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/app.h"
  33     #include "wx/window.h"
  34     #include "wx/icon.h"
  35     #include "wx/dcclient.h"
  36 #endif
  37
  38 #include "wx/msw/private.h"
  39
  40 #include "wx/sysopt.h"
  41
  42 #include <stdio.h>
  43
  44 // ---------------------------------------------------------------------------
  45 // macros
  46 // ---------------------------------------------------------------------------
  47
  48 wxBEGIN_EVENT_TABLE(wxStaticBitmap, wxStaticBitmapBase)
  49     EVT_SIZE(wxStaticBitmap::WXHandleSize)
  50 wxEND_EVENT_TABLE()
  51
  52 // ===========================================================================
  53 // implementation
  54 // ===========================================================================
  55
  56 // ---------------------------------------------------------------------------
  57 // wxStaticBitmap
  58 // ---------------------------------------------------------------------------
  59
  60 // we may have either bitmap or icon: if a bitmap with mask is passed, we
  61 // will transform it to an icon ourselves because otherwise the mask will
  62 // be ignored by Windows
  63 // note that this function will create a new object every time
  64 // it is called even if the image needs no conversion
  65
  66 static wxGDIImage* ConvertImage( const wxGDIImage& bitmap )
  67 {
  68     bool isIcon = bitmap.IsKindOf( wxCLASSINFO(wxIcon) );
  69
  70     if( !isIcon )
  71     {
  72         wxASSERT_MSG( wxDynamicCast(&bitmap, wxBitmap),
  73                       wxT("not an icon and not a bitmap?") );
  74
  75         const wxBitmap& bmp = (const wxBitmap&)bitmap;
  76         wxMask *mask = bmp.GetMask();
  77         if ( mask && mask->GetMaskBitmap() )
  78         {
  79             wxIcon* icon = new wxIcon;
  80             icon->CopyFromBitmap(bmp);
  81
  82             return icon;
  83         }
  84
  85         return new wxBitmap( bmp );
  86     }
  87
  88     // copying a bitmap is a cheap operation
  89     return new wxIcon( (const wxIcon&)bitmap );
  90 }
  91
  92 bool wxStaticBitmap::Create(wxWindow *parent,
  93                             wxWindowID id,
  94                             const wxGDIImage& bitmap,
  95                             const wxPoint& pos,
  96                             const wxSize& size,
  97                             long style,
  98                             const wxString& name)
  99 {
 100     if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
 101         return false;
 102
 103     // we may have either bitmap or icon: if a bitmap with mask is passed, we
 104     // will transform it to an icon ourselves because otherwise the mask will
 105     // be ignored by Windows
 106     m_isIcon = bitmap.IsKindOf(wxCLASSINFO(wxIcon));
 107
 108     wxGDIImage *image = ConvertImage( bitmap );
 109     m_isIcon = image->IsKindOf( wxCLASSINFO(wxIcon) );
 110
 111     // create the native control
 112     if ( !MSWCreateControl(wxT("STATIC"), wxEmptyString, pos, size) )
 113     {
 114         // control creation failed
 115         return false;
 116     }
 117
 118     // no need to delete the new image
 119     SetImageNoCopy(image);
 120
 121     // GetBestSize will work properly now, so set the best size if needed
 122     SetInitialSize(size);
 123
 124     // painting manually is reported not to work under Windows CE (see #10093),
 125     // so don't do it there even if this probably means that alpha is not
 126     // supported there -- but at least bitmaps without alpha appear correctly
 127 #ifndef __WXWINCE__
 128     // Windows versions before XP (and even XP if the application has no
 129     // manifest and so the old comctl32.dll is used) don't draw correctly the
 130     // images with alpha channel so we need to draw them ourselves and it's
 131     // easier to just always do it rather than check if we have an image with
 132     // alpha or not
 133     if ( wxTheApp->GetComCtl32Version() < 600 )
 134     {
 135         Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBitmap::DoPaintManually));
 136     }
 137 #endif // !__WXWINCE__
 138
 139     return true;
 140 }
 141
 142 WXDWORD wxStaticBitmap::MSWGetStyle(long style, WXDWORD *exstyle) const
 143 {
 144     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 145
 146     // what kind of control are we?
 147     msStyle |= m_isIcon ? SS_ICON : SS_BITMAP;
 148
 149     // we use SS_CENTERIMAGE to prevent the control from resizing the bitmap to
 150     // fit to its size -- this is unexpected and doesn't happen in other ports
 151     //
 152     // and SS_NOTIFY is necessary to receive mouse events
 153     msStyle |= SS_CENTERIMAGE | SS_NOTIFY;
 154
 155     return msStyle;
 156 }
 157
 158 bool wxStaticBitmap::ImageIsOk() const
 159 {
 160     return m_image && m_image->IsOk();
 161 }
 162
 163 wxIcon wxStaticBitmap::GetIcon() const
 164 {
 165     wxCHECK_MSG( m_image, wxIcon(), wxT("no image in wxStaticBitmap") );
 166
 167     // we can't ask for an icon if all we have is a bitmap
 168     wxCHECK_MSG( m_isIcon, wxIcon(), wxT("no icon in this wxStaticBitmap") );
 169
 170     return *(wxIcon *)m_image;
 171 }
 172
 173 wxBitmap wxStaticBitmap::GetBitmap() const
 174 {
 175     if ( m_isIcon )
 176     {
 177         // don't fail because we might have replaced the bitmap with icon
 178         // ourselves internally in ConvertImage() to keep the transparency but
 179         // the user code doesn't know about it so it still can use GetBitmap()
 180         // to retrieve the bitmap
 181         return wxBitmap(GetIcon());
 182     }
 183     else // we have a bitmap
 184     {
 185         wxCHECK_MSG( m_image, wxBitmap(), wxT("no image in wxStaticBitmap") );
 186
 187         return *(wxBitmap *)m_image;
 188     }
 189 }
 190
 191 void wxStaticBitmap::Free()
 192 {
 193     wxDELETE(m_image);
 194 }
 195
 196 wxSize wxStaticBitmap::DoGetBestClientSize() const
 197 {
 198     wxSize size;
 199     if ( ImageIsOk() )
 200     {
 201         size = m_image->GetSize();
 202     }
 203     else // No image yet
 204     {
 205         // this is completely arbitrary
 206         size.x =
 207         size.y = 16;
 208     }
 209
 210     return size;
 211 }
 212
 213 void wxStaticBitmap::WXHandleSize(wxSizeEvent& event)
 214 {
 215     // Invalidate everything when our size changes as the image position (it's
 216     // drawn centred in the window client area) changes.
 217     Refresh();
 218
 219     event.Skip();
 220 }
 221
 222 #ifndef __WXWINCE__
 223
 224 void wxStaticBitmap::DoPaintManually(wxPaintEvent& WXUNUSED(event))
 225 {
 226     wxPaintDC dc(this);
 227
 228     const wxSize size(GetSize());
 229     const wxBitmap bmp(GetBitmap());
 230
 231     // Clear the background: notice that we're supposed to be transparent, so
 232     // use the parent background colour if we don't have our own instead of
 233     // falling back to the default
 234     const wxWindow *win = UseBgCol() ? this : GetParent();
 235     dc.SetBrush(win->GetBackgroundColour());
 236     dc.SetPen(*wxTRANSPARENT_PEN);
 237     dc.DrawRectangle(0, 0, size.GetWidth(), size.GetHeight());
 238
 239     // Draw the image in the middle
 240     dc.DrawBitmap(bmp,
 241                   (size.GetWidth() - bmp.GetWidth()) / 2,
 242                   (size.GetHeight() - bmp.GetHeight()) / 2,
 243                   true /* use mask */);
 244 }
 245
 246 #endif // !__WXWINCE__
 247
 248 void wxStaticBitmap::SetImage( const wxGDIImage* image )
 249 {
 250     wxGDIImage* convertedImage = ConvertImage( *image );
 251     SetImageNoCopy( convertedImage );
 252 }
 253
 254 void wxStaticBitmap::SetImageNoCopy( wxGDIImage* image)
 255 {
 256     Free();
 257     InvalidateBestSize();
 258
 259     m_isIcon = image->IsKindOf( wxCLASSINFO(wxIcon) );
 260     // the image has already been copied
 261     m_image = image;
 262
 263     int x, y;
 264     int w, h;
 265     GetPosition(&x, &y);
 266     GetSize(&w, &h);
 267
 268 #ifdef __WIN32__
 269     HANDLE handle = (HANDLE)m_image->GetHandle();
 270     LONG style = ::GetWindowLong( (HWND)GetHWND(), GWL_STYLE ) ;
 271     ::SetWindowLong( (HWND)GetHWND(), GWL_STYLE, ( style & ~( SS_BITMAP|SS_ICON ) ) |
 272                      ( m_isIcon ? SS_ICON : SS_BITMAP ) );
 273     HGDIOBJ oldHandle = (HGDIOBJ)::SendMessage(GetHwnd(), STM_SETIMAGE,
 274                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 275     // detect if this is still the handle we passed before or
 276     // if the static-control made a copy of the bitmap!
 277     if (m_currentHandle != 0 && oldHandle != (HGDIOBJ) m_currentHandle)
 278     {
 279         // the static control made a copy and we are responsible for deleting it
 280         DeleteObject((HGDIOBJ) oldHandle);
 281     }
 282     m_currentHandle = (WXHANDLE)handle;
 283 #endif // Win32
 284
 285     if ( ImageIsOk() )
 286     {
 287         int width = image->GetWidth(),
 288             height = image->GetHeight();
 289         if ( width && height )
 290         {
 291             w = width;
 292             h = height;
 293
 294             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 295         }
 296     }
 297
 298     RECT rect;
 299     rect.left   = x;
 300     rect.top    = y;
 301     rect.right  = x + w;
 302     rect.bottom = y + h;
 303     ::InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 304 }
 305
 306 #endif // wxUSE_STATBMP