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         m_needUpdating = FALSE;
 270     }  // left up && dragging
 271     else if (event.Moving() && !event.Dragging())
 272     {
 273         // Just change the cursor if required
 274         if ( SashHitTest(x, y) )
 275         {
 276                 if ( m_splitMode == wxSPLIT_VERTICAL )
 277                 {
 278                     SetCursor(*m_sashCursorWE);
 279                 }
 280                 else
 281                 {
 282                     SetCursor(*m_sashCursorNS);
 283                 }
 284         }
 285 #ifdef __WXGTK__
 286         else
 287         {
 288             // where else do we unset the cursor?
 289             SetCursor(* wxSTANDARD_CURSOR);
 290         }
 291 #endif // __WXGTK__
 292
 293         m_needUpdating = FALSE;
 294     }
 295     else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
 296     {
 297 #ifdef __WXMSW__
 298         // Otherwise, the cursor sometimes reverts to the normal cursor
 299         // during dragging.
 300         if ( m_splitMode == wxSPLIT_VERTICAL )
 301         {
 302             SetCursor(*m_sashCursorWE);
 303         }
 304         else
 305         {
 306             SetCursor(*m_sashCursorNS);
 307         }
 308 #endif
 309
 310         // Obtain window size. We are only interested in the dimension the sash
 311         // splits up
 312         int new_sash_position =
 313             (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
 314
 315         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,
 316                                       this);
 317         eventSplitter.m_data.pos = new_sash_position;
 318         if ( GetEventHandler()->ProcessEvent(eventSplitter) )
 319         {
 320             new_sash_position = eventSplitter.GetSashPosition();
 321             if ( new_sash_position == -1 )
 322             {
 323                 // change not allowed
 324                 return;
 325             }
 326         }
 327
 328         // Erase old tracker
 329         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 330         {
 331             DrawSashTracker(m_oldX, m_oldY);
 332         }
 333
 334         if (m_splitMode == wxSPLIT_VERTICAL)
 335             x = new_sash_position;
 336         else
 337             y = new_sash_position;
 338
 339         if (new_sash_position != -1)
 340         {
 341             // Only modify if permitted
 342             m_oldX = x;
 343             m_oldY = y;
 344         }
 345
 346 #ifdef __WXMSW__
 347         // As we captured the mouse, we may get the mouse events from outside
 348         // our window - for example, negative values in x, y. This has a weird
 349         // consequence under MSW where we use unsigned values sometimes and
 350         // signed ones other times: the coordinates turn as big positive
 351         // numbers and so the sash is drawn on the *right* side of the window
 352         // instead of the left (or bottom instead of top). Correct this.
 353         if ( (short)m_oldX < 0 )
 354             m_oldX = 0;
 355         if ( (short)m_oldY < 0 )
 356             m_oldY = 0;
 357 #endif // __WXMSW__
 358
 359         // Draw new one
 360         if ((GetWindowStyleFlag() & wxSP_LIVE_UPDATE) == 0)
 361         {
 362             DrawSashTracker(m_oldX, m_oldY);
 363         }
 364         else
 365         {
 366             m_sashPosition = new_sash_position;
 367             m_needUpdating = TRUE;
 368         }
 369     }
 370     else if ( event.LeftDClick() )
 371     {
 372         wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
 373                                       this);
 374         eventSplitter.m_data.pt.x = x;
 375         eventSplitter.m_data.pt.y = y;
 376
 377         (void)GetEventHandler()->ProcessEvent(eventSplitter);
 378     }
 379 }
 380
 381 void wxSplitterWindow::OnSize(wxSizeEvent& event)
 382 {
 383     // only process this message if we're not iconized - otherwise iconizing
 384     // and restoring a window containing the splitter has a funny side effect
 385     // of changing the splitter position!
 386     wxWindow *parent = GetParent();
 387     while ( parent && !parent->IsTopLevel() )
 388     {
 389         parent = parent->GetParent();
 390     }
 391
 392     bool iconized = FALSE;
 393     wxFrame *frame = wxDynamicCast(parent, wxFrame);
 394     if ( frame )
 395         iconized = frame->IsIconized();
 396     else
 397     {
 398         wxDialog *dialog = wxDynamicCast(parent, wxDialog);
 399         if ( dialog )
 400             iconized = dialog->IsIconized();
 401         else
 402             wxFAIL_MSG(wxT("should have a top level frame or dialog parent!"));
 403     }
 404
 405     if ( iconized )
 406     {
 407         event.Skip();
 408     }
 409     else
 410     {
 411         int cw, ch;
 412         GetClientSize( &cw, &ch );
 413         if ( m_windowTwo )
 414         {
 415             if ( m_splitMode == wxSPLIT_VERTICAL )
 416             {
 417                 if ( m_sashPosition >= (cw - 5) )
 418                     m_sashPosition = wxMax(10, cw - 40);
 419             }
 420             if ( m_splitMode == wxSPLIT_HORIZONTAL )
 421             {
 422                 if ( m_sashPosition >= (ch - 5) )
 423                     m_sashPosition = wxMax(10, ch - 40);
 424             }
 425         }
 426
 427         SizeWindows();
 428     }
 429 }
 430
 431 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
 432 {
 433     if ( m_windowTwo == NULL || m_sashPosition == 0)
 434         return FALSE; // No sash
 435
 436     if ( m_splitMode == wxSPLIT_VERTICAL )
 437     {
 438         if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
 439             return TRUE;
 440         else
 441             return FALSE;
 442     }
 443     else
 444     {
 445         if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
 446             return TRUE;
 447         else
 448             return FALSE;
 449     }
 450 }
 451
 452 // Draw 3D effect borders
 453 void wxSplitterWindow::DrawBorders(wxDC& dc)
 454 {
 455     int w, h;
 456     GetClientSize(&w, &h);
 457
 458     if ( GetWindowStyleFlag() & wxSP_3D )
 459     {
 460
 461         dc.SetPen(*m_facePen);
 462         dc.SetBrush(*m_faceBrush);
 463         dc.DrawRectangle(1, 1 , w-1, m_borderSize-2 ); //high
 464         dc.DrawRectangle(1, m_borderSize-2 , m_borderSize-2, h-1 ); // left
 465         dc.DrawRectangle(w-m_borderSize+2, m_borderSize-2 , w-1, h-1 ); // right
 466         dc.DrawRectangle(m_borderSize-2, h-m_borderSize+2 , w-m_borderSize+2, h-1 ); //bottom
 467
 468         dc.SetPen(*m_mediumShadowPen);
 469         dc.DrawLine(m_borderSize-2, m_borderSize-2, w-m_borderSize+1, m_borderSize-2);
 470         dc.DrawLine(m_borderSize-2, m_borderSize-2, m_borderSize-2, h-m_borderSize+1);
 471
 472         dc.SetPen(*m_darkShadowPen);
 473         dc.DrawLine(m_borderSize-1, m_borderSize-1, w-m_borderSize, m_borderSize-1);
 474         dc.DrawLine(m_borderSize-1, m_borderSize-1, m_borderSize-1, h-m_borderSize);
 475
 476         dc.SetPen(*m_hilightPen);
 477         dc.DrawLine(m_borderSize - 2, h-m_borderSize+1, w-m_borderSize+1, h-m_borderSize+1);
 478         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.
 479                                      /// Anyway, h is required for MSW.
 480
 481         dc.SetPen(*m_lightShadowPen);
 482         dc.DrawLine(w-m_borderSize, m_borderSize-1, w-m_borderSize, h-m_borderSize); // Right hand side
 483         dc.DrawLine(m_borderSize-1, h-m_borderSize, w-m_borderSize+1, h-m_borderSize);     // Bottom
 484     }
 485     else if ( GetWindowStyleFlag() & wxSP_BORDER )
 486     {
 487         dc.SetBrush(*wxTRANSPARENT_BRUSH);
 488         dc.SetPen(*wxBLACK_PEN);
 489         dc.DrawRectangle(0, 0, w-1, h-1);
 490     }
 491
 492     dc.SetPen(wxNullPen);
 493     dc.SetBrush(wxNullBrush);
 494 }
 495
 496 // Draw the sash
 497 void wxSplitterWindow::DrawSash(wxDC& dc)
 498 {
 499     if ( m_sashPosition == 0 || !m_windowTwo)
 500         return;
 501
 502     int w, h;
 503     GetClientSize(&w, &h);
 504
 505     if ( GetWindowStyleFlag() & wxSP_3D )
 506     {
 507         if ( m_splitMode == wxSPLIT_VERTICAL )
 508         {
 509             dc.SetPen(*m_facePen);
 510             dc.SetBrush(*m_faceBrush);
 511             dc.DrawRectangle(m_sashPosition + 2, 0 , m_sashSize - 4, h );
 512
 513             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 514
 515             dc.SetPen(*m_lightShadowPen);
 516                         int xShadow = m_borderSize ? m_borderSize - 1 : 0 ;
 517             dc.DrawLine(m_sashPosition, xShadow , m_sashPosition, h-m_borderSize);
 518
 519             dc.SetPen(*m_hilightPen);
 520             dc.DrawLine(m_sashPosition+1, m_borderSize - 2, m_sashPosition+1, h - m_borderSize+2);
 521
 522             dc.SetPen(*m_mediumShadowPen);
 523                         int yMedium = m_borderSize ? h-m_borderSize+1 : h ;
 524             dc.DrawLine(m_sashPosition+m_sashSize-2, xShadow, m_sashPosition+m_sashSize-2, yMedium);
 525
 526             dc.SetPen(*m_darkShadowPen);
 527             dc.DrawLine(m_sashPosition+m_sashSize-1, m_borderSize, m_sashPosition+m_sashSize-1, h-m_borderSize );
 528         }
 529         else
 530         {
 531             dc.SetPen(*m_facePen);
 532             dc.SetBrush(*m_faceBrush);
 533             dc.DrawRectangle( m_borderSize-2, m_sashPosition + 2, w-m_borderSize+2, m_sashSize - 4);
 534
 535             dc.SetBrush(*wxTRANSPARENT_BRUSH);
 536
 537             dc.SetPen(*m_lightShadowPen);
 538             dc.DrawLine(m_borderSize-1, m_sashPosition, w-m_borderSize, m_sashPosition);
 539
 540             dc.SetPen(*m_hilightPen);
 541             dc.DrawLine(m_borderSize-2, m_sashPosition+1, w-m_borderSize+1, m_sashPosition+1);
 542
 543             dc.SetPen(*m_mediumShadowPen);
 544             dc.DrawLine(m_borderSize-1, m_sashPosition+m_sashSize-2, w-m_borderSize+1, m_sashPosition+m_sashSize-2);
 545
 546             dc.SetPen(*m_darkShadowPen);
 547             dc.DrawLine(m_borderSize, m_sashPosition+m_sashSize-1, w-m_borderSize, m_sashPosition+m_sashSize-1);
 548         }
 549     }
 550     else
 551     {
 552         if ( m_splitMode == wxSPLIT_VERTICAL )
 553         {
 554             dc.SetPen(*wxBLACK_PEN);
 555             dc.SetBrush(*wxBLACK_BRUSH);
 556             int h1 = h-1;
 557             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 558                 h1 += 1; // Not sure why this is necessary...
 559             dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
 560         }
 561         else
 562         {
 563             dc.SetPen(*wxBLACK_PEN);
 564             dc.SetBrush(*wxBLACK_BRUSH);
 565             int w1 = w-1;
 566             if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
 567                 w1 ++;
 568
 569             dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
 570         }
 571
 572     }
 573
 574     dc.SetPen(wxNullPen);
 575     dc.SetBrush(wxNullBrush);
 576 }
 577
 578 // Draw the sash tracker (for whilst moving the sash)
 579 void wxSplitterWindow::DrawSashTracker(int x, int y)
 580 {
 581     int w, h;
 582     GetClientSize(&w, &h);
 583
 584     wxScreenDC screenDC;
 585     int x1, y1;
 586     int x2, y2;
 587
 588     if ( m_splitMode == wxSPLIT_VERTICAL )
 589     {
 590         x1 = x; y1 = 2;
 591         x2 = x; y2 = h-2;
 592
 593         if ( x1 > w )
 594         {
 595             x1 = w; x2 = w;
 596         }
 597         else if ( x1 < 0 )
 598         {
 599             x1 = 0; x2 = 0;
 600         }
 601     }
 602     else
 603     {
 604         x1 = 2; y1 = y;
 605         x2 = w-2; y2 = y;
 606
 607         if ( y1 > h )
 608         {
 609             y1 = h;
 610             y2 = h;
 611         }
 612         else if ( y1 < 0 )
 613         {
 614             y1 = 0;
 615             y2 = 0;
 616         }
 617     }
 618
 619     ClientToScreen(&x1, &y1);
 620     ClientToScreen(&x2, &y2);
 621
 622     screenDC.SetLogicalFunction(wxINVERT);
 623     screenDC.SetPen(*m_sashTrackerPen);
 624     screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
 625
 626     screenDC.DrawLine(x1, y1, x2, y2);
 627
 628     screenDC.SetLogicalFunction(wxCOPY);
 629
 630     screenDC.SetPen(wxNullPen);
 631     screenDC.SetBrush(wxNullBrush);
 632 }
 633
 634 // Position and size subwindows.
 635 // Note that the border size applies to each subwindow, not
 636 // including the edges next to the sash.
 637 void wxSplitterWindow::SizeWindows()
 638 {
 639     int w, h;
 640     GetClientSize(&w, &h);
 641
 642     if ( m_windowOne && !m_windowTwo )
 643     {
 644         m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);
 645
 646     }
 647     else if ( m_windowOne && m_windowTwo )
 648     {
 649         if (m_splitMode == wxSPLIT_VERTICAL)
 650         {
 651             int x1 = m_borderSize;
 652             int y1 = m_borderSize;
 653             int w1 = m_sashPosition - m_borderSize;
 654             int h1 = h - 2*m_borderSize;
 655
 656             int x2 = m_sashPosition + m_sashSize;
 657             int y2 = m_borderSize;
 658             int w2 = w - 2*m_borderSize - m_sashSize - w1;
 659             int h2 = h - 2*m_borderSize;
 660
 661             m_windowOne->SetSize(x1, y1, w1, h1);
 662             m_windowTwo->SetSize(x2, y2, w2, h2);
 663
 664         }
 665         else
 666         {
 667             m_windowOne->SetSize(m_borderSize, m_borderSize,
 668                 w - 2*m_borderSize, m_sashPosition - m_borderSize);
 669             m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
 670                 w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
 671
 672         }
 673     }
 674     wxClientDC dc(this);
 675     if ( m_borderSize > 0 )
 676         DrawBorders(dc);
 677     DrawSash(dc);
 678 }
 679
 680 // Set pane for unsplit window
 681 void wxSplitterWindow::Initialize(wxWindow *window)
 682 {
 683     m_windowOne = window;
 684     m_windowTwo = (wxWindow *) NULL;
 685     m_sashPosition = 0;
 686 }
 687
 688 // Associates the given window with window 2, drawing the appropriate sash
 689 // and changing the split mode.
 690 // Does nothing and returns FALSE if the window is already split.
 691 bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
 692 {
 693     if ( IsSplit() )
 694         return FALSE;
 695
 696     int w, h;
 697     GetClientSize(&w, &h);
 698
 699     m_splitMode = wxSPLIT_VERTICAL;
 700     m_windowOne = window1;
 701     m_windowTwo = window2;
 702     if ( sashPosition > 0 )
 703         m_sashPosition = sashPosition;
 704     else if ( sashPosition < 0 )
 705         m_sashPosition = w - sashPosition;
 706     else    // default
 707         m_sashPosition = w/2;
 708
 709     SizeWindows();
 710
 711     return TRUE;
 712 }
 713
 714 bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
 715 {
 716     if ( IsSplit() )
 717         return FALSE;
 718
 719     int w, h;
 720     GetClientSize(&w, &h);
 721
 722     m_splitMode = wxSPLIT_HORIZONTAL;
 723     m_windowOne = window1;
 724     m_windowTwo = window2;
 725     if ( sashPosition > 0 )
 726         m_sashPosition = sashPosition;
 727     else if ( sashPosition < 0 )
 728         m_sashPosition = h - sashPosition;
 729     else    // default
 730         m_sashPosition = h/2;
 731
 732     SizeWindows();
 733
 734     return TRUE;
 735 }
 736
 737
 738 // Remove the specified (or second) window from the view
 739 // Doesn't actually delete the window.
 740 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
 741 {
 742     if ( ! IsSplit() )
 743         return FALSE;
 744
 745     wxWindow *win = NULL;
 746     if ( toRemove == NULL || toRemove == m_windowTwo)
 747     {
 748         win = m_windowTwo ;
 749         m_windowTwo = (wxWindow *) NULL;
 750     }
 751     else if ( toRemove == m_windowOne )
 752     {
 753         win = m_windowOne ;
 754         m_windowOne = m_windowTwo;
 755         m_windowTwo = (wxWindow *) NULL;
 756     }
 757     else
 758     {
 759         wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
 760
 761         return FALSE;
 762     }
 763
 764     SendUnsplitEvent(win);
 765     m_sashPosition = 0;
 766     SizeWindows();
 767
 768     return TRUE;
 769 }
 770
 771 // Replace a window with another one
 772 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
 773 {
 774     wxCHECK_MSG( winOld, FALSE, wxT("use one of Split() functions instead") );
 775     wxCHECK_MSG( winNew, FALSE, wxT("use Unsplit() functions instead") );
 776
 777     if ( winOld == m_windowTwo )
 778     {
 779         m_windowTwo = winNew;
 780     }
 781     else if ( winOld == m_windowOne )
 782     {
 783         m_windowOne = winNew;
 784     }
 785     else
 786     {
 787         wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
 788
 789         return FALSE;
 790     }
 791
 792     SizeWindows();
 793
 794     return TRUE;
 795 }
 796
 797 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
 798 {
 799     m_sashPosition = position;
 800
 801     if ( redraw )
 802     {
 803         SizeWindows();
 804     }
 805 }
 806
 807 // Initialize colours
 808 void wxSplitterWindow::InitColours()
 809 {
 810     wxDELETE( m_facePen );
 811     wxDELETE( m_faceBrush );
 812     wxDELETE( m_mediumShadowPen );
 813     wxDELETE( m_darkShadowPen );
 814     wxDELETE( m_lightShadowPen );
 815     wxDELETE( m_hilightPen );
 816
 817     // Shadow colours
 818 #if defined(__WIN95__)
 819     wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 820     m_facePen = new wxPen(faceColour, 1, wxSOLID);
 821     m_faceBrush = new wxBrush(faceColour, wxSOLID);
 822
 823     wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
 824     m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
 825
 826     wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
 827     m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
 828
 829     wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
 830     m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
 831
 832     wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
 833     m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
 834 #else // !Win32
 835     m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
 836     m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
 837     m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
 838     m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
 839     m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
 840     m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
 841 #endif // Win32/!Win32
 842 }
 843
 844 void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
 845 {
 846     wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
 847     event.m_data.win = winRemoved;
 848
 849     (void)GetEventHandler()->ProcessEvent(event);
 850 }
 851
 852 // ---------------------------------------------------------------------------
 853 // splitter event handlers
 854 // ---------------------------------------------------------------------------
 855
 856 void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
 857 {
 858     // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
 859     const int UNSPLIT_THRESHOLD = 4;
 860
 861     int newSashPosition = event.GetSashPosition();
 862
 863     // Obtain relevant window dimension for bottom / right threshold check
 864     int w, h;
 865     GetClientSize(&w, &h);
 866     int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
 867
 868     bool unsplit_scenario = FALSE;
 869     if ( m_permitUnsplitAlways
 870             || m_minimumPaneSize == 0 )
 871     {
 872         // Do edge detection if unsplit premitted
 873         if ( newSashPosition <= UNSPLIT_THRESHOLD )
 874         {
 875             // threshold top / left check
 876             newSashPosition = 0;
 877             unsplit_scenario = TRUE;
 878         }
 879         if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
 880         {
 881             // threshold bottom/right check
 882             newSashPosition = window_size;
 883             unsplit_scenario = TRUE;
 884         }
 885     }
 886
 887     if ( !unsplit_scenario )
 888     {
 889         // If resultant pane would be too small, enlarge it
 890         if ( newSashPosition < m_minimumPaneSize )
 891             newSashPosition = m_minimumPaneSize;
 892         if ( newSashPosition > window_size - m_minimumPaneSize )
 893             newSashPosition = window_size - m_minimumPaneSize;
 894     }
 895
 896     // If the result is out of bounds it means minimum size is too big,
 897     // so split window in half as best compromise.
 898     if ( newSashPosition < 0 || newSashPosition > window_size )
 899         newSashPosition = window_size / 2;
 900
 901     // for compatibility, call the virtual function
 902     if ( !OnSashPositionChange(newSashPosition) )
 903     {
 904         newSashPosition = -1;
 905     }
 906
 907     event.SetSashPosition(newSashPosition);
 908 }
 909
 910 // Called when the sash is double-clicked. The default behaviour is to remove
 911 // the sash if the minimum pane size is zero.
 912 void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
 913 {
 914     // for compatibility, call the virtual function
 915     OnDoubleClickSash(event.GetX(), event.GetY());
 916
 917     if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
 918     {
 919         Unsplit();
 920     }
 921 }
 922
 923 void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 924 {
 925     wxWindow *win = event.GetWindowBeingRemoved();
 926
 927     // do it before calling OnUnsplit() which may delete the window
 928     win->Show(FALSE);
 929
 930     // for compatibility, call the virtual function
 931     OnUnsplit(win);
 932 }