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 SciTech Software, Inc. (www.scitechsoft.com)
   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     // if it is a native window, we assume it handles the scrollbars itself
 486     // too - and if it doesn't, there is not much we can do
 487     if ( !m_renderer )
 488     {
 489         wxWindowNative::DoGetClientSize(width, height);
 490
 491         return;
 492     }
 493
 494     int w, h;
 495     wxWindowNative::DoGetClientSize(&w, &h);
 496
 497     // we assume that the scrollbars are positioned correctly (by a previous
 498     // call to PositionScrollbars()) here
 499
 500     wxRect rectBorder;
 501     if ( m_renderer )
 502         rectBorder = m_renderer->GetBorderDimensions(GetBorder());
 503
 504     bool inside = m_renderer->AreScrollbarsInsideBorder();
 505
 506     if ( width )
 507     {
 508         // in any case, take account of the scrollbar
 509         if ( m_scrollbarVert )
 510             w -= m_scrollbarVert->GetSize().x;
 511
 512         // if we don't have scrollbar or if it is outside the border (and not
 513         // blended into it), take account of the right border as well
 514         if ( !m_scrollbarVert || inside )
 515             w -= rectBorder.width;
 516
 517         // and always account for the left border
 518         *width = w - rectBorder.x;
 519
 520         // we shouldn't return invalid width
 521         if ( *width < 0 )
 522             *width = 0;
 523     }
 524
 525     if ( height )
 526     {
 527         if ( m_scrollbarHorz )
 528             h -= m_scrollbarHorz->GetSize().y;
 529
 530         if ( !m_scrollbarHorz || inside )
 531             h -= rectBorder.height;
 532
 533         *height = h - rectBorder.y;
 534
 535         // we shouldn't return invalid height
 536         if ( *height < 0 )
 537             *height = 0;
 538     }
 539 }
 540
 541 void wxWindow::DoSetClientSize(int width, int height)
 542 {
 543     // take into account the borders
 544     wxRect rectBorder = m_renderer->GetBorderDimensions(GetBorder());
 545     width += rectBorder.x;
 546     height += rectBorder.y;
 547
 548     // and the scrollbars (as they may be offset into the border, use the
 549     // scrollbar position, not size - this supposes that PositionScrollbars()
 550     // had been called before)
 551     bool inside = m_renderer->AreScrollbarsInsideBorder();
 552     wxSize size = GetSize();
 553     if ( m_scrollbarVert )
 554         width += size.x - m_scrollbarVert->GetPosition().x;
 555     if ( !m_scrollbarVert || inside )
 556         width += rectBorder.width;
 557
 558     if ( m_scrollbarHorz )
 559         height += size.y - m_scrollbarHorz->GetPosition().y;
 560     if ( !m_scrollbarHorz || inside )
 561         height += rectBorder.height;
 562
 563     wxWindowNative::DoSetClientSize(width, height);
 564 }
 565
 566 wxHitTest wxWindow::DoHitTest(wxCoord x, wxCoord y) const
 567 {
 568     wxHitTest ht = wxWindowNative::DoHitTest(x, y);
 569     if ( ht == wxHT_WINDOW_INSIDE )
 570     {
 571         if ( m_scrollbarVert && x >= m_scrollbarVert->GetPosition().x )
 572         {
 573             // it can still be changed below because it may also be the corner
 574             ht = wxHT_WINDOW_VERT_SCROLLBAR;
 575         }
 576
 577         if ( m_scrollbarHorz && y >= m_scrollbarHorz->GetPosition().y )
 578         {
 579             ht = ht == wxHT_WINDOW_VERT_SCROLLBAR ? wxHT_WINDOW_CORNER
 580                                                   : wxHT_WINDOW_HORZ_SCROLLBAR;
 581         }
 582     }
 583
 584     return ht;
 585 }
 586
 587 // ----------------------------------------------------------------------------
 588 // scrolling: we implement it entirely ourselves except for ScrollWindow()
 589 // function which is supposed to be (efficiently) implemented by the native
 590 // window class
 591 // ----------------------------------------------------------------------------
 592
 593 void wxWindow::RefreshScrollbars()
 594 {
 595     if ( m_scrollbarHorz )
 596         m_scrollbarHorz->Refresh();
 597
 598     if ( m_scrollbarVert )
 599         m_scrollbarVert->Refresh();
 600 }
 601
 602 void wxWindow::PositionScrollbars()
 603 {
 604     // do not use GetClientSize/Rect as it relies on the scrollbars being
 605     // correctly positioned
 606
 607     wxSize size = GetSize();
 608     wxBorder border = GetBorder();
 609     wxRect rectBorder = m_renderer->GetBorderDimensions(border);
 610     bool inside = m_renderer->AreScrollbarsInsideBorder();
 611
 612     int height = m_scrollbarHorz ? m_scrollbarHorz->GetSize().y : 0;
 613     int width = m_scrollbarVert ? m_scrollbarVert->GetSize().x : 0;
 614
 615     wxRect rectBar;
 616     if ( m_scrollbarVert )
 617     {
 618         rectBar.x = size.x - width;
 619         if ( inside )
 620            rectBar.x -= rectBorder.width;
 621         rectBar.width = width;
 622         rectBar.y = 0;
 623         if ( inside )
 624             rectBar.y += rectBorder.y;
 625         rectBar.height = size.y - height;
 626         if ( inside )
 627             rectBar.height -= rectBorder.y + rectBorder.height;
 628
 629         m_scrollbarVert->SetSize(rectBar, wxSIZE_NO_ADJUSTMENTS);
 630     }
 631
 632     if ( m_scrollbarHorz )
 633     {
 634         rectBar.y = size.y - height;
 635         if ( inside )
 636             rectBar.y -= rectBorder.height;
 637         rectBar.height = height;
 638         rectBar.x = 0;
 639         if ( inside )
 640             rectBar.x += rectBorder.x;
 641         rectBar.width = size.x - width;
 642         if ( inside )
 643             rectBar.width -= rectBorder.x + rectBorder.width;
 644
 645         m_scrollbarHorz->SetSize(rectBar, wxSIZE_NO_ADJUSTMENTS);
 646     }
 647
 648     RefreshScrollbars();
 649 }
 650
 651 void wxWindow::SetScrollbar(int orient,
 652                             int pos,
 653                             int pageSize,
 654                             int range,
 655                             bool refresh)
 656 {
 657     bool hasClientSizeChanged = FALSE;
 658     wxScrollBar *scrollbar = GetScrollbar(orient);
 659     if ( range )
 660     {
 661         if ( !scrollbar )
 662         {
 663             // create it
 664             scrollbar = new wxScrollBar(this, -1,
 665                                         wxDefaultPosition, wxDefaultSize,
 666                                         orient & wxVERTICAL ? wxSB_VERTICAL
 667                                                             : wxSB_HORIZONTAL);
 668             if ( orient & wxVERTICAL )
 669                 m_scrollbarVert = scrollbar;
 670             else
 671                 m_scrollbarHorz = scrollbar;
 672
 673             // the client area diminished as we created a scrollbar
 674             hasClientSizeChanged = TRUE;
 675
 676             PositionScrollbars();
 677         }
 678         else if ( GetWindowStyle() & wxALWAYS_SHOW_SB )
 679         {
 680             // we might have disabled it before
 681             scrollbar->Enable();
 682         }
 683
 684         scrollbar->SetScrollbar(pos, pageSize, range, pageSize, refresh);
 685     }
 686     else // no range means no scrollbar
 687     {
 688         if ( scrollbar )
 689         {
 690             // wxALWAYS_SHOW_SB only applies to the vertical scrollbar
 691             if ( (orient & wxVERTICAL) && (GetWindowStyle() & wxALWAYS_SHOW_SB) )
 692             {
 693                 // just disable the scrollbar
 694                 scrollbar->SetScrollbar(pos, pageSize, range, pageSize, refresh);
 695                 scrollbar->Disable();
 696             }
 697             else // really remove the scrollbar
 698             {
 699                 delete scrollbar;
 700
 701                 if ( orient & wxVERTICAL )
 702                     m_scrollbarVert = NULL;
 703                 else
 704                     m_scrollbarHorz = NULL;
 705
 706                 // the client area increased as we removed a scrollbar
 707                 hasClientSizeChanged = TRUE;
 708
 709                 // the size of the remaining scrollbar must be adjusted
 710                 if ( m_scrollbarHorz || m_scrollbarVert )
 711                 {
 712                     PositionScrollbars();
 713                 }
 714             }
 715         }
 716     }
 717
 718     // give the window a chance to relayout
 719     if ( hasClientSizeChanged )
 720     {
 721         wxSizeEvent event(GetSize());
 722         (void)GetEventHandler()->ProcessEvent(event);
 723     }
 724 }
 725
 726 void wxWindow::SetScrollPos(int orient, int pos, bool refresh)
 727 {
 728     wxScrollBar *scrollbar = GetScrollbar(orient);
 729     wxCHECK_RET( scrollbar, _T("no scrollbar to set position for") );
 730
 731     scrollbar->SetThumbPosition(pos);
 732     if ( refresh )
 733         Refresh();
 734 }
 735
 736 int wxWindow::GetScrollPos(int orient) const
 737 {
 738     wxScrollBar *scrollbar = GetScrollbar(orient);
 739     return scrollbar ? scrollbar->GetThumbPosition() : 0;
 740 }
 741
 742 int wxWindow::GetScrollThumb(int orient) const
 743 {
 744     wxScrollBar *scrollbar = GetScrollbar(orient);
 745     return scrollbar ? scrollbar->GetThumbSize() : 0;
 746 }
 747
 748 int wxWindow::GetScrollRange(int orient) const
 749 {
 750     wxScrollBar *scrollbar = GetScrollbar(orient);
 751     return scrollbar ? scrollbar->GetRange() : 0;
 752 }
 753
 754 void wxWindow::ScrollWindow(int dx, int dy, const wxRect *rect)
 755 {
 756     // before scrolling it, ensure that we don't have any unpainted areas
 757     Update();
 758
 759     wxRect r;
 760
 761     if ( dx )
 762     {
 763         r = ScrollNoRefresh(dx, 0, rect);
 764         Refresh(TRUE /* erase bkgnd */, &r);
 765     }
 766
 767     if ( dy )
 768     {
 769         r = ScrollNoRefresh(0, dy, rect);
 770         Refresh(TRUE /* erase bkgnd */, &r);
 771     }
 772 }
 773
 774 wxRect wxWindow::ScrollNoRefresh(int dx, int dy, const wxRect *rectTotal)
 775 {
 776     wxASSERT_MSG( !dx || !dy, _T("can't be used for diag scrolling") );
 777
 778     // the rect to refresh (which we will calculate)
 779     wxRect rect;
 780
 781     if ( !dx && !dy )
 782     {
 783         // nothing to do
 784         return rect;
 785     }
 786
 787     // calculate the part of the window which we can just redraw in the new
 788     // location
 789     wxSize sizeTotal = rectTotal ? rectTotal->GetSize() : GetClientSize();
 790
 791     wxLogTrace(_T("scroll"), _T("rect is %dx%d, scroll by %d, %d"),
 792                sizeTotal.x, sizeTotal.y, dx, dy);
 793
 794     // the initial and end point of the region we move in client coords
 795     wxPoint ptSource, ptDest;
 796     if ( rectTotal )
 797     {
 798         ptSource = rectTotal->GetPosition();
 799         ptDest = rectTotal->GetPosition();
 800     }
 801
 802     // the size of this region
 803     wxSize size;
 804     size.x = sizeTotal.x - abs(dx);
 805     size.y = sizeTotal.y - abs(dy);
 806     if ( size.x <= 0 || size.y <= 0 )
 807     {
 808         // just redraw everything as nothing of the displayed image will stay
 809         wxLogTrace(_T("scroll"), _T("refreshing everything"));
 810
 811         rect = rectTotal ? *rectTotal : wxRect(0, 0, sizeTotal.x, sizeTotal.y);
 812     }
 813     else // move the part which doesn't change to the new location
 814     {
 815         // note that when we scroll the canvas in some direction we move the
 816         // block which doesn't need to be refreshed in the opposite direction
 817
 818         if ( dx < 0 )
 819         {
 820             // scroll to the right, move to the left
 821             ptSource.x -= dx;
 822         }
 823         else
 824         {
 825             // scroll to the left, move to the right
 826             ptDest.x += dx;
 827         }
 828
 829         if ( dy < 0 )
 830         {
 831             // scroll down, move up
 832             ptSource.y -= dy;
 833         }
 834         else
 835         {
 836             // scroll up, move down
 837             ptDest.y += dy;
 838         }
 839
 840 #if wxUSE_CARET
 841         // we need to hide the caret before moving or it will erase itself at
 842         // the wrong (old) location
 843         wxCaret *caret = GetCaret();
 844         if ( caret )
 845             caret->Hide();
 846 #endif // wxUSE_CARET
 847
 848         // do move
 849         wxClientDC dc(this);
 850         wxBitmap bmp(size.x, size.y);
 851         wxMemoryDC dcMem;
 852         dcMem.SelectObject(bmp);
 853
 854         dcMem.Blit(wxPoint(0, 0), size, &dc, ptSource
 855 #if defined(__WXGTK__) && !defined(__WX_DC_BLIT_FIXED__)
 856                 + GetClientAreaOrigin()
 857 #endif // broken wxGTK wxDC::Blit
 858                   );
 859         dc.Blit(ptDest, size, &dcMem, wxPoint(0, 0));
 860
 861         wxLogTrace(_T("scroll"),
 862                    _T("Blit: (%d, %d) of size %dx%d -> (%d, %d)"),
 863                    ptSource.x, ptSource.y,
 864                    size.x, size.y,
 865                    ptDest.x, ptDest.y);
 866
 867         // and now repaint the uncovered area
 868
 869         // FIXME: We repaint the intersection of these rectangles twice - is
 870         //        it bad? I don't think so as it is rare to scroll the window
 871         //        diagonally anyhow and so adding extra logic to compute
 872         //        rectangle intersection is probably not worth the effort
 873
 874         rect.x = ptSource.x;
 875         rect.y = ptSource.y;
 876
 877         if ( dx )
 878         {
 879             if ( dx < 0 )
 880             {
 881                 // refresh the area along the right border
 882                 rect.x += size.x + dx;
 883                 rect.width = -dx;
 884             }
 885             else
 886             {
 887                 // refresh the area along the left border
 888                 rect.width = dx;
 889             }
 890
 891             rect.height = sizeTotal.y;
 892
 893             wxLogTrace(_T("scroll"), _T("refreshing (%d, %d)-(%d, %d)"),
 894                        rect.x, rect.y,
 895                        rect.GetRight() + 1, rect.GetBottom() + 1);
 896         }
 897
 898         if ( dy )
 899         {
 900             if ( dy < 0 )
 901             {
 902                 // refresh the area along the bottom border
 903                 rect.y += size.y + dy;
 904                 rect.height = -dy;
 905             }
 906             else
 907             {
 908                 // refresh the area along the top border
 909                 rect.height = dy;
 910             }
 911
 912             rect.width = sizeTotal.x;
 913
 914             wxLogTrace(_T("scroll"), _T("refreshing (%d, %d)-(%d, %d)"),
 915                        rect.x, rect.y,
 916                        rect.GetRight() + 1, rect.GetBottom() + 1);
 917         }
 918
 919 #if wxUSE_CARET
 920         if ( caret )
 921             caret->Show();
 922 #endif // wxUSE_CARET
 923     }
 924
 925     return rect;
 926 }
 927
 928 // ----------------------------------------------------------------------------
 929 // colours/fonts
 930 // ----------------------------------------------------------------------------
 931
 932 bool wxWindow::SetBackgroundColour(const wxColour& colour)
 933 {
 934     if ( !wxWindowNative::SetBackgroundColour(colour) )
 935         return FALSE;
 936
 937     m_hasBgCol = TRUE;
 938
 939     return TRUE;
 940 }
 941
 942 bool wxWindow::SetForegroundColour(const wxColour& colour)
 943 {
 944     if ( !wxWindowNative::SetForegroundColour(colour) )
 945         return FALSE;
 946
 947     m_hasFgCol = TRUE;
 948
 949     return TRUE;
 950 }
 951
 952 bool wxWindow::SetFont(const wxFont& font)
 953 {
 954     if ( !wxWindowNative::SetFont(font) )
 955         return FALSE;
 956
 957     m_hasFont = TRUE;
 958
 959     return TRUE;
 960 }
 961
 962 // ----------------------------------------------------------------------------
 963 // mouse capture
 964 // ----------------------------------------------------------------------------
 965
 966 struct WXDLLEXPORT wxWindowNext
 967 {
 968     wxWindow *win;
 969     wxWindowNext *next;
 970 } *wxWindow::ms_winCaptureNext = NULL;
 971
 972 void wxWindow::CaptureMouse()
 973 {
 974     wxWindow *winOld = GetCapture();
 975     if ( winOld )
 976     {
 977         // save it on stack
 978         wxWindowNext *item = new wxWindowNext;
 979         item->win = winOld;
 980         item->next = ms_winCaptureNext;
 981         ms_winCaptureNext = item;
 982     }
 983     //else: no mouse capture to save
 984
 985     wxWindowNative::CaptureMouse();
 986 }
 987
 988 void wxWindow::ReleaseMouse()
 989 {
 990     wxWindowNative::ReleaseMouse();
 991
 992     if ( ms_winCaptureNext )
 993     {
 994         ms_winCaptureNext->win->CaptureMouse();
 995
 996         wxWindowNext *item = ms_winCaptureNext;
 997         ms_winCaptureNext = item->next;
 998         delete item;
 999     }
1000     //else: stack is empty, no previous capture
1001 }
1002
1003 // ----------------------------------------------------------------------------
1004 // accelerators and menu hot keys
1005 // ----------------------------------------------------------------------------
1006
1007 #if wxUSE_MENUS
1008     // the last window over which Alt was pressed (used by OnKeyUp)
1009     wxWindow *wxWindow::ms_winLastAltPress = NULL;
1010 #endif // wxUSE_MENUS
1011
1012 #if wxUSE_ACCEL || wxUSE_MENUS
1013
1014 void wxWindow::OnKeyDown(wxKeyEvent& event)
1015 {
1016 #if wxUSE_MENUS
1017     int key = event.GetKeyCode();
1018     if ( !event.ControlDown() && (key == WXK_MENU || key == WXK_F10) )
1019     {
1020         ms_winLastAltPress = this;
1021
1022         // it can't be an accel anyhow
1023         return;
1024     }
1025
1026     ms_winLastAltPress = NULL;
1027 #endif // wxUSE_MENUS
1028
1029 #if wxUSE_ACCEL
1030     for ( wxWindow *win = this; win; win = win->GetParent() )
1031     {
1032         int command = win->GetAcceleratorTable()->GetCommand(event);
1033         if ( command != -1 )
1034         {
1035             wxCommandEvent eventCmd(wxEVT_COMMAND_MENU_SELECTED, command);
1036             if ( win->GetEventHandler()->ProcessEvent(eventCmd) )
1037             {
1038                 // skip "event.Skip()" below
1039                 return;
1040             }
1041         }
1042
1043         if ( win->IsTopLevel() )
1044         {
1045             // try the frame menu bar
1046 #if wxUSE_MENUS
1047             wxFrame *frame = wxDynamicCast(win, wxFrame);
1048             if ( frame )
1049             {
1050                 wxMenuBar *menubar = frame->GetMenuBar();
1051                 if ( menubar && menubar->ProcessAccelEvent(event) )
1052                 {
1053                     // skip "event.Skip()" below
1054                     return;
1055                 }
1056             }
1057 #endif // wxUSE_MENUS
1058
1059             // don't propagate accels from the child frame to the parent one
1060             break;
1061         }
1062     }
1063 #endif // wxUSE_ACCEL
1064
1065     event.Skip();
1066 }
1067
1068 #endif // wxUSE_ACCEL
1069
1070 #if wxUSE_MENUS
1071
1072 wxMenuBar *wxWindow::GetParentFrameMenuBar() const
1073 {
1074     for ( const wxWindow *win = this; win; win = win->GetParent() )
1075     {
1076         if ( win->IsTopLevel() )
1077         {
1078             wxFrame *frame = wxDynamicCast(win, wxFrame);
1079             if ( frame )
1080             {
1081                 return frame->GetMenuBar();
1082             }
1083
1084             // don't look further - we don't want to return the menubar of the
1085             // parent frame
1086             break;
1087         }
1088     }
1089
1090     return NULL;
1091 }
1092
1093 void wxWindow::OnChar(wxKeyEvent& event)
1094 {
1095     if ( event.AltDown() && !event.ControlDown() )
1096     {
1097         int key = event.GetKeyCode();
1098
1099         wxMenuBar *menubar = GetParentFrameMenuBar();
1100         if ( menubar )
1101         {
1102             int item = menubar->FindNextItemForAccel(-1, key);
1103             if ( item != -1 )
1104             {
1105                 menubar->PopupMenu((size_t)item);
1106
1107                 // skip "event.Skip()" below
1108                 return;
1109             }
1110         }
1111     }
1112
1113     event.Skip();
1114 }
1115
1116 void wxWindow::OnKeyUp(wxKeyEvent& event)
1117 {
1118     int key = event.GetKeyCode();
1119     if ( !event.HasModifiers() && (key == WXK_MENU || key == WXK_F10) )
1120     {
1121         // only process Alt release specially if there were no other key
1122         // presses since Alt had been pressed and if both events happened in
1123         // the same window
1124         if ( ms_winLastAltPress == this )
1125         {
1126             wxMenuBar *menubar = GetParentFrameMenuBar();
1127             if ( menubar && this != menubar )
1128             {
1129                 menubar->SelectMenu(0);
1130             }
1131         }
1132     }
1133     else
1134     {
1135         event.Skip();
1136     }
1137
1138     // in any case reset it
1139     ms_winLastAltPress = NULL;
1140 }
1141
1142 #endif // wxUSE_MENUS
1143