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_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
  53 wxSplitterWindow::wxSplitterWindow()
  54 {
  55     m_splitMode = wxSPLIT_VERTICAL;
  56     m_permitUnsplitAlways = FALSE;
  57     m_windowOne = (wxWindow *) NULL;
  58     m_windowTwo = (wxWindow *) NULL;
  59     m_dragMode = wxSPLIT_DRAG_NONE;
  60     m_oldX = 0;
  61     m_oldY = 0;
  62     m_firstX = 0;
  63     m_firstY = 0;
  64     m_sashSize = 7;
  65     m_borderSize = 2;
  66     m_sashPosition = 0;
  67     m_sashCursorWE = (wxCursor *) NULL;
  68     m_sashCursorNS = (wxCursor *) NULL;
  69     m_sashTrackerPen = (wxPen *) NULL;
  70     m_lightShadowPen = (wxPen *) NULL;
  71     m_mediumShadowPen = (wxPen *) NULL;
  72     m_darkShadowPen = (wxPen *) NULL;
  73     m_faceBrush = (wxBrush *) NULL;
  74     m_facePen = (wxPen *) NULL;
  75     m_hilightPen = (wxPen *) NULL;
  76     m_minimumPaneSize = 0;
  77     m_needUpdating = FALSE;
  78 }
  79
  80 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  81                                    const wxPoint& pos,
  82                                    const wxSize& size,
  83                                    long style,
  84                                    const wxString& name)
  85                 : wxWindow(parent, id, pos, size, style, name)
  86 {
  87     m_splitMode = wxSPLIT_VERTICAL;
  88     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  89     m_windowOne = (wxWindow *) NULL;
  90     m_windowTwo = (wxWindow *) NULL;
  91     m_dragMode = wxSPLIT_DRAG_NONE;
  92     m_oldX = 0;
  93     m_oldY = 0;
  94     m_firstX = 0;
  95     m_firstY = 0;
  96     m_sashSize = 7;
  97     m_borderSize = 2;
  98     m_sashPosition = 0;
  99     m_minimumPaneSize = 0;
 100     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 101     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 102     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 103     m_lightShadowPen = (wxPen *) NULL;
 104     m_mediumShadowPen = (wxPen *) NULL;
 105     m_darkShadowPen = (wxPen *) NULL;
 106     m_faceBrush = (wxBrush *) NULL;
 107     m_facePen = (wxPen *) NULL;
 108     m_hilightPen = (wxPen *) NULL;
 109
 110     if ( style & wxSP_3D )
 111     {
 112         m_borderSize = 2;
 113         m_sashSize = 7;
 114     }
 115     else if ( style & wxSP_BORDER )
 116     {
 117         m_borderSize = 1;
 118         m_sashSize = 3;
 119     }
 120     else
 121     {
 122         m_borderSize = 0;
 123         m_sashSize = 3;
 124     }
 125
 126     // Eventually, we'll respond to colour change messages
 127     InitColours();
 128
 129     // For debugging purposes, to see the background.
 130 //    SetBackground(wxBLUE_BRUSH);
 131
 132     m_needUpdating = FALSE;
 133 }
 134
 135 wxSplitterWindow::~wxSplitterWindow()
 136 {
 137     delete m_sashCursorWE;
 138     delete m_sashCursorNS;
 139     delete m_sashTrackerPen;
 140     delete m_lightShadowPen;
 141     delete m_darkShadowPen;
 142     delete m_mediumShadowPen;
 143     delete m_hilightPen;
 144     delete m_facePen;
 145     delete m_faceBrush;
 146 }
 147
 148 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 149 {
 150     wxPaintDC dc(this);
 151
 152     if ( m_borderSize > 0 )
 153         DrawBorders(dc);
 154     DrawSash(dc);
 155 }
 156
 157 void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 158 {
 159     if (m_needUpdating)
 160         SizeWindows();
 161 }
 162
 163 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 164 {
 165     wxCoord x = (wxCoord)event.GetX(),
 166             y = (wxCoord)event.GetY();
 167
 168     // reset the cursor
 169 #ifdef __WXMOTIF__
 170     SetCursor(* wxSTANDARD_CURSOR);
 171 #endif
 172 #ifdef __WXMSW__
 173     SetCursor(wxCursor());
 174 #endif
 175
 176
 177     if (event.LeftDown())
 178     {
 179         if ( SashHitTest(x, y) )
 180         {
 181             CaptureMouse();
 182
 183             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 184
 185             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 186             {
 187                 DrawSashTracker(x, y);
 188             }
 189
 190             m_oldX = x;
 191             m_oldY = y;
 192
 193             if ( m_splitMode == wxSPLIT_VERTICAL )
 194             {
 195                 SetCursor(*m_sashCursorWE);
 196             }
 197             else
 198             {
 199                 SetCursor(*m_sashCursorNS);
 200             }
 201             return;
 202         }
 203     }
 204     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 205     {
 206         // We can stop dragging now and see what we've got.
 207         m_dragMode = wxSPLIT_DRAG_NONE;
 208         ReleaseMouse();
 209
 210         // Erase old tracker
 211         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 212         {
 213             DrawSashTracker(m_oldX, m_oldY);
 214         }
 215
 216         // Obtain window size. We are only interested in the dimension the sash
 217         // splits up
 218         int w, h;
 219         GetClientSize(&w, &h);
 220         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 221         int new_sash_position =
 222             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 223
 224         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 225                                       this);
 226         eventSplitter.m_data.pos = new_sash_position;
 227         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 228         {
 229             new_sash_position = eventSplitter.GetSashPosition();
 230             if ( new_sash_position == -1 )
 231             {
 232                 // change not allowed
 233                 return;
 234             }
 235         }
 236
 237         if ( m_permitUnsplitAlways
 238                 || m_minimumPaneSize == 0 )
 239         {
 240             // Deal with possible unsplit scenarios
 241             if ( new_sash_position == 0 )
 242             {
 243                 // We remove the first window from the view
 244                 wxWindow *removedWindow = m_windowOne;
 245                 m_windowOne = m_windowTwo;
 246                 m_windowTwo = (wxWindow *) NULL;
 247                 SendUnsplitEvent(removedWindow);
 248                 m_sashPosition = 0;
 249             }
 250             else if ( new_sash_position == window_size )
 251             {
 252                 // We remove the second window from the view
 253                 wxWindow *removedWindow = m_windowTwo;
 254                 m_windowTwo = (wxWindow *) NULL;
 255                 SendUnsplitEvent(removedWindow);
 256                 m_sashPosition = 0;
 257             }
 258             else
 259             {
 260                 m_sashPosition = new_sash_position;
 261             }
 262         }
 263         else
 264         {
 265             m_sashPosition = new_sash_position;
 266         }
 267
 268         SizeWindows();
 269     }  // left up && dragging
 270     else if (event.Moving() && !event.Dragging())
 271     {
 272         // Just change the cursor if required
 273         if ( SashHitTest(x, y) )
 274         {
 275                 if ( m_splitMode == wxSPLIT_VERTICAL )
 276                 {
 277                     SetCursor(*m_sashCursorWE);
 278                 }
 279                 else
 280                 {
 281                     SetCursor(*m_sashCursorNS);
 282                 }
 283         }
 284 #ifdef __WXGTK__
 285         else
 286         {
 287             // where else do we unset the cursor?
 288             SetCursor(* wxSTANDARD_CURSOR);
 289         }
 290 #endif // __WXGTK__
 291
 292         m_needUpdating = FALSE;
 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         // Erase old tracker
 328         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 329         {
 330             DrawSashTracker(m_oldX, m_oldY);
 331         }
 332
 333         if (m_splitMode == wxSPLIT_VERTICAL)
 334             x = new_sash_position;
 335         else
 336             y = new_sash_position;
 337
 338         if (new_sash_position != -1)
 339         {
 340             // Only modify if permitted
 341             m_oldX = x;
 342             m_oldY = y;
 343         }
 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_3D )
 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
 501     int w, h;
 502     GetClientSize(&w, &h);
 503
 504     if ( GetWindowStyleFlag() & wxSP_3D )
 505     {
 506         if ( m_splitMode == wxSPLIT_VERTICAL )
 507         {
 508             dc.SetPen(*m_facePen);
 509             dc.SetBrush(*m_faceBrush);
 510             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 511
 512             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 513
 514             dc.SetPen(*m_lightShadowPen);
 515                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 516             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 517
 518             dc.SetPen(*m_hilightPen);
 519             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 520
 521             dc.SetPen(*m_mediumShadowPen);
 522                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 523             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 524
 525             dc.SetPen(*m_darkShadowPen);
 526             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 527         }
 528         else
 529         {
 530             dc.SetPen(*m_facePen);
 531             dc.SetBrush(*m_faceBrush);
 532             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 533
 534             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 535
 536             dc.SetPen(*m_lightShadowPen);
 537             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 538
 539             dc.SetPen(*m_hilightPen);
 540             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 541
 542             dc.SetPen(*m_mediumShadowPen);
 543             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 544
 545             dc.SetPen(*m_darkShadowPen);
 546             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 547         }
 548     }
 549     else
 550     {
 551         if ( m_splitMode == wxSPLIT_VERTICAL )
 552         {
 553             dc.SetPen(*wxBLACK_PEN);
 554             dc.SetBrush(*wxBLACK_BRUSH);
 555             int h1 = h-1;
 556             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 557                 h1 += 1; // Not sure why this is necessary...
 558             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 559         }
 560         else
 561         {
 562             dc.SetPen(*wxBLACK_PEN);
 563             dc.SetBrush(*wxBLACK_BRUSH);
 564             int w1 = w-1;
 565             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 566                 w1 ++;
 567
 568             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 569         }
 570
 571     }
 572
 573     dc.SetPen(wxNullPen);
 574     dc.SetBrush(wxNullBrush);
 575 }
 576
 577 // Draw the sash tracker (for whilst moving the sash)
 578 void wxSplitterWindow::DrawSashTracker(int x, int y)
 579 {
 580     int w, h;
 581     GetClientSize(&w, &h);
 582
 583     wxScreenDC screenDC;
 584     int x1, y1;
 585     int x2, y2;
 586
 587     if ( m_splitMode == wxSPLIT_VERTICAL )
 588     {
 589         x1 = x; y1 = 2;
 590         x2 = x; y2 = h-2;
 591
 592         if ( x1 > w )
 593         {
 594             x1 = w; x2 = w;
 595         }
 596         else if ( x1 < 0 )
 597         {
 598             x1 = 0; x2 = 0;
 599         }
 600     }
 601     else
 602     {
 603         x1 = 2; y1 = y;
 604         x2 = w-2; y2 = y;
 605
 606         if ( y1 > h )
 607         {
 608             y1 = h;
 609             y2 = h;
 610         }
 611         else if ( y1 < 0 )
 612         {
 613             y1 = 0;
 614             y2 = 0;
 615         }
 616     }
 617
 618     ClientToScreen(&x1, &y1);
 619     ClientToScreen(&x2, &y2);
 620
 621     screenDC.SetLogicalFunction(wxINVERT);
 622     screenDC.SetPen(*m_sashTrackerPen);
 623     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 624
 625     screenDC.DrawLine(x1, y1, x2, y2);
 626
 627     screenDC.SetLogicalFunction(wxCOPY);
 628
 629     screenDC.SetPen(wxNullPen);
 630     screenDC.SetBrush(wxNullBrush);
 631 }
 632
 633 // Position and size subwindows.
 634 // Note that the border size applies to each subwindow, not
 635 // including the edges next to the sash.
 636 void wxSplitterWindow::SizeWindows()
 637 {
 638     int w, h;
 639     GetClientSize(&w, &h);
 640
 641     if ( m_windowOne && !m_windowTwo )
 642     {
 643         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 644
 645     }
 646     else if ( m_windowOne && m_windowTwo )
 647     {
 648         if (m_splitMode == wxSPLIT_VERTICAL)
 649         {
 650             int x1 = m_borderSize;
 651             int y1 = m_borderSize;
 652             int w1 = m_sashPosition - m_borderSize;
 653             int h1 = h - 2*m_borderSize;
 654
 655             int x2 = m_sashPosition + m_sashSize;
 656             int y2 = m_borderSize;
 657             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 658             int h2 = h - 2*m_borderSize;
 659
 660             m_windowOne->SetSize(x1, y1, w1, h1);
 661             m_windowTwo->SetSize(x2, y2, w2, h2);
 662
 663         }
 664         else
 665         {
 666             m_windowOne->SetSize(m_borderSize, m_borderSize,
 667                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 668             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 669                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 670
 671         }
 672     }
 673     wxClientDC dc(this);
 674     if ( m_borderSize > 0 )
 675         DrawBorders(dc);
 676     DrawSash(dc);
 677 }
 678
 679 // Set pane for unsplit window
 680 void wxSplitterWindow::Initialize(wxWindow *window)
 681 {
 682     m_windowOne = window;
 683     m_windowTwo = (wxWindow *) NULL;
 684     m_sashPosition = 0;
 685 }
 686
 687 // Associates the given window with window 2, drawing the appropriate sash
 688 // and changing the split mode.
 689 // Does nothing and returns FALSE if the window is already split.
 690 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 691 {
 692     if ( IsSplit() )
 693         return FALSE;
 694
 695     int w, h;
 696     GetClientSize(&w, &h);
 697
 698     m_splitMode = wxSPLIT_VERTICAL;
 699     m_windowOne = window1;
 700     m_windowTwo = window2;
 701     if ( sashPosition > 0 )
 702         m_sashPosition = sashPosition;
 703     else if ( sashPosition < 0 )
 704         m_sashPosition = w - sashPosition;
 705     else    // default
 706         m_sashPosition = w/2;
 707
 708     SizeWindows();
 709
 710     return TRUE;
 711 }
 712
 713 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 714 {
 715     if ( IsSplit() )
 716         return FALSE;
 717
 718     int w, h;
 719     GetClientSize(&w, &h);
 720
 721     m_splitMode = wxSPLIT_HORIZONTAL;
 722     m_windowOne = window1;
 723     m_windowTwo = window2;
 724     if ( sashPosition > 0 )
 725         m_sashPosition = sashPosition;
 726     else if ( sashPosition < 0 )
 727         m_sashPosition = h - sashPosition;
 728     else    // default
 729         m_sashPosition = h/2;
 730
 731     SizeWindows();
 732
 733     return TRUE;
 734 }
 735
 736
 737 // Remove the specified (or second) window from the view
 738 // Doesn't actually delete the window.
 739 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 740 {
 741     if ( ! IsSplit() )
 742         return FALSE;
 743
 744     wxWindow *win = NULL;
 745     if ( toRemove == NULL || toRemove == m_windowTwo)
 746     {
 747         win = m_windowTwo ;
 748         m_windowTwo = (wxWindow *) NULL;
 749     }
 750     else if ( toRemove == m_windowOne )
 751     {
 752         win = m_windowOne ;
 753         m_windowOne = m_windowTwo;
 754         m_windowTwo = (wxWindow *) NULL;
 755     }
 756     else
 757     {
 758         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 759
 760         return FALSE;
 761     }
 762
 763     SendUnsplitEvent(win);
 764     m_sashPosition = 0;
 765     SizeWindows();
 766
 767     return TRUE;
 768 }
 769
 770 // Replace a window with another one
 771 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 772 {
 773     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 774     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 775
 776     if ( winOld == m_windowTwo )
 777     {
 778         m_windowTwo = winNew;
 779     }
 780     else if ( winOld == m_windowOne )
 781     {
 782         m_windowOne = winNew;
 783     }
 784     else
 785     {
 786         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 787
 788         return FALSE;
 789     }
 790
 791     SizeWindows();
 792
 793     return TRUE;
 794 }
 795
 796 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 797 {
 798     m_sashPosition = position;
 799
 800     if ( redraw )
 801     {
 802         SizeWindows();
 803     }
 804 }
 805
 806 // Initialize colours
 807 void wxSplitterWindow::InitColours()
 808 {
 809     wxDELETE( m_facePen );
 810     wxDELETE( m_faceBrush );
 811     wxDELETE( m_mediumShadowPen );
 812     wxDELETE( m_darkShadowPen );
 813     wxDELETE( m_lightShadowPen );
 814     wxDELETE( m_hilightPen );
 815
 816     // Shadow colours
 817 #if defined(__WIN95__)
 818     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 819     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 820     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 821
 822     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 823     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 824
 825     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 826     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 827
 828     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 829     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 830
 831     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 832     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 833 #else // !Win32
 834     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 835     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 836     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 837     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 838     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 839     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 840 #endif // Win32/!Win32
 841 }
 842
 843 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 844 {
 845     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 846     event.m_data.win = winRemoved;
 847
 848     (void)GetEventHandler()->ProcessEvent(event);
 849 }
 850
 851 // ---------------------------------------------------------------------------
 852 // splitter event handlers
 853 // ---------------------------------------------------------------------------
 854
 855 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 856 {
 857     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 858     const int UNSPLIT_THRESHOLD = 4;
 859
 860     int newSashPosition = event.GetSashPosition();
 861
 862     // Obtain relevant window dimension for bottom / right threshold check
 863     int w, h;
 864     GetClientSize(&w, &h);
 865     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 866
 867     bool unsplit_scenario = FALSE;
 868     if ( m_permitUnsplitAlways
 869             || m_minimumPaneSize == 0 )
 870     {
 871         // Do edge detection if unsplit premitted
 872         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 873         {
 874             // threshold top / left check
 875             newSashPosition = 0;
 876             unsplit_scenario = TRUE;
 877         }
 878         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 879         {
 880             // threshold bottom/right check
 881             newSashPosition = window_size;
 882             unsplit_scenario = TRUE;
 883         }
 884     }
 885
 886     if ( !unsplit_scenario )
 887     {
 888         // If resultant pane would be too small, enlarge it
 889         if ( newSashPosition < m_minimumPaneSize )
 890             newSashPosition = m_minimumPaneSize;
 891         if ( newSashPosition > window_size - m_minimumPaneSize )
 892             newSashPosition = window_size - m_minimumPaneSize;
 893     }
 894
 895     // If the result is out of bounds it means minimum size is too big,
 896     // so split window in half as best compromise.
 897     if ( newSashPosition < 0 || newSashPosition > window_size )
 898         newSashPosition = window_size / 2;
 899
 900     // for compatibility, call the virtual function
 901     if ( !OnSashPositionChange(newSashPosition) )
 902     {
 903         newSashPosition = -1;
 904     }
 905
 906     event.SetSashPosition(newSashPosition);
 907 }
 908
 909 // Called when the sash is double-clicked. The default behaviour is to remove
 910 // the sash if the minimum pane size is zero.
 911 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 912 {
 913     // for compatibility, call the virtual function
 914     OnDoubleClickSash(event.GetX(), event.GetY());
 915
 916     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 917     {
 918         Unsplit();
 919     }
 920 }
 921
 922 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 923 {
 924     wxWindow *win = event.GetWindowBeingRemoved();
 925
 926     // do it before calling OnUnsplit() which may delete the window
 927     win->Show(FALSE);
 928
 929     // for compatibility, call the virtual function
 930     OnUnsplit(win);
 931 }