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
   9 // Licence:     wxWindows licence
  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                            wxEmptyString, 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 wxBorder wxStaticBitmap::GetDefaultBorder() const
 138 {
 139     return wxBORDER_NONE;
 140 }
 141
 142 WXDWORD wxStaticBitmap::MSWGetStyle(long style, WXDWORD *exstyle) const
 143 {
 144     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 145
 146 #ifdef __WIN32__
 147     // what kind of control are we?
 148     msStyle |= m_isIcon ? SS_ICON : SS_BITMAP;
 149
 150     // we use SS_CENTERIMAGE to prevent the control from resizing the bitmap to
 151     // fit to its size -- this is unexpected and doesn't happen in other ports
 152     msStyle |= SS_CENTERIMAGE;
 153 #else // Win16
 154     msStyle |= BS_OWNERDRAW;
 155 #endif // Win32/16
 156
 157     return msStyle;
 158 }
 159
 160 bool wxStaticBitmap::ImageIsOk() const
 161 {
 162     return m_image && m_image->Ok();
 163 }
 164
 165 void wxStaticBitmap::Free()
 166 {
 167     delete m_image;
 168
 169     m_image = NULL;
 170 }
 171
 172 wxSize wxStaticBitmap::DoGetBestSize() const
 173 {
 174     // reuse the current size (as wxWindow does) instead of using some
 175     // arbitrary default size (as wxControl, our immediate base class, does)
 176     return wxWindow::DoGetBestSize();
 177 }
 178
 179 void wxStaticBitmap::SetImage( const wxGDIImage* image )
 180 {
 181     wxGDIImage* convertedImage = ConvertImage( *image );
 182     SetImageNoCopy( convertedImage );
 183 }
 184
 185 void wxStaticBitmap::SetImageNoCopy( wxGDIImage* image)
 186 {
 187     Free();
 188
 189     m_isIcon = image->IsKindOf( CLASSINFO(wxIcon) );
 190     // the image has already been copied
 191     m_image = image;
 192
 193     int x, y;
 194     int w, h;
 195     GetPosition(&x, &y);
 196     GetSize(&w, &h);
 197
 198 #ifdef __WIN32__
 199     HANDLE handle = (HANDLE)m_image->GetHandle();
 200     LONG style = ::GetWindowLong( (HWND)GetHWND(), GWL_STYLE ) ;
 201     ::SetWindowLong( (HWND)GetHWND(), GWL_STYLE, ( style & ~( SS_BITMAP|SS_ICON ) ) |
 202                      ( m_isIcon ? SS_ICON : SS_BITMAP ) );
 203     ::SendMessage(GetHwnd(), STM_SETIMAGE,
 204                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 205 #endif // Win32
 206
 207     if ( ImageIsOk() )
 208     {
 209         int width = image->GetWidth(),
 210             height = image->GetHeight();
 211         if ( width && height )
 212         {
 213             w = width;
 214             h = height;
 215
 216             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 217         }
 218     }
 219
 220     RECT rect;
 221     rect.left   = x;
 222     rect.top    = y;
 223     rect.right  = x + w;
 224     rect.bottom = y + h;
 225     InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 226 }
 227
 228 // under Win32 we use the standard static control style for this
 229 #ifdef __WIN16__
 230 bool wxStaticBitmap::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 231 {
 232     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
 233
 234     wxCHECK_MSG( !m_isIcon, FALSE, _T("icons not supported in wxStaticBitmap") );
 235
 236     wxBitmap* bitmap = (wxBitmap *)m_image;
 237     if ( !bitmap->Ok() )
 238         return FALSE;
 239
 240     HDC hDC = lpDIS->hDC;
 241     HDC memDC = ::CreateCompatibleDC(hDC);
 242
 243     HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
 244
 245     if (!old)
 246         return FALSE;
 247
 248     int x = lpDIS->rcItem.left;
 249     int y = lpDIS->rcItem.top;
 250     int width = lpDIS->rcItem.right - x;
 251     int height = lpDIS->rcItem.bottom - y;
 252
 253     // Centre the bitmap in the control area
 254     int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
 255     int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
 256
 257     ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
 258
 259     ::SelectObject(memDC, old);
 260
 261     ::DeleteDC(memDC);
 262
 263     return TRUE;
 264 }
 265 #endif // Win16
 266
 267 // We need this or the control can never be moved e.g. in Dialog Editor.
 268 long wxStaticBitmap::MSWWindowProc(WXUINT nMsg,
 269                                    WXWPARAM wParam,
 270                                    WXLPARAM lParam)
 271 {
 272 #ifndef __WXWINCE__
 273     // Ensure that static items get messages. Some controls don't like this
 274     // message to be intercepted (e.g. RichEdit), hence the tests.
 275     if ( nMsg == WM_NCHITTEST )
 276         return (long)HTCLIENT;
 277 #endif
 278
 279     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 280 }
 281
 282 #endif // wxUSE_STATBMP