src/univ/winuniv.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        univ/window.cpp
   3 // Purpose:     implementation of extra wxWindow methods for wxUniv port
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     06.08.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "univwindow.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/app.h"
  33     #include "wx/window.h"
  34     #include "wx/dcclient.h"
  35     #include "wx/dcmemory.h"
  36     #include "wx/event.h"
  37     #include "wx/scrolbar.h"
  38     #include "wx/menu.h"
  39     #include "wx/frame.h"
  40 #endif // WX_PRECOMP
  41
  42 #include "wx/univ/colschem.h"
  43 #include "wx/univ/renderer.h"
  44 #include "wx/univ/theme.h"
  45
  46 #if wxUSE_CARET
  47     #include "wx/caret.h"
  48 #endif // wxUSE_CARET
  49
  50 // turn Refresh() debugging on/off
  51 #define WXDEBUG_REFRESH
  52
  53 #ifndef __WXDEBUG__
  54     #undef WXDEBUG_REFRESH
  55 #endif
  56
  57 // ============================================================================
  58 // implementation
  59 // ============================================================================
  60
  61 // ----------------------------------------------------------------------------
  62 // event tables
  63 // ----------------------------------------------------------------------------
  64
  65 // we can't use wxWindowNative here as it won't be expanded inside the macro
  66 #if defined(__WXMSW__)
  67     IMPLEMENT_DYNAMIC_CLASS(wxWindow, wxWindowMSW)
  68 #elif defined(__WXGTK__)
  69     IMPLEMENT_DYNAMIC_CLASS(wxWindow, wxWindowGTK)
  70 #elif defined(__WXMGL__)
  71     IMPLEMENT_DYNAMIC_CLASS(wxWindow, wxWindowMGL)
  72 #endif
  73
  74 BEGIN_EVENT_TABLE(wxWindow, wxWindowNative)
  75     EVT_SIZE(wxWindow::OnSize)
  76
  77 #if wxUSE_ACCEL || wxUSE_MENUS
  78     EVT_KEY_DOWN(wxWindow::OnKeyDown)
  79 #endif // wxUSE_ACCEL
  80
  81 #if wxUSE_MENUS
  82     EVT_CHAR(wxWindow::OnChar)
  83     EVT_KEY_UP(wxWindow::OnKeyUp)
  84 #endif // wxUSE_MENUS
  85
  86     EVT_PAINT(wxWindow::OnPaint)
  87     EVT_NC_PAINT(wxWindow::OnNcPaint)
  88     EVT_ERASE_BACKGROUND(wxWindow::OnErase)
  89 END_EVENT_TABLE()
  90
  91 // ----------------------------------------------------------------------------
  92 // creation
  93 // ----------------------------------------------------------------------------
  94
  95 void wxWindow::Init()
  96 {
  97     m_scrollbarVert =
  98     m_scrollbarHorz = (wxScrollBar *)NULL;
  99
 100     m_isCurrent = FALSE;
 101
 102     m_renderer = wxTheme::Get()->GetRenderer();
 103 }
 104
 105 bool wxWindow::Create(wxWindow *parent,
 106                       wxWindowID id,
 107                       const wxPoint& pos,
 108                       const wxSize& size,
 109                       long style,
 110                       const wxString& name)
 111 {
 112     // we add wxCLIP_CHILDREN and wxNO_FULL_REPAINT_ON_RESIZE because without
 113     // these styles we can't get rid of flicker on wxMSW
 114     if ( !wxWindowNative::Create(parent, id, pos, size,
 115                                  style |
 116                                  wxCLIP_CHILDREN |
 117                                  wxNO_FULL_REPAINT_ON_RESIZE, name) )
 118     {
 119         return FALSE;
 120     }
 121
 122     // if we should always have the scrollbar, do show it
 123     if ( GetWindowStyle() & wxALWAYS_SHOW_SB )
 124     {
 125         m_scrollbarVert = new wxScrollBar(this, -1,
 126                                           wxDefaultPosition, wxDefaultSize,
 127                                           wxSB_VERTICAL);
 128
 129         // and position it
 130         PositionScrollbars();
 131     }
 132
 133     // the colours/fonts are default
 134     m_hasBgCol =
 135     m_hasFgCol =
 136     m_hasFont = FALSE;
 137
 138     return TRUE;
 139 }
 140
 141 // ----------------------------------------------------------------------------
 142 // background pixmap
 143 // ----------------------------------------------------------------------------
 144
 145 void wxWindow::SetBackground(const wxBitmap& bitmap,
 146                               int alignment,
 147                               wxStretch stretch)
 148 {
 149     m_bitmapBg = bitmap;
 150     m_alignBgBitmap = alignment;
 151     m_stretchBgBitmap = stretch;
 152 }
 153
 154 const wxBitmap& wxWindow::GetBackgroundBitmap(int *alignment,
 155                                                wxStretch *stretch) const
 156 {
 157     if ( m_bitmapBg.Ok() )
 158     {
 159         if ( alignment )
 160             *alignment = m_alignBgBitmap;
 161         if ( stretch )
 162             *stretch = m_stretchBgBitmap;
 163     }
 164
 165     return m_bitmapBg;
 166 }
 167
 168 // ----------------------------------------------------------------------------
 169 // painting
 170 // ----------------------------------------------------------------------------
 171
 172 // the event handler executed when the window background must be painted
 173 void wxWindow::OnErase(wxEraseEvent& event)
 174 {
 175     if ( !m_renderer )
 176     {
 177         event.Skip();
 178
 179         return;
 180     }
 181
 182     DoDrawBackground(*event.GetDC());
 183
 184     // if we have both scrollbars, we also have a square in the corner between
 185     // them which we must paint
 186     if ( m_scrollbarVert && m_scrollbarHorz )
 187     {
 188         wxSize size = GetSize();
 189         wxRect rectClient = GetClientRect(),
 190                rectBorder = m_renderer->GetBorderDimensions(GetBorder());
 191
 192         wxRect rectCorner;
 193         rectCorner.x = rectClient.GetRight() + 1;
 194         rectCorner.y = rectClient.GetBottom() + 1;
 195         rectCorner.SetRight(size.x - rectBorder.width);
 196         rectCorner.SetBottom(size.y - rectBorder.height);
 197
 198         if ( GetUpdateRegion().Contains(rectCorner) )
 199         {
 200             m_renderer->DrawScrollCorner(*event.GetDC(), rectCorner);
 201         }
 202     }
 203 }
 204
 205 // the event handlers executed when the window must be repainted
 206 void wxWindow::OnNcPaint(wxPaintEvent& event)
 207 {
 208     if ( m_renderer )
 209     {
 210         // get the window rect
 211         wxRect rect;
 212         wxSize size = GetSize();
 213         rect.x =
 214         rect.y = 0;
 215         rect.width = size.x;
 216         rect.height = size.y;
 217
 218         // if the scrollbars are outside the border, we must adjust the rect to
 219         // exclude them
 220         if ( !m_renderer->AreScrollbarsInsideBorder() )
 221         {
 222             wxScrollBar *scrollbar = GetScrollbar(wxVERTICAL);
 223             if ( scrollbar )
 224                 rect.width -= scrollbar->GetSize().x;
 225
 226             scrollbar = GetScrollbar(wxHORIZONTAL);
 227             if ( scrollbar )
 228                 rect.height -= scrollbar->GetSize().y;
 229         }
 230
 231         // get the DC and draw the border on it
 232         wxWindowDC dc(this);
 233         DoDrawBorder(dc, rect);
 234     }
 235 }
 236
 237 void wxWindow::OnPaint(wxPaintEvent& event)
 238 {
 239     if ( !m_renderer )
 240     {
 241         // it is a native control which paints itself
 242         event.Skip();
 243     }
 244     else
 245     {
 246         // get the DC to use and create renderer on it
 247         wxPaintDC dc(this);
 248         wxControlRenderer renderer(this, dc, m_renderer);
 249
 250         // draw the control
 251         DoDraw(&renderer);
 252     }
 253 }
 254
 255 bool wxWindow::DoDrawBackground(wxDC& dc)
 256 {
 257     // FIXME: leaving this code in leads to partial bg redraws sometimes under
 258     //        MSW
 259     wxRect rect;
 260 #ifndef __WXMSW__
 261     rect = GetUpdateRegion().GetBox();
 262     if ( !rect.width && !rect.height )
 263 #endif
 264     {
 265         wxSize size = GetSize();
 266         rect.width = size.x;
 267         rect.height = size.y;
 268     }
 269
 270     if ( GetBackgroundBitmap().Ok() )
 271     {
 272         // get the bitmap and the flags
 273         int alignment;
 274         wxStretch stretch;
 275         wxBitmap bmp = GetBackgroundBitmap(&alignment, &stretch);
 276         wxControlRenderer::DrawBitmap(dc, bmp, rect, alignment, stretch);
 277     }
 278     else // just fill it with bg colour if no bitmap
 279     {
 280         m_renderer->DrawBackground(dc, wxTHEME_BG_COLOUR(this),
 281                                    rect, GetStateFlags());
 282     }
 283
 284     return TRUE;
 285 }
 286
 287 void wxWindow::EraseBackground(wxDC& dc, const wxRect& rect)
 288 {
 289     // TODO: handle bg bitmaps here!
 290
 291     m_renderer->DrawBackground(dc, wxTHEME_BG_COLOUR(this), rect, GetStateFlags());
 292 }
 293
 294 void wxWindow::DoDrawBorder(wxDC& dc, const wxRect& rect)
 295 {
 296     // draw outline unless the update region is enitrely inside it in which
 297     // case we don't need to do it
 298 #if 0 // doesn't seem to work, why?
 299     if ( wxRegion(rect).Contains(GetUpdateRegion().GetBox()) != wxInRegion )
 300 #endif
 301     {
 302         m_renderer->DrawBorder(dc, GetBorder(), rect, GetStateFlags());
 303     }
 304 }
 305
 306 void wxWindow::DoDraw(wxControlRenderer *renderer)
 307 {
 308 }
 309
 310 void wxWindow::Refresh(bool eraseBackground, const wxRect *rectClient)
 311 {
 312     wxRect rectWin;
 313     wxPoint pt = GetClientAreaOrigin();
 314
 315     wxSize size = GetClientSize();
 316
 317     if ( rectClient )
 318     {
 319         rectWin = *rectClient;
 320
 321         // don't refresh anything beyond the client area (scrollbars for
 322         // example)
 323         if ( rectWin.GetRight() > size.x )
 324             rectWin.SetRight(size.x);
 325         if ( rectWin.GetBottom() > size.y )
 326             rectWin.SetBottom(size.y);
 327
 328         rectWin.Offset(pt);
 329     }
 330     else // refresh the entire client area
 331     {
 332         rectWin.x = pt.x;
 333         rectWin.y = pt.y;
 334         rectWin.width = size.x;
 335         rectWin.height = size.y;
 336     }
 337
 338     // debugging helper
 339 #ifdef WXDEBUG_REFRESH
 340     static bool s_refreshDebug = FALSE;
 341     if ( s_refreshDebug )
 342     {
 343         wxWindowDC dc(this);
 344         dc.SetBrush(*wxCYAN_BRUSH);
 345         dc.SetPen(*wxTRANSPARENT_PEN);
 346         dc.DrawRectangle(rectWin);
 347
 348         // under Unix we use "--sync" X option for this
 349         #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
 350             ::GdiFlush();
 351             ::Sleep(200);
 352         #endif // __WXMSW__
 353     }
 354 #endif // WXDEBUG_REFRESH
 355
 356     wxWindowNative::Refresh(eraseBackground, &rectWin);
 357 }
 358
 359 // ----------------------------------------------------------------------------
 360 // state flags
 361 // ----------------------------------------------------------------------------
 362
 363 bool wxWindow::Enable(bool enable)
 364 {
 365     if ( !wxWindowNative::Enable(enable) )
 366         return FALSE;
 367
 368     // disabled window can't keep focus
 369     if ( FindFocus() == this )
 370     {
 371         GetParent()->SetFocus();
 372     }
 373
 374     if ( m_renderer )
 375     {
 376         // a window with renderer is drawn by ourselves and it has to be
 377         // refreshed to reflect its new status
 378         Refresh();
 379     }
 380
 381     return TRUE;
 382 }
 383
 384 bool wxWindow::IsFocused() const
 385 {
 386     wxWindow *self = wxConstCast(this, wxWindow);
 387     return self->FindFocus() == self;
 388 }
 389
 390 bool wxWindow::IsPressed() const
 391 {
 392     return FALSE;
 393 }
 394
 395 bool wxWindow::IsDefault() const
 396 {
 397     return FALSE;
 398 }
 399
 400 bool wxWindow::IsCurrent() const
 401 {
 402     return m_isCurrent;
 403 }
 404
 405 bool wxWindow::SetCurrent(bool doit)
 406 {
 407     if ( doit == m_isCurrent )
 408         return FALSE;
 409
 410     m_isCurrent = doit;
 411
 412     if ( CanBeHighlighted() )
 413         Refresh();
 414
 415     return TRUE;
 416 }
 417
 418 int wxWindow::GetStateFlags() const
 419 {
 420     int flags = 0;
 421     if ( !IsEnabled() )
 422         flags |= wxCONTROL_DISABLED;
 423
 424     // the following states are only possible if our application is active - if
 425     // it is not, even our default/focused controls shouldn't appear as such
 426     if ( wxTheApp->IsActive() )
 427     {
 428         if ( IsCurrent() )
 429             flags |= wxCONTROL_CURRENT;
 430         if ( IsFocused() )
 431             flags |= wxCONTROL_FOCUSED;
 432         if ( IsPressed() )
 433             flags |= wxCONTROL_PRESSED;
 434         if ( IsDefault() )
 435             flags |= wxCONTROL_ISDEFAULT;
 436     }
 437
 438     return flags;
 439 }
 440
 441 // ----------------------------------------------------------------------------
 442 // size
 443 // ----------------------------------------------------------------------------
 444
 445 void wxWindow::OnSize(wxSizeEvent& event)
 446 {
 447     if ( m_scrollbarVert || m_scrollbarHorz )
 448     {
 449         PositionScrollbars();
 450     }
 451
 452     event.Skip();
 453 }
 454
 455 wxSize wxWindow::DoGetBestSize() const
 456 {
 457     return AdjustSize(DoGetBestClientSize());
 458 }
 459
 460 wxSize wxWindow::DoGetBestClientSize() const
 461 {
 462     return wxWindowNative::DoGetBestSize();
 463 }
 464
 465 wxSize wxWindow::AdjustSize(const wxSize& size) const
 466 {
 467     wxSize sz = size;
 468     if ( m_renderer )
 469         m_renderer->AdjustSize(&sz, this);
 470     return sz;
 471 }
 472
 473 wxPoint wxWindow::GetClientAreaOrigin() const
 474 {
 475     wxPoint pt = wxWindowBase::GetClientAreaOrigin();
 476
 477     if ( m_renderer )
 478         pt += m_renderer->GetBorderDimensions(GetBorder()).GetPosition();
 479
 480     return pt;
 481 }
 482
 483 void wxWindow::DoGetClientSize(int *width, int *height) const
 484 {
 485     int w, h;
 486     wxWindowNative::DoGetClientSize(&w, &h);
 487
 488     // we assume that the scrollbars are positioned correctly (by a previous
 489     // call to PositionScrollbars()) here
 490
 491     wxRect rectBorder;
 492     if ( m_renderer )
 493         rectBorder = m_renderer->GetBorderDimensions(GetBorder());
 494
 495     bool inside = m_renderer->AreScrollbarsInsideBorder();
 496
 497     if ( width )
 498     {
 499         // in any case, take account of the scrollbar
 500         if ( m_scrollbarVert )
 501             w -= m_scrollbarVert->GetSize().x;
 502
 503         // if we don't have scrollbar or if it is outside the border (and not
 504         // blended into it), take account of the right border as well
 505         if ( !m_scrollbarVert || inside )
 506             w -= rectBorder.width;
 507
 508         // and always account for the left border
 509         *width = w - rectBorder.x;
 510
 511         // we shouldn't return invalid width
 512         if ( *width < 0 )
 513             *width = 0;
 514     }
 515
 516     if ( height )
 517     {
 518         if ( m_scrollbarHorz )
 519             h -= m_scrollbarHorz->GetSize().y;
 520
 521         if ( !m_scrollbarHorz || inside )
 522             h -= rectBorder.height;
 523
 524         *height = h - rectBorder.y;
 525
 526         // we shouldn't return invalid height
 527         if ( *height < 0 )
 528             *height = 0;
 529     }
 530 }
 531
 532 void wxWindow::DoSetClientSize(int width, int height)
 533 {
 534     // take into account the borders
 535     wxRect rectBorder = m_renderer->GetBorderDimensions(GetBorder());
 536     width += rectBorder.x;
 537     height += rectBorder.y;
 538
 539     // and the scrollbars (as they may be offset into the border, use the
 540     // scrollbar position, not size - this supposes that PositionScrollbars()
 541     // had been called before)
 542     bool inside = m_renderer->AreScrollbarsInsideBorder();
 543     wxSize size = GetSize();
 544     if ( m_scrollbarVert )
 545         width += size.x - m_scrollbarVert->GetPosition().x;
 546     if ( !m_scrollbarVert || inside )
 547         width += rectBorder.width;
 548
 549     if ( m_scrollbarHorz )
 550         height += size.y - m_scrollbarHorz->GetPosition().y;
 551     if ( !m_scrollbarHorz || inside )
 552         height += rectBorder.height;
 553
 554     wxWindowNative::DoSetClientSize(width, height);
 555 }
 556
 557 wxHitTest wxWindow::DoHitTest(wxCoord x, wxCoord y) const
 558 {
 559     wxHitTest ht = wxWindowNative::DoHitTest(x, y);
 560     if ( ht == wxHT_WINDOW_INSIDE )
 561     {
 562         if ( m_scrollbarVert && x >= m_scrollbarVert->GetPosition().x )
 563         {
 564             // it can still be changed below because it may also be the corner
 565             ht = wxHT_WINDOW_VERT_SCROLLBAR;
 566         }
 567
 568         if ( m_scrollbarHorz && y >= m_scrollbarHorz->GetPosition().y )
 569         {
 570             ht = ht == wxHT_WINDOW_VERT_SCROLLBAR ? wxHT_WINDOW_CORNER
 571                                                   : wxHT_WINDOW_HORZ_SCROLLBAR;
 572         }
 573     }
 574
 575     return ht;
 576 }
 577
 578 // ----------------------------------------------------------------------------
 579 // scrolling: we implement it entirely ourselves except for ScrollWindow()
 580 // function which is supposed to be (efficiently) implemented by the native
 581 // window class
 582 // ----------------------------------------------------------------------------
 583
 584 void wxWindow::RefreshScrollbars()
 585 {
 586     if ( m_scrollbarHorz )
 587         m_scrollbarHorz->Refresh();
 588
 589     if ( m_scrollbarVert )
 590         m_scrollbarVert->Refresh();
 591 }
 592
 593 void wxWindow::PositionScrollbars()
 594 {
 595     // do not use GetClientSize/Rect as it relies on the scrollbars being
 596     // correctly positioned
 597
 598     wxSize size = GetSize();
 599     wxBorder border = GetBorder();
 600     wxRect rectBorder = m_renderer->GetBorderDimensions(border);
 601     bool inside = m_renderer->AreScrollbarsInsideBorder();
 602
 603     int height = m_scrollbarHorz ? m_scrollbarHorz->GetSize().y : 0;
 604     int width = m_scrollbarVert ? m_scrollbarVert->GetSize().x : 0;
 605
 606     wxRect rectBar;
 607     if ( m_scrollbarVert )
 608     {
 609         rectBar.x = size.x - width;
 610         if ( inside )
 611            rectBar.x -= rectBorder.width;
 612         rectBar.width = width;
 613         rectBar.y = 0;
 614         if ( inside )
 615             rectBar.y += rectBorder.y;
 616         rectBar.height = size.y - height;
 617         if ( inside )
 618             rectBar.height -= rectBorder.y + rectBorder.height;
 619
 620         m_scrollbarVert->SetSize(rectBar, wxSIZE_NO_ADJUSTMENTS);
 621     }
 622
 623     if ( m_scrollbarHorz )
 624     {
 625         rectBar.y = size.y - height;
 626         if ( inside )
 627             rectBar.y -= rectBorder.height;
 628         rectBar.height = height;
 629         rectBar.x = 0;
 630         if ( inside )
 631             rectBar.x += rectBorder.x;
 632         rectBar.width = size.x - width;
 633         if ( inside )
 634             rectBar.width -= rectBorder.x + rectBorder.width;
 635
 636         m_scrollbarHorz->SetSize(rectBar, wxSIZE_NO_ADJUSTMENTS);
 637     }
 638
 639     RefreshScrollbars();
 640 }
 641
 642 void wxWindow::SetScrollbar(int orient,
 643                             int pos,
 644                             int pageSize,
 645                             int range,
 646                             bool refresh)
 647 {
 648     bool hasClientSizeChanged = FALSE;
 649     wxScrollBar *scrollbar = GetScrollbar(orient);
 650     if ( range )
 651     {
 652         if ( !scrollbar )
 653         {
 654             // create it
 655             scrollbar = new wxScrollBar(this, -1,
 656                                         wxDefaultPosition, wxDefaultSize,
 657                                         orient & wxVERTICAL ? wxSB_VERTICAL
 658                                                             : wxSB_HORIZONTAL);
 659             if ( orient & wxVERTICAL )
 660                 m_scrollbarVert = scrollbar;
 661             else
 662                 m_scrollbarHorz = scrollbar;
 663
 664             // the client area diminished as we created a scrollbar
 665             hasClientSizeChanged = TRUE;
 666
 667             PositionScrollbars();
 668         }
 669         else if ( GetWindowStyle() & wxALWAYS_SHOW_SB )
 670         {
 671             // we might have disabled it before
 672             scrollbar->Enable();
 673         }
 674
 675         scrollbar->SetScrollbar(pos, pageSize, range, pageSize, refresh);
 676     }
 677     else // no range means no scrollbar
 678     {
 679         if ( scrollbar )
 680         {
 681             // wxALWAYS_SHOW_SB only applies to the vertical scrollbar
 682             if ( (orient & wxVERTICAL) && (GetWindowStyle() & wxALWAYS_SHOW_SB) )
 683             {
 684                 // just disable the scrollbar
 685                 scrollbar->SetScrollbar(pos, pageSize, range, pageSize, refresh);
 686                 scrollbar->Disable();
 687             }
 688             else // really remove the scrollbar
 689             {
 690                 delete scrollbar;
 691
 692                 if ( orient & wxVERTICAL )
 693                     m_scrollbarVert = NULL;
 694                 else
 695                     m_scrollbarHorz = NULL;
 696
 697                 // the client area increased as we removed a scrollbar
 698                 hasClientSizeChanged = TRUE;
 699
 700                 // the size of the remaining scrollbar must be adjusted
 701                 if ( m_scrollbarHorz || m_scrollbarVert )
 702                 {
 703                     PositionScrollbars();
 704                 }
 705             }
 706         }
 707     }
 708
 709     // give the window a chance to relayout
 710     if ( hasClientSizeChanged )
 711     {
 712         wxSizeEvent event(GetSize());
 713         (void)GetEventHandler()->ProcessEvent(event);
 714     }
 715 }
 716
 717 void wxWindow::SetScrollPos(int orient, int pos, bool refresh)
 718 {
 719     wxScrollBar *scrollbar = GetScrollbar(orient);
 720     wxCHECK_RET( scrollbar, _T("no scrollbar to set position for") );
 721
 722     scrollbar->SetThumbPosition(pos);
 723     if ( refresh )
 724         Refresh();
 725 }
 726
 727 int wxWindow::GetScrollPos(int orient) const
 728 {
 729     wxScrollBar *scrollbar = GetScrollbar(orient);
 730     return scrollbar ? scrollbar->GetThumbPosition() : 0;
 731 }
 732
 733 int wxWindow::GetScrollThumb(int orient) const
 734 {
 735     wxScrollBar *scrollbar = GetScrollbar(orient);
 736     return scrollbar ? scrollbar->GetThumbSize() : 0;
 737 }
 738
 739 int wxWindow::GetScrollRange(int orient) const
 740 {
 741     wxScrollBar *scrollbar = GetScrollbar(orient);
 742     return scrollbar ? scrollbar->GetRange() : 0;
 743 }
 744
 745 void wxWindow::ScrollWindow(int dx, int dy, const wxRect *rect)
 746 {
 747     // before scrolling it, ensure that we don't have any unpainted areas
 748     Update();
 749
 750     wxRect r;
 751
 752     if ( dx )
 753     {
 754         r = ScrollNoRefresh(dx, 0, rect);
 755         Refresh(TRUE /* erase bkgnd */, &r);
 756     }
 757
 758     if ( dy )
 759     {
 760         r = ScrollNoRefresh(0, dy, rect);
 761         Refresh(TRUE /* erase bkgnd */, &r);
 762     }
 763 }
 764
 765 wxRect wxWindow::ScrollNoRefresh(int dx, int dy, const wxRect *rectTotal)
 766 {
 767     wxASSERT_MSG( !dx || !dy, _T("can't be used for diag scrolling") );
 768
 769     // the rect to refresh (which we will calculate)
 770     wxRect rect;
 771
 772     if ( !dx && !dy )
 773     {
 774         // nothing to do
 775         return rect;
 776     }
 777
 778     // calculate the part of the window which we can just redraw in the new
 779     // location
 780     wxSize sizeTotal = rectTotal ? rectTotal->GetSize() : GetClientSize();
 781
 782     wxLogTrace(_T("scroll"), _T("rect is %dx%d, scroll by %d, %d"),
 783                sizeTotal.x, sizeTotal.y, dx, dy);
 784
 785     // the initial and end point of the region we move in client coords
 786     wxPoint ptSource, ptDest;
 787     if ( rectTotal )
 788     {
 789         ptSource = rectTotal->GetPosition();
 790         ptDest = rectTotal->GetPosition();
 791     }
 792
 793     // the size of this region
 794     wxSize size;
 795     size.x = sizeTotal.x - abs(dx);
 796     size.y = sizeTotal.y - abs(dy);
 797     if ( size.x <= 0 || size.y <= 0 )
 798     {
 799         // just redraw everything as nothing of the displayed image will stay
 800         wxLogTrace(_T("scroll"), _T("refreshing everything"));
 801
 802         rect = rectTotal ? *rectTotal : wxRect(0, 0, sizeTotal.x, sizeTotal.y);
 803     }
 804     else // move the part which doesn't change to the new location
 805     {
 806         // note that when we scroll the canvas in some direction we move the
 807         // block which doesn't need to be refreshed in the opposite direction
 808
 809         if ( dx < 0 )
 810         {
 811             // scroll to the right, move to the left
 812             ptSource.x -= dx;
 813         }
 814         else
 815         {
 816             // scroll to the left, move to the right
 817             ptDest.x += dx;
 818         }
 819
 820         if ( dy < 0 )
 821         {
 822             // scroll down, move up
 823             ptSource.y -= dy;
 824         }
 825         else
 826         {
 827             // scroll up, move down
 828             ptDest.y += dy;
 829         }
 830
 831 #if wxUSE_CARET
 832         // we need to hide the caret before moving or it will erase itself at
 833         // the wrong (old) location
 834         wxCaret *caret = GetCaret();
 835         if ( caret )
 836             caret->Hide();
 837 #endif // wxUSE_CARET
 838
 839         // do move
 840         wxClientDC dc(this);
 841         wxBitmap bmp(size.x, size.y);
 842         wxMemoryDC dcMem;
 843         dcMem.SelectObject(bmp);
 844
 845         dcMem.Blit(wxPoint(0, 0), size, &dc, ptSource
 846 #if defined(__WXGTK__) && !defined(__WX_DC_BLIT_FIXED__)
 847                 + GetClientAreaOrigin()
 848 #endif // broken wxGTK wxDC::Blit
 849                   );
 850         dc.Blit(ptDest, size, &dcMem, wxPoint(0, 0));
 851
 852         wxLogTrace(_T("scroll"),
 853                    _T("Blit: (%d, %d) of size %dx%d -> (%d, %d)"),
 854                    ptSource.x, ptSource.y,
 855                    size.x, size.y,
 856                    ptDest.x, ptDest.y);
 857
 858         // and now repaint the uncovered area
 859
 860         // FIXME: We repaint the intersection of these rectangles twice - is
 861         //        it bad? I don't think so as it is rare to scroll the window
 862         //        diagonally anyhow and so adding extra logic to compute
 863         //        rectangle intersection is probably not worth the effort
 864
 865         rect.x = ptSource.x;
 866         rect.y = ptSource.y;
 867
 868         if ( dx )
 869         {
 870             if ( dx < 0 )
 871             {
 872                 // refresh the area along the right border
 873                 rect.x += size.x + dx;
 874                 rect.width = -dx;
 875             }
 876             else
 877             {
 878                 // refresh the area along the left border
 879                 rect.width = dx;
 880             }
 881
 882             rect.height = sizeTotal.y;
 883
 884             wxLogTrace(_T("scroll"), _T("refreshing (%d, %d)-(%d, %d)"),
 885                        rect.x, rect.y,
 886                        rect.GetRight() + 1, rect.GetBottom() + 1);
 887         }
 888
 889         if ( dy )
 890         {
 891             if ( dy < 0 )
 892             {
 893                 // refresh the area along the bottom border
 894                 rect.y += size.y + dy;
 895                 rect.height = -dy;
 896             }
 897             else
 898             {
 899                 // refresh the area along the top border
 900                 rect.height = dy;
 901             }
 902
 903             rect.width = sizeTotal.x;
 904
 905             wxLogTrace(_T("scroll"), _T("refreshing (%d, %d)-(%d, %d)"),
 906                        rect.x, rect.y,
 907                        rect.GetRight() + 1, rect.GetBottom() + 1);
 908         }
 909
 910 #if wxUSE_CARET
 911         if ( caret )
 912             caret->Show();
 913 #endif // wxUSE_CARET
 914     }
 915
 916     return rect;
 917 }
 918
 919 // ----------------------------------------------------------------------------
 920 // colours/fonts
 921 // ----------------------------------------------------------------------------
 922
 923 bool wxWindow::SetBackgroundColour(const wxColour& colour)
 924 {
 925     if ( !wxWindowNative::SetBackgroundColour(colour) )
 926         return FALSE;
 927
 928     m_hasBgCol = TRUE;
 929
 930     return TRUE;
 931 }
 932
 933 bool wxWindow::SetForegroundColour(const wxColour& colour)
 934 {
 935     if ( !wxWindowNative::SetForegroundColour(colour) )
 936         return FALSE;
 937
 938     m_hasFgCol = TRUE;
 939
 940     return TRUE;
 941 }
 942
 943 bool wxWindow::SetFont(const wxFont& font)
 944 {
 945     if ( !wxWindowNative::SetFont(font) )
 946         return FALSE;
 947
 948     m_hasFont = TRUE;
 949
 950     return TRUE;
 951 }
 952
 953 // ----------------------------------------------------------------------------
 954 // mouse capture
 955 // ----------------------------------------------------------------------------
 956
 957 struct WXDLLEXPORT wxWindowNext
 958 {
 959     wxWindow *win;
 960     wxWindowNext *next;
 961 } *wxWindow::ms_winCaptureNext = NULL;
 962
 963 void wxWindow::CaptureMouse()
 964 {
 965     wxWindow *winOld = GetCapture();
 966     if ( winOld )
 967     {
 968         // save it on stack
 969         wxWindowNext *item = new wxWindowNext;
 970         item->win = winOld;
 971         item->next = ms_winCaptureNext;
 972         ms_winCaptureNext = item;
 973     }
 974     //else: no mouse capture to save
 975
 976     wxWindowNative::CaptureMouse();
 977 }
 978
 979 void wxWindow::ReleaseMouse()
 980 {
 981     wxWindowNative::ReleaseMouse();
 982
 983     if ( ms_winCaptureNext )
 984     {
 985         ms_winCaptureNext->win->CaptureMouse();
 986
 987         wxWindowNext *item = ms_winCaptureNext;
 988         ms_winCaptureNext = item->next;
 989         delete item;
 990     }
 991     //else: stack is empty, no previous capture
 992 }
 993
 994 // ----------------------------------------------------------------------------
 995 // accelerators and menu hot keys
 996 // ----------------------------------------------------------------------------
 997
 998 #if wxUSE_MENUS
 999     // the last window over which Alt was pressed (used by OnKeyUp)
1000     wxWindow *wxWindow::ms_winLastAltPress = NULL;
1001 #endif // wxUSE_MENUS
1002
1003 #if wxUSE_ACCEL || wxUSE_MENUS
1004
1005 void wxWindow::OnKeyDown(wxKeyEvent& event)
1006 {
1007 #if wxUSE_MENUS
1008     int key = event.GetKeyCode();
1009     if ( !event.ControlDown() && (key == WXK_MENU || key == WXK_F10) )
1010     {
1011         ms_winLastAltPress = this;
1012
1013         // it can't be an accel anyhow
1014         return;
1015     }
1016
1017     ms_winLastAltPress = NULL;
1018 #endif // wxUSE_MENUS
1019
1020 #if wxUSE_ACCEL
1021     for ( wxWindow *win = this; win; win = win->GetParent() )
1022     {
1023         int command = win->GetAcceleratorTable()->GetCommand(event);
1024         if ( command != -1 )
1025         {
1026             wxCommandEvent eventCmd(wxEVT_COMMAND_MENU_SELECTED, command);
1027             if ( win->GetEventHandler()->ProcessEvent(eventCmd) )
1028             {
1029                 // skip "event.Skip()" below
1030                 return;
1031             }
1032         }
1033
1034         if ( win->IsTopLevel() )
1035         {
1036             // try the frame menu bar
1037 #if wxUSE_MENUS
1038             wxFrame *frame = wxDynamicCast(win, wxFrame);
1039             if ( frame )
1040             {
1041                 wxMenuBar *menubar = frame->GetMenuBar();
1042                 if ( menubar && menubar->ProcessAccelEvent(event) )
1043                 {
1044                     // skip "event.Skip()" below
1045                     return;
1046                 }
1047             }
1048 #endif // wxUSE_MENUS
1049
1050             // don't propagate accels from the child frame to the parent one
1051             break;
1052         }
1053     }
1054 #endif // wxUSE_ACCEL
1055
1056     event.Skip();
1057 }
1058
1059 #endif // wxUSE_ACCEL
1060
1061 #if wxUSE_MENUS
1062
1063 wxMenuBar *wxWindow::GetParentFrameMenuBar() const
1064 {
1065     for ( const wxWindow *win = this; win; win = win->GetParent() )
1066     {
1067         if ( win->IsTopLevel() )
1068         {
1069             wxFrame *frame = wxDynamicCast(win, wxFrame);
1070             if ( frame )
1071             {
1072                 return frame->GetMenuBar();
1073             }
1074
1075             // don't look further - we don't want to return the menubar of the
1076             // parent frame
1077             break;
1078         }
1079     }
1080
1081     return NULL;
1082 }
1083
1084 void wxWindow::OnChar(wxKeyEvent& event)
1085 {
1086     if ( event.AltDown() && !event.ControlDown() )
1087     {
1088         int key = event.GetKeyCode();
1089
1090         wxMenuBar *menubar = GetParentFrameMenuBar();
1091         if ( menubar )
1092         {
1093             int item = menubar->FindNextItemForAccel(-1, key);
1094             if ( item != -1 )
1095             {
1096                 menubar->PopupMenu((size_t)item);
1097
1098                 // skip "event.Skip()" below
1099                 return;
1100             }
1101         }
1102     }
1103
1104     event.Skip();
1105 }
1106
1107 void wxWindow::OnKeyUp(wxKeyEvent& event)
1108 {
1109     int key = event.GetKeyCode();
1110     if ( !event.HasModifiers() && (key == WXK_MENU || key == WXK_F10) )
1111     {
1112         // only process Alt release specially if there were no other key
1113         // presses since Alt had been pressed and if both events happened in
1114         // the same window
1115         if ( ms_winLastAltPress == this )
1116         {
1117             wxMenuBar *menubar = GetParentFrameMenuBar();
1118             if ( menubar && this != menubar )
1119             {
1120                 menubar->SelectMenu(0);
1121             }
1122         }
1123     }
1124     else
1125     {
1126         event.Skip();
1127     }
1128
1129     // in any case reset it
1130     ms_winLastAltPress = NULL;
1131 }
1132
1133 #endif // wxUSE_MENUS
1134