src/msw/ownerdrw.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/ownerdrw.cpp
   3 // Purpose:     implementation of wxOwnerDrawn class
   4 // Author:      Vadim Zeitlin
   5 // Modified by: Marcin Malich
   6 // Created:     13.11.97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_OWNER_DRAWN
  20
  21 #include "wx/ownerdrw.h"
  22 #include "wx/msw/dc.h"
  23 #include "wx/msw/private.h"
  24 #include "wx/msw/private/dc.h"
  25
  26 #ifndef DSS_HIDEPREFIX
  27 #define DSS_HIDEPREFIX  0x0200
  28 #endif
  29
  30 // ----------------------------------------------------------------------------
  31 // constants for base class
  32 // ----------------------------------------------------------------------------
  33
  34 int wxOwnerDrawnBase::ms_defaultMargin = 3;
  35
  36 // ============================================================================
  37 // implementation of wxOwnerDrawn class
  38 // ============================================================================
  39
  40 // draw the item
  41 bool wxOwnerDrawn::OnDrawItem(wxDC& dc, const wxRect& rc,
  42                               wxODAction, wxODStatus stat)
  43 {
  44     // we do nothing if item isn't ownerdrawn
  45     if ( !IsOwnerDrawn() )
  46         return true;
  47
  48     // set the font and colors
  49     wxFont font;
  50     GetFontToUse(font);
  51
  52     wxColour colText, colBack;
  53     GetColourToUse(stat, colText, colBack);
  54
  55     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
  56     HDC hdc = GetHdcOf(*impl);
  57
  58     SelectInHDC selFont(hdc, GetHfontOf(font));
  59
  60     wxMSWImpl::wxTextColoursChanger textCol(hdc, colText, colBack);
  61     wxMSWImpl::wxBkModeChanger bkMode(hdc, wxBRUSHSTYLE_TRANSPARENT);
  62
  63
  64     AutoHBRUSH hbr(wxColourToPalRGB(colBack));
  65     SelectInHDC selBrush(hdc, hbr);
  66
  67     RECT rectFill;
  68     wxCopyRectToRECT(rc, rectFill);
  69     ::FillRect(hdc, &rectFill, hbr);
  70
  71     // using native API because it recognizes '&'
  72
  73     wxString text = GetName();
  74
  75     SIZE sizeRect;
  76     ::GetTextExtentPoint32(hdc, text.c_str(), text.length(), &sizeRect);
  77
  78     int flags = DST_PREFIXTEXT;
  79     if ( (stat & wxODDisabled) && !(stat & wxODSelected) )
  80         flags |= DSS_DISABLED;
  81
  82     if ( (stat & wxODHidePrefix) )
  83         flags |= DSS_HIDEPREFIX;
  84
  85     int x = rc.x + GetMarginWidth();
  86     int y = rc.y + (rc.GetHeight() - sizeRect.cy) / 2;
  87     int cx = rc.GetWidth() - GetMarginWidth();
  88     int cy = sizeRect.cy;
  89
  90     ::DrawState(hdc, NULL, NULL, (LPARAM)text.wx_str(),
  91                 text.length(), x, y, cx, cy, flags);
  92
  93     return true;
  94 }
  95
  96 // ----------------------------------------------------------------------------
  97 // global helper functions implemented here
  98 // ----------------------------------------------------------------------------
  99
 100 BOOL wxDrawStateBitmap(HDC hDC, HBITMAP hBitmap, int x, int y, UINT uState)
 101 {
 102     // determine size of bitmap image
 103     BITMAP bmp;
 104     if ( !::GetObject(hBitmap, sizeof(BITMAP), &bmp) )
 105         return FALSE;
 106
 107     BOOL result;
 108
 109     switch ( uState )
 110     {
 111         case wxDSB_NORMAL:
 112         case wxDSB_SELECTED:
 113             {
 114                 // uses image list functions to draw
 115                 //  - normal bitmap with support transparency
 116                 //    (image list internally create mask etc.)
 117                 //  - blend bitmap with the background colour
 118                 //    (like default selected items)
 119                 HIMAGELIST hIml = ::ImageList_Create(bmp.bmWidth, bmp.bmHeight,
 120                                                      ILC_COLOR32 | ILC_MASK, 1, 1);
 121                 ::ImageList_Add(hIml, hBitmap, NULL);
 122                 UINT fStyle = uState == wxDSB_SELECTED ? ILD_SELECTED : ILD_NORMAL;
 123                 result = ::ImageList_Draw(hIml, 0, hDC, x, y, fStyle);
 124                 ::ImageList_Destroy(hIml);
 125             }
 126             break;
 127
 128         case wxDSB_DISABLED:
 129             result = ::DrawState(hDC, NULL, NULL, (LPARAM)hBitmap, 0, x, y,
 130                                  bmp.bmWidth, bmp.bmHeight,
 131                                  DST_BITMAP | DSS_DISABLED);
 132             break;
 133
 134         default:
 135             wxFAIL_MSG( wxT("DrawStateBitmap: unknown wxDSBStates value") );
 136             result = FALSE;
 137     }
 138
 139     return result;
 140 }
 141
 142 #endif // wxUSE_OWNER_DRAWN