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 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_OWNER_DRAWN
  19
  20 #include "wx/ownerdrw.h"
  21 #include "wx/msw/dc.h"
  22 #include "wx/msw/private.h"
  23 #include "wx/msw/private/dc.h"
  24 #include "wx/msw/wrapcctl.h"            // for HIMAGELIST
  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     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
  49     HDC hdc = GetHdcOf(*impl);
  50
  51     RECT rect;
  52     wxCopyRectToRECT(rc, rect);
  53
  54     {
  55         // set the font and colors
  56         wxFont font;
  57         GetFontToUse(font);
  58
  59         wxColour colText, colBack;
  60         GetColourToUse(stat, colText, colBack);
  61
  62         SelectInHDC selFont(hdc, GetHfontOf(font));
  63
  64         wxMSWImpl::wxTextColoursChanger textCol(hdc, colText, colBack);
  65         wxMSWImpl::wxBkModeChanger bkMode(hdc, wxBRUSHSTYLE_TRANSPARENT);
  66
  67
  68         AutoHBRUSH hbr(wxColourToPalRGB(colBack));
  69         SelectInHDC selBrush(hdc, hbr);
  70
  71         ::FillRect(hdc, &rect, hbr);
  72
  73         // using native API because it recognizes '&'
  74
  75         wxString text = GetName();
  76
  77         SIZE sizeRect;
  78         ::GetTextExtentPoint32(hdc, text.c_str(), text.length(), &sizeRect);
  79
  80         int flags = DST_PREFIXTEXT;
  81         if ( (stat & wxODDisabled) && !(stat & wxODSelected) )
  82             flags |= DSS_DISABLED;
  83
  84         if ( (stat & wxODHidePrefix) )
  85             flags |= DSS_HIDEPREFIX;
  86
  87         int x = rc.x + GetMarginWidth();
  88         int y = rc.y + (rc.GetHeight() - sizeRect.cy) / 2;
  89         int cx = rc.GetWidth() - GetMarginWidth();
  90         int cy = sizeRect.cy;
  91
  92         ::DrawState(hdc, NULL, NULL, wxMSW_CONV_LPARAM(text),
  93                     text.length(), x, y, cx, cy, flags);
  94
  95     } // reset to default the font, colors and brush
  96
  97     if (stat & wxODHasFocus)
  98         ::DrawFocusRect(hdc, &rect);
  99
 100     return true;
 101 }
 102
 103 // ----------------------------------------------------------------------------
 104 // global helper functions implemented here
 105 // ----------------------------------------------------------------------------
 106
 107 BOOL wxDrawStateBitmap(HDC hDC, HBITMAP hBitmap, int x, int y, UINT uState)
 108 {
 109     // determine size of bitmap image
 110     BITMAP bmp;
 111     if ( !::GetObject(hBitmap, sizeof(BITMAP), &bmp) )
 112         return FALSE;
 113
 114     BOOL result;
 115
 116     switch ( uState )
 117     {
 118         case wxDSB_NORMAL:
 119         case wxDSB_SELECTED:
 120             {
 121                 // uses image list functions to draw
 122                 //  - normal bitmap with support transparency
 123                 //    (image list internally create mask etc.)
 124                 //  - blend bitmap with the background colour
 125                 //    (like default selected items)
 126                 HIMAGELIST hIml = ::ImageList_Create(bmp.bmWidth, bmp.bmHeight,
 127                                                      ILC_COLOR32 | ILC_MASK, 1, 1);
 128                 ::ImageList_Add(hIml, hBitmap, NULL);
 129                 UINT fStyle = uState == wxDSB_SELECTED ? ILD_SELECTED : ILD_NORMAL;
 130                 result = ::ImageList_Draw(hIml, 0, hDC, x, y, fStyle);
 131                 ::ImageList_Destroy(hIml);
 132             }
 133             break;
 134
 135         case wxDSB_DISABLED:
 136             result = ::DrawState(hDC, NULL, NULL, (LPARAM)hBitmap, 0, x, y,
 137                                  bmp.bmWidth, bmp.bmHeight,
 138                                  DST_BITMAP | DSS_DISABLED);
 139             break;
 140
 141         default:
 142             wxFAIL_MSG( wxT("DrawStateBitmap: unknown wxDSBStates value") );
 143             result = FALSE;
 144     }
 145
 146     return result;
 147 }
 148
 149 #endif // wxUSE_OWNER_DRAWN