src/generic/splitter.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        splitter.cpp
   3 // Purpose:     wxSplitterWindow implementation
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "splitter.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/window.h"
  25     #include "wx/dialog.h"
  26     #include "wx/frame.h"
  27 #endif
  28
  29 #include <stdlib.h>
  30
  31 #include "wx/string.h"
  32 #include "wx/splitter.h"
  33 #include "wx/dcscreen.h"
  34 #include "wx/settings.h"
  35 #include "wx/log.h"
  36 #include "wx/utils.h"
  37
  38 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED)
  39 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING)
  40 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED)
  41 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_UNSPLIT)
  42
  43 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  44 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxNotifyEvent)
  45
  46 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  47     EVT_PAINT(wxSplitterWindow::OnPaint)
  48     EVT_SIZE(wxSplitterWindow::OnSize)
  49     EVT_IDLE(wxSplitterWindow::OnIdle)
  50     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  51
  52 #ifdef __WXMSW__
  53     EVT_SET_CURSOR(wxSplitterWindow::OnSetCursor)
  54 #endif // wxMSW
  55
  56     WX_EVENT_TABLE_CONTROL_CONTAINER(wxSplitterWindow)
  57 END_EVENT_TABLE()
  58
  59 WX_DELEGATE_TO_CONTROL_CONTAINER(wxSplitterWindow);
  60
  61 bool wxSplitterWindow::Create(wxWindow *parent, wxWindowID id,
  62                                    const wxPoint& pos,
  63                                    const wxSize& size,
  64                                    long style,
  65                                    const wxString& name)
  66 {
  67     // allow TABbing from one window to the other
  68     style |= wxTAB_TRAVERSAL;
  69
  70     if (!wxWindow::Create(parent, id, pos, size, style, name))
  71         return FALSE;
  72
  73     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  74
  75     if ( style & wxSP_3DSASH )
  76         m_sashSize = 7;
  77     else
  78         m_sashSize = 3;
  79
  80     if ( style & wxSP_3DBORDER )
  81         m_borderSize = 2;
  82     else if ( style & wxSP_BORDER )
  83         m_borderSize = 1;
  84     else
  85         m_borderSize = 0;
  86
  87 #ifdef __WXMAC__
  88     int major,minor;
  89     wxGetOsVersion( &major, &minor );
  90     if (major >= 10)
  91         m_windowStyle |= wxSP_SASH_AQUA;
  92 #endif
  93
  94     return TRUE;
  95 }
  96
  97 void wxSplitterWindow::Init()
  98 {
  99     m_container.SetContainerWindow(this);
 100
 101     m_splitMode = wxSPLIT_VERTICAL;
 102     m_permitUnsplitAlways = TRUE;
 103     m_windowOne = (wxWindow *) NULL;
 104     m_windowTwo = (wxWindow *) NULL;
 105     m_dragMode = wxSPLIT_DRAG_NONE;
 106     m_oldX = 0;
 107     m_oldY = 0;
 108     m_firstX = 0;
 109     m_firstY = 0;
 110     m_sashSize = 7;
 111     m_borderSize = 2;
 112     m_sashPosition = m_requestedSashPosition = 0;
 113     m_minimumPaneSize = 0;
 114     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 115     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 116     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 117     m_lightShadowPen = (wxPen *) NULL;
 118     m_mediumShadowPen = (wxPen *) NULL;
 119     m_darkShadowPen = (wxPen *) NULL;
 120     m_faceBrush = (wxBrush *) NULL;
 121     m_facePen = (wxPen *) NULL;
 122     m_hilightPen = (wxPen *) NULL;
 123
 124     m_borderSize = 0;
 125     m_sashSize = 3;
 126
 127     InitColours();
 128
 129     m_needUpdating = FALSE;
 130 }
 131
 132 wxSplitterWindow::~wxSplitterWindow()
 133 {
 134     delete m_sashCursorWE;
 135     delete m_sashCursorNS;
 136     delete m_sashTrackerPen;
 137     delete m_lightShadowPen;
 138     delete m_darkShadowPen;
 139     delete m_mediumShadowPen;
 140     delete m_hilightPen;
 141     delete m_facePen;
 142     delete m_faceBrush;
 143 }
 144
 145 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 146 {
 147     wxPaintDC dc(this);
 148
 149     if ( m_borderSize > 0 )
 150         DrawBorders(dc);
 151     DrawSash(dc);
 152 }
 153
 154 void wxSplitterWindow::OnIdle(wxIdleEvent& event)
 155 {
 156     if (m_needUpdating)
 157         SizeWindows();
 158
 159     event.Skip();
 160 }
 161
 162 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 163 {
 164     int x = (int)event.GetX(),
 165         y = (int)event.GetY();
 166
 167     // reset the cursor
 168 #ifdef __WXMOTIF__
 169     SetCursor(* wxSTANDARD_CURSOR);
 170 #endif
 171 #ifdef __WXMSW__
 172     SetCursor(wxCursor());
 173 #endif
 174
 175     if (GetWindowStyle() & wxSP_NOSASH)
 176         return;
 177
 178     if (event.LeftDown())
 179     {
 180         if ( SashHitTest(x, y) )
 181         {
 182             CaptureMouse();
 183
 184             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 185
 186             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 187             {
 188                 DrawSashTracker(x, y);
 189             }
 190
 191             m_oldX = x;
 192             m_oldY = y;
 193
 194             if ( m_splitMode == wxSPLIT_VERTICAL )
 195             {
 196                 SetCursor(*m_sashCursorWE);
 197             }
 198             else
 199             {
 200                 SetCursor(*m_sashCursorNS);
 201             }
 202             return;
 203         }
 204     }
 205     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 206     {
 207         // We can stop dragging now and see what we've got.
 208         m_dragMode = wxSPLIT_DRAG_NONE;
 209         ReleaseMouse();
 210
 211         // Erase old tracker
 212         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 213         {
 214             DrawSashTracker(m_oldX, m_oldY);
 215         }
 216
 217         // the position of the click doesn't exactly correspond to
 218         // m_sashPosition, rather it changes it by the distance by which the
 219         // mouse has moved
 220         int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
 221
 222         int posSashNew = OnSashPositionChanging(m_sashPosition + diff);
 223         if ( posSashNew == -1 )
 224         {
 225             // change not allowed
 226             return;
 227         }
 228
 229         if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 230         {
 231             // Deal with possible unsplit scenarios
 232             if ( posSashNew == 0 )
 233             {
 234                 // We remove the first window from the view
 235                 wxWindow *removedWindow = m_windowOne;
 236                 m_windowOne = m_windowTwo;
 237                 m_windowTwo = (wxWindow *) NULL;
 238                 OnUnsplit(removedWindow);
 239                 DoSetSashPosition(0);
 240             }
 241             else if ( posSashNew == GetWindowSize() )
 242             {
 243                 // We remove the second window from the view
 244                 wxWindow *removedWindow = m_windowTwo;
 245                 m_windowTwo = (wxWindow *) NULL;
 246                 OnUnsplit(removedWindow);
 247                 DoSetSashPosition(0);
 248             }
 249             else
 250             {
 251                 DoSetSashPosition(posSashNew);
 252             }
 253         }
 254         else
 255         {
 256             DoSetSashPosition(posSashNew);
 257         }
 258
 259         SizeWindows();
 260     }  // left up && dragging
 261     else if (event.Moving() && !event.Dragging())
 262     {
 263         // Just change the cursor if required
 264         if ( SashHitTest(x, y) )
 265         {
 266                 if ( m_splitMode == wxSPLIT_VERTICAL )
 267                 {
 268                     SetCursor(*m_sashCursorWE);
 269                 }
 270                 else
 271                 {
 272                     SetCursor(*m_sashCursorNS);
 273                 }
 274         }
 275 #if defined(__WXGTK__) || defined(__WXMSW__)
 276         else
 277         {
 278             // We must set the normal cursor in MSW, because
 279             // if the child window doesn't have a cursor, the
 280             // parent's (splitter window) will be used, and this
 281             // must be the standard cursor.
 282
 283             // where else do we unset the cursor?
 284             SetCursor(* wxSTANDARD_CURSOR);
 285         }
 286 #endif // __WXGTK__
 287     }
 288     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 289     {
 290 #ifdef __WXMSW__
 291         // Otherwise, the cursor sometimes reverts to the normal cursor
 292         // during dragging.
 293         if ( m_splitMode == wxSPLIT_VERTICAL )
 294         {
 295             SetCursor(*m_sashCursorWE);
 296         }
 297         else
 298         {
 299             SetCursor(*m_sashCursorNS);
 300         }
 301 #endif // __WXMSW__
 302
 303         int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
 304
 305         int posSashNew = OnSashPositionChanging(m_sashPosition + diff);
 306         if ( posSashNew == -1 )
 307         {
 308             // change not allowed
 309             return;
 310         }
 311
 312         if ( posSashNew == m_sashPosition )
 313             return;
 314
 315         // Erase old tracker
 316         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 317         {
 318             DrawSashTracker(m_oldX, m_oldY);
 319         }
 320
 321         if (m_splitMode == wxSPLIT_VERTICAL)
 322             x = posSashNew;
 323         else
 324             y = posSashNew;
 325
 326         // Remember old positions
 327         m_oldX = x;
 328         m_oldY = y;
 329
 330 #ifdef __WXMSW__
 331         // As we captured the mouse, we may get the mouse events from outside
 332         // our window - for example, negative values in x, y. This has a weird
 333         // consequence under MSW where we use unsigned values sometimes and
 334         // signed ones other times: the coordinates turn as big positive
 335         // numbers and so the sash is drawn on the *right* side of the window
 336         // instead of the left (or bottom instead of top). Correct this.
 337         if ( (short)m_oldX < 0 )
 338             m_oldX = 0;
 339         if ( (short)m_oldY < 0 )
 340             m_oldY = 0;
 341 #endif // __WXMSW__
 342
 343         // Draw new one
 344         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 345         {
 346             DrawSashTracker(m_oldX, m_oldY);
 347         }
 348         else
 349         {
 350             DoSetSashPosition(posSashNew);
 351             m_needUpdating = TRUE;
 352         }
 353     }
 354     else if ( event.LeftDClick() )
 355     {
 356         OnDoubleClickSash(x, y);
 357     }
 358 }
 359
 360 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 361 {
 362     // only process this message if we're not iconized - otherwise iconizing
 363     // and restoring a window containing the splitter has a funny side effect
 364     // of changing the splitter position!
 365     wxWindow *parent = GetParent();
 366     while ( parent && !parent->IsTopLevel() )
 367     {
 368         parent = parent->GetParent();
 369     }
 370
 371     bool iconized = FALSE;
 372
 373     // wxMotif doesn't yet have a wxTopLevelWindow implementation
 374 #ifdef __WXMOTIF__
 375     wxFrame *winTop = wxDynamicCast(parent, wxFrame);
 376 #else
 377     wxTopLevelWindow *winTop = wxDynamicCast(parent, wxTopLevelWindow);
 378 #endif
 379     if ( winTop )
 380     {
 381         iconized = winTop->IsIconized();
 382     }
 383 #ifndef __WXMOTIF__
 384     else
 385     {
 386         wxFAIL_MSG(wxT("should have a top level parent!"));
 387
 388         iconized = FALSE;
 389     }
 390 #endif
 391
 392     if ( iconized )
 393     {
 394         event.Skip();
 395
 396         return;
 397     }
 398
 399     int cw, ch;
 400     GetClientSize( &cw, &ch );
 401     if ( m_windowTwo )
 402     {
 403         if ( m_splitMode == wxSPLIT_VERTICAL )
 404         {
 405             if ( m_sashPosition >= (cw - 5) )
 406                 DoSetSashPosition(wxMax(10, cw - 40));
 407         }
 408         else // m_splitMode == wxSPLIT_HORIZONTAL
 409         {
 410             if ( m_sashPosition >= (ch - 5) )
 411                 DoSetSashPosition(wxMax(10, ch - 40));
 412         }
 413     }
 414
 415     SizeWindows();
 416 }
 417
 418 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 419 {
 420     if ( m_windowTwo == NULL || m_sashPosition == 0)
 421         return FALSE; // No sash
 422
 423     if ( m_splitMode == wxSPLIT_VERTICAL )
 424     {
 425         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 426             return TRUE;
 427         else
 428             return FALSE;
 429     }
 430     else
 431     {
 432         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 433             return TRUE;
 434         else
 435             return FALSE;
 436     }
 437 }
 438
 439 // Draw 3D effect borders
 440 void wxSplitterWindow::DrawBorders(wxDC& dc)
 441 {
 442     int w, h;
 443     GetClientSize(&w, &h);
 444
 445     if ( GetWindowStyleFlag() & wxSP_3DBORDER )
 446     {
 447
 448         dc.SetPen(*m_facePen);
 449         dc.SetBrush(*m_faceBrush);
 450         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 451         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 452         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 453         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 454
 455         dc.SetPen(*m_mediumShadowPen);
 456         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 457         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 458
 459         dc.SetPen(*m_darkShadowPen);
 460         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 461         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 462
 463         dc.SetPen(*m_hilightPen);
 464         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 465         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.
 466                                      /// Anyway, h is required for MSW.
 467
 468         dc.SetPen(*m_lightShadowPen);
 469         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 470         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 471     }
 472     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 473     {
 474         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 475         dc.SetPen(*wxBLACK_PEN);
 476         dc.DrawRectangle(0, 0, w-1, h-1);
 477     }
 478
 479     dc.SetPen(wxNullPen);
 480     dc.SetBrush(wxNullBrush);
 481 }
 482
 483 // Draw the sash
 484 void wxSplitterWindow::DrawSash(wxDC& dc)
 485 {
 486     if ( m_sashPosition == 0 || !m_windowTwo)
 487         return;
 488     if (GetWindowStyle() & wxSP_NOSASH)
 489         return;
 490
 491     int w, h;
 492     GetClientSize(&w, &h);
 493
 494     if ( GetWindowStyleFlag() & wxSP_3DSASH )
 495     {
 496         if ( m_splitMode == wxSPLIT_VERTICAL )
 497         {
 498             dc.SetPen(*m_facePen);
 499
 500             if (HasFlag( wxSP_SASH_AQUA ))
 501                 dc.SetBrush(*wxWHITE_BRUSH);
 502             else
 503                 dc.SetBrush(*m_faceBrush);
 504             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 505
 506             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 507
 508             dc.SetPen(*m_lightShadowPen);
 509             int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 510             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 511
 512             dc.SetPen(*m_hilightPen);
 513             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 514
 515             if (!HasFlag( wxSP_SASH_AQUA ))
 516                 dc.SetPen(*m_mediumShadowPen);
 517
 518             int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 519             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 520
 521             if (HasFlag( wxSP_SASH_AQUA ))
 522                 dc.SetPen(*m_lightShadowPen);
 523             else
 524                 dc.SetPen(*m_darkShadowPen);
 525             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 526
 527             // Draw the top and bottom edges of the sash, if requested
 528             if (GetWindowStyle() & wxSP_FULLSASH)
 529             {
 530                 // Top
 531                 dc.SetPen(*m_hilightPen);
 532                 dc.DrawLine(m_sashPosition+1, m_borderSize, m_sashPosition+m_sashSize-1, m_borderSize);
 533
 534                 // Bottom
 535                 dc.SetPen(*m_darkShadowPen);
 536                 dc.DrawLine(m_sashPosition+1, h-m_borderSize-1, m_sashPosition+m_sashSize-1, h-m_borderSize-1);
 537             }
 538         }
 539         else
 540         {
 541             dc.SetPen(*m_facePen);
 542             if (HasFlag( wxSP_SASH_AQUA ))
 543                 dc.SetBrush(*wxWHITE_BRUSH);
 544             else
 545                 dc.SetBrush(*m_faceBrush);
 546             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 547
 548             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 549
 550             dc.SetPen(*m_lightShadowPen);
 551             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 552
 553             dc.SetPen(*m_hilightPen);
 554             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 555
 556             if (!HasFlag( wxSP_SASH_AQUA ))
 557                 dc.SetPen(*m_mediumShadowPen);
 558             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 559
 560             if (HasFlag( wxSP_SASH_AQUA ))
 561                 dc.SetPen(*m_lightShadowPen);
 562             else
 563                 dc.SetPen(*m_darkShadowPen);
 564             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 565
 566             // Draw the left and right edges of the sash, if requested
 567             if (GetWindowStyle() & wxSP_FULLSASH)
 568             {
 569                 // Left
 570                 dc.SetPen(*m_hilightPen);
 571                 dc.DrawLine(m_borderSize, m_sashPosition, m_borderSize, m_sashPosition+m_sashSize);
 572
 573                 // Right
 574                 dc.SetPen(*m_darkShadowPen);
 575                 dc.DrawLine(w-m_borderSize-1, m_sashPosition+1, w-m_borderSize-1, m_sashPosition+m_sashSize-1);
 576             }
 577         }
 578     }
 579     else
 580     {
 581         if ( m_splitMode == wxSPLIT_VERTICAL )
 582         {
 583             dc.SetPen(*wxBLACK_PEN);
 584             dc.SetBrush(*wxBLACK_BRUSH);
 585             int h1 = h-1;
 586             int y1 = 0;
 587             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 588                 h1 += 1; // Not sure why this is necessary...
 589             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 590             {
 591                 y1 = 2; h1 -= 3;
 592             }
 593             dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);
 594         }
 595         else
 596         {
 597             dc.SetPen(*wxBLACK_PEN);
 598             dc.SetBrush(*wxBLACK_BRUSH);
 599             int w1 = w-1;
 600             int x1 = 0;
 601             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )
 602                 w1 ++;
 603             if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)
 604             {
 605                 x1 = 2; w1 -= 3;
 606             }
 607             dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);
 608         }
 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 void wxSplitterWindow::DoSetSashPosition(int sashPos)
 720 {
 721     int newSashPosition = AdjustSashPosition(sashPos);
 722
 723     if ( newSashPosition != m_sashPosition )
 724     {
 725         m_sashPosition = newSashPosition;
 726
 727         wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED, this);
 728         event.m_data.pos = m_sashPosition;
 729
 730         (void)DoSendEvent(event);
 731     }
 732 }
 733
 734 // Position and size subwindows.
 735 // Note that the border size applies to each subwindow, not
 736 // including the edges next to the sash.
 737 void wxSplitterWindow::SizeWindows()
 738 {
 739     // check if we have delayed setting the real sash position
 740     if ( m_requestedSashPosition != INT_MAX )
 741     {
 742         int newSashPosition = ConvertSashPosition(m_requestedSashPosition);
 743         if ( newSashPosition != m_sashPosition )
 744         {
 745             DoSetSashPosition(newSashPosition);
 746         }
 747
 748         if ( newSashPosition == m_sashPosition )
 749         {
 750             // don't update it any more
 751             m_requestedSashPosition = INT_MAX;
 752         }
 753     }
 754
 755     int w, h;
 756     GetClientSize(&w, &h);
 757
 758     if ( GetWindow1() && !GetWindow2() )
 759     {
 760         GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 761                               w - 2*GetBorderSize(), h - 2*GetBorderSize());
 762     }
 763     else if ( GetWindow1() && GetWindow2() )
 764     {
 765         if (GetSplitMode() == wxSPLIT_VERTICAL)
 766         {
 767             int x1 = GetBorderSize();
 768             int y1 = GetBorderSize();
 769             int w1 = GetSashPosition() - GetBorderSize();
 770             int h1 = h - 2*GetBorderSize();
 771
 772             int x2 = GetSashPosition() + GetSashSize();
 773             int y2 = GetBorderSize();
 774             int w2 = w - 2*GetBorderSize() - GetSashSize() - w1;
 775             int h2 = h - 2*GetBorderSize();
 776
 777             GetWindow1()->SetSize(x1, y1, w1, h1);
 778             GetWindow2()->SetSize(x2, y2, w2, h2);
 779         }
 780         else
 781         {
 782             GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
 783                 w - 2*GetBorderSize(), GetSashPosition() - GetBorderSize());
 784             GetWindow2()->SetSize(GetBorderSize(), GetSashPosition() + GetSashSize(),
 785                 w - 2*GetBorderSize(), h - 2*GetBorderSize() - GetSashSize() - (GetSashPosition() - GetBorderSize()));
 786         }
 787     }
 788     wxClientDC dc(this);
 789     if ( GetBorderSize() > 0 )
 790         DrawBorders(dc);
 791     DrawSash(dc);
 792
 793     SetNeedUpdating(FALSE);
 794 }
 795
 796 // Set pane for unsplit window
 797 void wxSplitterWindow::Initialize(wxWindow *window)
 798 {
 799     m_windowOne = window;
 800     m_windowTwo = (wxWindow *) NULL;
 801     DoSetSashPosition(0);
 802 }
 803
 804 // Associates the given window with window 2, drawing the appropriate sash
 805 // and changing the split mode.
 806 // Does nothing and returns FALSE if the window is already split.
 807 bool wxSplitterWindow::DoSplit(wxSplitMode mode,
 808                                wxWindow *window1, wxWindow *window2,
 809                                int sashPosition)
 810 {
 811     if ( IsSplit() )
 812         return FALSE;
 813
 814     m_splitMode = mode;
 815     m_windowOne = window1;
 816     m_windowTwo = window2;
 817
 818     // remember the sash position we want to set for later if we can't set it
 819     // right now (e.g. because the window is too small)
 820     m_requestedSashPosition = sashPosition;
 821
 822     DoSetSashPosition(ConvertSashPosition(sashPosition));
 823
 824     SizeWindows();
 825
 826     return TRUE;
 827 }
 828
 829 int wxSplitterWindow::ConvertSashPosition(int sashPosition) const
 830 {
 831     if ( sashPosition > 0 )
 832     {
 833         return sashPosition;
 834     }
 835     else if ( sashPosition < 0 )
 836     {
 837         // It's negative so adding is subtracting
 838         return GetWindowSize() + sashPosition;
 839     }
 840     else // sashPosition == 0
 841     {
 842         // default, put it in the centre
 843         return GetWindowSize() / 2;
 844     }
 845 }
 846
 847 // Remove the specified (or second) window from the view
 848 // Doesn't actually delete the window.
 849 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 850 {
 851     if ( ! IsSplit() )
 852         return FALSE;
 853
 854     wxWindow *win = NULL;
 855     if ( toRemove == NULL || toRemove == m_windowTwo)
 856     {
 857         win = m_windowTwo ;
 858         m_windowTwo = (wxWindow *) NULL;
 859     }
 860     else if ( toRemove == m_windowOne )
 861     {
 862         win = m_windowOne ;
 863         m_windowOne = m_windowTwo;
 864         m_windowTwo = (wxWindow *) NULL;
 865     }
 866     else
 867     {
 868         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 869
 870         return FALSE;
 871     }
 872
 873     OnUnsplit(win);
 874     DoSetSashPosition(0);
 875     SizeWindows();
 876
 877     return TRUE;
 878 }
 879
 880 // Replace a window with another one
 881 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 882 {
 883     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 884     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 885
 886     if ( winOld == m_windowTwo )
 887     {
 888         m_windowTwo = winNew;
 889     }
 890     else if ( winOld == m_windowOne )
 891     {
 892         m_windowOne = winNew;
 893     }
 894     else
 895     {
 896         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 897
 898         return FALSE;
 899     }
 900
 901     SizeWindows();
 902
 903     return TRUE;
 904 }
 905
 906 void wxSplitterWindow::SetMinimumPaneSize(int min)
 907 {
 908     m_minimumPaneSize = min;
 909     SetSashPosition(m_sashPosition); // re-check limits
 910 }
 911
 912 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 913 {
 914     DoSetSashPosition(position);
 915
 916     if ( redraw )
 917     {
 918         SizeWindows();
 919     }
 920 }
 921
 922 // Initialize colours
 923 void wxSplitterWindow::InitColours()
 924 {
 925     wxDELETE( m_facePen );
 926     wxDELETE( m_faceBrush );
 927     wxDELETE( m_mediumShadowPen );
 928     wxDELETE( m_darkShadowPen );
 929     wxDELETE( m_lightShadowPen );
 930     wxDELETE( m_hilightPen );
 931
 932     // Shadow colours
 933 #ifndef __WIN16__
 934     wxColour faceColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 935     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 936     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 937
 938     wxColour mediumShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW));
 939     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 940
 941     wxColour darkShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW));
 942     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 943
 944     wxColour lightShadowColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT));
 945     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 946
 947     wxColour hilightColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT));
 948     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 949 #else
 950     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 951     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 952     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 953     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 954     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 955     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 956 #endif // __WIN16__
 957 }
 958
 959 bool wxSplitterWindow::DoSendEvent(wxSplitterEvent& event)
 960 {
 961     return !GetEventHandler()->ProcessEvent(event) || event.IsAllowed();
 962 }
 963
 964 // ---------------------------------------------------------------------------
 965 // wxSplitterWindow virtual functions: they now just generate the events
 966 // ---------------------------------------------------------------------------
 967
 968 bool wxSplitterWindow::OnSashPositionChange(int WXUNUSED(newSashPosition))
 969 {
 970     // always allow by default
 971     return TRUE;
 972 }
 973
 974 int wxSplitterWindow::OnSashPositionChanging(int newSashPosition)
 975 {
 976     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 977     const int UNSPLIT_THRESHOLD = 4;
 978
 979     // first of all, check if OnSashPositionChange() doesn't forbid this change
 980     if ( !OnSashPositionChange(newSashPosition) )
 981     {
 982         // it does
 983         return -1;
 984     }
 985
 986     // Obtain relevant window dimension for bottom / right threshold check
 987     int window_size = GetWindowSize();
 988
 989     bool unsplit_scenario = FALSE;
 990     if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
 991     {
 992         // Do edge detection if unsplit premitted
 993         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 994         {
 995             // threshold top / left check
 996             newSashPosition = 0;
 997             unsplit_scenario = TRUE;
 998         }
 999         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
1000         {
1001             // threshold bottom/right check
1002             newSashPosition = window_size;
1003             unsplit_scenario = TRUE;
1004         }
1005     }
1006
1007     if ( !unsplit_scenario )
1008     {
1009         // If resultant pane would be too small, enlarge it
1010         newSashPosition = AdjustSashPosition(newSashPosition);
1011     }
1012
1013     // If the result is out of bounds it means minimum size is too big,
1014     // so split window in half as best compromise.
1015     if ( newSashPosition < 0 || newSashPosition > window_size )
1016         newSashPosition = window_size / 2;
1017
1018     // now let the event handler have it
1019     //
1020     // FIXME: shouldn't we do it before the adjustments above so as to ensure
1021     //        that the sash position is always reasonable?
1022     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING, this);
1023     event.m_data.pos = newSashPosition;
1024
1025     if ( !DoSendEvent(event) )
1026     {
1027         // the event handler vetoed the change
1028         newSashPosition = -1;
1029     }
1030     else
1031     {
1032         // it could have been changed by it
1033         newSashPosition = event.GetSashPosition();
1034     }
1035
1036     return newSashPosition;
1037 }
1038
1039 // Called when the sash is double-clicked. The default behaviour is to remove
1040 // the sash if the minimum pane size is zero.
1041 void wxSplitterWindow::OnDoubleClickSash(int x, int y)
1042 {
1043     // new code should handle events instead of using the virtual functions
1044     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED, this);
1045     event.m_data.pt.x = x;
1046     event.m_data.pt.y = y;
1047     if ( DoSendEvent(event) )
1048     {
1049         if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
1050         {
1051             Unsplit();
1052         }
1053     }
1054     //else: blocked by user
1055 }
1056
1057 void wxSplitterWindow::OnUnsplit(wxWindow *winRemoved)
1058 {
1059     // do it before calling the event handler which may delete the window
1060     winRemoved->Show(FALSE);
1061
1062     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
1063     event.m_data.win = winRemoved;
1064
1065     (void)DoSendEvent(event);
1066 }
1067
1068 #ifdef __WXMSW__
1069
1070 // this is currently called (and needed) under MSW only...
1071 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& event)
1072 {
1073     // if we don't do it, the resizing cursor might be set for child window:
1074     // and like this we explicitly say that our cursor should not be used for
1075     // children windows which overlap us
1076
1077     if ( SashHitTest(event.GetX(), event.GetY()) )
1078     {
1079         // default processing is ok
1080         event.Skip();
1081     }
1082     //else: do nothing, in particular, don't call Skip()
1083 }
1084
1085 #endif // wxMSW
1086