src/msw/statbmp.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        statbmp.cpp
   3 // Purpose:     wxStaticBitmap
   4 // Author:      Julian Smart
   5 // Modified by:
   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 "statbmp.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 #if wxUSE_STATBMP
  32
  33 #include "wx/window.h"
  34 #include "wx/msw/private.h"
  35
  36 #ifndef WX_PRECOMP
  37     #include "wx/icon.h"
  38     #include "wx/statbmp.h"
  39 #endif
  40
  41 #include <stdio.h>
  42
  43 // ---------------------------------------------------------------------------
  44 // macors
  45 // ---------------------------------------------------------------------------
  46
  47 IMPLEMENT_DYNAMIC_CLASS(wxStaticBitmap, wxControl)
  48
  49 // ===========================================================================
  50 // implementation
  51 // ===========================================================================
  52
  53 // ---------------------------------------------------------------------------
  54 // wxStaticBitmap
  55 // ---------------------------------------------------------------------------
  56
  57 // we may have either bitmap or icon: if a bitmap with mask is passed, we
  58 // will transform it to an icon ourselves because otherwise the mask will
  59 // be ignored by Windows
  60 // note that this function will create a new object every time
  61 // it is called even if the image needs no conversion
  62
  63 #ifndef __WIN16__
  64
  65 static wxGDIImage* ConvertImage( const wxGDIImage& bitmap )
  66 {
  67     bool isIcon = bitmap.IsKindOf( CLASSINFO(wxIcon) );
  68
  69     if( !isIcon )
  70     {
  71         wxASSERT_MSG( wxDynamicCast(&bitmap, wxBitmap),
  72                       _T("not an icon and not a bitmap?") );
  73
  74         const wxBitmap& bmp = (const wxBitmap&)bitmap;
  75         wxMask *mask = bmp.GetMask();
  76         if ( mask && mask->GetMaskBitmap() )
  77         {
  78             wxIcon* icon = new wxIcon;
  79             icon->CopyFromBitmap(bmp);
  80
  81             return icon;
  82         }
  83
  84         return new wxBitmap( bmp );
  85     }
  86
  87     // copying a bitmap is a cheap operation
  88     return new wxIcon( (const wxIcon&)bitmap );
  89 }
  90
  91 #endif
  92
  93 bool wxStaticBitmap::Create(wxWindow *parent,
  94                             wxWindowID id,
  95                             const wxGDIImage& bitmap,
  96                             const wxPoint& pos,
  97                             const wxSize& size,
  98                             long style,
  99                             const wxString& name)
 100 {
 101     if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
 102         return FALSE;
 103
 104     // we may have either bitmap or icon: if a bitmap with mask is passed, we
 105     // will transform it to an icon ourselves because otherwise the mask will
 106     // be ignored by Windows
 107     wxGDIImage *image = (wxGDIImage *)NULL;
 108     m_isIcon = bitmap.IsKindOf(CLASSINFO(wxIcon));
 109
 110 #ifdef __WIN16__
 111     wxASSERT_MSG( !m_isIcon, "Icons are not supported in wxStaticBitmap under WIN16." );
 112     image = &bitmap;
 113 #else // Win32
 114     image = ConvertImage( bitmap );
 115     m_isIcon = image->IsKindOf( CLASSINFO(wxIcon) );
 116 #endif // Win16/32
 117
 118     // create the native control
 119     if ( !MSWCreateControl(
 120 #ifdef __WIN32__
 121                            _T("STATIC"),
 122 #else // Win16
 123                            _T("BUTTON"),
 124 #endif // Win32/16
 125                            _T(""), pos, size) )
 126     {
 127         // control creation failed
 128         return FALSE;
 129     }
 130
 131     // no need to delete the new image
 132     SetImageNoCopy(image);
 133
 134     return TRUE;
 135 }
 136
 137 WXDWORD wxStaticBitmap::MSWGetStyle(long style, WXDWORD *exstyle) const
 138 {
 139     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 140
 141 #ifdef __WIN32__
 142     // what kind of control are we?
 143     msStyle |= m_isIcon ? SS_ICON : SS_BITMAP;
 144
 145     // we use SS_CENTERIMAGE to prevent the control from resizing the bitmap to
 146     // fit to its size -- this is unexpected and doesn't happen in other ports
 147     msStyle |= SS_CENTERIMAGE;
 148 #else // Win16
 149     msStyle |= BS_OWNERDRAW;
 150 #endif // Win32/16
 151
 152     return msStyle;
 153 }
 154
 155 bool wxStaticBitmap::ImageIsOk() const
 156 {
 157     return m_image && m_image->Ok();
 158 }
 159
 160 void wxStaticBitmap::Free()
 161 {
 162     delete m_image;
 163
 164     m_image = NULL;
 165 }
 166
 167 wxSize wxStaticBitmap::DoGetBestSize() const
 168 {
 169     // reuse the current size (as wxWindow does) instead of using some
 170     // arbitrary default size (as wxControl, our immediate base class, does)
 171     return wxWindow::DoGetBestSize();
 172 }
 173
 174 void wxStaticBitmap::SetImage( const wxGDIImage* image )
 175 {
 176     wxGDIImage* convertedImage = ConvertImage( *image );
 177     SetImageNoCopy( convertedImage );
 178 }
 179
 180 void wxStaticBitmap::SetImageNoCopy( wxGDIImage* image)
 181 {
 182     Free();
 183
 184     m_isIcon = image->IsKindOf( CLASSINFO(wxIcon) );
 185     // the image has already been copied
 186     m_image = image;
 187
 188     int x, y;
 189     int w, h;
 190     GetPosition(&x, &y);
 191     GetSize(&w, &h);
 192
 193 #ifdef __WIN32__
 194     HANDLE handle = (HANDLE)m_image->GetHandle();
 195     LONG style = ::GetWindowLong( (HWND)GetHWND(), GWL_STYLE ) ;
 196     ::SetWindowLong( (HWND)GetHWND(), GWL_STYLE, ( style & ~( SS_BITMAP|SS_ICON ) ) |
 197                      ( m_isIcon ? SS_ICON : SS_BITMAP ) );
 198     ::SendMessage(GetHwnd(), STM_SETIMAGE,
 199                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 200 #endif // Win32
 201
 202     if ( ImageIsOk() )
 203     {
 204         int width = image->GetWidth(),
 205             height = image->GetHeight();
 206         if ( width && height )
 207         {
 208             w = width;
 209             h = height;
 210
 211             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 212         }
 213     }
 214
 215     RECT rect;
 216     rect.left   = x;
 217     rect.top    = y;
 218     rect.right  = x + w;
 219     rect.bottom = y + h;
 220     InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 221 }
 222
 223 // under Win32 we use the standard static control style for this
 224 #ifdef __WIN16__
 225 bool wxStaticBitmap::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 226 {
 227     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
 228
 229     wxCHECK_MSG( !m_isIcon, FALSE, _T("icons not supported in wxStaticBitmap") );
 230
 231     wxBitmap* bitmap = (wxBitmap *)m_image;
 232     if ( !bitmap->Ok() )
 233         return FALSE;
 234
 235     HDC hDC = lpDIS->hDC;
 236     HDC memDC = ::CreateCompatibleDC(hDC);
 237
 238     HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
 239
 240     if (!old)
 241         return FALSE;
 242
 243     int x = lpDIS->rcItem.left;
 244     int y = lpDIS->rcItem.top;
 245     int width = lpDIS->rcItem.right - x;
 246     int height = lpDIS->rcItem.bottom - y;
 247
 248     // Centre the bitmap in the control area
 249     int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
 250     int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
 251
 252     ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
 253
 254     ::SelectObject(memDC, old);
 255
 256     ::DeleteDC(memDC);
 257
 258     return TRUE;
 259 }
 260 #endif // Win16
 261
 262 // We need this or the control can never be moved e.g. in Dialog Editor.
 263 long wxStaticBitmap::MSWWindowProc(WXUINT nMsg,
 264                                    WXWPARAM wParam,
 265                                    WXLPARAM lParam)
 266 {
 267     // Ensure that static items get messages. Some controls don't like this
 268     // message to be intercepted (e.g. RichEdit), hence the tests.
 269     if ( nMsg == WM_NCHITTEST )
 270         return (long)HTCLIENT;
 271
 272     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 273 }
 274
 275 #endif // wxUSE_STATBMP