClientSize(&w, &h);
 505
 506     if ( GetWindowStyleFlag() & wxSP_3D )
 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         else
 531         {
 532             dc.SetPen(*m_facePen);
 533             dc.SetBrush(*m_faceBrush);
 534             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 535
 536             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 537
 538             dc.SetPen(*m_lightShadowPen);
 539             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 540
 541             dc.SetPen(*m_hilightPen);
 542             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 543
 544             dc.SetPen(*m_mediumShadowPen);
 545             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 546
 547             dc.SetPen(*m_darkShadowPen);
 548             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 549         }
 550     }
 551     else
 552     {
 553         if ( m_splitMode == wxSPLIT_VERTICAL )
 554         {
 555             dc.SetPen(*wxBLACK_PEN);
 556             dc.SetBrush(*wxBLACK_BRUSH);
 557             int h1 = h-1;
 558             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 559                 h1 += 1; // Not sure why this is necessary...
 560             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 561         }
 562         else
 563         {
 564             dc.SetPen(*wxBLACK_PEN);
 565             dc.SetBrush(*wxBLACK_BRUSH);
 566             int w1 = w-1;
 567             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 568                 w1 ++;
 569
 570             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 571         }
 572
 573     }
 574
 575     dc.SetPen(wxNullPen);
 576     dc.SetBrush(wxNullBrush);
 577 }
 578
 579 // Draw the sash tracker (for whilst moving the sash)
 580 void wxSplitterWindow::DrawSashTracker(int x, int y)
 581 {
 582     int w, h;
 583     GetClientSize(&w, &h);
 584
 585     wxScreenDC screenDC;
 586     int x1, y1;
 587     int x2, y2;
 588
 589     if ( m_splitMode == wxSPLIT_VERTICAL )
 590     {
 591         x1 = x; y1 = 2;
 592         x2 = x; y2 = h-2;
 593
 594         if ( x1 > w )
 595         {
 596             x1 = w; x2 = w;
 597         }
 598         else if ( x1 < 0 )
 599         {
 600             x1 = 0; x2 = 0;
 601         }
 602     }
 603     else
 604     {
 605         x1 = 2; y1 = y;
 606         x2 = w-2; y2 = y;
 607
 608         if ( y1 > h )
 609         {
 610             y1 = h;
 611             y2 = h;
 612         }
 613         else if ( y1 < 0 )
 614         {
 615             y1 = 0;
 616             y2 = 0;
 617         }
 618     }
 619
 620     ClientToScreen(&x1, &y1);
 621     ClientToScreen(&x2, &y2);
 622
 623     screenDC.SetLogicalFunction(wxINVERT);
 624     screenDC.SetPen(*m_sashTrackerPen);
 625     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 626
 627     screenDC.DrawLine(x1, y1, x2, y2);
 628
 629     screenDC.SetLogicalFunction(wxCOPY);
 630
 631     screenDC.SetPen(wxNullPen);
 632     screenDC.SetBrush(wxNullBrush);
 633 }
 634
 635 // Position and size subwindows.
 636 // Note that the border size applies to each subwindow, not
 637 // including the edges next to the sash.
 638 void wxSplitterWindow::SizeWindows()
 639 {
 640     int w, h;
 641     GetClientSize(&w, &h);
 642
 643     if ( m_windowOne && !m_windowTwo )
 644     {
 645         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 646
 647     }
 648     else if ( m_windowOne && m_windowTwo )
 649     {
 650         if (m_splitMode == wxSPLIT_VERTICAL)
 651         {
 652             int x1 = m_borderSize;
 653             int y1 = m_borderSize;
 654             int w1 = m_sashPosition - m_borderSize;
 655             int h1 = h - 2*m_borderSize;
 656
 657             int x2 = m_sashPosition + m_sashSize;
 658             int y2 = m_borderSize;
 659             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 660             int h2 = h - 2*m_borderSize;
 661
 662             m_windowOne->SetSize(x1, y1, w1, h1);
 663             m_windowTwo->SetSize(x2, y2, w2, h2);
 664
 665         }
 666         else
 667         {
 668             m_windowOne->SetSize(m_borderSize, m_borderSize,
 669                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 670             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 671                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 672
 673         }
 674     }
 675     wxClientDC dc(this);
 676     if ( m_borderSize > 0 )
 677         DrawBorders(dc);
 678     DrawSash(dc);
 679 }
 680
 681 // Set pane for unsplit window
 682 void wxSplitterWindow::Initialize(wxWindow *window)
 683 {
 684     m_windowOne = window;
 685     m_windowTwo = (wxWindow *) NULL;
 686     m_sashPosition = 0;
 687 }
 688
 689 // Associates the given window with window 2, drawing the appropriate sash
 690 // and changing the split mode.
 691 // Does nothing and returns FALSE if the window is already split.
 692 bool wxSplitterWindow::SplitVertically(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_VERTICAL;
 701     m_windowOne = window1;
 702     m_windowTwo = window2;
 703     if ( sashPosition > 0 )
 704         m_sashPosition = sashPosition;
 705     else if ( sashPosition < 0 )
 706         m_sashPosition = w - sashPosition;
 707     else    // default
 708         m_sashPosition = w/2;
 709
 710     SizeWindows();
 711
 712     return TRUE;
 713 }
 714
 715 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 716 {
 717     if ( IsSplit() )
 718         return FALSE;
 719
 720     int w, h;
 721     GetClientSize(&w, &h);
 722
 723     m_splitMode = wxSPLIT_HORIZONTAL;
 724     m_windowOne = window1;
 725     m_windowTwo = window2;
 726     if ( sashPosition > 0 )
 727         m_sashPosition = sashPosition;
 728     else if ( sashPosition < 0 )
 729         m_sashPosition = h - sashPosition;
 730     else    // default
 731         m_sashPosition = h/2;
 732
 733     SizeWindows();
 734
 735     return TRUE;
 736 }
 737
 738
 739 // Remove the specified (or second) window from the view
 740 // Doesn't actually delete the window.
 741 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 742 {
 743     if ( ! IsSplit() )
 744         return FALSE;
 745
 746     wxWindow *win = NULL;
 747     if ( toRemove == NULL || toRemove == m_windowTwo)
 748     {
 749         win = m_windowTwo ;
 750         m_windowTwo = (wxWindow *) NULL;
 751     }
 752     else if ( toRemove == m_windowOne )
 753     {
 754         win = m_windowOne ;
 755         m_windowOne = m_windowTwo;
 756         m_windowTwo = (wxWindow *) NULL;
 757     }
 758     else
 759     {
 760         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 761
 762         return FALSE;
 763     }
 764
 765     SendUnsplitEvent(win);
 766     m_sashPosition = 0;
 767     SizeWindows();
 768
 769     return TRUE;
 770 }
 771
 772 // Replace a window with another one
 773 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 774 {
 775     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 776     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 777
 778     if ( winOld == m_windowTwo )
 779     {
 780         m_windowTwo = winNew;
 781     }
 782     else if ( winOld == m_windowOne )
 783     {
 784         m_windowOne = winNew;
 785     }
 786     else
 787     {
 788         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 789
 790         return FALSE;
 791     }
 792
 793     SizeWindows();
 794
 795     return TRUE;
 796 }
 797
 798 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 799 {
 800     m_sashPosition = position;
 801
 802     if ( redraw )
 803     {
 804         SizeWindows();
 805     }
 806 }
 807
 808 // Initialize colours
 809 void wxSplitterWindow::InitColours()
 810 {
 811     wxDELETE( m_facePen );
 812     wxDELETE( m_faceBrush );
 813     wxDELETE( m_mediumShadowPen );
 814     wxDELETE( m_darkShadowPen );
 815     wxDELETE( m_lightShadowPen );
 816     wxDELETE( m_hilightPen );
 817
 818     // Shadow colours
 819 #if defined(__WIN95__)
 820     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 821     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 822     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 823
 824     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 825     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 826
 827     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 828     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 829
 830     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 831     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 832
 833     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 834     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 835 #else // !Win32
 836     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 837     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 838     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 839     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 840     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 841     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 842 #endif // Win32/!Win32
 843 }
 844
 845 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 846 {
 847     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 848     event.m_data.win = winRemoved;
 849
 850     (void)GetEventHandler()->ProcessEvent(event);
 851 }
 852
 853 // ---------------------------------------------------------------------------
 854 // splitter event handlers
 855 // ---------------------------------------------------------------------------
 856
 857 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 858 {
 859     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 860     const int UNSPLIT_THRESHOLD = 4;
 861
 862     int newSashPosition = event.GetSashPosition();
 863
 864     // Obtain relevant window dimension for bottom / right threshold check
 865     int w, h;
 866     GetClientSize(&w, &h);
 867     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 868
 869     bool unsplit_scenario = FALSE;
 870     if ( m_permitUnsplitAlways
 871             || m_minimumPaneSize == 0 )
 872     {
 873         // Do edge detection if unsplit premitted
 874         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 875         {
 876             // threshold top / left check
 877             newSashPosition = 0;
 878             unsplit_scenario = TRUE;
 879         }
 880         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 881         {
 882             // threshold bottom/right check
 883             newSashPosition = window_size;
 884             unsplit_scenario = TRUE;
 885         }
 886     }
 887
 888     if ( !unsplit_scenario )
 889     {
 890         // If resultant pane would be too small, enlarge it
 891         if ( newSashPosition < m_minimumPaneSize )
 892             newSashPosition = m_minimumPaneSize;
 893         if ( newSashPosition > window_size - m_minimumPaneSize )
 894             newSashPosition = window_size - m_minimumPaneSize;
 895     }
 896
 897     // If the result is out of bounds it means minimum size is too big,
 898     // so split window in half as best compromise.
 899     if ( newSashPosition < 0 || newSashPosition > window_size )
 900         newSashPosition = window_size / 2;
 901
 902     // for compatibility, call the virtual function
 903     if ( !OnSashPositionChange(newSashPosition) )
 904     {
 905         newSashPosition = -1;
 906     }
 907
 908     event.SetSashPosition(newSashPosition);
 909 }
 910
 911 // Called when the sash is double-clicked. The default behaviour is to remove
 912 // the sash if the minimum pane size is zero.
 913 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 914 {
 915     // for compatibility, call the virtual function
 916     OnDoubleClickSash(event.GetX(), event.GetY());
 917
 918     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 919     {
 920         Unsplit();
 921     }
 922 }
 923
 924 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 925 {
 926     wxWindow *win = event.GetWindowBeingRemoved();
 927
 928     // do it before calling OnUnsplit() which may delete the window
 929     win->Show(FALSE);
 930
 931     // for compatibility, call the virtual function
 932     OnUnsplit(win);
 933 }
 934
 935 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& event)
 936 {
 937     // this is currently called (and needed) under MSW only...
 938 #ifdef __WXMSW__
 939
 940     // if we don't do it, the resizing cursor might be set for child window:
 941     // and like this we explicitly say that our cursor should not be used for
 942     // children windows which overlap us
 943
 944     if ( SashHitTest(event.GetX(), event.GetY()) )
 945     {
 946         // default processing is ok
 947         event.Skip();
 948     }
 949     //else: do nothing, in particular, don't call Skip()
 950 #endif // wxMSW
 951 }