src/univ/renderer.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        univ/renderer.cpp
   3 // Purpose:     wxControlRenderer implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     15.08.00
   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 "renderer.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/control.h"
  34     #include "wx/checklst.h"
  35     #include "wx/listbox.h"
  36     #include "wx/scrolbar.h"
  37     #include "wx/dc.h"
  38 #endif // WX_PRECOMP
  39
  40 #include "wx/image.h"
  41
  42 #include "wx/univ/theme.h"
  43 #include "wx/univ/renderer.h"
  44 #include "wx/univ/colschem.h"
  45
  46 // ============================================================================
  47 // implementation
  48 // ============================================================================
  49
  50 // ----------------------------------------------------------------------------
  51 // wxRenderer: drawing helpers
  52 // ----------------------------------------------------------------------------
  53
  54 void wxRenderer::StandardDrawFrame(wxDC& dc,
  55                                    const wxRect& rectFrame,
  56                                    const wxRect& rectLabel)
  57 {
  58     // draw left, bottom and right lines entirely
  59     DrawVerticalLine(dc, rectFrame.GetLeft(),
  60                      rectFrame.GetTop(), rectFrame.GetBottom() - 2);
  61     DrawHorizontalLine(dc, rectFrame.GetBottom() - 1,
  62                        rectFrame.GetLeft(), rectFrame.GetRight());
  63     DrawVerticalLine(dc, rectFrame.GetRight() - 1,
  64                      rectFrame.GetTop(), rectFrame.GetBottom() - 1);
  65
  66     // and 2 parts of the top line
  67     DrawHorizontalLine(dc, rectFrame.GetTop(),
  68                        rectFrame.GetLeft() + 1, rectLabel.GetLeft());
  69     DrawHorizontalLine(dc, rectFrame.GetTop(),
  70                        rectLabel.GetRight(), rectFrame.GetRight() - 2);
  71 }
  72
  73 /* static */
  74 void wxRenderer::StandardDrawTextLine(wxDC& dc,
  75                                       const wxString& text,
  76                                       const wxRect& rect,
  77                                       int selStart, int selEnd,
  78                                       int flags)
  79 {
  80     if ( (selStart == -1) || !(flags & wxCONTROL_FOCUSED) )
  81     {
  82         // just draw it as is
  83         dc.DrawText(text, rect.x, rect.y);
  84     }
  85     else // we have selection
  86     {
  87         wxCoord width,
  88                 x = rect.x;
  89
  90         // draw the part before selection
  91         wxString s(text, (size_t)selStart);
  92         if ( !s.empty() )
  93         {
  94             dc.DrawText(s, x, rect.y);
  95
  96             dc.GetTextExtent(s, &width, NULL);
  97             x += width;
  98         }
  99
 100         // draw the selection itself
 101         s = wxString(text.c_str() + selStart, text.c_str() + selEnd);
 102         if ( !s.empty() )
 103         {
 104             wxColour colFg = dc.GetTextForeground(),
 105                      colBg = dc.GetTextBackground();
 106             dc.SetTextForeground(wxTHEME_COLOUR(HIGHLIGHT_TEXT));
 107             dc.SetTextBackground(wxTHEME_COLOUR(HIGHLIGHT));
 108             dc.SetBackgroundMode(wxSOLID);
 109
 110             dc.DrawText(s, x, rect.y);
 111             dc.GetTextExtent(s, &width, NULL);
 112             x += width;
 113
 114             dc.SetBackgroundMode(wxTRANSPARENT);
 115             dc.SetTextBackground(colBg);
 116             dc.SetTextForeground(colFg);
 117         }
 118
 119         // draw the final part
 120         s = text.c_str() + selEnd;
 121         if ( !s.empty() )
 122         {
 123             dc.DrawText(s, x, rect.y);
 124         }
 125     }
 126 }
 127
 128 // ----------------------------------------------------------------------------
 129 // wxRenderer: scrollbar geometry
 130 // ----------------------------------------------------------------------------
 131
 132 /* static */
 133 void wxRenderer::StandardScrollBarThumbSize(wxCoord length,
 134                                             int thumbPos,
 135                                             int thumbSize,
 136                                             int range,
 137                                             wxCoord *thumbStart,
 138                                             wxCoord *thumbEnd)
 139 {
 140     // the thumb can't be made less than this number of pixels
 141     static const wxCoord thumbMinWidth = 8; // FIXME: should be configurable
 142
 143     *thumbStart = (length*thumbPos) / range;
 144     *thumbEnd = (length*(thumbPos + thumbSize)) / range;
 145
 146     if ( *thumbEnd - *thumbStart < thumbMinWidth )
 147     {
 148         // adjust the end if possible
 149         if ( *thumbStart <= length - thumbMinWidth )
 150         {
 151             // yes, just make it wider
 152             *thumbEnd = *thumbStart + thumbMinWidth;
 153         }
 154         else // it is at the bottom of the scrollbar
 155         {
 156             // so move it a bit up
 157             *thumbStart = length - thumbMinWidth;
 158             *thumbEnd = length;
 159         }
 160     }
 161 }
 162
 163 /* static */
 164 wxRect wxRenderer::StandardGetScrollbarRect(const wxScrollBar *scrollbar,
 165                                             wxScrollBar::Element elem,
 166                                             int thumbPos,
 167                                             const wxSize& sizeArrow)
 168 {
 169     if ( thumbPos == -1 )
 170     {
 171         thumbPos = scrollbar->GetThumbPosition();
 172     }
 173
 174     wxSize sizeTotal = scrollbar->GetClientSize();
 175     wxCoord *start, *width, length, arrow;
 176     wxRect rect;
 177     if ( scrollbar->IsVertical() )
 178     {
 179         rect.x = 0;
 180         rect.width = sizeTotal.x;
 181         length = sizeTotal.y;
 182         start = &rect.y;
 183         width = &rect.height;
 184         arrow = sizeArrow.y;
 185     }
 186     else // horizontal
 187     {
 188         rect.y = 0;
 189         rect.height = sizeTotal.y;
 190         length = sizeTotal.x;
 191         start = &rect.x;
 192         width = &rect.width;
 193         arrow = sizeArrow.x;
 194     }
 195
 196     switch ( elem )
 197     {
 198         case wxScrollBar::Element_Arrow_Line_1:
 199             *start = 0;
 200             *width = arrow;
 201             break;
 202
 203         case wxScrollBar::Element_Arrow_Line_2:
 204             *start = length - arrow;
 205             *width = arrow;
 206             break;
 207
 208         case wxScrollBar::Element_Arrow_Page_1:
 209         case wxScrollBar::Element_Arrow_Page_2:
 210             // we don't have them at all
 211             break;
 212
 213         case wxScrollBar::Element_Thumb:
 214         case wxScrollBar::Element_Bar_1:
 215         case wxScrollBar::Element_Bar_2:
 216             // we need to calculate the thumb position - do it
 217             {
 218                 length -= 2*arrow;
 219                 wxCoord thumbStart, thumbEnd;
 220                 int range = scrollbar->GetRange();
 221                 if ( !range )
 222                 {
 223                     thumbStart =
 224                     thumbEnd = 0;
 225                 }
 226                 else
 227                 {
 228                     StandardScrollBarThumbSize(length,
 229                                                thumbPos,
 230                                                scrollbar->GetThumbSize(),
 231                                                range,
 232                                                &thumbStart,
 233                                                &thumbEnd);
 234                 }
 235
 236                 if ( elem == wxScrollBar::Element_Thumb )
 237                 {
 238                     *start = thumbStart;
 239                     *width = thumbEnd - thumbStart;
 240                 }
 241                 else if ( elem == wxScrollBar::Element_Bar_1 )
 242                 {
 243                     *start = 0;
 244                     *width = thumbStart;
 245                 }
 246                 else // elem == wxScrollBar::Element_Bar_2
 247                 {
 248                     *start = thumbEnd;
 249                     *width = length - thumbEnd;
 250                 }
 251
 252                 // everything is relative to the start of the shaft so far
 253                 *start += arrow;
 254             }
 255             break;
 256
 257         case wxScrollBar::Element_Max:
 258         default:
 259             wxFAIL_MSG( _T("unknown scrollbar element") );
 260     }
 261
 262     return rect;
 263 }
 264
 265 /* static */
 266 wxCoord wxRenderer::StandardScrollBarSize(const wxScrollBar *scrollbar,
 267                                           const wxSize& sizeArrowSB)
 268 {
 269     wxCoord sizeArrow, sizeTotal;
 270     if ( scrollbar->GetWindowStyle() & wxVERTICAL )
 271     {
 272         sizeArrow = sizeArrowSB.y;
 273         sizeTotal = scrollbar->GetSize().y;
 274     }
 275     else // horizontal
 276     {
 277         sizeArrow = sizeArrowSB.x;
 278         sizeTotal = scrollbar->GetSize().x;
 279     }
 280
 281     return sizeTotal - 2*sizeArrow;
 282 }
 283
 284 /* static */
 285 wxCoord wxRenderer::StandardScrollbarToPixel(const wxScrollBar *scrollbar,
 286                                              int thumbPos,
 287                                              const wxSize& sizeArrow)
 288 {
 289     int range = scrollbar->GetRange();
 290     if ( !range )
 291     {
 292         // the only valid position anyhow
 293         return 0;
 294     }
 295
 296     if ( thumbPos == -1 )
 297     {
 298         // by default use the current thumb position
 299         thumbPos = scrollbar->GetThumbPosition();
 300     }
 301
 302     return ( thumbPos*StandardScrollBarSize(scrollbar, sizeArrow) ) / range
 303              + (scrollbar->IsVertical() ? sizeArrow.y : sizeArrow.x);
 304 }
 305
 306 /* static */
 307 int wxRenderer::StandardPixelToScrollbar(const wxScrollBar *scrollbar,
 308                                          wxCoord coord,
 309                                          const wxSize& sizeArrow)
 310 {
 311     return ( (coord - (scrollbar->IsVertical() ? sizeArrow.y : sizeArrow.x)) *
 312                scrollbar->GetRange() ) /
 313                StandardScrollBarSize(scrollbar, sizeArrow);
 314 }
 315
 316 /* static */
 317 wxHitTest wxRenderer::StandardHitTestScrollbar(const wxScrollBar *scrollbar,
 318                                                const wxPoint& pt,
 319                                                const wxSize& sizeArrowSB)
 320 {
 321     // we only need to work with either x or y coord depending on the
 322     // orientation, choose one (but still check the other one to verify if the
 323     // mouse is in the window at all)
 324     wxCoord coord, sizeArrow, sizeTotal;
 325     wxSize size = scrollbar->GetSize();
 326     if ( scrollbar->GetWindowStyle() & wxVERTICAL )
 327     {
 328         if ( pt.x < 0 || pt.x > size.x )
 329             return wxHT_NOWHERE;
 330
 331         coord = pt.y;
 332         sizeArrow = sizeArrowSB.y;
 333         sizeTotal = size.y;
 334     }
 335     else // horizontal
 336     {
 337         if ( pt.y < 0 || pt.y > size.y )
 338             return wxHT_NOWHERE;
 339
 340         coord = pt.x;
 341         sizeArrow = sizeArrowSB.x;
 342         sizeTotal = size.x;
 343     }
 344
 345     // test for the arrows first as it's faster
 346     if ( coord < 0 || coord > sizeTotal )
 347     {
 348         return wxHT_NOWHERE;
 349     }
 350     else if ( coord < sizeArrow )
 351     {
 352         return wxHT_SCROLLBAR_ARROW_LINE_1;
 353     }
 354     else if ( coord > sizeTotal - sizeArrow )
 355     {
 356         return wxHT_SCROLLBAR_ARROW_LINE_2;
 357     }
 358     else
 359     {
 360         // calculate the thumb position in pixels
 361         sizeTotal -= 2*sizeArrow;
 362         wxCoord thumbStart, thumbEnd;
 363         int range = scrollbar->GetRange();
 364         if ( !range )
 365         {
 366             // clicking the scrollbar without range has no effect
 367             return wxHT_NOWHERE;
 368         }
 369         else
 370         {
 371             StandardScrollBarThumbSize(sizeTotal,
 372                                        scrollbar->GetThumbPosition(),
 373                                        scrollbar->GetThumbSize(),
 374                                        range,
 375                                        &thumbStart,
 376                                        &thumbEnd);
 377         }
 378
 379         // now compare with the thumb position
 380         coord -= sizeArrow;
 381         if ( coord < thumbStart )
 382             return wxHT_SCROLLBAR_BAR_1;
 383         else if ( coord > thumbEnd )
 384             return wxHT_SCROLLBAR_BAR_2;
 385         else
 386             return wxHT_SCROLLBAR_THUMB;
 387     }
 388 }
 389
 390 wxRenderer::~wxRenderer()
 391 {
 392 }
 393
 394 // ----------------------------------------------------------------------------
 395 // wxControlRenderer
 396 // ----------------------------------------------------------------------------
 397
 398 wxControlRenderer::wxControlRenderer(wxWindow *window,
 399                                      wxDC& dc,
 400                                      wxRenderer *renderer)
 401                 : m_dc(dc)
 402 {
 403     m_window = window;
 404     m_renderer = renderer;
 405
 406     wxSize size = m_window->GetClientSize();
 407     m_rect.x =
 408     m_rect.y = 0;
 409     m_rect.width = size.x;
 410     m_rect.height = size.y;
 411 }
 412
 413 void wxControlRenderer::DrawLabel(const wxBitmap& bitmap,
 414                                   wxCoord marginX, wxCoord marginY)
 415 {
 416     m_dc.SetFont(m_window->GetFont());
 417     m_dc.SetTextForeground(m_window->GetForegroundColour());
 418
 419     wxString label = m_window->GetLabel();
 420     if ( !label.empty() || bitmap.Ok() )
 421     {
 422         wxRect rectLabel = m_rect;
 423         if ( bitmap.Ok() )
 424         {
 425             rectLabel.Inflate(-marginX, -marginY);
 426         }
 427
 428         wxControl *ctrl = wxStaticCast(m_window, wxControl);
 429
 430         m_renderer->DrawButtonLabel(m_dc,
 431                                     label,
 432                                     bitmap,
 433                                     rectLabel,
 434                                     m_window->GetStateFlags(),
 435                                     ctrl->GetAlignment(),
 436                                     ctrl->GetAccelIndex());
 437     }
 438 }
 439
 440 void wxControlRenderer::DrawFrame()
 441 {
 442     m_dc.SetFont(m_window->GetFont());
 443     m_dc.SetTextForeground(m_window->GetForegroundColour());
 444     m_dc.SetTextBackground(m_window->GetBackgroundColour());
 445
 446     wxControl *ctrl = wxStaticCast(m_window, wxControl);
 447
 448     m_renderer->DrawFrame(m_dc,
 449                           m_window->GetLabel(),
 450                           m_rect,
 451                           m_window->GetStateFlags(),
 452                           ctrl->GetAlignment(),
 453                           ctrl->GetAccelIndex());
 454 }
 455
 456 void wxControlRenderer::DrawButtonBorder()
 457 {
 458     int flags = m_window->GetStateFlags();
 459
 460     m_renderer->DrawButtonBorder(m_dc, m_rect, flags, &m_rect);
 461
 462     m_renderer->DrawBackground(m_dc, wxTHEME_BG_COLOUR(m_window), m_rect, flags);
 463 }
 464
 465 void wxControlRenderer::DrawBitmap(const wxBitmap& bitmap)
 466 {
 467     int style = m_window->GetWindowStyle();
 468     DrawBitmap(m_dc, bitmap, m_rect,
 469                style & wxALIGN_MASK,
 470                style & wxBI_EXPAND ? wxEXPAND : wxSTRETCH_NOT);
 471 }
 472
 473 /* static */
 474 void wxControlRenderer::DrawBitmap(wxDC &dc,
 475                                    const wxBitmap& bitmap,
 476                                    const wxRect& rect,
 477                                    int alignment,
 478                                    wxStretch stretch)
 479 {
 480     // we may change the bitmap if we stretch it
 481     wxBitmap bmp = bitmap;
 482     if ( !bmp.Ok() )
 483         return;
 484
 485     int width = bmp.GetWidth(),
 486         height = bmp.GetHeight();
 487
 488     wxCoord x = 0,
 489             y = 0;
 490     if ( stretch & wxTILE )
 491     {
 492         // tile the bitmap
 493         for ( ; x < rect.width; x += width )
 494         {
 495             for ( y = 0; y < rect.height; y += height )
 496             {
 497                 // no need to use mask here as we cover the entire window area
 498                 dc.DrawBitmap(bmp, x, y);
 499             }
 500         }
 501     }
 502     else if ( stretch & wxEXPAND )
 503     {
 504         // stretch bitmap to fill the entire control
 505         bmp = wxImage(bmp).Scale(rect.width, rect.height).ConvertToBitmap();
 506     }
 507     else // not stretched, not tiled
 508     {
 509         if ( alignment & wxALIGN_RIGHT )
 510         {
 511             x = rect.GetRight() - width;
 512         }
 513         else if ( alignment & wxALIGN_CENTRE )
 514         {
 515             x = (rect.GetLeft() + rect.GetRight() - width + 1) / 2;
 516         }
 517         else // alignment & wxALIGN_LEFT
 518         {
 519             x = rect.GetLeft();
 520         }
 521
 522         if ( alignment & wxALIGN_BOTTOM )
 523         {
 524             y = rect.GetBottom() - height;
 525         }
 526         else if ( alignment & wxALIGN_CENTRE_VERTICAL )
 527         {
 528             y = (rect.GetTop() + rect.GetBottom() - height + 1) / 2;
 529         }
 530         else // alignment & wxALIGN_TOP
 531         {
 532             y = rect.GetTop();
 533         }
 534     }
 535
 536     // do draw it
 537     dc.DrawBitmap(bmp, x, y, TRUE /* use mask */);
 538 }
 539
 540 void wxControlRenderer::DrawScrollbar(const wxScrollBar *scrollbar,
 541                                       int thumbPosOld)
 542 {
 543     // we will only redraw the parts which must be redrawn and not everything
 544     wxRegion rgnUpdate = scrollbar->GetUpdateRegion();
 545
 546     {
 547         wxRect rectUpdate = rgnUpdate.GetBox();
 548         wxLogTrace(_T("scrollbar"),
 549                    _T("%s redraw: update box is (%d, %d)-(%d, %d)"),
 550                    scrollbar->IsVertical() ? _T("vert") : _T("horz"),
 551                    rectUpdate.GetLeft(),
 552                    rectUpdate.GetTop(),
 553                    rectUpdate.GetRight(),
 554                    rectUpdate.GetBottom());
 555
 556 #if 0 //def WXDEBUG_SCROLLBAR
 557         static bool s_refreshDebug = FALSE;
 558         if ( s_refreshDebug )
 559         {
 560             wxClientDC dc(wxConstCast(scrollbar, wxScrollBar));
 561             dc.SetBrush(*wxRED_BRUSH);
 562             dc.SetPen(*wxTRANSPARENT_PEN);
 563             dc.DrawRectangle(rectUpdate);
 564
 565             // under Unix we use "--sync" X option for this
 566             #ifdef __WXMSW__
 567                 ::GdiFlush();
 568                 ::Sleep(200);
 569             #endif // __WXMSW__
 570         }
 571 #endif // WXDEBUG_SCROLLBAR
 572     }
 573
 574     wxOrientation orient = scrollbar->IsVertical() ? wxVERTICAL
 575                                                    : wxHORIZONTAL;
 576
 577     // the shaft
 578     for ( int nBar = 0; nBar < 2; nBar++ )
 579     {
 580         wxScrollBar::Element elem =
 581             (wxScrollBar::Element)(wxScrollBar::Element_Bar_1 + nBar);
 582
 583         wxRect rectBar = m_renderer->GetScrollbarRect(scrollbar, elem);
 584
 585         if ( rgnUpdate.Contains(rectBar) )
 586         {
 587             wxLogTrace(_T("scrollbar"),
 588                        _T("drawing bar part %d at (%d, %d)-(%d, %d)"),
 589                        nBar + 1,
 590                        rectBar.GetLeft(),
 591                        rectBar.GetTop(),
 592                        rectBar.GetRight(),
 593                        rectBar.GetBottom());
 594
 595             m_renderer->DrawScrollbarShaft(m_dc,
 596                                            orient,
 597                                            rectBar,
 598                                            scrollbar->GetState(elem));
 599         }
 600     }
 601
 602     // arrows
 603     for ( int nArrow = 0; nArrow < 2; nArrow++ )
 604     {
 605         wxScrollBar::Element elem =
 606             (wxScrollBar::Element)(wxScrollBar::Element_Arrow_Line_1 + nArrow);
 607
 608         wxRect rectArrow = m_renderer->GetScrollbarRect(scrollbar, elem);
 609         if ( rgnUpdate.Contains(rectArrow) )
 610         {
 611             wxLogTrace(_T("scrollbar"),
 612                        _T("drawing arrow %d at (%d, %d)-(%d, %d)"),
 613                        nArrow + 1,
 614                        rectArrow.GetLeft(),
 615                        rectArrow.GetTop(),
 616                        rectArrow.GetRight(),
 617                        rectArrow.GetBottom());
 618
 619             scrollbar->GetArrows().DrawArrow
 620             (
 621                 (wxScrollArrows::Arrow)nArrow,
 622                 m_dc,
 623                 rectArrow,
 624                 TRUE // draw a scrollbar arrow, not just an arrow
 625             );
 626         }
 627     }
 628
 629     // TODO: support for page arrows
 630
 631     // and the thumb
 632     wxScrollBar::Element elem = wxScrollBar::Element_Thumb;
 633     wxRect rectThumb = m_renderer->GetScrollbarRect(scrollbar, elem);
 634     if ( rectThumb.width && rectThumb.height && rgnUpdate.Contains(rectThumb) )
 635     {
 636         wxLogTrace(_T("scrollbar"),
 637                    _T("drawing thumb at (%d, %d)-(%d, %d)"),
 638                    rectThumb.GetLeft(),
 639                    rectThumb.GetTop(),
 640                    rectThumb.GetRight(),
 641                    rectThumb.GetBottom());
 642
 643         m_renderer->DrawScrollbarThumb(m_dc,
 644                                        orient,
 645                                        rectThumb,
 646                                        scrollbar->GetState(elem));
 647     }
 648 }
 649
 650 void wxControlRenderer::DrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 651 {
 652     wxASSERT_MSG( x1 == x2 || y1 == y2,
 653                   _T("line must be either horizontal or vertical") );
 654
 655     if ( x1 == x2 )
 656         m_renderer->DrawVerticalLine(m_dc, x1, y1, y2);
 657     else // horizontal
 658         m_renderer->DrawHorizontalLine(m_dc, y1, x1, x2);
 659 }
 660
 661 #if wxUSE_LISTBOX
 662
 663 void wxControlRenderer::DrawItems(const wxListBox *lbox,
 664                                   size_t itemFirst, size_t itemLast)
 665 {
 666     DoDrawItems(lbox, itemFirst, itemLast);
 667 }
 668
 669 void wxControlRenderer::DoDrawItems(const wxListBox *lbox,
 670                                     size_t itemFirst, size_t itemLast,
 671                                     bool isCheckLbox)
 672 {
 673     // prepare for the drawing: calc the initial position
 674     wxCoord lineHeight = lbox->GetLineHeight();
 675
 676     // note that SetClippingRegion() needs the physical (unscrolled)
 677     // coordinates while we use the logical (scrolled) ones for the drawing
 678     // itself
 679     wxRect rect;
 680     wxSize size = lbox->GetClientSize();
 681     rect.width = size.x;
 682     rect.height = size.y;
 683
 684     // keep the text inside the client rect or we will overwrite the vertical
 685     // scrollbar for the long strings
 686     m_dc.SetClippingRegion(rect.x, rect.y, rect.width + 1, rect.height + 1);
 687
 688     // adjust the rect position now
 689     lbox->CalcScrolledPosition(rect.x, rect.y, &rect.x, &rect.y);
 690     rect.y += itemFirst*lineHeight;
 691     rect.height = lineHeight;
 692
 693     // the rect should go to the right visible border so adjust the width if x
 694     // is shifted (rightmost point should stay the same)
 695     rect.width -= rect.x;
 696
 697     // we'll keep the text colour unchanged
 698     m_dc.SetTextForeground(lbox->GetForegroundColour());
 699
 700     // an item should have the focused rect only when the lbox has focus, so
 701     // make sure that we never set wxCONTROL_FOCUSED flag if it doesn't
 702     int itemCurrent = wxWindow::FindFocus() == (wxWindow *)lbox // cast needed
 703                         ? lbox->GetCurrentItem()
 704                         : -1;
 705     for ( size_t n = itemFirst; n < itemLast; n++ )
 706     {
 707         int flags = 0;
 708         if ( (int)n == itemCurrent )
 709             flags |= wxCONTROL_FOCUSED;
 710         if ( lbox->IsSelected(n) )
 711             flags |= wxCONTROL_SELECTED;
 712
 713 #if wxUSE_CHECKLISTBOX
 714         if ( isCheckLbox )
 715         {
 716             wxCheckListBox *checklstbox = wxStaticCast(lbox, wxCheckListBox);
 717             if ( checklstbox->IsChecked(n) )
 718                 flags |= wxCONTROL_CHECKED;
 719
 720             m_renderer->DrawCheckItem(m_dc, lbox->GetString(n),
 721                                       wxNullBitmap,
 722                                       rect,
 723                                       flags);
 724         }
 725         else
 726 #endif // wxUSE_CHECKLISTBOX
 727         {
 728             m_renderer->DrawItem(m_dc, lbox->GetString(n), rect, flags);
 729         }
 730
 731         rect.y += lineHeight;
 732     }
 733 }
 734
 735 #endif // wxUSE_LISTBOX
 736
 737 #if wxUSE_CHECKLISTBOX
 738
 739 void wxControlRenderer::DrawCheckItems(const wxCheckListBox *lbox,
 740                                        size_t itemFirst, size_t itemLast)
 741 {
 742     DoDrawItems(lbox, itemFirst, itemLast, TRUE);
 743 }
 744
 745 #endif // wxUSE_CHECKLISTBOX
 746
 747 #if wxUSE_GAUGE
 748
 749 void wxControlRenderer::DrawProgressBar(const wxGauge *gauge)
 750 {
 751     // draw background
 752     m_dc.SetBrush(wxBrush(m_window->GetBackgroundColour(), wxSOLID));
 753     m_dc.SetPen(*wxTRANSPARENT_PEN);
 754     m_dc.DrawRectangle(m_rect);
 755
 756     int max = gauge->GetRange();
 757     if ( !max )
 758     {
 759         // nothing to draw
 760         return;
 761     }
 762
 763     // calc the filled rect
 764     int pos = gauge->GetValue();
 765     int left = max - pos;
 766
 767     wxRect rect = m_rect;
 768     rect.Deflate(1); // FIXME this depends on the border width
 769
 770     m_dc.SetBrush(wxBrush(m_window->GetForegroundColour(), wxSOLID));
 771
 772     if ( gauge->IsSmooth() )
 773     {
 774         // just draw the rectangle in one go
 775         if ( gauge->IsVertical() )
 776         {
 777             // vert bars grow from bottom to top
 778             wxCoord dy = ((rect.height - 1) * left) / max;
 779             rect.y += dy;
 780             rect.height -= dy;
 781         }
 782         else // horizontal
 783         {
 784             // grow from left to right
 785             rect.width -= ((rect.width - 1) * left) / max;
 786         }
 787
 788         m_dc.DrawRectangle(rect);
 789     }
 790     else // discrete
 791     {
 792         wxSize sizeStep = m_renderer->GetProgressBarStep();
 793         int step = gauge->IsVertical() ? sizeStep.y : sizeStep.x;
 794
 795         // we divide by it below!
 796         wxCHECK_RET( step, _T("invalid wxGauge step") );
 797
 798         // round up to make the progress appear to start faster
 799         int lenTotal = gauge->IsVertical() ? rect.height : rect.width;
 800         int steps = ((lenTotal + step - 1) * pos) / (max * step);
 801
 802         // calc the coords of one small rect
 803         wxCoord *px, dx, dy;
 804         if ( gauge->IsVertical() )
 805         {
 806             // draw from bottom to top: so first set y to the bottom
 807             rect.y += rect.height - 1;
 808
 809             // then adjust the height
 810             rect.height = step;
 811
 812             // and then adjust y again to be what it should for the first rect
 813             rect.y -= rect.height;
 814
 815             // we are going up
 816             step = -step;
 817
 818             // remember that this will be the coord which will change
 819             px = &rect.y;
 820
 821             dy = 1;
 822             dx = 0;
 823         }
 824         else // horizontal
 825         {
 826             // don't leave 2 empty pixels in the beginning
 827             rect.x--;
 828
 829             px = &rect.x;
 830             rect.width = step;
 831
 832             dy = 0;
 833             dx = 1;
 834         }
 835
 836         for ( int n = 0; n < steps; n++ )
 837         {
 838             wxRect rectSegment = rect;
 839             rectSegment.Deflate(dx, dy);
 840
 841             m_dc.DrawRectangle(rectSegment);
 842
 843             *px += step;
 844             if ( *px < 1 )
 845             {
 846                 // this can only happen for the last step of vertical gauge
 847                 rect.height = *px - step - 1;
 848                 *px = 1;
 849             }
 850             else if ( *px > lenTotal - step )
 851             {
 852                 // this can only happen for the last step of horizontal gauge
 853                 rect.width = lenTotal - *px - 1;
 854             }
 855         }
 856     }
 857 }
 858
 859 #endif // wxUSE_GAUGE
 860