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 #endif
  39
  40 #include "wx/msw/private.h"
  41
  42 #if wxUSE_RESOURCE_LOADING_IN_MSW
  43     #include "wx/msw/curico.h"
  44     #include "wx/msw/curicop.h"
  45 #endif
  46
  47 // ----------------------------------------------------------------------------
  48 // wxWin macros
  49 // ----------------------------------------------------------------------------
  50
  51 IMPLEMENT_DYNAMIC_CLASS(wxIcon, wxIconBase)
  52
  53 // ============================================================================
  54 // implementation
  55 // ============================================================================
  56
  57 // ----------------------------------------------------------------------------
  58 // wxIconRefData
  59 // ----------------------------------------------------------------------------
  60
  61 void wxIconRefData::Free()
  62 {
  63     if ( m_hIcon )
  64     {
  65         ::DestroyIcon((HICON) m_hIcon);
  66
  67         m_hIcon = 0;
  68     }
  69 }
  70
  71 // ----------------------------------------------------------------------------
  72 // wxIcon
  73 // ----------------------------------------------------------------------------
  74
  75 wxIcon::wxIcon(const char bits[], int width, int height)
  76 {
  77     wxBitmap bmp(bits, width, height);
  78     CopyFromBitmap(bmp);
  79 }
  80
  81 wxIcon::wxIcon(const wxString& iconfile,
  82                long flags,
  83                int desiredWidth,
  84                int desiredHeight)
  85
  86 {
  87     LoadFile(iconfile, flags, desiredWidth, desiredHeight);
  88 }
  89
  90 wxIcon::~wxIcon()
  91 {
  92 }
  93
  94 void wxIcon::CopyFromBitmap(const wxBitmap& bmp)
  95 {
  96 #ifdef __WIN32__
  97     wxMask *mask = bmp.GetMask();
  98     if ( !mask )
  99     {
 100         // we must have a mask for an icon, so even if it's probably incorrect,
 101         // do create it (grey is the "standard" transparent colour)
 102         mask = new wxMask(bmp, *wxLIGHT_GREY);
 103     }
 104
 105     ICONINFO iconInfo;
 106     iconInfo.fIcon = TRUE;  // we want an icon, not a cursor
 107     iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
 108     iconInfo.hbmColor = GetHbitmapOf(bmp);
 109
 110     /* GRG: black out the transparent area to preserve background
 111      * colour, because Windows blits the original bitmap using
 112      * SRCINVERT (XOR) after applying the mask to the dest rect.
 113      */
 114     HDC dcSrc = ::CreateCompatibleDC(NULL);
 115     HDC dcDst = ::CreateCompatibleDC(NULL);
 116     SelectObject(dcSrc, (HBITMAP)mask->GetMaskBitmap());
 117     SelectObject(dcDst, iconInfo.hbmColor);
 118
 119     BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(), dcSrc, 0, 0, SRCAND);
 120
 121     SelectObject(dcDst, NULL);
 122     SelectObject(dcSrc, NULL);
 123     DeleteDC(dcDst);
 124     DeleteDC(dcSrc);
 125
 126     HICON hicon = ::CreateIconIndirect(&iconInfo);
 127     if ( !hicon )
 128     {
 129         wxLogLastError(wxT("CreateIconIndirect"));
 130     }
 131     else
 132     {
 133         SetHICON((WXHICON)hicon);
 134         SetSize(bmp.GetWidth(), bmp.GetHeight());
 135     }
 136
 137     if ( !bmp.GetMask() )
 138     {
 139         // we created the mask, now delete it
 140         delete mask;
 141     }
 142 #else // Win16
 143     // there are some functions in curico.cpp which probably could be used
 144     // here...
 145     // This probably doesn't work.
 146     HBITMAP hBitmap = (HBITMAP) bmp.GetHBITMAP();
 147     HICON hIcon = MakeIconFromBitmap((HINSTANCE) wxGetInstance(), hBitmap);
 148     if (hIcon)
 149     {
 150         SetHICON((WXHICON)hIcon);
 151         SetSize(bmp.GetWidth(), bmp.GetHeight());
 152     }
 153
 154 //    wxFAIL_MSG("Bitmap to icon conversion (including use of XPMs for icons) not implemented");
 155 #endif // Win32/16
 156 }
 157
 158 void wxIcon::CreateIconFromXpm(const char **data)
 159 {
 160     wxBitmap bmp(data);
 161     CopyFromBitmap(bmp);
 162 }
 163
 164 bool wxIcon::LoadFile(const wxString& filename,
 165                       long type,
 166                       int desiredWidth, int desiredHeight)
 167 {
 168     UnRef();
 169
 170     wxGDIImageHandler *handler = FindHandler(type);
 171
 172     if ( !handler )
 173     {
 174         // say something?
 175         return FALSE;
 176     }
 177
 178     return handler->Load(this, filename, type, desiredWidth, desiredHeight);
 179 }
 180