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                 wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 257                 event.m_data.win = removedWindow;
 258                 (void)DoSendEvent(event);
 259                 SetSashPositionAndNotify(0);
 260             }
 261             else if ( posSashNew == GetWindowSize() )
 262             {
 263                 // We remove the second window from the view
 264                 wxWindow *removedWindow = m_windowTwo;
 265                 m_windowTwo = (wxWindow *) NULL;
 266                 OnUnsplit(removedWindow);
 267                 wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 268                 event.m_data.win = removedWindow;
 269                 (void)DoSendEvent(event);
 270                 SetSashPositionAndNotify(0);
 271             }
 272             else
 273             {
 274                 SetSashPositionAndNotify(posSashNew);
 275             }
 276         }
 277         else
 278         {
 279             SetSashPositionAndNotify(posSashNew);
 280         }
 281
 282         SizeWindows();
 283     }  // left up && dragging
 284     else if ((event.Moving() || event.Leaving() || event.Entering()) && (m_dragMode == wxSPLIT_DRAG_NONE))
 285     {
 286         // Just change the cursor as required
 287         if ( !event.Leaving() && SashHitTest(x, y) )
 288         {
 289             SetResizeCursor();
 290         }
 291         else
 292         {
 293             SetCursor(* wxSTANDARD_CURSOR);
 294         }
 295     }
 296     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 297     {
 298         int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
 299         if ( !diff )
 300         {
 301             // nothing to do, mouse didn't really move far enough
 302             return;
 303         }
 304
 305         int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
 306         int posSashNew = OnSashPositionChanging(posSashOld + diff);
 307         if ( posSashNew == -1 )
 308         {
 309             // change not allowed
 310             return;
 311         }
 312
 313         if ( posSashNew == m_sashPosition )
 314             return;
 315
 316         // Erase old tracker
 317         if ( !isLive )
 318         {
 319             DrawSashTracker(m_oldX, m_oldY);
 320         }
 321
 322         if (m_splitMode == wxSPLIT_VERTICAL)
 323             x = posSashNew;
 324         else
 325             y = posSashNew;
 326
 327         // Remember old positions
 328         m_oldX = x;
 329         m_oldY = y;
 330
 331 #ifdef __WXMSW__
 332         // As we captured the mouse, we may get the mouse events from outside
 333         // our window - for example, negative values in x, y. This has a weird
 334         // consequence under MSW where we use unsigned values sometimes and
 335         // signed ones other times: the coordinates turn as big positive
 336         // numbers and so the sash is drawn on the *right* side of the window
 337         // instead of the left (or bottom instead of top). Correct this.
 338         if ( (short)m_oldX < 0 )
 339             m_oldX = 0;
 340         if ( (short)m_oldY < 0 )
 341             m_oldY = 0;
 342 #endif // __WXMSW__
 343
 344         // Draw new one
 345         if ( !isLive )
 346         {
 347             m_sashPositionCurrent = posSashNew;
 348
 349             DrawSashTracker(m_oldX, m_oldY);
 350         }
 351         else
 352         {
 353             SetSashPositionAndNotify(posSashNew);
 354             m_needUpdating = TRUE;
 355         }
 356     }
 357     else if ( event.LeftDClick() && m_windowTwo )
 358     {
 359         OnDoubleClickSash(x, y);
 360     }
 361 }
 362
 363 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 364 {
 365     // only process this message if we're not iconized - otherwise iconizing
 366     // and restoring a window containing the splitter has a funny side effect
 367     // of changing the splitter position!
 368     wxWindow *parent = GetParent();
 369     while ( parent && !parent->IsTopLevel() )
 370     {
 371         parent = parent->GetParent();
 372     }
 373
 374     bool iconized = FALSE;
 375
 376     // wxMotif doesn't yet have a wxTopLevelWindow implementation
 377 #ifdef __WXMOTIF__
 378     wxFrame *winTop = wxDynamicCast(parent, wxFrame);
 379 #else
 380     wxTopLevelWindow *winTop = wxDynamicCast(parent, wxTopLevelWindow);
 381 #endif
 382     if ( winTop )
 383     {
 384         iconized = winTop->IsIconized();
 385     }
 386 #ifndef __WXMOTIF__
 387     else
 388     {
 389         wxFAIL_MSG(wxT("should have a top level parent!"));
 390
 391         iconized = FALSE;
 392     }
 393 #endif
 394
 395     if ( iconized )
 396     {
 397         event.Skip();
 398
 399         return;
 400     }
 401
 402     int cw, ch;
 403     GetClientSize( &cw, &ch );
 404     if ( m_windowTwo )
 405     {
 406         if ( m_splitMode == wxSPLIT_VERTICAL )
 407         {
 408             if ( m_sashPosition >= (cw - 5) )
 409                 SetSashPositionAndNotify(wxMax(10, cw - 40));
 410         }
 411         else // m_splitMode == wxSPLIT_HORIZONTAL
 412         {
 413             if ( m_sashPosition >= (ch - 5) )
 414                 SetSashPositionAndNotify(wxMax(10, ch - 40));
 415         }
 416     }
 417
 418     SizeWindows();
 419 }
 420
 421 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 422 {
 423     if ( m_windowTwo == NULL || m_sashPosition == 0)
 424         return FALSE; // No sash
 425
 426     if ( m_splitMode == wxSPLIT_VERTICAL )
 427     {
 428         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 429             return TRUE;
 430         else
 431             return FALSE;
 432     }
 433     else
 434     {
 435         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 436             return TRUE;
 437         else
 438             return FALSE;
 439     }
 440 }
 441
 442 // Draw 3D effect borders
 443 void wxSplitterWindow::DrawBorders(wxDC& dc)
 444 {
 445     int w, h;
 446     GetClientSize(&w, &h);
 447
 448     if ( GetWindowStyleFlag() & wxSP_3DBORDER )
 449     {
 450
 451         dc.SetPen(*m_facePen);
 452         dc.SetBrush(*m_faceBrush);
 453         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 454         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 455         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 456         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 457
 458         dc.SetPen(*m_mediumShadowPen);
 459         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 460         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 461
 462         dc.SetPen(*m_darkShadowPen);
 463         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 464         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 465
 466         dc.SetPen(*m_hilightPen);
 467         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 468         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.
 469                                      /// Anyway, h is required for MSW.
 470
 471         dc.SetPen(*m_lightShadowPen);
 472         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 473         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 474     }
 475     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 476     {
 477         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 478         dc.SetPen(*wxBLACK_PEN);
 479         dc.DrawRectangle(0, 0, w-1, h-1);
 480     }
 481
 482     dc.SetPen(wxNullPen);
 483     dc.SetBrush(wxNullBrush);
 484 }
 485
 486 // Draw the sash
 487 void wxSplitterWindow::DrawSash(wxDC& dc)
 488 {
 489     if ( m_sashPosition == 0 || !m_windowTwo)
 490         return;
 491     if (GetWindowStyle() & wxSP_NOSASH)
 492         return;
 493
 494     int w, h;
 495     GetClientSize(&w, &h);
 496
 497     if ( GetWindowStyleFlag() & wxSP_3DSASH )
 498     {
 499         if ( m_splitMode == wxSPLIT_VERTICAL )
 500         {
 501             dc.SetPen(*m_facePen);
 502
 503             if (HasFlag( wxSP_SASH_AQUA ))
 504                 dc.SetBrush(*wxWHITE_BRUSH);
 505             else
 506                 dc.SetBrush(*m_faceBrush);
 507             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 508
 509             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 510
 511             dc.SetPen(*m_lightShadowPen);
 512             int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 513             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 514
 515             dc.SetPen(*m_hilightPen);
 516             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 517
 518             if (!HasFlag( wxSP_SASH_AQUA ))
 519                 dc.SetPen(*m_mediumShadowPen);
 520
 521             int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 522             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 523
 524             if (HasFlag( wxSP_SASH_AQUA ))
 525                 dc.SetPen(*m_lightShadowPen);
 526             else
 527                 dc.SetPen(*m_darkShadowPen);
 528             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 529
 530             // Draw the top and bottom edges of the sash, if requested
 531             if (GetWindowStyle() & wxSP_FULLSASH)
 532             {
 533                 // Top
 534                 dc.SetPen(*m_hilightPen);
 535                 dc.DrawLine(m_sashPosition+1, m_borderSize, m_sashPosition+m_sashSize-1, m_borderSize);
 536
 537                 // Bottom
 538                 dc.SetPen(*m_darkShadowPen);
 539                 dc.DrawLine(m_sashPosition+1, h-m_borderSize-1, m_sashPosition+m_sashSize-1, h-m_borderSize-1);
 540             }
 541         }
 542         else // wxSPLIT_HORIZONTAL
 543         {
 544             dc.SetPen(*m_facePen);
 545             if (HasFlag( wxSP_SASH_AQUA ))
 546                 dc.SetBrush(*wxWHITE_BRUSH);
 547             else
 548                 dc.SetBrush(*m_faceBrush);
 549             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 550
 551             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 552
 553             dc.SetPen(*m_lightShadowPen);
 554             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 555
 556             dc.SetPen(*m_hilightPen);
 557             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 558
 559             if (!HasFlag( wxSP_SASH_AQUA ))
 560                 dc.SetPen(*m_mediumShadowPen);
 561             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 562
 563             if (HasFlag( wxSP_SASH_AQUA ))
 564                 dc.SetPen(*m_lightShadowPen);
 565             else
 566                 dc.SetPen(*m_darkShadowPen);
 567             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 568
 569             // Draw the left and right edges of the sash, if requested
 570             if (GetWindowStyle() & wxSP_FULLSASH)
 571             {
 572                 // Left
 573                 dc.SetPen(*m_hilightPen);
 574                 dc.DrawLine(m_borderSize, m_sashPosition, m_borderSize, m_sashPosition+m_sashSize);
 575
 576                 // Right
 577                 dc.SetPen(*m_darkShadowPen);
 578                 dc.DrawLine(w-m_borderSize-1, m_sashPosition+1, w-m_borderSize-1, m_sashPosition+m_sashSize-1);
 579             }
 580         }
 581     }
 582     else // !wxSP_3DSASH
 583     {
 584         dc.SetPen(*wxTRANSPARENT_PEN);
 585         dc.SetBrush(*m_faceBrush);
 586         if ( m_splitMode == wxSPLIT_VERTICAL )
 587         {
 588             int h1 = h-1;
 589             int y1 = 0;
 590             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 591                 h1 += 1; // Not sure why this is necessary...
 592             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 593             {
 594                 y1 = 2; h1 -= 3;
 595             }
 596             dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 597         }
 598         else // wxSPLIT_HORIZONTAL
 599         {
 600             int w1 = w-1;
 601             int x1 = 0;
 602             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 603                 w1 ++;
 604             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 605             {
 606                 x1 = 2; w1 -= 3;
 607             }
 608             dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 609         }
 610     }
 611
 612     dc.SetPen(wxNullPen);
 613     dc.SetBrush(wxNullBrush);
 614 }
 615
 616 // Draw the sash tracker (for whilst moving the sash)
 617 void wxSplitterWindow::DrawSashTracker(int x, int y)
 618 {
 619     int w, h;
 620     GetClientSize(&w, &h);
 621
 622     wxScreenDC screenDC;
 623     int x1, y1;
 624     int x2, y2;
 625
 626     if ( m_splitMode == wxSPLIT_VERTICAL )
 627     {
 628         x1 = x; y1 = 2;
 629         x2 = x; y2 = h-2;
 630
 631         if ( x1 > w )
 632         {
 633             x1 = w; x2 = w;
 634         }
 635         else if ( x1 < 0 )
 636         {
 637             x1 = 0; x2 = 0;
 638         }
 639     }
 640     else
 641     {
 642         x1 = 2; y1 = y;
 643         x2 = w-2; y2 = y;
 644
 645         if ( y1 > h )
 646         {
 647             y1 = h;
 648             y2 = h;
 649         }
 650         else if ( y1 < 0 )
 651         {
 652             y1 = 0;
 653             y2 = 0;
 654         }
 655     }
 656
 657     ClientToScreen(&x1, &y1);
 658     ClientToScreen(&x2, &y2);
 659
 660     screenDC.SetLogicalFunction(wxINVERT);
 661     screenDC.SetPen(*m_sashTrackerPen);
 662     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 663
 664     screenDC.DrawLine(x1, y1, x2, y2);
 665
 666     screenDC.SetLogicalFunction(wxCOPY);
 667
 668     screenDC.SetPen(wxNullPen);
 669     screenDC.SetBrush(wxNullBrush);
 670 }
 671
 672 int wxSplitterWindow::GetWindowSize() const
 673 {
 674     wxSize size = GetClientSize();
 675
 676     return m_splitMode == wxSPLIT_VERTICAL ? size.x : size.y;
 677 }
 678
 679 int wxSplitterWindow::AdjustSashPosition(int sashPos) const
 680 {
 681     int window_size = GetWindowSize();
 682
 683     wxWindow *win;
 684
 685     win = GetWindow1();
 686     if ( win )
 687     {
 688         // the window shouldn't be smaller than its own minimal size nor
 689         // smaller than the minimual pane size specified for this splitter
 690         int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
 691                                                       : win->GetMinHeight();
 692
 693         if ( minSize == -1 || m_minimumPaneSize > minSize )
 694             minSize = m_minimumPaneSize;
 695
 696         minSize += GetBorderSize();
 697
 698         if ( sashPos < minSize )
 699             sashPos = minSize;
 700     }
 701
 702     win = GetWindow2();
 703     if ( win )
 704     {
 705         int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
 706                                                       : win->GetMinHeight();
 707
 708         if ( minSize == -1 || m_minimumPaneSize > minSize )
 709             minSize = m_minimumPaneSize;
 710
 711         int maxSize = window_size - minSize - GetBorderSize();
 712         if ( sashPos > maxSize )
 713             sashPos = maxSize;
 714     }
 715
 716     return sashPos;
 717 }
 718
 719 bool wxSplitterWindow::DoSetSashPosition(int sashPos)
 720 {
 721     int newSashPosition = AdjustSashPosition(sashPos);
 722
 723     if ( newSashPosition == m_sashPosition )
 724         return FALSE;
 725
 726     m_sashPosition = newSashPosition;
 727
 728     return TRUE;
 729 }
 730
 731 void wxSplitterWindow::SetSashPositionAndNotify(int sashPos)
 732 {
 733     if ( DoSetSashPosition(sashPos) )
 734     {
 735         wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED, this);
 736         event.m_data.pos = m_sashPosition;
 737
 738         (void)DoSendEvent(event);
 739     }
 740 }
 741
 742 // Position and size subwindows.
 743 // Note that the border size applies to each subwindow, not
 744 // including the edges next to the sash.
 745 void wxSplitterWindow::SizeWindows()
 746 {
 747     // check if we have delayed setting the real sash position
 748     if ( m_requestedSashPosition != INT_MAX )
 749     {
 750         int newSashPosition = ConvertSashPosition(m_requestedSashPosition);
 751         if ( newSashPosition != m_sashPosition )
 752         {
 753             DoSetSashPosition(newSashPosition);
 754         }
 755
 756         if ( newSashPosition <= m_sashPosition
 757             && newSashPosition >= m_sashPosition - GetBorderSize() )
 758         {
 759             // don't update it any more
 760             m_requestedSashPosition = INT_MAX;
 761         }
 762     }
 763
 764     int w, h;
 765     GetClientSize(&w, &h);
 766
 767     if ( GetWindow1() && !GetWindow2() )
 768     {
 769         GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 770                               w - 2*GetBorderSize(), h - 2*GetBorderSize());
 771     }
 772     else if ( GetWindow1() && GetWindow2() )
 773     {
 774         if (GetSplitMode() == wxSPLIT_VERTICAL)
 775         {
 776             int x1 = GetBorderSize();
 777             int y1 = GetBorderSize();
 778             int w1 = GetSashPosition() - GetBorderSize();
 779             int h1 = h - 2*GetBorderSize();
 780
 781             int x2 = GetSashPosition() + GetSashSize();
 782             int y2 = GetBorderSize();
 783             int w2 = w - 2*GetBorderSize() - GetSashSize() - w1;
 784             int h2 = h - 2*GetBorderSize();
 785
 786             GetWindow1()->SetSize(x1, y1, w1, h1);
 787             GetWindow2()->SetSize(x2, y2, w2, h2);
 788         }
 789         else
 790         {
 791             GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 792                 w - 2*GetBorderSize(), GetSashPosition() - GetBorderSize());
 793             GetWindow2()->SetSize(GetBorderSize(), GetSashPosition() + GetSashSize(),
 794                 w - 2*GetBorderSize(), h - 2*GetBorderSize() - GetSashSize() - (GetSashPosition() - GetBorderSize()));
 795         }
 796     }
 797     wxClientDC dc(this);
 798     if ( GetBorderSize() > 0 )
 799         DrawBorders(dc);
 800     DrawSash(dc);
 801
 802     SetNeedUpdating(FALSE);
 803 }
 804
 805 // Set pane for unsplit window
 806 void wxSplitterWindow::Initialize(wxWindow *window)
 807 {
 808     wxASSERT_MSG( window && window->GetParent() == this,
 809                   _T("windows in the splitter should have it as parent!") );
 810
 811     m_windowOne = window;
 812     m_windowTwo = (wxWindow *) NULL;
 813     DoSetSashPosition(0);
 814 }
 815
 816 // Associates the given window with window 2, drawing the appropriate sash
 817 // and changing the split mode.
 818 // Does nothing and returns FALSE if the window is already split.
 819 bool wxSplitterWindow::DoSplit(wxSplitMode mode,
 820                                wxWindow *window1, wxWindow *window2,
 821                                int sashPosition)
 822 {
 823     if ( IsSplit() )
 824         return FALSE;
 825
 826     wxCHECK_MSG( window1 && window2, FALSE,
 827                  _T("can not split with NULL window(s)") );
 828
 829     wxCHECK_MSG( window1->GetParent() == this && window2->GetParent() == this, FALSE,
 830                   _T("windows in the splitter should have it as parent!") );
 831
 832     m_splitMode = mode;
 833     m_windowOne = window1;
 834     m_windowTwo = window2;
 835
 836     // remember the sash position we want to set for later if we can't set it
 837     // right now (e.g. because the window is too small)
 838     m_requestedSashPosition = sashPosition;
 839
 840     DoSetSashPosition(ConvertSashPosition(sashPosition));
 841
 842     SizeWindows();
 843
 844     return TRUE;
 845 }
 846
 847 int wxSplitterWindow::ConvertSashPosition(int sashPosition) const
 848 {
 849     if ( sashPosition > 0 )
 850     {
 851         return sashPosition;
 852     }
 853     else if ( sashPosition < 0 )
 854     {
 855         // It's negative so adding is subtracting
 856         return GetWindowSize() + sashPosition;
 857     }
 858     else // sashPosition == 0
 859     {
 860         // default, put it in the centre
 861         return GetWindowSize() / 2;
 862     }
 863 }
 864
 865 // Remove the specified (or second) window from the view
 866 // Doesn't actually delete the window.
 867 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 868 {
 869     if ( ! IsSplit() )
 870         return FALSE;
 871
 872     wxWindow *win = NULL;
 873     if ( toRemove == NULL || toRemove == m_windowTwo)
 874     {
 875         win = m_windowTwo ;
 876         m_windowTwo = (wxWindow *) NULL;
 877     }
 878     else if ( toRemove == m_windowOne )
 879     {
 880         win = m_windowOne ;
 881         m_windowOne = m_windowTwo;
 882         m_windowTwo = (wxWindow *) NULL;
 883     }
 884     else
 885     {
 886         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 887
 888         return FALSE;
 889     }
 890
 891     OnUnsplit(win);
 892     DoSetSashPosition(0);
 893     SizeWindows();
 894
 895     return TRUE;
 896 }
 897
 898 // Replace a window with another one
 899 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 900 {
 901     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 902     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 903
 904     if ( winOld == m_windowTwo )
 905     {
 906         m_windowTwo = winNew;
 907     }
 908     else if ( winOld == m_windowOne )
 909     {
 910         m_windowOne = winNew;
 911     }
 912     else
 913     {
 914         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 915
 916         return FALSE;
 917     }
 918
 919     SizeWindows();
 920
 921     return TRUE;
 922 }
 923
 924 void wxSplitterWindow::SetMinimumPaneSize(int min)
 925 {
 926     m_minimumPaneSize = min;
 927     SetSashPosition(m_sashPosition); // re-check limits
 928 }
 929
 930 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 931 {
 932     DoSetSashPosition(position);
 933
 934     if ( redraw )
 935     {
 936         SizeWindows();
 937     }
 938 }
 939
 940 // Initialize colours
 941 void wxSplitterWindow::InitColours()
 942 {
 943     wxDELETE( m_facePen );
 944     wxDELETE( m_faceBrush );
 945     wxDELETE( m_mediumShadowPen );
 946     wxDELETE( m_darkShadowPen );
 947     wxDELETE( m_lightShadowPen );
 948     wxDELETE( m_hilightPen );
 949
 950     // Shadow colours
 951 #ifndef __WIN16__
 952     wxColour faceColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 953     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 954     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 955
 956     wxColour mediumShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW));
 957     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 958
 959     wxColour darkShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW));
 960     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 961
 962     wxColour lightShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT));
 963     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 964
 965     wxColour hilightColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT));
 966     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 967 #else
 968     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 969     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 970     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 971     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 972     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 973     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 974 #endif // __WIN16__
 975 }
 976
 977 bool wxSplitterWindow::DoSendEvent(wxSplitterEvent& event)
 978 {
 979     return !GetEventHandler()->ProcessEvent(event) || event.IsAllowed();
 980 }
 981
 982 // ---------------------------------------------------------------------------
 983 // wxSplitterWindow virtual functions: they now just generate the events
 984 // ---------------------------------------------------------------------------
 985
 986 bool wxSplitterWindow::OnSashPositionChange(int WXUNUSED(newSashPosition))
 987 {
 988     // always allow by default
 989     return TRUE;
 990 }
 991
 992 int wxSplitterWindow::OnSashPositionChanging(int newSashPosition)
 993 {
 994     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 995     const int UNSPLIT_THRESHOLD = 4;
 996
 997     // first of all, check if OnSashPositionChange() doesn't forbid this change
 998     if ( !OnSashPositionChange(newSashPosition) )
 999     {
1000         // it does
1001         return -1;
1002     }
1003
1004     // Obtain relevant window dimension for bottom / right threshold check
1005     int window_size = GetWindowSize();
1006
1007     bool unsplit_scenario = FALSE;
1008     if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
1009     {
1010         // Do edge detection if unsplit premitted
1011         if ( newSashPosition <= UNSPLIT_THRESHOLD )
1012         {
1013             // threshold top / left check
1014             newSashPosition = 0;
1015             unsplit_scenario = TRUE;
1016         }
1017         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
1018         {
1019             // threshold bottom/right check
1020             newSashPosition = window_size;
1021             unsplit_scenario = TRUE;
1022         }
1023     }
1024
1025     if ( !unsplit_scenario )
1026     {
1027         // If resultant pane would be too small, enlarge it
1028         newSashPosition = AdjustSashPosition(newSashPosition);
1029     }
1030
1031     // If the result is out of bounds it means minimum size is too big,
1032     // so split window in half as best compromise.
1033     if ( newSashPosition < 0 || newSashPosition > window_size )
1034         newSashPosition = window_size / 2;
1035
1036     // now let the event handler have it
1037     //
1038     // FIXME: shouldn't we do it before the adjustments above so as to ensure
1039     //        that the sash position is always reasonable?
1040     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING, this);
1041     event.m_data.pos = newSashPosition;
1042
1043     if ( !DoSendEvent(event) )
1044     {
1045         // the event handler vetoed the change
1046         newSashPosition = -1;
1047     }
1048     else
1049     {
1050         // it could have been changed by it
1051         newSashPosition = event.GetSashPosition();
1052     }
1053
1054     return newSashPosition;
1055 }
1056
1057 // Called when the sash is double-clicked. The default behaviour is to remove
1058 // the sash if the minimum pane size is zero.
1059 void wxSplitterWindow::OnDoubleClickSash(int x, int y)
1060 {
1061     wxCHECK_RET(m_windowTwo, wxT("splitter: no window to remove"));
1062
1063     // new code should handle events instead of using the virtual functions
1064     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED, this);
1065     event.m_data.pt.x = x;
1066     event.m_data.pt.y = y;
1067     if ( DoSendEvent(event) )
1068     {
1069         if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
1070         {
1071             wxWindow* win = m_windowTwo;
1072             if ( Unsplit(win) )
1073             {
1074                 wxSplitterEvent unsplitEvent(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
1075                 unsplitEvent.m_data.win = win;
1076                 (void)DoSendEvent(unsplitEvent);
1077             }
1078         }
1079     }
1080     //else: blocked by user
1081 }
1082
1083 void wxSplitterWindow::OnUnsplit(wxWindow *winRemoved)
1084 {
1085     // call this before calling the event handler which may delete the window
1086     winRemoved->Show(FALSE);
1087 }
1088
1089 #if defined( __WXMSW__ ) || defined( __WXMAC__)
1090
1091 // this is currently called (and needed) under MSW only...
1092 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& event)
1093 {
1094     // if we don't do it, the resizing cursor might be set for child window:
1095     // and like this we explicitly say that our cursor should not be used for
1096     // children windows which overlap us
1097
1098     if ( SashHitTest(event.GetX(), event.GetY()) )
1099     {
1100         // default processing is ok
1101         event.Skip();
1102     }
1103     //else: do nothing, in particular, don't call Skip()
1104 }
1105
1106 #endif // wxUSE_SPLITTER
1107 #endif // wxMSW
1108