src/msw/icon.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/icon.cpp
   3 // Purpose:     wxIcon class
   4 // Author:      Julian Smart
   5 // Modified by: 20.11.99 (VZ): don't derive from wxBitmap any more
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "icon.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/defs.h"
  33     #include "wx/list.h"
  34     #include "wx/utils.h"
  35     #include "wx/app.h"
  36     #include "wx/icon.h"
  37     #include "wx/bitmap.h"
  38     #include "wx/log.h"
  39 #endif
  40
  41 #include "wx/msw/private.h"
  42
  43 #if wxUSE_RESOURCE_LOADING_IN_MSW
  44     #include "wx/msw/curico.h"
  45     #include "wx/msw/curicop.h"
  46 #endif
  47
  48 // ----------------------------------------------------------------------------
  49 // wxWin macros
  50 // ----------------------------------------------------------------------------
  51
  52 IMPLEMENT_DYNAMIC_CLASS(wxIcon, wxGDIObject)
  53
  54 // ============================================================================
  55 // implementation
  56 // ============================================================================
  57
  58 // ----------------------------------------------------------------------------
  59 // wxIconRefData
  60 // ----------------------------------------------------------------------------
  61
  62 void wxIconRefData::Free()
  63 {
  64     if ( m_hIcon )
  65     {
  66 #ifndef __WXMICROWIN__
  67         ::DestroyIcon((HICON) m_hIcon);
  68 #endif
  69
  70         m_hIcon = 0;
  71     }
  72 }
  73
  74 // ----------------------------------------------------------------------------
  75 // wxIcon
  76 // ----------------------------------------------------------------------------
  77
  78 wxIcon::wxIcon(const char bits[], int width, int height)
  79 {
  80     wxBitmap bmp(bits, width, height);
  81     CopyFromBitmap(bmp);
  82 }
  83
  84 wxIcon::wxIcon(const wxString& iconfile,
  85                long flags,
  86                int desiredWidth,
  87                int desiredHeight)
  88
  89 {
  90     LoadFile(iconfile, flags, desiredWidth, desiredHeight);
  91 }
  92
  93 wxIcon::~wxIcon()
  94 {
  95 }
  96
  97 void wxIcon::CopyFromBitmap(const wxBitmap& bmp)
  98 {
  99 #ifndef __WXMICROWIN__
 100 #ifdef __WIN32__
 101     wxMask *mask = bmp.GetMask();
 102     if ( !mask )
 103     {
 104         // we must have a mask for an icon, so even if it's probably incorrect,
 105         // do create it (grey is the "standard" transparent colour)
 106         mask = new wxMask(bmp, *wxLIGHT_GREY);
 107     }
 108
 109     ICONINFO iconInfo;
 110     iconInfo.fIcon = TRUE;  // we want an icon, not a cursor
 111     iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
 112     iconInfo.hbmColor = GetHbitmapOf(bmp);
 113
 114     // black out the transparent area to preserve background colour, because
 115     // Windows blits the original bitmap using SRCINVERT (XOR) after applying
 116     // the mask to the dest rect.
 117     {
 118         MemoryHDC dcSrc, dcDst;
 119         SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()),
 120                     selectBitmap(dcDst, iconInfo.hbmColor);
 121
 122         if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
 123                        dcSrc, 0, 0, SRCAND) )
 124         {
 125             wxLogLastError(_T("BitBlt"));
 126         }
 127     }
 128
 129     HICON hicon = ::CreateIconIndirect(&iconInfo);
 130     if ( !hicon )
 131     {
 132         wxLogLastError(wxT("CreateIconIndirect"));
 133     }
 134     else
 135     {
 136         SetHICON((WXHICON)hicon);
 137         SetSize(bmp.GetWidth(), bmp.GetHeight());
 138     }
 139
 140     if ( !bmp.GetMask() )
 141     {
 142         // we created the mask, now delete it
 143         delete mask;
 144     }
 145
 146     // delete the inverted mask bitmap we created as well
 147     ::DeleteObject(iconInfo.hbmMask);
 148 #else // Win16
 149     // there are some functions in curico.cpp which probably could be used
 150     // here...
 151     // This probably doesn't work.
 152     HBITMAP hBitmap = (HBITMAP) bmp.GetHBITMAP();
 153     HICON hIcon = MakeIconFromBitmap((HINSTANCE) wxGetInstance(), hBitmap);
 154     if (hIcon)
 155     {
 156         SetHICON((WXHICON)hIcon);
 157         SetSize(bmp.GetWidth(), bmp.GetHeight());
 158     }
 159
 160 //    wxFAIL_MSG("Bitmap to icon conversion (including use of XPMs for icons) not implemented");
 161 #endif // Win32/16
 162 #endif
 163 }
 164
 165 void wxIcon::CreateIconFromXpm(const char **data)
 166 {
 167     wxBitmap bmp(data);
 168     CopyFromBitmap(bmp);
 169 }
 170
 171 bool wxIcon::LoadFile(const wxString& filename,
 172                       long type,
 173                       int desiredWidth, int desiredHeight)
 174 {
 175     UnRef();
 176
 177     wxGDIImageHandler *handler = FindHandler(type);
 178
 179     if ( !handler )
 180     {
 181         // say something?
 182         return FALSE;
 183     }
 184
 185     return handler->Load(this, filename, type, desiredWidth, desiredHeight);
 186 }
 187