src/generic/splitter.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        splitter.cpp
   3 // Purpose:     wxSplitterWindow implementation
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "splitter.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/window.h"
  25     #include "wx/dialog.h"
  26     #include "wx/frame.h"
  27 #endif
  28
  29 #include <stdlib.h>
  30
  31 #include "wx/string.h"
  32 #include "wx/splitter.h"
  33 #include "wx/dcscreen.h"
  34 #include "wx/settings.h"
  35
  36 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
  37 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
  38
  39 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
  40     EVT_PAINT(wxSplitterWindow::OnPaint)
  41     EVT_SIZE(wxSplitterWindow::OnSize)
  42     EVT_IDLE(wxSplitterWindow::OnIdle)
  43     EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
  44
  45     EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
  46     // NB: we borrow OnSashPosChanged for purposes of
  47     // EVT_SPLITTER_SASH_POS_CHANGING since default implementation is identical
  48     EVT_SPLITTER_SASH_POS_CHANGING(-1, wxSplitterWindow::OnSashPosChanged)
  49     EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
  50     EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
  51 END_EVENT_TABLE()
  52
  53 wxSplitterWindow::wxSplitterWindow()
  54 {
  55     m_splitMode = wxSPLIT_VERTICAL;
  56     m_permitUnsplitAlways = FALSE;
  57     m_windowOne = (wxWindow *) NULL;
  58     m_windowTwo = (wxWindow *) NULL;
  59     m_dragMode = wxSPLIT_DRAG_NONE;
  60     m_oldX = 0;
  61     m_oldY = 0;
  62     m_firstX = 0;
  63     m_firstY = 0;
  64     m_sashSize = 7;
  65     m_borderSize = 2;
  66     m_sashPosition = 0;
  67     m_sashCursorWE = (wxCursor *) NULL;
  68     m_sashCursorNS = (wxCursor *) NULL;
  69     m_sashTrackerPen = (wxPen *) NULL;
  70     m_lightShadowPen = (wxPen *) NULL;
  71     m_mediumShadowPen = (wxPen *) NULL;
  72     m_darkShadowPen = (wxPen *) NULL;
  73     m_faceBrush = (wxBrush *) NULL;
  74     m_facePen = (wxPen *) NULL;
  75     m_hilightPen = (wxPen *) NULL;
  76     m_minimumPaneSize = 0;
  77     m_needUpdating = FALSE;
  78 }
  79
  80 wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
  81                                    const wxPoint& pos,
  82                                    const wxSize& size,
  83                                    long style,
  84                                    const wxString& name)
  85                 : wxWindow(parent, id, pos, size, style, name)
  86 {
  87     m_splitMode = wxSPLIT_VERTICAL;
  88     m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
  89     m_windowOne = (wxWindow *) NULL;
  90     m_windowTwo = (wxWindow *) NULL;
  91     m_dragMode = wxSPLIT_DRAG_NONE;
  92     m_oldX = 0;
  93     m_oldY = 0;
  94     m_firstX = 0;
  95     m_firstY = 0;
  96     m_sashSize = 7;
  97     m_borderSize = 2;
  98     m_sashPosition = 0;
  99     m_minimumPaneSize = 0;
 100     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
 101     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
 102     m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
 103     m_lightShadowPen = (wxPen *) NULL;
 104     m_mediumShadowPen = (wxPen *) NULL;
 105     m_darkShadowPen = (wxPen *) NULL;
 106     m_faceBrush = (wxBrush *) NULL;
 107     m_facePen = (wxPen *) NULL;
 108     m_hilightPen = (wxPen *) NULL;
 109
 110     if ( style & wxSP_3D )
 111     {
 112         m_borderSize = 2;
 113         m_sashSize = 7;
 114     }
 115     else if ( style & wxSP_BORDER )
 116     {
 117         m_borderSize = 1;
 118         m_sashSize = 3;
 119     }
 120     else
 121     {
 122         m_borderSize = 0;
 123         m_sashSize = 3;
 124     }
 125
 126     // Eventually, we'll respond to colour change messages
 127     InitColours();
 128
 129     // For debugging purposes, to see the background.
 130 //    SetBackground(wxBLUE_BRUSH);
 131
 132     m_needUpdating = FALSE;
 133 }
 134
 135 wxSplitterWindow::~wxSplitterWindow()
 136 {
 137     delete m_sashCursorWE;
 138     delete m_sashCursorNS;
 139     delete m_sashTrackerPen;
 140     delete m_lightShadowPen;
 141     delete m_darkShadowPen;
 142     delete m_mediumShadowPen;
 143     delete m_hilightPen;
 144     delete m_facePen;
 145     delete m_faceBrush;
 146 }
 147
 148 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
 149 {
 150     wxPaintDC dc(this);
 151
 152     if ( m_borderSize > 0 )
 153         DrawBorders(dc);
 154     DrawSash(dc);
 155 }
 156
 157 void wxSplitterWindow::OnIdle(wxIdleEvent& WXUNUSED(event))
 158 {
 159     if (m_needUpdating)
 160         SizeWindows();
 161 }
 162
 163 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
 164 {
 165     wxCoord x = (wxCoord)event.GetX(),
 166             y = (wxCoord)event.GetY();
 167
 168     // reset the cursor
 169 #ifdef __WXMOTIF__
 170     SetCursor(* wxSTANDARD_CURSOR);
 171 #endif
 172 #ifdef __WXMSW__
 173     SetCursor(wxCursor());
 174 #endif
 175
 176
 177     if (event.LeftDown())
 178     {
 179         if ( SashHitTest(x, y) )
 180         {
 181             CaptureMouse();
 182
 183             m_dragMode = wxSPLIT_DRAG_DRAGGING;
 184
 185             if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 186             {
 187                 DrawSashTracker(x, y);
 188             }
 189
 190             m_oldX = x;
 191             m_oldY = y;
 192
 193             if ( m_splitMode == wxSPLIT_VERTICAL )
 194             {
 195                 SetCursor(*m_sashCursorWE);
 196             }
 197             else
 198             {
 199                 SetCursor(*m_sashCursorNS);
 200             }
 201             return;
 202         }
 203     }
 204     else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
 205     {
 206         // We can stop dragging now and see what we've got.
 207         m_dragMode = wxSPLIT_DRAG_NONE;
 208         ReleaseMouse();
 209
 210         // Erase old tracker
 211         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 212         {
 213             DrawSashTracker(m_oldX, m_oldY);
 214         }
 215
 216         // Obtain window size. We are only interested in the dimension the sash
 217         // splits up
 218         int w, h;
 219         GetClientSize(&w, &h);
 220         int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
 221         int new_sash_position =
 222             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 223
 224         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
 225                                       this);
 226         eventSplitter.m_data.pos = new_sash_position;
 227         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 228         {
 229             new_sash_position = eventSplitter.GetSashPosition();
 230             if ( new_sash_position == -1 )
 231             {
 232                 // change not allowed
 233                 return;
 234             }
 235         }
 236
 237         if ( m_permitUnsplitAlways
 238                 || m_minimumPaneSize == 0 )
 239         {
 240             // Deal with possible unsplit scenarios
 241             if ( new_sash_position == 0 )
 242             {
 243                 // We remove the first window from the view
 244                 wxWindow *removedWindow = m_windowOne;
 245                 m_windowOne = m_windowTwo;
 246                 m_windowTwo = (wxWindow *) NULL;
 247                 SendUnsplitEvent(removedWindow);
 248                 m_sashPosition = 0;
 249             }
 250             else if ( new_sash_position == window_size )
 251             {
 252                 // We remove the second window from the view
 253                 wxWindow *removedWindow = m_windowTwo;
 254                 m_windowTwo = (wxWindow *) NULL;
 255                 SendUnsplitEvent(removedWindow);
 256                 m_sashPosition = 0;
 257             }
 258             else
 259             {
 260                 m_sashPosition = new_sash_position;
 261             }
 262         }
 263         else
 264         {
 265             m_sashPosition = new_sash_position;
 266         }
 267
 268         SizeWindows();
 269     }  // left up && dragging
 270     else if (event.Moving() && !event.Dragging())
 271     {
 272         // Just change the cursor if required
 273         if ( SashHitTest(x, y) )
 274         {
 275                 if ( m_splitMode == wxSPLIT_VERTICAL )
 276                 {
 277                     SetCursor(*m_sashCursorWE);
 278                 }
 279                 else
 280                 {
 281                     SetCursor(*m_sashCursorNS);
 282                 }
 283         }
 284 #ifdef __WXGTK__
 285         else
 286         {
 287             // where else do we unset the cursor?
 288             SetCursor(* wxSTANDARD_CURSOR);
 289         }
 290 #endif // __WXGTK__
 291     }
 292     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 293     {
 294 #ifdef __WXMSW__
 295         // Otherwise, the cursor sometimes reverts to the normal cursor
 296         // during dragging.
 297         if ( m_splitMode == wxSPLIT_VERTICAL )
 298         {
 299             SetCursor(*m_sashCursorWE);
 300         }
 301         else
 302         {
 303             SetCursor(*m_sashCursorNS);
 304         }
 305 #endif
 306
 307         // Obtain window size. We are only interested in the dimension the sash
 308         // splits up
 309         int new_sash_position =
 310             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 311
 312         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 313                                       this);
 314         eventSplitter.m_data.pos = new_sash_position;
 315         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 316         {
 317             new_sash_position = eventSplitter.GetSashPosition();
 318             if ( new_sash_position == -1 )
 319             {
 320                 // change not allowed
 321                 return;
 322             }
 323         }
 324
 325         // Erase old tracker
 326         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 327         {
 328             DrawSashTracker(m_oldX, m_oldY);
 329         }
 330
 331         if (m_splitMode == wxSPLIT_VERTICAL)
 332             x = new_sash_position;
 333         else
 334             y = new_sash_position;
 335
 336         if (new_sash_position != -1)
 337         {
 338             // Only modify if permitted
 339             m_oldX = x;
 340             m_oldY = y;
 341         }
 342
 343 #ifdef __WXMSW__
 344         // As we captured the mouse, we may get the mouse events from outside
 345         // our window - for example, negative values in x, y. This has a weird
 346         // consequence under MSW where we use unsigned values sometimes and
 347         // signed ones other times: the coordinates turn as big positive
 348         // numbers and so the sash is drawn on the *right* side of the window
 349         // instead of the left (or bottom instead of top). Correct this.
 350         if ( (short)m_oldX < 0 )
 351             m_oldX = 0;
 352         if ( (short)m_oldY < 0 )
 353             m_oldY = 0;
 354 #endif // __WXMSW__
 355
 356         // Draw new one
 357         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 358         {
 359             DrawSashTracker(m_oldX, m_oldY);
 360         }
 361         else
 362         {
 363             m_sashPosition = new_sash_position;
 364             m_needUpdating = TRUE;
 365         }
 366     }
 367     else if ( event.LeftDClick() )
 368     {
 369         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 370                                       this);
 371         eventSplitter.m_data.pt.x = x;
 372         eventSplitter.m_data.pt.y = y;
 373
 374         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 375     }
 376 }
 377
 378 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 379 {
 380     // only process this message if we're not iconized - otherwise iconizing
 381     // and restoring a window containing the splitter has a funny side effect
 382     // of changing the splitter position!
 383     wxWindow *parent = GetParent();
 384     while ( parent && !parent->IsTopLevel() )
 385     {
 386         parent = parent->GetParent();
 387     }
 388
 389     bool iconized = FALSE;
 390     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 391     if ( frame )
 392         iconized = frame->IsIconized();
 393     else
 394     {
 395         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 396         if ( dialog )
 397             iconized = dialog->IsIconized();
 398         else
 399             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 400     }
 401
 402     if ( iconized )
 403     {
 404         event.Skip();
 405     }
 406     else
 407     {
 408         int cw, ch;
 409         GetClientSize( &cw, &ch );
 410         if ( m_windowTwo )
 411         {
 412             if ( m_splitMode == wxSPLIT_VERTICAL )
 413             {
 414                 if ( m_sashPosition >= (cw - 5) )
 415                     m_sashPosition = wxMax(10, cw - 40);
 416             }
 417             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 418             {
 419                 if ( m_sashPosition >= (ch - 5) )
 420                     m_sashPosition = wxMax(10, ch - 40);
 421             }
 422         }
 423
 424         SizeWindows();
 425     }
 426 }
 427
 428 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 429 {
 430     if ( m_windowTwo == NULL || m_sashPosition == 0)
 431         return FALSE; // No sash
 432
 433     if ( m_splitMode == wxSPLIT_VERTICAL )
 434     {
 435         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 436             return TRUE;
 437         else
 438             return FALSE;
 439     }
 440     else
 441     {
 442         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 443             return TRUE;
 444         else
 445             return FALSE;
 446     }
 447 }
 448
 449 // Draw 3D effect borders
 450 void wxSplitterWindow::DrawBorders(wxDC& dc)
 451 {
 452     int w, h;
 453     GetClientSize(&w, &h);
 454
 455     if ( GetWindowStyleFlag() & wxSP_3D )
 456     {
 457
 458         dc.SetPen(*m_facePen);
 459         dc.SetBrush(*m_faceBrush);
 460         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 461         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 462         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 463         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 464
 465         dc.SetPen(*m_mediumShadowPen);
 466         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 467         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 468
 469         dc.SetPen(*m_darkShadowPen);
 470         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 471         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 472
 473         dc.SetPen(*m_hilightPen);
 474         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 475         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.
 476                                      /// Anyway, h is required for MSW.
 477
 478         dc.SetPen(*m_lightShadowPen);
 479         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 480         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 481     }
 482     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 483     {
 484         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 485         dc.SetPen(*wxBLACK_PEN);
 486         dc.DrawRectangle(0, 0, w-1, h-1);
 487     }
 488
 489     dc.SetPen(wxNullPen);
 490     dc.SetBrush(wxNullBrush);
 491 }
 492
 493 // Draw the sash
 494 void wxSplitterWindow::DrawSash(wxDC& dc)
 495 {
 496     if ( m_sashPosition == 0 || !m_windowTwo)
 497         return;
 498
 499     int w, h;
 500     GetClientSize(&w, &h);
 501
 502     if ( GetWindowStyleFlag() & wxSP_3D )
 503     {
 504         if ( m_splitMode == wxSPLIT_VERTICAL )
 505         {
 506             dc.SetPen(*m_facePen);
 507             dc.SetBrush(*m_faceBrush);
 508             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 509
 510             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 511
 512             dc.SetPen(*m_lightShadowPen);
 513                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 514             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 515
 516             dc.SetPen(*m_hilightPen);
 517             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 518
 519             dc.SetPen(*m_mediumShadowPen);
 520                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 521             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 522
 523             dc.SetPen(*m_darkShadowPen);
 524             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 525         }
 526         else
 527         {
 528             dc.SetPen(*m_facePen);
 529             dc.SetBrush(*m_faceBrush);
 530             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 531
 532             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 533
 534             dc.SetPen(*m_lightShadowPen);
 535             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 536
 537             dc.SetPen(*m_hilightPen);
 538             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 539
 540             dc.SetPen(*m_mediumShadowPen);
 541             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 542
 543             dc.SetPen(*m_darkShadowPen);
 544             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 545         }
 546     }
 547     else
 548     {
 549         if ( m_splitMode == wxSPLIT_VERTICAL )
 550         {
 551             dc.SetPen(*wxBLACK_PEN);
 552             dc.SetBrush(*wxBLACK_BRUSH);
 553             int h1 = h-1;
 554             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 555                 h1 += 1; // Not sure why this is necessary...
 556             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 557         }
 558         else
 559         {
 560             dc.SetPen(*wxBLACK_PEN);
 561             dc.SetBrush(*wxBLACK_BRUSH);
 562             int w1 = w-1;
 563             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 564                 w1 ++;
 565
 566             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 567         }
 568
 569     }
 570
 571     dc.SetPen(wxNullPen);
 572     dc.SetBrush(wxNullBrush);
 573 }
 574
 575 // Draw the sash tracker (for whilst moving the sash)
 576 void wxSplitterWindow::DrawSashTracker(int x, int y)
 577 {
 578     int w, h;
 579     GetClientSize(&w, &h);
 580
 581     wxScreenDC screenDC;
 582     int x1, y1;
 583     int x2, y2;
 584
 585     if ( m_splitMode == wxSPLIT_VERTICAL )
 586     {
 587         x1 = x; y1 = 2;
 588         x2 = x; y2 = h-2;
 589
 590         if ( x1 > w )
 591         {
 592             x1 = w; x2 = w;
 593         }
 594         else if ( x1 < 0 )
 595         {
 596             x1 = 0; x2 = 0;
 597         }
 598     }
 599     else
 600     {
 601         x1 = 2; y1 = y;
 602         x2 = w-2; y2 = y;
 603
 604         if ( y1 > h )
 605         {
 606             y1 = h;
 607             y2 = h;
 608         }
 609         else if ( y1 < 0 )
 610         {
 611             y1 = 0;
 612             y2 = 0;
 613         }
 614     }
 615
 616     ClientToScreen(&x1, &y1);
 617     ClientToScreen(&x2, &y2);
 618
 619     screenDC.SetLogicalFunction(wxINVERT);
 620     screenDC.SetPen(*m_sashTrackerPen);
 621     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 622
 623     screenDC.DrawLine(x1, y1, x2, y2);
 624
 625     screenDC.SetLogicalFunction(wxCOPY);
 626
 627     screenDC.SetPen(wxNullPen);
 628     screenDC.SetBrush(wxNullBrush);
 629 }
 630
 631 // Position and size subwindows.
 632 // Note that the border size applies to each subwindow, not
 633 // including the edges next to the sash.
 634 void wxSplitterWindow::SizeWindows()
 635 {
 636     int w, h;
 637     GetClientSize(&w, &h);
 638
 639     if ( m_windowOne && !m_windowTwo )
 640     {
 641         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 642
 643     }
 644     else if ( m_windowOne && m_windowTwo )
 645     {
 646         if (m_splitMode == wxSPLIT_VERTICAL)
 647         {
 648             int x1 = m_borderSize;
 649             int y1 = m_borderSize;
 650             int w1 = m_sashPosition - m_borderSize;
 651             int h1 = h - 2*m_borderSize;
 652
 653             int x2 = m_sashPosition + m_sashSize;
 654             int y2 = m_borderSize;
 655             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 656             int h2 = h - 2*m_borderSize;
 657
 658             m_windowOne->SetSize(x1, y1, w1, h1);
 659             m_windowTwo->SetSize(x2, y2, w2, h2);
 660
 661         }
 662         else
 663         {
 664             m_windowOne->SetSize(m_borderSize, m_borderSize,
 665                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 666             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 667                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 668
 669         }
 670     }
 671     wxClientDC dc(this);
 672     if ( m_borderSize > 0 )
 673         DrawBorders(dc);
 674     DrawSash(dc);
 675 }
 676
 677 // Set pane for unsplit window
 678 void wxSplitterWindow::Initialize(wxWindow *window)
 679 {
 680     m_windowOne = window;
 681     m_windowTwo = (wxWindow *) NULL;
 682     m_sashPosition = 0;
 683 }
 684
 685 // Associates the given window with window 2, drawing the appropriate sash
 686 // and changing the split mode.
 687 // Does nothing and returns FALSE if the window is already split.
 688 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 689 {
 690     if ( IsSplit() )
 691         return FALSE;
 692
 693     int w, h;
 694     GetClientSize(&w, &h);
 695
 696     m_splitMode = wxSPLIT_VERTICAL;
 697     m_windowOne = window1;
 698     m_windowTwo = window2;
 699     if ( sashPosition > 0 )
 700         m_sashPosition = sashPosition;
 701     else if ( sashPosition < 0 )
 702         m_sashPosition = w - sashPosition;
 703     else    // default
 704         m_sashPosition = w/2;
 705
 706     SizeWindows();
 707
 708     return TRUE;
 709 }
 710
 711 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 712 {
 713     if ( IsSplit() )
 714         return FALSE;
 715
 716     int w, h;
 717     GetClientSize(&w, &h);
 718
 719     m_splitMode = wxSPLIT_HORIZONTAL;
 720     m_windowOne = window1;
 721     m_windowTwo = window2;
 722     if ( sashPosition > 0 )
 723         m_sashPosition = sashPosition;
 724     else if ( sashPosition < 0 )
 725         m_sashPosition = h - sashPosition;
 726     else    // default
 727         m_sashPosition = h/2;
 728
 729     SizeWindows();
 730
 731     return TRUE;
 732 }
 733
 734
 735 // Remove the specified (or second) window from the view
 736 // Doesn't actually delete the window.
 737 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 738 {
 739     if ( ! IsSplit() )
 740         return FALSE;
 741
 742     wxWindow *win = NULL;
 743     if ( toRemove == NULL || toRemove == m_windowTwo)
 744     {
 745         win = m_windowTwo ;
 746         m_windowTwo = (wxWindow *) NULL;
 747     }
 748     else if ( toRemove == m_windowOne )
 749     {
 750         win = m_windowOne ;
 751         m_windowOne = m_windowTwo;
 752         m_windowTwo = (wxWindow *) NULL;
 753     }
 754     else
 755     {
 756         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 757
 758         return FALSE;
 759     }
 760
 761     SendUnsplitEvent(win);
 762     m_sashPosition = 0;
 763     SizeWindows();
 764
 765     return TRUE;
 766 }
 767
 768 // Replace a window with another one
 769 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 770 {
 771     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 772     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 773
 774     if ( winOld == m_windowTwo )
 775     {
 776         m_windowTwo = winNew;
 777     }
 778     else if ( winOld == m_windowOne )
 779     {
 780         m_windowOne = winNew;
 781     }
 782     else
 783     {
 784         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 785
 786         return FALSE;
 787     }
 788
 789     SizeWindows();
 790
 791     return TRUE;
 792 }
 793
 794 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 795 {
 796     m_sashPosition = position;
 797
 798     if ( redraw )
 799     {
 800         SizeWindows();
 801     }
 802 }
 803
 804 // Initialize colours
 805 void wxSplitterWindow::InitColours()
 806 {
 807     wxDELETE( m_facePen );
 808     wxDELETE( m_faceBrush );
 809     wxDELETE( m_mediumShadowPen );
 810     wxDELETE( m_darkShadowPen );
 811     wxDELETE( m_lightShadowPen );
 812     wxDELETE( m_hilightPen );
 813
 814     // Shadow colours
 815 #if defined(__WIN95__)
 816     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 817     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 818     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 819
 820     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 821     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 822
 823     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 824     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 825
 826     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 827     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 828
 829     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 830     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 831 #else // !Win32
 832     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 833     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 834     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 835     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 836     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 837     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 838 #endif // Win32/!Win32
 839 }
 840
 841 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 842 {
 843     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 844     event.m_data.win = winRemoved;
 845
 846     (void)GetEventHandler()->ProcessEvent(event);
 847 }
 848
 849 // ---------------------------------------------------------------------------
 850 // splitter event handlers
 851 // ---------------------------------------------------------------------------
 852
 853 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 854 {
 855     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 856     const int UNSPLIT_THRESHOLD = 4;
 857
 858     int newSashPosition = event.GetSashPosition();
 859
 860     // Obtain relevant window dimension for bottom / right threshold check
 861     int w, h;
 862     GetClientSize(&w, &h);
 863     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 864
 865     bool unsplit_scenario = FALSE;
 866     if ( m_permitUnsplitAlways
 867             || m_minimumPaneSize == 0 )
 868     {
 869         // Do edge detection if unsplit premitted
 870         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 871         {
 872             // threshold top / left check
 873             newSashPosition = 0;
 874             unsplit_scenario = TRUE;
 875         }
 876         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 877         {
 878             // threshold bottom/right check
 879             newSashPosition = window_size;
 880             unsplit_scenario = TRUE;
 881         }
 882     }
 883
 884     if ( !unsplit_scenario )
 885     {
 886         // If resultant pane would be too small, enlarge it
 887         if ( newSashPosition < m_minimumPaneSize )
 888             newSashPosition = m_minimumPaneSize;
 889         if ( newSashPosition > window_size - m_minimumPaneSize )
 890             newSashPosition = window_size - m_minimumPaneSize;
 891     }
 892
 893     // If the result is out of bounds it means minimum size is too big,
 894     // so split window in half as best compromise.
 895     if ( newSashPosition < 0 || newSashPosition > window_size )
 896         newSashPosition = window_size / 2;
 897
 898     // for compatibility, call the virtual function
 899     if ( !OnSashPositionChange(newSashPosition) )
 900     {
 901         newSashPosition = -1;
 902     }
 903
 904     event.SetSashPosition(newSashPosition);
 905 }
 906
 907 // Called when the sash is double-clicked. The default behaviour is to remove
 908 // the sash if the minimum pane size is zero.
 909 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 910 {
 911     // for compatibility, call the virtual function
 912     OnDoubleClickSash(event.GetX(), event.GetY());
 913
 914     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 915     {
 916         Unsplit();
 917     }
 918 }
 919
 920 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 921 {
 922     wxWindow *win = event.GetWindowBeingRemoved();
 923
 924     // do it before calling OnUnsplit() which may delete the window
 925     win->Show(FALSE);
 926
 927     // for compatibility, call the virtual function
 928     OnUnsplit(win);
 929 }