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