src/generic/splitter.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/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
   9 // Licence:     wxWindows licence
  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 #if wxUSE_SPLITTER
  20 #ifdef __BORLANDC__
  21     #pragma hdrstop
  22 #endif
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/string.h"
  26     #include "wx/utils.h"
  27     #include "wx/log.h"
  28
  29     #include "wx/dcscreen.h"
  30
  31     #include "wx/window.h"
  32     #include "wx/dialog.h"
  33     #include "wx/frame.h"
  34
  35     #include "wx/settings.h"
  36 #endif
  37
  38 #include "wx/splitter.h"
  39
  40 #include <stdlib.h>
  41
  42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING)
  44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED)
  45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_UNSPLIT)
  46
  47 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  48 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxNotifyEvent)
  49
  50 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  51     EVT_PAINT(wxSplitterWindow::OnPaint)
  52     EVT_SIZE(wxSplitterWindow::OnSize)
  53     EVT_IDLE(wxSplitterWindow::OnIdle)
  54     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  55
  56 #if defined( __WXMSW__ ) || defined( __WXMAC__)
  57     EVT_SET_CURSOR(wxSplitterWindow::OnSetCursor)
  58 #endif // wxMSW
  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 #ifdef __WXMAC__
  92     int major,minor;
  93     wxGetOsVersion( &major, &minor );
  94     if (major >= 10)
  95         m_windowStyle |= wxSP_SASH_AQUA;
  96 #endif
  97
  98     return TRUE;
  99 }
 100
 101 void wxSplitterWindow::Init()
 102 {
 103     m_container.SetContainerWindow(this);
 104
 105     m_splitMode = wxSPLIT_VERTICAL;
 106     m_permitUnsplitAlways = TRUE;
 107     m_windowOne = (wxWindow *) NULL;
 108     m_windowTwo = (wxWindow *) NULL;
 109     m_dragMode = wxSPLIT_DRAG_NONE;
 110     m_oldX = 0;
 111     m_oldY = 0;
 112     m_firstX = 0;
 113     m_firstY = 0;
 114     m_sashSize = 3;
 115     m_borderSize = 0;
 116     m_sashPosition = m_requestedSashPosition = 0;
 117     m_minimumPaneSize = 0;
 118     m_sashCursorWE = wxCursor(wxCURSOR_SIZEWE);
 119     m_sashCursorNS = wxCursor(wxCURSOR_SIZENS);
 120     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 121     m_lightShadowPen = (wxPen *) NULL;
 122     m_mediumShadowPen = (wxPen *) NULL;
 123     m_darkShadowPen = (wxPen *) NULL;
 124     m_faceBrush = (wxBrush *) NULL;
 125     m_facePen = (wxPen *) NULL;
 126     m_hilightPen = (wxPen *) NULL;
 127
 128     InitColours();
 129
 130     m_needUpdating = FALSE;
 131 }
 132
 133 wxSplitterWindow::~wxSplitterWindow()
 134 {
 135     delete m_sashTrackerPen;
 136     delete m_lightShadowPen;
 137     delete m_darkShadowPen;
 138     delete m_mediumShadowPen;
 139     delete m_hilightPen;
 140     delete m_facePen;
 141     delete m_faceBrush;
 142 }
 143
 144 void wxSplitterWindow::SetResizeCursor()
 145 {
 146     SetCursor(m_splitMode == wxSPLIT_VERTICAL ? m_sashCursorWE
 147                                               : m_sashCursorNS);
 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& event)
 160 {
 161     if (m_needUpdating)
 162         SizeWindows();
 163
 164     event.Skip();
 165 }
 166
 167 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 168 {
 169     int x = (int)event.GetX(),
 170         y = (int)event.GetY();
 171
 172 #if defined(__WXMSW__)
 173     // SetCursor(wxCursor());   // Is this required?
 174 #endif
 175
 176     if (GetWindowStyle() & wxSP_NOSASH)
 177         return;
 178
 179     // with wxSP_LIVE_UPDATE style the splitter windows are always resized
 180     // following the mouse movement while it drags the sash, without it we only
 181     // draw the sash at the new position but only resize the windows when the
 182     // dragging is finished
 183     bool isLive = (GetWindowStyleFlag() & wxSP_LIVE_UPDATE) != 0;
 184
 185     if (event.LeftDown())
 186     {
 187         if ( SashHitTest(x, y) )
 188         {
 189             // Start the drag now
 190             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 191
 192             // Capture mouse and set the cursor
 193             CaptureMouse();
 194             SetResizeCursor();
 195
 196             if ( !isLive )
 197             {
 198                 // remember the initial sash position and draw the initial
 199                 // shadow sash
 200                 m_sashPositionCurrent = m_sashPosition;
 201
 202                 DrawSashTracker(x, y);
 203             }
 204
 205             m_oldX = x;
 206             m_oldY = y;
 207
 208             SetResizeCursor();
 209             return;
 210         }
 211     }
 212     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 213     {
 214         // We can stop dragging now and see what we've got.
 215         m_dragMode = wxSPLIT_DRAG_NONE;
 216
 217         // Release mouse and unset the cursor
 218         ReleaseMouse();
 219         SetCursor(* wxSTANDARD_CURSOR);
 220
 221         // exit if unsplit after doubleclick
 222         if ( !IsSplit() )
 223         {
 224             return;
 225         }
 226
 227         // Erase old tracker
 228         if ( !isLive )
 229         {
 230             DrawSashTracker(m_oldX, m_oldY);
 231         }
 232
 233         // the position of the click doesn't exactly correspond to
 234         // m_sashPosition, rather it changes it by the distance by which the
 235         // mouse has moved
 236         int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
 237
 238         int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
 239         int posSashNew = OnSashPositionChanging(posSashOld + diff);
 240         if ( posSashNew == -1 )
 241         {
 242             // change not allowed
 243             return;
 244         }
 245
 246         if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 247         {
 248             // Deal with possible unsplit scenarios
 249             if ( posSashNew == 0 )
 250             {
 251                 // We remove the first window from the view
 252                 wxWindow *removedWindow = m_windowOne;
 253                 m_windowOne = m_windowTwo;
 254                 m_windowTwo = (wxWindow *) NULL;
 255                 OnUnsplit(removedWindow);
 256                 SetSashPositionAndNotify(0);
 257             }
 258             else if ( posSashNew == GetWindowSize() )
 259             {
 260                 // We remove the second window from the view
 261                 wxWindow *removedWindow = m_windowTwo;
 262                 m_windowTwo = (wxWindow *) NULL;
 263                 OnUnsplit(removedWindow);
 264                 SetSashPositionAndNotify(0);
 265             }
 266             else
 267             {
 268                 SetSashPositionAndNotify(posSashNew);
 269             }
 270         }
 271         else
 272         {
 273             SetSashPositionAndNotify(posSashNew);
 274         }
 275
 276         SizeWindows();
 277     }  // left up && dragging
 278     else if (event.Moving() && !event.Dragging())
 279     {
 280         // Just change the cursor as required
 281         if ( SashHitTest(x, y) )
 282             SetResizeCursor();
 283         else
 284             SetCursor(* wxSTANDARD_CURSOR);
 285     }
 286     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 287     {
 288         int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
 289         if ( !diff )
 290         {
 291             // nothing to do, mouse didn't really move far enough
 292             return;
 293         }
 294
 295         int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
 296         int posSashNew = OnSashPositionChanging(posSashOld + diff);
 297         if ( posSashNew == -1 )
 298         {
 299             // change not allowed
 300             return;
 301         }
 302
 303         if ( posSashNew == m_sashPosition )
 304             return;
 305
 306         // Erase old tracker
 307         if ( !isLive )
 308         {
 309             DrawSashTracker(m_oldX, m_oldY);
 310         }
 311
 312         if (m_splitMode == wxSPLIT_VERTICAL)
 313             x = posSashNew;
 314         else
 315             y = posSashNew;
 316
 317         // Remember old positions
 318         m_oldX = x;
 319         m_oldY = y;
 320
 321 #ifdef __WXMSW__
 322         // As we captured the mouse, we may get the mouse events from outside
 323         // our window - for example, negative values in x, y. This has a weird
 324         // consequence under MSW where we use unsigned values sometimes and
 325         // signed ones other times: the coordinates turn as big positive
 326         // numbers and so the sash is drawn on the *right* side of the window
 327         // instead of the left (or bottom instead of top). Correct this.
 328         if ( (short)m_oldX < 0 )
 329             m_oldX = 0;
 330         if ( (short)m_oldY < 0 )
 331             m_oldY = 0;
 332 #endif // __WXMSW__
 333
 334         // Draw new one
 335         if ( !isLive )
 336         {
 337             m_sashPositionCurrent = posSashNew;
 338
 339             DrawSashTracker(m_oldX, m_oldY);
 340         }
 341         else
 342         {
 343             SetSashPositionAndNotify(posSashNew);
 344             m_needUpdating = TRUE;
 345         }
 346     }
 347     else if ( event.LeftDClick() && m_windowTwo )
 348     {
 349         OnDoubleClickSash(x, y);
 350     }
 351 }
 352
 353 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 354 {
 355     // only process this message if we're not iconized - otherwise iconizing
 356     // and restoring a window containing the splitter has a funny side effect
 357     // of changing the splitter position!
 358     wxWindow *parent = GetParent();
 359     while ( parent && !parent->IsTopLevel() )
 360     {
 361         parent = parent->GetParent();
 362     }
 363
 364     bool iconized = FALSE;
 365
 366     // wxMotif doesn't yet have a wxTopLevelWindow implementation
 367 #ifdef __WXMOTIF__
 368     wxFrame *winTop = wxDynamicCast(parent, wxFrame);
 369 #else
 370     wxTopLevelWindow *winTop = wxDynamicCast(parent, wxTopLevelWindow);
 371 #endif
 372     if ( winTop )
 373     {
 374         iconized = winTop->IsIconized();
 375     }
 376 #ifndef __WXMOTIF__
 377     else
 378     {
 379         wxFAIL_MSG(wxT("should have a top level parent!"));
 380
 381         iconized = FALSE;
 382     }
 383 #endif
 384
 385     if ( iconized )
 386     {
 387         event.Skip();
 388
 389         return;
 390     }
 391
 392     int cw, ch;
 393     GetClientSize( &cw, &ch );
 394     if ( m_windowTwo )
 395     {
 396         if ( m_splitMode == wxSPLIT_VERTICAL )
 397         {
 398             if ( m_sashPosition >= (cw - 5) )
 399                 SetSashPositionAndNotify(wxMax(10, cw - 40));
 400         }
 401         else // m_splitMode == wxSPLIT_HORIZONTAL
 402         {
 403             if ( m_sashPosition >= (ch - 5) )
 404                 SetSashPositionAndNotify(wxMax(10, ch - 40));
 405         }
 406     }
 407
 408     SizeWindows();
 409 }
 410
 411 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 412 {
 413     if ( m_windowTwo == NULL || m_sashPosition == 0)
 414         return FALSE; // No sash
 415
 416     if ( m_splitMode == wxSPLIT_VERTICAL )
 417     {
 418         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 419             return TRUE;
 420         else
 421             return FALSE;
 422     }
 423     else
 424     {
 425         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 426             return TRUE;
 427         else
 428             return FALSE;
 429     }
 430 }
 431
 432 // Draw 3D effect borders
 433 void wxSplitterWindow::DrawBorders(wxDC& dc)
 434 {
 435     int w, h;
 436     GetClientSize(&w, &h);
 437
 438     if ( GetWindowStyleFlag() & wxSP_3DBORDER )
 439     {
 440
 441         dc.SetPen(*m_facePen);
 442         dc.SetBrush(*m_faceBrush);
 443         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 444         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 445         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 446         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 447
 448         dc.SetPen(*m_mediumShadowPen);
 449         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 450         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 451
 452         dc.SetPen(*m_darkShadowPen);
 453         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 454         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 455
 456         dc.SetPen(*m_hilightPen);
 457         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 458         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.
 459                                      /// Anyway, h is required for MSW.
 460
 461         dc.SetPen(*m_lightShadowPen);
 462         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 463         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 464     }
 465     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 466     {
 467         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 468         dc.SetPen(*wxBLACK_PEN);
 469         dc.DrawRectangle(0, 0, w-1, h-1);
 470     }
 471
 472     dc.SetPen(wxNullPen);
 473     dc.SetBrush(wxNullBrush);
 474 }
 475
 476 // Draw the sash
 477 void wxSplitterWindow::DrawSash(wxDC& dc)
 478 {
 479     if ( m_sashPosition == 0 || !m_windowTwo)
 480         return;
 481     if (GetWindowStyle() & wxSP_NOSASH)
 482         return;
 483
 484     int w, h;
 485     GetClientSize(&w, &h);
 486
 487     if ( GetWindowStyleFlag() & wxSP_3DSASH )
 488     {
 489         if ( m_splitMode == wxSPLIT_VERTICAL )
 490         {
 491             dc.SetPen(*m_facePen);
 492
 493             if (HasFlag( wxSP_SASH_AQUA ))
 494                 dc.SetBrush(*wxWHITE_BRUSH);
 495             else
 496                 dc.SetBrush(*m_faceBrush);
 497             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 498
 499             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 500
 501             dc.SetPen(*m_lightShadowPen);
 502             int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 503             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 504
 505             dc.SetPen(*m_hilightPen);
 506             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 507
 508             if (!HasFlag( wxSP_SASH_AQUA ))
 509                 dc.SetPen(*m_mediumShadowPen);
 510
 511             int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 512             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 513
 514             if (HasFlag( wxSP_SASH_AQUA ))
 515                 dc.SetPen(*m_lightShadowPen);
 516             else
 517                 dc.SetPen(*m_darkShadowPen);
 518             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 519
 520             // Draw the top and bottom edges of the sash, if requested
 521             if (GetWindowStyle() & wxSP_FULLSASH)
 522             {
 523                 // Top
 524                 dc.SetPen(*m_hilightPen);
 525                 dc.DrawLine(m_sashPosition+1, m_borderSize, m_sashPosition+m_sashSize-1, m_borderSize);
 526
 527                 // Bottom
 528                 dc.SetPen(*m_darkShadowPen);
 529                 dc.DrawLine(m_sashPosition+1, h-m_borderSize-1, m_sashPosition+m_sashSize-1, h-m_borderSize-1);
 530             }
 531         }
 532         else // wxSPLIT_HORIZONTAL
 533         {
 534             dc.SetPen(*m_facePen);
 535             if (HasFlag( wxSP_SASH_AQUA ))
 536                 dc.SetBrush(*wxWHITE_BRUSH);
 537             else
 538                 dc.SetBrush(*m_faceBrush);
 539             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 540
 541             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 542
 543             dc.SetPen(*m_lightShadowPen);
 544             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 545
 546             dc.SetPen(*m_hilightPen);
 547             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 548
 549             if (!HasFlag( wxSP_SASH_AQUA ))
 550                 dc.SetPen(*m_mediumShadowPen);
 551             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 552
 553             if (HasFlag( wxSP_SASH_AQUA ))
 554                 dc.SetPen(*m_lightShadowPen);
 555             else
 556                 dc.SetPen(*m_darkShadowPen);
 557             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 558
 559             // Draw the left and right edges of the sash, if requested
 560             if (GetWindowStyle() & wxSP_FULLSASH)
 561             {
 562                 // Left
 563                 dc.SetPen(*m_hilightPen);
 564                 dc.DrawLine(m_borderSize, m_sashPosition, m_borderSize, m_sashPosition+m_sashSize);
 565
 566                 // Right
 567                 dc.SetPen(*m_darkShadowPen);
 568                 dc.DrawLine(w-m_borderSize-1, m_sashPosition+1, w-m_borderSize-1, m_sashPosition+m_sashSize-1);
 569             }
 570         }
 571     }
 572     else // !wxSP_3DSASH
 573     {
 574         dc.SetPen(*wxTRANSPARENT_PEN);
 575         dc.SetBrush(*m_faceBrush);
 576         if ( m_splitMode == wxSPLIT_VERTICAL )
 577         {
 578             int h1 = h-1;
 579             int y1 = 0;
 580             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 581                 h1 += 1; // Not sure why this is necessary...
 582             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 583             {
 584                 y1 = 2; h1 -= 3;
 585             }
 586             dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 587         }
 588         else // wxSPLIT_HORIZONTAL
 589         {
 590             int w1 = w-1;
 591             int x1 = 0;
 592             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 593                 w1 ++;
 594             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 595             {
 596                 x1 = 2; w1 -= 3;
 597             }
 598             dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 599         }
 600     }
 601
 602     dc.SetPen(wxNullPen);
 603     dc.SetBrush(wxNullBrush);
 604 }
 605
 606 // Draw the sash tracker (for whilst moving the sash)
 607 void wxSplitterWindow::DrawSashTracker(int x, int y)
 608 {
 609     int w, h;
 610     GetClientSize(&w, &h);
 611
 612     wxScreenDC screenDC;
 613     int x1, y1;
 614     int x2, y2;
 615
 616     if ( m_splitMode == wxSPLIT_VERTICAL )
 617     {
 618         x1 = x; y1 = 2;
 619         x2 = x; y2 = h-2;
 620
 621         if ( x1 > w )
 622         {
 623             x1 = w; x2 = w;
 624         }
 625         else if ( x1 < 0 )
 626         {
 627             x1 = 0; x2 = 0;
 628         }
 629     }
 630     else
 631     {
 632         x1 = 2; y1 = y;
 633         x2 = w-2; y2 = y;
 634
 635         if ( y1 > h )
 636         {
 637             y1 = h;
 638             y2 = h;
 639         }
 640         else if ( y1 < 0 )
 641         {
 642             y1 = 0;
 643             y2 = 0;
 644         }
 645     }
 646
 647     ClientToScreen(&x1, &y1);
 648     ClientToScreen(&x2, &y2);
 649
 650     screenDC.SetLogicalFunction(wxINVERT);
 651     screenDC.SetPen(*m_sashTrackerPen);
 652     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 653
 654     screenDC.DrawLine(x1, y1, x2, y2);
 655
 656     screenDC.SetLogicalFunction(wxCOPY);
 657
 658     screenDC.SetPen(wxNullPen);
 659     screenDC.SetBrush(wxNullBrush);
 660 }
 661
 662 int wxSplitterWindow::GetWindowSize() const
 663 {
 664     wxSize size = GetClientSize();
 665
 666     return m_splitMode == wxSPLIT_VERTICAL ? size.x : size.y;
 667 }
 668
 669 int wxSplitterWindow::AdjustSashPosition(int sashPos) const
 670 {
 671     int window_size = GetWindowSize();
 672
 673     wxWindow *win;
 674
 675     win = GetWindow1();
 676     if ( win )
 677     {
 678         // the window shouldn't be smaller than its own minimal size nor
 679         // smaller than the minimual pane size specified for this splitter
 680         int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
 681                                                       : win->GetMinHeight();
 682
 683         if ( minSize == -1 || m_minimumPaneSize > minSize )
 684             minSize = m_minimumPaneSize;
 685
 686         minSize += GetBorderSize();
 687
 688         if ( sashPos < minSize )
 689             sashPos = minSize;
 690     }
 691
 692     win = GetWindow2();
 693     if ( win )
 694     {
 695         int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
 696                                                       : win->GetMinHeight();
 697
 698         if ( minSize == -1 || m_minimumPaneSize > minSize )
 699             minSize = m_minimumPaneSize;
 700
 701         int maxSize = window_size - minSize - GetBorderSize();
 702         if ( sashPos > maxSize )
 703             sashPos = maxSize;
 704     }
 705
 706     return sashPos;
 707 }
 708
 709 bool wxSplitterWindow::DoSetSashPosition(int sashPos)
 710 {
 711     int newSashPosition = AdjustSashPosition(sashPos);
 712
 713     if ( newSashPosition == m_sashPosition )
 714         return FALSE;
 715
 716     m_sashPosition = newSashPosition;
 717
 718     return TRUE;
 719 }
 720
 721 void wxSplitterWindow::SetSashPositionAndNotify(int sashPos)
 722 {
 723     if ( DoSetSashPosition(sashPos) )
 724     {
 725         wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED, this);
 726         event.m_data.pos = m_sashPosition;
 727
 728         (void)DoSendEvent(event);
 729     }
 730 }
 731
 732 // Position and size subwindows.
 733 // Note that the border size applies to each subwindow, not
 734 // including the edges next to the sash.
 735 void wxSplitterWindow::SizeWindows()
 736 {
 737     // check if we have delayed setting the real sash position
 738     if ( m_requestedSashPosition != INT_MAX )
 739     {
 740         int newSashPosition = ConvertSashPosition(m_requestedSashPosition);
 741         if ( newSashPosition != m_sashPosition )
 742         {
 743             DoSetSashPosition(newSashPosition);
 744         }
 745
 746         if ( newSashPosition <= m_sashPosition
 747             && newSashPosition >= m_sashPosition - GetBorderSize() )
 748         {
 749             // don't update it any more
 750             m_requestedSashPosition = INT_MAX;
 751         }
 752     }
 753
 754     int w, h;
 755     GetClientSize(&w, &h);
 756
 757     if ( GetWindow1() && !GetWindow2() )
 758     {
 759         GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 760                               w - 2*GetBorderSize(), h - 2*GetBorderSize());
 761     }
 762     else if ( GetWindow1() && GetWindow2() )
 763     {
 764         if (GetSplitMode() == wxSPLIT_VERTICAL)
 765         {
 766             int x1 = GetBorderSize();
 767             int y1 = GetBorderSize();
 768             int w1 = GetSashPosition() - GetBorderSize();
 769             int h1 = h - 2*GetBorderSize();
 770
 771             int x2 = GetSashPosition() + GetSashSize();
 772             int y2 = GetBorderSize();
 773             int w2 = w - 2*GetBorderSize() - GetSashSize() - w1;
 774             int h2 = h - 2*GetBorderSize();
 775
 776             GetWindow1()->SetSize(x1, y1, w1, h1);
 777             GetWindow2()->SetSize(x2, y2, w2, h2);
 778         }
 779         else
 780         {
 781             GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 782                 w - 2*GetBorderSize(), GetSashPosition() - GetBorderSize());
 783             GetWindow2()->SetSize(GetBorderSize(), GetSashPosition() + GetSashSize(),
 784                 w - 2*GetBorderSize(), h - 2*GetBorderSize() - GetSashSize() - (GetSashPosition() - GetBorderSize()));
 785         }
 786     }
 787     wxClientDC dc(this);
 788     if ( GetBorderSize() > 0 )
 789         DrawBorders(dc);
 790     DrawSash(dc);
 791
 792     SetNeedUpdating(FALSE);
 793 }
 794
 795 // Set pane for unsplit window
 796 void wxSplitterWindow::Initialize(wxWindow *window)
 797 {
 798     wxASSERT_MSG( window && window->GetParent() == this,
 799                   _T("windows in the splitter should have it as parent!") );
 800
 801     m_windowOne = window;
 802     m_windowTwo = (wxWindow *) NULL;
 803     DoSetSashPosition(0);
 804 }
 805
 806 // Associates the given window with window 2, drawing the appropriate sash
 807 // and changing the split mode.
 808 // Does nothing and returns FALSE if the window is already split.
 809 bool wxSplitterWindow::DoSplit(wxSplitMode mode,
 810                                wxWindow *window1, wxWindow *window2,
 811                                int sashPosition)
 812 {
 813     if ( IsSplit() )
 814         return FALSE;
 815
 816     wxCHECK_MSG( window1 && window2, FALSE,
 817                  _T("can not split with NULL window(s)") );
 818
 819     wxCHECK_MSG( window1->GetParent() == this && window2->GetParent() == this, FALSE,
 820                   _T("windows in the splitter should have it as parent!") );
 821
 822     m_splitMode = mode;
 823     m_windowOne = window1;
 824     m_windowTwo = window2;
 825
 826     // remember the sash position we want to set for later if we can't set it
 827     // right now (e.g. because the window is too small)
 828     m_requestedSashPosition = sashPosition;
 829
 830     DoSetSashPosition(ConvertSashPosition(sashPosition));
 831
 832     SizeWindows();
 833
 834     return TRUE;
 835 }
 836
 837 int wxSplitterWindow::ConvertSashPosition(int sashPosition) const
 838 {
 839     if ( sashPosition > 0 )
 840     {
 841         return sashPosition;
 842     }
 843     else if ( sashPosition < 0 )
 844     {
 845         // It's negative so adding is subtracting
 846         return GetWindowSize() + sashPosition;
 847     }
 848     else // sashPosition == 0
 849     {
 850         // default, put it in the centre
 851         return GetWindowSize() / 2;
 852     }
 853 }
 854
 855 // Remove the specified (or second) window from the view
 856 // Doesn't actually delete the window.
 857 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 858 {
 859     if ( ! IsSplit() )
 860         return FALSE;
 861
 862     wxWindow *win = NULL;
 863     if ( toRemove == NULL || toRemove == m_windowTwo)
 864     {
 865         win = m_windowTwo ;
 866         m_windowTwo = (wxWindow *) NULL;
 867     }
 868     else if ( toRemove == m_windowOne )
 869     {
 870         win = m_windowOne ;
 871         m_windowOne = m_windowTwo;
 872         m_windowTwo = (wxWindow *) NULL;
 873     }
 874     else
 875     {
 876         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 877
 878         return FALSE;
 879     }
 880
 881     win->Show(FALSE);
 882     DoSetSashPosition(0);
 883     SizeWindows();
 884
 885     return TRUE;
 886 }
 887
 888 // Replace a window with another one
 889 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 890 {
 891     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 892     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 893
 894     if ( winOld == m_windowTwo )
 895     {
 896         m_windowTwo = winNew;
 897     }
 898     else if ( winOld == m_windowOne )
 899     {
 900         m_windowOne = winNew;
 901     }
 902     else
 903     {
 904         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 905
 906         return FALSE;
 907     }
 908
 909     SizeWindows();
 910
 911     return TRUE;
 912 }
 913
 914 void wxSplitterWindow::SetMinimumPaneSize(int min)
 915 {
 916     m_minimumPaneSize = min;
 917     SetSashPosition(m_sashPosition); // re-check limits
 918 }
 919
 920 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 921 {
 922     DoSetSashPosition(position);
 923
 924     if ( redraw )
 925     {
 926         SizeWindows();
 927     }
 928 }
 929
 930 // Initialize colours
 931 void wxSplitterWindow::InitColours()
 932 {
 933     wxDELETE( m_facePen );
 934     wxDELETE( m_faceBrush );
 935     wxDELETE( m_mediumShadowPen );
 936     wxDELETE( m_darkShadowPen );
 937     wxDELETE( m_lightShadowPen );
 938     wxDELETE( m_hilightPen );
 939
 940     // Shadow colours
 941 #ifndef __WIN16__
 942     wxColour faceColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 943     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 944     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 945
 946     wxColour mediumShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW));
 947     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 948
 949     wxColour darkShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW));
 950     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 951
 952     wxColour lightShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT));
 953     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 954
 955     wxColour hilightColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT));
 956     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 957 #else
 958     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 959     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 960     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 961     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 962     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 963     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 964 #endif // __WIN16__
 965 }
 966
 967 bool wxSplitterWindow::DoSendEvent(wxSplitterEvent& event)
 968 {
 969     return !GetEventHandler()->ProcessEvent(event) || event.IsAllowed();
 970 }
 971
 972 // ---------------------------------------------------------------------------
 973 // wxSplitterWindow virtual functions: they now just generate the events
 974 // ---------------------------------------------------------------------------
 975
 976 bool wxSplitterWindow::OnSashPositionChange(int WXUNUSED(newSashPosition))
 977 {
 978     // always allow by default
 979     return TRUE;
 980 }
 981
 982 int wxSplitterWindow::OnSashPositionChanging(int newSashPosition)
 983 {
 984     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 985     const int UNSPLIT_THRESHOLD = 4;
 986
 987     // first of all, check if OnSashPositionChange() doesn't forbid this change
 988     if ( !OnSashPositionChange(newSashPosition) )
 989     {
 990         // it does
 991         return -1;
 992     }
 993
 994     // Obtain relevant window dimension for bottom / right threshold check
 995     int window_size = GetWindowSize();
 996
 997     bool unsplit_scenario = FALSE;
 998     if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 999     {
1000         // Do edge detection if unsplit premitted
1001         if ( newSashPosition <= UNSPLIT_THRESHOLD )
1002         {
1003             // threshold top / left check
1004             newSashPosition = 0;
1005             unsplit_scenario = TRUE;
1006         }
1007         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
1008         {
1009             // threshold bottom/right check
1010             newSashPosition = window_size;
1011             unsplit_scenario = TRUE;
1012         }
1013     }
1014
1015     if ( !unsplit_scenario )
1016     {
1017         // If resultant pane would be too small, enlarge it
1018         newSashPosition = AdjustSashPosition(newSashPosition);
1019     }
1020
1021     // If the result is out of bounds it means minimum size is too big,
1022     // so split window in half as best compromise.
1023     if ( newSashPosition < 0 || newSashPosition > window_size )
1024         newSashPosition = window_size / 2;
1025
1026     // now let the event handler have it
1027     //
1028     // FIXME: shouldn't we do it before the adjustments above so as to ensure
1029     //        that the sash position is always reasonable?
1030     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING, this);
1031     event.m_data.pos = newSashPosition;
1032
1033     if ( !DoSendEvent(event) )
1034     {
1035         // the event handler vetoed the change
1036         newSashPosition = -1;
1037     }
1038     else
1039     {
1040         // it could have been changed by it
1041         newSashPosition = event.GetSashPosition();
1042     }
1043
1044     return newSashPosition;
1045 }
1046
1047 // Called when the sash is double-clicked. The default behaviour is to remove
1048 // the sash if the minimum pane size is zero.
1049 void wxSplitterWindow::OnDoubleClickSash(int x, int y)
1050 {
1051     wxCHECK_RET(m_windowTwo, wxT("splitter: no window to remove"));
1052
1053     // new code should handle events instead of using the virtual functions
1054     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED, this);
1055     event.m_data.pt.x = x;
1056     event.m_data.pt.y = y;
1057     if ( DoSendEvent(event) )
1058     {
1059         if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
1060         {
1061             wxWindow* win = m_windowTwo;
1062             if (Unsplit(win))
1063                 OnUnsplit(win);
1064         }
1065     }
1066     //else: blocked by user
1067 }
1068
1069 void wxSplitterWindow::OnUnsplit(wxWindow *winRemoved)
1070 {
1071     // do it before calling the event handler which may delete the window
1072     winRemoved->Show(FALSE);
1073
1074     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
1075     event.m_data.win = winRemoved;
1076
1077     (void)DoSendEvent(event);
1078 }
1079
1080 #if defined( __WXMSW__ ) || defined( __WXMAC__)
1081
1082 // this is currently called (and needed) under MSW only...
1083 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& event)
1084 {
1085     // if we don't do it, the resizing cursor might be set for child window:
1086     // and like this we explicitly say that our cursor should not be used for
1087     // children windows which overlap us
1088
1089     if ( SashHitTest(event.GetX(), event.GetY()) )
1090     {
1091         // default processing is ok
1092         event.Skip();
1093     }
1094     //else: do nothing, in particular, don't call Skip()
1095 }
1096
1097 #endif // wxUSE_SPLITTER
1098 #endif // wxMSW
1099