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         ::DestroyIcon((HICON) m_hIcon);
  67
  68         m_hIcon = 0;
  69     }
  70 }
  71
  72 // ----------------------------------------------------------------------------
  73 // wxIcon
  74 // ----------------------------------------------------------------------------
  75
  76 wxIcon::wxIcon(const char bits[], int width, int height)
  77 {
  78     wxBitmap bmp(bits, width, height);
  79     CopyFromBitmap(bmp);
  80 }
  81
  82 wxIcon::wxIcon(const wxString& iconfile,
  83                long flags,
  84                int desiredWidth,
  85                int desiredHeight)
  86
  87 {
  88     LoadFile(iconfile, flags, desiredWidth, desiredHeight);
  89 }
  90
  91 wxIcon::~wxIcon()
  92 {
  93 }
  94
  95 void wxIcon::CopyFromBitmap(const wxBitmap& bmp)
  96 {
  97 #ifdef __WIN32__
  98     wxMask *mask = bmp.GetMask();
  99     if ( !mask )
 100     {
 101         // we must have a mask for an icon, so even if it's probably incorrect,
 102         // do create it (grey is the "standard" transparent colour)
 103         mask = new wxMask(bmp, *wxLIGHT_GREY);
 104     }
 105
 106     ICONINFO iconInfo;
 107     iconInfo.fIcon = TRUE;  // we want an icon, not a cursor
 108     iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
 109     iconInfo.hbmColor = GetHbitmapOf(bmp);
 110
 111     /* GRG: black out the transparent area to preserve background
 112      * colour, because Windows blits the original bitmap using
 113      * SRCINVERT (XOR) after applying the mask to the dest rect.
 114      */
 115     HDC dcSrc = ::CreateCompatibleDC(NULL);
 116     HDC dcDst = ::CreateCompatibleDC(NULL);
 117     SelectObject(dcSrc, (HBITMAP)mask->GetMaskBitmap());
 118     SelectObject(dcDst, iconInfo.hbmColor);
 119
 120     BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(), dcSrc, 0, 0, SRCAND);
 121
 122     SelectObject(dcDst, NULL);
 123     SelectObject(dcSrc, NULL);
 124     DeleteDC(dcDst);
 125     DeleteDC(dcSrc);
 126
 127     HICON hicon = ::CreateIconIndirect(&iconInfo);
 128     if ( !hicon )
 129     {
 130         wxLogLastError(wxT("CreateIconIndirect"));
 131     }
 132     else
 133     {
 134         SetHICON((WXHICON)hicon);
 135         SetSize(bmp.GetWidth(), bmp.GetHeight());
 136     }
 137
 138     if ( !bmp.GetMask() )
 139     {
 140         // we created the mask, now delete it
 141         delete mask;
 142     }
 143 #else // Win16
 144     // there are some functions in curico.cpp which probably could be used
 145     // here...
 146     // This probably doesn't work.
 147     HBITMAP hBitmap = (HBITMAP) bmp.GetHBITMAP();
 148     HICON hIcon = MakeIconFromBitmap((HINSTANCE) wxGetInstance(), hBitmap);
 149     if (hIcon)
 150     {
 151         SetHICON((WXHICON)hIcon);
 152         SetSize(bmp.GetWidth(), bmp.GetHeight());
 153     }
 154
 155 //    wxFAIL_MSG("Bitmap to icon conversion (including use of XPMs for icons) not implemented");
 156 #endif // Win32/16
 157 }
 158
 159 void wxIcon::CreateIconFromXpm(const char **data)
 160 {
 161     wxBitmap bmp(data);
 162     CopyFromBitmap(bmp);
 163 }
 164
 165 bool wxIcon::LoadFile(const wxString& filename,
 166                       long type,
 167                       int desiredWidth, int desiredHeight)
 168 {
 169     UnRef();
 170
 171     wxGDIImageHandler *handler = FindHandler(type);
 172
 173     if ( !handler )
 174     {
 175         // say something?
 176         return FALSE;
 177     }
 178
 179     return handler->Load(this, filename, type, desiredWidth, desiredHeight);
 180 }
 181