src/msw/statbmp.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_STATBMP
  28
  29 #include "wx/statbmp.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/window.h"
  33     #include "wx/icon.h"
  34 #endif
  35
  36 #include "wx/msw/private.h"
  37
  38 #include "wx/sysopt.h"
  39
  40 #include <stdio.h>
  41
  42 // ---------------------------------------------------------------------------
  43 // macors
  44 // ---------------------------------------------------------------------------
  45
  46 #if wxUSE_EXTENDED_RTTI
  47 WX_DEFINE_FLAGS( wxStaticBitmapStyle )
  48
  49 wxBEGIN_FLAGS( wxStaticBitmapStyle )
  50     // new style border flags, we put them first to
  51     // use them for streaming out
  52     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  53     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  54     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  55     wxFLAGS_MEMBER(wxBORDER_RAISED)
  56     wxFLAGS_MEMBER(wxBORDER_STATIC)
  57     wxFLAGS_MEMBER(wxBORDER_NONE)
  58
  59     // old style border flags
  60     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  61     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  62     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  63     wxFLAGS_MEMBER(wxRAISED_BORDER)
  64     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  65     wxFLAGS_MEMBER(wxBORDER)
  66
  67     // standard window styles
  68     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  69     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  70     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  71     wxFLAGS_MEMBER(wxWANTS_CHARS)
  72     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  73     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  74     wxFLAGS_MEMBER(wxVSCROLL)
  75     wxFLAGS_MEMBER(wxHSCROLL)
  76
  77 wxEND_FLAGS( wxStaticBitmapStyle )
  78
  79 IMPLEMENT_DYNAMIC_CLASS_XTI(wxStaticBitmap, wxControl,"wx/statbmp.h")
  80
  81 wxBEGIN_PROPERTIES_TABLE(wxStaticBitmap)
  82     wxPROPERTY_FLAGS( WindowStyle , wxStaticBitmapStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
  83 wxEND_PROPERTIES_TABLE()
  84
  85 wxBEGIN_HANDLERS_TABLE(wxStaticBitmap)
  86 wxEND_HANDLERS_TABLE()
  87
  88 wxCONSTRUCTOR_5( wxStaticBitmap, wxWindow* , Parent , wxWindowID , Id , wxBitmap, Bitmap, wxPoint , Position , wxSize , Size )
  89
  90 #else
  91 IMPLEMENT_DYNAMIC_CLASS(wxStaticBitmap, wxControl)
  92 #endif
  93
  94 /*
  95     TODO PROPERTIES :
  96         bitmap
  97 */
  98
  99 // ===========================================================================
 100 // implementation
 101 // ===========================================================================
 102
 103 // ---------------------------------------------------------------------------
 104 // wxStaticBitmap
 105 // ---------------------------------------------------------------------------
 106
 107 // we may have either bitmap or icon: if a bitmap with mask is passed, we
 108 // will transform it to an icon ourselves because otherwise the mask will
 109 // be ignored by Windows
 110 // note that this function will create a new object every time
 111 // it is called even if the image needs no conversion
 112
 113 static wxGDIImage* ConvertImage( const wxGDIImage& bitmap )
 114 {
 115     bool isIcon = bitmap.IsKindOf( CLASSINFO(wxIcon) );
 116
 117     if( !isIcon )
 118     {
 119         wxASSERT_MSG( wxDynamicCast(&bitmap, wxBitmap),
 120                       _T("not an icon and not a bitmap?") );
 121
 122         const wxBitmap& bmp = (const wxBitmap&)bitmap;
 123         wxMask *mask = bmp.GetMask();
 124         if ( mask && mask->GetMaskBitmap() )
 125         {
 126             wxIcon* icon = new wxIcon;
 127             icon->CopyFromBitmap(bmp);
 128
 129             return icon;
 130         }
 131
 132         return new wxBitmap( bmp );
 133     }
 134
 135     // copying a bitmap is a cheap operation
 136     return new wxIcon( (const wxIcon&)bitmap );
 137 }
 138
 139 bool wxStaticBitmap::Create(wxWindow *parent,
 140                             wxWindowID id,
 141                             const wxGDIImage& bitmap,
 142                             const wxPoint& pos,
 143                             const wxSize& size,
 144                             long style,
 145                             const wxString& name)
 146 {
 147     if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
 148         return false;
 149
 150     // we may have either bitmap or icon: if a bitmap with mask is passed, we
 151     // will transform it to an icon ourselves because otherwise the mask will
 152     // be ignored by Windows
 153     m_isIcon = bitmap.IsKindOf(CLASSINFO(wxIcon));
 154
 155     wxGDIImage *image = ConvertImage( bitmap );
 156     m_isIcon = image->IsKindOf( CLASSINFO(wxIcon) );
 157
 158     // create the native control
 159     if ( !MSWCreateControl(_T("STATIC"), wxEmptyString, pos, size) )
 160     {
 161         // control creation failed
 162         return false;
 163     }
 164
 165     // no need to delete the new image
 166     SetImageNoCopy(image);
 167
 168     // GetBestSize will work properly now, so set the best size if needed
 169     SetInitialSize(size);
 170
 171     // Win9x and 2000 don't draw correctly the images with alpha channel so we
 172     // need to draw them ourselves and it's easier to just always do it rather
 173     // than check if we have an image with alpha or not
 174     if ( wxGetWinVersion() <= wxWinVersion_2000 )
 175     {
 176         Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBitmap::DoPaintManually));
 177     }
 178
 179     return true;
 180 }
 181
 182 WXDWORD wxStaticBitmap::MSWGetStyle(long style, WXDWORD *exstyle) const
 183 {
 184     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 185
 186     // what kind of control are we?
 187     msStyle |= m_isIcon ? SS_ICON : SS_BITMAP;
 188
 189     // we use SS_CENTERIMAGE to prevent the control from resizing the bitmap to
 190     // fit to its size -- this is unexpected and doesn't happen in other ports
 191     //
 192     // and SS_NOTIFY is necessary to receive mouse events
 193     msStyle |= SS_CENTERIMAGE | SS_NOTIFY;
 194
 195     return msStyle;
 196 }
 197
 198 bool wxStaticBitmap::ImageIsOk() const
 199 {
 200     return m_image && m_image->Ok();
 201 }
 202
 203 wxIcon wxStaticBitmap::GetIcon() const
 204 {
 205     wxCHECK_MSG( m_image, wxIcon(), _T("no image in wxStaticBitmap") );
 206
 207     // we can't ask for an icon if all we have is a bitmap
 208     wxCHECK_MSG( m_isIcon, wxIcon(), _T("no icon in this wxStaticBitmap") );
 209
 210     return *(wxIcon *)m_image;
 211 }
 212
 213 wxBitmap wxStaticBitmap::GetBitmap() const
 214 {
 215     if ( m_isIcon )
 216     {
 217         // don't fail because we might have replaced the bitmap with icon
 218         // ourselves internally in ConvertImage() to keep the transparency but
 219         // the user code doesn't know about it so it still can use GetBitmap()
 220         // to retrieve the bitmap
 221         return wxBitmap(GetIcon());
 222     }
 223     else // we have a bitmap
 224     {
 225         wxCHECK_MSG( m_image, wxBitmap(), _T("no image in wxStaticBitmap") );
 226
 227         return *(wxBitmap *)m_image;
 228     }
 229 }
 230
 231 void wxStaticBitmap::Free()
 232 {
 233     delete m_image;
 234
 235     m_image = NULL;
 236 }
 237
 238 wxSize wxStaticBitmap::DoGetBestSize() const
 239 {
 240     if ( ImageIsOk() )
 241     {
 242         wxSize best(m_image->GetWidth(), m_image->GetHeight());
 243         CacheBestSize(best);
 244         return best;
 245     }
 246
 247     // this is completely arbitrary
 248     return wxSize(16, 16);
 249 }
 250
 251 void wxStaticBitmap::DoPaintManually(wxPaintEvent& WXUNUSED(event))
 252 {
 253     wxPaintDC dc(this);
 254
 255     const wxSize size(GetSize());
 256     const wxBitmap bmp(GetBitmap());
 257
 258     // Clear the background
 259     dc.SetBrush(GetBackgroundColour());
 260     dc.SetPen(*wxTRANSPARENT_PEN);
 261     dc.DrawRectangle(0, 0, size.GetWidth(), size.GetHeight());
 262
 263     // Draw the image in the middle
 264     dc.DrawBitmap(bmp,
 265                   (size.GetWidth() - bmp.GetWidth()) / 2,
 266                   (size.GetHeight() - bmp.GetHeight()) / 2,
 267                   true /* use mask */);
 268 }
 269
 270 void wxStaticBitmap::SetImage( const wxGDIImage* image )
 271 {
 272     wxGDIImage* convertedImage = ConvertImage( *image );
 273     SetImageNoCopy( convertedImage );
 274     InvalidateBestSize();
 275 }
 276
 277 void wxStaticBitmap::SetImageNoCopy( wxGDIImage* image)
 278 {
 279     Free();
 280
 281     m_isIcon = image->IsKindOf( CLASSINFO(wxIcon) );
 282     // the image has already been copied
 283     m_image = image;
 284
 285     int x, y;
 286     int w, h;
 287     GetPosition(&x, &y);
 288     GetSize(&w, &h);
 289
 290 #ifdef __WIN32__
 291     HANDLE handle = (HANDLE)m_image->GetHandle();
 292     LONG style = ::GetWindowLong( (HWND)GetHWND(), GWL_STYLE ) ;
 293     ::SetWindowLong( (HWND)GetHWND(), GWL_STYLE, ( style & ~( SS_BITMAP|SS_ICON ) ) |
 294                      ( m_isIcon ? SS_ICON : SS_BITMAP ) );
 295     HGDIOBJ oldHandle = (HGDIOBJ)::SendMessage(GetHwnd(), STM_SETIMAGE,
 296                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 297     // detect if this is still the handle we passed before or
 298     // if the static-control made a copy of the bitmap!
 299     if (m_currentHandle != 0 && oldHandle != (HGDIOBJ) m_currentHandle)
 300     {
 301         // the static control made a copy and we are responsible for deleting it
 302         DeleteObject((HGDIOBJ) oldHandle);
 303     }
 304     m_currentHandle = (WXHANDLE)handle;
 305 #endif // Win32
 306
 307     if ( ImageIsOk() )
 308     {
 309         int width = image->GetWidth(),
 310             height = image->GetHeight();
 311         if ( width && height )
 312         {
 313             w = width;
 314             h = height;
 315
 316             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 317         }
 318     }
 319
 320     RECT rect;
 321     rect.left   = x;
 322     rect.top    = y;
 323     rect.right  = x + w;
 324     rect.bottom = y + h;
 325     ::InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 326 }
 327
 328 #endif // wxUSE_STATBMP