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 #include "wx/msw/wrapcctl.h"            // for HIMAGELIST
  26
  27 #ifndef DSS_HIDEPREFIX
  28 #define DSS_HIDEPREFIX  0x0200
  29 #endif
  30
  31 // ----------------------------------------------------------------------------
  32 // constants for base class
  33 // ----------------------------------------------------------------------------
  34
  35 int wxOwnerDrawnBase::ms_defaultMargin = 3;
  36
  37 // ============================================================================
  38 // implementation of wxOwnerDrawn class
  39 // ============================================================================
  40
  41 // draw the item
  42 bool wxOwnerDrawn::OnDrawItem(wxDC& dc, const wxRect& rc,
  43                               wxODAction, wxODStatus stat)
  44 {
  45     // we do nothing if item isn't ownerdrawn
  46     if ( !IsOwnerDrawn() )
  47         return true;
  48
  49     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
  50     HDC hdc = GetHdcOf(*impl);
  51
  52     RECT rect;
  53     wxCopyRectToRECT(rc, rect);
  54
  55     {
  56         // set the font and colors
  57         wxFont font;
  58         GetFontToUse(font);
  59
  60         wxColour colText, colBack;
  61         GetColourToUse(stat, colText, colBack);
  62
  63         SelectInHDC selFont(hdc, GetHfontOf(font));
  64
  65         wxMSWImpl::wxTextColoursChanger textCol(hdc, colText, colBack);
  66         wxMSWImpl::wxBkModeChanger bkMode(hdc, wxBRUSHSTYLE_TRANSPARENT);
  67
  68
  69         AutoHBRUSH hbr(wxColourToPalRGB(colBack));
  70         SelectInHDC selBrush(hdc, hbr);
  71
  72         ::FillRect(hdc, &rect, hbr);
  73
  74         // using native API because it recognizes '&'
  75
  76         wxString text = GetName();
  77
  78         SIZE sizeRect;
  79         ::GetTextExtentPoint32(hdc, text.c_str(), text.length(), &sizeRect);
  80
  81         int flags = DST_PREFIXTEXT;
  82         if ( (stat & wxODDisabled) && !(stat & wxODSelected) )
  83             flags |= DSS_DISABLED;
  84
  85         if ( (stat & wxODHidePrefix) )
  86             flags |= DSS_HIDEPREFIX;
  87
  88         int x = rc.x + GetMarginWidth();
  89         int y = rc.y + (rc.GetHeight() - sizeRect.cy) / 2;
  90         int cx = rc.GetWidth() - GetMarginWidth();
  91         int cy = sizeRect.cy;
  92
  93         ::DrawState(hdc, NULL, NULL, (LPARAM)text.wx_str(),
  94                     text.length(), x, y, cx, cy, flags);
  95
  96     } // reset to default the font, colors and brush
  97
  98     if (stat & wxODHasFocus)
  99         ::DrawFocusRect(hdc, &rect);
 100
 101     return true;
 102 }
 103
 104 // ----------------------------------------------------------------------------
 105 // global helper functions implemented here
 106 // ----------------------------------------------------------------------------
 107
 108 BOOL wxDrawStateBitmap(HDC hDC, HBITMAP hBitmap, int x, int y, UINT uState)
 109 {
 110     // determine size of bitmap image
 111     BITMAP bmp;
 112     if ( !::GetObject(hBitmap, sizeof(BITMAP), &bmp) )
 113         return FALSE;
 114
 115     BOOL result;
 116
 117     switch ( uState )
 118     {
 119         case wxDSB_NORMAL:
 120         case wxDSB_SELECTED:
 121             {
 122                 // uses image list functions to draw
 123                 //  - normal bitmap with support transparency
 124                 //    (image list internally create mask etc.)
 125                 //  - blend bitmap with the background colour
 126                 //    (like default selected items)
 127                 HIMAGELIST hIml = ::ImageList_Create(bmp.bmWidth, bmp.bmHeight,
 128                                                      ILC_COLOR32 | ILC_MASK, 1, 1);
 129                 ::ImageList_Add(hIml, hBitmap, NULL);
 130                 UINT fStyle = uState == wxDSB_SELECTED ? ILD_SELECTED : ILD_NORMAL;
 131                 result = ::ImageList_Draw(hIml, 0, hDC, x, y, fStyle);
 132                 ::ImageList_Destroy(hIml);
 133             }
 134             break;
 135
 136         case wxDSB_DISABLED:
 137             result = ::DrawState(hDC, NULL, NULL, (LPARAM)hBitmap, 0, x, y,
 138                                  bmp.bmWidth, bmp.bmHeight,
 139                                  DST_BITMAP | DSS_DISABLED);
 140             break;
 141
 142         default:
 143             wxFAIL_MSG( wxT("DrawStateBitmap: unknown wxDSBStates value") );
 144             result = FALSE;
 145     }
 146
 147     return result;
 148 }
 149
 150 #endif // wxUSE_OWNER_DRAWN