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