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 and Markus Holzem
   9 // Licence:     wxWindows license
  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, wxIconBase)
  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     /* GRG: black out the transparent area to preserve background
 115      * colour, because Windows blits the original bitmap using
 116      * SRCINVERT (XOR) after applying the mask to the dest rect.
 117      */
 118     HDC dcSrc = ::CreateCompatibleDC(NULL);
 119     HDC dcDst = ::CreateCompatibleDC(NULL);
 120     SelectObject(dcSrc, (HBITMAP)mask->GetMaskBitmap());
 121     SelectObject(dcDst, iconInfo.hbmColor);
 122
 123     BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(), dcSrc, 0, 0, SRCAND);
 124
 125     SelectObject(dcDst, NULL);
 126     SelectObject(dcSrc, NULL);
 127     DeleteDC(dcDst);
 128     DeleteDC(dcSrc);
 129
 130     HICON hicon = ::CreateIconIndirect(&iconInfo);
 131     if ( !hicon )
 132     {
 133         wxLogLastError(wxT("CreateIconIndirect"));
 134     }
 135     else
 136     {
 137         SetHICON((WXHICON)hicon);
 138         SetSize(bmp.GetWidth(), bmp.GetHeight());
 139     }
 140
 141     if ( !bmp.GetMask() )
 142     {
 143         // we created the mask, now delete it
 144         delete mask;
 145     }
 146 #else // Win16
 147     // there are some functions in curico.cpp which probably could be used
 148     // here...
 149     // This probably doesn't work.
 150     HBITMAP hBitmap = (HBITMAP) bmp.GetHBITMAP();
 151     HICON hIcon = MakeIconFromBitmap((HINSTANCE) wxGetInstance(), hBitmap);
 152     if (hIcon)
 153     {
 154         SetHICON((WXHICON)hIcon);
 155         SetSize(bmp.GetWidth(), bmp.GetHeight());
 156     }
 157
 158 //    wxFAIL_MSG("Bitmap to icon conversion (including use of XPMs for icons) not implemented");
 159 #endif // Win32/16
 160 #endif
 161 }
 162
 163 void wxIcon::CreateIconFromXpm(const char **data)
 164 {
 165     wxBitmap bmp(data);
 166     CopyFromBitmap(bmp);
 167 }
 168
 169 bool wxIcon::LoadFile(const wxString& filename,
 170                       long type,
 171                       int desiredWidth, int desiredHeight)
 172 {
 173     UnRef();
 174
 175     wxGDIImageHandler *handler = FindHandler(type);
 176
 177     if ( !handler )
 178     {
 179         // say something?
 180         return FALSE;
 181     }
 182
 183     return handler->Load(this, filename, type, desiredWidth, desiredHeight);
 184 }
 185